(19)
(11)EP 3 255 201 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
09.09.2020 Bulletin 2020/37

(21)Application number: 15880861.8

(22)Date of filing:  15.07.2015
(51)International Patent Classification (IPC): 
D06F 58/20(2006.01)
F28F 9/02(2006.01)
F28D 9/00(2006.01)
D06F 58/24(2006.01)
F28D 7/08(2006.01)
F28D 21/00(2006.01)
(86)International application number:
PCT/CN2015/084070
(87)International publication number:
WO 2016/123906 (11.08.2016 Gazette  2016/32)

(54)

AIR CONDENSER AND CLOTHES-DRYING MACHINE

LUFTKONDENSATOR UND WÄSCHETROCKNUNGSMASCHINE

CONDENSEUR À AIR ET MACHINE À SÉCHER LE LINGE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 04.02.2015 CN 201510057233

(43)Date of publication of application:
13.12.2017 Bulletin 2017/50

(73)Proprietor: Qingdao Haier Washing Machine Co., Ltd.
Qingdao, Shandong 266101 (CN)

(72)Inventors:
  • BING, Jindong
    Qingdao Shandong 266101 (CN)
  • SUN, Pengju
    Qingdao Shandong 266101 (CN)
  • SHI, Yanqi
    Qingdao Shandong 266101 (CN)
  • WANG, Jian
    Qingdao Shandong 266101 (CN)

(74)Representative: Pfenning, Meinig & Partner mbB 
Patent- und Rechtsanwälte Theresienhöhe 11a
80339 München
80339 München (DE)


(56)References cited: : 
EP-A1- 1 936 022
EP-A2- 1 939 571
CN-A- 102 505 437
CN-A- 102 884 239
EP-A1- 2 735 641
WO-A1-2008/111732
CN-A- 102 517 861
US-A1- 2010 122 794
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    TECHNICAL FIELD



    [0001] The present invention relates to the field of clothes drying apparatuses, and particularly relates to an air condenser applied to a clothes dryer and a clothes dryer with the air condenser.

    BACKGROUND



    [0002] At present, a condenser adopted by a clothes dryer in a market is generally a cross-type air heat exchanger, and the cross-type air heat exchanger only has a single condensing air duct and a single cooling air duct arranged crosswise. For application in the clothes dryer, air inlet heat in the condensing air duct is not fully utilized, so heat efficiency is low, and energy loss is great.

    [0003] Fig. 1 and Fig. 2 show schematic diagrams of a structure of the cross-type air heat exchanger and an internal air flowing direction of the cross-type air heat exchanger. An operating principle of a traditional condenser applied to the clothes dryer is as follows: in a using process of the clothes dryer, an air duct passing through a traditional condensation-type clothes dryer is divided into a condensing air duct j' and a cooling air duct i', the cooling air duct i' is a non-closed-loop duct; and air is sucked into the clothes dryer by a fan, subjected to heat exchange on an inner surface of an air condenser 1', heated after heat exchange and then discharged out of the air condenser 1' via an outlet of the cooling air duct. The condensing air duct j' is a closed air duct; the air is circularly operated in the condensing air duct j' formed among components such as a drum 3' of the clothes dryer, the air condenser 1', a heater 2' and the like; saturated hot air 5' in the drum 3' before passing through the air condenser is sucked into the air condenser 1' by the fan and is subjected to heat exchange on the inner surface of an air condenser 1'; moisture in the saturated hot air 5' before passing through the air condenser is condensed into condensate water 9' and discharged out of the air condenser 1'; unsaturated hot air 8' discharged out of the air condenser 1' is heated by the heater 2' to become hot dry air 4'; the hot dry air enters the drum 3' of the clothes dryer and is fully contacted with clothes; the moisture on surfaces of the clothes is evaporated into water vapor; and the water vapor is sucked into the air condenser 1' and condensed, thereby forming a closed-loop circulating process. A flowing direction of the air in the cooling air duct i' is as follows: room-temperature dry air 6' before passing through the air condenser enters the air condenser 1', performs heat exchange with the saturated hot air 5' before passing through the air condenser to become hot dry air 7', and is discharged out of the air condenser 1'. Since heat carried by the hot air discharged from the condenser in the cooling air duct i' of the clothes dryer adopting the traditional condenser above is lost, heat is greatly wasted.

    [0004] Therefore, an air condenser applied to the clothes dryer and the clothes dryer with the air condenser are urgently needed in the market. The condenser can recycle the heat of the hot air with water vapor cooled by the condensing air duct for preheating low-temperature air discharged to a heating element and having no water vapor, thereby achieving an effect of saving energy.

    [0005] CN102517861A discloses a clothes drying temperature detection control method and a clothes drier. In the process of drying, a control system is used for detecting a change delta T of temperature of outgoing air in front and in rear of a condenser after drying, and determines whether the change of temperature difference of outgoing air before or after passing the condenser reaches a corresponding set value delta Tt_g or not; g is the weight of clothes to be dried; if the delta T is larger than or equal to the delta Tt_g or lasts for a set time T within a certain set value range, the clothes are dried and a heating device stops operating; after the heating device stops operating, a drying program proceeds and does not end until the detected temperature of incoming air is lower than the set temperature; and in the process of drying, heat of humid hot air after being subjected to heat exchange with clothes and before being subjected to cooling and dehumidification is subjected to heat exchange with air which is subjected to condensation and dehumidification, and the preheated air subjected to condensation and dehumidification is heated again and led into the clothes to dry the clothes.

    [0006] EP1939571A2 discloses that a heat exchange element of a heat exchanger prevents losses due to internal pressure non-uniformity. The heat exchanger includes a plurality of heat exchange sheets (3, 211, 212) which are stacked together. A plurality of airflow guide ribs (4, 5,212a,212b,212c) located between the sheets (3,211,212) have connection passages (40,50) that allow gases to flow between adjacent ducts. The flow of gasses through the connection passages (40,50) offsets pressure non-uniformity between adjacent ducts. Also, the ribs can be continuously arranged over the length of the heat exchange ducts to increase an area supporting the heat exchange sheets, and thus the sag phenomenon of the heat exchange sheet can be prevented.

