CN218059616U - Heat pump type auxiliary drying structure of clothes treatment equipment and clothes treatment equipment - Google Patents

Abstract

The utility model provides a heat pump-type clothing treatment facility auxiliary drying structure and clothing treatment facility, auxiliary drying structure sets up on the stoving wind channel, and the stoving wind channel includes wind channel upper cover and wind channel lower cover, is provided with the fan in the one end in stoving wind channel, is provided with the exhaust passage at the stoving wind channel other end, and auxiliary drying structure includes auxiliary heating device, and auxiliary heating device sets up between fan and exhaust passage, and auxiliary heating device includes heater and high temperature resistant sheath, and high temperature resistant sheath cover is established on the heater surface. The utility model discloses a set up auxiliary heating device on the wind channel of drying to surface at auxiliary heating device sets up high temperature resistant sheath, reduces the hot-blast temperature that gets into the cylinder inside on the one hand, and on the other hand makes the wind channel of drying can adopt non-metallic material to prepare, reduces its heat conductivility, and the part in the protection wind channel outside of drying can avoid the removal of auxiliary heating device in the wind channel of drying through the restriction of spacing muscle.

Description

Heat pump type auxiliary drying structure of clothes treatment equipment and clothes treatment equipment

Technical Field

The utility model relates to a clothing treatment facility technical field particularly, relates to a supplementary stoving structure of heat pump formula clothing treatment facility and clothing treatment facility.

Background

The heat pump drying system is a common drying structure on the clothes processing equipment, changes the pressure of a refrigerant in a piping of the heat pump system from liquid to gas, absorbs and releases heat energy along with the change of form and pressure, and then carries the heat energy to a condenser by utilizing an evaporator, thereby realizing the drying of clothes.

However, the drying structure has the disadvantages of slow heating temperature rise, low temperature and the like in the actual use process, and cannot meet the requirement of a user on quick drying of clothes.

Chinese patent CN201510564024.4 discloses a clothes dryer and a control method, wherein the clothes dryer comprises a circulation air path formed by an outer cylinder and a drying air path, and a heat pump system; an evaporator and a condenser of the heat pump system are arranged in the drying air duct, and are used for respectively condensing and heating circulating air flow flowing through; an air inlet door and an air outlet door which can be controlled to open and close are arranged on the circulating air path to be controllably communicated or disconnected with the outside, and an auxiliary heating wire for carrying out auxiliary heating on flowing gas is arranged in the drying air channel and is arranged at the downstream of the condenser. This patent can carry out the auxiliary heating to the air through the setting of auxiliary heating wire, rapid heating up when realizing drying, however, the temperature of auxiliary heating wire is not easily controlled, leads to the high temperature easily to damage the clothing, and the wind channel also need adopt metal preparation, leads to product cost to rise on the one hand, on the other hand, because the heat conductivity of metal is better, conduct to the clothing treatment facility inside through stoving wind channel shell easily, cause adverse effect to its inside other parts.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem be, among the prior art, the temperature of auxiliary heating wire is wayward, leads to the high temperature to damage the clothing easily, and the wind channel also needs to adopt metal preparation, leads to product cost to rise on the one hand, and on the other hand because the heat conductivity of metal is better, conducts to clothing treatment facility inside through stoving wind channel shell easily, causes unfavorable influence to its inside other parts.

The utility model discloses a heat pump-type clothing treatment facility auxiliary drying structure, auxiliary drying structure sets up on the stoving wind channel, the stoving wind channel includes wind channel upper cover and wind channel lower cover the one end in stoving wind channel is provided with the fan the stoving wind channel other end is provided with the air flue, auxiliary drying structure includes auxiliary heating device, auxiliary heating device sets up between fan and air flue, auxiliary heating device includes heater and high temperature resistant sheath, high temperature resistant sheath cover is established on the heater surface.

The auxiliary heating device can rapidly improve the temperature in the drying air channel so as to achieve the purpose of rapidly drying clothes, the high-temperature-resistant sheath can prevent the clothes from being damaged due to overhigh temperature, related components on the outer side of the drying air channel can be effectively protected, damage caused by heat transfer of the air channel upper cover and/or the air channel lower cover is avoided, high-temperature-resistant plastics can be used for replacing metal to manufacture the air channel upper cover and the air channel lower cover, the weight of the device is reduced, the heat conduction performance of the air channel upper cover and the air channel lower cover is reduced, the related components on the outer side of the drying air channel are further protected, and the use safety of the clothes processing device is improved.

