SURFACE CLEANING DEVICE AND CONCENTRATED STEAM SHOT ACCESSORY FOR SURFACE CLEANING DEVICE

Abstract

 A surface cleaning device, and a concentrated steam shot accessory (20) for a surface cleaning device. The concentrated steam shot accessory (20) has a steam inlet (207) connected to a steam supply interface (107) of the surface cleaning device, wherein the concentrated steam shot accessory (20) comprises: a shot accessory housing (21), the rear end of which is connected to a main body (10) of the surface cleaning device; and a steam concentrating channel member, provided inside the shot accessory housing (21) and having a channel extending along a linear channel axis, wherein the front end of the channel forms a steam outlet (208), the rear end of the channel forms the steam inlet (207), and the channel further comprises a tapered hole section located between the steam inlet (207) and a steam outlet (208) and tapered towards the steam outlet (208).

Description

Technical Field

[0001] The present invention relates to the technical field of surface cleaning devices, and in particular, to a concentrated steam shot accessory for a surface cleaning device, and a surface cleaning device.

Background

[0002] A surface cleaning device is suitable for cleaning hard surfaces such as tiles and hardwood, and soft surfaces such as carpets and upholsteries. A surface cleaning device for cleaning soft surfaces, such as a portable deep cleaner (PDC), can be used to clean various fabric products, such as sofas, curtains, mattresses, carpets, etc. Generally, such a surface cleaning device itself has a steam mode and a hot water mode. In the steam mode, steam is shot onto the surface of the fabric by an accessory, thereby achieving functions such as sterilization, disinfection and cleaning.

[0003] Known surface cleaning devices often have a steam brush head with a plurality of steam shot holes, and surface cleaning is achieved only by the dissolving effect of steam retained in the cleaning chamber, which is only suitable for cleaning of soft surfaces such as fabrics, etc. and has a single function. Consequently, it is difficult to use steam to remove stubborn stains such as oil stains attached to hard surfaces such as tiles, cement and other kitchen surfaces.

Summary

[0004] In view of the described deficiencies in the prior art, the present invention provides a concentrated steam shot accessory for a surface cleaning device and a surface cleaning device having same, which can remove stubborn stains such as oil stains attached to e.g. hard surfaces by using steam.

[0005] To achieve the described object, the present invention provides the following technical solutions:

[0006] According to one aspect of the present invention, a concentrated steam shot accessory for a surface cleaning device includes a steam inlet connected to a steam supply interface of the surface cleaning device. The concentrated steam shot accessory includes a shot accessory housing, the rear end of which is connected to a main body of the surface cleaning device, and a steam concentrating channel member, provided inside the shot accessory housing with a channel that extends along a linear channel axis. The front end of the channel forms a steam outlet, the rear end of the channel forms the steam inlet, and the channel further includes a tapered hole section located between the steam inlet and the steam outlet and tapered toward the steam outlet. The concentrated steam shot accessory is configured such that the steam outlet faces toward a to-be-cleaned surface in an unobstructed manner along a shooting direction.

[0007] According to another aspect of the present invention, an accessory for a surface cleaning device includes a steam inlet connected to a steam supply interface of the surface cleaning device. A shot accessory housing that has a rear end is connected to a main body of the surface cleaning device. A steam concentrating channel member is provided inside the shot accessory housing. The steam concentrating channel member includes a channel that extends along a linear channel axis. A front end of the channel forms a steam outlet and a rear end of the channel forms the steam inlet. A tapered hole section is located between the steam inlet and the steam outlet and is tapered toward the steam outlet. The accessory is configured such that the steam outlet faces a to-be-cleaned surface in an unobstructed manner along a shooting direction.

