CN215251777U

CN215251777U - Hanging clothing self-cleaning machine

Info

Publication number: CN215251777U
Application number: CN202120246978.1U
Authority: CN
Inventors: 王世宇
Original assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd; Guangzhou Yijia Intelligent Electronic Technology Co Ltd
Current assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd; Guangzhou Yijia Intelligent Electronic Technology Co Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-12-21
Anticipated expiration: 2031-01-28

Abstract

The utility model relates to a hanging type automatic clothes cleaning machine, which comprises a machine body, a hot air system, a washing water system, a lifting spray head and a control device; the machine body comprises a shell, an inner container and a door body; the hot air system is used for introducing hot air into the inner container; the washing water system is used for introducing washing water into the inner container; the lifting spray head assembly comprises a folding connecting pipe, a movable spray head and a driving device; a through washing water channel is formed in the folding connecting pipe; the driving device is used for driving the movable spray head to reciprocate along the height direction of the hanging type automatic clothes washing machine. The clothes to be cleaned are hung on the clothes hanger and placed in the inner container in a suspended mode, the clothes are washed by high-pressure water flow generated by the liftable movable spray head, the purpose of cleaning the clothes is achieved, the clothes are prevented from being in contact with structural members of equipment, secondary pollution can be effectively avoided, and the requirement for use in public places is met.

Description

Hanging clothing self-cleaning machine

Technical Field

The utility model relates to a clothing cleaning equipment technical field especially relates to a hanging clothing automatic cleaning machine.

Background

In people's daily life, like public places such as gymnasiums, hotels, etc., there is the demand that the light and thin clothing that sweat is wet or slightly dirty need be washed and dried to make things convenient for people's life, go on a journey, present washing machine utilizes the electric energy to produce the mechanical action and wash the clothing, common are cylinder and impeller washing machine, drive the clothing through the rotation of inner tube and impeller and whip, rub in aqueous, rely on mechanical force to wash the clothing, because the clothing contacts with the structure and soaks and have cross infection's potential risk and hidden danger in the washing water, accord with the demand of the modern laundry household electrical appliances to intelligence, health, be restricted by the structure of the product in the past at the same time, it is difficult to reach new user demand to the speed of drying and washing.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims to provide a hanging clothing self-cleaning machine, it has simple structure, washs the effectual and difficult advantage that causes the clothing damage of drying.

A hanging type automatic clothes cleaning machine comprises a machine body, a hot air system, a washing water system, a lifting spray head and a control device;

the machine body comprises a shell, an inner container and a door body, wherein the inner container is arranged in the shell; the inner container and the shell are both provided with placing openings, and the movable door body cover is arranged at the placing openings; the hot air system is used for introducing hot air into the inner container; the washing water system is used for introducing washing water into the inner container;

the lifting spray head comprises a folding connecting pipe, a movable spray head and a driving device; a through washing water channel is formed inside the folding connecting pipe, and the washing water channel is communicated with the washing water system; the folding connecting pipe comprises a first end fixed at the top of the inner container and a second end arranged in a hanging way, and the movable spray head is fixed at the second end and communicated with the washing water channel; the driving device is fixedly connected with the second end and is used for driving the movable spray head to reciprocate along the height direction of the hanging type automatic clothes washing machine;

the control device is electrically connected with the hot air system, the washing water system and the driving device respectively and controls the on or off of the hot air system, the washing water system and the driving device.

The embodiment of the utility model provides a hanging clothing automatic cleaning machine, it is through the setting of washing water system and the lift shower nozzle, the clothing that waits to wash hangs in the inner bag, through the lift shower nozzle with the high-pressure rivers injection that the washing water system produced to the clothing surface, reach the purpose of clean clothing, and avoided the clothing and the contact of the structure of equipment, can effectively avoid secondary pollution, satisfy the demand that uses in public occasion; in addition, the lifting spray head assembly and the control device are arranged, the driving device is controlled to be opened or closed through program setting, and then the height of the movable spray head is adjusted, so that the specific part of the clothes can be intensively cleaned while the integral cleaning purpose of the clothes is realized, and the cleaning effect is effectively improved; simultaneously, the clothing is the nature state of hanging in washing drying process, has avoided utilizing among the prior art drum type washing machine and rotary drum type washing machine to wash when rotating, whipping the in-process because between clothing and the equipment structure and between clothing and the clothing physical contact that produces and then cause the problem of clothing damage, combines suspension type clothing washing drying machine washing and drying integral type sets up, directly utilizes hot air system to let in the hot-air after wasing and dries, realizes quick drying, and avoids the clothing to appear entangling the phenomenon, effectively avoids the clothing fold or warp, saves follow-up nursing operation, adapts to most people and washs the demand of drying fast to a small amount of clothing.

