Dryer

Abstract

Provided is a dryer in the technical field of laundry treatment apparatuses. The dryer comprises: a drum module (2); a drying air duct; a first filter and a second filter, which are mounted inside the drying air duct, the first filter being located downstream of the second filter; and a third filter (46), which is mounted at an air inlet end of the drying air duct or inside an air outlet of the drum module, wherein the third filter can block most of lint, and only a small portion of lint can enter the drying air duct. The third filter has the lowest mesh count, which helps to reduce the impact on airflow; the first filter located farthest downstream has the highest mesh count, most of lint entering the drying air duct are intercepted by the second filter, and even if a small portion of lint pass through the second filter, the lint can be intercepted by the first filter with higher filtering accuracy. The three-stage interception with progressively increasing interception intensity improves the filtration effect and facilitates smooth airflow, and when a large amount of lint accumulates on the filters, a flushing device can be used to timely wash away the lint on the filters.

Description

Drying apparatus TECHNICAL FIELD

[0001] The present application relates to the technical field of clothes treatment equipment, and specifically provides a drying apparatus. BACKGROUND

[0002] The drying apparatus refers to a machine capable of drying clothes by using hot air. The drying apparatus mainly includes a washing and drying integrated machine, a clothes dryer or a drying machine, etc.

[0003] Taking the washing and drying integrated machine as an example, the existing washing and drying integrated machine on the market mainly adopts an electric heating mode or a heat pump heating mode. No matter which heating mode is selected, the drying process cannot be completed without a circulating air duct. During the drying process, lint on the clothes will fall off and be carried by the fan and attached to the entire air duct.

[0004] In order to avoid the above situation, many washing and drying integrated machines select to set a filtering device in the drying air duct to filter the lint. However, when drying clothes with a large amount of lint such as wool, a large amount of lint will enter the air duct at the same time, causing poor air flow, and seriously affecting the drying efficiency.

[0005] Therefore, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0006] The present application aims to solve the above technical problems, i.e., to solve the problem that the existing drying apparatus causes the lint to block the air duct, resulting in poor air flow and seriously affecting the drying efficiency when drying clothes with a large amount of lint.

[0007] In a first aspect, the present application provides a drying apparatus, comprising:

[0008] a drum module, wherein an air inlet and an air outlet are arranged on the drum module;

[0009] a drying air duct, wherein two ends of the drying air duct are in communication with the air inlet and the air outlet, respectively;

[0010] a heat pump module, wherein an evaporator and a condenser are installed in the drying air duct, and the evaporator is located upstream of the condenser;

[0011] a filtering device, wherein the filtering device comprises a first filter screen, a second filter screen and a third filter screen, the first filter screen and the second filter screen are installed in the drying air duct, the first filter screen is located downstream of the second filter screen, the first filter screen is located upstream of the evaporator, the third filter screen is installed in the air inlet end of the drying air duct or the air outlet, the mesh number of the first filter screen is greater than that of the second filter screen, and the mesh number of the second filter screen is greater than that of the third filter screen; and

[0012] a rinsing device capable of rinsing the first filter screen, the second filter screen and / or the third filter screen.

[0013] In the preferred technical scheme of the above drying apparatus, the rinsing device comprises a first rinsing mechanism capable of rinsing the first filter screen and / or the second filter screen, and a second rinsing mechanism capable of rinsing the third filter screen.

[0014] In the preferred technical scheme of the above drying apparatus, the first rinsing mechanism comprises a water spraying cavity arranged on the drying air duct and extending above and along the length direction of the first filter screen and / or the second filter screen, and a rinsing filter screen channel, a top end of which is in communication with the water spraying cavity and a bottom end of which is directed towards the first filter screen and / or the second filter screen.

[0015] In the preferred technical scheme of the above drying apparatus, the rinsing filter screen channel comprises a first rinsing filter screen channel and a second rinsing filter screen channel, and the water spraying cavity comprises a first water spraying cavity and a second water spraying cavity separated from each other, a top end of the first rinsing filter screen channel is in communication with the first water spraying cavity and a bottom end of the first rinsing filter screen channel is directed towards the first filter screen, a top end of the second rinsing filter screen channel is in communication with the second water spraying cavity and a bottom end of the second rinsing filter screen channel is directed towards the second filter screen; and / or

[0016] The first rinsing mechanism further comprises a rinsing evaporator channel arranged on the drying air duct, a top end of the rinsing evaporator channel is in communication with the water spraying cavity and a bottom end of the rinsing evaporator channel is directed towards the windward surface of the evaporator.

[0017] In the preferred technical scheme of the above drying apparatus, the filtering device further comprises a first support and a second support, the first filter screen and the second filter screen are both mounted on the second support, a first plug-in interface is arranged on the drying air duct, a second plug-in interface is arranged on the box body of the drying apparatus at a position corresponding to the first plug-in interface, a first end of the first support extends to the second plug-in interface, a second end of the first support is detachably fixedly connected with a first end of the second support, the second support, the first filter screen and the second filter screen sequentially pass through the second plug-in interface and the first plug-in interface and extend into the drying air duct.

[0018] In the preferred technical scheme of the above drying equipment, the second support comprises a first filter screen support and a second filter screen support, the second end of the first filter screen support is provided with a cylindrical structure, both ends of the cylindrical structure are provided with connecting shafts, the second filter screen support is provided with a circular arc surface corresponding to the cylindrical structure and matching the cylindrical structure at a position corresponding to the connecting shafts, the second filter screen support is provided with connecting holes at positions corresponding to the connecting shafts, the connecting shafts are located in the connecting holes and can rotate in the connecting holes, the cylindrical structure is matched with the circular arc surface, the first end of the first filter screen support and / or the second filter screen support is in detachable fixed connection with the first support, and the first filter screen and the second filter screen are respectively installed on the first filter screen support and the second filter screen support.

[0019] In the preferred technical scheme of the above drying equipment, the second filter screen support is provided with a containing cavity, the first filter screen support is located in the containing cavity, and the first filter screen support is provided with a strip-shaped convex rib extending along the length direction of the first filter screen support, and the strip-shaped convex rib is matched with the inner wall of the containing cavity.

[0020] In the preferred technical scheme of the above drying equipment, the filtering device further comprises a ring-shaped support, the ring-shaped support is in detachable fixed connection with the drying air duct or the cylinder module, and the third filter screen is installed on the ring-shaped support.

[0021] In the preferred technical scheme of the above drying equipment, the second flushing mechanism comprises a spray pipe, the spray pipe is provided with a water inlet and a water outlet, the spray pipe is installed on the drying air duct, and the water outlet is located in the drying air duct and faces the third filter screen.

[0022] In the preferred technical scheme of the above drying equipment, the drying air duct comprises a first drying air duct and a second drying air duct located above the cylinder module, the first drying air duct and the second drying air duct are respectively in communication with the air suction port and the air exhaust port of the fan of the drying equipment, the first drying air duct and the second drying air duct are arranged in an L shape, the evaporator, the first filter screen and the second filter screen are arranged in the first drying air duct, the condenser is arranged in the second drying air duct, the first drying air duct is in communication with the air outlet, and the second drying air duct is in communication with the air inlet.

[0023] In the technical scheme, the third filter screen, the second filter screen and the first filter screen are arranged in sequence along the flow direction of the airflow, the third filter screen is arranged in the air inlet end of the drying air duct or the air outlet of the cylinder module, most of the thread scraps are blocked by the third filter screen, only a small amount of thread scraps can enter the drying air duct, and the third filter screen has the least mesh number, which is beneficial to reducing the influence on the airflow flow, the second filter screen and the third filter screen are arranged in the drying air duct, the first filter screen at the most downstream has the most mesh number, most of the thread scraps entering the drying air duct are intercepted by the second filter screen, even if a small amount of thread scraps pass through the second filter screen, the first filter screen with higher filtering precision can also intercept the thread scraps, the thread scraps and other impurities are intercepted in three ways, and the interception strength is increased in sequence, so that the filtering effect is improved, and the airflow is smooth, in addition, the flushing device is arranged to flush the filter screen, when the thread scraps on the filter screen are accumulated, the thread scraps on the filter screen can be flushed away in time by the flushing device, so that the drying efficiency is not affected.

