A heat pump clothes dryer

Abstract

The application discloses a heat pump clothes dryer, one end of an air duct is communicated with an air inlet of a drying drum, the other end is communicated with an air outlet of the drying drum, an evaporator and a condenser are arranged in the air duct, a cover plate is arranged above the evaporator and the condenser, the cover plate forms part of a side wall of the air duct, a water storage cavity is formed in the cover plate, a plurality of water permeable holes are arranged on a side of the cover plate facing the evaporator and the condenser, water in the water storage cavity is evenly sprayed on the evaporator and the condenser through the water permeable holes, the evaporator and the condenser are cleaned, heat exchange efficiency of the evaporator and the condenser is ensured, and drying effect is improved.

Description

Technical Field

[0001] This invention relates to the field of clothes dryer technology, and more particularly to a heat pump clothes dryer. Background Technology

[0002] Reference Figure 1 The existing heat pump dryer includes a drying drum 100, whose air inlet is connected to an air inlet duct 210, and whose air outlet is connected to an air outlet duct 220. A condenser 320 is located within the air inlet duct 210, and an evaporator 310 is located within the air outlet duct 220. The air inlet duct 210 and the air outlet duct 220 are closed and interconnected pipes, allowing the evaporator 310 to recover heat from the humid air exhausted from the drying drum 100, thus improving energy efficiency. Simultaneously, it can also dry the humid air.

[0003] During operation, the air inside the dryer drum 100 circulates through the evaporator 310, condenser 320, and dryer drum 100. The air is cooled at the evaporator 310 end, precipitating moisture and becoming dry and cold air. The dry and cold air flows through the condenser 320 end and is heated, becoming dry and hot air. The dry and hot air enters the dryer drum 100, carrying away the moisture from the clothes and becoming humid and hot air. The humid and hot air then flows through the evaporator, is cooled, and precipitates moisture, forming a circulating air path, and the heat is reused.

[0004] After prolonged use, lint and stains will accumulate on the evaporator 310 and condenser 320 of the dryer, leading to decreased efficiency and even bacterial growth. When the dryer is working, the circulating air passing through the evaporator 310 and condenser 320 will carry some fine stains into the dryer drum 100, contaminating the clothes.

[0005] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0006] In response to the problems pointed out in the background art, the present invention proposes a heat pump dryer that realizes automatic cleaning of the evaporator and condenser in the heat pump system, keeps the evaporator and condenser clean, ensures the efficiency of the evaporator and condenser, and improves the drying effect.

[0007] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0008] This invention provides a heat pump clothes dryer, comprising:

[0009] Clothes dryer;

[0010] The air duct is connected at one end to the air inlet of the clothes dryer and at the other end to the air outlet of the clothes dryer. An evaporator and a condenser are installed inside the air duct.

[0011] A cover plate is disposed above the evaporator and the condenser. The cover plate forms part of the sidewall of the air duct. A water storage cavity is formed inside the cover plate. The side of the cover plate facing the evaporator and the condenser is provided with multiple water permeable holes so as to evenly spray the water in the water storage cavity onto the evaporator and the condenser.

[0012] In some embodiments of this application, a water inlet is provided on one side of the water storage cavity, and a serpentine guide plate is provided inside the water storage cavity. The guide plate guides the water in the water storage cavity to flow in a serpentine path from the position of the water inlet in the water storage cavity.

[0013] In some embodiments of this application, the water storage chamber is connected to an external water source through a water inlet pipe, and a pressure boosting valve is provided on the water inlet pipe.

[0014] In some embodiments of this application, the cover plate includes an upper cover plate and a lower cover plate, the upper cover plate and the lower cover plate are connected to form the water storage cavity, and the lower cover plate is provided with the water permeable hole.

[0015] In some embodiments of this application, the air duct includes a first air duct and a second air duct that are connected.

[0016] The first air duct is connected to the air inlet of the clothes dryer, and the side wall of the first air duct includes the air duct back plate;

[0017] The second air duct is equipped with the evaporator and the condenser, and the side wall surrounding the second air duct includes the air duct base and the cover plate;

[0018] The cover plate is fixedly disposed on the top of the air duct base, and one end of the cover plate and one end of the air duct base are respectively fixedly connected to the air duct back plate.

