Heat pump apparatus

Abstract

The invention discloses heat pump equipment, and belongs to the technical field of household appliances. The heat pump equipment comprises a box body, a heat pump assembly, a fan, a pipeline assembly and an electric control box, the heat pump assembly, the fan, the pipeline assembly and the electric control box are installed in the box body, an inner cavity of the box body is divided into an air inlet cavity and an air outlet cavity through the first heat exchanger, the compressor, the second heat exchanger, the pipeline assembly and the electric control box are arranged in the air inlet cavity, and the fan is arranged in the air outlet cavity. The second heat exchanger is connected with the compressor and the first heat exchanger through a refrigerant pipeline to form a refrigerant circulation loop, the second heat exchanger is connected with the water inlet pipe and the water outlet pipe through water flow pipelines to form a water supply pipeline, and the electric control box can turn over to move into the air inlet cavity from the opening or move out of the air inlet cavity from the opening. And the electric control box is overturned around the rotating connection position, so that the compressor, the second heat exchanger, a refrigerant pipeline, a water flow pipeline, a water pump and other parts are conveniently overhauled, the electric control box does not need to be disassembled, and the overhauling efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular to a heat pump device. Background Art

[0002] In the related art, the integral heat pump equipment integrates the refrigerant circulation loop and the water flow pipeline into an all-in-one machine. The internal structure layout is relatively compact. Although it can save space, the piping structure layout of the refrigerant circulation loop and the water supply is relatively complex, and the electrical control box and the pipeline structure are installed in the same space. During maintenance, it is necessary to disassemble the outer casing, electrical control box and other components, which makes it inconvenient to repair the internal parts. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a heat pump device that can realize quick operation to expose internal components, making it easy to inspect and repair the internal components.

[0004] According to an embodiment of the present invention, a heat pump device comprises a housing, a heat pump assembly, a fan, a pipeline assembly and an electric control box. One side of the housing is provided with an opening and a panel that can be detachably covered on the opening. The heat pump assembly comprises a compressor, a first heat exchanger and a second heat exchanger. The first heat exchanger is arranged in the housing and separates the inner cavity of the housing into an air inlet cavity and an air outlet cavity. The compressor and the second heat exchanger are arranged in the air inlet cavity. The second heat exchanger comprises a refrigerant pipeline and a water flow pipeline. The refrigerant pipeline, the compressor, the The first heat exchanger and the second heat exchanger are connected to form a refrigerant circulation loop; the fan is arranged in the air outlet chamber; the pipeline assembly is arranged in the air inlet chamber, and the pipeline assembly includes a water pump, a water inlet pipe and a water outlet pipe connected to the water flow pipeline; the electric control box is arranged in the air inlet chamber and close to the opening, and the electric control box is rotatably connected to the box body. The electric control box can be flipped and moved into the air inlet chamber from the opening, or moved out of the air inlet chamber from the opening to reveal the compressor, the second heat exchanger and the pipeline assembly.

[0005] The heat pump device according to the embodiment of the present invention has at least the following beneficial effects: The heat pump assembly, the fan, the pipeline assembly and the electric control box are installed in the box body. The inner cavity of the box body is divided into an air inlet cavity and an air outlet cavity by the first heat exchanger. The compressor, the second heat exchanger, the pipeline assembly and the electric control box are arranged in the air inlet cavity. The fan is arranged in the air outlet cavity. The second heat exchanger is connected with the compressor and the first heat exchanger through the refrigerant pipeline to form a refrigerant circulation loop. The second heat exchanger is connected with the water inlet pipe and the water outlet pipe through the water flow pipeline to form a water supply pipeline. The air is taken in through the air inlet cavity and discharged from the air outlet cavity after passing through the first heat exchanger, so that the first heat exchanger can be connected with the outdoor air. The air is heat exchanged; the electric control box is arranged in the air inlet cavity and close to the opening. The electric control box is rotatably connected to the box body. The electric control box can be flipped over and moved into the air inlet cavity from the opening, or moved out of the air inlet cavity from the opening. When the heat pump equipment needs to be repaired, the panel is opened and the electric control box is flipped around the rotating connection position to open the air inlet cavity to reveal the compressor, the second heat exchanger and the pipeline assembly, which is convenient for repairing the compressor, the second heat exchanger, the refrigerant pipeline, the water pipeline, the water pump and other components. There is no need to disassemble the electric control box. The operation is simple and quick, which effectively improves the repair efficiency.

[0006] According to some embodiments of the present invention, the box body comprises a bottom plate, a side plate, a top cover and the panel, the side plate surrounds and defines the opening, and the bottom plate and the top cover are respectively connected to two ends of the side plate; The heat pump device further comprises a hinge structure, and the electric control box is rotatably connected to one of the chassis, the side plate and the top cover via the hinge structure.

[0007] According to some embodiments of the present invention, the electric control box is arranged along the height direction of the box body, one side of the electric control box is rotatably connected to the side panel through the hinge structure, and the other side of the electric control box away from the hinge structure is provided with a lug, and the lug is detachably connected to the top cover or the chassis.

[0008] According to some embodiments of the present invention, the hinge structure includes a first hinge and a second hinge that are detachably connected, the first hinge is fixed to the electrical control box, the second hinge is fixed to the box body, one of the first hinge and the second hinge is provided with an axial hole, and the other is provided with a hinge shaft rotatably connected to the axial hole.

[0009] According to some embodiments of the present invention, the electric control box comprises an electric control board, a box body and a box cover, the box body and the box cover enclose an installation cavity, the electric control board is arranged in the installation cavity and connected to the box body; The outer surface of the box body is provided with a metal shell, and the first hinge is fixedly connected to the metal shell.

[0010] According to some embodiments of the present invention, the electric control box comprises an electric control board, a box body and a box cover, the box body and the box cover enclose an installation cavity, the electric control board is arranged in the installation cavity and connected to the box body; An electric control element and a heat sink are provided on one side of the electric control board facing the box cover, wherein the electric control element includes a first heating element, and the heat sink is connected to the electric control board and abuts against the heating surface of the first heating element; The box cover is provided with a through hole, the radiator passes through the through hole and is at least partially exposed outside the box cover, and when the electric control box is located inside the air inlet cavity, the box cover is arranged toward the air inlet cavity.

