(19)
(11)EP 3 182 035 A1

(12)EUROPEAN PATENT APPLICATION

(43)Date of publication:
21.06.2017 Bulletin 2017/25

(21)Application number: 16464012.0

(22)Date of filing:  12.12.2016
(51)International Patent Classification (IPC): 
F25B 9/00(2006.01)
F24F 5/00(2006.01)
B64D 13/08(2006.01)
B64D 13/06(2006.01)
F24F 3/044(2006.01)
B64D 13/02(2006.01)
F25B 9/06(2006.01)
(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
Designated Extension States:
BA ME
Designated Validation States:
MA MD

(30)Priority: 17.12.2015 RO 1016

(71)Applicant: Institutul National de Cercetare- Dezvoltare si Incercari pentru Electrotehnica - ICMET Craiova
200764 Craiova (RO)

(72)Inventors:
  • Teisanu, Florin
    200457 Craiova (RO)
  • Chelan, Constantin
    200618 Craiova (RO)
  • Duta, Marian
    200080 Craiova (RO)
  • Patru, Ion
    200438 Craiova (RO)

  


(54)COMPRESSED AIR COOLING EQUIPMENT AND DEVICE


(57) The invention relates to compressed air equipment and device intended for air conditioning through cooling inside rooms, or enclosures such as living spaces, work spaces or technological spaces, or the vehicle's passenger compartment.
The compressed air cooling equipment, according to the invention, operate on the basis of the thermodynamic process of compressed air expansion in a centrifugal field and turning it entirely into cold air, harmless for human beings and for the environment, and consists in an air filter for cleaning inlet free air, an air filter (2) for cleaning the air sucked from the room, two-way and two-position distributor (3), a source of compressed air (4), an air-to-air type heat exchanger (5), a microfilter (6) for cleaning vitiated air resulting from the compression process, a pressure gauge (7), a pressure relief valve (8) which opens when the pressure in the circuit reaches a preset value in the range 2.5÷4 bar, a pneumatic cooling device (9) which generates air with a temperature below the ambient, by expansion in centrifugal field, a silencer (10), an air disperser (11) for dispersing cold air in the room, a pneumatic valve (12) for pressure relieving inside the room and a microprocessor command module (13).




Description


[0001] The invention relates to a dedicated cooling equipment to ensure thermal and physiological comfort inside rooms (enclosures) such as: living space, work space, technological space, the vehicle's passenger compartment.

[0002] The equipment with halogenated refrigerants (chlorofluorocarbon products) is used for cooling enclosures, and consists in: engine, refrigerating compressor, condenser, drain valve, vaporizer etc. This equipment has good cooling efficiency, however, since it uses chlorofluorocarbon products, it is causing serious problems for the environment.

[0003] Compressed air cooling equipment is used as well for the background of the invention. Its operation is based on a vortex energy separation effect, known as the Rangue-Hilsch effect. The drawback of such equipment is that it simultaneously generates both cold air and hot air, and only one of the fractions is generally used in applications, while the other fraction is dissipated into the atmosphere.

[0004] The problem solved by this invention is the processing of the entire quantity of compressed air, by a pneumatic device, resulting cold air at a temperature below ambient and its use in air conditioning through cooling inside a room/enclosure.

[0005] The operation of the invention is based on the thermodynamic process of compressed air expansion in a centrifugal field and turning it into cold air, harmless for human beings and for the environment.

[0006] The equipment according to the invention eliminates the disadvantages mentioned in that it is composed of a free air suction filter, another suction filter for the air inside the room, two-way and two-position distributor, a turbo-blower or electric air compressor type of source of compressed air, an air-to-air type heat exchanger, a microfilter, a pressure gauge, a pressure relief valve, a pneumatic cooling device based on the thermodynamic effect of expansion in a centrifugal field, silencer, an air disperser, a relief valve for the pressure relief inside the room/enclosure subjected to cooling, a microprocessor module for control.

