Heat pump system and drying equipment

Abstract

The utility model provides a heat pump system and drying equipment. The heat pump system comprises a compressor, an evaporator, a condenser and a throttling element, and the evaporator is provided with a first windward side; the condenser is provided with a second windward side; the throttling element is arranged between the condenser and the evaporator; the compressor, the condenser, the evaporator and the throttling element form a refrigerant circulation channel; wherein the area of the second windward side is larger than that of the first windward side, and the ratio of the area of the second windward side to the area of the first windward side is smaller than or equal to 2. The internal structure layout of the heat pump system can be conveniently optimized, and the heat exchange efficiency of the heat pump system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a heat pump system and a drying device. BACKGROUND

[0002] In today's society, heat pump systems are widely used in various household appliances that require heat exchange functions, for example, heat pump systems are used in drying devices to achieve drying effects. In the prior art, the common heat pump system has low heat exchange efficiency, and the internal structure needs to be optimized. CONTENT OF THE INVENTION

[0003] The present application provides a heat pump system and a drying device, which can facilitate the optimization of the internal structure layout of the heat pump system and improve the heat exchange efficiency of the heat pump system.

[0004] To solve the above technical problems, the present application provides a heat pump system, which comprises a compressor, an evaporator, a condenser, a throttling device, the evaporator is provided with a first windward surface; the condenser is provided with a second windward surface; the throttling device is arranged between the condenser and the evaporator; the compressor, the condenser, the evaporator and the throttling device form a refrigerant circulation channel; wherein the area of the second windward surface is greater than the area of the first windward surface, and the ratio between the area of the second windward surface and the area of the first windward surface is less than or equal to 2.

[0005] To solve the above technical problems, the present application further provides a drying device, wherein the drying device comprises a drying chamber, an air duct shell, and the above-mentioned heat pump system; the air duct shell forms a heat exchange cavity in communication with the drying chamber; at least the evaporator and the condenser are arranged in the heat exchange cavity.

[0006] The beneficial effects of the present application are: the area of the second windward surface of the condenser of the present application is greater than the area of the first windward surface of the evaporator, and the ratio between the area of the second windward surface and the area of the first windward surface is less than or equal to 2, which facilitates increasing the heat exchange efficiency of the condenser by increasing the windward area of the condenser, thereby improving the heat exchange efficiency of the heat pump system; and increasing the heat exchange efficiency of the condenser by increasing the windward area of the condenser facilitates optimizing the size of the condenser in the wind direction, which can facilitate optimizing the internal structure layout of the heat pump system; and increasing the heat exchange efficiency of the condenser by increasing the windward area of the condenser can reduce the risk of insufficient heat exchange due to the excessive size of the condenser in the wind direction, thereby improving the overall heat exchange efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort. Among them:

[0008] Figure 1 is a structural schematic diagram of an embodiment of the drying equipment of the present application;

[0009] Figure 2 is a side view schematic diagram of the embodiment; Figure 1

[0010] Figure 3 is a sectional structural schematic diagram of the embodiment; Figure 2

[0011] Figure 4 is a structural schematic diagram of an embodiment of the evaporator of the present application;

[0012] Figure 5 is a structural schematic diagram of an embodiment of the condenser of the present application;

[0013] Figure 6 is a structural schematic diagram of an embodiment of the heat pump system of the present application;

[0014] Figure 7 is a side view schematic diagram of the embodiment; Figure 6

[0015] Figure 8 is a structural schematic diagram of an embodiment of the evaporator of the present application;

[0016] Figure 9 is a structural schematic diagram of an embodiment of the condenser of the present application;

[0017] Figure 10 is a structural schematic diagram of an embodiment of the evaporator and the condenser of the present application. DETAILED DESCRIPTION

[0018] In the following description, for the purpose of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0019] ​​​The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. It should be understood that when used in the specification and the appended claims, the term "include" indicates the presence of described features, integers, steps, operations, elements, and / or components, but does not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should also be understood that the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in the specification and the appended claims of this application, the singular forms "a", "an" and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should be further understood that the term "and / or" used in the specification and the appended claims of this application means any combination of one or more of the associated listed items and all possible combinations thereof, and includes these combinations.

[0020] As used in the specification and the appended claims of this application, the term "if" can be interpreted as "when" or "upon" or "in response to a determination" or "in response to detecting" depending on the context. Similarly, the phrase "if determined" or "if detected [the described condition or event]" can be interpreted to mean "upon determining" or "in response to determining" or "upon detecting [the described condition or event]" or "in response to detecting [the described condition or event]" depending on the context.

[0021] It should be noted that when an element is fixed to another element, it includes fixing the element directly to the other element, or fixing the element to the other element through at least one other element in the middle. When one element is connected to another element, it includes connecting the element directly to the other element, or connecting the element to the other element through at least one other element in the middle.

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0023] The present application first proposes a heat pump system 11, as Figures 1 to 10The heat pump system 11 shown. The heat pump system 11 includes a compressor, an evaporator 100, a condenser 400, a throttling device, the evaporator 100 is provided with a first windward surface; the condenser 400 is provided with a second windward surface; the throttling device is arranged between the condenser 400 and the evaporator 100; the compressor, the condenser 400, the evaporator 100 and the throttling device form a refrigerant circulation channel; wherein the area of the second windward surface is greater than the area of the first windward surface, and the ratio between the area of the second windward surface and the area of the first windward surface is less than or equal to 2.

[0024] The heat pump system 11 of the present application can be used in the drying equipment 10, for example, the heat pump system 11 of the present application can be used to dry humid air flow and the like; the refrigerant circulating in the refrigerant circulation channel can exchange heat with the outside air flow through the refrigerant pipe, fin and the like.

[0025] It should be noted that the area of the second windward surface of the condenser 400 is greater than the area of the first windward surface of the evaporator 100, that is, when the air flow passes through the evaporator 100 or the condenser 400, the windward area of the windward surface of the condenser 400 is greater than the windward area of the windward surface of the evaporator 100, and the ratio of the windward area of the windward surface of the condenser 400 to the windward area of the windward surface of the evaporator 100 is less than or equal to 2.

[0026] The area of the second windward surface of the condenser 400 of the present application is greater than the area of the first windward surface of the evaporator 100, and the ratio between the area of the second windward surface and the area of the first windward surface is less than or equal to 2, which facilitates increasing the heat exchange efficiency of the condenser 400 by increasing the windward area of the condenser 400, thereby improving the heat exchange efficiency of the heat pump system 11; and increasing the heat exchange efficiency of the condenser 400 by increasing the windward area of the condenser 400 facilitates optimizing the size of the condenser 400 in the wind direction, which can facilitate optimizing the overall structural layout of the heat pump system 11; and increasing the heat exchange efficiency of the condenser 400 by increasing the windward area of the condenser 400 can reduce the risk of insufficient heat exchange due to the excessive size of the condenser 400 in the wind direction, and improve the overall heat exchange efficiency.

