Heat exchanger, heat pump system and drying equipment

Abstract

The utility model provides a heat exchanger, a heat pump system and drying equipment, the heat exchanger is provided with a plurality of sections which are parallel and arranged in the first direction, the areas of the sections are increased in the first direction, and the sections are perpendicular to the first direction; the heat exchanger is provided with a windward side and a leeward side, and the first direction points to the leeward side from the windward side. The heat exchange efficiency of the heat exchanger can be improved on the whole.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a heat exchanger, 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, a common heat pump system includes a heat exchanger, and how to further improve the heat exchange efficiency of the heat exchanger is a problem that technicians in the field focus on. CONTENT OF THE INVENTION

[0003] The present application provides a heat exchanger, a heat pump system and a drying device, which can improve the heat exchange efficiency of the heat exchanger as a whole.

[0004] To solve the above technical problems, the present application provides a heat exchanger, which has a plurality of cross sections arranged in parallel and along a first direction, the area of the plurality of cross sections increases along the first direction, and the cross section is perpendicular to the first direction; wherein the heat exchanger is provided with a windward side and a leeward side, and the first direction points from the windward side to the leeward side.

[0005] To solve the above technical problems, the present application further provides a heat pump system, which includes a compressor, an evaporator and a condenser, the condenser includes the above-mentioned heat exchanger, and the compressor, the condenser and the evaporator form a refrigerant circulation channel.

[0006] To solve the above technical problems, the present application further provides a drying device, which includes 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.

[0007] The beneficial effects of the present application are: the airflow flows through the heat exchanger along the first direction, so the heat exchange amount of the airflow and the leeward side area of the heat exchanger is lower than the heat exchange amount of the airflow and the windward side of the heat exchanger, by setting the area of the cross section of the heat exchanger to increase along the first direction, it is beneficial to increase the contact area of the airflow and the heat exchanger along the first direction, and thus the heat exchange amount of the airflow and the leeward side of the heat exchanger can be increased, therefore the present application can improve the uniformity of the heat exchange amount of each area of the heat exchanger, and improve the heat exchange efficiency of the heat exchanger as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0009] Figure 1 is a structural schematic diagram of an embodiment of the drying apparatus of the present application;

[0010] Figure 2 is a structural schematic diagram of an embodiment of the heat pump system of the present application;

[0011] Figure 3 is a cross-sectional structural schematic diagram of the embodiment; Figure 2

[0012] Figure 4 is a structural schematic diagram of an embodiment of the heat exchanger of the present application;

[0013] Figure 5 is a structural schematic diagram of an embodiment of the evaporator and condenser of the present application;

[0014] Figure 6 is a structural schematic diagram of an embodiment of the heat exchanger of the present application;

[0015] Figure 7 is a schematic diagram of the flow mode of the refrigerant in the condenser. DETAILED DESCRIPTION

[0016] In the following description, for purposes of explanation and not limitation, specific details are set forth, such as a particular structure, 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.

[0017] The terms "first", "second", etc. in the present 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 the 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 present application specification are merely for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, 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 present application specification is intended to refer to any combination of one or more of the associated listed items and all possible combinations thereof.

[0018] ​As used in the specification and the appended claims, the term "if' can be interpreted as meaning "when," or "upon," or "in response to a determination," or "in response to a detection" depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be interpreted as meaning "upon determining," or "in response to a determining," or "upon detecting [a described condition or event]," or "in response to a detection of [a described condition or event]," depending on the context.

[0019] It should be noted that when a certain element is fixed to another element, it includes that the element is directly fixed to the other element, or the element is fixed to the other element through at least one other element in the middle. When one element is connected to another element, it includes that the element is directly connected to the other element, or the element is connected to the other element through at least one other element in the middle.