[0008] According to still another aspect of the present invention, a surface cleaning device includes a main body with a cleaning solution supply tank, a recovery tank, and a steam generating device that is connected to the cleaning solution supply tank. A hose is connected to the recovery tank and a wand is connected to the hose. A steam supply pipe is provided in the hose and the wand. A first end of the steam supply pipe is connected to the steam generating device. A steam supply interface is connected to a second end of the steam supply pipe. A shot accessory housing with a rear end is connected to a main body of the surface cleaning device. A steam concentrating channel member is provided inside the shot accessory housing and includes a channel that extends along a linear channel axis. A front end of the channel forms a steam outlet and a rear end of the channel forms a steam inlet. A tapered hole section is located between the steam inlet and the steam outlet and is tapered toward the steam outlet. The steam outlet faces a to-be-cleaned surface in an unobstructed manner along a shooting direction.

Brief Description of the Drawings

[0009] 

Fig. 1 is a top perspective view of a three-dimensional structure of a surface cleaning device according to an embodiment of the present disclosure;

Fig. 2a is a side elevational view of the structure of a concentrated steam shot accessory according to an embodiment of the present disclosure, which shows connection to a wand and a hose of a surface cleaning device;

Fig. 2b is a side elevational view with a partial cross-section of the structure of the concentrated steam shot accessory of Fig. 2a, which shows connection to a wand and a hose of a surface cleaning device;

Fig. 2c is an enlarged side elevational cross-section view of a portion of the structure of part A of the concentrated steam shot accessory of Fig. 2b;

Fig. 3a is a side perspective view of a three-dimensional structure of a concentrated steam shot accessory according to an embodiment of the present disclosure;

Fig. 3b is a side perspective cross-sectional view of a three-dimensional sectional structure of the concentrated steam shot accessory of Fig. 3a;

Fig. 3c is a side elevational cross-section view of the structure of the concentrated steam shot accessory of Fig. 3a;

Fig. 4a is a side perspective view of a three-dimensional structure of a concentrated steam shot accessory according to an embodiment of the present disclosure, which shows that the concentrated steam shot accessory is further provided with a circular brush accessory.

Fig. 4b is a side perspective view of a three-dimensional structure of a concentrated steam shot accessory according to an embodiment of the present disclosure, which shows that the concentrated steam shot accessory is further provided with a rectangular brush accessory.

Fig. 4c is a side perspective view of a three-dimensional structure of a concentrated steam shot accessory according to an embodiment of the present disclosure, which shows that the concentrated steam shot accessory is further provided with a shovel-like brush accessory.

Fig. 5 is a side elevational cross-sectional view of a steam brush head of a surface cleaning device in the prior art.

[0010] In the drawings:

10 - main body; 101 - cleaning solution supply tank; 102 - solution recovery tank; 104 - hose; 105 - wand; 105a - locking button; 106 - steam supply pipe; 107 - steam supply interface;

20 - concentrated steam shot accessory; 207 - steam inlet; 208 - steam outlet; 21 - shot accessory housing; 21a - button aperture; 21b - guide groove; 21c - protruding ribbing; 211 - front end aperture; 212 - vent; 213 - stop portion; 22 - channel member main body; 221 - extension section; 221a - first extension section; 221b - second extension section; 223 - abutting portion; 224 - connection flange; 225 - connecting screw; 226 - first tapered hole; 23 - nozzle; 231 - nozzle flange; 236 - second tapered hole; 24 - sealing ring; 24a - first sealing ring; 24b - second sealing ring; 26 - circular brush accessory; 27 - rectangular brush accessory; 28 - shovel - like accessory;

30 - steam chamber cleaning accessory;

3' - cleaning channel; 4' - dust removal channel; 13' - return channel; 15' - cleaning chamber.

Detailed Description

[0011] Hereinafter, the technical solutions in the present disclosure will be clearly and completely described in combination with embodiments and accompanying drawings. Obviously, the embodiments as described are only parts of embodiments rather than all the embodiments of the present disclosure. On the basis of the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without any inventive effort shall all fall within the scope of protection of the present disclosure.