[0027] In an application scenario, as Figure 4 , Figure 5As shown, a direction from the first windward surface of the evaporator 100 to the leeward surface of the evaporator 100 is a first direction x, the first direction x is perpendicular to the second direction y and the third direction z, the evaporator 100 comprises a plurality of first fins 110 arranged at intervals along the third direction z, the condenser 400 comprises a plurality of second fins 410 arranged at intervals along the third direction z, the first fins 110 and the second fins 410 each extend along the second direction y and the first direction x to form a respective main heat exchange surface, an area of the first windward surface is equal to a product of an interval Lf between two first fins 110 farthest apart and a size Hf of the first fin 110 in the second direction y, and an area of the second windward surface is equal to a product of an interval Lf between two second fins 410 farthest apart and a size Hf of the second fin 410 in the second direction y.

[0028] In an application scenario, referring to Figure 2 , In an application scenario, referring to Figure 6 , the air flow first flows through the evaporator 100 and then flows through the condenser 400; the drying device 10 comprises a drying chamber 200 in communication with the heat exchange cavity, the drying chamber 200 is used to accommodate the objects to be dried, the evaporator 100 and the condenser 400 are arranged in the heat exchange cavity (in some embodiments, can be arranged in the same air duct); the condenser 400 and the evaporator 100 are connected in series between the outlet of the compressor and the inlet of the compressor, so as to realize the circulation of the refrigerant through the compressor, the condenser 400 and the evaporator 100; the humid air in the drying chamber 200 flows into the heat exchange cavity, when the humid air flows through the evaporator 100, the humid air condenses water droplets on the surface of the evaporator 100, exchanges heat with the evaporator 100, and is converted into dry air flow; the dry air flow flows through the condenser 400 to absorb heat and becomes high-temperature dry air flow; the high-temperature dry air flow flows into the drying chamber 200 to realize the heating and drying of the objects to be dried in the drying process; the circulation of the air flow between the heat exchange cavity and the drying chamber 200 and the circulation of the refrigerant in the heat exchange cavity can realize the drying of the objects to be dried in the drying chamber 200.

[0029] The heat pump system 11 further comprises a throttling device arranged between the condenser 400 and the evaporator 100; the compressor is a power source of the heat pump system 11, used to change the low-temperature and low-pressure refrigerant vapor from the evaporator 100 into high-temperature and high-pressure refrigerant vapor through adiabatic compression and supply the condenser 400; the condenser 400 condenses the high-temperature and high-pressure refrigerant vapor from the compressor under the condition of constant pressure, radiates heat to the heat exchange cavity, that is, exchanges heat with the airflow in the heat exchange cavity, and the refrigerant in the condenser 400 becomes high-pressure subcooled liquid; the high-pressure subcooled liquid from the condenser 400 becomes low-temperature and low-pressure refrigerant vapor after throttling by the throttling device, and enters the evaporator 100 to evaporate; the low-temperature and low-pressure refrigerant wet vapor after throttling boils in the evaporator 100 under the condition of constant pressure, absorbs the heat of the wet heat medium (for example, the humid airflow entering the heat exchange cavity) in the heat exchange cavity, becomes low-temperature and low-pressure refrigerant vapor to the compressor, and makes the water vapor in the wet heat medium in the heat exchange cavity condensed into condensed water and discharged.

[0030] In the process of normal operation of the heat pump system 11, for example, in the process of completely dehumidifying and heating the airflow, the condenser 400 needs to heat the dry airflow to become a high-temperature dry airflow, so the heat exchange amount of the condenser 400 is usually greater than that of the evaporator 100. In the prior art, the total heat exchange space of the condenser 400 is usually increased by increasing the number of refrigerant pipes in the condenser 400, so as to increase the heat exchange efficiency of the condenser 400. However, how to further optimize the overall size of the condenser 400 to further improve the heat exchange efficiency of the condenser 400 is an important problem that technicians in the field have been concerned about.

[0031] Generally, the arrangement or coiling manner of the refrigerant pipes affects the overall size of the condenser 400. However, if the number of refrigerant pipes in the first direction x is blindly increased, the overall size of the condenser 400 in the first direction x will be too large, which will lead to insufficient heat exchange and low heat exchange efficiency of the condenser 400.

[0032] The area of the second windward surface of the condenser 400 is greater than the area of the first windward surface of the evaporator 100, which facilitates increasing the heat exchange efficiency of the condenser 400 by increasing the windward area of the condenser 400, and thus facilitates further optimizing the size of the condenser 400 along the first direction x, thereby facilitating reducing the risk of insufficient heat exchange of the condenser 400 due to the size of the condenser 400 along the first direction x being too long, and improving the heat exchange efficiency of the condenser 400.

[0033] In some embodiments, the ratio is greater than or equal to 1.05.

[0034] The ratio between the area of the second windward surface and the area of the first windward surface is greater than or equal to 1.05, which can improve the heat exchange efficiency of the condenser 400, thereby being more energy-saving.

[0035] In some embodiments, the ratio can be 1.05, 1.08, 1.1, 1.13, 1.2, 1.25, 1.34, 1.4, 1.45, 1.5, 1.52, 1.6, 1.7, 1.78, 1.8, 1.9 or 2, according to the actual needs of the product.

[0036] In an application scenario, according to the simulation results, the heat pump system is used in a drying device, which can reduce the drying time by 20%, reduce the air duct resistance, realize 100m 3 / h-140m 3 / h air volume; the above improvement of the heat pump system can effectively improve the space utilization, make the product design more reasonable and more compact; and the above manner can also reduce the temperature of the heat pump system, so that the whole heat pump system works at a maximum temperature below 90°C, improving the use safety.

[0037] In other embodiments, the ratio can also be set to 1.04 or 1.038 or other values greater than 1, which are not limited.

[0038] In some embodiments, the direction from the first windward surface to the leeward surface of the evaporator 100 is a first direction x, and the projection of the evaporator 100 in the first direction x is located within the projection of the condenser 400 in the first direction x.

[0039] The first direction x is the direction of the airflow flowing through the evaporator 100, which facilitates the airflow flowing through the evaporator 100 and directly flowing into the condenser 400, simplifies the air duct structure and reduces the air resistance.