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] The present application first proposes a heat exchanger, such as Figures 1 to 6 as shown, Figure 1 is a structural schematic diagram of an embodiment of the drying equipment 10 of the present application; Figure 2 is a structural schematic diagram of an embodiment of the heat pump system of the present application; Figure 3 is Figure 2 is a cross-sectional structural schematic diagram of the embodiment; Figure 4 is a structural schematic diagram of an embodiment of the heat exchanger of the present application; Figure 5 is a structural schematic diagram of an embodiment of the evaporator and the condenser of the present application; Figure 6 is a structural schematic diagram of an embodiment of the heat exchanger of the present application. The heat exchanger 400 has a plurality of cross sections arranged in parallel and along a first direction x, the areas of the plurality of cross sections increase along the first direction x, and the cross sections are perpendicular to the first direction x; wherein the heat exchanger 400 is provided with a windward side and a leeward side, and the first direction x points from the windward side to the leeward side.

[0022] It should be noted that the cross section of the heat exchanger 400 refers to the cross section of the heat exchanger 400 in the vertical plane of the first direction x, and the cross section of the heat exchanger 400 includes a plurality of cross sections arranged in parallel and spaced apart along the first direction x; the area of at least part of the cross section of the heat exchanger 400 increases along the first direction x, for example, the areas of the plurality of cross sections can gradually increase along the first direction x, or can increase in steps, etc.

[0023] The beneficial effect of the above arrangement is that the air flow flows through the heat exchanger 400 along the first direction x, so the heat exchange amount of the air flow with the leeward side area of the heat exchanger 400 is lower than the heat exchange amount of the air flow with the windward side of the heat exchanger 400, by arranging the area of the plurality of cross sections of the heat exchanger 400 to increase along the first direction x, it is beneficial to increase the contact area of the air flow with the heat exchanger 400 along the first direction x, and further can increase the heat exchange amount of the air flow with the leeward side of the heat exchanger 400, so as to improve the uniformity of the heat exchange amount of each area of the heat exchanger 400, and improve the heat exchange efficiency of the heat exchanger 400 as a whole.

[0024] In an application scenario, according to the simulation results, by the above manner, in a limited space, the heat exchange efficiency of the heat exchanger can be increased by 24%, the drying time can be reduced by 20%, the air duct resistance can be reduced, the air volume can reach 100m 3 / h-140m 3 / h; and the heat exchanger applied to the washing and drying integrated heat pump system can effectively improve the space utilization, make the product design more reasonable and more compact; the heat exchanger applied to the washing and drying integrated heat pump system can also reduce the temperature of the heat pump system, so that the whole heat pump system works at a maximum temperature below 90℃, and the use safety is improved.

[0025] In some embodiments, the heat exchanger 400 is used in the drying equipment 10, and the side surface of the heat exchanger 400 close to the drum is arranged in a stepped manner.

[0026] Specifically, the side surface of the heat exchanger 400 close to the drum is arranged in a stepped manner to further match the shape of the drum, that is, in all cross sections of the heat exchanger 400, the areas of some adjacent cross sections are equal, and the areas of the cross sections of the heat exchanger 400 increase in a stepped manner along the first direction x, which is convenient for structure design and assembly.

[0027] In other embodiments, the side surface of the heat exchanger 400 close to the drum can also be arranged in an arc shape, that is, the cross sections of the heat exchanger 400 gradually increase along the first direction x, so as to more closely match the shape of the drum, fully utilize the space of the outer periphery of the drum, and improve the compactness of the overall structure.

[0028] In some embodiments, the projection of the cross section with a large area along the first direction x can completely cover the projection of the cross section with a small area, the side surface of the heat exchanger 400 away from the drum is located in a plane parallel to the first direction x, the side surface of the heat exchanger 400 close to the drum is arranged in a stepped manner, and the axis of the drum is perpendicular to the first direction x.

[0029] This arrangement can make the heat exchanger 400 flush with the side of the drum, and as close as possible to the shape of the drum on the side close to the drum, thus facilitating the overall structure of the aesthetic, and both to make full use of the space around the drum, improve the heat exchange space of the heat exchanger 400.

[0030] In some embodiments, referring to Figure 6 , the heat exchanger 400 includes a plurality of spaced fins 410, the fins 410 extend along the first direction x, and the cross section is between the two fins 410 farthest apart.

[0031] The refrigerant pipe 420 of the heat exchanger 400 is arranged on the fin 410.