[0012] Fig. 1 illustrates a schematic diagram of a three-dimensional structure of a surface cleaning device according to an embodiment of the present disclosure. In the present embodiment, the surface cleaning device is a portable deep cleaner, and includes a main body 10, the main body 10 includes: a cleaning solution supply tank 101; a recovery tank 102; a steam generating device (not shown), connected to the cleaning solution supply tank 101; a hose 104, connected to the recovery tank 102; a wand 105, connected to the hose 104; and a steam supply pipe 106, provided in the hose 104 and the wand 105, wherein a first end of the steam supply pipe is connected to the steam generating device; and a steam supply interface 107, connected to a second end of the steam supply pipe 106.

[0013] As can be seen from Fig. 1, the surface cleaning device may be equipped with different cleaning accessories (e.g. two steam chamber cleaning accessories 30 of different shapes or specifications), and one concentrated steam shot accessory 20. The surface cleaning device may have different operating modes, such as a water spraying cleaning mode, a steam cleaning mode, a steam disinfection mode, etc. A user may selectively mount different cleaning accessories at an end of the wand 105 according to different needs and cleaning modes.

[0014] With reference to Figs. 2a, 2b, and 2c, these views represent various structures of a concentrated steam shot accessory according to embodiments of the present disclosure, which shows connection to a wand and a hose of a surface cleaning device. Fig. 2b illustrates a sectional structure of the concentrated steam shot accessory of Fig. 2a. Fig. 2c illustrates a partially enlarged structure of part A of the concentrated steam shot accessory of Fig. 2b. It can be seen that a locking button 105a is provided on the wand 105; and a button aperture 21a in cooperation with the locking button 105a is provided on a shot accessory housing 21 of the concentrated steam shot accessory 20. By the cooperation between the locking button 105a on the wand 105 and the button aperture 21a on the shot accessory housing 21, the steam shot accessory 20 can be conveniently connected to and released from the main body 10 of the cleaning device.

[0015] Likewise, locking buttons are also provided on other cleaning accessories, such as the steam chamber cleaning accessories 30 which are selectively mounted, to facilitate connection to the wand of the main body 10 of the surface cleaning device.

[0016] With reference to Figs. 3a, 3b and 3c, Fig. 3a illustrates a three-dimensional structure of a concentrated steam shot accessory according to the present disclosure; Fig. 3b illustrates a three-dimensional sectional structure of the concentrated steam shot accessory of Fig. 3a; and Fig. 3c illustrates a front view sectional structure of the concentrated steam shot accessory of Fig. 3a.

[0017] In the illustrated configurations shown in Figs. 3a-3c, the concentrated steam shot accessory 20 has a steam inlet 207 connected to the steam supply interface 107 of the surface cleaning device; wherein the concentrated steam shot accessory 20 includes: a shot accessory housing 21, a rear end of which is connected to the wand 105 of the main body 10 of the surface cleaning device; and a steam concentrating channel member, provided inside the shot accessory housing 21. In this configuration, the steam concentrating channel member is an overmolded integrated member, and includes a channel member main body 22 and a single nozzle 23 provided in the front end of the channel member main body 22, the nozzle 23 being made of metal.

[0018] As set forth herein, the steam concentrating channel member has a single channel extending along a linear channel axis, the front end of the channel forms a steam outlet 208,and the rear end of the channel forms the steam inlet 207; the nozzle 23 is provided at the front end of the channel along the channel axis and forms a steam outlet 208 located on the nozzle 23; and a tapered hole section tapered towards the steam outlet 208 is formed between the steam inlet 207 and the steam outlet 208 which is located on the nozzle 23. Wherein the concentrated steam shot accessory 20 is configured such that the steam outlet 208 faces towards a to-be-cleaned surface in an unobstructed manner along a shooting direction. In case a contact-type auxiliary cleaning accessory (hereinafter mentioned) which is selectively connected is mounted, the state of unobstructed manner is not strictly required.

