CN108797056B

CN108797056B - Heat pump bottom shell and heat pump shell

Info

Publication number: CN108797056B
Application number: CN201710297128.2A
Authority: CN
Inventors: 钱伟; 卢松; 苗雨来
Original assignee: Wuxi Little Swan Electric Co Ltd
Current assignee: Wuxi Little Swan Electric Co Ltd
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2021-08-10
Anticipated expiration: 2037-04-28
Also published as: CN108797056A

Abstract

The invention relates to the technical field of washing machines and discloses a heat pump bottom shell and a heat pump shell, wherein the heat pump bottom shell comprises an air duct (2) with an air suction opening (1), wherein, a plurality of guide plates (30) extending along the air duct (2) are formed at the position of the air duct (2) close to the air suction opening (1), the air duct section of the air duct (2) close to the air suction opening (1) is divided into a plurality of air inlet ducts (29) communicated with the air suction opening (1) by the plurality of guide plates (30), because the air duct section of the air duct is divided into a plurality of air inlet ducts by the plurality of guide plates formed at the position of the air duct close to the air suction opening, in this way, through the plurality of air inlet ducts, the air flow sucked into the air channel from the air suction opening can be rectified, so that the air flow is uniformly and stably distributed into the air channel and uniformly passes through the evaporator, and the utilization rate of the evaporator is greatly improved.

Description

Heat pump bottom shell and heat pump shell

Technical Field

The invention relates to the technical field of washing machines, in particular to a heat pump bottom shell and a heat pump shell for a washing machine.

Background

Along with the improvement of life quality of people, the popularity of various intelligent household appliances such as washing machines is higher and higher. Meanwhile, various types of washing machines such as a drum type washing machine have also appeared. At present, the drying modes of the conventional drum type washing and drying integrated washing machine are classified into a heat pump type and a condensing type.

In practical use, when the drying system of the washing machine operates, the fan of the drying system operates to suck air into the air duct from the air suction opening of the heat pump shell, but due to structural limitation of the air suction opening, the air flow sucked into the air duct only passes through the part of the evaporator arranged in the air duct, so that the heat exchange efficiency is not obvious, and the drying efficiency of the drying system is correspondingly reduced.

In addition, the water inlet system of the conventional drum-type heat pump washing and drying integrated machine is relatively independent and can only realize the water inlet function of the washing machine. The roller type heat pump washing and drying integrated machine needs to be cleaned of the flock after the drying procedure is completed every time or after the roller type heat pump washing and drying integrated machine is used for a period of time, namely, the flock filter screen is manually taken out of the machine, then the flock on the filter screen is cleaned, and the filter screen is installed back to the original position after the cleaning is completed. If the filter screen is not cleaned timely and effectively, the air quantity of the drying external circulation is influenced, and the drying efficiency is reduced.

Disclosure of Invention

The invention provides a heat pump bottom shell which can rectify air flow sucked through an air suction opening, so that the air flow can be uniformly distributed on the section of a whole air channel so as to uniformly pass through an evaporator.

In order to achieve the above object, the present invention provides a heat pump bottom shell, which includes an air duct having an air suction opening, wherein a plurality of guide plates extending along the air duct are formed at a position of the air duct near the air suction opening, and the plurality of guide plates divide an air duct section of the air duct near the air suction opening into a plurality of air inlet ducts communicated with the air suction opening.

Through the technical scheme, the air duct section at the position is divided into the air inlet ducts by the plurality of guide plates formed at the position, close to the air suction inlet, of the air duct, so that the air flow sucked into the air duct from the air suction inlet can be rectified through the plurality of air inlet ducts, is uniformly and stably distributed into the air duct and uniformly passes through the evaporator, and the utilization rate of the evaporator is greatly improved.

Further, the plate surfaces of the plurality of air deflectors are arranged along the height direction of the heat pump bottom shell.

Furthermore, a pipe connecting section extending obliquely downwards extends out of the outer part of the bottom shell of the heat pump at the air suction opening.