For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a perspective view of an automatic hanging clothes washing machine according to embodiment 1 of the present invention;

FIG. 2 is a perspective view of an automatic hanging clothes washing machine according to embodiment 1 of the present invention;

fig. 3 is a perspective view of an automatic hanging-type clothes washing machine according to embodiment 1 of the present invention;

fig. 4 is a schematic top view of a mobile showerhead structure according to embodiment 1 of the present invention;

fig. 5 is a schematic view of a structural angle of the first connecting pipe body and the second connecting pipe body according to embodiment 1 of the present invention;

fig. 6 is a schematic view of a structural angle of the first connecting pipe body and the second connecting pipe body according to embodiment 1 of the present invention;

fig. 7 is a schematic sectional view of a hinge joint of the first connecting pipe body and the second connecting pipe body in embodiment 1 of the present invention.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Example 1

Referring to fig. 1-3, fig. 1 is a perspective view of a structure angle of a hanging-type automatic clothes washing machine according to embodiment 1 of the present invention, fig. 2 is a perspective view of a structure angle of a hanging-type automatic clothes washing machine according to embodiment 1 of the present invention, and fig. 3 is a perspective view of a structure angle of a hanging-type automatic clothes washing machine according to embodiment 1 of the present invention. As shown in the drawings, embodiment 1 of the present invention provides a hanging type automatic clothes washing machine, which includes a machine body 10, a hot air system, a washing water system, a lifting nozzle assembly 20 and a control device;

the machine body 10 comprises a shell 11, an inner container 12 and a door body 13, wherein the inner container 12 is arranged in the shell 11; the inner container 12 and the shell 11 are both provided with placing openings, the door body 13 is hinged and fixed on the shell 11, and the movable cover is arranged at the placing openings;

the lifting spray head assembly 20 comprises a folding connecting pipe 21, a movable spray head 22 and a driving device 23; a through washing water passage (not shown) is formed inside the folding connection pipe 21, and the washing water passage is communicated with the washing water system; the folding connecting pipe 21 comprises a first end fixed on the top of the inner container 12 and a second end arranged in a hanging way, and the movable spray head 22 is fixed on the second end and communicated with the washing water channel; the driving device 23 is fixedly connected with the second end and is used for driving the movable spray head 22 to reciprocate along the height direction of the hanging type automatic clothes washing machine;

the control device is electrically connected to the hot air system, the washing water system and the driving device 23, and controls the on/off of the control device.

The embodiment 1 of the utility model provides a hanging type automatic clothes washing machine, it is through the setting of washing water system and the lift shower nozzle, the clothing that waits to wash hangs in the inner bag, through the lift shower nozzle with the high-pressure rivers injection that the washing water system produced to the clothing surface, reach the purpose of clean clothing, and avoided the clothing to contact with the structure of equipment, can effectively avoid secondary pollution, satisfy the demand that uses in public occasion; in addition, the lifting spray head assembly and the control device are arranged, the driving device is controlled to be opened or closed through program setting, and then the height of the movable spray head is adjusted, so that the specific part of the clothes can be intensively cleaned while the integral cleaning purpose of the clothes is realized, and the cleaning effect is effectively improved; simultaneously, the clothing is the nature state of hanging in washing drying process, has avoided utilizing among the prior art drum type washing machine and rotary drum type washing machine to wash when rotating, whipping the in-process because between clothing and the equipment structure and between clothing and the clothing physical contact that produces and then cause the problem of clothing damage, combines suspension type clothing washing drying machine washing and drying integral type sets up, directly utilizes hot air system to let in the hot-air after wasing and dries, realizes quick drying, and avoids the clothing to appear entangling the phenomenon, effectively avoids the clothing fold or warp, saves follow-up nursing operation, adapts to most people and washs the demand of drying fast to a small amount of clothing.