[0019] In the present disclosure, because of the tapered hole section of the steam concentrating channel member, the steam can be accelerated, so that the steam shot out from the steam outlet 208 has a higher shooting speed; in addition, as a single nozzle and a single channel are used, the steam can be better concentrated, and the shooting use of the steam is stronger. Therefore, the concentrated steam shot accessory 20 of the present invention can not only dissolve stains by using the temperature of the steam, but also can remove the stains by using the flushing effect due to shooting of the steam, thereby being able to remove stubborn stains such as oil stains attached to, for example, hard surfaces. Accordingly, the concentrated steam shot accessory of the present invention may extend the steam function of the surface cleaning device to more use cases, such as a cooking hob and cleaning oil stains on kitchen hood.

[0020] The channel member main body may be formed of a plastic member. There is a high difficulty in directly forming a steam shooting hole (i.e. the steam outlet 208, having a diameter of about 0.8 mm) in the plastic member. Moreover, when used at the high temperature of the steam, the plastic steam channel may be deformed, thereby affecting the steam shooting. In this embodiment of the present disclosure, after the metal nozzle (which is resistant to high temperature and is not easy to deform) is embedded in the front end of the steam channel, the steam shooting hole is formed in the metal nozzle, facilitating formation of the steam shooting hole and stable shooting of steam.

[0021] The nozzle 23 being made of metal can facilitate machining and forming of the steam outlet 208 located on the nozzle 23, and the steam outlet 208 will not be deformed under the effect of high temperature of the steam when the steam is shot, thereby possibly ensuring the stability of the steam shooting operation.

[0022] With reference to Figs. 2c and 3c, a nozzle flange 231 extending in a radial direction and embedded in the channel member main body 22 is formed on the nozzle 23.

[0023] By forming the nozzle flange 231 on the nozzle 23, the nozzle 23 and the channel member main body 22 can be better bonded together to prevent the nozzle 23 from falling off.

[0024] A first tapered hole 226 is formed in the channel member main body 22, a second tapered hole 236 is formed in the nozzle 23, the first tapered hole 226 is connected to the second tapered hole 236 along the channel axis, and the steam outlet 208 is formed at the front end of the second tapered hole 236, wherein the tapered angle of the second tapered hole 236 is greater than that of the first tapered hole 226.

[0025] By forming the second tapered hole 236 in the nozzle 23 and enabling the tapered angle of the second tapered hole 236 to be greater than that of the first tapered hole 226 located at the rear side, steam can be further concentrated and accelerated.

[0026] With reference to Figs. 2c and 3b, a connection protruding column is provided inside the shot accessory housing 21, the rear end of the channel member main body 22 forms a connection flange 224, and the connection flange 224 is connected to the connection protruding column by a connecting screw 225.

[0027] Because of the connection between the connection flange 224 and the connection protruding column, it can be ensured that the steam concentrating channel member is reliably connected to the shot accessory housing 21.

[0028] As illustrated herein, a stop portion 213 is formed inside the front end of the shot accessory housing 21, and the front end of the channel member main body 22 forms an abutting portion 223 that abuts against the stop portion 213.

[0029] Due to the cooperation between the stop portion 213 and the abutting portion 223, it can be further ensured that the steam concentrating channel member is stably mounted in the shot accessory housing 21.

[0030] Referring again to Fig. 2c, a front end aperture 211 is formed at the front end of the shot accessory housing 21, and the channel member main body 22 includes an extension section 221 that extends forward from the abutting portion 223 and passes through the front end aperture 211; the concentrated steam shot accessory 20 further includes a contact-type auxiliary cleaning accessory which is selectively connected, wherein the contact-type auxiliary cleaning accessory has a connecting sleeve on the extension section 221 of the channel member main body 22; and the contact-type auxiliary cleaning accessory includes at least one of a circular brush accessory 26, a rectangular brush accessory 27, and a shovel-like accessory 28. With reference to Figs. 4a, 4b, and 4c, the illustrated configurations respectively show instances that a circular brush accessory 26, a rectangular brush accessory 27, and a shovel-like accessory 28 are further provided on the concentrated steam shot accessory.