[0024] Further, the first flushing mechanism and the second flushing mechanism are arranged to flush the corresponding filter screens respectively, so that the thread scraps on the respective filter screens can be controlled independently, for example, if the thread scraps on the first filter screen are less and the thread scraps on the third filter screen are more, only the second flushing mechanism can be started to flush the third filter screen, and the first flushing mechanism is still in the closed state, so that the waste of water resources is avoided.

[0025] Further, the first flushing structure is arranged in the structure form of the water spraying cavity and the flushing filter screen channel, the water in the water spraying cavity is sprayed to the filter screen through the flushing filter screen channel, and the flushing filter screen channel can accelerate the water flow, so that the flushing effect of the filter screen is improved.

[0026] Further, the first water spraying cavity and the second water spraying cavity are arranged to be separated, and the first flushing filter screen channel and the second flushing filter screen channel are arranged to be in communication with the first water spraying cavity and the second water spraying cavity respectively, so that the thread scraps on the first filter screen and the second filter screen can be controlled independently, and the respective independent flushing is beneficial to ensuring the water flow, so that the flushing filter screen channel has sufficient spraying pressure, and the flushing effect of the filter screen is ensured.

[0027] Further, the flushing evaporator channel is arranged to flush the windward surface of the evaporator, the thread scraps accumulated on the windward surface of the evaporator are flushed away, the airflow flows through the evaporator smoothly, and the drying efficiency is further improved.

[0028] Further, the first support and the second support of the filtering device are arranged to be detachable, so that the required disassembly space is reduced, and the filter screen on the second support is convenient to clean.

[0029] Further, the present application can better block lint by matching the cylindrical structure on the first filter frame with the arc surface on the second filter frame, and further improve the filtering effect.

[0030] Further, the present application can better block lint by matching the strip-shaped protrusions on the first filter frame with the inner walls of the accommodating cavities on the second filter frame, and further improve the filtering effect.

[0031] Further, the present application can facilitate the dismounting of the third filter for cleaning, maintenance or replacement by mounting the third filter on the annular support and detachably mounting the annular support on the drying air duct or the drum module. BRIEF DESCRIPTION OF DRAWINGS

[0032] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0033] Fig. 1 is a schematic diagram of the overall structure of the washing-drying integrated machine of the present application (omitting the top plate of the cabinet);

[0034] Fig. 2 is a schematic diagram of the structure of the heat pump system in the washing-drying integrated machine of the present application;

[0035] Fig. 3 is a schematic diagram of the structure of the heat pump system in the washing-drying integrated machine of the present application;

[0036] Fig. 4 is a schematic diagram of the structure of the outer shell and the second support of the filtering device in the washing-drying integrated machine of the present application;

[0037] Fig. 5 is a schematic diagram of the assembly of the first support, the second support and the locking pin of the filtering device in the washing-drying integrated machine of the present application;

[0038] Fig. 6 is a schematic diagram of the structure of the second support and the locking pin in the washing-drying integrated machine of the present application;

[0039] Fig. 7 is a schematic diagram of the structure of the locking pin of the filtering device in the washing-drying integrated machine of the present application;

[0040] Fig. 8 is a schematic diagram of the structure of the first filter frame of the filtering device in the washing-drying integrated machine of the present application;

[0041] Fig. 9 is a schematic diagram of the structure of the second filter frame of the filtering device in the washing-drying integrated machine of the present application;

[0042] Fig. 10 is a schematic diagram of the structure of the annular support of the filtering device in the washing-drying integrated machine of the present application;

[0043] Fig. 11 is a schematic diagram of the structure of the first drying air duct and the second rinsing mechanism in the washing-drying integrated machine of the present application;

[0044] Fig. 12 is a sectional view of A-A in Fig. 11;

[0045] Fig. 13 is an enlarged view of B in Fig. 12;

[0046] Fig. 14 is a structural schematic view of a spray pipe in the laundry dryer according to the present application.

[0047] List of reference signs:

[0048] 1, cabinet; 11, second plug-in port;

[0049] 2, drum module;

[0050] 31, first drying air duct; 311, return air duct; 312, first heat exchange air duct; 313, first connecting air duct; 3121, first plug-in port; 3122, fresh air inlet;

[0051] 32, air fan;

[0052] 33, second drying air duct; 331, second heat exchange air duct; 332, air outlet duct; 333, second connecting air duct; 3321, fresh air outlet; 3331, flow guide structure;

[0053] 34, evaporator; 35, condenser;

[0054] 4, filter device; 41, first support; 42, second support; 43, outer shell; 44, locking pin; 46, third filter screen; 47, annular support; 441, first locking structure; 421, first filter screen support; 422, second filter screen support; 4211, cylindrical structure; 4212, first connecting structure; 4213, strip-shaped protruding rib; 4221, second locking structure; 4222, second connecting structure; 4223, circular arc surface; 4224, accommodating cavity; 471, supporting rib; 472, protruding structure;

[0055] 51, first water spraying cavity; 52, second water spraying cavity; 53, first flushing filter screen passage; 54, second flushing filter screen passage; 55, flushing evaporator passage; 56, first water inlet connector; 57, second water inlet connector; 58, partition structure;

[0056] 6, spray pipe; 61, water inlet; 62, water outlet. DETAILED DESCRIPTION

[0057] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will appreciate that the embodiments are only used to explain the technical principles of the present application, and are not used to limit the protection scope of the present application. Those skilled in the art can make adjustments to them as needed in order to adapt to specific application occasions. For example, although the following is described in combination with the laundry dryer, the technical solutions of the present application are also applicable to other types of drying devices, such as heat pump clothes dryers, etc. Such adjustments and changes to the application objects do not deviate from the principles and scope of the present application, and should be limited within the protection scope of the present application.

[0058] It should be noted that in the description of the present application, the terms "upper", "lower", "front", "rear", "longitudinal", "transverse", "top", "bottom" and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the related devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the ordinal numbers "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0059] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] Referring to FIGS. 1-14, a specific preferred embodiment of the present application is described.

[0061] As shown in FIGS. 1-3, the washing and drying integrated machine of the present application comprises a cabinet 1 and a drum module 2 (also can be called outer drum or washing drum) and a drying system provided in the cabinet 1, the drying system can supply hot air into the drum module 2 to dry the laundry.

[0062] Preferably, as shown in FIGS. 1-3, the drying system of the present application comprises a drying air duct, a heat pump module and a fan 32, the drum module 2 is provided with an air inlet and an air outlet, the two ends of the drying air duct are communicated with the air inlet and the air outlet respectively, the heat pump module comprises an evaporator 34 and a condenser 35 installed in the drying air duct, the evaporator 34 is located upstream of the condenser 35, under the action of the fan 32, the airflow can circulate in the drying air duct and the drum module 2, and exchange heat with the evaporator 34 and the condenser 35 when flowing through the evaporator 34 and the condenser 35.

[0063] Preferably, as shown in FIGS. 1-3, the drying air duct of the present application comprises a first drying air duct 31 and a second drying air duct 33, the first drying air duct 31, the fan 32 and the second drying air duct 33 are connected in sequence, the evaporator 34 is arranged in the first drying air duct 31, the condenser 35 is arranged in the second drying air duct 33, the first drying air duct 31 is communicated with the air outlet on the drum module 2, and the second drying air duct 33 is communicated with the air inlet on the drum module 2.

