Heat pump unit

Abstract

The heat pump unit comprises a machine shell, a frequency conversion plate assembly and a heat exchange assembly, the machine shell is provided with a first sub-cavity, a second sub-cavity and an air channel, the first sub-cavity and the second sub-cavity can be communicated with the external environment through the air channel, the frequency conversion plate assembly comprises a frequency conversion plate and cooling fins, the frequency conversion plate is located in the first sub-cavity, and the cooling fins are located in the second sub-cavity. The cooling fins are connected with the frequency conversion plate and used for conducting heat exchange on the frequency conversion plate, the cooling fins extend out of the first sub-cavity and are located in the air duct, the heat exchange assembly comprises a fin type heat exchanger and a compressor, the fin type heat exchanger is located in the second sub-cavity, and the compressor is located in the first sub-cavity. According to the technical scheme, heat dissipation of the frequency conversion plate is facilitated, and heat exchange efficiency of the frequency conversion plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pump units, in particular to a heat pump unit. Background Art

[0002] The inverter board in the heat pump unit is usually installed in the electrical box, and the heat dissipation fins of the electrical box and the inverter board extend from the electrical box to the fan cavity, that is, the air inlet side of the fan. However, since the inverter board heat dissipation fins are close to the fin heat exchanger of the heat pump unit, the fin heat exchanger temperature is relatively high, which may reduce the heat exchange effect of the inverter board heat dissipation fins. Utility Model Content

[0003] The embodiment of the utility model provides a heat pump unit, which can facilitate the heat dissipation of the frequency conversion board and is beneficial to improving the heat exchange efficiency of the frequency conversion board.

[0004] An embodiment of the utility model provides a heat pump unit, which includes: a casing, a frequency conversion board assembly and a heat exchange assembly, the casing has a first sub-cavity, a second sub-cavity and an air duct, the air duct can connect the first sub-cavity and the second sub-cavity with the external environment, the frequency conversion board assembly includes a frequency conversion board and a heat sink, the frequency conversion board is located in the first sub-cavity, the heat sink is connected to the frequency conversion board and is used for heat exchange of the frequency conversion board, the heat sink extends from the first sub-cavity and is located in the air duct, the heat exchange assembly includes a fin heat exchanger and a compressor, the fin heat exchanger is located in the second sub-cavity, and the compressor is located in the first sub-cavity.

[0005] The technical solution of the utility model is to arrange the frequency conversion board and the compression assembly in the first sub-cavity, so that the heat sink can extend from the first sub-cavity and be located in the air duct, and the finned heat exchanger is arranged in the second sub-cavity. The wind in the air duct can exchange heat with the heat sink, so as to avoid affecting the heat dissipation of the heat sink when the temperature of the finned heat exchanger is too high. While dissipating the heat of the finned heat exchanger, it is beneficial to improve the heat exchange efficiency of the frequency conversion board. In addition, the heat sink is located on the side of the air outlet, the cross-sectional area of ​​the side of the air outlet is small, the wind flow rate is high, and the convection heat exchange effect is better.

[0006] According to the aforementioned embodiment of the utility model, the casing further includes: a first front panel, the first front panel includes a first plate member, the first plate member is arranged in the first sub-cavity, the first plate member has an opening, and the heat sink extends from the opening and is located in the air duct.

[0007] According to the aforementioned embodiment of the utility model, the heat pump unit further includes an electrical box and a fan, and the electrical box and the fan are located in the second sub-chamber. The technical solution of the utility model arranges the frequency conversion board outside the electrical box to avoid the situation where the heat dissipation of the frequency conversion board is affected by the small space in the electrical box, many heating devices, and high air temperature, which is beneficial to the heat dissipation of the frequency conversion board and improves the heat exchange efficiency of the frequency conversion board.

[0008] According to the aforementioned embodiment of the utility model, the first front panel further includes a second plate member, which is disposed in the second sub-cavity and detachably connected to the first plate member, and the second plate member is provided with an air guide opening communicated with the air duct.

[0009] According to the aforementioned embodiment of the utility model, the casing further includes: a second front panel, the second front panel is located in front of the first front panel and is detachably connected to the first front panel, and the side of the second front panel facing the first sub-cavity includes an air guide plate.

[0010] According to the aforementioned embodiment of the utility model, the air guide plate includes at least two air guide surfaces, one of which can guide the airflow in the air duct to the heat sink. The technical solution of the utility model is to provide at least two air guide surfaces, which can guide the airflow in the air duct to the heat sink, which is beneficial to the heat dissipation of the frequency converter board and improve the heat exchange efficiency of the frequency converter board.

[0011] According to the aforementioned embodiment of the present invention, the second front panel further includes a plurality of air guide holes, and the plurality of air guide holes are located on opposite sides of the second front panel, wherein an air guide surface can guide the airflow in the air duct to the air guide holes.