[0040] In some embodiments, the first fin 110 of the evaporator 100 is provided with a plurality of first mounting areas 130 arranged along the first direction x, and the first mounting area 130 is used to mount the first refrigerant pipe 120 of the evaporator 100; the second fin 410 of the condenser 400 is provided with a plurality of second mounting areas 430 arranged along the first direction x, and the second mounting area 430 is used to mount the second refrigerant pipe 420 of the condenser 400; wherein the outer diameter of the first refrigerant pipe 120 is smaller than the outer diameter of the second refrigerant pipe 420, and the number of the first mounting area 130 is greater than the number of the second mounting area 430.

[0041] For example, refer to Figure 8 , Figure 9In some application scenarios, the first refrigerant pipe 120 has an outer diameter of 5 mm, and the second refrigerant pipe 420 has an outer diameter of 7 mm; in some application scenarios, the number of the first mounting areas 130 is 8, and the number of the second mounting areas 430 is 3, 4, 5, or 6; in some application scenarios, each of the first mounting areas 130 is provided with three first mounting holes arranged along the second direction y, and the first mounting holes are used for mounting the first refrigerant pipe 120; in some application scenarios, each of the second mounting areas 430 is provided with four second mounting holes arranged along the second direction y, and the second mounting holes are used for mounting the second refrigerant pipe 420; in other embodiments, the specific number and size of the mounting holes and the specific number and size of the mounting areas can be adjusted according to product design requirements.

[0042] The above arrangement has the beneficial effect that the first fin 110 is provided with a plurality of first mounting areas 130 arranged along the first direction x, and the second fin 410 is provided with a plurality of second mounting areas 430 arranged along the first direction x, so that the adjustment of the size of each first mounting area 130 or second mounting area 430 along the first direction x or the number of the first mounting areas 130 or second mounting areas 430 arranged along the first direction x can be used to adjust the size of the evaporator 100 or condenser 400 along the first direction x.

[0043] Further, since the heat exchange capacity of the condenser 400 is generally required to be greater than that of the evaporator 100, the arrangement that the outer diameter of the first refrigerant pipe 120 is smaller than that of the second refrigerant pipe 420 facilitates the realization that the heat exchange capacity of the condenser 400 is greater than that of the evaporator 100; further, in order to avoid the size of the drying equipment 10 in the second direction y being too large (for example, in an application scenario, the evaporator 100 is used in the drying equipment 10, and the drying chamber 200 of the drying equipment 10 is arranged along the second direction y perpendicular to the first direction x), the size of the evaporator 100 in the second direction y is not too large, and therefore the number of the first mounting areas 130 of the evaporator 100 is greater than the number of the second mounting areas 430 of the condenser 400, which can increase the heat exchange space of the evaporator 100 by increasing the size of the evaporator 100 along the first direction x, improve the heat exchange effect of the evaporator 100, and avoid the heat exchange capacity difference between the evaporator 100 and the condenser 400 being too large.

[0044] In some embodiments, referring to Figure 3 , Figure 4 , Figure 5 , the size of the condenser 400 along the first direction x is smaller than the size of the evaporator 100 along the first direction x, and the spacing Fp between the first fins 110 of adjacent evaporators 100 is greater than the spacing Fp between the second fins 410 of adjacent condensers 400.

[0045] Specifically, the evaporator 100 includes a plurality of first fins 110 arranged at intervals along a third direction z perpendicular to the first direction x, and the condenser 400 includes a plurality of second fins 410 arranged at intervals along the third direction z perpendicular to the first direction x; the interval Fp between two adjacent first fins 110 along the third direction z is greater than the interval Fp between two adjacent second fins 410 along the third direction z; for example, the interval Fp between adjacent first fins 110 is 1.5 mm, and the interval Fp between adjacent second fins 410 is 1.2 mm. Other numerical values can also be used in other embodiments, which are not described here.

[0046] To improve the overall structural compactness of the drying apparatus 10, optimize the structural layout, and to reduce the risk of insufficient heat exchange caused by the excessive size of the condenser 400 along the first direction x, the size of the condenser 400 along the first direction x is set to be smaller than the size of the evaporator 100 along the first direction x (for example, when the evaporator 100 and the condenser 400 are arranged along the first direction x, this design can reduce the size of the drying apparatus 10 in the first direction x); since the heat exchange amount of the condenser 400 in the heat pump system 11 is generally greater than that of the evaporator 100, in order to improve the heat exchange efficiency of the condenser 400, the interval Fp between two adjacent first fins 110 can be set to be greater than the interval Fp between two adjacent second fins 410, that is, the second fins 410 of the condenser 400 are more densely distributed, so that more second fins 410 can be arranged in the third direction z of the condenser 400, thereby improving the heat exchange efficiency of the condenser 400.

[0047] In some embodiments, the area of the first windward surface can be adjusted by adjusting the size of the evaporator 100 in the third direction z; for example, the interval Fp between two adjacent first fins 110 along the third direction z and the number of first fins 110 can be adjusted to adjust the interval between the two first fins 110 farthest apart in the third direction z, thereby adjusting the area of the first windward surface; similarly, similar improvements can also be made to the second fins 410 and the condenser to adjust the area of the second windward surface.

[0048] The present application further proposes a drying apparatus 10, which is described in detail below with reference to Figures 1 to 10 The drying apparatus 10 includes a drying chamber 200, an air duct shell 13, the above-mentioned heat pump system 11, the air duct shell 13 forms a heat exchange cavity in communication with the drying chamber 200; at least the evaporator 100 and the condenser 400 are arranged in the heat exchange cavity.

[0049] It should be noted that the drying apparatus 10 of the present application can be, for example, a clothes dryer, a drying and washing integrated machine, a dryer, etc. at least having a drying function; the drying chamber 200 is used to accommodate the objects to be dried, and the drying chamber 200 of the present application can be used as a separate drying chamber 200, or as a drying and washing chamber, which is not limited in particular.

[0050] The specific implementation and working principle of the heat pump system 11 can refer to the above embodiments, which will not be described here again.

[0051] The heat exchange cavity is in communication with the drying chamber 200, and the evaporator 100 and the condenser 400 are arranged in the heat exchange cavity, so that the evaporator 100 and the condenser 400 can exchange heat with the drying chamber 200, improve the drying efficiency of the drying chamber 200, reduce the interference of the external environment on the evaporator 100 and the condenser 400, improve the working efficiency and reduce the probability of damage. The heat pump system 11 is used in the drying equipment 10, which can improve the drying efficiency of the drying equipment 10 and make the drying equipment 10 more energy-saving.

[0052] In some embodiments, the drying chamber 200 and the evaporator 100 are arranged along the second direction y.

