Heat pump clothes dryer

Abstract

The utility model relates to the technical field of heat pump clothes drying, and discloses a heat pump clothes dryer which comprises a shell and a heat exchange flow path. A roller is arranged in the shell; the heat exchange flow path is arranged on one side of the roller, the heat exchange flow path is formed by communicating a plurality of heat exchange flat pipes which are arranged in parallel, the heat exchange flat pipes are sequentially arranged in the direction opposite to the roller, and shovel fins are arranged on the two opposite side walls of each heat exchange flat pipe. According to the heat exchanger, the space occupied by the heat exchange flow path can be reduced, meanwhile, the heat exchange efficiency is improved, and the energy efficiency level is improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat pump clothes drying, and in particular to a heat pump clothes dryer. Background Art

[0002] At present, clothes dryers have become one of the indispensable household appliances in users' daily lives. Clothes dryers are cleaning household appliances that use electric heating to evaporate and dry the water in washed clothes instantly. They are especially needed in winter in the north and rainy seasons in the south, when clothes are difficult to dry. Clothes dryers use electric heating to evaporate and dry the water in clothes, which results in high energy consumption of clothes dryers, causing troubles for users.

[0003] In the related art, there is a heat pump clothes dryer, which is characterized by comprising: a hot air cylinder, an evaporator and a condenser. The condenser is arranged at the return air port of the hot air cylinder, and the evaporator is arranged at the air outlet of the hot air cylinder. The condenser is used to heat the airflow returning to the hot air cylinder, so that the airflow temperature in the hot air cylinder is increased, thereby evaporating the moisture in the clothes for drying. The evaporator is used to dehumidify the high-humidity airflow flowing out of the hot air cylinder, while ensuring the normal operation of the condenser. The energy consumption of the clothes dryer is reduced by adopting a heat pump system to exchange heat with the clothes drying airflow.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] Since the heat pump system in the heat pump dryer is arranged on one side of the drum, the heat pump system occupies a large space for installation, is difficult to install, and has low heat exchange efficiency, resulting in low energy efficiency of the dryer.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The disclosed embodiment provides a heat pump clothes dryer, which reduces the space occupied by the heat exchange flow path while increasing the heat exchange efficiency and improving the energy efficiency level.

[0009] In some embodiments, a heat pump clothes dryer includes: a housing and a heat exchange flow path. A drum is provided inside the housing; the heat exchange flow path is provided on one side of the drum, and the heat exchange flow path is connected by a plurality of heat exchange flat tubes arranged in parallel with each other, the plurality of heat exchange flat tubes are arranged in sequence in a direction opposite to the drum, and shovel fins are provided on opposite side walls of each heat exchange flat tube.

[0010] Optionally, a plurality of heat exchange flow paths are provided, and the plurality of heat exchange flow paths are arranged side by side in sequence, and adjacent heat exchange flow paths are connected.

[0011] Optionally, two heat exchange flat tubes located at an end facing the drum or an end facing away from the drum in adjacent heat exchange flow paths are communicated with each other.

[0012] Optionally, in adjacent heat exchange flow paths, the heat exchange flat tubes at one end of one heat exchange flow path facing the drum are communicated with the heat exchange flat tubes at one end of another heat exchange flow path facing away from the drum.

[0013] Optionally, there is a flow gap between the shovel fins between adjacent heat exchange flat tubes in the heat exchange flow path.

[0014] Optionally, ends of the shovel fins between adjacent heat exchange flat tubes in the heat exchange flow path abut against each other.

[0015] Optionally, along the direction toward the drum, the heat exchange flat tubes at the end of the heat exchange flow path facing away from the drum shield the other heat exchange flat tubes.

[0016] Optionally, a plurality of refrigerant flow channels are provided inside each heat exchange flat tube, and a flow area of ​​each refrigerant flow channel is greater than or equal to one third of the total flow area of ​​the heat exchange flat tube.

[0017] Optionally, a plurality of heat exchange internal teeth are provided on the inner walls on two opposite sides of each refrigerant flow channel, and the plurality of heat exchange internal teeth provided on the inner walls on two opposite sides of the refrigerant flow channel are symmetrical structures.