[0064] In this embodiment, the wet hot air in the drum module 2 circulates under the action of the fan 32, enters the first drying air duct 31, the second drying air duct 33 and the drum module 2 in sequence through the air outlet on the drum module 2, and under the action of the evaporator 34, the moisture in the wet hot air is condensed and separated from the airflow, and under the action of the condenser 35, the temperature of the air is raised to supply hot air to the drum module 2, realizing drying of the clothes in the drum module 2, and further realizing drying of the clothes.

[0065] It should be noted that the drying air duct of the present application is not limited to the two-section structure described above, and those skilled in the art can also set the drying air duct as a whole section structure in actual application, in which case the fan 32 can be installed on the air outlet or air inlet of the drum module 2, and then the fan is communicated with the air inlet or air outlet through the drying air duct. Of course, the present application preferably sets the drying air duct as the first drying air duct and the second drying air duct described above, and the fan is arranged between the first drying air duct and the second drying air duct.

[0066] In addition, it should be noted that those skilled in the art can also replace the heat pump module with an electric heating device, etc., which is flexible adjustment and change without departing from the principles and scope of the present application, and should be limited within the protection scope of the present application.

[0067] Preferably, as shown in FIG. 1, the first drying air duct 31, the fan 32 and the second drying air duct 33 are all arranged above the drum module 2.

[0068] Preferably, the heat pump module of the present application further comprises a compressor (not shown in the figure), which is arranged below the drum module 2.

[0069] Exemplarily, the compressor is vertically arranged below the left side of the drum module 2, of course, the compressor can also be horizontally arranged, as long as it can be fitted and installed in the lower space between the drum module 2 and the cabinet 1. The compressor, the evaporator 34 and the condenser 35 are communicated with each other to form a refrigerant circulation loop, the refrigerant exchanges heat with the wet hot air flowing through the evaporator 34, so that the moisture in the wet hot air is condensed and separated from the airflow, and the refrigerant exchanges heat with the air flowing through the condenser 35, so that the temperature of the air is raised to supply hot air to the drum module 2.

[0070] Preferably, as shown in FIGS. 1-3, the first drying air duct 31 includes a return air duct 311 and a first heat exchange air duct 312 in communication, the return air duct 311 and the first heat exchange air duct 312 are arranged above the rear of the drum module 2, i.e. close to the rear end of the drum module 2, the evaporator 34 is arranged in the first heat exchange air duct 312, and the air outlet is arranged above the rear of the drum module 2, i.e. close to the rear end of the drum module 2, so as to facilitate the communication between the return air duct 311 and the air outlet. The first heat exchange air duct 312 extends in the horizontal direction, and the extension direction of the first heat exchange air duct 312 is perpendicular to the axis direction of the drum module 2.

[0071] Preferably, the return air duct 311 and the first heat exchange air duct 312 are arranged in detachable fixed connection.

[0072] Further, as shown in FIGS. 1-3, the second drying air duct 33 includes a second heat exchange air duct 331 and an air outlet duct 332 in communication, the air outlet duct 332 and the second heat exchange air duct 331 are arranged above the left or right of the drum module 2, the condenser 35 is arranged in the second heat exchange air duct 331, the air inlet is arranged above the front of the drum module 2, i.e. close to the front end of the drum module 2, and the air outlet duct 332 is in communication with the air inlet. The second heat exchange air duct 331 also extends in the horizontal direction, and the extension direction of the second heat exchange air duct 331 is parallel to the axis direction of the drum module 2, that is, the extension direction of the second heat exchange air duct 331 is perpendicular to the extension direction of the first heat exchange air duct 312, and the two heat exchange air ducts are arranged in an approximate L shape.

[0073] Preferably, the second heat exchange air duct 331 and the air outlet duct 332 are arranged in detachable fixed connection.

[0074] The present embodiment is directed to the structural characteristics of the space above the drum module 2 in the cabinet 1. Specifically, taking a drum-type washing and drying integrated machine as an example, a laundry treatment agent dispensing box needs to be arranged in the left upper front end space, and correspondingly, the rear upper space and the right upper space have certain idle space. Therefore, the washing and drying integrated machine of the present embodiment sets the first drying air duct 31 in the rear upper space, sets the second drying air duct 33 in the right upper space, and sets the fan 32 between the first drying air duct 31 and the second drying air duct 33, at the corner of the right upper space. From the overall layout, the first drying air duct 31, the fan 32 and the second drying air duct 33 are vertically distributed as a whole, which can maximize the use of the idle space, and at the same time, can also ensure that the overall height dimension of the washing and drying integrated machine remains unchanged.

[0075] It should be noted that the front end of the drum module 2 has a clothes taking and placing opening, which can be regarded as an air inlet by those skilled in the art, even if the air outlet air duct 332 communicates with the clothes taking and placing opening, or a separate air inlet can be separately provided above the front end of the drum module 2 as an air inlet, and the like. The adjustment and change of the specific setting form of the air inlet do not deviate from the principles and scope of the present application, and should be limited within the protection scope of the present application.

[0076] Further, in order to improve the heat exchange efficiency as much as possible in a limited space and ensure the drying effect, it is necessary to increase the heat exchange main bodies of the evaporator 34 and the condenser 35 as much as possible. Therefore, the first heat exchange air duct 312 and the second heat exchange air duct 331 have an external contour adapted to the space where they are located, so that the heat exchange main bodies of the evaporator 34 contained in the first heat exchange air duct 312 and the condenser 35 contained in the second heat exchange air duct 331 can be increased as much as possible.

[0077] Specifically, as shown in FIGS. 1 and 2, the first heat exchange air duct 312 is arranged above the rear of the drum module 2 and is located at the middle position of the drum module 2. Since the drum module 2 is a cylindrical structure, the middle position of the cylindrical structure is substantially in a plane. Therefore, the first heat exchange air duct 312 is substantially rectangular in structure, that is, the first heat exchange air duct 312 is substantially flat, and the cross section is approximately rectangular. Correspondingly, the heat exchange main bodies of the evaporator 34 inside the first heat exchange air duct 312 are arranged in a regular rectangular shape. The second heat exchange air duct 331 is arranged above the right of the drum module 2. In order to adapt to the cylindrical structure of the drum module 2 and make full use of the space, the second heat exchange air duct 331 is arranged in a non-rectangular structure, that is, in this part of the space, the second heat exchange air duct 331 is arranged in a "7" shape, that is, in a structure with a wide upper part and a narrow lower part. The surface of the second heat exchange air duct 331 near the drum module 2 is arranged as an inner concave arc surface, which is coaxial with the drum module 2. Correspondingly, the heat exchange main bodies of the condenser 35 inside the second heat exchange air duct 331 are also arranged in a "7" shape.

[0078] It should be noted that the shapes of the first heat exchange air duct 312 and the second heat exchange air duct 331 and the arrangement shapes of the heat exchange main bodies of the evaporator 34 and the condenser 35 inside them described above are only exemplary. Those skilled in the art can also arrange them in other shapes according to actual conditions, as long as the space between the cabinet 1 and the drum module 2 can be fully utilized, the bottom contour of the first heat exchange air duct 312 and the second heat exchange air duct 331 matches the drum wall contour of the drum module 2, and the heat exchange main bodies inside the heat exchange air duct can maximize the heat exchange efficiency. The present application does not make any limitation in this regard.