    SUMMARY



    [0007] A purpose of the present invention is to propose an air condenser for solving problems in an existing art that heat of hot air is seriously wasted and heat exchange efficiency is low in a using process of a cross-type heat exchanger.

    [0008] Another purpose of the present invention is to propose a clothes dryer. The air condenser above is arranged on the clothes dryer, so that the clothes dryer is small in energy loss and high in heat exchange efficiency in a using process.

    [0009] In order to achieve the purposes, on one hand, a technical solution is adopted in the present invention as follows.

    [0010] The present invention is defined in and by the appended claims.

    [0011] Also described herein is an air condenser that includes condensing air ducts and a cooling pipeline arranged crosswise, wherein the condensing air ducts include a first group of condensing air ducts and a second group of condensing air ducts; air inlet ducts of the first group of condensing air ducts and air outlet ducts of the second group of condensing air ducts are at least partially arranged in a heat exchangeable manner; and air outlet ducts of the first group of condensing air ducts and air inlet ducts of the second group of condensing air ducts are at least partially arranged in a heat exchangeable manner.

    [0012] Further, the condensing air ducts include intermediate air ducts, wherein at least one part of the intermediate air ducts is connected between the air inlet ducts and the air outlet ducts of the first group of condensing air ducts; at least another part of the intermediate air ducts is connected between the air inlet ducts and the air outlet ducts of the second group of condensing air ducts; and the intermediate air ducts and the cooling pipeline are arranged crosswise to perform heat exchange.

    [0013] Further, the first group of condensing air ducts include at least one first condensing sheet; and the first condensing sheet is formed with at least the air inlet ducts and the air outlet ducts of the first condensing air ducts; the second group of condensing air ducts include at least one second condensing sheet; and the second condensing sheet is formed with at least the air inlet ducts and the air outlet ducts of the second condensing air ducts; the first condensing sheet and the second condensing sheet are arranged at intervals, so that the air inlet ducts of the first condensing air ducts and the air outlet ducts of the second condensing air ducts are arranged adjacently, and projections of the air inlet ducts of the first condensing air ducts and the air outlet ducts of the second condensing air ducts are at least partially overlapped; and the air outlet ducts of the first condensing air ducts and the air inlet ducts of the second condensing air ducts are arranged adjacently, and projections of the air outlet ducts of the first condensing air ducts and the air inlet ducts of the second condensing air ducts are at least partially overlapped.

    [0014] Further, the intermediate air ducts and the air inlet ducts and the air outlet ducts of the first group of condensing air ducts and the second group of condensing air ducts are formed integrally or separately.

    [0015] Further, the cooling pipeline is used for introducing low-temperature gas or liquid.

    [0016] Further, the air condenser further includes four interfaces, respectively connected with the air inlet ducts of the first group of condensing air ducts, the air outlet ducts of the first group of condensing air ducts, the air inlet ducts of the second group of condensing air ducts and the air outlet ducts of the second group of condensing air ducts.

    [0017] On the other hand, a technical solution is adopted in the present invention as follows.

    [0018] Further described herein is a clothes dryer that includes a drum and a heater, wherein the above air condenser is arranged on the clothes dryer; and the drum is communicated with first air inlets and second air inlets of the air condenser.

    [0019] The present invention has beneficial effects as follows: according to the air condenser in the present invention, the first group of condensing air ducts and the second group of condensing air ducts which can partially perform heat exchange are arranged, so that heat exchange is performed between high-temperature and high-humidity air flowing out of a drum of the clothes dryer and air condensed by the air condenser to enter the heater; the high-temperature and high-humidity air can be pre-cooled during preheating; waste heat of high-temperature air in the condensing air ducts can be effectively recycled; and loss of heat is reduced, thereby achieving a purpose of saving energy while increasing heat exchange efficiency.

    [0020] The above air condenser is arranged on the clothes dryer in the present invention. Since the waste heat of the air in the condensing air ducts can be effectively recycled by the above air condenser, the heat exchange efficiency of the heater used for heating the air is increased by 14%-20%, energy consumption is effectively saved, and the heat exchange efficiency is increased. Therefore, the clothes dryer is low in energy consumption and more environmental-friendly in a using process, and market competitiveness of the clothes dryer is improved.

    BRIEF DESCRIPTION OF DRAWINGS



    [0021] 

    Fig. 1 is a schematic diagram illustrating a structure of an air condenser and directions of air ducts passing through the air condenser in an existing art;

    Fig. 2 is a schematic diagram illustrating an air flowing direction inside a clothes dryer in an existing art;

    Fig. 3 is a schematic structural diagram illustrating air ducts of an air condenser proposed in embodiment I of the present invention;

    Fig. 4 is a schematic structural diagram illustrating a first condensing sheet proposed in embodiment I of the present invention;

    Fig. 5 is a schematic structural diagram illustrating a second condensing sheet proposed in embodiment I of the present invention;

    Fig. 6 is a schematic structural diagram illustrating a cooling package sheet proposed in embodiment I of the present invention;

    Fig. 7 is a schematic diagram illustrating an internal air flowing direction of a condensation-type clothes dryer proposed in embodiment I of the present invention;

    Fig. 8 is a schematic structural diagram illustrating a first condensing sheet proposed in embodiment II of the present invention;

    Fig. 9 is a schematic structural diagram illustrating a second condensing sheet proposed in embodiment II of the present invention;

    Fig. 10 is a schematic structural diagram illustrating a combination of a first condensing sheet and a second condensing sheet proposed in embodiment II which is not covered by the present invention;

    Fig. 11 is a schematic structural diagram illustrating an air direction in a direct discharging clothes dryer proposed in one embodiment which is not covered by the present invention;

    Fig. 12 is a schematic structural diagram illustrating an air condenser proposed in embodiment III of the present disclosure, which is not covered by the present invention;

    Fig. 13 is a schematic structural diagram illustrating an air direction in a heat-pump type clothes dryer proposed in embodiment III of the present disclosure, which is not covered by the present invention.