[0011] According to some embodiments of the present invention, the electric control element further comprises a second heating device, the box cover is provided with an air duct, and the second heating device is at least partially located in the air duct; The air inlet of the air duct is arranged toward the radiator, and the air outlet of the air duct is located at one side of the electric control box and is arranged toward the first heat exchanger when the electric control box is located inside the air inlet cavity.

[0012] According to some embodiments of the present invention, the heat sink and the air duct are arranged in sequence from top to bottom along the height direction of the electric control box, the box cover is provided with a first baffle and a second baffle, the first baffle is arranged at the air outlet in the horizontal direction, the second baffle is located in the air duct and is staggered with the first baffle in the up-down direction to form an air guide channel in the air duct, and the air guide channel is located between the air inlet and the second heating device; At least a portion of the second baffle is tilted downward in a direction away from the second heat generating device.

[0013] According to some embodiments of the present invention, one end of the second baffle away from the first baffle extends downward along the air duct and is arranged opposite to the second heating device. Along the direction perpendicular to the box cover toward the box body, the projection of the second baffle covers the projection of the second heating device.

[0014] According to some embodiments of the present invention, a convex portion is provided on a side of the box cover facing away from the electric control board, the convex portion is arranged adjacent to the radiator and is located below the radiator, the air duct is formed in the convex portion, and the air inlet is formed on a side of the convex portion facing the radiator; The box cover is further provided with a third baffle extending upwards, and along the direction from the box cover toward the box body, the third baffle and the first baffle are sequentially arranged on two opposite sides of the air inlet.

[0015] According to some embodiments of the present invention, the box body includes a back plate and a first shell, the back plate is connected to the electric control board, and the first shell covers a side of the back plate away from the electric control board; The box cover comprises a cover plate and a second shell, the cover plate is connected to the back plate to define the installation cavity, and the second shell covers a side of the cover plate away from the electric control board; A groove is formed on the side of the cover plate away from the electric control board, and the second shell and the groove define the air duct; the back plate and the cover plate are both insulating parts, and the first shell and the second shell are both metal shells.

[0016] According to some embodiments of the present invention, the air inlet is opened in the second shell, and the first baffle plate and the second baffle plate are arranged on the cover plate and are an integrally formed structure with the cover plate.

[0017] The electric control board is also provided with a plurality of connection terminals, and the plurality of connection terminals are arranged on a side of the electric control board facing the box cover; The heat pump device also includes a functional device arranged in the air inlet chamber, the functional device includes at least one of a sensor and a control valve, and the plurality of wiring terminals are electrically connected to the functional device, the compressor and the fan through wires.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 A schematic structural diagram of a heat pump device according to an embodiment of the present invention (with panels removed); Figure 2 This is a schematic structural diagram of a heat pump device according to an embodiment of the present invention (the electric control box is turned outward); Figure 3 A cross-sectional schematic diagram of a heat pump device according to an embodiment of the present invention (wiring status of an electric control box); Figure 4 for Figure 1 A partial enlarged view of the middle A; Figure 5 for Figure 3 A partial enlarged view of point B in the middle; Figure 6 It is a schematic diagram of the exploded structure of an electric control box according to an embodiment of the present invention; Figure 7 A schematic structural diagram of a cover plate according to an embodiment of the present invention; Figure 8It is a front structural schematic diagram of an electric control box according to an embodiment of the present invention; Fig. 9 for Figure 3 Schematic diagram of the cross-sectional structure in the CC direction; Fig.10 for Fig. 9 A partial enlarged view of point D in the middle.

[0020] Figure Number: Heat pump equipment 10; Box body 100; air inlet cavity 101; air outlet cavity 102; opening 103; chassis 110; side plate 120; top cover 130; air inlet 131; air outlet 132; air duct connector 133; connecting hole 134; Heat pump assembly 200; compressor 210; first heat exchanger 220; evaporator 221; second heat exchanger 230; plate heat exchanger 231; water flow pipeline 2311; first refrigerant pipeline 240; second refrigerant pipeline 250; Fan 300; Electric control box 400; air duct 401; air guide channel 4011; air inlet 402; air outlet 403; electric control board 410; second heating element 411; inductor 4111; terminal 412; box body 420; back plate 421; first shell 422; lug 4221; box cover 430; through hole 4301; cover plate 431; convex part 4311; groove 4312; first baffle 4313; second baffle 4314; first plate 4314a; second plate 4314b; second shell 432; cover 4321; opening 4322; third baffle 4323; radiator 440; sealing ring 441; terminal block 450; wire 460; Pipeline assembly 500; water pump 510; water inlet pipe 520; water outlet pipe 530; Hinge structure 600 ; first hinge 610 ; shaft sleeve 611 ; second hinge 620 ; hinge shaft 621 . DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] In the related art, in order to save installation space, some heat pump water heaters integrate the refrigerant circulation loop and water flow pipeline into an all-in-one machine, also known as an integrated heat pump device, which is connected to the indoor space through a water pipe to supply the heat demand for domestic hot water and space heating. The electrical control box, refrigerant circulation loop, water flow pipeline and other components are arranged in the same space, and the internal structure layout is relatively compact. The electrical control box of the heat pump equipment is located below the top cover and above the middle partition. Therefore, the maintenance of the electrical control box requires disassembling the front panel, top cover and left and right side panels, and then loosening the fixing bolts of the electrical control box and the middle partition before starting to disassemble and assemble the electrical control box body, which makes it inconvenient to inspect the internal components; and most of the water circuit components are blocked by the electrical control box, requiring a large amount of side space for inspection.

[0026] Other heat pump products use an integrated casing. When maintenance is required, the entire casing must be removed first, and then the electrical control box must be disassembled before the internal components can be inspected. The operation is also relatively cumbersome, and many components are located on both sides of the fuselage, making it difficult to inspect directly from the front of the fuselage. It is necessary to enter both sides of the fuselage for maintenance, and it is also necessary to reserve maintenance space on the left and right sides of the fuselage.