[0079] Further, the fan 32 is arranged at the upper right corner, and in order to make full use of the space, the fan 32 is arranged vertically, the central axis of the air inlet of the fan 32 (i.e. the axis of the impeller of the fan 32) extends horizontally along the box 1 transversely, i.e. perpendicular to the axial direction of the drum module 2, and the central axis of the air outlet of the fan 32 (the central axis of the air outlet of the fan 32 is perpendicular to the axis of the impeller of the fan 32) extends horizontally along the box 1 longitudinally, i.e. parallel to the axial direction of the drum module 2, that is, the central axis of the air inlet of the fan 32 extends in the same direction as the first heat exchange air duct 312, and the central axis of the air outlet of the fan 32 extends in the same direction as the second heat exchange air duct 331, the first drying air duct 31 communicates with the air inlet of the fan 32, and the second drying air duct 33 communicates with the air outlet of the fan 32, so that the first drying air duct 31 and the second drying air duct 33 are vertically distributed with the fan 32 as the center, and the space between the box 1 and the drum module 2 can be used to the maximum extent, so as to further ensure that the overall height of the washing and drying integrated machine remains unchanged.

[0080] In addition, the return air duct 311 and the outlet air duct 332 are also arranged in a form that can make full use of the space between the box 1 and the drum module 2, and specifically, as shown in FIGS. 2 and 3, the return air duct 311 and the outlet air duct 332 are both arranged in a bent structure, and the surface close to the drum module 2 is arranged as a concave arc surface, which is matched with the surface of the drum wall of the drum module 2. Preferably, the return air duct 311 and the outlet air duct 332 are both made of flexible material, such as rubber pipe.

[0081] Further, the return air duct 311, the first heat exchange air duct 312, the fan 32, the second heat exchange air duct 331 and the outlet air duct 332 all have a spacing with the drum wall of the drum module 2, so as to ensure a safe distance with the drum module 2 and ensure normal operation.

[0082] Preferably, as shown in FIGS. 2 and 3, the first drying air duct 31 of the present application further comprises a first connecting air duct 313, the first end of the first connecting air duct 313 communicates with the first heat exchange air duct 312, and the second end of the first connecting air duct 313 communicates with the air inlet of the fan 32. The diameter of the first connecting air duct 313 gradually narrows from the first end to the second end, so that the air can be concentrated to the air inlet of the fan 32.

[0083] Preferably, the extension direction of the first connecting air duct 313 is consistent with the extension direction of the first heat exchange air duct 312. It should be noted that the first connecting air duct 313 and the first heat exchange air duct 312 can be fixedly connected, or can be integrally arranged.

[0084] Preferably, as shown in FIG. 2 and FIG. 3, the second drying air duct 33 of the present application further comprises a second connecting air duct 333, a first end of the second connecting air duct 333 is in communication with the air outlet of the air blower 32, and a second end of the second connecting air duct 333 is in communication with the second heat exchange air duct 331. The caliber of the second connecting air duct 333 gradually widens from the first end of the second connecting air duct 333 to the second end of the second connecting air duct 333, so that the air flowing out of the air outlet of the air blower 32 can diffuse into the second heat exchange air duct 331.

[0085] Preferably, the extending direction of the second connecting air duct 333 is consistent with the extending direction of the second heat exchange air duct 331. It should be noted that the second connecting air duct 333 and the second heat exchange air duct 331 can be fixedly connected, or can be integrally provided.

[0086] Further, as shown in FIG. 3, the drying system of the present application further comprises a flow guide structure 3331 provided in the second drying air duct 33, and the flow guide structure 3331 is located upstream of the condenser 35.

[0087] Exemplarily, the flow guide structure 3331 is provided in the second connecting air duct 333, and the flow guide structure 3331 has a flow guiding effect on the air, so that the air flowing out of the air outlet of the air blower 32 can uniformly diffuse into the second heat exchange air duct 331, so that the air can uniformly flow through the condenser 35, avoiding the air gathering in a certain area of the condenser 35, realizing uniform heat exchange, and ensuring the heat exchange efficiency.

[0088] Preferably, as shown in FIG. 3, the flow guide structure 3331 is provided in the form of a plate structure.

[0089] Preferably, the flow guide structure 3331 extends from the air inlet end of the second connecting air duct 333 to the windward end surface of the condenser 35.

[0090] It should be noted that each flow guide structure 3331 can be a curved plate structure or a straight plate structure.

[0091] Preferably, as shown in FIG. 3, a plurality of flow guide structures 3331 are provided in the second connecting air duct 333, the plurality of flow guide structures 3331 are spaced apart along the direction perpendicular to the flow direction of the air flow, and the plurality of flow guide structures 3331 separate the inside of the second connecting air duct 333 into a plurality of flow guide channels, so that the air flow out of the air outlet of the air blower 32 can flow through the heat exchange main body of the condenser 35 through each flow guide channel respectively, to realize uniform heat exchange.

[0092] Exemplarily, as shown in FIG. 3, the number of flow guide structures 3331 is two, and the two flow guide structures 3331 separate the inside of the second connecting air duct 333 into three flow guide channels.

[0093] Preferably, as shown in FIG. 3, the first drying air duct 31 of the present application is provided with a fresh air inlet 3122, which is located between the evaporator 34 and the fan 32.

[0094] By providing the fresh air inlet 3122 on the first drying air duct 31, during the execution of the drying program, dry outside fresh air can be introduced, which is conducive to improving the drying efficiency. In addition, by locating the fresh air inlet 3122 between the evaporator 34 and the fan 32, more fresh air can be introduced, and the temperature of the incoming fresh air will not be affected by the temperature of the evaporator 34, which is more conducive to improving the drying efficiency.

[0095] Exemplarily, as shown in FIG. 3, the fresh air inlet 3122 is provided on the first connecting air duct 313. Of course, those skilled in the art can also provide the fresh air inlet 3122 on the first heat exchange air duct 312.

[0096] Preferably, as shown in FIG. 3, the second drying air duct 33 is provided with a fresh air outlet 3321, which is located downstream of the condenser 35.

[0097] After the clothes are washed, if the user does not take out the clothes in time, the fan 32 can be started, the compressor is not started, the air flow is circulated in the drum module 2 and the drying air duct, the fresh air continuously enters from the fresh air inlet 3122, and a part of the air flow is discharged from the fresh air outlet 3321 to avoid the risk of excessive air pressure in the drum module 2. In addition, by locating the fresh air outlet 3321 downstream of the condenser 35, the air resistance can be reduced and the assembly is facilitated.

[0098] Preferably, the washing and drying integrated machine of the present application further comprises an exhaust pipe (not shown in the figure) and an electric control valve installed on the exhaust pipe. One end of the exhaust pipe communicates with the fresh air outlet 3321, the other end of the exhaust pipe communicates with the outside of the cabinet 1, and the electric control valve is used to control the on-off state of the exhaust pipe.

[0099] By providing the exhaust pipe in communication with the fresh air outlet 3321, the humid air discharged from the fresh air outlet 3321 can be directly guided to the outside of the cabinet 1, avoiding excessive humidity inside the cabinet 1. In addition, when it is not necessary to discharge air through the fresh air outlet 3321, the electric control valve is in the closed state.

[0100] Preferably, as shown in FIGS. 1 and 2, the washing and drying integrated machine of the present application further comprises a filtering device 4, at least a part of the filtering device 4 is installed in the drying air duct, and the filtering device 4 is used to filter the air flow in the drying air duct to filter out the lint and other impurities carried by the air flow.

[0101] It should be noted that the skilled in the art can fix the filter device 4 in the drying air duct, or can insert the filter device 4 into the drying air duct in a plug-in manner, and the like, and the adjustment and change of the specific setting mode of the filter device 4 do not deviate from the principles and scope of the present application, and should be limited within the protection scope of the present application.

[0102] Specifically, the filter device 4 is installed in the first drying air duct 31 and located upstream of the evaporator 34.

[0103] Preferably, as shown in FIG. 2, the drying air duct is provided with a first plug-in port 3121, and a part of the filter device 4 extends into the drying air duct through the first plug-in port 3121.