[0019] The back panel of the air duct is provided with a ventilation opening to connect the first air duct and the second air duct.

[0020] In some embodiments of this application, the air duct base is provided with a first arc surface structure near the air vent;

[0021] The cover plate has a second arc-shaped structure near the vent;

[0022] The first arc-shaped structure and the second arc-shaped structure are joined together to form a constricted structure. The small-diameter end of the constricted structure is connected to the vent, and the large-diameter end of the constricted structure extends to the condenser end.

[0023] In some embodiments of this application, the air duct base is provided with a receiving groove, the evaporator and the condenser are located in the receiving groove, and the cover plate covers the top of the receiving groove;

[0024] A connecting rib is provided at the top edge of the receiving groove, and a corresponding slot is provided on the lower cover plate, into which the connecting rib is inserted;

[0025] The top of the air duct base is provided with multiple mounting posts, and the lower cover plate is fixedly installed to the mounting posts by screws.

[0026] In some embodiments of this application, a first pre-positioning portion is provided on the top edge of the receiving groove, and a second pre-positioning portion is correspondingly provided on the lower cover plate, wherein the first pre-positioning portion and the second pre-positioning portion cooperate.

[0027] In some embodiments of this application, the top edge of the receiving groove is provided with multiple wiring notches.

[0028] In some embodiments of this application, the bottom of the receiving tank is provided with a water receiving trough, the evaporator and the condenser are located above the water receiving trough, and the water receiving trough is connected to a drain pipe and a drain pump.

[0029] Compared with the prior art, the advantages and positive effects of the present invention are:

[0030] The heat pump dryer disclosed in this application has a cover plate above the evaporator and condenser, and a water storage chamber is formed inside the cover plate. The side of the cover plate facing the evaporator and condenser has multiple water permeable holes so that the water in the water storage chamber can be evenly sprayed onto the evaporator and condenser to clean the evaporator and condenser, ensure the efficiency of the evaporator and condenser, and improve the drying effect.

[0031] The hood-type water spray cleaning structure is completely different from the existing spray cleaning structure. Water is sprayed down from the top of the evaporator and condenser in a large-area spray manner through the hood, ensuring that every area of ​​the evaporator and condenser can be effectively cleaned and guaranteeing the cleaning effect.

[0032] Meanwhile, the cover plate forms part of the side wall of the air duct. The cover plate integrates the air duct and water spray functions, making the overall structure more compact and not causing changes in the overall size of the machine, thus saving costs.

[0033] The water storage chamber is connected to an external water source through an inlet pipe. The external water source can be independent of the dryer, ensuring the cleanliness of the cleaning water and the sufficient amount of water, thereby ensuring the cleaning effect of the evaporator and condenser.

[0034] A pressure boosting valve is installed on the water inlet pipe of the water storage chamber, which can increase the pressure of the water entering the water storage chamber. The high water pressure, combined with the large area of ​​dense perforations, can effectively wash away the lint and dust attached to the evaporator and condenser, further improving the cleaning effect.

[0035] The pressure booster valve can also ensure that the water entering the water storage chamber has a certain pressure even when the external water source pressure is low, thus ensuring the effectiveness of the water spraying and rinsing.

[0036] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a structural diagram of an existing heat pump clothes dryer;

[0039] Figure 2 This is a partial structural schematic diagram of a heat pump dryer according to an embodiment;

[0040] Figure 3 for Figure 2 The diagram shows the structure as seen from the other side.

[0041] Figure 4 for Figure 2 A schematic diagram of the structure shown after being cut along plane Q;

[0042] Figure 5 for Figure 2 The diagram shown is a structural schematic with the top cover plate omitted.