[0007] The equipment intended for cooling of a room (enclosure) according to the proposed technical solution has the following advantages:
  • it turns all compressed air into cold air;
  • it provides recirculation of the air in the passenger compartment or inlet of fresh-air and removal of stale air;
  • it promotes green technology for the environment, personal health and life;


[0008] Below is an example for the achievement of:

Fig. 1 Compressed air cooling equipment

Fig. 2a Pneumatic cooling device

Fig. 2b Multi-jet injector with axial swirl chamber

Fig. 2c Multi-jet injector with frontal swirl chamber



[0009] According to the invention, the equipment, schematized in Figure 1, is comprised of an air filter (1) for cleaning inlet free air, another air filter (2) for cleaning the air sucked from the room, two-way and two-position distributor (3) for switching between indoor air and free air inlet circuit, a turbo-blower or electric air compressor type of source of compressed air (4) for generating low-pressure 2.5÷4 bar air, whose cyclic operation is controlled by a microprocessor command module (13), an air-to-air type heat exchanger (5) for removal of heat resulting from air compression, a microfilter (6) for cleaning vitiated air resulting from the compression process, a pressure gauge (7) for viewing circuit pressure value, a pressure relief valve (8) which opens when the pressure in the circuit reaches a preset value in the range 2.5÷4 bar, a pneumatic cooling device (9) built with no moving parts where sudden drop in compressed air pressure and an implicit decrease in temperature is caused by the expansion in centrifugal field; a silencer (10) for noise reduction caused by the sudden drop in pressure in the circuit; an air disperser (11) for dispersing cold air in the room; a relief valve (12) which opens automatically and performs purging in the atmosphere only when the pressure in the room reaches a preset threshold value from safety and physiological comfort conditions, a microprocessor command module (13).

[0010] The operation of the compressed air source (4) in automatic cycles depending on room temperature and time, as well as the position of the distributor (3) is provided by a known microprocessor command module (13).

[0011] Position a-c/open; b/closed, of the distributor (3) allows the installation to process the air inside the room (recirculated air) through cooling, and the position a/closed; b-c/open allows free air (fresh air) processing through cooling.

[0012] The pneumatic cooling device (9), as it is represented in fig. 2a, fig. 2b, fig. 2c, for expansion and centrifuging of compressed air (swirling) is built with no moving parts, respectively the device unit (9.1), a multi-jet injector (9.2), a cap (9.3) and a gasket (9.4). The multi-jet type injector (9.2), shown in fig. 2b or fig. 2c is fitted with a number of nozzle type holes arranged tangentially to the swirl chamber diameter, in order to divide the incident flow of compressed air, to atomize it and turn it into spray and also reduce the noise resulting from the centrifugal expansion.

[0013] The design of the multi-jet injector (9.2) can be achieved with axial swirl chamber as in fig. 2b, or with frontal swirl chamber as in fig. 2c.

Bibliography



[0014] 
  1. 1. Patent RO 122506 B1/2009
  2. 2. Patent RO 95442/1988
  3. 3. Vsevolod Radcenco - Vortex generators for cold and heat. Tehnica Publishing House, Bucharest, 1990.



Claims

1. The compressed air cooling equipment characterized by that - in order to ensure thermal and physiological comfort inside living spaces, work spaces, technological spaces, the vehicle's passenger compartment, consists in an air filter (1) for cleaning inlet free air; an air filter (2) for cleaning the air sucked from the room; two-way and two-step distributor (3); a source of compressed air (4); an air-to-air type heat exchanger (5); a microfilter (6) for cleaning vitiated air resulting from the compression process; a pressure gauge (7) ; a pressure relief valve (8) which opens when the pressure in the circuit reaches a preset value in the range 2.5÷4 bar; a pneumatic cooling device (9) generating cold air by expansion in centrifugal field; a silencer (10); an air disperser (11) for dispersing cold air in the room; a pneumatic valve (12) for pressure relieving inside the room; a microprocessor command module (13)
 
2. The compressed air cooling equipment according to requirement no.1, characterized by that - in order to turn all compressed air into cold air with the temperature below ambient, is equipped with a pneumatic cooling device (9), built with no moving parts, respectively the device unit (9.1), a multi-jet injector (9.2), a cap (9.3) and a gasket (9.4). The multi-jet type injector (9.2), is achieved with an axial swirl chamber or frontal swirl chamber and has a number of nozzle type holes arranged tangentially to the swirl chamber diameter.
 




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Search report




Cited references

REFERENCES CITED IN THE DESCRIPTION



This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

Patent documents cited in the description




Non-patent literature cited in the description