    List of reference numerals



    [0022] i': Cooling air duct; j': Condensing air duct; 1': Air condenser; 2': Heater; 3': Drum; 4': Hot dry air; 5': Saturated hot air before passing through the air condenser; 6': Room-temperature dry air before passing through the air condenser; 7': Hot dry air; 8': Unsaturated hot air after passing through the air condenser; 9': Condensate water;

    [0023] 1: Air condenser; 2: Heater; 3: Drum; 4: Hot dry air; 5: Saturated hot air; 6: Room-temperature dry air; 7: Hot dry air; 8: Unsaturated hot air; 9: Condensate water; 10: Heat exchange tube; 11: Cooling sheet; 111: Vent hole; 12: First condensing sheet; 121: First air guiding groove; 13: Second condensing sheet; 131: Second air guiding groove; 23: Overlap region;

    [0024] i: Cooling pipeline; j: Condensing air duct; A: First air inlet; B: Second air inlet; C: First air outlet; and D: Second air outlet.

    DETAILED DESCRIPTION



    [0025] Technical solutions of the present invention are further described below in combination with drawings through specific embodiments.

    [0026] The present invention proposes an air condenser for a clothes dryer, including condensing air ducts and a cooling pipeline arranged crosswise, wherein the condensing air ducts include a first group of condensing air ducts and a second group of condensing air ducts; air inlet ducts of the first group of condensing air ducts and air outlet ducts of the second group of condensing air ducts are at least partially arranged in a heat exchangeable manner; and air outlet ducts of the first group of condensing air ducts and air inlet ducts of the second group of condensing air ducts are at least partially arranged in a heat exchangeable manner. The condensing air ducts include intermediate air ducts, wherein at least one part of the intermediate air ducts is connected between the air inlet ducts and the air outlet ducts of the first group of condensing air ducts; at least another part of the intermediate air ducts is connected between the air inlet ducts and the air outlet ducts of the second group of condensing air ducts; and the intermediate air ducts and the cooling pipeline are arranged crosswise, so that cold air or refrigerant liquid in the cooling pipeline can perform heat exchange with the intermediate air ducts of the condensing air ducts.

    Embodiment I



    [0027] Figs. 3-7 illustrate a structure of an air condenser of a condensation-type air clothes dryer proposed by the present embodiment of the invention and a flowing direction of air in the clothes dryer in the air condenser. The air condenser in the present embodiment includes condensing air ducts j and a cooling pipeline i arranged crosswise, wherein the condensing air ducts j include a first group of condensing air ducts and a second group of condensing air ducts; air inlet ducts of the first group of condensing air ducts and air outlet ducts of the second group of condensing air ducts are at least partially arranged in a heat exchangeable manner; and air outlet ducts of the first group of condensing air ducts and air inlet ducts of the second group of condensing air ducts are at least partially arranged in a heat exchangeable manner. The cooling pipeline i is arranged between the first group of condensing air ducts and the second group of condensing air ducts and is used for enabling low-temperature gas or liquid to pass through. Hot air passing through the first group of condensing air ducts and the second group of condensing air ducts in the condensing air ducts j performs heat exchange with the low-temperature gas or liquid in the cooling pipeline i. The condensing air ducts further include intermediate air ducts, wherein at least one part of the intermediate air ducts is connected between the air inlet ducts and the air outlet ducts of the first group of condensing air ducts; and at least another part of the intermediate air ducts is connected between the air inlet ducts and the air outlet ducts of the second group of condensing air ducts. The hot air in the first group of condensing air ducts and the second group of condensing air ducts performs heat exchange with the low-temperature gas or liquid in the cooling pipeline i in the intermediate air ducts.

    [0028] The cooling pipeline i is composed of cooling sheets 11, and the cooling sheets 11 are sequentially arranged to penetrate through a whole thickness direction of the condenser. Fig. 6 illustrates a structure of the cooling sheets 11 in the present embodiment. Vent holes 111 are formed in the cooling sheets 11, have turn-up structures and are used for enabling room-temperature dry air circulating in the cooling pipeline i to pass through. The vent holes 111 formed in the cooling sheets 11 can be in any shape as long as the air can be guaranteed to pass through the vent holes 111.

    [0029] The first group of condensing air ducts of the condensing air ducts j include at least one first condensing sheet 12, and the first condensing sheet is formed with at least the air inlet ducts and the air outlet ducts of the first condensing air ducts; the second group of condensing air ducts include at least one second condensing sheet 13, and the air inlet ducts and the air outlet ducts of the second condensing air ducts are formed on the second condensing sheet 13. The first group of condensing air ducts is formed by sequentially arranging the first condensing sheets 12, and the second group of condensing air ducts is formed by sequentially arranging the second condensing sheets 13. The air inlet ducts and the air outlet ducts of the first group of condensing air ducts are formed by arranging air inlet ducts and air outlet ducts of first condensing air ducts of the first condensing sheets 12, and the air inlet ducts and the air outlet ducts of the second group of condensing air ducts are formed by arranging air inlet ducts and air outlet ducts of second condensing air ducts of the second condensing sheets 13. The first condensing sheets 12 and the second condensing sheets 13 are arranged at intervals, so that the air inlet ducts of the first condensing air ducts and the air outlet ducts of the second condensing air ducts are arranged adjacently, and projections of the air inlet ducts of the first condensing air ducts and the air outlet ducts of the second condensing air ducts are at least partially overlapped. Similarly, the air outlet ducts of the first condensing air ducts and the air inlet ducts of the second condensing air ducts are arranged adjacently, and projections of the air outlet ducts of the first condensing air ducts and the air inlet ducts of the second condensing air ducts are at least not overlapped. The first condensing sheets 12 and the second condensing sheets 13 are sequentially arranged at intervals and penetrate through a whole thickness direction of the air condenser. When the intermediate air ducts in the condensing air ducts are designed, the intermediate air ducts and the air inlet ducts and the air outlet ducts of the first group of condensing air ducts and the second group of condensing air ducts may be formed integrally or separately.