[0018] Optionally, a plurality of heat exchange internal teeth are provided on the inner walls on two opposite sides of each refrigerant flow channel, and the plurality of heat exchange internal teeth provided on the inner walls on two opposite sides of the refrigerant flow channel are asymmetric structures with respect to each other.

[0019] The heat pump clothes dryer provided in the embodiments of the present disclosure can achieve the following technical effects:

[0020] By setting a heat exchange flow path composed of a plurality of mutually parallel heat exchange flat tubes on one side of the drum inside the shell, since the plurality of heat exchange flat tubes are arranged in the direction away from the drum, and shovel fins are set on the opposite side walls of each heat exchange flat tube, the structure of the heat exchange flow path is more compact. While the heat exchange flow path occupies a relatively small installation space, it has a relatively large heat exchange area, so as to reduce the space occupied by the heat exchange flow path, increase the heat exchange efficiency, and improve the energy efficiency level.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a structural schematic diagram of a heat pump clothes dryer provided by an embodiment of the present disclosure;

[0024] Figure 2 is a front view of a heat exchange flow path provided by an embodiment of the present disclosure;

[0025] Figure 3 is a side view schematic diagram of a heat exchange flow path provided by an embodiment of the present disclosure;

[0026] Figure 4 is a side view schematic diagram of another heat exchange flow path provided by an embodiment of the present disclosure;

[0027] Figure 5 is a schematic diagram of a connection structure of multiple heat exchange flow paths provided by an embodiment of the present disclosure;

[0028] Figure 6 is a schematic diagram of another connecting structure of multiple heat exchange flow paths provided by an embodiment of the present disclosure;

[0029] Figure 7 is a schematic diagram of the setting position of the overcurrent gap provided in an embodiment of the present disclosure;

[0030] Figure 8 It is a schematic diagram of the abutment of the shovel fins of adjacent heat exchange flat tubes provided by an embodiment of the present disclosure;

[0031] Fig. 9 is a schematic structural diagram of a heat exchange flat tube provided in an embodiment of the present disclosure;

[0032] Fig.10 It is a schematic diagram of the structure of another heat exchange flat tube provided in an embodiment of the present disclosure.

[0033] Reference numerals:

[0034] 100, shell; 110, drum; 120, air flow cavity; 200, heat exchange flow path; 201, heat exchange flat tube; 202, shovel fin; 203, flow gap; 204, refrigerant flow channel; 205, heat exchange internal teeth; 210, condenser flow path; 220, evaporator flow path. DETAILED DESCRIPTION

[0035] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0036] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0037] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0038] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0039] Unless otherwise stated, the term "plurality" means two or more.

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0041] Combination Figure 1-10As shown, in some embodiments, the heat pump clothes dryer includes: a housing 100 and a heat exchange flow path 200. A drum 110 is provided inside the housing 100; the heat exchange flow path 200 is provided on one side of the drum 110, and the heat exchange flow path 200 is composed of a plurality of heat exchange flat tubes 201 arranged in parallel with each other, and the plurality of heat exchange flat tubes 201 are arranged in sequence in a direction away from the drum 110, and shovel fins 202 are provided on opposite side walls of each heat exchange flat tube 201.

[0042] The heat pump clothes dryer provided by the embodiment of the present disclosure is provided with a heat exchange flow path 200 composed of a plurality of mutually parallel heat exchange flat tubes 201 on one side of the drum 110 inside the housing 100. Since the plurality of heat exchange flat tubes 201 are arranged in a direction away from the drum 110, and shovel fins 202 are provided on the opposite side walls of each heat exchange flat tube 201, the structure of the heat exchange flow path 200 is more compact. While the heat exchange flow path 200 occupies a relatively small installation space, it has a relatively large heat exchange area, so as to reduce the space occupied by the heat exchange flow path 200, increase the heat exchange efficiency, and improve the energy efficiency level.

[0043] Optionally, the heat exchange flow path 200 is disposed at the lower side of the drum 110, and a plurality of heat exchange flat tubes 201 constituting the heat exchange flow path 200 are arranged in sequence in the vertical direction. In this way, the heat exchange flow path 200 and the drum 110 are arranged up and down, which can reduce the lateral width of the housing 100, thereby reducing the lateral space occupied by the heat pump dryer, and facilitating the placement of the heat pump dryer.