[0032] For example, in some application scenarios, the fin 410 extends in the first direction x and the second direction y to form a main heat exchange surface, so that the main heat exchange surface is parallel to the first direction x and the second direction y, and a plurality of fins 410 are spaced apart in a third direction z perpendicular to the first direction x and the second direction y. The product of the distance Lf between the two fins 410 farthest apart in the third direction z and the size Hf of the fin 410 in the second direction y can be used as the area of the cross section of the heat exchanger 400, and the area increases along the first direction x.

[0033] In other embodiments, the heat exchanger can also include a single fin, and the fin can have grooves extending in the first direction x to facilitate airflow through the heat exchanger.

[0034] In some embodiments, referring to Figure 6 , the heat exchanger 400 includes a serpentine disc-shaped refrigerant pipe 420, the refrigerant pipe 420 is arranged on the fin 410, and the refrigerant pipe 420 at least partially extends in the third direction z. The product of the length L of the refrigerant pipe 420 in the third direction z and the size Hf of the fin 410 in the second direction y can be used as the area of the cross section of the heat exchanger 400, and the area is arranged to increase along the first direction x.

[0035] In some embodiments, the ratio between the areas of adjacent cross sections of different areas is 1.1 to 2.

[0036] It should be noted that the heat exchanger 400 includes at least two cross sections with different areas, and the area ratio between the two adjacent cross sections is 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.86, 1.9 or 2, etc. In some application scenarios, the area of the cross section of the heat exchanger 400 increases in steps, and the area ratio between the two adjacent cross sections is 1.1 to 2. This arrangement facilitates structural design and assembly; it can be adjusted according to the use requirements of the product; in other embodiments, other values can also be taken.

[0037] In other embodiments, the cross section of the heat exchanger can also gradually increase in continuity. For example, the cross section of the heat exchanger can gradually increase in size by arranging the fins to gradually increase in size in a second direction perpendicular to the first direction.

[0038] In some embodiments, the ratio of the areas between two adjacent cross sections can be 4 / 3, which can further optimize the heat exchange efficiency of the heat exchanger 400 as a whole, and improve the convenience of production and assembly, so that the heat exchanger 400 can better fit the shape of the drum.

[0039] In some embodiments, the heat exchanger 400 of the present application is used in the heat pump system 11 and the drying apparatus 10, and the ratio can be adjusted according to the structural design of the product to optimize the heat exchange performance of the heat exchanger 400, and more fully utilize the space inside the drying apparatus 10 to further improve the compactness of the overall structure.

[0040] The present application further provides a heat pump system, as shown in Figures 1 to 7 The heat pump system 11 includes a compressor, an evaporator 100, and a condenser 500, the condenser 500 includes the heat exchanger 400 described above, and the compressor, the condenser 500, and the evaporator 100 form a refrigerant circulation channel.

[0041] The specific embodiments and working principles of the heat exchanger 400 can be referred to the above embodiments, which will not be described here.

[0042] The heat pump system 11 of the present application can be used in the drying apparatus 10, for example, the heat pump system 11 of the present application can be used to dry humid air flow, etc.; the refrigerant circulates in the refrigerant circulation channel, and can exchange heat with the outside air flow through the refrigerant pipes, fins, etc. of the evaporator 100 and the condenser 500.

[0043] In an application scenario, refer to Figure 1 , Figure 2The drying equipment 10 comprises a drying chamber 200 in communication with the heat exchange cavity, the drying chamber 200 is used for accommodating the drying objects, the evaporator 100 and the condenser 500 are arranged in the heat exchange cavity; the condenser 500 and the evaporator 100 are connected in series between the outlet of the compressor and the inlet of the compressor, so that the circulation of the refrigerant is realized through the compressor, the condenser 500 and the evaporator 100; the humid air flow in the drying chamber 200 flows into the heat exchange cavity, when the humid air flow flows through the evaporator 100, the water drops are condensed on the surface of the evaporator 100, the heat exchange between the humid air flow and the evaporator 100 is realized, and the humid air flow is converted into the dry air flow; the dry air flow flows through the condenser 500 to absorb heat, and becomes the high-temperature dry air flow; the high-temperature dry air flow flows into the drying chamber 200, so that the drying objects in the drying chamber 200 are heated and dried; 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 drying objects in the drying chamber 200.