    [0030] In order to guarantee that air passing through the condensing air ducts j can pass along a flowing direction of the air ducts, air guiding grooves are formed in the first condensing sheets 12 and the second condensing sheets 13 in the present embodiment. As a more specific embodiment, first air guiding grooves 121 are formed in the first condensing sheets 12, directions of the first air guiding grooves 121 extend from first air inlets A of the condenser to first air outlets C of the condenser, and the first air guiding grooves 121 are uniformly distributed along width directions of the first air inlets and the first air outlets. Second air guiding grooves 131 are formed in the second condensing sheets 13, directions of the second air guide guiding 131 extend from second air inlets B of the condenser to second air outlets D of the condenser, and the second air guiding grooves 131 are uniformly distributed along width directions of the second air inlets B and the second air outlets D.

    [0031] The turn-up structures are arranged on the vent holes 111 of the cooling sheets 11 in the present embodiment, and are used for supporting the first condensing sheets 12 and the second condensing sheets 13 adjacent to each of the cooling sheets 11. Therefore, heights of the turn-up structures are equal to widths of the air guiding grooves formed in the first condensing sheets 12 and the second condensing sheets 13. As a further embodiment, in the present embodiment, one end of each of the first air guiding grooves 121 is fixed on the cooling sheets 11, and the other end of each of the first air guiding grooves 121 is fixed on the first condensing sheets 12; and one end of each of the second air guiding grooves 131 is fixed on the cooling sheets 11, and the other end of each of the second air guiding grooves 131 is fixed on the second condensing sheets 13.

    [0032] Fig. 7, shows an embodiment of a clothes dryer according to the present invention. The clothes dryer includes an air condenser 1, a heater 2 and a drum 3 in the present embodiment. The drum 3 is configured to contain clothes and dry the clothes in the drum 3. In a process of drying the clothes by the clothes dryer in the present embodiment, an air flowing direction and air change in the clothes dryer are as follows. In the cooling pipeline, room-temperature dry air 6 before passing through the air condenser enters the air condenser from an inlet of the cooling pipeline, performs heat exchange with saturated hot air 5 entering the condensing air ducts from the drum 3 in the cooling pipeline before passing through the air condenser, and then becomes unsaturated hot air 8. In the condensing air ducts, the saturated hot air 5 entering the air condenser 1 from the drum 3 enters the air condenser 1 from the first air inlets A and the second air inlets B of the air condenser 1 respectively for performing heat exchange and performs heat exchange to become the unsaturated hot air 8 in the air condenser 1; and the unsaturated hot air 8 is discharged from the air condenser from the first air outlets C and the second air outlets D, and is collected to enter the heater 2 together for heating. Heat exchange in two aspects needs to be performed in the air condenser 1. On one hand, heat exchange is performed between air in the condensing air ducts and air in the cooling pipeline; and on the other hand, heat exchange is performed between air in the first group of condensing air ducts and air in the second group of condensing air ducts. An air flow passing through the first air guiding grooves 121 in the first condensing sheets 12 and an air flow passing through the second air guiding grooves 131 in the first condensing sheets 13 flow together at overlap parts of the first condensing sheets 12 and the second condensing sheets 13 and perform heat exchange. The air flow passing through the first air guiding grooves in the first condensing sheets 12 is the saturated hot air 5 before passing through the air condenser, while the air flow passing through the second air guiding grooves 131 in the second condensing sheets 13 is unsaturated hot air 8. At the overlap parts of the first condensing sheets 12 and the second condensing sheets 13, heat of the saturated hot air 5 before passing through the air condenser is transferred to the unsaturated hot air 8, and then the unsaturated hot air 8 is preheated; and the unsaturated hot air 8 after passing through the air condenser pre-cools the saturated hot air 5, so that the saturated hot air 5 is further cooled by the room-temperature dry air 6 in the cooling pipeline i, and produced condensate water 9 is discharged out of the air condenser 1.

    [0033] The unsaturated hot air 8 after passing through the air condenser enters the heater 2, becomes hot dry air 4 after heated by the heater 2, and the hot dry air 4 enters the drum 3 to dry the clothes; and saturated hot air 5 after drying enters a next air cycle.

    [0034] The first condensing sheets 12, the second condensing sheets 13 and the cooling sheets 11 in the present embodiment are made of one of PVC, PET or aluminum sheets.

    [0035] As a preferred embodiment, thicknesses of the first condensing sheets 12, the second condensing sheets 13 and the cooling sheets 11 in the present embodiment are 0.2mm-0.4mm.

    [0036] The first group of condensing air ducts and the second group of condensing air ducts which can partially perform heat exchange are arranged on the air condenser 1 in the present embodiment, so that heat exchange is performed between high-temperature and high-humidity air flowing out of the drum 3 of the clothes dryer and air condensed by the air condenser 1 to enter the heater 2. The high-temperature and high-humidity air can also be pre-cooled while preheating. Waste heat of high-temperature air in the condensing air ducts can be effectively recycled, and loss of heat is reduced, thereby achieving a purpose of saving energy while increasing heat exchange efficiency.