Further, following the direction of the distinguished and admirable wind, the wind channel is including the straight portion that is used for setting up the evaporimeter and the lower recess that is used for setting up the condenser, the heat pump drain pan include with the lower recess is connected and can be located the fan unit mount location between washing machine's cylinder side and the washing machine box, wherein, the lower recess with fan unit mount location and the passageway between the two form U-shaped air-out end, straight portion the lower recess with fan unit mount location sets up the upper portion that sets up evaporimeter, condenser and the fan unit for the installation and is located same horizontal plane.

In addition, the invention provides a heat pump shell, which comprises a heat pump cover plate and any one of the heat pump bottom shells, wherein the heat pump cover plate covers the heat pump bottom shell to form the air duct between the heat pump cover plate and the heat pump bottom shell.

Therefore, as mentioned above, the air flow entering the air duct through the air suction opening can be uniformly and stably distributed in the air duct and uniformly passes through the evaporator, so that the utilization rate of the evaporator is greatly improved.

Further, a portion of the heat pump bottom case extends downward to form a bottom case slope, and a portion of the heat pump cover plate extends downward to form a cover plate slope corresponding to the bottom case slope, wherein a lower recess portion for disposing a condenser is formed between the bottom case slope and the cover plate slope.

Further, the heat pump cover plate is a flat plate.

In addition, a filter screen mounting part is formed in the air duct; a water inlet channel is formed on the heat pump cover plate, and a water inlet structure is arranged on the water inlet channel; wherein, the structure of intaking is close to the filter screen installation department sets up, makes the structure spun hydroenergy of intaking can be right install filter screen on the filter screen installation department washs.

Further, the water inlet structure is formed in the water inlet channel towards the spraying holes in the water channel wall of the filter screen installation part.

Furthermore, the orientation of water inlet channel the water channel wall slope of filter screen installation department arranges water inlet channel's direction of height is formed with the multirow the hole sprays, and the number that the hole was sprayed in each row is a plurality of.

Further, it is close to go up to arrange the spray hole the filter screen installation department sets up in order to be able to installing filter screen on the filter screen installation department from the top down washes, and lower row of spray hole is kept away from the filter screen installation department sets up in order to be able to installing the well lower part of the filter screen on the filter screen installation department washes.

Further, the included angle between the lower side surface of the upper row of spraying holes and the horizontal plane is smaller than the included angle between the lower side surface of the lower row of spraying holes and the horizontal plane.

In addition, the water inlet channel is a U-shaped water channel, and the water inlet structures are arranged on two straight water channels of the U-shaped water channel.

In addition, a water channel groove is formed in the outer plate surface of the heat pump cover plate, and a water channel cover plate covers the water channel groove to form the water inlet channel.

In addition, the filter screen installation department includes first filter screen installation department, wherein, being located in the wind channel be formed with the backward flow water entry on the wind channel wall of first filter screen installation department one side, and being located in the wind channel be formed with the backward flow water export on the wind channel wall of first filter screen installation department opposite side, be provided with on the heat pump casing with the backward flow water entry with the return channel of backward flow water export intercommunication.

Further, the wind channel be formed with first filter screen installation department interval arrangement's second filter screen installation department, wherein, the backward flow water entry forms first filter screen installation department with between the second filter screen installation department.

Further, the air duct is located bottom wall portion between the first filter screen installation portion and the second filter screen installation portion and the backflow channel extends downwards along the continuous slope of backward flow water direction.

Further, the return passage is located outside the air duct.

Further, the duct wall of the duct includes an outwardly projecting protrusion, and the return passage is formed in the protrusion.

Further, a one-way baffle is arranged at the backflow water outlet, wherein the one-way baffle is arranged to open the backflow water outlet only under the action of backflow water flowing back through the backflow channel.

Drawings

Fig. 1 is a partial perspective view of a bottom shell of a heat pump according to an embodiment of the present invention;

FIG. 2 is a schematic top view of the structure of FIG. 1;

FIG. 3 is a schematic structural view of the bottom shell of the heat pump of FIG. 1 with a filter screen, a one-way baffle and an air suction pipe;

FIG. 4 is a bottom perspective view of FIG. 3;

FIG. 5 is a schematic view of the one-way baffle of FIG. 3 closing the return outlet;

FIG. 6 is a schematic view of the one-way flapper of FIG. 3 opening the return outlet;