[0043] Figure 6 This is a structural schematic diagram of the air duct base and air duct back plate according to an embodiment;

[0044] Figure 7 for Figure 6 Enlarged view of section A in the middle;

[0045] Figure 8 This is a schematic diagram of the cover plate according to an embodiment;

[0046] Figure 9 for Figure 8 Enlarged view of section B in the middle;

[0047] Figure 10This is a schematic diagram of the structure of the cover plate according to an embodiment, viewed from the bottom upwards.

[0048] Figure label:

[0049] 100-dryer;

[0050] 210 - Air inlet duct, 220 - Air outlet duct, 230 - First air duct, 240 - Second air duct;

[0051] 310 - Evaporator, 320 - Condenser;

[0052] 400-Cover plate, 410-Water storage chamber, 411-Guide plate, 420-Water permeable hole, 430-Upper cover plate, 440-Lower cover plate, 441-Slot, 442-Second prepositioning part, 443-Lug, 450-Water inlet, 460-Water inlet pipe, 470-Pressure booster valve, 480-Second arc surface structure;

[0053] 500-Air duct base, 510-Accommodation slot, 520-Water receiving slot, 530-First arc surface structure, 540-First pre-positioning part, 550-Connecting stiffener, 560-Mounting column, 570-Wiring notch;

[0054] 600 - Air duct back panel, 610 - Ventilation opening. Detailed Implementation

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0058] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] In this invention, unless otherwise expressly specified and limited, the first feature "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them.

[0060] Furthermore, "above," "over," and "on top" of the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" of the first feature and the second feature include the first feature being directly below or diagonally below the second feature, or simply indicating that the first feature is at a lower horizontal level than the second feature.

[0061] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention.

[0062] Furthermore, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0063] Furthermore, the present invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0064] This embodiment discloses a heat pump dryer, including components such as a drying drum 100, an air duct, an evaporator 310, a condenser 320, and a cover plate 400.

[0065] One end of the air duct is connected to the air inlet of the dryer 100, and the other end is connected to the air outlet of the dryer 100. An evaporator 310 and a condenser 320 are installed inside the air duct.

[0066] Specific combination Figure 1The air inlet of the dryer 100 is connected to the air inlet duct 210, and the air outlet of the dryer 100 is connected to the air outlet duct 220. The condenser 320 is located in the air inlet duct 210, and the evaporator 310 is located in the air outlet duct 220.

[0067] The air inlet duct 210 and the air outlet duct 220 are sealed and interconnected pipes, which allows the evaporator 310 to recover heat from the hot and humid air discharged from the dryer drum 100, thereby improving energy utilization. At the same time, it can also dry the hot and humid air.

[0068] During operation, the air inside the dryer drum 100 circulates through the evaporator 310, condenser 320, and dryer drum 100. The air is cooled at the evaporator 310 end, precipitating moisture and becoming dry and cold air. The dry and cold air flows through the condenser 320 end and is heated, becoming dry and hot air. The dry and hot air enters the dryer drum 100, carrying away the moisture from the clothes and becoming humid and hot air. The humid and hot air then flows through the evaporator 310, is cooled, and precipitates moisture, forming a circulating air path, and the heat is reused.

[0069] After prolonged use, lint and stains will accumulate on the evaporator 310 and condenser 320 of the dryer, causing a decrease in the efficiency of the evaporator 310 and condenser 320, and even the growth of bacteria.

[0070] When the dryer is working, the circulating air passing through the evaporator 310 and condenser 320 will carry some small stains into the dryer drum, which will contaminate the clothes.

[0071] One of the purposes of this application is to achieve the cleanliness of the evaporator 310 and the condenser 320, so as to maintain the cleanliness of the evaporator 310 and the condenser 320, ensure the efficiency of the evaporator 310 and the condenser 320, and improve the drying effect.

[0072] The specific implementation method is as follows: (Refer to...) Figures 1 to 5 A cover plate 400 is provided above the evaporator 310 and the condenser 320. A water storage chamber 410 is formed inside the cover plate 400. Multiple water permeable holes 420 are provided on the side of the cover plate 400 facing the evaporator 310 and the condenser 320 so as to evenly spray the water in the water storage chamber 410 onto the evaporator 310 and the condenser 320, thereby cleaning the evaporator 310 and the condenser 320.