[0044] Optionally, the outer wall of the drum 110 is provided with a plurality of air holes, and the plurality of air holes are evenly distributed on the outer wall of the drum 110. In this way, after the heat exchange airflow exchanges heat with the heat exchange flow path 200, it flows into the inside of the drum 110 from the air holes on the outer wall of the drum 110 to dry the clothes inside the drum 110, and the airflow after drying the clothes flows out from the air holes on the outer wall of the drum 110 again, and then flows through the heat exchange airflow again for heat exchange.

[0045] Optionally, the housing 100 has an airflow cavity 120 inside, the heat exchange flow path 200 is installed in the airflow cavity 120, and the air inlet and air outlet of the airflow cavity 120 are respectively arranged toward the outer walls on both sides opposite to the drum 110. In this way, after the heat exchange airflow in the airflow cavity 120 flows through the heat exchange flow path 200 for heat exchange, it flows into the drum 110 from the multiple air holes on the outer wall on one side of the drum 110 to dry the clothes in the drum 110, and then flows out again along the multiple air holes on the outer wall on the other side opposite to the drum 110 to the airflow cavity 120 for heat exchange.

[0046] Optionally, a driving mechanism is further provided inside the housing 100, and an output end of the driving mechanism is connected to a side wall of the drum 110 in the axial direction. In this way, the driving structure can drive the drum 110 to rotate, so that the clothes in the drum 110 are agitated, and heat is better exchanged with the heat exchange airflow, thereby improving the drying efficiency.

[0047] It can be understood that the driving mechanism is composed of a driving motor, a driving wheel and a driven wheel. The output shaft of the driving motor is connected to the driving wheel, the driving wheel and the driven wheel are rotatably connected through a transmission belt, and the driven wheel is connected to a side wall of the roller 110 in the axial direction. The driving motor drives the driving wheel to rotate, and then drives the driven wheel to rotate, thereby driving the roller 110 to rotate through the driven wheel.

[0048] Optionally, a take-in / take-out opening is provided on the other side wall of the drum 110 in the axial direction, and a cover plate is provided on the side wall of the housing 100 at a position corresponding to the take-in / take-out opening, and the cover plate is rotatably connected to the side wall of the housing 100. In this way, the clothes to be dried are put into the drum 110 through the take-in / take-out opening, and then the take-in / take-out opening is closed by the cover plate, and the clothes are taken out from the take-in / take-out opening after drying.

[0049] Optionally, the heat exchange flat tube 201 is a rectangular plate-shaped structure, and a plurality of scooping fins 202 are provided on opposite side walls of the heat exchange flat tube 201. In this way, the heat exchange area between the plurality of scooping fins 202 and the heat exchange flat tube 201 can be increased, so that the refrigerant flowing in the heat exchange flat tube 201 can better exchange heat with the heat exchange airflow through the scooping fins 202.

[0050] Optionally, a plurality of scooping fins 202 are provided on both the upper side wall and the lower side wall of the heat exchange flat tube 201 .

[0051] Optionally, the number of scooping fins 202 provided on the two opposite side walls of the heat exchange flat tube 201 is the same, and the multiple scooping fins 202 provided on the two opposite side walls of the heat exchange flat tube 201 are arranged along the length direction of the heat exchange flat tube 201. In this way, the overall heat exchange uniformity of the heat exchange flat tube 201 is higher, and the heat exchange effect is improved.

[0052] Optionally, the heat exchange flat tube 201 and the scoop fin 202 are an integrally formed structure. In this way, the heat transfer resistance between the scoop fin 202 and the heat exchange flat tube 201 can be reduced, and the heat conduction efficiency between the heat exchange flat tube 201 and the scoop fin 202 is higher, thereby further improving the heat exchange efficiency of the scoop fin 202 auxiliary heat exchanger and improving the refrigeration effect of the refrigeration system.

[0053] Specifically, each scooping fin 202 is an arc-shaped sheet structure, and each scooping fin 202 has a curved curvature along the direction facing away from the heat exchange flat tube 201. In this way, multiple scooping fins 202 can have a relatively large heat exchange area while occupying a relatively small space. While ensuring the heat exchange area of ​​the scooping fin 202 auxiliary heat exchanger, the volume of the scooping fin 202 auxiliary heat exchanger is reduced.