[0027] Therefore, the integrated heat pump equipment in the related technology has certain requirements for the installation environment, and requires a certain amount of installation and maintenance space on the top or left and right directions, thereby occupying the limited indoor space and limiting the installation scene. In addition, since the evaporator needs to exchange heat with the outdoor environment, the heat pump equipment, as an outdoor unit, needs to be installed in the outdoor environment. Once the water circuit and other parts fail and need to be repaired, complex steps are required to complete the disassembly and maintenance, which will increase the cost; especially for residents on higher floors, the installers need to work in the outdoor high-altitude environment for installation and maintenance, which not only has high installation and maintenance costs, but also brings extremely high risks to the installation process.

[0028] To this end, an embodiment of the present invention provides a heat pump device 10, which adopts a flip-type electric control box structure, and can realize quick operation to expose internal components, so as to facilitate the maintenance of the internal components. The heat pump device 10 is described below with a specific embodiment.

[0029] Reference Figure 1 and Figure 2 As shown, the heat pump device 10 of the embodiment of the present invention includes a housing 100, a heat pump assembly 200 and a fan 300. The housing 100 has an inner cavity, and the heat pump assembly 200 and the fan 300 are installed in the inner cavity; the front side of the housing 100 is provided with an opening 103 and a panel (not shown in the drawings), the opening 103 is connected to the inner cavity, and the panel is detachably installed at the opening 103, the opening 103 is located on the front side of the housing 100, and the opening 103 can be opened or closed by the panel. In some embodiments, the panel and the housing 100 can be connected by structures such as buckles, screws or locks, and can also be rotatably connected to the housing 100 by hinges, hinges and other articulated structures.

[0030] The heat pump assembly 200 includes a compressor 210, a first heat exchanger 220, a second heat exchanger 230 and a throttling component. The first heat exchanger 220 is arranged in the middle of the inner cavity of the box 100 and is arranged vertically along the height direction of the box 100. The inner cavity of the box 100 is divided into an air inlet cavity 101 and an air outlet cavity 102 by the first heat exchanger 220. The air inlet cavity 101 is located on the right side of the first heat exchanger 220, and the air outlet cavity 102 is located on the left side of the first heat exchanger 220. The compressor 210 and the second heat exchanger 230 are arranged in the air inlet cavity 101, and the fan 300 is arranged in the air outlet cavity 102.

[0031] In one embodiment, the first heat exchanger 220 is an evaporator 221, the second heat exchanger 230 is a plate heat exchanger 231, the evaporator 221 is provided with a first refrigerant pipeline 240, the plate heat exchanger 231 is provided with a second refrigerant pipeline 250 and a water pipeline 2311, the plate heat exchanger 231 is connected to the compressor 210 and the throttling component through the second refrigerant pipeline 250, and the evaporator 221 is connected to the compressor 210 and the throttling component through the first refrigerant pipeline 240, forming a refrigerant circulation loop for the circulation of the refrigerant.

[0032] Reference Figure 2 As shown, the heat pump device 10 also includes a pipeline assembly 500, which is installed in the air inlet chamber 101. The pipeline assembly 500 includes a water pump 510, a water inlet pipe 520 and a water outlet pipe 530. The water inlet pipe 520 and the water outlet pipe 530 are respectively connected to the water flow pipeline 2311. The water pump 510 can be set on the water inlet pipe 520 or the water outlet pipe 530 to form a water supply pipeline. When working, the refrigerant output by the compressor 210 passes through the plate heat exchanger 231, exchanges heat with water through the plate heat exchanger 231, and then enters the evaporator 221 after throttling. After exchanging heat with air through the evaporator 221, it returns to the compressor 210 to enter the next cycle, and the cold water is driven into the plate heat exchanger 231 by the water pump 510, so that the water and the refrigerant exchange heat, thereby producing hot water.

[0033] It should be noted that, refer to Figure 1 As shown, the top of the housing 100 is provided with an air inlet 131 and an air outlet 132, the air inlet 131 is connected to the air inlet chamber 101, the air inlet of the fan 300 is arranged toward the evaporator 221, and the air outlet of the fan 300 is connected to the air outlet 132. The air inlet 131 and the air outlet 132 are respectively provided with a duct connector 133, the air inlet 131 is connected to the air inlet duct through the duct connector 133, and the air outlet 132 is connected to the air outlet duct through the duct connector 133, and the air inlet duct and the air outlet duct are both connected to the outdoor environment, and the outdoor air enters the air inlet chamber 101 through the air inlet duct and the air inlet 131, the outdoor air exchanges heat with the evaporator 221, and enters the air outlet chamber 102, and then is discharged to the outdoor environment through the air outlet 132 and the air outlet duct. The air in the outdoor environment is used as a heat source, and heat is extracted through the heat exchange process, thereby achieving the heating of hot water. Figure 1 The directions indicated by the arrows are the directions of air inlet and air outlet.

[0034] It is understandable that the heat pump device 10 of the embodiment of the present invention can provide hot water through the water outlet pipe 530 for supplying domestic hot water and heating hot water, or the water outlet pipe 530 can be connected to a water tank to store hot water in the water tank for use by users. The water inlet of the water inlet pipe 520 and the water outlet of the water outlet pipe 530 are both arranged on the bottom plate 110 of the box body 100 to avoid the visible area located on the front or side affecting the appearance structure.

[0035] The heat pump equipment 10 is installed in an indoor environment, specifically in a basement, attic, garage, machine room, utility room and other scenes. The installation scenes are rich and there is no need to install it in an outdoor environment, thus eliminating the high installation cost, long installation time and high installation risk brought by the installation of an outdoor unit. The installation scene is not restricted by the aesthetics of the building's exterior surface, installation regulations and outdoor noise. The entire installation and maintenance process is performed indoors, with low installation and maintenance costs and simple operation. The shutdown process is not affected by the harsh outdoor environment, and there is no need to design a large amount of redundancy to prevent freezing of the water supply pipeline, thereby reducing production costs.