[0044] The heat pump system 11 further comprises a throttling component arranged between the condenser 500 and the evaporator 100; the compressor is the power source of the heat pump system 11, and is used for changing the low-temperature and low-pressure refrigerant vapor from the evaporator 100 into high-temperature and high-pressure refrigerant vapor through adiabatic compression to supply the condenser 500; the condenser 500 condenses the high-temperature and high-pressure refrigerant vapor from the compressor under the condition of constant pressure, and radiates heat to the heat exchange cavity, that is, the heat exchange between the condenser 500 and the air flow in the heat exchange cavity is realized, and the refrigerant in the condenser 500 becomes high-pressure supercooled liquid; the high-pressure supercooled liquid from the condenser 500 becomes low-temperature and low-pressure refrigerant vapor through the throttling component, and enters the evaporator 100 to evaporate; the low-temperature and low-pressure refrigerant 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 air flow entering the heat exchange cavity) in the heat exchange cavity, and changes into low-temperature and low-pressure refrigerant vapor to the compressor, and the water vapor in the wet heat medium in the heat exchange cavity is condensed into condensed water and discharged.

[0045] In the process of normal operation of the heat pump system 11, for example, in the process of completely dehumidifying and heating the air flow, the heat exchange amount of the condenser 500 is usually greater than that of the evaporator 100, because the condenser 500 needs to heat the dry air flow to become high-temperature dry air flow.

[0046] The condenser 500 of the heat pump system 11 of the embodiment comprises the heat exchanger 400, the heat exchange performance of the heat pump system 11 can be improved, and the heat pump system 11 of the embodiment can be used for the drying equipment 10, so that the area of the cross section of the heat exchanger 400 increases along the first direction x, the total heat exchange efficiency of the heat exchanger 400 can be improved, and the space in the drying equipment 10 can be used as much as possible, and the compactness of the overall structure is improved.

[0047] The application further provides a drying equipment, which refers to Figures 1 to 7The drying apparatus 10 comprises a drying chamber 200, an air duct shell 13, the heat pump system 11 described above, the air duct shell 13 is formed with a heat exchange cavity in communication with the drying chamber 200; at least the evaporator 100 and the condenser 500 are arranged in the heat exchange cavity.

[0048] 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 drying object, and the drying chamber 200 of the present application can be used as a separate drying chamber 200, and can also be used as a drying and washing chamber, which is not limited in particular.

[0049] The specific implementation and working principle of the heat pump system 11 can be referred to the above embodiment, which will not be repeated here.

[0050] The heat exchange cavity is in communication with the drying chamber 200, and the evaporator 100 and the condenser 500 are arranged in the heat exchange cavity, so that the evaporator 100 and the condenser 500 can exchange heat with the drying chamber 200, improve the drying efficiency of the drying chamber 200, and reduce the interference of the external environment on the evaporator 100 and the condenser 500, improve the working efficiency and reduce the probability of damage; and the above heat exchanger 400 is used in the drying apparatus 10, which can improve the drying efficiency of the drying apparatus 10, and make the overall structure of the drying apparatus 10 more compact.

[0051] In some embodiments, the drying chamber 200 comprises a drum, the drum and the condenser 500 are distributed along the radial direction of the drum, and when the axis of the drum is parallel to the horizontal plane, the vertical line from the condenser 500 to the axis of the drum and the direction of gravity of the drum are arranged at an acute angle or an obtuse angle.

[0052] It should be noted that when the axis of the drum is parallel to the horizontal plane, the connecting line between the condenser 500 and the axis of the drum is arranged at an acute angle or an obtuse angle with the direction of gravity of the drum, that is, the arrangement direction of the condenser 500 and the drum is arranged at an acute angle or an obtuse angle with the direction of gravity, for example, the condenser is arranged obliquely above or below the drum.

[0053] The above arrangement is convenient for locating the condenser 500 on the side of the drum and obliquely above or below the drum, that is, fully utilizing the outer peripheral space of the drum, which is convenient for reducing the overall size of the drying apparatus 10 in the direction of gravity and improving the structural compactness of the drying apparatus 10.