[0054] It can be understood that the curvature of each scooping fin 202 is the same, and the multiple scooping fins 202 on both sides of the heat exchange flat tube 201 are bent toward the same side.

[0055] Optionally, in the direction toward the drum 110, the heat exchange flat tube 201 at the end of the heat exchange flow path 200 facing away from the drum 110 blocks the other heat exchange flat tubes 201. In this way, the arrangement of the plurality of heat exchange flat tubes 201 constituting the heat exchange flow path 200 is more regular, and the space occupied in the horizontal direction of the heat exchange flow path 200 is reduced.

[0056] Optionally, in the vertical direction, the heat exchange flat tube 201 at the lower end of the heat exchange flow path 200 blocks the other heat exchange flat tubes 201. In this way, the multiple heat exchange flat tubes 201 constituting the heat exchange flow path 200 are located in the same vertical space, and the two ends of the multiple heat exchange flat tubes 201 in the horizontal direction are flush, thereby reducing the lateral space occupied by the heat exchange flow path 200.

[0057] Optionally, the heat exchange flow path 200 includes a condenser flow path 210. In this way, the condenser flow path 210 is composed of a plurality of heat exchange flat tubes 201 arranged in parallel with each other, and shovel wings 202 are provided on the opposite side walls of each heat exchange flat tube 201, which can increase the heat exchange capacity while reducing the occupied space of the condenser flow path 210, so that the heat exchange airflow flowing through the condenser flow path 210 is efficiently heated, thereby improving the energy efficiency of the heat pump dryer.

[0058] Combination Figure 3 or Figure 4 As shown, in some embodiments, a plurality of heat exchange paths 200 are provided, and the plurality of heat exchange paths 200 are arranged side by side in sequence, and adjacent heat exchange paths 200 are connected. In this way, by providing a plurality of heat exchange paths 200, the heat exchange efficiency of the heat pump dryer can be further increased, and the energy efficiency can be improved.

[0059] Optionally, multiple heat exchange channels 200 are arranged side by side in the horizontal direction, the upper ends of the multiple heat exchange channels 200 are all in the same horizontal line, and the lower ends of the multiple heat exchange channels 200 are also in the same horizontal line.

[0060] It can be understood that the upper end of the heat exchange flow path 200 refers to: the upper end of the multiple scooping fins 202 distributed on the upper side wall of the heat exchange flat tube 201 located at the top among the multiple heat exchange flat tubes 201 that constitute the heat exchange flow path 200; the lower end of the heat exchange flow path 200 refers to the lower end of the multiple scooping fins 202 distributed on the lower side wall of the heat exchange flat tube 201 located at the bottom among the multiple heat exchange flat tubes 201 that constitute the heat exchange flow path 200.

[0061] Combination Figure 3As shown, in a specific embodiment, the plurality of heat exchange paths 200 are all condenser paths 210. In this way, the heat exchange area of ​​the condenser path 210 can be increased, the heat exchange amount can be increased, and thus the heating effect of the heat exchange airflow can be improved.

[0062] Optionally, two heat exchange flow paths 200 are provided, and both heat exchange flow paths 200 are condenser flow paths 210 .

[0063] Combination Figure 4 As shown, in another specific embodiment, part of the heat exchange flow paths 200 among the multiple heat exchange flow paths 200 are condenser flow paths 210, and the remaining part of the heat exchange flow paths 200 are evaporator flow paths 220, and the evaporator flow paths 220 are arranged on the windward side of the condenser flow paths 210. In this way, the condenser flow paths 210 and the evaporator flow paths 220 are both connected and composed of a plurality of heat exchange flat tubes 201 arranged in parallel with each other, and shovel wings 202 are arranged on the opposite side walls of each heat exchange flat tube 201, while increasing the heat exchange amount of the condenser flow paths 210 and the evaporator flow paths 220, the height of the heat pump clothes dryer is further reduced. Moreover, while increasing the heating amount of the condenser flow path 210, the dehumidification amount of the evaporator flow path 220 can be increased, thereby improving the clothes drying effect.

[0064] Optionally, four heat exchange flow paths 200 are provided, and among the four heat exchange flow paths 200 , two heat exchange flow paths 200 are condenser flow paths 210 , and two heat exchange flow paths 200 are evaporator flow paths 220 .