[0104] Specifically, the first plug-in port 3121 is arranged in the first drying air duct 31, and specifically, the first plug-in port 3121 is arranged in the first heat exchange air duct 312.

[0105] Preferably, as shown in FIG. 1 and FIG. 2, the box body 1 is provided with a second plug-in port 11 at a position corresponding to the first plug-in port 3121, and the filter device 4 extends to the second plug-in port 11.

[0106] When the filter device 4 needs to be cleaned, the user can directly pull out the filter device 4 from the second plug-in port 11, and after cleaning, the filter device 4 is sequentially inserted into the drying air duct through the second plug-in port 11 and the first plug-in port 3121.

[0107] Preferably, as shown in FIG. 1 to FIG. 5, the filter device 4 of the present application comprises a shell 43 and a filter assembly installed in the shell 43, the filter assembly can move relative to the shell 43 along the length direction of the shell 43, the shell 43 is fixedly installed between the box body 1 and the first drying air duct 31, both ends of the shell 43 are in communication with the first plug-in port 3121 and the second plug-in port 11 respectively, a first end of the filter assembly extends to the second plug-in port 11, and a part of the filter assembly extends into the first drying air duct 31 through the first plug-in port 3121.

[0108] When the filter device 4 needs to be cleaned, only the filter assembly needs to be pulled out, and the shell 43 is fixed.

[0109] Preferably, as shown in FIGS. 3-5, the filter assembly of the present application comprises a first bracket 41, a second bracket 42, and a filter screen (not shown) mounted on the second bracket 42, the first bracket 41 and the second bracket 42 are distributed along the insertion direction, which is along the length direction of the shell 43 as viewed from the drawing, the first end of the first bracket 41 extends to the second insertion port 11, the second end of the first bracket 41 is detachably fixedly connected with the first end of the second bracket 42, and the second bracket 42 and the filter screen successively pass through the second insertion port 11 and the first insertion port 3121 to extend into the first drying air duct 31 and be located upstream of the evaporator 34.

[0110] The filter screen is used to filter the airflow in the first drying air duct 31 and trap impurities such as lint carried by the airflow. By providing the insertion ports on the cabinet 1 and the first drying air duct 31, the filter assembly can be pulled out of the first drying air duct 31 and the cabinet 1 when cleaning of the filter device 4 is required. In addition, by providing the first bracket 41 and the second bracket 42 in detachable connection, after the first bracket 41 is pulled out, the first bracket 41 and the second bracket 42 are detached, and then the second bracket 42 is pulled out, the required disassembly space can be reduced, the user can disassemble more easily, and the filter screen on the second bracket 42 can be cleaned more easily. In addition, by making the two ends of the shell 43 communicate with the first insertion port 3121 and the second insertion port 11 respectively, the filter assembly can be smoothly inserted into the first drying air duct 31 when the filter assembly is installed, and the user experience is better.

[0111] Exemplarily, as shown in FIGS. 1-3, the first insertion port 3121 is provided on the side wall of the first heat exchange air duct 312 facing the front panel of the cabinet 1, the second insertion port 11 is provided on the front panel of the cabinet 1, and the extension direction of the filter assembly of the filter device 4 is parallel to the axis of the drum module 2. In this way, the user can pull out the filter assembly from the front side of the washer-dryer, which is more convenient.

[0112] Preferably, as shown in FIGS. 4-7, the filter device 4 of the present application further comprises a locking pin 44 mounted on the first bracket 41, the locking pin 44 is provided with a first locking structure 441, the second bracket 42 is provided with a second locking structure 4221, the first locking structure 441 cooperates with the second locking structure 4221 to lock the second bracket 42 and the first bracket 41 when the locking pin 44 is in the locking position, and the first locking structure 441 is separated from the second locking structure 4221 when the locking pin 44 is in the unlocking position, so as to detach and separate the second bracket 42 and the first bracket 41.

[0113] Exemplarily, the first support 41 is provided with a vertically extending accommodating cavity (not shown in the figure), the top of the accommodating cavity is provided in an open manner, the locking pin 44 is installed in the accommodating cavity and can move up and down in the vertical direction to switch between the locking position and the unlocking position, the first locking structure 441 includes two locking hooks which are spaced apart in the vertical direction, the second locking structure 4221 includes two locking holes provided at the ends of the second support 42, the locking holes are matched with the locking hooks, a return spring (not shown in the figure) is installed between the bottom of the locking pin 44 and the accommodating cavity, under the action of the return spring, the two locking hooks are respectively inserted into the corresponding locking holes to lock the first support 41 and the second support 42, when it is needed to disassemble the two supports, the locking pin 44 is pressed downward to separate the locking hooks from the locking holes, so that the first support 41 and the second support 42 can be disassembled.

[0114] It should be noted that the first locking structure 441 and the second locking structure 4221 are not limited to the structure that the locking hooks are matched with the locking holes, for example, two opposite locking hooks can also be provided, and the specific structure of the first locking structure 441 and the second locking structure 4221 is adjusted and changed, which does not deviate from the principles and scope of the present application, and should be limited within the protection scope of the present application.

[0115] Preferably, as shown in Figures 5 and 6, the second support 42 includes a first filter screen support 421 and a second filter screen support 422, the first filter screen support 421 and / or the second filter screen support 422 are detachably fixedly connected with the second end of the first support 41, the second end of the first filter screen support 421 is pivotally connected with the second end of the second filter screen support 422, the filter screen includes a first filter screen installed on the first filter screen support 421 and a second filter screen installed on the second filter screen support 422, the mesh number of the first filter screen is greater than that of the second filter screen, and the first filter screen is located downstream of the second filter screen.

[0116] Among them, the first filter screen support 421 and the second filter screen support 422 are arranged side by side along the flow direction of the airflow, the first filter screen support 421 is located downstream of the second filter screen support 422, and the second filter screen and the first filter screen are arranged in sequence along the flow direction of the airflow, the airflow first flows through the second filter screen for rough filtering and then flows through the first filter screen for fine filtering, so that the filtering effect is better, and in addition, the first filter screen support 421 and the second filter screen support 422 are pivotally connected, so that the first filter screen and the second filter screen are convenient to clean.

[0117] Exemplarily, as shown in FIGS. 6 and 7, the second locking structure 4221 is arranged at the first end of the second filter screen frame 422, the end face of the first support 41 close to the second support 42 has a socket (not shown in the drawings), the first end of the second filter screen frame 422 penetrates into the first support 41 through the socket, the second end of the first filter screen frame 421 does not penetrate through the socket, and the second end of the first filter screen frame 421 is located outside the first support 41, that is, the length of the first filter screen frame 421 is less than the length of the second filter screen frame 422.

[0118] It should be noted that, in actual application, the first end of the first filter screen frame 421 can also be detachably fixedly connected with the first support 41, or the first end of the first filter screen frame 421 and the first end of the second filter screen frame 422 can both be detachably fixedly connected with the second end of the first support 41.

[0119] Preferably, as shown in FIGS. 8 and 9, the second end of the first filter screen frame 421 of the present application is provided with a cylindrical structure 4211, the two ends of the cylindrical structure 4211 are both provided with a first connecting structure 4212, the second filter screen frame 422 is provided with a second connecting structure 4222 at a position corresponding to the first connecting structure 4212, the first filter screen frame 421 and the second filter screen frame 422 are pivotally connected through the first connecting structure 4212 and the second connecting structure 4222, the second filter screen frame 422 is provided with an arc surface 4223 corresponding to the cylindrical structure 4211 at a position corresponding to the cylindrical structure 4211, and the cylindrical structure 4211 is attached to the arc surface 4223.