[0054] In some embodiments, referring to Figure 4 The condenser 500 (i.e. the heat exchanger 400) comprises three or more cross sections with different areas, and the ratio between the areas of adjacent cross sections is 1.1 to 2; optionally, the ratio between the areas of adjacent cross sections is different, for example, the ratio can be increased along the first direction x, so that the condenser 500 can be as close as possible to the outer periphery of the drum, and the structural compactness is improved.

[0055] In other embodiments, similar improvements can also be made to the evaporator, i.e., the overall structure of the evaporator and / or the condenser is adaptively shaped according to the installation space, so as to no longer be a regular cuboid or cubic structure, but to make full use of the installation space in the shell and ensure heat exchange efficiency.

[0056] In other embodiments, the direction of the axis can be set to be an angle with the horizontal direction according to the product structure needs, and the position of the condenser can be adjusted accordingly according to the above embodiments to optimize the overall structure of the drying equipment and improve the structural compactness.

[0057] In some embodiments, the diameter of the drum is 540mm to 570mm, and the size of the condenser 500 along the first direction x is 50mm to 100mm.

[0058] 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 needs of the product. Of course, other values can also be taken in other embodiments.

[0059] Specifically, the size of the condenser 500 along the first direction x is 50mm, 53mm, 55mm, 60mm, 65mm, 66mm, 68mm, 6mm, 70mm, 75mm, 77mm, 80mm, 85mm, 86mm, 90mm, 95mm, 99mm or 100mm, etc., which can be adjusted according to the use needs of the product. Other values can also be taken in other embodiments.

[0060] The size of the condenser 500 along the first direction x can be adjusted according to the diameter of the drum, so as to make the projection of the condenser 500 in the direction of gravity coincide with the projection of the drum in the direction of gravity as much as possible, thereby reducing the size of the drying equipment 10 in the first direction x and improving the compactness of the overall structure.

[0061] In some embodiments, the axes of the drum are respectively perpendicular to the first direction x and the arrangement direction of the evaporator 100 and the drum, and the evaporator 100 and the condenser 500 are arranged along the first direction x.

[0062] Since the arrangement direction of the evaporator 100 and the drum is perpendicular to the axis of the drum, the evaporator 100 and the drum are distributed along the radial direction of the drum, and therefore the above arrangement facilitates the arrangement of the evaporator 100 and the condenser 500 along the circumferential direction of the drum, so as to make full use of the space outside the drum and improve the space utilization.

[0063] In an application scenario, the evaporator 100 is located directly above the drum, and the condenser 500 is arranged obliquely above the drum, so that the drum can provide support for the evaporator 100 and the condenser 500, and the overall structure is convenient to design and assemble.

[0064] In some embodiments, the arrangement direction of the evaporator 100 and the drum is the second direction y, and the axis of the drum, the first direction x, and the second direction y are perpendicular to each other, so that the overall structure can be optimized.

[0065] In some embodiments, referring to Figure 4 、 Figure 5 , the axis of the drum is parallel to the horizontal plane, the axis of the drum, the first direction x, and the arrangement direction of the evaporator 100 and the drum are perpendicular to each other, the side of the condenser 500 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 500 close to the drum and the center point of the drum decreases along the first direction x.

[0066] It should be noted that the height difference between the side of the condenser 500 close to the drum and the center point of the drum refers to the distance between the side of the condenser 500 close to the drum and the center point of the drum in the arrangement direction of the evaporator 100 and the drum (i.e., the second direction y), for example, when the second direction y is parallel to the direction of gravity, the height difference is the height difference between the bottom of the condenser 500 and the center point of the drum in the direction of gravity.

[0067] The above arrangement is convenient to increase the size of the condenser 500 along the arrangement direction of the evaporator 100 and the drum (i.e., the second direction y), and thus can increase the heat exchange amount of the airflow and the leeward side of the condenser 500, so that the heat exchange uniformity of each region of the condenser 500 can be improved; further, the side of the condenser 500 away from the drum and the side of the evaporator 100 away from the drum are located in the same horizontal plane, which is convenient for the structural design and assembly of the drying equipment 10, and improves the aesthetics of the overall structure; further, the height difference decreases along the first direction x, so that the bottom of the condenser 500 can be as close as possible to the drum wall, that is, the bottom of the condenser 500 is not a plane, for example, it can be arranged in a stepped or arc shape, which is convenient to increase the heat exchange space of the condenser 500 as much as possible, improve the heat exchange efficiency of the condenser 500, improve the utilization rate of the internal space of the drying equipment 10, improve the compactness of the overall structure, and facilitate the miniaturization design of the overall structure.