[0053] It should be noted that the drying chamber 200 and the evaporator 100 are arranged along the second direction y, which means that the projection of the evaporator 100 along a direction perpendicular to the second direction y is completely staggered and does not overlap with the projection of the drying chamber 200 along the direction. In this application, the projection refers to the orthographic projection.

[0054] The arrangement of the drying chamber 200 and the evaporator 100 along the second direction y can optimize the layout of the two, simplify the structure design, and improve the reliability of the two. For example, when the second direction y is parallel to the direction of gravity and the evaporator 100 is arranged above the drying chamber 200, this arrangement can provide certain support for the evaporator 100 and improve the position stability of the evaporator 100.

[0055] In some embodiments, in order to further optimize the structural layout of the drying equipment 10, the evaporator 100 and the condenser 400 are arranged along the first direction x.

[0056] It should be noted that the evaporator 100 and the condenser 400 are arranged along the first direction x, which means that the evaporator 100 and the condenser 400 are arranged in a staggered manner without overlapping in the projection along a direction perpendicular to the first direction x.

[0057] The arrangement of the evaporator 100 and the condenser 400 along the first direction x facilitates the smooth entry of the airflow flowing through the evaporator 100 into the condenser 400, reduces the flow resistance of the airflow, improves the heat exchange efficiency of the heat pump system 11, optimizes the structural arrangement, reduces the size, and facilitates the positioning of the fan 12 and the optimization of the air duct structure.

[0058] In some embodiments, the second direction y and the first direction x are arranged perpendicularly. This facilitates the guiding of the airflow into the evaporator 100 and reduces the interference of the drying chamber 200 with the airflow guiding.

[0059] In an application scenario, when the second direction y is parallel to the direction of gravity, since the horizontal direction is perpendicular to the direction of gravity, when it is required to arrange the evaporator 100 and the condenser 400 in the first direction x to reduce the air resistance of the air flow flowing through the evaporator 100 into the condenser 400, the first direction x is arranged to be perpendicular to the second direction y, which can facilitate the arrangement of the evaporator 100 and the condenser 400 in the horizontal direction, and not only facilitates the optimization of the layout of the two, but also facilitates the arrangement of the condenser 400 above the drying chamber 200, which can simplify the structural design of the heat exchange cavity and the refrigerant flow channel where the two are located, save costs and improve the reliability of the work of the two.

[0060] In some embodiments, the third direction z is perpendicular to the first direction x and the second direction y.

[0061] Since the second direction y is the arrangement direction of the drying chamber 200 and the evaporator 100, the plurality of first fins 110 are arranged in the third direction z which is perpendicular to the second direction y, which facilitates the straight pipe section of the first refrigerant pipe 120 arranged on the first fin 110 to be arranged in the third direction z, that is, to be arranged along the wall of the drying chamber 200; since the straight pipe section is arranged on the first fin 110, this arrangement facilitates the reduction of the interval between the first fin 110 and the wall of the drying chamber 200, improves the structural compactness between the evaporator 100 and the drying chamber 200, and facilitates the fixation of the position of the evaporator 100; similarly, the arrangement of the plurality of second fins 410 in the third direction z which is perpendicular to the second direction y can improve the structural compactness and position stability between the condenser 400 and the drying chamber 200.

[0062] In some embodiments, the drying chamber 200 includes a drum, the axis of the drum is arranged to be perpendicular to the first direction x and the second direction y, the first direction x is the direction in which the first windward surface of the evaporator 100 points to the leeward surface of the evaporator 100, and the evaporator 100 and the condenser 400 are arranged in the first direction x; the second direction y is the arrangement direction of the evaporator 100 and the drum.

[0063] It should be noted that the axis of the drum is arranged to be perpendicular to the first direction x and the second direction y, so the axis of the drum is arranged to be parallel to the third direction z; the axis of the drum is perpendicular to the first direction x and the second direction y, that is, the axis of the drum is perpendicular to the direction in which the first windward surface of the evaporator 100 points to the leeward surface of the evaporator 100, and the axis of the drum is perpendicular to the arrangement direction of the evaporator 100 and the drum; further, the axis of the drum is perpendicular to the arrangement direction of the evaporator 100 and the drum, that is, the evaporator 100 and the drum are arranged along the radial direction of the drum.

[0064] The above arrangement has the beneficial effect that the evaporator 100 and the condenser 400 are arranged along the first direction x, which facilitates reducing the air resistance of the airflow flowing from the evaporator 100 to the condenser 400; the axis of the drum is arranged perpendicular to the first direction x and the second direction y, which facilitates arranging the evaporator 100 and the condenser 400 along the circumferential direction of the drum, facilitates reserving more installation space for the condenser 400, and can improve the compactness of the drying equipment 10.

[0065] In some embodiments, the first direction x is perpendicular to the second direction y.

[0066] Since the evaporator 100 and the condenser 400 are arranged along the first direction x, the first direction x is perpendicular to the second direction y, which can make the arrangement direction of the evaporator 100 and the condenser 400 perpendicular to the arrangement direction of the evaporator 100 and the drum. This arrangement can better set the position of the condenser 400, make full use of the space around the drum, facilitate increasing the size of the condenser 400 in the arrangement direction of the evaporator 100 and the drum (i.e., the second direction y), facilitate making the size of the condenser 400 along the second direction y greater than the size of the evaporator 100 along the second direction y, and further facilitate increasing the windward area of the condenser 400, realizing that the area of the second windward surface is greater than the area of the first windward surface, and improving the heat exchange capacity of the condenser 400.

[0067] In other embodiments, the axis of the drum can also be non-perpendicular to the first direction, or the first direction can be non-perpendicular to the second direction, which can be adjusted according to actual product use requirements, and details are not repeated here.

[0068] In some embodiments, when the axis of the drum is parallel to the horizontal plane, the evaporator 100 is located above the drum, and the perpendicular line from the axis of the drum to the condenser 400 is arranged at an acute angle or an obtuse angle with the gravity direction of the drum.

[0069] It should be noted that the present embodiment describes that when the drum is placed in a manner that the axis of the drum is parallel to the horizontal plane, the evaporator 100 is arranged directly above the drum (easily making the arrangement direction of the evaporator 100 and the drum parallel to the gravity direction), and the perpendicular line from the axis of the drum to the condenser 400 is arranged at an acute angle or an obtuse angle with the gravity direction of the drum. When it is necessary to adjust the placement of the drum, the positions of the evaporator 100 and the condenser 400 can be changed accordingly; when the axis of the drum is parallel to the horizontal plane, the evaporator 100 is located directly above the drum, i.e., the arrangement direction of the evaporator 100 and the drum is parallel to the gravity direction, i.e., the second direction y is parallel to the gravity direction; the perpendicular line from the axis of the drum to the condenser 400 is arranged at an acute angle or an obtuse angle with the gravity direction of the drum, i.e., the condenser 400 is arranged more deviated from the axis of the drum (for example, it can be arranged obliquely above the drum).