[0065] Exemplarily, the heat pump clothes dryer further includes necessary components of a heat pump refrigeration system such as a compressor and a throttling element. The compressor and the throttling element are connected to the condenser flow path 210 and the evaporator flow path 220 in sequence to form a complete heat pump refrigeration system.

[0066] Combination Figure 5 As shown, in one embodiment, two heat exchange flat tubes 201 located at one end facing the drum 110 or at one end facing away from the drum 110 in adjacent heat exchange flow paths 200 are connected. In this way, the heat exchange flat tubes 201 located at the same end in adjacent heat exchange flow paths 200 are connected, and the refrigerant in the heat exchange flow path 200 located at the liquid inlet side can flow into the next heat exchange flow path 200 after a relatively short distance, thereby simplifying the connection structure between adjacent heat exchange flow paths 200.

[0067] Specifically, the heat exchange flat tubes 201 located at the lower end or the upper end of adjacent heat exchange flow paths 200 are connected through pipelines.

[0068] Optionally, when multiple heat exchange flow paths 200 are all condenser flow paths 210, the heat exchange flat tubes 201 located at the lower end or at the upper end in adjacent condenser flow paths 210 are connected by pipelines; when some of the heat exchange flow paths 200 are condenser flow paths 210 and the remaining heat exchange flow paths 200 are evaporator flow paths 220, the heat exchange flat tubes 201 located at the lower end or at the upper end in adjacent condenser flow paths 210 are connected by pipelines, and the heat exchange flat tubes 201 located at the lower end or at the upper end in adjacent evaporator flow paths 220 are connected by pipelines.

[0069] Combination Figure 6 As shown, in another embodiment, in adjacent heat exchange paths 200, the heat exchange flat tubes 201 at one end of one heat exchange path 200 facing the drum 110 are connected to the heat exchange flat tubes 201 at one end of another heat exchange path 200 facing away from the drum 110. In this way, the heat exchange flat tubes 201 at different ends of adjacent heat exchange paths 200 are connected, so that the refrigerant in the heat exchange path 200 on the liquid inlet side can flow through a relatively long distance before flowing into the next heat exchange path 200, thereby extending the flow path of the refrigerant between adjacent heat exchange paths 200 and increasing the heat exchange area.

[0070] Specifically, in adjacent heat exchange paths 200 , the heat exchange flat tubes 201 at the lower end of one heat exchange path 200 are connected to the heat exchange flat tubes 201 at the upper end of another heat exchange path 200 through a pipeline.

[0071] Optionally, when multiple heat exchange paths 200 are all condenser paths 210, in adjacent condenser paths 210, the heat exchange flat tubes 201 located at the lower end of one heat exchange path 200 are connected to the heat exchange flat tubes 201 located at the upper end of another heat exchange path 200 through a pipeline; when some of the multiple heat exchange paths 200 are condenser paths 210 and the remaining heat exchange paths 200 are evaporator paths 220, in adjacent condenser paths 210, the heat exchange flat tubes 201 located at the lower end of one heat exchange path 200 are connected to the heat exchange flat tubes 201 located at the upper end of another heat exchange path 200 through a pipeline, and in adjacent evaporator paths 220, the heat exchange flat tubes 201 located at the lower end of one heat exchange path 200 are connected to the heat exchange flat tubes 201 located at the upper end of another heat exchange path 200 through a pipeline.

[0072] Combination Figure 7As shown, in one embodiment, there is a flow gap 203 between the scoop fins 202 between adjacent heat exchange flat tubes 201 in the heat exchange flow path 200. In this way, the ends of the scoop fins 202 between adjacent heat exchange flat tubes 201 do not touch each other, and the heat exchange air flow can flow through the flow gap 203 defined by the scoop fins 202 between adjacent heat exchange flat tubes 201, thereby increasing the heat exchange area and improving the heat exchange efficiency.

[0073] Combination Figure 8 As shown, in another embodiment, the ends of the scooped fins 202 between adjacent heat exchange flat tubes 201 in the heat exchange flow path 200 abut against each other. In this way, the ends of the scooped fins 202 between adjacent heat exchange flat tubes 201 abut against each other, and the scooped fins 202 between adjacent heat exchange flat tubes 201 form a supporting structure, which can improve the connection stability between adjacent heat exchange flat tubes 201, thereby improving the overall strength of the heat exchange flow path 200.