[0120] By attaching the cylindrical structure 4211 on the first filter screen frame 421 to the arc surface 4223 on the second filter screen frame 422, it is more conducive to blocking impurities such as wire scraps and improving the filtering effect.

[0121] Exemplarily, the first connecting structure 4212 is a connecting shaft, one connecting shaft is arranged at the top end of the cylindrical structure 4211 and the other connecting shaft is arranged at the bottom end of the cylindrical structure 4211, the second connecting structure 4222 is a connecting hole, and the two connecting shafts are respectively located in the corresponding connecting holes and can rotate in the connecting holes, so as to realize the pivotal connection of the first filter screen frame 421 and the second filter screen frame 422.

[0122] It should be noted that, in actual application, the first connecting structure 4212 can also be arranged as a connecting hole, and correspondingly, the second connecting structure 4222 can be arranged as a connecting shaft.

[0123] Preferably, as shown in FIGS. 8 and 9, the second filter screen frame 422 is provided with a containing cavity 4224, and the first filter screen frame 421 is located in the containing cavity 4224. That is, the first filter screen frame 421 is embedded in the containing cavity 4224.

[0124] It should be noted that the first filter screen frame 421 can be located in the receiving cavity 4224 on the second filter screen frame 422, or only the part of the first filter screen frame 421 provided with the first filter screen can be located in the receiving cavity 4224 on the second filter screen frame 422, and the like, which is flexible adjustment and change and does not deviate from the principles and scope of the present application, and should be limited within the protection scope of the present application.

[0125] Preferably, as shown in FIGS. 8 and 9, the first filter screen frame 421 is provided with a strip-shaped protruding rib 4213 extending along the length direction thereof, and the strip-shaped protruding rib 4213 is attached to the inner wall of the receiving cavity 4224.

[0126] By providing the strip-shaped protruding rib 4213 on the first filter screen frame 421 attached to the inner wall of the receiving cavity 4224 on the second filter screen frame 422, the lint and impurities are more easily blocked, and the filtering effect is further improved.

[0127] Exemplarily, as shown in FIG. 8, the strip-shaped protruding rib 4213 is provided on the top of the first filter screen frame 421. It should be noted that the strip-shaped protruding rib 4213 can also be provided on the bottom of the first filter screen frame 421.

[0128] In addition, it should be further noted that the outer shell 43 can also be cancelled in actual application by those skilled in the art, or the first support 41 can also be cancelled, in which case the second support 42 and the filter screen can be inserted into the drying air duct from the back or top of the cabinet 1, or the first support 41 and the second support 42 can also be cancelled, in which case the filter screen can be directly fixed and installed in the drying air duct, and the like, which is also within the protection scope of the present application.

[0129] Preferably, as shown in FIG. 10, the filtering device of the present application further comprises a third filter screen 46, which is installed in the air inlet end or air outlet of the drying air duct, and the mesh number of the third filter screen 46 is smaller than that of the second filter screen.

[0130] That is, the third filter screen 46 is located upstream of the second filter screen, and the airflow from the drum module 2 flows through the third filter screen 46, the second filter screen and the first filter screen in sequence, and the mesh numbers of the third filter screen 46, the second filter screen and the first filter screen increase in sequence.

[0131] Among them, the mesh number of the first filter screen is greater than 80 and not greater than 160, the mesh number of the second filter screen is greater than 40 and less than 80, and the mesh number of the third filter screen 46 is not less than 10 and not greater than 40. Exemplarily, the mesh number of the first filter screen is 150, the mesh number of the second filter screen is 60, and the mesh number of the third filter screen 46 is 30.

[0132] It should be noted that the third filter screen 46 can be installed in the air outlet of the drum module 2, or the third filter screen 46 can also be installed at the air inlet end of the drying air duct, specifically at the air inlet end of the first drying air duct 31, and more specifically at the air inlet end of the return air duct 311.

[0133] Preferably, as shown in FIG. 10, the screen surface of the third filter screen 46 is a flat surface or is convex toward the downstream of the third filter screen 46.

[0134] Through the above arrangement, the lint can be prevented from accumulating at the downstream position of the third filter screen 46.

[0135] Preferably, as shown in FIG. 10, the screen surface of the third filter screen 46 is a flat surface or is convex toward the downstream of the third filter screen 46.

[0136] Preferably, as shown in FIG. 10, the filtering device of the present application further comprises a ring-shaped support 47, which is detachably fixedly connected with the drying air duct or the drum module, and the third filter screen 46 is installed on the ring-shaped support 47.

[0137] By installing the third filter screen 46 on the ring-shaped support 47 and detachably fixedly connecting the ring-shaped support 47 with the drying air duct or the drum module, the third filter screen 46 can be easily detached for cleaning.

[0138] For example, when the ring-shaped support 47 is installed in the air outlet of the drum module 2, the ring-shaped support 47 can be directly inserted into the air outlet from the inside or outside of the drum module 2, and the shape of the ring-shaped support 47 matches the shape of the air outlet.

[0139] Preferably, as shown in FIG. 10, the ring-shaped support 47 is provided with a support rib 471 at the position where the third filter screen 46 is arranged.

[0140] By arranging the support rib 471 at the position where the third filter screen 46 is arranged, the flatness of the third filter screen 46 can be improved, and the filtering effect can be ensured.

[0141] Preferably, as shown in FIG. 10, the support rib 471 is provided with a protruding structure 472 extending along the axis direction of the ring-shaped support 47.

[0142] By arranging the protruding structure 472 on the support rib 471, the ring-shaped support 47 can be easily installed and detached, and specifically, the user can pinch the protruding structure 472 with his hand when installing and detaching the ring-shaped support 47, which is more convenient.

[0143] It should be noted that the protruding structure 472 can be arranged in the form of a plate, a column or a block, and the like, and such adjustment and change of the specific shape of the protruding structure 472 do not deviate from the principles and scope of the present application, and should be limited within the protection scope of the present application.

[0144] Preferably, as shown in FIGS. 11-14, the washing and drying integrated machine of the present application further comprises a flushing device capable of flushing the first filter screen, the second filter screen and / or the third filter screen 46.

[0145] In practical application, the flushing device can be configured to flush only one of the first filter screen, the second filter screen and the third filter screen 46, or only two of the first filter screen, the second filter screen and the third filter screen 46, or all of the first filter screen, the second filter screen and the third filter screen 46.

[0146] By providing the flushing device, the filter screens can be periodically flushed, avoiding the situation that lint is not cleaned in time, and in addition, the number of times of disassembly and cleaning by the user can be reduced, improving the user experience.

[0147] Preferably, as shown in FIGS. 11-14, the flushing device of the present application comprises a first flushing mechanism capable of flushing the first filter screen and / or the second filter screen, and a second flushing mechanism capable of flushing the third filter screen 46.

[0148] By providing two flushing mechanisms, it is convenient to independently control according to the amount of lint on each filter screen. The first flushing mechanism and the second flushing mechanism can be communicated with the same water source, or each can be equipped with an independent water source.

[0149] Preferably, as shown in FIGS. 11-13, the first flushing mechanism comprises a water spraying cavity provided on the drying air duct and a flushing filter screen channel, the water spraying cavity is located above the first filter screen and / or the second filter screen and extends along the length direction of the first filter screen and / or the second filter screen, the top end of the flushing filter screen channel is communicated with the water spraying cavity, and the bottom end of the flushing filter screen channel is directed towards the first filter screen and / or the second filter screen.