[0070] When the axis of the drum is parallel to the horizontal plane, the evaporator 100 is arranged directly above the drum, which facilitates the drum to provide certain support for the evaporator 100 or the condenser 400, and can improve the position stability of the evaporator 100 or the condenser 400; when the axis of the drum is parallel to the horizontal plane, the condenser 400 is arranged at an acute angle or an obtuse angle with the vertical line of the axis of the drum and the direction of gravity of the drum, which facilitates reserving a larger installation space for the condenser 400 (especially when the internal space of the drying equipment 10 is generally a cube or a cuboid), can increase the size of the condenser 400 in the direction of gravity as much as possible, facilitates the size of the condenser 400 being greater than the size of the evaporator 100 in the direction of gravity, and then facilitates increasing the windward area of the condenser 400, and then facilitates realizing the area of the second windward surface being greater than the area of the first windward surface, and can improve the heat exchange capacity of the condenser 400.

[0071] In other embodiments, the evaporator can also be arranged directly below the drum, and at this time, the condenser can be arranged obliquely below the drum, which is not limited according to the actual use requirements of the product.

[0072] In some embodiments, the axis of the drum is parallel to the horizontal plane, the side of the condenser 400 away from the drum and the side of the evaporator 100 away from the drum are located in the same horizontal plane, and the height difference between the side of the condenser 400 close to the drum and the center point of the drum is less than the height difference between the side of the evaporator 100 close to the drum and the center point of the drum; the first direction x is perpendicular to the second direction y.

[0073] It should be noted that, since the evaporator 100 and the condenser 400 are arranged along the first direction x, the first direction x is perpendicular to the second direction y, so that the arrangement direction of the evaporator 100 and the condenser 400 is perpendicular to the arrangement direction of the evaporator 100 and the drum.

[0074] In an application scenario, the evaporator 100 is arranged directly above the drum, the condenser 400 is arranged obliquely above the drum, and the side of the condenser 400 away from the drum and the side of the evaporator 100 away from the drum are located in the same horizontal plane, which facilitates the size of the condenser 400 along the second direction y being greater than the size of the evaporator 100, and facilitates increasing the heat exchange space of the condenser 400 as much as possible; and the side of the condenser 400 away from the drum and the side of the evaporator 100 away from the drum being located in the same horizontal plane facilitates improving the aesthetics of the overall structure; further, the height difference between the side of the condenser 400 close to the drum and the center point of the drum is less than the height difference between the side of the evaporator 100 close to the drum and the center point of the drum, which facilitates realizing the extension size of the condenser 400 in the plane perpendicular to the axis of the drum being greater than the extension size of the evaporator 100 in the plane perpendicular to the axis of the drum, and thus facilitates setting the area of the second windward surface of the condenser 400 being greater than the area of the first windward surface of the evaporator 100.

[0075] In some embodiments, the diameter of the drum is 540mm to 570mm, the distance between the evaporator 100 and the condenser 400 along the first direction x is 5mm to 35mm, and the height difference between the side of the evaporator 100 close to the drum and the side of the condenser 400 close to the drum along the second direction y is 3mm to 60mm, and the first direction x is perpendicular to the second direction y.

[0076] Specifically, the diameter of the drum can be 540mm, 542mm, 545mm, 546mm, 548mm, 550mm, 553mm, 555mm, 557mm, 560mm, 565mm, 568mm or 570mm, etc., which can be adjusted according to the use requirements of the product. Of course, other values can also be taken in other embodiments.

[0077] Specifically, the distance between the evaporator 100 and the condenser 400 along the first direction x can be 5mm, 6mm, 8mm, 10mm, 12mm, 15mm, 17mm, 18.5mm, 20mm, 25mm, 28mm, 30mm, 32mm or 35mm, etc., which can be adjusted according to the use requirements of the product. Of course, other values can also be taken in other embodiments.

[0078] In an application scenario, when the axis of the drum is parallel to the horizontal plane, the axis of the drum is perpendicular to the first direction x and the second direction y, and the evaporator 100 is located directly above the drum, that is, the arrangement direction of the evaporator 100 and the drum (i.e. the second direction y) is parallel to the direction of gravity. Since the first direction x is perpendicular to the second direction y and the axis of the drum, the first direction x is parallel to the horizontal direction. The greater the distance between the evaporator 100 and the condenser 400 along the first direction x, the more convenient it is to increase the distance between the axis of the drum and the condenser 400 in the first direction x. Since the farther away from the axis of the drum in the first direction x, the smaller the size of the drum in the direction of gravity, it is more convenient to increase the size of the condenser 400 in the direction of gravity, thereby facilitating the increase of the area of the second windward surface of the condenser 400. The smaller the distance between the evaporator 100 and the condenser 400 along the first direction x, the more convenient it is to make the projection of the condenser 400 and the projection of the drum at least partially coincide in the direction of gravity, thereby facilitating the improvement of the compactness of the drying equipment 10.

[0079] Therefore, by setting the distance between the evaporator 100 and the condenser 400 along the first direction x to be 5mm to 35mm, not only can the condenser 400 be provided with sufficient installation space to some extent, making full use of the space around the drum, and facilitating the increase of the area of the second windward surface of the condenser 400, but also the compactness of the overall structure can be improved.

[0080] Specifically, the height difference between the side of the evaporator 100 close to the drum and the side of the condenser 400 close to the drum in the second direction y can be 3 mm, 5 mm, 8 mm, 10 mm, 13 mm, 15 mm, 17 mm, 19 mm, 20 mm, 25 mm, 28 mm, 30 mm, 35 mm, 36 mm, 38 mm, 40 mm, 43 mm, 45 mm, 47 mm, 49 mm, 50 mm, 52 mm, 55 mm, 58 mm, or 60 mm, etc., which can be adjusted according to the use requirements of the product; of course, other values can also be taken in other embodiments. The height difference refers to the distance between the side of the evaporator 100 close to the drum and the side of the condenser 400 close to the drum in the second direction y.

[0081] In an application scenario, when the axis of the drum is parallel to the horizontal plane, the axis of the drum is perpendicular to the first direction x and the second direction y, the evaporator 100 is located directly above the drum, that is, the arrangement direction of the evaporator 100 and the drum (i.e., the second direction y) is parallel to the direction of gravity, and the height difference refers to the height difference between the bottom of the evaporator 100 and the bottom of the condenser 400 in the second direction y (i.e., the direction of gravity).