[0074] Combination Fig. 9 or Fig.10 As shown, in some embodiments, each heat exchange flat tube 201 is provided with a plurality of refrigerant flow channels 204, and the flow area of ​​each refrigerant flow channel 204 is greater than or equal to one third of the total flow area of ​​the heat exchange flat tube 201. In this way, by providing a plurality of refrigerant flow channels 204 inside the heat exchange flat tube 201 for the circulation of refrigerant, the heat exchange effect is improved. In order to reduce the pressure drop of the refrigerant circulating in each refrigerant flow channel 204, the flow area of ​​each refrigerant flow channel 204 is set to be greater than or equal to one third of the total flow area of ​​the heat exchange flat tube 201, which can increase the flow area of ​​each refrigerant flow channel 204, reduce the pressure drop of the refrigerant during the circulation process, and improve the heat exchange effect of the heat exchange flat tube 201.

[0075] Optionally, three refrigerant flow channels 204 are provided inside the heat exchange flat tube 201, and the flow area of ​​each refrigerant flow channel 204 is equal to one third of the total flow area of ​​the heat exchange flat tube 201. In this way, the heat exchange flat tube 201 can have multiple refrigerant flow channels 204 for the circulation of refrigerant for heat exchange, and the pressure drop of the refrigerant during the circulation process can be reduced, thereby improving the heat exchange effect of the heat exchange flat tube 201.

[0076] Combination Fig. 9As shown, in one embodiment, a plurality of heat exchange inner teeth 205 are provided on the inner walls on both sides of each refrigerant flow channel 204, and the plurality of heat exchange inner teeth 205 provided on the inner walls on both sides of the refrigerant flow channel 204 are mutually symmetrical structures. In this way, since the circulation area of ​​the refrigerant flow channel 204 is relatively large, the refrigerant is very likely to form a liquid film on the inner wall of the refrigerant flow channel 204 during the circulation process, hindering the heat exchange between the refrigerant and the inner wall of the refrigerant flow channel 204. Therefore, a plurality of symmetrical heat exchange inner teeth 205 are provided on the inner walls on both sides of each refrigerant flow channel 204, forming a turbulent flow for the refrigerant flowing in the inner wall area of ​​the refrigerant flow channel 204, making the distribution of the refrigerant inside the refrigerant flow channel 204 more uniform, increasing the turbulence of the refrigerant on the inner wall of the refrigerant flow channel 204, increasing the heat exchange coefficient between the refrigerant and the inner wall of the refrigerant flow channel 204, and thus improving the heat exchange efficiency.

[0077] Optionally, the upper inner wall and the lower inner wall of each refrigerant flow channel 204 are provided with a plurality of heat exchange inner teeth 205, and the number of heat exchange inner teeth 205 provided on the upper inner wall and the lower inner wall of each refrigerant flow channel 204 is the same. In this way, since the area of ​​the upper inner wall and the lower inner wall of the refrigerant flow channel 204 is relatively large, and the upper inner wall and the lower inner wall of the refrigerant flow channel 204 directly exchange heat with the shovel fin 202, in order to prevent the refrigerant from easily forming a liquid film on the upper inner wall and the lower inner wall of the refrigerant flow channel 204 during the circulation process, thereby hindering the heat exchange between the refrigerant and the inner wall of the refrigerant flow channel 204, the same number of heat exchange inner teeth 205 are provided on the upper inner wall and the lower inner wall of each refrigerant flow channel 204 to improve the heat exchange efficiency.