[0150] The water spraying cavity and the flushing filter screen channel are provided at the top of the first heat exchange air duct 312 of the first drying air duct 31, the water spraying cavity is in a strip shape and is located above the second bracket 42 of the filter device, the water spraying cavity is communicated with a water source, when the first filter screen and / or the second filter screen need to be cleaned, water is supplied to the water spraying cavity through the water source, and the water in the water spraying cavity is sprayed onto the first filter screen and / or the second filter screen through the flushing filter screen channel. The water source can be a water storage tank installed in the cabinet of the washing and drying integrated machine, a water pump is provided in the water tank, and the water outlet end of the water pump is communicated with the water spraying cavity of the first flushing mechanism through a water pipe.

[0151] It should be noted that in order to facilitate the discharge of water and lint, a drain port is provided at the bottom of the drying air duct, the drain port is connected to a water drainage pipeline, and when the filter screen and / or the evaporator are cleaned, water and lint can enter the water drainage pipeline through the drain port and be discharged.

[0152] In addition, it should be noted that the first flushing mechanism can be integrated with the drying air duct, or can be a separate component and then fixedly installed on the drying air duct, and the like, and such flexible adjustment and change does not deviate from the principles and scope of the present application, and should be limited within the protection scope of the present application.

[0153] It should be noted that the shape of the flushing filter screen channel is not limited, for example, the flushing filter screen channel can be set as a long strip-shaped channel extending along the length direction of the water spraying cavity, or can be set as a plurality of cylindrical channels, and the like.

[0154] In addition, it should be noted that in actual application, the first flushing mechanism can be set to only spray water towards the first filter screen, or can be set to only spray water towards the second filter screen, or can be set to spray water towards both the first filter screen and the second filter screen.

[0155] Preferably, as shown in FIGS. 11-13, the flushing filter screen channel includes a first flushing filter screen channel 53 and a second flushing filter screen channel 54, the water spraying cavity includes a first water spraying cavity 51 and a second water spraying cavity 52 which are separated, the top end of the first flushing filter screen channel 53 is communicated with the first water spraying cavity 51, and the bottom end of the first flushing filter screen channel 53 is directed towards the first filter screen, the top end of the second flushing filter screen channel 54 is communicated with the second water spraying cavity 52, and the bottom end of the second flushing filter screen channel 54 is directed towards the second filter screen.

[0156] That is, the first water spraying cavity 51 and the second water spraying cavity 52 are not communicated, so that the first flushing filter screen channel 53 and the second flushing filter screen channel 54 can be independently sprayed.

[0157] Exemplarily, the water spraying cavity is provided with a separation structure 58, the separation structure 58 separates the water spraying cavity into the first water spraying cavity 51 and the second water spraying cavity 52, the first water spraying cavity 51 and the second water spraying cavity 52 are distributed along the width direction of the water spraying cavity, the first water spraying cavity 51 and the second water spraying cavity 52 are respectively connected with a first water inlet connector 56 and a second water inlet connector 57, the first water inlet connector 56 and the second water inlet connector 57 are respectively communicated with the same water source through a first water inlet pipe and a second water inlet pipe, a first water inlet valve and a second water inlet valve are respectively arranged on the first water inlet pipe and the second water inlet pipe, and the first water inlet valve and the second water inlet valve are respectively used to control the on-off state of the first water inlet pipe and the second water inlet pipe. The first flushing filter screen channel 53 is located downstream of the first filter screen and is mainly used for flushing the first filter screen, and the second flushing filter screen channel 54 is located upstream of the second filter screen and is mainly used for flushing the second filter screen.

[0158] It should be noted that the first water spraying cavity 51 and the second water spraying cavity 52 can also be completely independent, and the first water spraying cavity 51 and the second water spraying cavity 52 can also be respectively configured with a water source or use the same water source, and respectively configured with an independent water pump, and the like, and such flexible adjustment and change do not deviate from the principles and scope of the present application, and should be limited within the protection scope of the present application.

[0159] In addition, it should be noted that in order to clearly see the structure in the water spraying cavity, the cover at the top of the water spraying cavity is not shown in FIGS. 11 to 13, and the first drying air duct 31 is composed of an upper part and a lower part, and the first flushing mechanism is arranged in the upper part, and only the upper part of the first drying air duct 31 is shown in FIGS. 11 to 13, and it should be noted that the upper part and the lower part of the first drying air duct 31 can be fixedly connected by screws or the like fasteners, or can also be provided as an integral structure.

[0160] Preferably, as shown in FIGS. 11 to 13, the first flushing filter screen channel 53 is cylindrical and in a plurality, and the plurality of first flushing filter screen channels 53 are spaced along the length direction of the first water spraying cavity 51.

[0161] That is, the plurality of first flushing filter screen channels 53 are spaced along the length direction of the first water spraying cavity 51, and the first flushing filter screen channel 53 is cylindrical.

[0162] The cross section of the first flushing filter screen channel 53 can be circular, square, rectangular, or elliptical, and the like.

[0163] Preferably, as shown in FIGS. 11 to 13, the second flushing filter screen channel 54 is cylindrical and in a plurality, and the plurality of second flushing filter screen channels 54 are spaced along the length direction of the second water spraying cavity 52.

[0164] That is, the plurality of second flushing filter screen channels 54 are spaced along the length direction of the second water spraying cavity 52, and the second flushing filter screen channel 54 is cylindrical.

[0165] The cross section of the second flushing filter screen channel 54 can be circular, square, rectangular, or elliptical, and the like.

[0166] Preferably, as shown in FIGS. 11 to 13, the cross-sectional area of the flushing filter screen channel gradually decreases in the direction away from the top end thereof.

[0167] That is, the cross-sectional area of the flushing filter screen channel gradually decreases from the top end to the bottom end of the flushing filter screen channel, which can improve the spraying speed of the water flow, thereby improving the cleaning effect of the first flushing mechanism.

[0168] It should be noted that, in the case where the flushing filter screen channel includes the first flushing filter screen channel 53 and the second flushing filter screen channel 54, only the cross-sectional area of the first flushing filter screen channel 53 can be gradually reduced in the direction away from the top end thereof, or only the cross-sectional area of the second flushing filter screen channel 54 can be gradually reduced in the direction away from the top end thereof, or both the cross-sectional area of the first flushing filter screen channel 53 and the cross-sectional area of the second flushing filter screen channel 54 can be gradually reduced in the direction away from the top end thereof.

[0169] Preferably, as shown in FIGS. 11-13, the angle between the extension line of the flushing filter screen channel and the filtering surface of the first filter screen and / or the second filter screen is not greater than 10°.

[0170] Illustratively, the first filter screen and / or the second filter screen is vertically arranged, and the filter screen surface is also vertical, and the angle between the extension line of the flushing filter screen channel and the filter screen surface is the angle between the extension line of the flushing filter screen channel and the vertical surface, and by limiting this angle, the cleaning area of the first flushing mechanism can be ensured, and the smaller the angle, the larger the cleaning area of the first flushing mechanism.

[0171] For example, the person skilled in the art can set the angle between the extension line of the flushing filter screen channel and the filtering surface of the filtering device to 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, or 10°. Further preferably, the angle between the extension line of the flushing filter screen channel and the vertical plane is not greater than 5°.

[0172] It should be noted that, in the case where the flushing filter screen channel includes the first flushing filter screen channel 53 and the second flushing filter screen channel 54, only the angle between the extension line of the first flushing filter screen channel 53 and the filtering surface of the filtering device can be not greater than 10°, or only the angle between the extension line of the second flushing filter screen channel 54 and the filtering surface of the filtering device can be not greater than 10°, or both the angle between the extension line of the first flushing filter screen channel 53 and the filtering surface of the filtering device and the angle between the extension line of the second flushing filter screen channel 54 and the filtering surface of the filtering device can be not greater than 10°.

[0173] Preferably, as shown in FIGS. 11-13, the first flushing mechanism further includes a flushing evaporator channel 55 arranged on the drying air duct, the top end of the flushing evaporator channel 55 is in communication with the water spraying cavity, and the bottom end of the flushing evaporator channel 55 is directed to the windward surface of the evaporator 34.