FIG. 7 is a schematic partial perspective view of a heat pump housing according to an embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view of FIG. 7;

FIG. 9 is an enlarged view of a portion of the structure of FIG. 8;

FIG. 10 is a schematic diagram of a heat pump cover plate of a heat pump housing according to an embodiment of the present invention;

FIG. 11 is a schematic top view of a portion of the heat pump cover plate of FIG. 10;

fig. 12 is a schematic top view of a bottom shell of a heat pump according to an embodiment of the present invention;

FIG. 13 is a schematic cross-sectional view of a heat pump housing showing an installed evaporator and condenser in accordance with an embodiment of the present invention;

FIG. 14 is an exploded view of a heat pump housing showing a fan assembly according to an embodiment of the present invention.

Description of the reference numerals

1-an air suction opening, 2-an air duct, 3-a first filter screen mounting part, 4-a return water inlet, 5-a return water outlet, 6-a return channel, 7-a second filter screen mounting part, 8-a bottom wall part, 9-a protruding part, 10-an air duct bottom wall, 11-a one-way baffle and 12-an air suction pipe; 13-heat pump bottom shell, 14-heat pump cover plate, 15-water inlet channel, 16-water channel wall, 17-spray hole, 18-straight channel, 19-outer plate surface, 20-channel groove, 21-channel cover plate, 22-first filter screen, 23-second filter screen, 24-straight part, 25-lower sunken part, 26-fan component mounting part, 27-bottom shell inclined part, 28-cover plate inclined part, 29-air inlet channel, 30-guide plate, 31-pipe connecting section, 32-channel, 33-evaporator, 34-condenser and 35-fan component.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

Referring to the schematic diagram shown in fig. 12, the bottom shell of the heat pump provided by the present invention includes an air duct 2 having an air suction opening 1, wherein a plurality of air deflectors 30 extending along the air duct 2 are formed at a position of the air duct 2 close to the air suction opening 1, and the air duct section of the air duct 2 close to the air suction opening 1 is divided into a plurality of air inlet ducts 29 communicating with the air suction opening 1 by the plurality of air deflectors 30.

Thus, in the technical scheme, the plurality of guide plates 30 formed at the position of the air duct 2 close to the air suction opening 1 divide the air duct section at the position into the plurality of air inlet ducts 29, so that the plurality of guide plates 30 and the plurality of air inlet ducts 29 can rectify the air flow sucked into the air duct 2 from the air suction opening 1, so that the air flow is uniformly and stably distributed in the air duct 2 and uniformly passes through the evaporator 33, and the utilization rate of the evaporator 33 is greatly improved.

Of course, in the heat pump bottom case of the present invention, the plurality of air deflectors 30 may be arranged substantially parallel to the horizontal plane, that is, the plurality of air deflectors 30 are stacked at intervals in the height direction of the heat pump bottom case, thereby forming the plurality of air inlet ducts 29 at intervals in the height direction.

Alternatively, in order to further enhance the rectifying effect of the air flow, it is preferable that the plate surfaces of the plurality of baffles 30 are arranged along the height direction of the heat pump bottom shell, as shown in fig. 12. In this way, the plurality of guide plates 30 divide the air duct into a plurality of air inlet ducts 29 arranged in the width direction of the air duct 2, so that it is possible to ensure that the air flow sucked through the air suction opening 1 can pass through the respective air inlet ducts 29 at the first time.

In addition, as shown in fig. 13, a pipe connecting section 31 extending obliquely downward protrudes from the outside of the bottom shell of the heat pump at the air suction opening 1. Thus, the suction pipes 12 can be obliquely connected, so that the right-angle bending of the suction pipes 12 is avoided, and the air flow resistance and the space occupation of the suction pipes are reduced. Preferably, the air suction opening 1 is formed at the intersection of the bottom wall and the side wall of the bottom shell of the heat pump, so that the air suction opening can be maximally opened, the air volume is increased, and the air suction resistance is reduced.