[0036] Reference Figure 1 and Figure 2 As shown, the heat pump device 10 of the embodiment also includes an electronic control box 400, which is used to electrically connect the compressor 210, the fan 300, the water pump 510, functional devices and other components. The functional devices include sensors, control valves and other components, and can also be connected to external devices of the heat pump device 10. For example, a switch valve can be set in the water tank, and the electronic control box 400 can lead out a line and extend it to the outside of the box body 100, so that the line is connected to the switch valve to realize the control of the switch valve.

[0037] The electric control box 400 is connected to the opening 103 of the case 100. Specifically, the electric control box 400 is rotatably connected to the case 100. For example, the electric control box 400 is connected to the case 100 by a hinged manner, so that the electric control box 400 can rotate around the hinged position to achieve the flipping of the electric control box 400. In this way, the electric control box 400 can rotate toward the air inlet chamber 101 and move into the air inlet chamber 101 from the opening 103, so that the electric control box 400 is stored in the case 100; it is also possible that when the electric control box 400 is located in the air inlet chamber 101, the electric control box 400 is flipped toward the outside of the case 100, so that the electric control box 400 moves out of the air inlet chamber 101 from the opening 103.

[0038] It can be understood that the electric control box 400 in the embodiment is roughly in the shape of a cuboid. Since the electric control box 400 is arranged at a position near the opening 103 of the air inlet cavity 101, the air inlet cavity 101 can be covered at the opening 103 by the electric control box 400. The compressor 210, the plate heat exchanger 231, the first refrigerant pipeline 240, the second refrigerant pipeline 250, the water inlet pipe 520, the water outlet pipe 530 and the water pump 510 are all arranged in the air inlet cavity 101. Figure 2As shown, in some embodiments, the compressor 210 is arranged near the back of the box body 100, the plate heat exchanger 231 is fixedly connected to the side wall of the box body 100, the water pump 510 is located below the plate heat exchanger 231, and the first refrigerant pipeline 240, the second refrigerant pipeline 250 and the water flow pipeline 2311 are arranged specifically according to the positions of the above-mentioned components. The above-mentioned components can be shielded by the electrical control box 400, and then the panel covers the opening 103, thereby shielding the internal structure of the box body 100.

[0039] Reference Figure 2 As shown, when the heat pump equipment 10 needs to be inspected and repaired, it is only necessary to open the panel and flip the electric control box 400 around the hinge position to move the electric control box 400 out of the air inlet chamber 101, and then the air inlet chamber 101 can be opened to expose the compressor 210, the second heat exchanger 230 and the pipe assembly 500, that is, the user can see the internal pipe assembly 500 and the refrigerant circulation loop on the front side of the box body 100, and it can be conveniently operated whether it is production or post-installation debugging and maintenance, and it is also convenient to replace parts without disassembling the electric control box 400; in addition, after the electric control box 400 is moved out of the air inlet chamber 101, it is also convenient to connect and repair the electric control box 400, and the operation is simple and quick, which effectively improves work efficiency.

[0040] Taking into account that the water supply pipeline is more prone to failure than the refrigerant pipeline, in one embodiment, the pipeline assembly 500 is arranged in the air inlet chamber 101 near the opening 103, that is, along the front and rear direction of the box body 100, the pipeline assembly 500 is arranged in front of the refrigerant pipeline and the compressor 210, which is more convenient for inspecting the pipeline assembly 500.

[0041] It should be noted that the fan 300 is located in the air outlet cavity 102, which is spaced apart from the air inlet cavity 101. After opening the panel, the fan 300 can be exposed, which is convenient for maintenance of the fan 300. In some embodiments, the fan 300 can be connected to the box 100 using a guide rail structure, which is convenient for moving the fan 300 out of the air outlet cavity 102 along the guide rail structure, and is more convenient for maintenance operations. The heat pump device 10 adopts the layout structure of the above embodiment, which has small space requirements and does not require a large amount of installation and maintenance space on both sides of the fuselage. All maintenance can be completed on the front side of the box 100, which is convenient for operation.

[0042] Reference Figure 1 and Figure 2 As shown, the box body 100 includes a chassis 110, a side panel 120, a top cover 130 and a panel, the side panel 120 defines an opening 103, the chassis 110 and the top cover 130 are respectively connected to the upper and lower ends of the side panel 120, and an inner cavity can be defined by the chassis 110, the side panel 120, the top cover 130 and the panel, and the air inlet 131 and the air outlet 132 are both arranged on the top cover 130.

[0043] Reference Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the electric control box 400 is rotatably connected to the side panel 120 through a hinge structure 600, and the hinge position is located on the right side of the opening 103, and the electric control box 400 can be flipped toward the right side to move out of the air inlet chamber 101. Among them, the hinge structure 600 can be a hinge, a hinge, etc. Taking a hinge as an example, two hinges can be respectively connected to the two ends of the electric control box 400 along the height direction, and the two hinges are connected to the side panel 120, so that the electric control box 400 can be flipped.

[0044] Of course, the electrical control box 400 is not limited to being hinged to the side panel 120, but can also be connected to the top cover 130 or the chassis 110 through the hinge structure 600. For example, the upper end of the electrical control box 400 is hinged to the top cover 130, and can be flipped upward to open the air inlet chamber 101; for another example, the lower end of the electrical control box 400 is hinged to the chassis 110, and can be flipped downward to open the air inlet chamber 101.

[0045] Reference Figure 3 and Figure 5 As shown, in some embodiments, the hinge structure 600 includes a first hinge 610 and a second hinge 620, the first hinge 610 is fixedly connected to the side of the electric control box 400, and the second hinge 620 is fixedly connected to the edge of the side panel 120, the first hinge 610 is provided with a shaft sleeve 611, and the shaft sleeve 611 is provided with an axis hole, and the second hinge 620 is provided with a hinge axis 621, and the hinge axis 621 is inserted into the axis hole, so that the first hinge 610 and the second hinge 620 can rotate relative to each other, thereby realizing the rotation of the electric control box 400 around the hinge axis 621.

[0046] by Figure 5 The example shown is used for illustration, because the shaft sleeve 611 and the hinge shaft 621 are connected in a sleeve manner, the shaft sleeve 611 can move upward to disengage from the hinge shaft 621, so that the first hinge 610 and the second hinge 620 are separated, and the electric control box 400 and the box body 100 are disassembled and separated, which facilitates the installation and disassembly of the electric control box 400. In some other embodiments, the hinge shaft 621 can be provided on the first hinge 610, and the shaft sleeve 611 can be provided on the second hinge 620, so that the first hinge 610 and the second hinge 620 can also be disassembled and separated.