[0068] It should be noted that the arrangement of the drum and the evaporator 100 along the second direction y means that the projection of the evaporator 100 in a direction perpendicular to the second direction y and the projection of the drying chamber 200 in the direction are completely staggered and not overlapped; in this application, the projection refers to the orthographic projection.

[0069] In some embodiments, the diameter of the drum is 540mm to 570mm; along the first direction x, the size of the condenser 500 along the arrangement direction of the evaporator 100 and the drum is increased from 63mm to 84mm.

[0070] In an application scenario, the evaporator 100 is arranged directly above the drum, so 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 arranged parallel to the direction of gravity, and since the condenser 500 and the evaporator 100 are arranged along the first direction x perpendicular to the axis of the drum, the above arrangement facilitates the arrangement of the condenser 500 obliquely above the drum, and therefore, by increasing the size of the condenser 500 along the direction of gravity of the drum from 63mm to 84mm, it is facilitated to utilize the space of the outer periphery of the drum as much as possible, and the heat exchange efficiency of the leeward side of the condenser 500 can be improved, thereby improving the overall heat exchange uniformity of the condenser 500.

[0071] 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.

[0072] Along the first direction x, the size of the condenser 500 along the arrangement direction of the evaporator 100 and the drum is increased from 63mm to 84mm, which means that the area of the cross section of the condenser 500 is increased along the first direction x by increasing the size of the condenser 500 along the arrangement direction of the evaporator 100 and the drum.

[0073] It should be noted that the size can be gradually increased from 63mm to 84mm, or it can be increased in steps. When it is increased in steps, it can be increased by a corresponding ratio, for example, the ratio between the values of the sizes of two adjacent sizes can be any value between 1.1 and 2, for example, 4 / 3, etc., to realize that the ratio between the areas of adjacent cross sections of different areas is 1.1 to 2.

[0074] In other embodiments, the axis of the drum can also be non-perpendicular to the first direction, which can be adjusted according to the actual use requirements of the product, and will not be described here.

[0075] In other embodiments, the axis of the drum can also be parallel to the direction of gravity, etc., and the positions of the evaporator and the condenser can be arranged correspondingly according to the above embodiments to improve the compactness of the structure.

[0076] In some embodiments, the windward area of the condenser 500 can also be increased by arranging the size of the condenser 500 along the second direction y to be larger than the size of the evaporator 100, thereby improving the heat exchange capacity of the condenser 500.

[0077] In some embodiments, referring to Figure 3 , the heat pump system 11 further comprises a fan 12 arranged at the air inlet of the air duct housing 13 to guide the air in the heat exchange cavity to the drying chamber 200, and the fan 12 is arranged at the side of the condenser 500 away from the evaporator 100.

[0078] The fan 12 is used to promote the circulation of air in the heat exchange cavity and the drying chamber 200; the fan 12 is arranged at the side of the condenser 500 away from the evaporator 100, which facilitates the optimization of the structural design, so that the air inlet of the fan 12 is in communication with the heat exchange cavity, and the air outlet is in communication with the drying chamber, so that the fan 12 can guide the air from the evaporator 100 to the condenser 500, and then guide the air flowing out of the condenser 500 to the drying chamber 200.

[0079] In other embodiments, the air duct structure and the position of the fan can also be adjusted according to requirements. For example, the fan can also be arranged at 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 is arranged in communication with the drying chamber.

[0080] In some embodiments, the air volume of the fan 12 is 120m 3 / h. This setting facilitates the provision of sufficient circulating air flow for the exchange of air between the heat exchange cavity and the drying chamber 200, and improves the drying efficiency of the drying equipment 10.