Specifically, the washing water system includes a water inlet pump 31, a first heating device 32, and a water inlet pipe 33; the intake pump 31 includes a pump outlet pipe 311; the first heating device 32 is used for heating the washing water introduced into the inner container 12, and washing the clothes by using high-temperature and high-pressure water flow to enhance the cleaning function of stains; the water inlet pipe 33 is in communication with the pump outlet pipe 311; the folding connection pipe 21 is communicated with the water inlet pipe 33.

The inner container 12 is provided with an air inlet and an air outlet (not shown); the hot air system comprises an air supply fan, an exhaust fan, an air inlet duct, an air exhaust duct and a second heating device (not shown), the air inlet duct is communicated with the air inlet, the air exhaust duct is communicated with the air outlet, and the air exhaust duct is communicated with the air outlet; the air supply fan is arranged in the air inlet duct, the air exhaust fan is arranged in the air exhaust duct, and the second heating device is used for heating air introduced into the inner container 12. Further preferably, the hot air system further comprises a smell removing agent box 41 and an ironing agent box 42, the smell removing agent box 41 is used for storing smell removing agents, the ironing agent box 42 is used for storing ironing agents, and both the smell removing agent box 41 and the ironing agent box 42 are communicated with the hot air system through pipelines, so that the smell removing agents and the ironing agents in the smell removing agent box 41 and the ironing agent box 42 can be introduced into the inner container along with hot air, and further clothes are nursed, peculiar smell is effectively removed, and nursing effect is improved

As an optional implementation manner, in the present embodiment, the washing water system further includes a detergent box 34, and the detergent box 34 is communicated with the water inlet pipe 33; the first heating device 32 is a boiler; the boiler comprises a boiler water outlet pipe 321, the detergent box 34 comprises a detergent outlet pipe 341, the water inlet pump 31 further comprises a pump inlet pipe 312, and the boiler water outlet pipe 321, the detergent outlet pipe 341 and the pump inlet pipe 312 are movably communicated through a two-position three-way valve 35. The detergent box 34 is used for storing detergent, the detergent can be extracted from the detergent box 34 during washing, and the detergent and washing water are mixed to form high-temperature and high-pressure liquid to impact clothes, so that the washing effect of dust, sweat and the like attached to the clothes is effectively improved.

Referring to fig. 4, fig. 4 is a schematic top view of a moving nozzle structure according to embodiment 1 of the present invention, and as shown in the figure, the moving nozzle 22 includes a nozzle holder and a plurality of nozzle bodies 221; the nozzle frame comprises a fixing part 222 and a plurality of extending parts 223; the fixing part 222 is fixedly connected with the folding connecting pipe 21 and the driving device 23; the number of the extending parts 223 is at least 2, and the extending parts 223 are uniformly arranged on one side of the fixing part 222 in a protruding manner along the length direction of the fixing part 222; the extension parts 223 are extended along the width direction of the fixing part 222, and the plurality of nozzle bodies 221 are communicated with the washing water channel and are uniformly arranged on the opposite side surfaces of two adjacent extension parts 223. During the use, the clothing that waits to wash hangs and is fixed in inner bag 12 top and lie in between two adjacent extension 223, and the shower nozzle body 211 of being convenient for washs its injection high pressure rivers from clothing both sides, effectively improves cleaning performance.