[0047] Reference Figure 1 and Figure 4As shown, in order to fix the electric control box 400, in some embodiments, the right side of the electric control box 400 is connected to the side plate 120 through the above-mentioned hinge structure 600, and the left side of the electric control box 400 is provided with a lug 4221, and the lug 4221 is provided at the upper end of the electric control box 400. When the electric control box 400 is located in the air inlet cavity 101, it is connected to the top cover 130 through the lug 4221 to achieve the function of fixing the electric control box 400. Specifically, the lug 4221 and the top cover 130 are respectively provided with connecting holes 134, and the electric control box 400 is fixed by passing the bolts through the connecting holes 134 of the lug 4221 and the top cover 130, so as to prevent the electric control box 400 from swinging during use.

[0048] It is understandable that, since the hinge structure 600 supports and positions one side of the electric control box 400, only one bolt is needed to fix the electric control box 400 in the embodiment, thereby improving the maintenance efficiency. Of course, the lug 4221 is not limited to being connected to the top cover 130 by bolts. For example, the lug 4221 may be provided with a buckle, and the top cover 130 may be provided with a slot matching the buckle, so as to achieve rapid fixation by buckling.

[0049] In addition, when the electric control box 400 is close to the chassis 110, the lug 4221 can be set at the lower end of the electric control box 400, and the lug 4221 is connected to the chassis 110 by bolts or snap connections. The specific shape of the lug 4221 can be selected according to the actual requirements of the product to meet the requirements of connecting with the top cover 130 or the chassis 110.

[0050] Reference Figure 6 As shown, the electric control box 400 includes an electric control board 410, a box body 420 and a box cover 430. The box body 420 and the box cover 430 are connected to enclose and form an installation cavity. The electric control board 410 is arranged in the installation cavity and connected to the box body 420. The box body 420 plays a role in fixing the electric control board 410. The electric control board 410 is wrapped by the box body 420 and the box cover 430 to protect the electric control board 410. In some embodiments, a sealing member is provided between the box body 420 and the box cover 430, so as to improve the overall sealing performance of the electric control box 400 and improve the reliability.

[0051] Among them, the electric control board 410 is provided with electric control elements and wiring terminals 412, which are distributed on the side of the electric control box 400 facing the box cover 430, and the wiring terminals 412 are electrically connected to the compressor 210, the fan 300, the water pump 510, the sensor, the control valve and other components through the wire 460. In the embodiment, when the electric control box 400 is moved into the box body 100, the box cover 430 faces the air inlet cavity 101, and when the electric control box 400 is moved out of the box body 100, the box cover 430 can face the front of the box body 100, and after opening the box cover 430, it is convenient to connect and repair the electric control board 410. Therefore, in the embodiment, the hinge structure 600 is connected to the box body 420, and after the electric control box 400 is flipped and moved out of the box body 100, the connection between the box body 420 and the box body 100 can be maintained when the box cover 430 is opened, which is convenient for wiring and maintenance operations.

[0052] In some embodiments, the box cover 430 can be connected to the box body 420 by snapping, so as to facilitate opening the box cover 430. In other embodiments, the box cover 430 can also be connected by bolts or other methods.

[0053] Reference Figure 6 As shown, the box body 420 includes a back plate 421 and a first shell 422. The back plate 421 is connected to the electric control board 410. Specifically, the electric control board 410 can be fixed to the back plate 421 by buckles or screws. The first shell 422 covers the side of the back plate 421 away from the electric control board 410. The box cover 430 includes a cover plate 431 and a second shell 432. The cover plate 431 is connected to the back plate 421. The installation cavity is formed between the cover plate 431 and the back plate 421. The second shell 432 Covering the side of the cover plate 431 away from the electric control board 410; wherein, the first shell 422 and the second shell 432 are both metal shells, the back plate 421 and the cover plate 431 are both insulating parts, the first shell 422 is used to protect the back plate 421, and the second shell 432 is used to protect the cover plate 431, the cover plate 431 and the back plate 421 form an inner plastic shell, and the first shell 422 and the second shell 432 form an outer metal shell, which effectively protects the electric control board 410.

[0054] It should be noted that the outer metal shell can provide support for the entire electric control box 400. In one embodiment, the first hinge 610 is connected to the first shell 422, and the connection structure has higher strength, ensuring that the connection between the electric control box 400 and the box body 100 is more reliable. After flipping the electric control box 400 out of the box body 100, the box cover 430 can be opened, which is easy to operate.

[0055] Since the electric control element of the electric control board 410 includes a first heating device, the first heating device may be a rectifier bridge, an intelligent power module, an insulated gate bipolar transistor, etc., the electric control board 410 in the embodiment is further provided with a heat sink 440, which is arranged on the side of the electric control board 410 facing the box cover 430 and abuts against the heating surface of the first heating device. The heat of the first heating device can be taken away by the heat sink 440. The heat sink 440 may be a fin heat sink. The heat sink 440 may also be in contact with two or more first heating devices at the same time for heat dissipation. For example, the rectifier bridge and the intelligent power module are arranged adjacent to each other, and the heat sink 440 is in contact with the heating surfaces of the rectifier bridge and the intelligent power module, so that the rectifier bridge and the intelligent power module can be cooled at the same time.

[0056] Reference Figure 6 As shown, the box cover 430 is provided with a through hole 4301, and the size of the through hole 4301 matches the size of the radiator 440, so that the radiator 440 can pass through the through hole 4301, and at least part of the radiator 440 is exposed outside the box cover 430. Since the box cover 430 includes a cover plate 431 and a second shell 432, in the embodiment, the cover plate 431 and the second shell 432 are both provided with the through hole 4301, and the radiator 440 can pass through the cover plate 431 and the second shell 432 at the same time.