    Embodiment II



    [0037] The present embodiment which is not covered by the present invention, proposes an air condenser and a direct discharging clothes dryer. Figs. 8-10 illustrate a structure of the air condenser proposed in the present embodiment. Like embodiment I, the air condenser in the present embodiment includes condensing air ducts and a cooling pipeline arranged crosswise. The condensing air ducts include a first group of condensing air ducts and a second group of condensing air ducts, wherein air inlet ducts of the first group of condensing air ducts and air outlet ducts of the second group of condensing air ducts are at least partially arranged in a heat exchangeable manner; and air outlet ducts of the first group of condensing air ducts and air inlet ducts of the second group of condensing air ducts are at least partially arranged in a heat exchangeable manner. The cooling pipeline is arranged between the first group of condensing air ducts and the second group of condensing air ducts and is used for enabling refrigerant gas or refrigerant liquid to pass through. Hot air passing through the first group of condensing air ducts and the second group of condensing air ducts in the condensing air ducts performs heat exchange with the refrigerant gas or refrigerant liquid in the cooling pipeline.

    [0038] The cooling pipeline is composed of cooling sheets 11, and the cooling sheets 11 are sequentially arranged to penetrate through a whole thickness direction of the condenser. Vent holes are formed in the cooling sheets 11, have turn-up structures and are used for enabling room-temperature dry air circulating in the cooling pipeline to pass through. The vent holes formed in the cooling sheets 11 can be in any shape as long as the air can be guaranteed to pass through the vent holes. In the present embodiment, structures and arrangement manners of first condensing sheets in the first group of condensing air ducts and second condensing sheets in the second group of condensing air ducts are the same as those in embodiment I.

    [0039] The first group of condensing air ducts of the condensing air ducts are formed by sequentially arranging first condensing sheets 12, and the second group of condensing air ducts are formed by sequentially arranging second condensing sheets 13. The first condensing sheets 12 and the second condensing sheets 13 are sequentially arranged at intervals and penetrate through a whole thickness direction of the air condenser. In order to guarantee that gas passing through the condensing air ducts can pass along a flowing direction of the air ducts, air guiding grooves are formed in the first condensing sheets 12 and the second condensing sheets 13 in the present embodiment. As a more specific embodiment, first air guiding grooves 121 are formed in the first condensing sheets 12. In combination with Fig. 11, directions of the first air guiding grooves 121 extend from first air inlets A of the condenser to first air outlets C of the condenser, and the first air guiding grooves 121 are uniformly distributed along width directions of the first air inlets A and the first air outlets C. Second air guiding grooves 131 are formed in the second condensing sheets 13, directions of the second air guiding grooves 131 extend from second air inlets B of the condenser to second air outlets D of the condenser, and the second air guiding grooves 131 are uniformly distributed along width directions of the second air inlets B and the second air outlets D.

    [0040] The turn-up structures are arranged on the vent holes of the cooling sheets 11 in the present embodiment, and are used for supporting the first condensing sheets 12 and the second condensing sheets 13 adjacent to each of the cooling sheets 11. Therefore, heights of the turn-up structures are equal to widths of the air guiding grooves formed in the first condensing sheets 12 and the second condensing sheets 13. As a further embodiment, in the present embodiment, one end of each of the first air guiding grooves 121 is fixed on the cooling sheets 11, and the other end of each of the first air guiding grooves 121 is fixed on the first condensing sheets 12; and one end of each of the second air guiding grooves 131 is fixed on the cooling sheets 11, and the other end of each of the second air guiding grooves 131 is fixed on the second condensing sheets 13.

    [0041] An overlap region 23 is formed between the first condensing sheets 12 and the second condensing sheets 13 in a process of forming the condensing air ducts. In the overlap region 23, since the air condenser in the present embodiment is applied to the direct discharging clothes dryer, saturated hot air 5 entering the air condenser from the first air guiding grooves 121 on the first condensing sheets 12 and the second air guiding grooves 131 on the second condensing sheets 13 respectively performs heat exchange with unsaturated hot air 8 in the second condensing sheets 13 and the first condensing sheets 12 in the overlap region 23.

    [0042] Fig. 11 illustrates an air duct circulating system for internal air of the direct discharging clothes dryer proposed in the present embodiment, and the system includes a cooling pipeline and condensing air ducts. Room-temperature dry air 6 enters the cooling pipeline, performs heat exchange to become hot dry air 7 and then enters a heater 2, and the hot dry air 7 heated by the heater 2 becomes hot dry air 4 and enters a drum 3 to dry clothes. After the clothes are dried, the hot dry air 4 becomes the saturated hot air 5, and enters the air condenser 1 from the first air inlets A and the second air inlets B to perform heat exchange. In combination with Figs. 8-10, after performing heat exchange in the air condenser 1, the saturated hot air 5 becomes unsaturated hot air 8, and the unsaturated hot air 8 is discharged out of the air condenser 1 via the first air outlets C and the second air outlets D.

    Embodiment III



    [0043] The present embodiment which is not covered by the present invention proposes an air condenser applied to a heat-pump type clothes dryer, and a heat-pump type clothes dryer using the heat-pump type air condenser. Fig. 12 and Fig. 13 illustrate a structure of the air condenser proposed in the present embodiment, and an air circulation path inside the heat-pump type clothes dryer.

    [0044] The structure of the air condenser in the present embodiment is basically the same as structures of the air condensers in embodiment I and II. Differences are as follows: mounting holes are formed in the cooling sheets 11 in the present embodiment, and heat exchange tubes 10 used for introducing condensed gas or condensed liquid are mounted in the mounting holes.

    [0045] A drum 3 on the heat-pump type clothes dryer in the present embodiment is communicated with the first air inlets A and the second air inlets B of the air condenser 1, and the heater 2 is communicated with the first air outlets C and the second air outlets D of the air condenser 1.

    [0046] Saturated hot air 5 discharged out of the drum 3 enters the air condenser 1 from the first air inlets A and the second air inlets B, performs heat exchange with the condensed gas or condensed liquid introduced into the heat exchange tubes 10 to become unsaturated hot air 8, and the unsaturated hot air 8 is discharged out of the air condenser 1 from the first air outlets C and the second air outlets D. Meanwhile, condensate water 9 produced in the heat exchange process drips through the heat exchange tubes 10 and is discharged out of the air condenser 1. The unsaturated hot air 8 after passing through the air condenser enters the heater 2, is heated to become hot dry air 4 and then enters the drum 3 to continue to dry the clothes.