[0082] For example, when the diameter of the drum changes, the distance between the evaporator 100 and the condenser 400 in the first direction x and the height difference between the side of the evaporator 100 close to the drum and the side of the condenser 400 close to the drum in the second direction y can be modified correspondingly to optimize the size of the evaporator 100 or the condenser 400, thereby optimizing the heat exchange effect.

[0083] In some embodiments, the diameter of the drum is 540 mm to 570 mm, the height difference between the side of the evaporator 100 close to the drum and the center point of the drum is 270 mm to 315 mm, and the height difference between the side of the condenser 400 close to the drum and the center point of the drum is 210 mm to 267 mm; the first direction x is perpendicular to the second direction y.

[0084] Specifically, the height difference between the side of the evaporator 100 close to the drum and the center point of the drum can be 270 mm, 275 mm, 278 mm, 279 mm, 300 mm, 305 mm, 308 mm, 310 mm, 313 mm, 314 mm, or 315 mm, etc., which refers to the distance between the side of the evaporator 100 close to the drum and the center point of the drum in the second direction y, and can be adjusted according to the use requirements of the product.

[0085] In an application scenario, when the axis of the drum is parallel to the horizontal plane, the axis of the drum is perpendicular to the first direction x and the second direction y, the evaporator 100 is located directly above the drum, and the condenser 400 is located obliquely above the drum, it is easy to obtain that the second direction y is parallel to the direction of gravity, and the height difference between the side of the evaporator 100 close to the drum and the center point of the drum refers to the height difference between the bottom of the evaporator 100 and the center point of the drum in the second direction y (i.e., the direction of gravity).

[0086] Of course, other values can also be taken in other embodiments, for example, when the diameter of the drum changes, the height difference between the side of the evaporator 100 close to the drum and the center point of the drum, the height difference between the side of the condenser 400 close to the drum and the center point of the drum can be modified accordingly to optimize the size of the evaporator 100 or the condenser 400, thereby optimizing the heat exchange effect.

[0087] Specifically, the height difference between the side of the condenser 400 close to the drum and the center point of the drum can be 210 mm, 215 mm, 218 mm, 220 mm, 222 mm, 225 mm, 228 mm, 230 mm, 233 mm, 235 mm, 238 mm, 240 mm, 243 mm, 245 mm, 248 mm, 250 mm, 251 mm, 252 mm, 255 mm, 258 mm, 260 mm, 263 mm, 265 mm, or 267 mm, etc., which refers to the distance between the side of the condenser 400 close to the drum and the center point of the drum in the second direction y, and can be adjusted according to the use requirements of the product; of course, other values can also be taken in other embodiments.

[0088] In an application scenario, when the axis of the drum is parallel to the horizontal plane, the axis of the drum is perpendicular to the first direction x and the second direction y, the evaporator 100 is located directly above the drum, and the condenser 400 is located obliquely above the drum, it is easy to obtain that the second direction y is parallel to the direction of gravity, and the height difference between the side of the condenser 400 close to the drum and the center point of the drum refers to the height difference between the bottom of the condenser 400 and the center point of the drum in the second direction y (i.e., the direction of gravity).

[0089] The above arrangement facilitates to improve the compactness of the overall structure of the drying equipment 10.

[0090] In some embodiments, referring to Figure 3 The heat pump system 11 further includes a fan 12 arranged at the air inlet of the air duct shell 13 to guide the gas in the heat exchange cavity into the drying chamber 200, and the fan 12 is located on the side of the condenser 400 away from the evaporator 100, and the height difference between the bottom of the condenser 400 and the fan shaft 123 of the fan 12 is -10 mm to 30 mm.

[0091] The fan 12 is configured to facilitate the circulation of air in the heat exchange cavity and the drying chamber 200. The fan 12 is arranged on the side of the condenser 400 away from the evaporator 100, which facilitates the optimization of the structural design and enables the air inlet of the fan 12 to be in communication with the heat exchange cavity and the air outlet of the fan 12 to be in communication with the drying chamber, so that the fan 12 can guide the air from the evaporator 100 to the condenser 400 and then guide the air flowing out of the condenser 400 to the drying chamber 200.

[0092] It should be noted that the height difference between the bottom of the condenser 400 and the fan shaft 123 of the fan 12 refers to the value obtained by subtracting the height of the fan shaft 123 of the fan 12 from the height of the bottom of the condenser 400 in the arrangement direction of the evaporator 100 and the drum (i.e., the second direction y). The value can be negative, i.e., the height of the bottom of the condenser 400 can be less than the height of the fan shaft 123 of the fan 12 in the second direction y. When the value is positive, the height of the bottom of the condenser 400 can be higher than the height of the fan shaft 123 of the fan 12 in the second direction y.

[0093] For example, in an application scenario, when the axis of the drum is parallel to the horizontal plane, the axis of the drum is perpendicular to the first direction x and the second direction y, and the evaporator 100 is located directly above the drum and the condenser 400 is located obliquely above the drum, it is easy to obtain that the arrangement direction of the evaporator 100 and the drum is parallel to the direction of gravity, i.e., the second direction y is parallel to the direction of gravity, and thus the height difference between the bottom of the condenser 400 and the fan shaft 123 of the fan 12 refers to the height difference between the bottom of the condenser 400 and the fan shaft 123 of the fan 12 in the direction of gravity.

[0094] Specifically, the height difference between the bottom of the condenser 400 and the fan shaft 123 of the fan 12 can be -10 mm, -9 mm, -8 mm, -5 mm, -2 mm, 0 mm, 1 mm, 3 mm, 5 mm, 6 mm, 8 mm, 9 mm, 10 mm, 15 mm, 20 mm, 23 mm, 25 mm, 26 mm, 27 mm, 29 mm, or 30 mm, etc., which can be adjusted according to the use requirements of the product. Of course, other values can also be taken in other embodiments.

[0095] In other embodiments, the air duct structure and the position of the fan can also be adjusted as required. For example, the fan can also be arranged on the side of the evaporator away from the condenser, and the air outlet of the fan is arranged in communication with the heat exchange cavity and the air inlet of the fan is arranged in communication with the drying chamber.

[0096] In some embodiments, the heat pump system 11 further comprises a fan 12 arranged at an air outlet of the air duct housing 13 to guide the air in the heat exchange cavity to the drying chamber 200, the fan 12 is located at a side of the condenser 400 away from the evaporator 100, the height of the second fin 410 of the condenser 400 along the second direction y is 60mm to 100mm, and the impeller diameter of the fan 12 is 100mm to 170mm.