[0031] When the effect of dissolving and flushing stubborn stains such as oil stains by steam is not ideal, further by the action of an external force of the contact-type auxiliary cleaning accessory such as a brush accessory or a shovel-like accessory, the stains on the to-be-cleaned surface can be loosened and separated from the to-be-cleaned surface as far as possible, and the stains can be more easily dissolved and removed under the action of the steam, thereby being able to achieve a better effect of removing stains. In order to achieve the connection of the contact-type auxiliary cleaning accessory, in a specific implementation, an L-shaped notch can be provided on the connecting sleeve of the contact-type auxiliary cleaning accessory, and a protruding column extending radially is provided on the extension section of the channel member main body 22, so as to achieve rotational locking by cooperation between the protruding column and the L-shaped notch.

[0032] The extension section 221 includes a first extension section 221a and a second extension section 221b extending forward from the first extension section, the diameter of the second extension section 221b being less than that of the first extension section 221a.

[0033] A sealing ring assembly 24 is provided on the outer surface of the extension section 211, and the sealing ring assembly 24 includes a first sealing ring 24a provided on the first extension section 221a and a second sealing ring 24b provided on the second extension section 221b.

[0034] By providing the first extension section 221a and the second extension section 221b having different diameters and the first sealing ring 24a and the second sealing ring 24b provided therein, other cleaning accessories can be connected to the concentrated steam shot accessory 20 more conveniently and more stably.

[0035] Referring to Figs. 2b, 2c, and 3a, a vent 212 is formed on the shot accessory housing 21, such that the interior of the hose 104 is in communication with the external environment through the vent 212.

[0036] The surface cleaning device has an operating mode using a negative pressure suction; after the concentrated steam shot accessory has been mounted, if a user accidentally selects the operating mode of the surface cleaning device as an operating mode having a negative pressure suction, a suction motor will operate in an anomalous state with increased heat generation in the case of being unable to achieve ventilation, thereby causing safety risks. The vent on the shot accessory housing can ensure ventilation between the hose and the external environment, effectively avoiding safety risks caused by improper selection of operating modes.

[0037] With reference now to Fig. 3a, strip-shaped protruding ribbings 21c can also be further provided on the outer surface of the shot accessory housing 21, and guide groove 21b can also be further provided on the inner surface of the shot accessory housing 21, so that the user can connect the concentrated steam shot accessory 20 to the wand 105 or remove same from the wand 105 along the guide groove 21b.

[0038] Obviously, a person skilled in the art could make various modifications and variations to the present invention without departing from the scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims and the equivalent technologies thereof, the present invention is also intended to include these modifications and variations.

[0039] In the present disclosure, because of the tapered hole section of the steam concentrating channel member, the steam can be accelerated, so that the steam shot out from the steam outlet has a higher shooting speed; therefore, not only can stains be dissolved by using the temperature of the steam, but also the stains can be removed by using the flushing effect due to shooting of the steam, thereby being able to remove stubborn stains such as oil stains attached to, e.g. hard surfaces.

[0040] Preferably, the steam concentrating channel member is an overmolded integrated member, and includes a channel member main body and a single nozzle provided in the front end of the channel member main body along the channel axis, the nozzle being made of metal.

[0041] The nozzle being made of metal can facilitate machining and forming of the steam outlet located on the nozzle, and the steam outlet will not be deformed under the effect of high temperature of the steam when the steam is shot, thereby possibly ensuring the stability of the steam shooting operation.

[0042] Preferably, a nozzle flange extending in a radial direction and embedded in the channel member main body is formed on the nozzle.

[0043] By forming the nozzle flange on the nozzle, the nozzle and the channel member main body can be better bonded together to prevent the nozzle from falling off.

[0044] Preferably a first tapered hole is formed in the channel member main body, a second tapered hole is formed in the nozzle, the first tapered hole and the second tapered hole is are connected along the channel axis to form the tapered hole section, and the steam outlet is formed at the front end of the second tapered hole, wherein the tapered angle of the second tapered hole is greater than that of the first tapered hole.