Furthermore, a limiting structure is arranged on the inner wall of the drying air duct, and the auxiliary heating device is fixedly arranged in the drying air duct through the limiting structure.

The limiting structure is arranged to prevent the auxiliary heating device from moving in the drying air channel, so that the auxiliary heating effect is guaranteed.

Furthermore, limit structure includes spacing muscle down, last spacing muscle and spacing groove, spacing muscle setting is covered under the wind channel down, it is in to go up spacing muscle setting on the wind channel upper cover, the spacing groove sets up on wind channel upper cover and/or the wind channel lower cover.

The two ends of the upper limiting rib and the lower limiting rib are high, the middle of the upper limiting rib and the lower limiting rib is low, so that the auxiliary heating device is limited at the middle low position, and the displacement of the auxiliary heating device when air flow blows is avoided.

Furthermore, the auxiliary drying structure further comprises a temperature controller, wherein the temperature controller is arranged on the outer wall of the drying air duct, and the temperature controller is arranged at the downstream of the auxiliary heating device.

The temperature controller can effectively control the temperature of the airflow after passing through the auxiliary heating device, thereby avoiding damage to clothes due to overhigh temperature and ensuring the use safety of the clothes treatment equipment.

Furthermore, the air duct upper cover and/or the air duct lower cover are/is provided with a threading hole, and a wire connecting the auxiliary heating device and the temperature controller penetrates out of the threading hole.

The threading hole is used for electrically connecting the auxiliary heating device and the temperature controller, so that the temperature control of the heater is facilitated, and the damage caused by overhigh temperature is avoided.

Further, the heater is a heating wire heater or a PTC heater.

The PTC heater and the heating wire have the characteristics of high heating speed and uniform heating, can quickly reach the target temperature, and can safely and quickly realize the quick drying function of the clothes treatment equipment by matching with the high-temperature-resistant sheath.

Furthermore, the high temperature resistant sheath is made of high temperature resistant silica gel.

The high-temperature-resistant jacket prepared from the high-temperature-resistant silica gel can separate the heater from the air flow to be heated, so that the phenomenon that the air flow is directly heated by the heater to cause the temperature to be too high and damage clothes is avoided, the heater can also be separated from the air duct upper cover and the air duct lower cover, and the phenomenon that the air duct upper cover and the air duct lower cover have too high temperatures and influence other parts on the outer side of the heater is avoided.

Furthermore, the air duct upper cover and the air duct lower cover are made of high-temperature-resistant plastics.

The drying air duct is changed into a plastic material, so that the weight of equipment can be reduced, the cost is reduced, the heat conductivity coefficient of plastic is far lower than that of metal, and the temperature around the outer side of the plastic is greatly reduced, so that the components around the drying air duct are in a good working environment, and the service life of the components is prolonged.

The utility model also discloses a clothing treatment facility, include as above the supplementary stoving structure of heat pump-type clothing treatment facility.

Compared with the prior art, the clothes treatment equipment has the same advantages as the auxiliary drying structure of the heat pump type clothes treatment equipment, and the detailed description is omitted.

Furthermore, the clothes treatment equipment comprises more than two rotary drums, more than two air outlet channels are arranged in the drying air channel and are connected with the rotary drums in a one-to-one correspondence manner, and an air channel switching device is arranged in the drying air channel and is arranged at the downstream of the auxiliary heating device and used for conveying hot air into one or more than two rotary drums.

In the setting, adopt a stoving wind channel can provide the stoving for the more than two cylinders and use the air current, and a stoving wind channel corresponds one set of heat pump system, and the equal more than two cylinders of adopting one set of heat pump system to supply are dried, have reduced the weight of clothing processing apparatus on the one hand and have reduced the cost of product simultaneously, and on the other hand helps clothing processing apparatus's miniaturized design.