As an alternative embodiment, in this embodiment, the machine body 10 further includes a clothes hanger 14, and the clothes hanger 14 is hung and fixed on the top of the inner container 12 and used for hanging the clothes to be cleaned, so that the clothes can be cleaned in a natural and stretched state in the inner container 12, thereby improving the cleaning effect. The length extension direction of the clothes hanger 14 is the same as the extension direction of the extension portions 223, and the clothes hanger 14 is positioned between two adjacent extension portions 223 in the vertical projection plane. It is further preferable that the number of the extending portions 223 is at least 3, the number of the hangers 14 is at least 2, in the embodiment, the number of the extending portions 223 is 4, and the number of the hangers 14 is 3, in other embodiments, the number of the hangers 14 may be more according to design or practical use requirements, without limiting to this example, and a plurality of the hangers 14 are uniformly arranged in sequence along the length direction of the fixing portion 222, and each hanger 14 is located between two adjacent extending portions 223 in the vertical projection plane. The extension 223 and the hanger 14 are disposed so that the nozzle body 221 can be located at both sides of each laundry to be cleaned when the lift nozzle assembly 20 reciprocates, and the high-temperature washing water can wash each laundry from both sides of the laundry, thereby effectively ensuring the cleaning effect.

As an optional implementation manner, in this embodiment, the nozzle holder has a hollow structure, the nozzle body 221 is a through hole formed through the side wall of the extension portion 223, and the high-temperature washing water can be sprayed from the through hole to the surface of the clothes to be cleaned by using the pressure of the water pump, so that an additional structure is not required, the structure is simpler, and the later maintenance is facilitated.

Specifically, as an alternative embodiment, in the present embodiment, the driving device 23 includes a motor 231, a pulley 232, and a traction rope 233; the output shaft of the motor 231 is fixedly connected with the pulley 232 and drives the pulley 232 to rotate; one end of the pulling rope 233 is fixedly connected with the pulley 232 and movably wound around the pulley 232 along the circumferential direction, and the other end is fixedly connected with the movable nozzle 22. In other embodiments, the driving device 23 may have other structures as long as the driving moving nozzle 22 can reciprocate in the height direction of the automatic washing machine for hanging clothes, and the structure is not limited to this example.

As an optional implementation manner, in the present embodiment, the foldable connecting tube 21 includes a plurality of connecting tube bodies, and the connecting tube bodies are hollow structures; the connecting pipe bodies are movably hinged end to end and are sequentially communicated with each other, and a multiple Z-shaped structure is formed, as shown in figure 2.

Specifically, please refer to fig. 5-6, fig. 5 is a schematic view of the first connecting pipe body and the second connecting pipe body structure angle in embodiment 1, fig. 6 is a schematic view of the first connecting pipe body and the second connecting pipe body structure angle in embodiment 1 of the present invention, as shown in the figure, the folding connecting pipe 21 includes a plurality of first connecting pipe bodies 211, a plurality of second connecting pipe bodies 212 and a plurality of fixing screws 213, the first connecting pipe bodies 211 and the second connecting pipe bodies 212 are both hollow structures, further, the first connecting pipe bodies 211 and the second connecting pipe bodies 212 are stainless steel or high temperature resistant polymer, and the cross section thereof is circular or rectangular.

Referring to fig. 7, fig. 7 is a schematic cross-sectional view of a movable hinge joint of the first connecting pipe body and the second connecting pipe body according to embodiment 1 of the present invention, as shown in the figure, a side wall of an end portion of the first connecting pipe body 211 is provided with a first circular through hole 214 and a second circular through hole 215 which are opposite to each other, and an inner diameter of the first circular through hole 214 is larger than an inner diameter of the second circular through hole 215; the first connecting pipe body 211 further comprises a first connecting part 216, and the first connecting part 216 is convexly arranged on the outer side of the side wall of the first connecting pipe body 211 and is arranged around the first circular through hole 214;

a third circular through hole 217 is formed through the side wall of the end of the second connecting pipe body 212, and the inner diameter of the third circular through hole 217 is not smaller than the outer diameter of the first connecting part 216; the second connecting pipe body 212 further comprises a second connecting portion 218, wherein the second connecting portion 218 is convexly arranged on the inner side of the side wall of the second connecting pipe body 212, penetrates through the third circular through hole 217 and extends to the outside of the second connecting pipe body 212; the end surface of the second connecting part 218 is provided with a screw hole 219 matched with the fixing screw 213, and the outer diameter of the second connecting part 218 is smaller than the inner diameter of the first circular through hole 214 and larger than the inner diameter of the second circular through hole 215;

the first connecting portion 216 movably penetrates the third circular through hole 217, the second connecting portion 218 movably penetrates the first circular through hole 214 and abuts against the inner side of the sidewall of the first connecting pipe body 211, and the fixing screw 213 sequentially penetrates the second circular through hole 215 and the screw hole 219. In the above description, the movable penetration of the first connection portion 216 is defined as: the first connecting portion 216 is movable in the third circular through hole 217 in its circumferential direction, but its movement in the axial direction is restricted.