[0045] By forming the second tapered hole in the nozzle and enabling the tapered angle of the second tapered hole to be greater than that of the first tapered hole located at the rear side, steam can be further concentrated and accelerated.

[0046] Preferably a connection protruding column is provided inside the shot accessory housing, the rear end of the channel member main body forms a connection flange, and the connection flange is connected to the connection protruding column by a connecting screw.

[0047] Due to the connection between the connection flange and the connection protruding column, it can be ensured that the steam concentrating channel member is reliably connected to the shot accessory housing.

[0048] Preferably a stop portion is formed inside the front end of the shot accessory housing, and the front end of the channel member main body forms an abutting portion abutting against the stop portion.

[0049] Due to the cooperation between the stop portion and the abutting portion, it can be further ensured that the steam concentrating channel member is stably mounted in the shot accessory housing.

[0050] Preferably a front end aperture is formed at the front end of the shot accessory housing, and the channel member main body includes an extension section extending forward from the abutting portion and passing through the front end aperture; the concentrated steam shot accessory further includes a contact-type auxiliary cleaning accessory which is selectively connected, wherein the contact-type auxiliary cleaning accessory has a connecting sleeve sleeved on the extension section of the channel member main body, and the contact-type auxiliary cleaning accessory includes at least one of a circular brush accessory, a rectangular brush accessory and a shovel-like accessory.

[0051] Providing the extension section can facilitate further connection of the contact-type auxiliary cleaning accessory to the concentrated steam shot accessory, so as to achieve a better cleaning effect.

[0052] Preferably the extension section includes a first extension section and a second extension section that extends forward from the first extension section. The diameter of the second extension section is less than that of the first extension section.

[0053] A sealing ring may be provided on the outer surface of the extension section, and the sealing ring includes a first sealing ring provided on the first extension section and a second sealing ring provided on the second extension section.

[0054] By providing the first extension section and the second extension section having different diameters and the first sealing ring and the second sealing ring provided therein, other cleaning accessories can be connected to the concentrated steam shot accessory more conveniently and more stably.

[0055] According to another aspect the present invention provides a surface cleaning device, including: a main body, having a steam supply interface; and the concentrated steam shot accessory according to any one above.

[0056] By using the concentrated steam shot accessory, the surface cleaning device can not only dissolve stains by using the temperature of the steam, but also can remove stains by using the flushing effect due to shooting of the steam, thereby being able to remove stubborn stains such as oil stains attached to, e.g. hard surfaces.

[0057] As set forth herein, the main body may include: a cleaning solution supply tank; a recovery tank; a steam generating device, connected to the cleaning solution supply tank; a hose, connected to the recovery tank; a wand, connected to the hose; and a steam supply pipe, provided in the hose and the wand, wherein a first end of the steam supply pipe is connected to the steam generating device; and a steam supply interface, connected to a second end of the steam supply pipe, wherein the wand is provided with a locking button; and wherein a button aperture in cooperation with the locking button is provided on a shot accessory housing of the concentrated steam shot accessory.

[0058] By the cooperation between the locking button on the wand and the button aperture on the shot accessory housing, the steam shot accessory can be conveniently connected to and released from the main body of the cleaning device.

[0059] Preferably a vent is formed on the shot accessory housing, such that the interior of the hose is in communication with the external environment through the vent.

[0060] The surface cleaning device has an operating mode using a negative pressure suction; after the concentrated steam shot accessory has been mounted, if a user accidentally selects the operating mode of the surface cleaning device as an operating mode having a negative pressure suction, a suction motor will operate in an anomalous state with increased heat generation in the case of being unable to achieve ventilation, thereby causing safety risks. The vent on the shot accessory housing can ensure ventilation between the hose and the external environment, effectively avoiding safety risks caused by improper selection of operating modes.

[0061] Preferably the surface cleaning device further includes a steam chamber cleaning accessory, one of the steam chamber cleaning accessory and the concentrated steam shot accessory is selectively connected to the wand of the main body of the surface cleaning device.