[0057] Reference Figure 7 and Fig. 9 As shown, in some embodiments, a sealing ring 441 is provided between the radiator 440 and the box cover 430, a part of the structure of the radiator 440 is exposed from the through hole 4301, a flange is provided on the outer peripheral edge of the radiator 440 on the side facing the electric control board 410, the sealing ring 441 is arranged around the radiator 440 and one side thereof abuts against the flange, when the box cover 430 and the box body 420 are assembled, the box cover 430 abuts against the other side of the sealing ring 441 and presses the sealing ring 441, thereby fixing the sealing ring 441, making the radiator 440 and the box cover 430 have a higher sealing performance, thereby improving the overall sealing performance of the electric control box 400.

[0058] It is understandable that when the electric control box 400 is located in the air inlet cavity 101, the box cover 430 and the radiator 440 are both facing the air inlet cavity 101, and the side of the box body 420 facing away from the electric control board 410 is facing the front of the box body 100. When the heat pump device 10 is working, the air from the outdoor environment will enter the air inlet cavity 101 and flow along the air inlet cavity 101 to the evaporator 221, and part of the air flow will pass through the radiator 440, thereby helping to improve the heat dissipation efficiency of the radiator 440.

[0059] In some embodiments, reference Figure 2 and Figure 3As shown, the radiator 440 is arranged at the upper end of the electric control box 400, and after the electric control box 400 enters the air inlet cavity 101, the radiator 440 is arranged close to the air inlet 131, which is more conducive to the airflow passing through the radiator 440, and the heat dissipation effect is better. It should be noted that the airflow takes away the heat of the radiator 440 and then exchanges heat with the evaporator 221, which can recover the heat taken away by the airflow and improve the heating efficiency.

[0060] The embodiment of the present invention arranges the electric control elements, the wiring terminals 412 and the heat sink 440 on the side of the electric control board 410 facing the box cover 430, which can facilitate the heat dissipation of the heat sink 440 on the one hand and the wiring of the wiring terminals 412 on the other hand, while ensuring that the wiring and the heat sink 440 are located on the same side of the electric control board 410, without the need for special production processes, and is easy to produce.

[0061] In addition, a terminal block 450 is provided in the electric control box 400. The terminal block 450 is used to connect external power lines, signal lines, temperature sensing lines and other lines. The above lines are transferred to the electric control board 410 through the terminal block 450. The terminal block 450 is arranged below the electric control board 410. Some terminal blocks 412 of the electric control board 410 are electrically connected to the terminal block 450 through internal transfer lines.

[0062] Specific as Figure 3 As shown, the electric control box 400 is flipped toward the outside of the box body 100 and the box cover 430 is opened. The wiring terminals 412 of the electric control board 410 and the wiring leads from the wiring socket 450 are on the same side. The signal line, power line, temperature sensing package line, etc. are all connected to the inside of the electric control box 400 from the bottom area of ​​the electric control box 400 and plugged into the corresponding wiring socket 450 or the wiring terminal 412.

[0063] It should be noted that the electric control element further includes a second heating device 411, which is a device with a non-encapsulated structure. It generates heat when working and needs to be provided with waterproof protection measures. Therefore, in some embodiments, the second heating device 411 is arranged in the electric control box 400, and an air duct 401 is arranged on the electric control box 400 to dissipate heat from the second heating device 411. The second heating device 411 can be an inductor 4111 or other heating devices.

[0064] Taking the inductor 4111 as an example, the inductor 4111 is arranged on the side of the electric control box 400 facing the box cover 430, and the air duct 401 is formed on the box cover 430. The box cover 430 is provided with an air inlet 402 and an air outlet 403, and the air inlet 402 and the air outlet 403 are respectively connected to the air duct 401, wherein the air inlet 402 is arranged toward the radiator 440, and the air outlet 403 is arranged on the side wall of the box cover 430. When the electric control box 400 is flipped over and enters the air inlet chamber 101, the air outlet 403 faces the evaporator 221, and at least part of the structure of the inductor 4111 is located in the air duct 401.

[0065] When the heat pump device 10 is working, the air from the outdoor environment will enter the air inlet chamber 101, and flow toward the evaporator 221 along the air inlet chamber 101. After passing through the radiator 440, part of the air flow enters the air duct 401 through the air inlet 402, and flows toward the inductor 4111 along the air duct 401, and then is discharged from the air outlet 403. It should be noted that, since the evaporator 221 is close to the air outlet 403 of the air duct 401, when the air flow in the air inlet chamber 101 passes through the evaporator 221, the air flow velocity discharged from the air outlet 403 will be accelerated, resulting in a suction effect, so the air flow of the inductor 4111 can be improved through the air duct 401. Moreover, since the air inlet 402 faces the radiator 440, the wind speed passing through the radiator 440 can be accelerated at the same time, which is conducive to improving the heat dissipation efficiency of the radiator 440.

[0066] Reference Figure 7 As shown, the air duct 401 is formed on the box cover 430. Specifically, the cover plate 431 is made of plastic. A groove 4312 is provided on the side of the cover plate 431 away from the electric control board 410. The groove 4312 can be formed by integral injection molding. Among them, a convex portion 4311 is provided on the side of the cover plate 431 away from the electric control board 410. A through hole 4301 is provided on the upper end of the cover plate 431. The convex portion 4311 is arranged adjacent to the through hole 4301. The convex portion 4311 is roughly square. An air inlet 402 is formed on the upper surface of the convex portion 4311. An air outlet 403 is formed on the right side of the convex portion 4311. The groove 4312 is formed on the surface of the convex portion 4311 facing away from the box body 420.

[0067] When the second housing 432 covers the cover plate 431, the air duct 401 is defined between the second housing 432 and the groove 4312. The second housing 432 is recessed on one side of the cover plate 431 to form a cover body 4321 matching the convex portion 4311, so that the second housing 432 can be covered on the cover plate 431. In addition, the second housing 432 is provided with openings 4322 corresponding to the air inlet 402 and the air outlet 403, so that the air duct 401 is formed on the box cover 430.

[0068] Reference Figure 8 and Fig. 9As shown, it should be noted that a through slot is provided on the side of the cover plate 431 facing the electric control board 410, and the through slot is located on the bottom wall of the groove 4312. When the cover plate 431 covers the electric control board 410, the inductor 4111 can extend into the air duct 401 through the through slot, so that part of the structure of the inductor 4111 is located in the air duct 401.