[0012] According to the aforementioned embodiment of the utility model, the air guide plate includes three air guide surfaces, each of which is arranged at an angle relative to the horizontal plane. The technical solution of the utility model is conducive to increasing the cross-sectional area of ​​the air duct and the amount of air flowing into the heat sink by arranging each air guide surface at an angle relative to the horizontal plane. While realizing heat dissipation for the fin-type heat exchanger, it is conducive to heat dissipation of the frequency converter board and improves the heat exchange efficiency of the frequency converter board.

[0013] According to the aforementioned embodiment of the utility model, the first sub-cavity and the second sub-cavity are separated. The technical solution of the utility model avoids the excessive temperature of the finned heat exchanger in the second sub-cavity affecting the heat dissipation of the heat sink by separating the first sub-cavity and the second sub-cavity, which is beneficial to improving the heat exchange efficiency of the frequency conversion board.

[0014] According to the above embodiments of the utility model, a waterproof part is provided at the opening. The utility model technical solution prevents liquid from flowing into the first sub-cavity by providing a waterproof part at the opening, which is beneficial to protecting the frequency conversion board and the electrical components in the first sub-cavity and extending the service life of the heat pump unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a heat pump unit of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of an embodiment of the heat pump unit of the utility model after the second front panel is removed;

[0018] Figure 3 This is a schematic diagram of the explosion structure of an embodiment of the heat pump unit of the utility model;

[0019] Figure 4 This is a schematic structural diagram of a second front panel of an embodiment of a heat pump unit of the utility model.

[0020] Description of Figure Numbers:

[0021] Casing - 100, frequency conversion board assembly - 200, heat exchange assembly - 300, fan - 400;

[0022] First sub-chamber 110, second sub-chamber 120, first front panel 130, second front panel 140, frequency conversion board 210, heat sink 220, fin heat exchanger 310, compressor 320;

[0023] A first plate 131, a second plate 132, an air guide plate 141, and an air guide hole 142;

[0024] Opening-1311, wind guide opening-1321, wind guide surface-1411.

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] The embodiment of the utility model provides a heat pump unit, which can facilitate the heat dissipation of the frequency conversion board and is beneficial to improving the heat exchange efficiency of the frequency conversion board.

[0030] like Figures 1 to 3 As shown, an embodiment of the utility model provides a heat pump unit, which includes: a casing 100, a frequency conversion board assembly 200 and a heat exchange assembly 300, the casing 100 has a first sub-cavity 110, a second sub-cavity 120 and an air duct, the air duct can connect the first sub-cavity 110 and the second sub-cavity 120 with the external environment, the frequency conversion board assembly 200 includes a frequency conversion board 210 and a heat sink 220, the frequency conversion board 210 is located in the first sub-cavity 110, the heat sink 220 is connected to the frequency conversion board 210 and is used to exchange heat for the frequency conversion board 210, the heat sink 220 extends from the first sub-cavity 110 and is located in the air duct, the heat exchange assembly 300 includes a finned heat exchanger 310 and a compressor 320, the finned heat exchanger 310 is located in the second sub-cavity 120, and the compressor 320 is located in the first sub-cavity 110.

[0031] In the heating process, the finned heat exchanger 310 is an evaporator, the fan rotates forward, and cold air flows into the heat sink 220 of the frequency conversion board assembly 200; in the cooling process, the finned heat exchanger 310 is a condenser, the fan rotates forward, and hot air flows into the heat sink 220 of the frequency conversion board assembly 200, which is not conducive to the heat dissipation of the frequency conversion board assembly 200. The technical solution of the utility model is to arrange the frequency conversion board 210 and the compression assembly in the first sub-chamber 110, the heat sink 220 can extend from the first sub-chamber 110 and be located in the air duct, and the finned heat exchanger 310 is arranged in the second sub-chamber 120, the wind in the air duct can exchange heat with the heat sink 220, and the frequency conversion board assembly 200 is arranged away from the finned heat exchanger 310 to avoid the temperature of the finned heat exchanger 310 being too high when the finned heat exchanger 310 is in the cooling state, thereby affecting the heat dissipation of the heat sink 220, and while dissipating the heat of the finned heat exchanger 310, it is beneficial to improve the heat exchange efficiency of the frequency conversion board 210. In addition, the heat sink 220 is located on the side of the air outlet, the cross-sectional area of ​​the side of the air outlet is small, the wind flow rate is high, and the convection heat exchange effect is better.

[0032] like Figures 2 to 3As shown, the housing 100 further includes: a first front panel 130, the first front panel 130 includes a first plate 131, the first plate 131 is disposed in the first sub-cavity 110, the first plate 131 has an opening 1311, and the heat sink 220 extends from the opening 1311 and is located in the air duct.