In addition, as shown in fig. 13 and 14, the air duct 2 includes a straight portion 24 for installing the evaporator 33 and a lower recess portion 25 for installing the condenser 34, and the heat pump bottom case 13 includes a fan assembly mounting portion 26 connected to the lower recess portion 25 and capable of being positioned between the drum side of the washing machine and the cabinet of the washing machine, wherein, as shown in fig. 14, the lower recess portion 25 and the fan assembly mounting portion 26 and the channel 32 therebetween form a U-shaped structure to form a U-shaped air outlet end, which effectively utilizes the space of an included angle between the drum side and the cabinet to smoothly guide the air flow from the condenser area to the fan, and at the same time, the straight portion 24, the lower recess portion 25 and the fan assembly mounting portion 26 are configured such that the upper portions of the installed evaporator 33, condenser 34 and fan assembly 35 are positioned at the same horizontal plane, thereby effectively utilizing the upper space of the washing machine, the overall size of the washing machine is prevented from being too high.

In addition, the present invention provides a heat pump housing for a washing machine, wherein, as shown in fig. 7, the heat pump housing comprises a heat pump cover plate 14 and any one of the above heat pump bottom cases 13, wherein the heat pump cover plate 14 covers the heat pump bottom case 13 to form an air duct 2 therebetween. Thus, as described above, the air flow entering the air duct 2 through the air suction opening 1 can be uniformly and smoothly distributed in the air duct 2 and uniformly pass through the evaporator 33, so that the utilization rate of the evaporator 33 is greatly improved.

In addition, as described above, in order to avoid an overall height of the washing machine from being excessively high, the heat pump case of the present invention may effectively use an upper space of the washing machine to arrange the condenser, and in particular, as shown in fig. 13, a portion of the heat pump bottom case 13 is extended to be inclined downward to form a bottom case inclined portion 27, and a portion of the heat pump cover 14 is extended to be inclined downward to form a cover inclined portion 28 corresponding to the bottom case inclined portion 27, wherein a lower recess 25 for disposing the condenser is formed between the bottom case inclined portion 27 and the cover inclined portion 28, and thus, as shown in fig. 13, the condenser 34 is fixed within the lower recess 25 by being restrained by the bottom case inclined portion 27 and the cover inclined portion 28 and a side wall of the lower recess 25, thereby preventing the condenser 34 from being excessively high to reduce the overall height of the washing machine.

Further, as shown in fig. 13, since the condenser 34 is disposed in the lower recess 25, it is possible to avoid any formation of a projection on the heat pump cover plate 14, so that the heat pump cover plate 14 is a flat plate, which ensures flatness of the upper surface of the heat pump housing of the washing machine.

In addition, as shown in fig. 7 and 8, a filter mounting portion, for example, a first filter mounting portion 3 and a second filter mounting portion 7, is formed in the air duct 2, a water inlet channel 15 is formed on the heat pump cover plate 14, and a water inlet structure is arranged on the water inlet channel 15; wherein, the structure of intaking is close to the filter screen installation department sets up, makes the water of the structure spun water of intaking can be to installing filter screen on the filter screen installation department such as first filter screen 22 and second filter screen 23 as shown in fig. 3 wash.

Like this, the water course 15 switch-on running water of intaking on the heat pump apron 14, washing machine when intaking through the water inlet structure, the water inlet structure can carry out the self-cleaning to the filter screen to need not artifically dismantle the washing with the filter screen, thereby can combine together washing machine's the function of intaking and stoving function, guaranteed that the filter screen can obtain timely effectual self-cleaning, ensure the amount of wind of stoving extrinsic cycle, promoted drying efficiency, promoted convenience and the intellectuality that washing machine used.

Further, the suction pipe 12 connected between the suction opening 1 of the duct 2 shown in fig. 3 and the drum outer cylinder of the washing machine can be used as a water inlet pipe of the washing machine, so that the suction pipe 12 can play a dual role, in the drying stage, it plays a role of ventilation, and in the water injection washing stage, it plays a role of water inlet, which simplifies the internal structure of the washing machine. Meanwhile, the suction pipe 12 can also be used as a return pipe for return water for cleaning the filter screen, that is, the return water for cleaning the filter screen flows back to the suction opening 1 and then flows back into the drum outer cylinder through the suction pipe 12 to be used as washing water.

The water inlet structure may have various structures, for example, in one structure, the water inlet structure may be a nozzle disposed in the air duct 2 and connected to the water inlet passage 15, so that the filter net can be cleaned by the nozzle.