Compared with the prior art, supplementary stoving structure of heat pump-type clothing treatment facility and clothing treatment facility have following advantage:

the utility model discloses a set up auxiliary heating device on the wind channel of drying to surface at auxiliary heating device sets up high temperature resistant sheath, reduce the hot-blast temperature that gets into the cylinder inside on the one hand, on the other hand makes the wind channel of drying can adopt non-metallic material to prepare, reduce its heat conductivility, thereby protect the inside device of clothing treatment facility, in addition, through the setting of temperature controller, can the heating temperature of accurate control auxiliary heating device, through the restriction of spacing muscle, can avoid the removal of auxiliary heating device in the wind channel of drying. The utility model discloses simple structure, it is simple convenient to assemble, has improved the drying efficiency of clothing treatment facility and the safety in utilization of its inside device.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a drying air duct according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the portion B in FIG. 1;

fig. 3 is a top view of the drying duct according to the embodiment of the present invention;

FIG. 4 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is an enlarged partial view of the area D in FIG. 4;

fig. 6 is a schematic view illustrating a flow direction of air in the drying duct according to an embodiment of the present invention;

fig. 7 is a top view of a lower cover of an air duct according to an embodiment of the present invention;

FIG. 8 is an enlarged partial view of the area E in FIG. 7;

fig. 9 is a top view of the lower cover of the air duct provided with the auxiliary heating device according to the embodiment of the present invention;

FIG. 10 is a cross-sectional view taken at F-F of FIG. 9;

fig. 11 is a schematic structural view of an auxiliary heating device according to an embodiment of the present invention;

fig. 12 is a further top view of the drying duct according to the embodiment of the present invention;

FIG. 13 is a cross-sectional view taken at the location G-G in FIG. 12 and showing therein the flap arrangement in three positions a, b and c;

fig. 14 is a schematic structural diagram of an air duct switching device according to an embodiment of the present invention.

Description of the reference numerals:

1. a fan; 2. a volute; 3. an air duct upper cover; 4. an air duct lower cover; 5. a first air outlet channel; 6. threading holes; 7. a temperature controller; 8. a limiting structure; 81. a lower limiting rib; 82. an upper limit rib; 83. a limiting groove; 9. an auxiliary heating device; 91. a heater; 92. a high temperature resistant sheath; 10. an air duct switching device; 101. a commutation drive; 102. a drive shaft; 103. a catch cam; 11. a flap device; 111. an air duct adjusting baffle; 112. a rotating shaft; 12. and a second air outlet channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting of the invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The following describes a heat pump type clothes treatment device auxiliary drying structure and a clothes treatment device according to an embodiment of the present invention with reference to the accompanying drawings.

Example 1

The embodiment provides a heat pump type clothes treatment equipment auxiliary drying structure, and is arranged in a drying air channel, as shown in fig. 1-14, the drying air channel comprises an air channel upper cover 3 and an air channel lower cover 4, the air channel upper cover 3 and the air channel lower cover 4 are made of high temperature resistant materials, and specific high temperature resistant materials can be selected by the set temperature of an auxiliary heating device 9, one end of the drying air channel is connected with a volute 2, a fan 1 is arranged in the volute 2, an air outlet channel is arranged at the other end of the drying air channel, the fan 1 sucks air after being started, and the air is sent into the air outlet channel through the drying air channel to flow out, wherein one flow mode is shown by an arrow in fig. 6. In this embodiment, the auxiliary drying structure includes auxiliary heating device 9, auxiliary heating device 9 sets up between fan 1 and exhaust passage, auxiliary heating device 9 includes heater 91 and high temperature resistant sheath 92, high temperature resistant sheath 92 cover is established on the heater 91 surface. In the prior art, only the heater 91 is usually arranged, because the heater 91 is heated quickly, the temperature of the outlet air is usually not easy to control, and the clothes are easy to damage, in addition, the heater 91 is heated quickly and has high temperature, so that the air duct upper cover 3 and the air duct lower cover 4 need to be made of high-temperature-resistant materials, in order to ensure the service life of the air duct upper cover 3 and the air duct lower cover 4, the air duct upper cover 3 and the air duct lower cover 4 are usually made of metal, on one hand, the cost is high, the machine body is heavy, on the other hand, the heat conductivity of the metal is good, and the damage to other components in the machine body of the clothes processing equipment is easy to cause, the arrangement of the high-temperature-resistant sheath 92 isolates the heater 91 from flowing air, the air duct upper cover 3 and the air duct lower cover 4, on the other hand, the working temperature of the air duct upper cover 3 and the air duct lower cover 4 can be reduced, so that the air duct upper cover 3 and the air duct lower cover 4 are made of common high-temperature-resistant and heat-insulating materials (such as plastics) so that the weight of the machine body is reduced, and the temperature of the shells of the air duct upper cover 3 and the air duct lower cover 4 is prevented from being damaged by other components in the clothes processing equipment; on the other hand, the temperature of the air in the drying air duct is controlled, and damage to clothes caused by overhigh temperature is avoided. In this embodiment, the auxiliary heating device 9 is configured to rapidly increase the temperature in the drying air duct to achieve the purpose of rapidly drying the clothes, the high temperature resistant sheath 92 is configured to prevent the clothes from being damaged due to an excessive temperature, and on the other hand, to effectively protect the relevant components outside the drying air duct, so as to prevent the damage due to the heat transfer of the air duct upper cover 3 and/or the air duct lower cover 4, and the air duct upper cover 3 and the air duct lower cover 4 can also be made of high temperature resistant plastic instead of metal, so that the weight of the device is reduced, the heat conductivity of the air duct upper cover 3 and the air duct lower cover 4 is reduced, the relevant components outside the drying air duct are further protected, and the safety of the clothes processing device is improved.