[0073] The 400-type water spray cleaning structure is completely different from the existing spray cleaning structure. Water is sprayed down from the top of the evaporator 310 and condenser 320 in a large-area spray manner through the 400 cover, ensuring that every area of ​​the evaporator 310 and condenser 320 can be effectively cleaned, thus guaranteeing the cleaning effect.

[0074] Meanwhile, the cover plate 400 forms part of the side wall of the air duct. The cover plate 400 integrates the air duct and water spraying functions, making the overall structure more compact and not causing changes in the overall size of the machine, thus saving costs.

[0075] Regarding the source of cleaning water, some existing technologies use condensate to clean the evaporator 310 and condenser 320, which has two drawbacks:

[0076] On the one hand, the poor cleanliness of the condensate reduces the cleaning effect of the evaporator 310 and the condenser 320;

[0077] On the other hand, the limited amount of condensate restricts the cleaning time, thus affecting the cleaning effect.

[0078] In this case, referring to Figure 2 The water storage chamber 410 is connected to an external water source through the water inlet pipe 460. The external water source can be an independent water source from the dryer, ensuring the cleanliness of the cleaning water and the sufficient amount of water, thereby ensuring the cleaning effect of the evaporator 310 and the condenser 320.

[0079] Furthermore, a pressure boosting valve 470 is provided on the water inlet pipe 460, which can increase the pressure of the water entering the water storage chamber 410. The high water pressure combined with the large area of ​​dense water permeable holes 420 can effectively wash away the lint and dust attached to the evaporator 310 and condenser 320, further improving the cleaning effect.

[0080] The pressure booster valve 470 can also ensure that the water entering the water storage chamber 410 has a certain pressure even when the external water source pressure is low, thus ensuring the effect of water spraying and rinsing.

[0081] In some embodiments of this application, the dryer has a self-cleaning button, and a water inlet valve is provided on the water inlet pipe 460. The button inputs a signal to the main control board, and the main control board controls the opening and closing of the water inlet valve through a relay. This is safe and effective, and can avoid the problem of continuous water intake caused by the failure of the dryer's display board.

[0082] In some embodiments of this application, a water inlet 450 is provided on one side of the water storage cavity 410, and a water inlet pipe 460 is connected to the water inlet 450.

[0083] Figure 8 The top layer of the cover plate 400 is transparent, and the water storage cavity 410 is provided with a serpentine guide plate 411. The guide plate 411 guides the water in the water storage cavity 410 to flow in a serpentine path from the water inlet 450.

[0084] The serpentine baffle 411 ensures that water flows through every area in the water storage chamber 410, thereby ensuring that water drips down to every part of the top of the evaporator 310 and the condenser 320, thus ensuring that the evaporator 310 and the condenser 320 are rinsed evenly and effectively.

[0085] Of course, in other embodiments, the guide plate 411 can also be designed in other structural forms, all with the aim of ensuring that water can flow through every part of the water storage cavity 410.

[0086] For example, the guide plate 411 can form a spoke-shaped structure starting from the inlet 450.

[0087] In some embodiments of this application, reference is made to Figure 8 and Figure 10 The cover plate 400 includes an upper cover plate 430 and a lower cover plate 440, both of which are plastic structures.

[0088] The upper cover plate 430 and the lower cover plate 440 are connected by fusion or adhesive technology to form a water storage cavity 410.

[0089] The upper cover plate 430 is provided with a water inlet 450, and the lower cover plate 440 is provided with a water permeable hole 420.

[0090] In some embodiments of this application, the air duct includes a first air duct 230 and a second air duct 240 that are connected, combined with Figure 1 The first air duct 230 is the air inlet duct 210. The second air duct 240 is located at the bottom of the dryer drum 100, connecting the air inlet duct 210 on the back side of the dryer drum 100 and the air outlet duct 220 on the front side. The evaporator 310 and the condenser 320 are located in the second air duct 240.