Alternatively, in another configuration, in order to simplify the structure and to make full use of the channel wall 16 of the water inlet channel 15, it is preferable that the water inlet structure is a shower hole 17 formed in the channel wall 16 of the water inlet channel 15 facing the screen mounting portion, as shown in fig. 8 and 9. Thus, under the self pressure of tap water, water in the water inlet channel 15 is sprayed out from the spraying holes 17 to spray on the filter screen so as to self-clean the filter screen, and meanwhile, the arrangement of the spraying holes 17 can avoid that other spraying parts are arranged in the air duct 2 to influence the air suction area in the air duct 2.

Further, the number and arrangement of the spray holes 17 may be selected according to actual requirements, for example, as shown in fig. 7, 9, 10 and 11, in the height direction of the inlet water channel 15, a plurality of rows of spray holes 17 are formed, and the number of each row of spray holes is plural. Thus, through the multiple rows of spraying holes and the multiple spraying holes on each row, the filter screen can be more effectively self-cleaned from top to bottom.

Further, in order to enable the rows of shower holes 17 to sufficiently clean the filter screen, it is preferable that, as shown in fig. 8 and 9, the water passage wall 16 of the water inflow passage 15 is arranged obliquely toward the filter screen on the screen mounting portion. In this way, the spray water flow sprayed from each row of spray holes 17 will directly spray on the mesh surface of the filter mesh for more effective cleaning.

In addition, in the plural rows of the spray holes, each row of the spray holes has different spray positions for cleaning the filter net more comprehensively, for example, in one configuration, as shown in fig. 8 and 12, the upper row of the spray holes is disposed close to the filter net on the filter net mounting part so as to be able to wash down the filter net mounted on the filter net mounting part from the uppermost portion, and the lower row of the spray holes is disposed far from the filter net on the filter net mounting part so as to be able to wash down the middle portion of the filter net mounted on the filter net mounting part. Therefore, the spraying positions of the multiple rows of spraying holes are different in point, and the filter screen is sprayed and cleaned more comprehensively.

Of course, this can be achieved by adjusting the size of the spray holes, or the inclination angle, for example, as shown in fig. 9, the angle between the lower side surface of the upper row of spray holes 17 and the horizontal plane is smaller than the angle between the lower side surface of the lower row of spray holes 17 and the horizontal plane. Thus, the spray water of the upper row of spray holes 17 is easier to clean from the upper part of the filter screen downwards, and the lower row of spray holes 17 is easier to clean the middle lower part of the filter screen by spraying.

In addition, the heat pump cover plate 14 may form the water inlet channel 15 in various forms, for example, in one structural form, a water inlet pipe may be fixedly disposed on an outer plate surface or an inner plate surface of the heat pump cover plate 14, and then the water inlet pipe is connected with a nozzle;

alternatively, as shown in fig. 10 and 11, the water inlet passage 15 is a U-shaped passage, and the two straight passages 18 of the U-shaped passage are provided with water inlet structures, for example, a plurality of rows of shower holes 17 are formed on the obliquely arranged passage walls 16 of the straight passages 18, so that the filter net can be more easily cleaned all over the straight passages 18. Further, as shown in fig. 8, 10 and 11, a water channel groove 20, for example, a U-shaped water channel, is formed on the outer plate surface 19 of the heat pump cover plate 14, and a water channel cover plate 21 is covered on the water channel groove 20 to form the water inlet channel 15.

Of course, as shown in fig. 11, the starting end of the water inlet channel 15 is formed with a water inlet, and the end is formed with a spray column which can extend into the corner of the confluence channel between the filter screens in the bottom shell of the heat pump, and the spray column is formed with a water outlet hole facing the corner to clean the corner, so as to prevent the flock from accumulating in the dead angle.

In addition, as shown in fig. 1 and 3, the filter screen mounting portion on the heat pump bottom case 13 includes the first filter screen mounting portion 3, so that the filter screen includes the first filter screen 22 mounted on the first filter screen mounting portion 3, wherein a return water inlet 4 is formed on the air duct wall of the air duct 2 located on one side of the first filter screen 22, a return water outlet 5 is formed on the air duct wall of the air duct 2 located on the other side of the first filter screen 22, and a return channel 6 communicating the return water inlet 4 and the return water outlet 5 is provided on the heat pump bottom case 13.