The arrangement is simple, the folded structure occupies small space, and the capacity of the inner container 12 is not influenced when the first connecting pipe body and the second connecting pipe body are movably hinged. In addition, it should be noted that the folding connection pipe 21 defined by the above structure is one implementation manner of the folding connection pipe 21 of the embodiment of the present invention, and in other implementation manners, the folding connection pipe 21 may also be a high temperature resistant rubber part with flexibility, which may be linear and foldable by using its own flexibility, or may be designed to be spiral and foldable by using its own elasticity, which is not listed in the description of the embodiment.

Further preferably, the foldable connecting tube 21 further includes a plurality of connecting sealing rings 210 disposed between the first connecting portion 216 and the third circular through hole 217. The arrangement of the connection sealing ring 210 can well seal the movable hinged parts of the first connection pipe body 211 and the second connection pipe body 212, and the washing water is prevented from leaking from the gap between the first connection pipe body 211 and the second connection pipe body 212 to influence normal use.

The embodiment 1 of the utility model provides an automatic hanging clothes cleaning machine, it is through the setting of clothes hanger, washing water system and the lift shower nozzle, the clothing that waits to wash hangs in clothes hanger and unsettled places in the inner bag, through the lift shower nozzle with the high temperature high pressure rivers injection that washing water system produced to the clothing surface, reach the purpose of clean clothing, and avoided the clothing and the contact of the structure of equipment, can effectively avoid secondary pollution, satisfy the demand that uses in public occasion; in addition, the arrangement of the lifting spray head assembly and the control device is combined with the limitation of the lifting spray head assembly and further limits the structure of the folding connecting pipe, the opening or closing of the driving device is controlled through program setting, and then the height of the movable spray head is adjusted, so that the specific part of the clothes can be intensively cleaned while the integral cleaning purpose of the clothes is realized, the cleaning effect is effectively improved by further combining the arrangement of the detergent box, the structure of the device is simple, and the later maintenance is simple; simultaneously, the clothing is the nature state of hanging in washing drying process, has avoided utilizing among the prior art drum type washing machine and rotary drum type washing machine to wash when rotating, whipping the in-process because between clothing and the equipment structure and between clothing and the clothing physical contact that produces and then cause the problem of clothing damage, combines suspension type clothing washing drying machine washing and drying integral type sets up, directly utilizes hot air system to let in the hot-air after wasing and dries, realizes quick drying, and avoids the clothing to appear entangling the phenomenon, effectively avoids the clothing fold or warp, saves follow-up nursing operation, adapts to most people and washs the demand of drying fast to a small amount of clothing.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The utility model provides a hanging clothing self-cleaning machine which characterized in that: comprises a machine body, a hot air system, a washing water system, a lifting spray head and a control device;

the lifting spray head assembly comprises a folding connecting pipe, a movable spray head and a driving device; a through washing water channel is formed inside the folding connecting pipe, and the washing water channel is communicated with the washing water system; the folding connecting pipe comprises a first end fixed at the top of the inner container and a second end arranged in a hanging way, and the movable spray head is fixed at the second end and communicated with the washing water channel; the driving device is fixedly connected with the second end and is used for driving the movable spray head to reciprocate along the height direction of the hanging type automatic clothes washing machine;

2. A hanging clothes automatic cleaning machine according to claim 1, wherein: the movable spray head comprises a spray head frame and a plurality of spray head bodies; the spray head frame comprises a fixing part and a plurality of extension parts; the fixing part is fixedly connected with the folding connecting pipe and the driving device; the number of the extension parts is at least 2, the extension parts are uniformly arranged on one side of the fixing part in a protruding manner along the length direction of the fixing part, and the extension parts are arranged in an extending manner along the width direction of the fixing part; the plurality of spray head bodies are communicated with the washing water channel and are uniformly arranged on the opposite side surfaces of the two adjacent extending parts.