[0174] The top end of the flushing evaporator channel 55 is in communication with the first water spraying cavity 51.

[0175] The windward surface of the evaporator 34 is the upstream end surface of the evaporator 34.

[0176] Preferably, as shown in FIGS. 11-13, the angle between the extension line of the flushing evaporator channel 55 and the windward surface of the evaporator is not greater than 10°

[0177] Exemplarily, the windward face of the evaporator is vertically arranged, and the angle between the extension line of the flushing evaporator channel 55 and the windward face is the angle between the extension line of the flushing evaporator channel 55 and the vertical plane. By limiting the angle, the cleaning area of the first flushing mechanism can be ensured. The smaller the angle, the larger the cleaning area of the first flushing mechanism.

[0178] For example, the person skilled in the art can set the angle between the extension line of the flushing evaporator channel 55 and the windward face of the evaporator to 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9° or 10°. Further preferably, the angle between the extension line of the flushing evaporator channel 55 and the vertical plane is not greater than 5°.

[0179] Preferably, as shown in FIGS. 11-13, the flushing evaporator channel 55 is cylindrical and in plurality, and the plurality of flushing evaporator channels 55 are spaced along the length direction of the water spraying cavity.

[0180] That is, the plurality of flushing evaporator channels 55 are spaced along the length direction of the first water spraying cavity 51, and the flushing evaporator channel 55 is cylindrical.

[0181] The cross section of the flushing evaporator channel 55 can be circular, square, rectangular or elliptical, etc.

[0182] Preferably, as shown in FIGS. 11-13, the cross-sectional area of the flushing evaporator channel 55 gradually decreases in the direction away from the top end thereof.

[0183] That is, the cross-sectional area of the flushing evaporator channel 55 gradually decreases from the top end to the bottom end thereof, which can improve the jet speed of the water flow and thus improve the cleaning effect of the first flushing mechanism.

[0184] Preferably, as shown in FIGS. 2 and 14, the second flushing mechanism comprises a spray pipe 6 having a water inlet 61 and a water outlet 62, the spray pipe 6 is installed on the drying air duct, and the water outlet 62 is located in the drying air duct and faces the third filter screen 46.

[0185] Exemplarily, the spray pipe 6 is fixedly installed on the return air duct 311 of the first drying air duct 31, the water inlet 61 of the spray pipe 6 is communicated with a water source through a pipeline, and when the third filter screen 46 needs to be flushed, the water source supplies water to the spray pipe 6, and the water is sprayed to the third filter screen 46 through the water outlet 62.

[0186] Those skilled in the art will appreciate that the features of the various embodiments can be combined with each other in any combination within the scope of the application and form different embodiments. For example, in the claims of the application, any of the claimed embodiments can be used in any combination.

[0187] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will all fall within the protection scope of the present application.

Claims

1. A drying apparatus, characterized by, The dryer comprises: a cylinder module provided with an air inlet and an air outlet; a drying air duct, the two ends of which are respectively communicated with the air inlet and the air outlet; a heat pump module, which comprises an evaporator and a condenser installed in the drying air duct, the evaporator being located upstream of the condenser; a filtering device, which comprises a first filter screen, a second filter screen and a third filter screen, the first filter screen and the second filter screen being installed in the drying air duct, the first filter screen being located downstream of the second filter screen, the first filter screen being located upstream of the evaporator, the third filter screen being installed in the air inlet end of the drying air duct or the air outlet, the mesh number of the first filter screen being greater than that of the second filter screen, the mesh number of the second filter screen being greater than that of the third filter screen; and a flushing device, which is capable of flushing the first filter screen, the second filter screen and / or the third filter screen. The flushing device comprises a first flushing mechanism and a second flushing mechanism, the first flushing mechanism being capable of flushing the first filter screen and / or the second filter screen, the second flushing mechanism being capable of flushing the third filter screen.

2. The drying apparatus according to claim 1, characterized by The first flushing mechanism comprises a water spraying cavity and a flushing filter screen channel arranged on the drying air duct, the water spraying cavity being located above the first filter screen and / or the second filter screen and extending along the length direction of the first filter screen and / or the second filter screen, the top end of the flushing filter screen channel being communicated with the water spraying cavity, the bottom end of the flushing filter screen channel being directed towards the first filter screen and / or the second filter screen.

3. The drying apparatus according to claim 2, characterized in that, The flushing filter screen channel comprises a first flushing filter screen channel and a second flushing filter screen channel, the water spraying cavity comprises a first water spraying cavity and a second water spraying cavity separated from each other, the top end of the first flushing filter screen channel being communicated with the first water spraying cavity, the bottom end of the first flushing filter screen channel being directed towards the first filter screen, the top end of the second flushing filter screen channel being communicated with the second water spraying cavity, the bottom end of the second flushing filter screen channel being directed towards the second filter screen; and / or 4. The drying apparatus according to claim 3, characterized in that, The first flushing mechanism further comprises a flushing evaporator channel arranged on the drying air duct, the top end of the flushing evaporator channel being communicated with the water spraying cavity, the bottom end of the flushing evaporator channel being directed towards the windward surface of the evaporator. The filtering device further comprises a first support and a second support, the first filter screen and the second filter screen are both installed on the second support, the drying air duct is provided with a first plug-in interface, the box body of the drying device is provided with a second plug-in interface at a position corresponding to the first plug-in interface, the first end of the first support extends to the second plug-in interface, the second end of the first support is detachably fixedly connected with the first end of the second support, the second support, the first filter screen and the second filter screen sequentially pass through the second plug-in interface and the first plug-in interface and extend into the drying air duct.

5. The drying apparatus according to claim 1, wherein ​ 6. The drying apparatus according to claim 5, characterized in that, The second support comprises a first filter screen support and a second filter screen support, the second end of the first filter screen support is provided with a cylindrical structure, both ends of the cylindrical structure are provided with connecting shafts, the second filter screen support is provided with a circular arc surface corresponding to the cylindrical structure at a position corresponding to the cylindrical structure, the second filter screen support is provided with connecting holes at positions corresponding to the connecting shafts, the connecting shafts are located in the connecting holes and can rotate in the connecting holes, the cylindrical structure is attached to the circular arc surface, the first end of the first filter screen support and / or the second filter screen support is detachably fixedly connected to the first support, and the first filter screen and the second filter screen are respectively installed on the first filter screen support and the second filter screen support.

7. The drying apparatus according to claim 1, wherein The second filter screen support is provided with a containing cavity, the first filter screen support is located in the containing cavity, and the first filter screen support is provided with a strip-shaped convex rib extending along the length direction of the first filter screen support, and the strip-shaped convex rib is attached to the inner wall of the containing cavity.

8. The drying apparatus according to claim 2, wherein The filter device further comprises an annular support, the annular support is detachably fixedly connected to the drying air duct or the cylinder module, and the third filter screen is installed on the annular support.

9. The drying apparatus according to claim 2, wherein The second flushing mechanism comprises a spray pipe, the spray pipe is provided with a water inlet and a water outlet, the spray pipe is installed on the drying air duct, and the water outlet is located in the drying air duct and faces the third filter screen.

10. The drying apparatus according to any one of claims 1 to 9, characterized in that, The drying air duct comprises a first drying air duct and a second drying air duct located above the cylinder module, the first drying air duct and the second drying air duct are respectively communicated with the air suction port and the air exhaust port of the fan of the drying equipment, the first drying air duct and the second drying air duct are arranged in an L shape, the evaporator, the first filter screen and the second filter screen are arranged in the first drying air duct, the condenser is arranged in the second drying air duct, the first drying air duct is communicated with the air outlet, and the second drying air duct is communicated with the air inlet.

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