Thus, as the air duct walls of the air duct 2 located at the two sides of the first filter screen 22 are respectively formed with the return water inlet 4 and the return water outlet 5, and the return water inlet 4 and the return water outlet 5 are communicated through the return channel 6, in this way, the multiple rows of spraying holes 17 on the heat pump cover plate 14 of the washing machine water intake system 25 can wash the first filter screen 22 installed on the first filter screen installation part 3, as shown in fig. 8, at this time, the washing water on one side of the first filter screen installation part (for example, seeps into one side of the first filter screen when washing the first filter screen, and/or washes the second filter screen) can flow back through the return water inlet 4, the return channel 6 and the return water outlet 5, for example, flow back to the air suction opening 1, then enters into the drum through the air suction pipe 12, and the washing water on the other side of the first filter screen installation part, and then enters the drum through the suction duct 12, thereby preventing the washing water from being accumulated at one side of the first screen mounting part 3.

It should be noted that the first filter mounting portion 3 is not limited to the one shown in fig. 1, and it should be understood that the first filter mounting portion 3 may be a plurality of first filters arranged at intervals along the air duct 2, so that a plurality of first filters, for example, two first filter mounting portions 3, may be arranged, so that two first filters may be mounted, so that the return water on one side of each first filter, for example, between two first filters, may flow to the return channel 6 through the respective return water inlet 4.

Further, as shown in fig. 1, 2 and 3, the air duct 2 is formed with a second filter mounting part 7 arranged at a distance from the first filter mounting part 3, so that the filter includes a second filter 23 arranged at a distance from the first filter 22, wherein the return water inlet 4 is located between the first filter 22 of the first filter mounting part 3 and the second filter 23 of the second filter mounting part 7. In this way, the water washed by the second filter 23 disposed on the second filter mounting portion 7 may flow back through the return water inlet 4 and the return passage 6, and at this time, the second filter mounting portion 7 may be one, so that the second filter 23 is located at the downstream side of one first filter 22 (as shown in fig. 3) or a plurality of first filters 22 arranged at intervals in the air suction direction. Thus, the water inlet system of the washing machine can simultaneously clean the multiple layers of filter screens while water is supplied, or can specifically simultaneously clean the multiple layers of filter screens, and wash water on the downstream side can flow to the return channel 6 through the return inlet 4 to be returned.

Further, in order to facilitate the quick return of the washing water on the side of the first filter 22, it is preferable that the bottom wall 8 of the air duct 2 between the first filter mounting portion 3 and the second filter mounting portion 7 is formed as a U-shaped water collection tank as shown in fig. 1. Thus, by the collecting action of the U-shaped water collection sump, the flushing water for flushing the second filter and/or the flushing water that has permeated from the first filter when flushing the first filter will be collected by the U-shaped water collection sump and subsequently flow into the return channel 6 through the return water inlet 4.

Further, in order to more facilitate the backflow of the washing water, it is preferable that the bottom wall portion 8 of the air duct 2 between the first filter 22 and the second filter 23 and the backflow passage 6 continuously extend obliquely downward in the direction of the backflow water. In this way, due to the continuously inclined arrangement, the flushing water in the bottom wall portion 8, such as a U-shaped water collection sump, will quickly pass back down through the return channel 6 and then be discharged from the return water outlet 5.

In addition, in order not to occupy the inner space of the bottom case of the heat pump, it is preferable that the return channel 6 is located outside the air duct 2 as shown in fig. 1. Thus, the backflow channel 6 is positioned outside the air duct 2, thereby not occupying any internal space of the air duct 2, not affecting the heat exchange area of the heat exchange unit of the drying system of the washing machine, and not affecting the ventilation area of the filter screen.

Of course, in the heat pump bottom case of the present invention, the return channel 6 may be formed by a pipe located outside the heat pump bottom case, for example, one end of the pipe is connected to the return water inlet 4, and the other end is connected to the return water outlet 5;

alternatively, in order to improve the structural stability, as shown in fig. 1 and 4, the duct side wall of the duct 2 includes an outwardly protruding protrusion 9, and the return passage 6 is formed in the protrusion 9. Thus, the extension part 9 is a part of the air duct side wall of the air duct 2, so that the heat pump bottom shell and the backflow channel 6 can be integrally formed by injection molding, and the backflow channel 6 is prevented from being formed by an external pipeline.