3. A hanging clothes automatic cleaning machine according to claim 2, wherein: the machine body further comprises a clothes hanger which is fixedly hung on the top of the inner container; the length extension direction of the clothes rack is the same as the extension direction of the extension parts, and the clothes rack is located between two adjacent extension parts in the vertical projection plane.

4. A hanging clothes automatic cleaning machine according to claim 2, wherein: the spray head frame is of a hollow structure, and the spray head body is a through hole formed by penetrating the extending part.

5. A hanging clothes automatic cleaning machine according to claim 1, wherein: the folding connecting pipe comprises a plurality of connecting pipe bodies, and the connecting pipe bodies are of hollow structures; and the connecting pipe bodies are movably hinged end to end and sequentially communicated, and form a multiple Z-shaped structure.

6. An automatic hanging clothes washing machine as defined in claim 5, wherein: the folding connecting pipe comprises a plurality of first connecting pipe bodies, a plurality of second connecting pipe bodies and a plurality of fixing screws, and the first connecting pipe bodies and the second connecting pipe bodies are both of hollow structures;

a first circular through hole and a second circular through hole which are opposite to each other are formed in the side wall of the end part of the first connecting pipe in a penetrating mode, and the inner diameter of the first circular through hole is larger than that of the second circular through hole; the first connecting pipe body further comprises a first connecting part, and the first connecting part is convexly arranged on the outer side of the side wall of the first connecting pipe body and surrounds the first circular through hole;

a third circular through hole is formed in the side wall of the end part of the second connecting pipe in a penetrating mode, and the inner diameter of the third circular through hole is not smaller than the outer diameter of the first connecting part; the second connecting pipe also comprises a second connecting part, and the second connecting part is convexly arranged on the inner side of the side wall of the second connecting pipe body, penetrates through the third circular through hole and extends out of the second connecting pipe; the end face of the second connecting part is provided with a screw hole matched with the fixing screw, and the outer diameter of the second connecting part is smaller than the inner diameter of the first circular through hole and larger than the inner diameter of the second circular through hole;

the first connecting portion is movably arranged in the third circular through hole in a penetrating mode, the second connecting portion is movably arranged in the first circular through hole in a penetrating mode and abutted against the inner side of the side wall of the first connecting pipe, and the fixing screws sequentially penetrate through the second circular through hole and the screw holes.

7. An automatic hanging clothes washing machine as defined in claim 6, further comprising: the folding connecting pipe further comprises a plurality of connecting sealing rings, and the connecting sealing rings are arranged between the first connecting portion and the third circular through hole.

8. A hanging clothes automatic cleaning machine according to claim 1, wherein: the washing water system comprises a water inlet pump, a first heating device and a water inlet pipeline; the water inlet pump comprises a pump outlet pipe; the first heating device is used for heating the washing water introduced into the inner container; the water inlet pipeline is communicated with the pump outlet pipe; the folding connecting pipe is communicated with the water inlet pipeline.

9. A hanging clothes automatic cleaning machine according to claim 8, wherein: the washing water system also comprises a detergent box, and the detergent box is communicated with the water inlet pipeline; the first heating device is a boiler; the boiler includes the boiler outlet pipe, the detergent box includes the detergent outlet pipe, the intake pump still includes the pump import pipe, the boiler outlet pipe the detergent outlet pipe and the pump import pipe communicates through two three-way valve activities.

10. A hanging clothes automatic cleaning machine according to claim 1, wherein: the inner container is provided with an air inlet and an air outlet; the hot air system comprises an air supply fan, an exhaust fan, an air inlet duct, an air exhaust duct and a second heating device, the air inlet duct is communicated with the air inlet, and the air exhaust duct is communicated with the air outlet; the air supply fan is arranged in the air inlet duct, the air exhaust fan is arranged in the air exhaust duct, and the second heating device is used for heating air introduced into the inner container.