[0081] In other embodiments, the air volume design of the fan can be adjusted according to the use requirements of the product.

[0082] In some embodiments, referring to Figure 1 , the air duct housing 13 is arranged above the drum, and one or more of the evaporator 100, the condenser 500, the compressor, and the fan 12 are connected to the air duct housing 13, and the air duct housing 13 supports one or more of the evaporator 100, the condenser 500, the compressor, and the fan 12 to improve the structural stability of the drying equipment 10, etc.

[0083] It should be noted that the specific connection method between the air duct housing 13 and the air duct housing 13 is not limited, such as fixed connection or detachable connection, etc.

[0084] In some embodiments, the air duct housing 13 can be provided with a mounting position outside the heat exchange cavity for mounting the compressor, the fan 12, etc.

[0085] By integrating the compressor, the fan 12, the condenser 500, and the evaporator 100 through the air duct housing 13, the structural layout can be optimized, the structural stability can be improved, and the structural volume can be reduced.

[0086] In some embodiments, the evaporator 100 is arranged close to the air inlet of the heat exchange cavity, the condenser 500 is arranged close to the air outlet of the heat exchange cavity, and the air outlet of the heat exchange cavity is in communication with the air inlet of the drying chamber 200, so as to optimize the structure of the entire drying device 10.

[0087] In some embodiments, the axis of the drum is perpendicular to the first direction x and the second direction y, and the third direction z is parallel to the axis of the drum; 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 500 and the fan 12 are arranged along the first direction x in sequence, and the condenser 500 is arranged obliquely above the drum; along the first direction x, the area of the second windward surface of the condenser 500 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 direct contact area of the windward side of the condenser 500 with the airflow is greater than the direct contact area of the windward side of the evaporator 100 with the airflow, so as to improve the heat exchange capacity of the condenser 500).

[0088] Further, the diameter of the drum is in the range of 540mm to 570mm, the distance between the evaporator 100 and the condenser 500 along the first direction x is in the range of 5mm to 35mm, and the height difference between the bottom of the evaporator 100 and the bottom of the condenser 500 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 500 and the center point of the drum is in the range of 210mm to 267mm.

[0089] Further, the condenser 500 is located on the side of the fan 12 close to the evaporator 100, and the height difference between the condenser 500 and the center of the fan shaft 123 of the fan 12 along the second direction y is in the range of -10mm to 30mm; the height of the condenser 500 along the second direction y is in the range of 60mm to 100mm, and the impeller diameter of the fan 12 is in the range of 100mm to 170mm; the outer diameter of the first refrigerant pipe of the evaporator 100 is 5mm; the outer diameter of the second refrigerant pipe of the condenser 500 is 7mm; and the air volume of the fan 12 is 120m 3 / h.

[0090] Further, the evaporator 100 comprises a plurality of first fins arranged at intervals along the third direction z, and the interval distance between adjacent two first fins along the third direction z is 1.5mm; the condenser 500 comprises a plurality of second fins arranged at intervals along the third direction z, and the interval distance between adjacent two second fins is 1.2mm.

[0091] The above arrangement facilitates improving the heat exchange efficiency of the drying device 10 as a whole, thereby saving energy and improving the compactness of the overall structure.

[0092] In some embodiments, the height of the condenser 500 in the second direction y can be adjusted according to the impeller diameter of the fan 12 to maximize the coincidence of the projection of the condenser 500 and the impeller of the fan 12 in the horizontal direction, thereby facilitating reducing the air resistance of the airflow flowing from the condenser 500 to the fan 12 and improving the airflow circulation speed.

[0093] In some embodiments, the refrigerant flows from the condenser 500 to the evaporator 100, the refrigerant outlet of which is arranged close to the evaporator 100, and the refrigerant inlet of which is arranged away from the evaporator 100; as shown in Figure 7 Figure 7 is a schematic diagram of the flow of refrigerant in the condenser, when the refrigerant flows in the condenser 500, in the direction parallel to the first direction x, the refrigerant flows in the opposite direction to the first direction x, from the side of the condenser 500 away from the evaporator 100 to the side of the condenser 500 close to the evaporator 100; in the row of refrigerant tubes of the condenser 500 farthest from the evaporator 100, the refrigerant flows in the second direction y from the side of the condenser 500 away from the drying chamber 200 to the side of the condenser 500 close to the drying chamber 200; such an arrangement can improve the uniformity and efficiency of overall heat exchange.