As a partial optional embodiment, a limiting structure 8 is arranged on an inner wall of the drying air duct, and the auxiliary heating device 9 is fixedly arranged in the drying air duct through the limiting structure 8. The arrangement of the limiting structure 8 can avoid the movement of the auxiliary heating device 9 in the drying air duct, thereby ensuring the auxiliary heating effect.

In one embodiment, the limiting structure 8 includes a lower limiting rib 81, an upper limiting rib 82 and a limiting groove 83, the lower limiting rib 81 is disposed on the air duct lower cover 4, the upper limiting rib 82 is disposed on the air duct upper cover 3, and the limiting groove 83 is disposed on the air duct upper cover 3 and/or the air duct lower cover 4. Optionally, the upper limiting rib 82 and the lower limiting rib 81 are correspondingly arranged, and the upper limiting rib 82, the lower limiting rib 81 and the limiting groove 83 are matched with the high-temperature-resistant sheath 92 for limiting, so that the fixing effect of the auxiliary heating device 9 is ensured. As shown in fig. 5, the upper limiting rib 82 is disposed on the upper inner wall of the air duct upper cover 3, the lower limiting rib 81 is disposed on the lower inner wall of the air duct lower cover 4, the limiting groove 83 is at least partially disposed on the side wall of the air duct upper cover 3 and/or the air duct lower cover 4, and the upper limiting rib 82 and the lower limiting rib 81 have high ends and low ends, so as to limit the auxiliary heating device 9 at a low position in the middle and prevent the auxiliary heating device from being displaced when the air flow blows through the auxiliary heating device.

Optionally, the auxiliary drying structure further includes a temperature controller 7, the temperature controller 7 is disposed on an outer wall of the drying air duct, and the temperature controller 7 is disposed at a downstream of the auxiliary heating device 9. The temperature controllers 7 are electrically connected with the auxiliary heating device 9, the temperature controllers 7 are used for detecting the temperature of the airflow after passing through the auxiliary heating device 9, so as to control the starting or stopping of the auxiliary heating device 9, in some alternative embodiments, there are more than two temperature controllers 7, at least one temperature controller 7 is used for automatically controlling the starting or stopping of the auxiliary heating device 9, and at least another temperature controller 7 is connected with a manual switch and is used for automatically controlling the manual closing of the auxiliary heating device 9 when the auxiliary heating device 9 fails. The temperature controller 7 can effectively control the temperature of the airflow after passing through the auxiliary heating device 9, thereby avoiding damage to clothes due to overhigh temperature and ensuring the use safety of the clothes treatment equipment. The manner in which the thermostat 7 automatically controls the auxiliary heating device 9 to start or stop belongs to the prior art, and is not limited and described herein. The downstream refers to a downstream where gas in the drying air flows, and further, the temperature controller 7 is disposed between the auxiliary heating device 9 and the air outlet duct.

In some alternative embodiments, the heater 91 is a heating wire heater or a PTC heater. The PTC heater and the heating wire have the characteristics of high heating speed and uniform heating, can quickly reach the target temperature, and can safely and quickly realize the quick drying function of the clothes treatment equipment by matching with the high-temperature-resistant sheath 92.

As the embodiment of the utility model, be provided with through wires hole 6 on wind channel upper cover 3 and/or the wind channel lower cover 4, connect the wire of auxiliary heating device 9 and temperature controller 7 is followed wear out in the through wires hole 6. The threading hole 6 is used for electrically connecting the auxiliary heating device 9 and the temperature controller 7, thereby being beneficial to controlling the temperature of the heater 91 and avoiding damage caused by overhigh temperature.