[0069] The radiator 440 and the air duct 401 are arranged in sequence from top to bottom along the height direction of the electric control box 400, and the air inlet 402 of the air duct 401 is arranged toward the radiator 440, that is, the air inlet 402 is arranged upward, and the air flow enters the air duct 401 from top to bottom. Considering that the electric control box 400 is close to the water supply pipeline, and there is a situation where rainwater enters the air inlet cavity 101 through the air inlet 131.

[0070] Therefore, in some embodiments, reference Fig. 9 and Fig.10 As shown, the box cover 430 is provided with a first baffle 4313 and a second baffle 4314. The first baffle 4313 is arranged horizontally on one side of the air outlet 403, and the second baffle 4314 is located in the air duct 401 and is staggered with the first baffle 4313 in the up-down direction to form an air guide channel 4011 in the air duct 401. It can be understood that since the air inlet 402 is arranged upward, by staggeredly arranging the first baffle 4313 and the second baffle 4314 at the air inlet 402, as shown in FIG. Fig.10 As shown, the air guide channel 4011 is located between the air inlet 402 and the inductor 4111, and the first baffle 4313, the second baffle 4314 and the inductor 4111 are arranged in sequence from top to bottom. The first baffle 4313 covers a portion of the air inlet 402. The air guide channel 4011 extends downward from the air inlet 402, bends at the second baffle 4314 and extends toward the direction of the electronic control board 410, and then bends downward again. In other words, the air guide channel 4011 has a bending section, which can prevent the airflow from directly entering the air duct 401 from top to bottom, thereby preventing water from entering the air duct 401.

[0071] Reference Fig.10 As shown in the figure, the arrow line P3 shows the direction of the airflow along the air guide channel 4011. It can be understood that when rainwater enters the air guide channel 4011 from the air inlet 402 along with the airflow, the rainwater will fall downward onto the second baffle 4314 due to gravity, and the airflow will continue to flow along the air guide channel 4011, thereby separating the airflow and water, and effectively reducing the risk of rainwater contacting the inductor 4111. In this way, the air duct 401 can not only dissipate heat for the inductor 4111, but also has a waterproof effect, thereby improving the protection performance.

[0072] In one embodiment, the first baffle 4313 and the second baffle 4314 are both disposed on the cover plate 431 and are integrally formed with the cover plate 431, and the structure is firm and reliable. In order to achieve a better drainage effect, the second baffle 4314 is tilted downward in a direction away from the inductor 4111, that is, a downwardly tilted slope is formed, so that when rainwater falls on the second baffle 4314, it can slide down the slope to prevent the rainwater from flowing toward the inductor 4111.

[0073] It is understandable that, referring to Fig.10 As shown, in one embodiment, the second baffle 4314 may include a first plate 4314a and a second plate 4314b, the first plate 4314a and the first baffle 4313 are arranged alternately, the first plate 4314a is arranged to be tilted downward, the second plate 4314b is connected to one end of the first plate 4314a away from the first baffle 4313, and the second plate 4314b is extended downward along the air duct 401. Specifically, the second baffle 4314 is arranged opposite to the inductor 4111. In the direction perpendicular to the box cover 430 toward the box body 420, the projections of the first plate 4314a and the second plate 4314b cover the projection of the inductor 4111, so that after rainwater falls on the first plate 4314a, it flows obliquely downward along the first plate 4314a, and then falls downward along the second plate 4314b, thereby preventing the rainwater discharged along the second baffle 4314 from contacting the inductor 4111, thereby further improving the waterproof effect.

[0074] Reference Figure 7 As shown, it can be understood that the second baffle 4314 is located in the air duct 401 and is arranged opposite to the through slot. Along the direction of the cover plate 431 toward the electric control board 410, the second baffle 4314 can effectively block the inductor 4111 passing through the through slot. It can also be understood that the second baffle 4314 can block the through slot, and the second baffle 4314 is combined with the structure of the air guide channel 4011 to effectively separate the airflow and water. The specific height of the second baffle 4314 can be set according to the size of the inductor 4111 to ensure that the second baffle 4314 can effectively block the inductor 4111.

[0075] It should be noted that when the second shell 432 covers the cover plate 431, a gap may be formed between the inner wall of the second shell 432 and the second baffle 4314, so that water can be discharged downward along the gap. Fig. 9 As shown, Fig. 9 The direction indicated by the arrow line P1 inside the middle air channel 401 is the drainage direction of the water flow.

[0076] In some embodiments, the second baffle 4314 is not limited to being set on the cover 431, and the second baffle 4314 can also be set on the side wall of the second shell 432 facing the cover 431. For example, the second baffle 4314 is added to the inner wall of the cover body 4321, and a drain outlet is formed between the second baffle 4314 and the inner wall of the cover body 4321.

[0077] Reference Fig. 9 As shown, considering that the airflow of the air inlet cavity 101 will blow toward the electric control box 400, Fig. 9 The direction indicated by the arrow line P2 outside the middle electric control box 400 is the direction of the external airflow. Therefore, in the embodiment of the present invention, a third baffle 4323 is added to the cover plate 431, and the third baffle 4323 is arranged close to the air inlet 402. The third baffle 4323 blocks the airflow blowing from the side to the electric control box 400, further reducing the risk of rainwater entering the air duct 401.

[0078] Reference Fig.10 As shown, specifically, the third baffle 4323 is formed on the second shell body 432 and is located at the top position of the cover body 4321. Along the direction from the box cover 430 to the box body 420, the third baffle 4323 and the first baffle 4313 are arranged in sequence on the opposite sides of the air inlet 402, and the third baffle 4323 is extended upward to be higher than the air outlet 403 and the first baffle 4313. In this way, the third baffle 4323 can effectively block the airflow blowing from the side toward the electric control box 400 from directly entering the air duct 401, thereby reducing rainwater entering the air duct 401.