[0062] By selecting to mount different accessories, the surface cleaning device can be used for different cleaning purposes, thereby realizing a plurality of cleaning functions.

Claims

1. A concentrated steam shot accessory (20) for a surface cleaning device, the concentrated steam shot accessory having a steam inlet (207) connected to a steam supply interface (107) of the surface cleaning device, wherein the concentrated steam shot accessory (20) comprises:

a shot accessory housing (21), a rear end of which is connected to a main body (10) of the surface cleaning device; and

a steam concentrating channel member provided inside the shot accessory housing (21) and having a channel extending along a linear channel axis, wherein a front end of the channel forms a steam outlet (208) and a rear end of the channel forms the steam inlet (207);

a tapered hole section located between the steam inlet (207) and the steam outlet (208) and tapered towards the steam outlet (208), wherein the concentrated steam shot accessory (20) is configured such that the steam outlet (208) faces a to-be-cleaned surface in an unobstructed manner along a shooting direction.

2. The concentrated steam shot accessory (20) of claim 1, wherein the steam concentrating channel member is an overmolded integrated member including a channel member main body (22) and a single nozzle (23) provided in the front end of the channel along the linear channel axis.

3. The concentrated steam shot accessory (20) of claim 2, wherein the single nozzle (23) is made of metal.

4. The concentrated steam shot accessory (20) of either one of claims 2 or 3, further comprising:
a nozzle flange (231) extending in a radial direction and embedded in the channel member main body (22).

5. The concentrated steam shot accessory (20) of any one of claims 2-4, further comprising:

a first tapered hole (226) formed in the channel member main body (22); and

a second tapered hole (236) formed in the single nozzle (23), wherein the first tapered hole (226) and the second tapered hole (236) are connected along the linear channel axis.

6. The concentrated steam shot accessory (20) of claim 5, wherein the steam outlet (208) is formed at a front end of the second tapered hole (236), and wherein a tapered angle of the second tapered hole (236) is greater than a tapered angle of the first tapered hole (226).

7. The concentrated steam shot accessory (20) of any one of claims 2-6, further comprising:
a connection protruding column provided inside the shot accessory housing (21).

8. The concentrated steam shot accessory (20) of claim 7, wherein a rear end of the channel member main body (22) forms a connection flange (224), the connection flange (224) being connected to the connection protruding column by a connecting screw (225).

9. The concentrated steam shot accessory (20) of any one of claims 2-8, further comprising:
a stop portion (213) formed inside a front end of the shot accessory housing (21).

10. The concentrated steam shot accessory (20) of claim 9, wherein a front end of the channel member main body (22) forms an abutting portion (223) that abuts the stop portion (213).

11. The concentrated steam shot accessory (20) of claim 10, further comprising:
a front end aperture (211) formed at the front end of the shot accessory housing (21), wherein the channel member main body (22) includes an extension section (221) that extends forward from the abutting portion (223) and passes through the front end aperture (211).

12. The concentrated steam shot accessory (20) of claim 11, further comprising:
a contact-type auxiliary cleaning accessory which is selectively connected, wherein the contact-type auxiliary cleaning accessory has a connecting sleeve on the extension section (221) of the channel member main body (22).

13. The concentrated steam shot accessory (20) of claim 12, wherein the contact-type auxiliary cleaning accessory includes at least one of a circular brush accessory (26), a rectangular brush accessory (27), and a shovel-like accessory (28).

14. The concentrated steam shot accessory (20) of claim 13, wherein the extension section (221) includes a first extension section (221a) and a second extension section (221b), the second extension section (221b) extending forward from the first extension section (221a), and wherein a diameter of the second extension section (221b) is less than a diameter of the first extension section (221a).

15. The concentrated steam shot accessory (20) of claim 14, further comprising:
a sealing ring assembly (24) provided on an outer surface of the extension section (211), the sealing ring assembly (24) including a first sealing ring (24a) provided on the first extension section (221a) and a second sealing ring (24b) provided on the second extension section (221b).

Drawing