[0091] Reference Figure 3 The sidewalls forming the first air duct 230 include an air duct back plate 600, and the sidewalls forming the second air duct 240 include an air duct base 500 and a cover plate 400.

[0092] The cover plate 400 is fixedly installed on the top of the air duct base 500, and one end of the cover plate 400 and one end of the air duct base 500 are respectively fixedly connected to the air duct back plate 600.

[0093] The air duct back plate 600 is provided with a ventilation opening 610 to connect the first air duct 230 and the second air duct 240.

[0094] The gas in the second air duct 240 becomes dry and hot air after passing through the evaporator 310 and condenser 320. The dry and hot air flows into the first air duct 230 through the vent 610 and then enters the dryer drum 100.

[0095] Reference Figure 5 and Figure 6The duct base 500 is provided with a receiving groove 510, the top of the receiving groove 510 is open, the cover plate 400 covers the top of the receiving groove 510, and the evaporator 310 and the condenser 320 are located inside the receiving groove 510.

[0096] In other words, the duct base 500 constitutes most of the side wall structure of the second duct 240, while the cover plate 400 only constitutes the top side wall of the second duct 240. The overall structure of the cover plate 400 is flat, which is easy to process and manufacture, has low cost, and is easy to install with the duct base 500. At the same time, the large size of the duct base 500 also helps to improve the stability of the entire duct structure.

[0097] Reference Figure 4 The bottom of the receiving tank 510 is provided with a water receiving tank 520. The evaporator 310 and the condenser 320 are located above the water receiving tank 520. The water receiving tank 520 is connected to the drain pipe and the drain pump.

[0098] Water flowing from the cover plate 400 through the evaporator 310 and condenser 320 falls into the water receiving tank 520 and is then discharged through the drain pipe by the drain pump.

[0099] For the specific installation structure of the cover plate 400 and the air duct base 500, in some embodiments of this application, refer to... Figure 6 and Figure 10 The top edge of the receiving groove 510 is provided with a vertically extending connecting rib 550, and the outer edge of the lower cover plate 440 is provided with a corresponding slot 441, in which the connecting rib 550 is inserted.

[0100] The assembly between the connecting stiffener 550 and the slot 441 not only serves as a positioning tool but also helps improve the sealing performance of the air duct.

[0101] The top of the duct base 500 is provided with multiple mounting posts 560, and the lower cover plate 440 is provided with corresponding lugs 443. The lugs 443 are fixedly installed on the mounting posts 560 by screws, thereby improving the connection reliability between the duct base 500 and the cover plate 400.

[0102] Furthermore, refer to Figure 7 and Figure 9 The top edge of the receiving groove 510 is provided with a first pre-positioning part 540, and the lower cover plate 440 is provided with a corresponding second pre-positioning part 442. The first pre-positioning part 540 and the second pre-positioning part 442 cooperate to pre-position the cover plate 400 for installation, which facilitates assembly.

[0103] In this case, the first prepositioning part 540 is a recessed structure located near the vent 610, and the second prepositioning part 442 is an insert structure. The insert structure is embedded in the recessed structure to achieve prepositioning.

[0104] When installing the cover plate 400, first connect the first prepositioning part 540 and the second prepositioning part 442 from one end, then gradually flatten the cover plate 400 so that the slot 441 and the connecting rib plate 550 are inserted into each other, and finally screw in the screws to complete the fixed installation of the cover plate 400 on the air duct base 500.

[0105] Furthermore, refer to Figure 6 The top edge of the receiving tank 510 is provided with multiple wiring notches 570 for wiring of the internal evaporator 310 and condenser 320.

[0106] In this case, the connection between the cover plate 400 and the air duct base 500, in addition to considering the vertical connection to form an air duct structure, also needs to consider the connection with the air duct back plate 600 to ensure that the second air duct 240 and the first air duct 230 have a good air guiding effect at the connection position and do not affect the entire gas circulation.

[0107] In one specific embodiment, reference is made to Figure 4 and Figure 6 The air duct base 500 has a first arc surface structure 530 near the air vent 610;

[0108] Refer to Figure 10 The cover plate 400 has a second arc-shaped structure 480 near the vent 610;

[0109] When the cover plate 400 is connected to the air duct base 500, the first arc surface structure 530 and the second arc surface structure 480 are connected vertically to form a narrowing structure.