[0079] Therefore, in one embodiment, the box cover 430 blocks the airflow multiple times by providing the first baffle 4313, the second baffle 4314 and the third baffle 4323, thereby changing the flow direction, which can be beneficial to separate rainwater from the airflow, and greatly reduce the risk of rainwater contacting the inductor 4111. In the embodiment, the third baffle 4323 and the second housing 432 can be an integrally formed structure, which is easy to manufacture. The specific size of the third baffle 4323 can be set according to the size of the air inlet 402, so as to meet the requirements of being able to block the air inlet 402 along the direction of the box cover 430 toward the electric control board 410, thereby effectively blocking rainwater.

[0080] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A heat pump device, characterized in that: include: A box body, one side of which is provided with an opening and a panel detachably covering the opening; A heat pump assembly, comprising a compressor, a first heat exchanger and a second heat exchanger, wherein the first heat exchanger is arranged in the box body and divides the inner cavity of the box body into an air inlet cavity and an air outlet cavity, the compressor and the second heat exchanger are arranged in the air inlet cavity, the second heat exchanger comprises a refrigerant pipeline and a water flow pipeline, and the refrigerant pipeline, the compressor, the first heat exchanger and the second heat exchanger are connected to form a refrigerant circulation loop; A fan is arranged in the air outlet cavity; A pipeline assembly is arranged in the air inlet cavity, and the pipeline assembly includes a water pump, a water inlet pipe and a water outlet pipe connected to the water flow pipeline; An electric control box is arranged in the air inlet cavity and close to the opening. The electric control box is rotatably connected to the casing. The electric control box can be flipped and moved into the air inlet cavity from the opening, or moved out of the air inlet cavity from the opening to reveal the compressor, the second heat exchanger and the pipeline assembly.

2. The heat pump device according to claim 1, characterized in that: The box body comprises a bottom plate, a side plate, a top cover and the panel, the side plate surrounds and defines the opening, and the bottom plate and the top cover are respectively connected to two ends of the side plate; The heat pump device further comprises a hinge structure, and the electric control box is rotatably connected to one of the chassis, the side plate and the top cover via the hinge structure.

3. The heat pump device according to claim 2, characterized in that: The electric control box is arranged along the height direction of the box body, one side of the electric control box is rotatably connected to the side plate through the hinge structure, and the other side of the electric control box away from the hinge structure is provided with a lug, and the lug is detachably connected to the top cover or the chassis.

4. The heat pump device according to claim 2 or 3, characterized in that: The hinge structure includes a first hinge and a second hinge which are detachably connected. The first hinge is fixed to the electric control box, and the second hinge is fixed to the box body. One of the first hinge and the second hinge is provided with an axial hole, and the other is provided with a hinge shaft rotatably connected to the axial hole.

5. The heat pump device according to claim 1, characterized in that: The electric control box comprises an electric control board, a box body and a box cover, wherein the box body and the box cover enclose an installation cavity, and the electric control board is arranged in the installation cavity and connected to the box body; The outer surface of the box body is provided with a metal shell, and the first hinge is fixedly connected to the metal shell.

6. The heat pump device according to claim 1, characterized in that: The electric control box comprises an electric control board, a box body and a box cover, wherein the box body and the box cover enclose an installation cavity, and the electric control board is arranged in the installation cavity and connected to the box body; An electric control element and a heat sink are provided on one side of the electric control board facing the box cover, wherein the electric control element includes a first heating element, and the heat sink is connected to the electric control board and abuts against the heating surface of the first heating element; The box cover is provided with a through hole, the radiator passes through the through hole and is at least partially exposed outside the box cover, and when the electric control box is located inside the air inlet cavity, the box cover is arranged toward the air inlet cavity.

7. The heat pump device according to claim 6, characterized in that: The electric control element further comprises a second heating device, the box cover is provided with an air duct, and the second heating device is at least partially located in the air duct; The air inlet of the air duct is arranged toward the radiator, and the air outlet of the air duct is located at one side of the electric control box and is arranged toward the first heat exchanger when the electric control box is located inside the air inlet cavity.

8. The heat pump device according to claim 7, characterized in that: The radiator and the air duct are arranged in sequence from top to bottom along the height direction of the electric control box, the box cover is provided with a first baffle and a second baffle, the first baffle is arranged at the air outlet in the horizontal direction, the second baffle is located in the air duct and is staggered with the first baffle in the up-down direction to form an air guide channel in the air duct, and the air guide channel is located between the air inlet and the second heating device; At least a portion of the second baffle is tilted downward in a direction away from the second heat generating device.

9. The heat pump device according to claim 8, characterized in that: One end of the second baffle away from the first baffle extends downward along the air duct and is arranged opposite to the second heating device. Along the direction perpendicular to the box cover toward the box body, the projection of the second baffle covers the projection of the second heating device.

10. The heat pump device according to claim 8, characterized in that: A convex portion is provided on one side of the box cover away from the electric control board, the convex portion is arranged adjacent to the radiator and is located below the radiator, the air duct is formed in the convex portion, and the air inlet is formed on the side of the convex portion facing the radiator; The box cover is further provided with a third baffle extending upwards, and along the direction from the box cover toward the box body, the third baffle and the first baffle are sequentially arranged on two opposite sides of the air inlet.

11. The heat pump device according to claim 8, characterized in that: The box body comprises a back plate and a first shell, the back plate is connected to the electric control board, and the first shell covers a side of the back plate away from the electric control board; The box cover comprises a cover plate and a second shell, the cover plate is connected to the back plate to define the installation cavity, and the second shell covers a side of the cover plate away from the electric control board; A groove is formed on the side of the cover plate away from the electric control board, and the second shell and the groove define the air duct; the back plate and the cover plate are both insulating parts, and the first shell and the second shell are both metal shells.

12. The heat pump device according to claim 11, characterized in that The air inlet is opened in the second shell, and the first baffle plate and the second baffle plate are arranged on the cover plate and are an integrally formed structure with the cover plate.

13. The heat pump device according to claim 6, characterized in that: The electric control board is also provided with a plurality of connection terminals, and the plurality of connection terminals are arranged on a side of the electric control board facing the box cover; The heat pump device also includes a functional device arranged in the air inlet chamber, the functional device includes at least one of a sensor and a control valve, and the plurality of wiring terminals are electrically connected to the functional device, the compressor and the fan through wires.

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