In some alternative embodiments, the high temperature resistant sheath 92 is made of high temperature resistant silica gel. The high-temperature-resistant silica gel can work normally in an environment of 200-300 ℃, and the drying temperature of the clothes treatment equipment is generally 50-70 ℃, so that the high-temperature-resistant jacket 92 prepared by adopting the high-temperature-resistant silica gel can separate the heater 91 from the air flow to be heated, the phenomenon that the heater 91 directly heats the air flow to cause overhigh temperature and damage the clothes is avoided, the heater 91 can be separated from the air duct upper cover 3 and the air duct lower cover 4, and the phenomenon that the air duct upper cover 3 and the air duct lower cover 4 have overhigh temperature and influence other parts on the outer side of the air duct upper cover 3 and the air duct lower cover 4 is avoided. Optionally, the high-temperature-resistant silica gel with high temperature resistance of over 160 ℃ in the prior art can meet the use requirement.

As some optional embodiments, the material of the air duct upper cover 3 and the air duct lower cover 4 is high temperature resistant plastic. In the prior art, the air duct upper cover 3 and the air duct lower cover 4 are usually made of metal materials, and there is no other barrier between the heater 91 and the air duct upper cover 3 and the air duct lower cover 4, because the heat conductivity coefficient of the metal materials is very large, the temperature of the peripheral area outside the air duct upper cover 3 and the air duct lower cover 4 is very high, and the components therein are easily damaged. The specific material of the high temperature resistant plastic can be selected from the existing high temperature resistant plastics according to the high temperature resistant requirement, and is not limited and described herein.

Example 2

The present embodiment discloses a laundry treating apparatus including the heat pump laundry treating apparatus auxiliary drying structure as described in embodiment 1.

The laundry processing apparatus and the heat pump type laundry processing apparatus auxiliary drying structure described in embodiment 1 have the same advantages as the prior art, and are not described herein again. The laundry treating apparatus includes, but is not limited to, a dryer and a washing and drying all-in-one machine.

In addition, in the prior art, along with the improvement of living standard, the hygiene consciousness in the aspect of washing is stronger and the consciousness in the aspect of environmental protection and saving is higher, and in the aspect of daily washing of household clothes, more and more people wash or dry the clothes according to different clothes types. Under this condition, many cylinders have been appeared and have been washed and dried all-in-one or many cylinders drying-machine to a equipment separately washes the clothing of difference, and dry respectively, under this condition, set up a stoving wind channel to each cylinder and occupy a large amount of spaces on the one hand, be unfavorable for the miniaturization of product, on the other hand stoving wind channel needs to be equipped with corresponding heat pump system, will lead to the rising by a wide margin of cost.

As one optional embodiment, the laundry processing apparatus includes more than two drums, more than two air outlets are arranged in the drying air duct, the more than two air outlets are connected with the drums in a one-to-one correspondence manner, an air duct switching device 10 is arranged in the drying air duct, and the air duct switching device 10 is arranged downstream of the auxiliary heating device 9 and is used for conveying hot air into one or more than two drums. In the setting, adopt a stoving wind channel can provide the stoving for the more than two cylinders and use the air current, and a stoving wind channel corresponds one set of heat pump system, and the equal more than two cylinders of adopting one set of heat pump system to supply are dried, have reduced the weight of clothing processing apparatus on the one hand and have reduced the cost of product simultaneously, and on the other hand helps clothing processing apparatus's miniaturized design.

In one embodiment, the clothes treatment apparatus includes two rollers, the drying air duct includes a first air outlet duct 5 and a second air outlet duct 12, which are respectively and correspondingly connected to the first roller and the second roller (not shown), the air duct switching device 10 includes a reversing driving device 101 and a blocking piece device 11, a first end of the blocking piece device 11 is rotatably installed in the drying air duct, an output shaft of the reversing driving device 101 is connected to a transmission shaft 102, a blocking piece cam 103 is installed on the transmission shaft 102, the blocking piece cam 103 is disposed at a second end of the blocking piece device 11, and the blocking piece cam 103 abuts against the blocking piece device 11, the reversing driving device 101 drives the transmission shaft 102 to drive the blocking piece cam 103 to rotate, so as to drive the blocking piece device 11 to switch between a first position a, a second position b, and a third position c in the drying air duct, so that the drying air duct can be selectively communicated with the first air outlet duct 5 and/or the second air outlet duct 12. In the setting, through the setting of wind channel auto-change over device 10, carry stoving gas through a set of firing equipment to in one or two cylinders, saved a set of heating device, reduced product weight, saved product cost, also be favorable to the miniaturized design of product. In some alternative embodiments, the commutation drive 101 is a commutation motor.