In addition, the return passage 6 may also be formed directly inside the duct side wall of the duct 2, that is, the duct side wall of the duct 2 does not protrude outward, but the return passage 6 is formed inside.

Of course, the return channel 6 can have various structures, such as a U-shaped channel, so as to facilitate the return of the return water in time.

In addition, in order to facilitate backflow and water inlet of the washing machine, as shown in fig. 2, the air suction opening 1 is formed in the air duct bottom wall 10 of the air duct 2 on the other side of the first filter screen mounting portion 3, and the backflow water outlet 5 is communicated with the air suction opening 1. Thus, the return water passing through the return water outlet 5 flows into the bottom wall 10 of the air duct and into the drum of the washing machine through the air suction opening 1, and the washing water of the first filter screen at the most upstream side can directly and smoothly flow back through the air suction opening 1.

In addition, as shown in fig. 3, since the plurality of first filters 22 or the first and

second filters

22 and 23 are connected in series, the external circulation air must be filtered through the respective filters in sequence when the drying system of the washing machine is operated, and therefore, in order to improve the filtering effect, as shown in fig. 3, a one-way damper 11 is provided at the return water outlet 5, wherein the one-way damper 11 is provided to open the return water outlet 5 only by the return water returning through the return passage 6. Thus, as shown in fig. 5, when the drying system operates, the air inlet 1 starts to enter air under the action of the fan of the drying system, the one-way baffle 11 can close the backflow water outlet 5 under the action of self-weight closing and the flow direction pressure of the external circulation air to prevent the external circulation air from passing through each filter screen in sequence, and prevent part of the external circulation air from bypassing the upstream filter screen through the return channel 6; in the washing stage or the filter screen washing stage, as shown in fig. 6, the filter screens are washed while the water inlet system of the washing machine is supplying water, and the one-way baffle 11 can be opened under the flowing direction pressure of the return water to open the return water outlet 5, so as to allow the return water to be smoothly guided out and flow into the drum through the air suction inlet 1.

Therefore, when water enters the washing machine provided with the heat pump shell, the filter screen can be automatically cleaned by utilizing a water inlet system such as water inlet of a water inlet structure, so that the filter screen does not need to be manually taken out of the machine for cleaning, namely, the filter screen can be automatically cleaned when water enters every time, the filter screen can be effectively cleaned in time, meanwhile, the air quantity of drying external circulation is further ensured through the one-way baffle 11, and the drying efficiency is improved.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims

1. A heat pump bottom shell, characterized in that it comprises an air duct (2) with an air suction opening (1), wherein,

a plurality of guide plates (30) extending along the air duct (2) are formed at the position, close to the air suction opening (1), of the air duct (2), and the air duct section, close to the air suction opening (1), of the air duct (2) is divided into a plurality of air inlet ducts (29) communicated with the air suction opening (1) by the plurality of guide plates (30); wherein the air suction opening (1) is used as a washing water inlet.

2. The heat pump bottom shell according to claim 1, wherein the plate surfaces of the plurality of baffles (30) are arranged along a height direction of the heat pump bottom shell.

3. The heat pump bottom shell according to claim 1, characterized in that a pipe connection section (31) extending obliquely downward protrudes from the outside of the heat pump bottom shell at the air suction opening (1).

4. The heat pump bottom shell according to claim 1, wherein the air duct (2) includes a straight portion (24) for disposing an evaporator and a lower recess portion (25) for disposing a condenser, along with the direction of the wind flow, and the heat pump bottom shell (13) includes a fan assembly mounting portion (26) connected to the lower recess portion (25) and capable of being positioned between a drum side of the washing machine and a washing machine cabinet, wherein,

the lower concave part (25), the fan component mounting part (26) and a channel between the lower concave part and the fan component mounting part form a U-shaped air outlet end,

straight portion (24) undercut portion (25) with fan subassembly installation department (26) set up the upper portion that sets up as the evaporimeter, condenser and the fan subassembly of installation and are located same horizontal plane.