[0097] Specifically, the height of the second fin 410 of the condenser 400 along the second direction y, i.e., the extension size Hf of the second fin 410 along the second direction y, can be 60mm, 63mm, 65mm, 66mm, 68mm, 6mm, 70mm, 75mm, 77mm, 80mm, 85mm, 86mm, 90mm, 95mm, 99mm or 100mm, etc., which can be adjusted according to the use requirements of the product. Of course, other values can also be taken in other embodiments.

[0098] Specifically, the impeller diameter of the fan 12 can be 100mm, 103mm, 105mm, 108mm, 109mm, 115mm, 118mm, 120mm, 123mm, 125mm, 130mm, 135mm, 140mm, 142mm, 145mm, 148mm, 150mm, 152mm, 155mm, 160mm, 165mm or 170mm, etc., which can be adjusted according to the use requirements of the product. Of course, other values can also be taken in other embodiments.

[0099] In an application scenario, when the axis of the drum is parallel to the horizontal plane, and the axis of the drum is perpendicular to the first direction x and the second direction y, and the evaporator 100 is located directly above the drum and the condenser 400 is located obliquely above the drum, it is easy to obtain that the second direction y is parallel to the direction of gravity, and the height of the second fin 410 of the condenser 400 along the second direction y is the height of the second fin 410 of the condenser 400 along the direction of gravity.

[0100] Such an arrangement facilitates the maximization of the coincidence of the projection of the condenser 400 and the impeller of the fan 12 in the first direction x, thereby facilitating the reduction of the air resistance of the air flow from the condenser 400 to the fan 12 and the improvement of the air flow speed.

[0101] In other embodiments, the height of the second fin of the condenser along the second direction can also be adjusted according to the impeller diameter, or the impeller diameter can be adjusted according to the height of the second fin of the condenser along the second direction.

[0102] In some embodiments, as Figure 8 , Figure 9As shown, each first mounting region 130 is provided with a plurality of first mounting holes arranged at intervals along the second direction y for mounting the first refrigerant pipe 120; and each second mounting region 430 is provided with a plurality of second mounting holes arranged at intervals along the second direction y for mounting the second refrigerant pipe 420. Such arrangement facilitates adjustment of the size of the evaporator 100 or the condenser 400 along the second direction y by adjusting the pipe spacing of the first refrigerant pipe 120 or the second refrigerant pipe 420 along the second direction y and the number of mounting holes in each mounting region.

[0103] In other embodiments, the second direction can also intersect or be opposite to the direction of gravity, without limitation.

[0104] In some embodiments, the air volume of the fan 12 is 120 m 3 / h. Such arrangement facilitates sufficient air flow for air exchange between the heat exchange cavity and the drying chamber 200, thereby improving the drying efficiency of the drying device 10.

[0105] In other embodiments, the air volume of the fan can be adjusted according to the use requirements of the product.

[0106] In some embodiments, referring to Figure 8 , the first mounting holes of two adjacent first mounting regions 130 are arranged at intervals along the second direction y.

[0107] In some embodiments, referring to Figure 9 , the second mounting holes of two adjacent second mounting regions 430 are arranged at intervals along the second direction y.

[0108] It should be noted that the interval arrangement refers to the projection of the mounting holes of two adjacent mounting regions in a direction perpendicular to the second direction y, which can be completely arranged at intervals in some embodiments.

[0109] Since the mounting holes are used to arrange the refrigerant pipes, and the plurality of mounting regions are arranged along the first direction x, when the mounting holes of two adjacent mounting regions are arranged at intervals along the second direction y perpendicular to the first direction x, the shielding effect of the refrigerant pipes in the mounting region close to the windward side on the refrigerant pipes in the other mounting region away from the windward side can be reduced, thereby improving the overall heat exchange efficiency of the air flow and the condenser or evaporator.

[0110] In some embodiments, referring to Figure 2 , Figure 7 The air duct shell 13 is arranged above the drum, and one or more of the evaporator 100, the condenser 400, the compressor, and the fan 12 are connected to the air duct shell 13, and the air duct shell 13 supports one or more of the evaporator 100, the condenser 400, the compressor, and the fan 12 to improve the structural stability of the drying device 10, etc.

[0111] It should be noted that the specific connection mode of the air duct shell 13 is not limited, such as fixed connection or detachable connection.

[0112] In some embodiments, the air duct shell 13 can be provided with a mounting position outside the heat exchange cavity for mounting the compressor, the fan 12, etc.

[0113] By integrating the compressor, the fan 12, the condenser 400 and the evaporator 100 through the air duct shell 13, the structural layout can be optimized, the structural stability can be improved, and the structural volume can be reduced.

[0114] In some embodiments, the evaporator 100 is arranged close to the air inlet of the heat exchange cavity, the condenser 400 is arranged close to the air outlet of the heat exchange cavity, and the air inlet of the heat exchange cavity is communicated with the air outlet of the drying chamber 200, so that the structure of the entire drying equipment 10 can be optimized.

[0115] In some embodiments, the axis of the drum is perpendicular to the first direction x and the second direction y (i.e., the third direction z is parallel to the axis of the drum), the axis of the drum is parallel to the horizontal plane, the second direction y is parallel to the direction of gravity, the drum and the evaporator 100 are arranged along the second direction y, and the evaporator 100 is arranged directly above the drum; the evaporator 100, the condenser 400 and the fan 12 are arranged along the first direction x in sequence (i.e., arranged along the horizontal direction), i.e., the condenser 400 is arranged obliquely above the drum; along the first direction x, the area of the second windward surface of the condenser 400 is greater than the area of the first windward surface of the evaporator 100; the ratio of the area of the second windward surface to the area of the first windward surface is between 1.05 and 2; the condenser 400 comprises a plurality of second fins 410 arranged at intervals along the third direction z, and the evaporator 100 comprises a plurality of first fins 110 arranged at intervals along the third direction z.

[0116] Further, the diameter of the drum is in the range of 540mm to 570mm, the distance between the evaporator 100 and the condenser 400 along the first direction x is in the range of 5mm to 35mm, the height difference between the bottom of the evaporator 100 and the bottom of the condenser 400 along the second direction y is in the range of 3mm to 60mm, the height difference between the bottom of the evaporator 100 and the center point of the drum is in the range of 270mm to 315mm, and the height difference between the bottom of the condenser 400 and the center point of the drum is in the range of 210mm to 267mm.