[0094] In some embodiments, referring to Figure 3 , the bottom of the condenser 500 is fixed to the air duct housing 13, and the height of the part of the air duct housing 13 located at the bottom of the condenser 500 in the second direction y is 10mm to 40mm (for example, it can be 10mm, 12mm, 13mm, 14mm, 15mm, 20mm, 21mm, 25mm, 28mm, 30mm, 35mm or 40mm, etc.), that is, the distance between the bottom of the condenser 500 and the drum is 10mm to 40mm, facilitating the installation and fixation of the condenser 500.

[0095] Unlike the prior art, the airflow flows through the heat exchanger in the first direction, so the heat exchange amount of the airflow with the leeward side area of the heat exchanger is lower than that of the windward side of the heat exchanger. By increasing the area of the multiple sections of the heat exchanger in the first direction, it is beneficial to increase the contact area of the airflow with the heat exchanger in the first direction, thereby increasing the heat exchange amount of the airflow with the leeward side of the heat exchanger, and thus improving the uniformity of the heat exchange amount of each area of the heat exchanger, and improving the overall heat exchange efficiency of the heat exchanger.

[0096] It is worth noting that the drawings in this paper only demonstrate 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.

[0097] ​The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made according to the content of the present application specification and drawings, is also included in the patent protection scope of the present application.

Claims

1. A heat exchanger, characterized in that: The heat exchanger has a plurality of cross sections arranged in parallel along a first direction, the areas of the plurality of cross sections increase along the first direction, and the cross sections are perpendicular to the first direction; The heat exchanger is provided with a windward side and a leeward side, and the first direction points from the windward side to the leeward side.

2. The heat exchanger according to claim 1, characterized in that Used in drying equipment, the heat exchanger is arranged in a stepped manner on the side facing the drum of the drying equipment.

3. The heat exchanger according to claim 2, characterized in that The ratio between the areas of adjacent cross sections of different areas is 1.1 to 2.

4. The heat exchanger according to claim 3, characterized in that The ratio is 4 / 3.

5. The heat exchanger according to any one of claims 1 to 4, characterized in that: The heat exchanger includes a plurality of fins arranged at intervals, the fins extending along the first direction, and the cross section is located between two of the fins that are farthest apart.

6. A heat pump system, characterized in that: The heat pump system comprises: compressor; evaporator; A condenser, wherein the condenser comprises the heat exchanger according to any one of claims 1 to 5, and the compressor, the condenser and the evaporator form a refrigerant circulation channel.

7. A drying device, characterized in that: The drying equipment comprises: drying room; an air duct housing, wherein the air duct housing is formed with a heat exchange cavity communicating with the drying chamber; In the heat pump system according to claim 6, at least the evaporator and the condenser are arranged in the heat exchange chamber.

8. The drying device according to claim 7, characterized in that: The drying chamber includes a drum, and the drum and the condenser are arranged along the radial direction of the drum. When the axis of the drum is parallel to the horizontal plane, the perpendicular line from the condenser to the axis is set at an acute angle or an obtuse angle with the gravity direction of the drum.

9. The drying device according to claim 8, characterized in that: The diameter of the drum is 540 mm to 570 mm, and the dimension of the condenser along the first direction is 50 mm to 100 mm.

10. The drying device according to claim 7, characterized in that: The axis of the drum is respectively arranged perpendicular to the first direction and the arrangement direction of the evaporator and the drum, and the evaporator and the condenser are arranged along the first direction.

11. The heat exchanger according to claim 10, characterized in that The axis of the drum is parallel to the horizontal plane, the axis, the first direction, and the arrangement direction are perpendicular to each other, the side of the condenser facing away from the drum and the side of the evaporator facing 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 decreases along the first direction.

12. The drying device according to claim 11, characterized in that: The diameter of the drum is 540 mm to 570 mm; along the first direction, the size of the condenser along the arrangement direction increases from 63 mm to 84 mm.

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