    [0047] Then, the above air circulation path is repeated until the clothes are completely dried.

    [0048] The above air condenser is arranged on the clothes dryer in the present invention. Since the above air condenser can effectively recycle waste heat of air in the condensing air ducts, heat exchange efficiency of the heater used for heating the air is increased by 14%-20%, energy consumption is effectively saved, and the heat exchange efficiency is increased. Therefore, the clothes dryer is low in energy consumption and more environmental-friendly in a using process, and market competitiveness of the clothes dryer is improved.


    Claims

    1. An air condenser (1) for a clothes dryer, the clothes dryer comprising a drum (3) and a heater (2), the air condenser (1) comprising condensing air ducts (j) and a cooling pipeline (i) arranged crosswise, wherein the condensing air ducts (j) comprise a first group of condensing air ducts (j) and a second group of condensing air ducts (j); air inlet ducts of the first group of condensing air ducts (j) and air outlet ducts of the second group of condensing air ducts (j) are at least partially arranged in a heat exchangeable manner; and air outlet ducts of the first group of condensing air ducts (j) and air inlet ducts of the second group of condensing air ducts (j) are at least partially arranged in a heat exchangeable manner;
    characterized in that:

    the condensing air ducts (j) comprise intermediate air ducts;

    at least one part of the intermediate air ducts is connected between the air inlet ducts and the air outlet ducts of the first group of condensing air ducts (j);

    at least another part of the intermediate air ducts is connected between the air inlet ducts and the air outlet ducts of the second group of condensing air ducts (j); and

    the intermediate air ducts and the cooling pipeline (i) are arranged crosswise to perform heat exchange;

    wherein a low-temperate dry air or liquid (6) before passing the air condenser (1) enters the air condenser (1) from an inlet of the cooling pipeline (i) and performs heat exchange with saturated hot air (5) coming from inside the drum (3) and entering the condensing air ducts (j) before passing through the air condenser (1), wherein the saturated hot air (5) comes from the drum (3) and enters the air condenser (1) from first air inlets (A) of the first group of condensing air ducts (j) and second air inlets (B) of the second group of condensing air ducts (j) to perform heat exchange to become unsaturated hot air (8), and the unsaturated hot air (8) is discharged from the air condenser (1) from first air outlets (C) of the first group of condensing air ducts (j) and second air outlets (D) of the second group of condensing air ducts (j) to be collected together to enter the heater (2) to be heated; wherein the air condenser (1) comprises two types of heat exchange, one of which is performed between air in the first and second groups of condensing air ducts (j) and dry air or liquid (6) in the cooling pipeline (i), the other of which is performed between air in the first group of condensing air ducts (j) and air in the second group of condensing air ducts (j).


     
    2. The air condenser (1) according to claim 1, wherein the first group of condensing air ducts (j) comprise at least one first condensing sheet (12); and the at least one first condensing sheet (12) is formed with at least the air inlet ducts and the air outlet ducts of the first group of condensing air ducts 0); the second group of condensing air ducts (j) comprise at least one second condensing sheet (13); and the at least one second condensing sheet (13) is formed with at least the air inlet ducts and the air outlet ducts of the second group of condensing air ducts (j);
    the first condensing sheet (12) and the second condensing sheet (13) are arranged at intervals, so that the air inlet ducts of the first group of condensing air ducts (j) and the air outlet ducts of the second group of condensing air ducts (j) are arranged adjacently, and projections of the air inlet ducts of the first group of condensing air ducts (j) and the air outlet ducts of the second group of condensing air ducts (j) are at least partially overlapped; and
    the air outlet ducts of the first group of condensing air ducts (j) and the air inlet ducts of the second group of condensing air ducts (j) are arranged adjacently, and projections of the air outlet ducts of the first group of condensing air ducts (j) and the air inlet ducts of the second group of condensing air ducts (j) are at least partially overlapped.
     
    3. The air condenser (1) according to claim 1, wherein the intermediate air ducts are integrally formed or separately formed with the air inlet ducts and air outlet ducts of the first group of condensing air ducts (j) and second group of condensing air ducts (j).
     
    4. The air condenser (1) according to claim 1, wherein the low-temperature dry air or liquid (6) is room temperature air.
     
    5. A clothes dryer, comprising a drum (3) and a heater (2), and an air condenser (1) according to any one of claims 1-4 is arranged in the clothes dryer;
    wherein the drum (3) is communicated with the first air inlets (A) and the second air inlets (B) of the air condenser (1), wherein the first air inlets (A) are communicated with the air inlet ducts of the first group of condensing air ducts (j), and the second air inlets (B) are communicated with the air inlet ducts of the second group of condensing air ducts (j).
     


    Ansprüche

    1. Luftkondensator (1) für einen Wäschetrockner, wobei der Wäschetrockner eine Trommel (3) und einen Erhitzer (2) umfasst, wobei der Luftkondensator (1) Kondensationsluftkanäle (j) und eine Kühlrohrleitung (i) umfasst, die kreuzförmig angeordnet sind, wobei die Kondensationsluftkanäle (j) eine erste Gruppe von Kondensationsluftkanälen (j) und eine zweite Gruppe von Kondensationsluftkanälen (j) umfassen; Lufteinlasskanäle der ersten Gruppe von Kondensationsluftkanälen (j) und Luftauslasskanäle der zweiten Gruppe von Kondensationsluftkanälen (j) zumindest teilweise in einer wärmeaustauschbaren Weise angeordnet sind; und Luftauslasskanäle der ersten Gruppe von Kondensationsluftkanälen (j) und Lufteinlasskanäle der zweiten Gruppe von Kondensationsluftkanälen (j) zumindest teilweise in einer wärmeaustauschbaren Weise angeordnet sind;
    dadurch gekennzeichnet, dass:

    die Kondensationsluftkanäle (j) Zwischenluftkanäle umfassen;

    zumindest ein Teil der Zwischenluftkanäle zwischen den Lufteinlasskanälen und den Luftauslasskanälen der ersten Gruppe von Kondensationsluftkanälen (j) verbunden ist;

    zumindest ein anderer Teil der Zwischenluftkanäle zwischen den Lufteinlasskanälen und den Luftauslasskanälen der zweiten Gruppe von Kondensationsluftkanälen (j) verbunden ist; und

    die Zwischenluftkanäle und die Kühlrohrleitungen (i) kreuzförmig angeordnet sind, um Wärmeaustausch durchzuführen;

    wobei eine niedrig temperierte Trockenluft oder Flüssigkeit (6) vor dem Durchlaufen des Luftkondensators (1) von einem Einlass der Kühlrohrleitung (i) in den Luftkondensator (1) eintritt und einen Wärmeaustausch mit gesättigter heißer Luft (5) durchführt, die aus dem Inneren der Trommel (3) kommt und in die Kondensationsluftkanäle (j) eintritt, bevor sie den Luftkondensator (1) durchläuft, wobei die gesättigte heiße Luft (5) aus der Trommel (3) kommt und von ersten Lufteinlassen (A) der ersten Gruppe von Kondensationsluftkanälen (j) und zweiten Lufteinlassen (B) der zweiten Gruppe von Kondensationsluftkanälen (j) in den Luftkondensator (1) eintritt, um Wärmeaustausch durchzuführen, um ungesättigte heiße Luft (8) zu werden, und die ungesättigte heiße Luft (8) von dem Luftkondensator (1) von ersten Luftauslassen (C) der ersten Gruppe von Kondensationsluftkanälen (j) und zweiten Luftauslassen (D) der zweiten Gruppe von Kondensationsluftkanälen (j) abgegeben wird, um zusammen gesammelt zu werden, um zum erhitzt werden in den Erhitzer (2) einzutreten; wobei der Luftkondensator (1) zwei Arten von Wärmeaustausch umfasst, wobei eine davon zwischen Luft in den ersten und zweiten Gruppen von Kondensationsluftkanälen (j) und Trockenluft oder Flüssigkeit (6) in der Kühlrohrleitung (i) durchgeführt wird, die andere davon zwischen Luft in der ersten Gruppe von Kondensationsluftkanälen (j) und Luft in der zweiten Gruppe von Kondensationsluftkanälen (j) durchgeführt wird.


     
    2. Luftkondensator (1) nach Anspruch 1, wobei die erste Gruppe von Kondensationsluftkanälen (j) zumindest eine erste Kondensationsschicht (12) umfassen; und die zumindest eine erste Kondensationsschicht (12) zumindest mit den Lufteinlasskanälen und den Luftauslasskanälen der ersten Gruppe von Kondensationsluftkanälen (j) ausgebildet ist;

    die zweite Gruppe von Kondensationsluftkanälen (j) zumindest eine zweite Kondensationsschicht (13) umfassen; und die zumindest eine zweite Kondensationsschicht (13) mit zumindest den Lufteinlasskanälen und den Luftauslasskanälen der zweiten Gruppe von Kondensationsluftkanälen (j) ausgebildet ist;

    die erste Kondensationsschicht (12) und die zweite Kondensationsschicht (13) in Intervallen angeordnet sind, so dass die Lufteinlasskanäle der ersten Gruppe von Kondensationsluftkanälen (j) und die Luftauslasskanäle der zweiten Gruppe von Kondensationsluftkanälen (j) benachbart angeordnet sind und Vorsprünge der Lufteinlasskanäle der ersten Gruppe von Kondensationsluftkanälen (j) und die Luftauslasskanäle der zweiten Gruppe von Kondensationsluftkanälen (j) sich zumindest teilweise überlappen; und

    die Luftauslasskanäle der ersten Gruppe von Kondensationsluftkanälen (j) und die Lufteinlasskanäle der zweiten Gruppe von Kondensationsluftkanälen (j) benachbart angeordnet sind, und Vorsprünge der Luftauslasskanäle der ersten Gruppe von Kondensationsluftkanälen (j) und die Lufteinlasskanäle der zweiten Gruppe von Kondensationsluftkanälen (j) sich zumindest teilweise überlappen.


     
    3. Luftkondensator (1) nach Anspruch 1, wobei die Zwischenluftkanäle mit den Lufteinlasskanälen und Luftauslasskanälen der ersten Gruppe von Kondensationsluftkanälen (j) und zweiten Gruppe von Kondensationsluftkanälen (j) einteilig ausgebildet sind oder separat ausgebildet sind.
     
    4. Luftkondensator (1) nach Anspruch 1, wobei die Niedertemperaturtrockenluft oder -flüssigkeit (6) Raumlufttemperatur ist.
     
    5. Wäschetrockner, umfassend eine Trommel (3) und einen Erhitzer (2), und ein Luftkondensator (1) nach einem der Ansprüche 1-4 ist im Wäschetrockner angeordnet;
    wobei die Trommel (3) mit den ersten Lufteinlassen (A) und den zweiten Lufteinlassen (B) des Luftkondensators (1) in Verbindung steht, wobei die ersten Lufteinlasse (A) mit den Lufteinlasskanälen der ersten Gruppe von Kondensationsluftkanälen (j) in Verbindung stehen und die zweiten Lufteinlasse (B) mit den Lufteinlasskanälen der zweiten Gruppe von Kondensationsluftkanälen (j) in Verbindung stehen.
     