5. A heat pump housing, characterized by comprising a heat pump cover plate (14) and a heat pump bottom shell (13) according to any one of claims 1-4, wherein the heat pump cover plate (14) covers the heat pump bottom shell (13) to form the air duct (2) therebetween.

6. The heat pump housing according to claim 5, wherein a portion of the heat pump bottom shell (13) extends obliquely downward to form a bottom shell slope (27), and a portion of the heat pump cover plate (14) extends obliquely downward to form a cover slope (28) corresponding to the bottom shell slope (27), wherein a lower recess (25) for providing a condenser is formed between the bottom shell slope (27) and the cover slope (28).

7. The heat pump housing as claimed in claim 6, characterized in that the heat pump cover plate (14) is a flat plate.

8. The heat pump housing as claimed in claim 5, characterized in that a screen mounting is formed in the air duct (2); a water inlet channel (15) is formed on the heat pump cover plate (14), and a water inlet structure is arranged on the water inlet channel (15);

wherein, the structure of intaking is close to the filter screen installation department sets up, makes the structure spun hydroenergy of intaking can be right install filter screen on the filter screen installation department washs.

9. The heat pump housing as claimed in claim 8, characterized in that the water inlet structure is a spray hole (17) formed in a water channel wall (16) of the water inlet channel (15) facing the screen mounting.

10. The heat pump housing as claimed in claim 9, characterized in that the water channel wall (16) of the water inlet channel (15) facing the screen mounting is arranged obliquely, and in the height direction of the water inlet channel (15), a plurality of rows of the spray holes (17) are formed, the number of the spray holes in each row being plural.

11. The heat pump housing of claim 10, wherein an upper row of spray holes is disposed proximate to the screen mounting portion to enable flushing of a filter screen mounted on the screen mounting portion from an uppermost portion down, and a lower row of spray holes is disposed distal from the screen mounting portion to enable flushing of a lower middle portion of a filter screen mounted on the screen mounting portion.

12. The heat pump housing of claim 11, wherein the angle between the lower surface of the upper row of spray holes and the horizontal plane is less than the angle between the lower surface of the lower row of spray holes and the horizontal plane.

13. The heat pump housing according to claim 8, wherein the water inlet channel (15) is a U-shaped channel, and the water inlet structure is provided on two straight channels (18) of the U-shaped channel.

14. The heat pump housing as claimed in any of claims 8 to 13, wherein a water channel recess (20) is formed in the outer plate surface (19) of the heat pump cover plate (14), and a water channel cover plate (21) is covered on the water channel recess (20) to form the water inlet channel (15).

15. The heat pump housing of claim 8, wherein the filter screen mounting portion comprises a first filter screen mounting portion (3), wherein the air duct (2) is provided with a backflow water inlet (4) on the air duct wall on one side of the first filter screen mounting portion (3), and the air duct (2) is provided with a backflow water outlet (5) on the air duct wall on the other side of the first filter screen mounting portion (3), and the heat pump housing is provided with a backflow passage (6) communicating the backflow water inlet (4) with the backflow water outlet (5).

16. The heat pump housing as claimed in claim 15, characterized in that the air duct (2) is formed with a second filter mounting (7) arranged at a distance from the first filter mounting (3), wherein the return water inlet (4) is formed between the first filter mounting (3) and the second filter mounting (7).

17. The heat pump housing as claimed in claim 16, characterized in that the bottom wall (8) of the air duct (2) between the first filter mount (3) and the second filter mount (7) and the return channel (6) extend continuously obliquely downwards in the direction of the return water.

18. The heat pump housing as claimed in claim 15, characterized in that the return channel (6) is located outside the air duct (2).

19. The heat pump housing as claimed in claim 18, characterized in that the air duct wall of the air duct (2) comprises an outwardly projecting protrusion (9), the return channel (6) being formed in the protrusion (9).

20. The heat pump housing according to any one of claims 15-19, characterized in that a one-way flap (11) is arranged at the return water outlet (5), wherein the one-way flap (11) is arranged to open the return water outlet (5) only under the influence of return water returning through the return channel (6).