[0110] The small-diameter end of the constricted structure is connected to the vent 610, and the large-diameter end of the constricted structure extends to the condenser 320.

[0111] The constriction structure effectively gathers and guides the dry, hot air flowing out from the condenser 320 end, improving the efficiency of the dry, hot air flowing into the air inlet duct 210 and enhancing the return air effect.

[0112] Meanwhile, the curved structure helps reduce wind noise and wind resistance.

[0113] from Figure 4 As can be seen, the first arc surface structure 530 has an upward arc surface trend from the condenser 320 end to the vent 610 end. After the airflow is guided by the first arc surface structure 530, it flows into the air inlet duct 210 at a certain upward angle, further improving the return air effect.

[0114] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0115] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A heat pump clothes dryer, comprising: Clothes dryer; The air duct is connected at one end to the air inlet of the clothes dryer and at the other end to the air outlet of the clothes dryer. An evaporator and a condenser are installed inside the air duct. Its characteristic is that it further includes: A cover plate is disposed above the evaporator and the condenser. The cover plate forms part of the sidewall of the air duct. A water storage cavity is formed inside the cover plate. The side of the cover plate facing the evaporator and the condenser is provided with multiple water permeable holes so as to evenly spray the water in the water storage cavity onto the evaporator and the condenser. The water storage chamber has an inlet on one side and a serpentine guide plate inside the water storage chamber. The guide plate guides the water in the water storage chamber to flow in a serpentine path from the inlet.

2. The heat pump dryer according to claim 1, characterized in that, The water storage chamber is connected to an external water source through an inlet pipe, and a pressure boosting valve is installed on the inlet pipe.

3. The heat pump dryer according to claim 1 or 2, characterized in that, The cover plate includes an upper cover plate and a lower cover plate, which are connected to form the water storage cavity. The lower cover plate is provided with the water permeable hole.

4. The heat pump dryer according to claim 3, characterized in that, The air duct includes a first air duct and a second air duct that are connected. The first air duct is connected to the air inlet of the clothes dryer, and the side wall of the first air duct includes the air duct back plate; The second air duct is equipped with the evaporator and the condenser, and the side wall surrounding the second air duct includes the air duct base and the cover plate; The cover plate is fixedly disposed on the top of the air duct base, and one end of the cover plate and one end of the air duct base are respectively fixedly connected to the air duct back plate. The back panel of the air duct is provided with a ventilation opening to connect the first air duct and the second air duct.

5. The heat pump dryer according to claim 4, characterized in that, The air duct base has a first arc surface structure near the air vent; The cover plate has a second arc-shaped structure near the vent; The first arc-shaped structure and the second arc-shaped structure are joined together to form a constricted structure. The small-diameter end of the constricted structure is connected to the vent, and the large-diameter end of the constricted structure extends to the condenser end.

6. The heat pump dryer according to claim 4, characterized in that, The air duct base is provided with a receiving groove, the evaporator and the condenser are located in the receiving groove, and the cover plate covers the top of the receiving groove; A connecting rib is provided at the top edge of the receiving groove, and a corresponding slot is provided on the lower cover plate, into which the connecting rib is inserted; The top of the air duct base is provided with multiple mounting posts, and the lower cover plate is fixedly installed to the mounting posts by screws.

7. The heat pump dryer according to claim 6, characterized in that, The top edge of the receiving groove is provided with a first pre-positioning part, and the lower cover plate is provided with a corresponding second pre-positioning part, the first pre-positioning part and the second pre-positioning part cooperate.

8. The heat pump dryer according to claim 6, characterized in that, The top edge of the receiving slot has multiple wiring notches.

9. The heat pump dryer according to claim 6, characterized in that, The bottom of the receiving tank is provided with a water receiving tank, the evaporator and the condenser are located above the water receiving tank, and the water receiving tank is connected to a drain pipe and a drain pump.

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