[0117] Further, the condenser 400 is located on the side of the fan 12 close to the evaporator 100, the height difference between the bottom of the condenser 400 and the center of the fan shaft 123 of the fan 12 is in the range of -10mm-30mm; the height of the second fin 410 of the condenser 400 along the second direction y is in the range of 60mm-100mm, and the impeller diameter of the fan 12 is in the range of 100mm-170mm; the first fin 110 of the evaporator 100 is provided with 8 first mounting areas 130 arranged along the first direction x, each first mounting area 130 includes 3 first mounting holes arranged along the second direction y, the first mounting hole of the first mounting area 130 is used for mounting the first refrigerant pipe 120 of the evaporator 100, and the outer diameter of the first refrigerant pipe 120 is 5mm; the second fin 410 of the condenser 400 is provided with 4 second mounting areas 430 arranged along the first direction x, each second mounting area 430 includes 4 second mounting holes arranged along the second direction y, and the second mounting hole of the second mounting area 430 is used for mounting the second refrigerant pipe 420 of the condenser 400, and the outer diameter of the second refrigerant pipe 420 is 7mm; the air volume of the fan 12 is 120m 3 / h.

[0118] Further, the interval distance Fp between the adjacent two first fins 110 along the third direction z is 1.5mm, and the interval distance Fp between the adjacent two second fins 410 is 1.2mm.

[0119] The above arrangement facilitates to realize that the windward area of the condenser 400 is greater than the windward area of the evaporator 100, and the overall heat exchange efficiency of the drying equipment 10 can be improved, thereby being more energy-saving.

[0120] In some embodiments (not shown in the figure), the height difference between the bottom of the condenser and the center point of the drum along the first direction can also be reduced. This arrangement facilitates the bottom of the condenser to fit the drum wall as much as possible, i.e., the bottom of the condenser is not a flat surface, for example, it can be arranged in a stepped or arc shape, which facilitates to increase the heat exchange space of the condenser as much as possible, and facilitates to improve the heat exchange efficiency of the condenser.

[0121] Unlike the prior art, the area of the second windward surface of the condenser of the present application is greater than the area of the first windward surface of the evaporator, and the ratio between the area of the second windward surface and the area of the first windward surface is less than or equal to 2, which facilitates to increase the heat exchange efficiency of the condenser by increasing the windward area of the condenser, thereby being able to improve the heat exchange efficiency of the heat pump system; and by increasing the heat exchange efficiency of the condenser by increasing the windward area of the condenser, the size of the condenser in the wind direction can be optimized, which facilitates to optimize the overall structure layout of the heat pump system; and by increasing the heat exchange efficiency of the condenser by increasing the windward area of the condenser, the risk of insufficient heat exchange due to the excessive size of the condenser in the wind direction can be reduced, and the overall heat exchange efficiency can be improved.

[0122] It is worth noting that the drawings herein are only for showing the structural relationship and connection relationship of the product of the present application, and do not limit the specific structural size of the product of the present application.

[0123] The above is only the embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A heat pump system, characterized by, The heat pump system comprises: a compressor; an evaporator provided with a first windward surface; a condenser provided with a second windward surface; a throttling device arranged between the condenser and the evaporator; the compressor, the condenser, the evaporator and the throttling device form a refrigerant circulation channel; wherein the area of the second windward surface is greater than the area of the first windward surface, and the ratio between the area of the second windward surface and the area of the first windward surface is less than or equal to 2.

2. The heat pump system of claim 1, wherein, The ratio is greater than or equal to 1.

05.

3. The heat pump system of claim 1, wherein, The direction from the first windward surface to the leeward surface of the evaporator is a first direction, and the projection of the evaporator in the first direction is located within the projection of the condenser in the first direction.

4. The heat pump system of claim 3, wherein, The first fins of the evaporator are provided with a plurality of first mounting areas arranged in the first direction, and the first mounting areas are used to mount the first refrigerant pipes of the evaporator; the second fins of the condenser are provided with a plurality of second mounting areas arranged in the first direction, and the second mounting areas are used to mount the second refrigerant pipes of the condenser; wherein the outer diameter of the first refrigerant pipe is smaller than the outer diameter of the second refrigerant pipe, and the number of the first mounting areas is greater than the number of the second mounting areas.

5. The heat pump system of claim 3, wherein, The size of the condenser in the first direction is smaller than the size of the evaporator in the first direction, and the spacing between adjacent first fins of the evaporator is greater than the spacing between adjacent second fins of the condenser.

6. A drying apparatus, characterized by, The drying equipment comprises: a drying chamber; an air duct shell formed with a heat exchange cavity in communication with the drying chamber; The heat pump system of any one of claims 1 to 5, at least the evaporator and the condenser are arranged in the heat exchange cavity.

7. The drying apparatus according to claim 6, characterized in that The drying chamber comprises a drum, the axis of the drum is arranged perpendicular to the first direction and the second direction; the first direction is the direction from the first windward surface to the leeward surface of the evaporator, and the evaporator and the condenser are arranged in the first direction; the second direction is the arrangement direction of the evaporator and the drum.

8. The drying apparatus according to claim 7, characterized by When the axis of the drum is parallel to the horizontal plane, the evaporator is located above the drum, and the vertical line from the axis of the condenser to the drum is arranged at an acute angle or an obtuse angle with the direction of gravity of the drum.

9. The drying apparatus according to claim 7, wherein When the axis of the drum is parallel to the horizontal plane, the side of the condenser away from the drum and the side of the evaporator away from the drum are located in the same horizontal plane, and the height difference between the side of the condenser close to the drum and the center point of the drum is smaller than the height difference between the side of the evaporator close to the drum and the center point of the drum. The first direction is perpendicular to the second direction.

10. The drying apparatus according to claim 7, wherein The diameter of the drum is 540mm to 570mm, the spacing between the evaporator and the condenser in the first direction is 5mm to 35mm, and the height difference between the side of the evaporator close to the drum and the side of the condenser close to the drum in the second direction is 3mm to 60mm. The first direction is perpendicular to the second direction.

11. The drying apparatus according to claim 7, wherein The diameter of the roller is 540mm to 570mm, the height difference between the side of the evaporator close to the roller and the center point of the roller is 270mm to 315mm, and the height difference between the side of the condenser close to the roller and the center point of the roller is 210mm to 267mm. The first direction is perpendicular to the second direction.

12. The drying apparatus according to claim 9, wherein The heat pump system further comprises a fan arranged at the air outlet of the air duct housing to guide the gas in the heat exchange cavity into the drying chamber, the fan is located on the side of the condenser away from the evaporator, and the height difference between the bottom of the condenser and the fan shaft of the fan is -10mm to 30mm.

13. The drying apparatus according to claim 12, characterized in that, The heat pump system further comprises a fan arranged at the air outlet of the air duct housing to guide the gas in the heat exchange cavity into the drying chamber, the fan is located on the side of the condenser away from the evaporator, the height of the second fin of the condenser along the second direction is 60mm to 100mm, and the diameter of the impeller of the fan is 100mm to 170mm.

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