Optionally, the baffle device 11 includes an air duct adjusting baffle 111 and a rotating shaft 112, the rotating shaft 112 is installed in the drying air duct, and the air duct adjusting baffle 111 is installed on the rotating shaft 112. The contact surfaces of the air duct adjusting baffle 111 and the baffle cam 103 are arranged in an arc shape, and in the rotation process of the baffle cam 103, the air duct adjusting baffle 111 and the baffle cam are pushed to change positions along with the arc change of the contact surfaces, so that the air duct is switched. The structure is simple, the operation is easy, and the air flow can be easily switched between the first air outlet channel 5 and/or the second air outlet channel 12.

It should be noted that all terms used in the present invention for directional and positional indication, such as: "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "lower", "tail end", "head end", "center", etc. are only used to explain the relative positional relationship, connection conditions, etc. between the parts in a certain specific state, and only for the convenience of description the present invention, rather than requiring that the present invention must be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation of the present invention. Furthermore, the descriptions in the present application related to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of technical features indicated are implicitly being indicated. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B", including either A or B or both A and B.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims (10)

1. The utility model provides a heat pump type clothing treatment facility auxiliary drying structure, a serial communication port, auxiliary drying structure sets up on the stoving wind channel, the stoving wind channel includes wind channel upper cover (3) and wind channel lower cover (4) the one end in stoving wind channel is provided with fan (1) the stoving wind channel other end is provided with the exhaust passage, auxiliary drying structure includes auxiliary heating device (9), auxiliary heating device (9) set up between fan (1) and exhaust passage, auxiliary heating device (9) include heater (91) and high temperature resistant sheath (92), high temperature resistant sheath (92) cover is established on heater (91) surface.

2. Heat pump laundry treatment apparatus auxiliary drying structure according to claim 1, characterized in that a limiting structure (8) is provided on an inner wall of the drying air duct, and the auxiliary heating device (9) is fixedly arranged in the drying air duct by means of the limiting structure (8).

3. A heat pump type laundry treatment apparatus auxiliary drying structure according to claim 2, characterized in that the limiting structure (8) comprises a lower limiting rib (81), an upper limiting rib (82) and a limiting groove (83), the lower limiting rib (81) is disposed on the air duct lower cover (4), the upper limiting rib (82) is disposed on the air duct upper cover (3), and the limiting groove (83) is disposed on the air duct upper cover (3) and/or the air duct lower cover (4).

4. A heat pump laundry treatment apparatus auxiliary drying structure according to claim 1, characterized in that said auxiliary drying structure further comprises a thermostat (7), said thermostat (7) being arranged on an outer wall of said drying air duct, and said thermostat (7) being arranged downstream of said auxiliary heating device (9).

5. A heat pump type clothes treatment apparatus auxiliary drying structure according to claim 4, wherein a threading hole (6) is provided on the air duct upper cover (3) and/or the air duct lower cover (4), and a wire connecting the auxiliary heating device (9) and the temperature controller (7) is passed through the threading hole (6).

6. Heat pump laundry treatment apparatus auxiliary drying arrangement according to claim 1, characterized in that said heater (91) is a heating wire heater or a PTC heater.

7. A heat pump laundry processing apparatus auxiliary drying structure according to claim 1, wherein the high temperature resistant sheath (92) is made of high temperature resistant silicone.

8. A heat pump type clothes treatment apparatus auxiliary drying structure according to claim 1, wherein the duct upper cover (3) and the duct lower cover (4) are made of high temperature resistant plastic.

9. A laundry treatment apparatus, comprising a heat pump laundry treatment apparatus auxiliary drying structure according to any of claims 1-8.

10. The laundry treatment apparatus according to claim 9, characterized in that the laundry treatment apparatus comprises more than two drums, more than two air outlets are provided in the drying air duct, the more than two air outlets are connected with the drums in a one-to-one correspondence, an air duct switching device (10) is provided in the drying air duct, and the air duct switching device (10) is provided downstream of the auxiliary heating device (9) for delivering hot air into one or more than two drums.

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