    Revendications

    1. Condenseur d'air (1) pour un sèche-linge, le sèche-linge comprenant un tambour (3) et un dispositif de chauffage (2), le condenseur d'air (1) comprenant des conduites d'air de condensation (j) et un tuyau de refroidissement (i) agencés transversalement, dans lequel les conduites d'air de condensation (j) comprennent un premier groupe de conduites d'air de condensation (j) et un deuxième groupe de conduites d'air de condensation (j) ; les conduites d'entrée d'air du premier groupe de conduites d'air de condensation (j) et les conduites de sortie d'air du deuxième groupe de conduites d'air de condensation (j) sont au moins partiellement agencées de manière à pouvoir échanger la chaleur ; et les conduites de sortie d'air du premier groupe de conduites d'air de condensation (j) et les conduites d'entrée d'air du deuxième groupe de conduites d'air de condensation (j) sont au moins partiellement agencées de manière à pouvoir échanger la chaleur ;
    caractérisé en ce que :

    les conduites d'air de condensation (j) comprennent des conduites d'air intermédiaires ;

    au moins une partie des conduites d'air intermédiaires sont placées entre les conduites d'entrée d'air et les conduites de sortie d'air du premier groupe de conduites d'air de condensation (j) et reliées à celles-ci ;

    au moins une autre partie des conduites d'air intermédiaires sont placées entre les conduites d'entrée d'air et les conduites de sortie d'air du deuxième groupe de conduites d'air de condensation (j) et reliées à celles-ci ; et

    les conduites d'air intermédiaires et le tuyau de refroidissement (i) sont agencés transversalement pour effectuer un échange de chaleur ;

    dans lequel un air sec ou un liquide à basse température (6) avant le passage du condenseur d'air (1) entre dans le condenseur d'air (1) à partir d'une entrée du tuyau de refroidissement (i) et effectue un échange de chaleur avec l'air chaud saturé (5) provenant de l'intérieur du tambour (3) et entrant dans les conduites d'air de condensation (j) avant de passer à travers le condenseur d'air (1), dans lequel l'air chaud saturé (5) provient du tambour (3) et entre dans le condenseur d'air (1) à partir des premiers orifices d'entrée d'air (A) du premier groupe de conduites d'air de condensation (j) et des deuxièmes orifices d'entrée d'air (B) du deuxième groupe de conduites d'air de condensation (j) pour effectuer un échange de chaleur pour devenir de l'air chaud non saturé (8), et l'air chaud non saturé (8) est déchargé du condenseur d'air (1) à partir des premières sorties d'air (C) du premier groupe de conduites d'air de condensation (j) et des deuxièmes sorties d'air (D) du deuxième groupe de conduites d'air de condensation (j) pour être collecté pour entrer dans le dispositif de chauffage (2) pour être chauffé ; dans lequel le condenseur d'air (1) comprend deux types d'échange de chaleur, l'un d'eux étant effectué entre l'air dans les premier et deuxième groupes de conduites d'air de condensation (j) et l'air sec ou le liquide (6) dans le tuyau de refroidissement (i), l'autre étant effectué entre l'air dans le premier groupe de conduites d'air de condensation (j) et l'air dans le deuxième groupe de conduites d'air de condensation (j).


     
    2. Condenseur d'air (1) selon la revendication 1, dans lequel le premier groupe de conduites d'air de condensation (j) comprend au moins une première feuille de condensation (12) ; et ladite au moins une première feuille de condensation (12) est formée avec au moins les conduites d'entrée d'air et les conduites de sortie d'air du premier groupe de conduites d'air de condensation (j) ;
    le deuxième groupe de conduites d'air de condensation (j) comprend au moins une deuxième feuille de condensation (13) ; et ladite au moins une deuxième feuille de condensation (13) est formée avec au moins les conduites d'entrée d'air et les conduites de sortie d'air du deuxième groupe de conduites d'air de condensation (j) ;
    la première feuille de condensation (12) et la deuxième feuille de condensation (13) sont agencées à des intervalles, de sorte que les conduites d'entrée d'air du premier groupe de conduites d'air de condensation (j) et les conduites de sortie d'air du deuxième groupe de conduites d'air de condensation (j) soient agencées de manière adjacente, et que les protubérances des conduites d'entrée d'air du premier groupe de conduites d'air de condensation (j) et des conduites de sortie d'air du deuxième groupe de conduites d'air de condensation (j) soient au moins partiellement superposées ; et
    que les conduites de sortie d'air du premier groupe de conduites d'air de condensation (j) et les conduites d'entrée d'air du deuxième groupe de conduites d'air de condensation (j) soient agencées de manière adjacente, et que les protubérances des conduites de sortie d'air du premier groupe de conduites d'air de condensation (j) et des conduites d'entrée d'air du deuxième groupe de conduites d'air de condensation (j) soient au moins partiellement superposées.
     
    3. Condenseur d'air (1) selon la revendication 1, dans lequel les conduites d'air intermédiaires sont formées d'un seul tenant ou formées séparément avec les conduites d'entrée d'air et les conduites de sortie d'air du premier groupe de conduites d'air de condensation (j) et du deuxième groupe de conduites d'air de condensation (j).
     
    4. Condenseur d'air (1) selon la revendication 1, dans lequel l'air sec ou le liquide à basse température (6) est de l'air à température ambiante.
     
    5. Sèche-linge, comprenant un tambour (3) et un dispositif de chauffage (2), et un condenseur d'air (1) selon l'une quelconque des revendications 1 à 4 est agencé dans le sèche-linge ;
    dans lequel le tambour (3) est en communication avec les premiers orifices d'entrée d'air (A) et les deuxièmes orifices d'entrée d'air (B) du condenseur d'air (1), dans lequel les premiers orifices d'entrée d'air (A) sont en communication avec les conduites d'entrée d'air du premier groupe de conduites d'air de condensation (j), et les deuxièmes orifices d'entrée d'air (B) sont en communication avec les conduites d'entrée d'air du deuxième groupe de conduites d'air de condensation (j).
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description