[0078] Combination Fig.10 As shown, in another embodiment, a plurality of heat exchange internal teeth 205 are provided on the inner walls on both sides of each refrigerant flow channel 204, and the plurality of heat exchange internal teeth 205 provided on the inner walls on both sides of the refrigerant flow channel 204 are mutually asymmetric structures. In this way, although the flow area of ​​each refrigerant flow channel 204 is increased compared with the traditional microchannel heat exchanger, a plurality of heat exchange internal teeth 205 are provided on the upper inner wall and the lower inner wall of each refrigerant flow channel 204, forming a turbulent flow for the refrigerant flowing in the refrigerant flow channel 204. Due to the asymmetrical distribution of multiple heat exchange inner teeth 205 on the upper inner wall and the lower inner wall of each refrigerant flow channel 204, the refrigerant flowing in the refrigerant flow channel 204 is further disturbed, and the disturbance effect on the refrigerant is further increased. The disturbance effect of the refrigerant in the upper and lower areas of the refrigerant flow channel 204 is improved, and the distribution of the refrigerant in the entire cavity of the refrigerant flow channel 204 is made more uniform, further increasing the turbulence of the refrigerant on the inner wall of the refrigerant flow channel 204, thereby improving the heat exchange coefficient between the refrigerant and the inner wall of the refrigerant flow channel 204, thereby improving the heat exchange efficiency.

[0079] Optionally, the number of heat exchange internal teeth 205 on the upper inner wall of each refrigerant flow channel 204 is less than the number of heat exchange internal teeth 205 on the lower inner wall. In this way, the heat exchange internal teeth 205 on the upper inner wall and the lower inner wall of each refrigerant flow channel 204 form an asymmetric structure, and the multiple heat exchange internal teeth 205 on the upper inner wall of the refrigerant flow channel 204 cooperate with the multiple heat exchange internal teeth 205 on the lower inner wall to form disturbances on the refrigerant, further improving the disturbance effect of the refrigerant.

[0080] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A heat pump clothes dryer, characterized in that: include: A housing (100) having a roller (110) disposed therein; The heat exchange flow path (200) is arranged on one side of the drum (110), and the heat exchange flow path (200) is composed of a plurality of heat exchange flat tubes (201) arranged in parallel with each other, the plurality of heat exchange flat tubes (201) are arranged in sequence in a direction away from the drum (110), and shovel fins (202) are provided on opposite side walls of each heat exchange flat tube (201).

2. The heat pump dryer according to claim 1, characterized in that: A plurality of heat exchange flow paths (200) are provided, and the plurality of heat exchange flow paths (200) are arranged in sequence and in parallel, and adjacent heat exchange flow paths (200) are connected.

3. The heat pump dryer according to claim 2, characterized in that: Two heat exchange flat tubes (201) located at one end facing the drum (110) or one end facing away from the drum (110) in adjacent heat exchange flow paths (200) are connected.

4. The heat pump dryer according to claim 2, characterized in that: In adjacent heat exchange flow paths (200), the heat exchange flat tubes (201) located at one end of one heat exchange flow path (200) facing the drum (110) are connected to the heat exchange flat tubes (201) located at one end of another heat exchange flow path (200) facing away from the drum (110).

5. The heat pump dryer according to claim 1, characterized in that: There is a flow gap (203) between the shovel fins (202) between adjacent heat exchange flat tubes (201) in the heat exchange flow path (200).

6. The heat pump clothes dryer according to claim 1, characterized in that: The ends of the shovel fins (202) between adjacent heat exchange flat tubes (201) in the heat exchange flow path (200) abut against each other.

7. The heat pump dryer according to claim 1, characterized in that: In the direction toward the drum (110), the heat exchange flat tubes (201) located at the end of the heat exchange flow path (200) facing away from the drum (110) shield the other heat exchange flat tubes (201).

8. The heat pump clothes dryer according to any one of claims 1 to 7, characterized in that: A plurality of refrigerant flow channels (204) are provided inside each heat exchange flat tube (201), and the flow area of ​​each refrigerant flow channel (204) is greater than or equal to one third of the total flow area of ​​the heat exchange flat tube (201).

9. The heat pump clothes dryer according to claim 8, characterized in that: A plurality of heat exchange internal teeth (205) are arranged on the inner walls on the two opposite sides of each refrigerant flow channel (204), and the plurality of heat exchange internal teeth (205) arranged on the inner walls on the two opposite sides of the refrigerant flow channel (204) are symmetrical structures.

10. The heat pump clothes dryer according to claim 8, characterized in that: A plurality of heat exchange internal teeth (205) are arranged on the inner walls on the two opposite sides of each refrigerant flow channel (204), and the plurality of heat exchange internal teeth (205) arranged on the inner walls on the two opposite sides of the refrigerant flow channel (204) are mutually asymmetric structures.

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