[0033] like Figures 2 to 3 As shown, the heat pump unit also includes an electrical box and a fan 400, and the electrical box and the fan 400 are located in the second sub-cavity 120. The technical solution of the utility model arranges the frequency conversion board assembly 200 outside the electrical box, the electrical box is arranged in the second sub-cavity 120, and the frequency conversion board assembly 200 is arranged in the first sub-cavity 110, so as to avoid the situation that the heat dissipation of the frequency conversion board 210 is affected by the small space in the electrical box, many heating devices, and high air temperature, which is beneficial to the heat dissipation of the frequency conversion board 210 and improves the heat exchange efficiency of the frequency conversion board 210.

[0034] like Figures 2 to 3 As shown, the first front panel 130 further includes a second plate 132 , which is disposed in the second sub-cavity 120 and detachably connected to the first plate 131 , and the second plate 132 is provided with an air guide opening 1311 communicating with the air duct.

[0035] like Figures 2 to 4 As shown, the housing 100 also includes: a second front panel 140, which is located in front of the first front panel 130 and is detachably connected to the first front panel 130. Preferably, the second front panel 140 and the first front panel 130 are detachably connected through matching buckles and slots.

[0036] The second front panel 140 includes an air guide plate 141 on one side facing the first sub-cavity 110. The air guide plate 141 includes at least two air guide surfaces 1411, one of which can guide the airflow in the air duct to the heat sink 220. The technical solution of the utility model is provided with at least two air guide surfaces 1411, and the air guide surface 1411 can guide the airflow in the air duct to the heat sink 220, which is beneficial to the heat dissipation of the frequency conversion board 210 and improves the heat exchange efficiency of the frequency conversion board 210. Preferably, as Figure 4 As shown, in one embodiment, the air guide plate 141 includes three air guide surfaces 1411, and each air guide surface 1411 is arranged obliquely relative to the horizontal plane. The technical solution of the utility model is conducive to increasing the cross-sectional area of ​​the air duct and the amount of air flowing into the heat sink 220 by obliquely arranging each air guide surface 1411 relative to the horizontal plane. While realizing heat dissipation for the fin-type heat exchanger 310, it is conducive to heat dissipation of the frequency conversion board 210 and improves the heat exchange efficiency of the frequency conversion board 210.

[0037] like Figure 1 to Figure 2As shown, the second front panel 140 further includes a plurality of air guide holes 142 , which are located on opposite sides of the second front panel 140 , wherein an air guide surface 1411 can guide the airflow in the air duct to the air guide holes 142 .

[0038] Preferably, in one embodiment, the first sub-cavity 110 and the second sub-cavity 120 are separated. The technical solution of the utility model separates the first sub-cavity 110 and the second sub-cavity 120 to avoid the excessive temperature of the finned heat exchanger 310 in the second sub-cavity 120 affecting the heat dissipation of the heat sink 220, which is beneficial to improving the heat exchange efficiency of the frequency conversion board 210.

[0039] Preferably, in one embodiment, a waterproof part is provided at the opening 1311. The technical solution of the utility model prevents liquid from flowing into the first sub-cavity 110 by providing a waterproof part at the opening 1311, which is beneficial to protecting the frequency conversion board 210 and the electrical components in the first sub-cavity 110, and is beneficial to extending the service life of the heat pump unit.

[0040] Next, how to control the heat dissipation of the frequency conversion board assembly 200 by the heat pump unit in an embodiment is described.

[0041] When the heat pump unit is working, first, the temperature of the frequency conversion board 210 in the frequency conversion board assembly 200 is detected. When the temperature of the frequency conversion board 210 is greater than 90°C, the heat pump unit is controlled to enter the heat dissipation protection program of the frequency conversion board 210. Then, in the heat dissipation protection program of the frequency conversion board 210, the fan 400 is controlled to run forward and run for one cycle at a preset low speed, and one cycle is 30 minutes. Then, the temperature of the frequency conversion board 210 is detected again. If the temperature of the frequency conversion board 210 is still greater than 90°C, the speed of the fan 400 is increased by 50 revolutions per minute, and one cycle is run for another 30 minutes. Repeat the above control and detection process until the temperature of the frequency conversion board 210 is detected to be less than 90°C. If the temperature of the frequency conversion board 210 is less than 90°C, the speed of the fan 400 is kept unchanged, but not exceeding the maximum refrigeration speed. It should be noted that the preset low speed and maximum cooling speed of the heat pump unit fan 400 can be adjusted according to factors such as the actual machine model and working conditions. In one embodiment, under the heating condition of 43°C, the speed of the fan 400 is approximately 500 rpm; under the low temperature condition, the speed of the fan 400 is approximately 700 rpm. Those skilled in the art can determine the values ​​of the low speed and maximum cooling speed of the fan 400 according to actual needs.

[0042] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A heat pump unit, characterized in that: The heat pump unit comprises: A housing, the housing having a first sub-cavity, a second sub-cavity and an air duct, the air duct being capable of connecting the first sub-cavity, the second sub-cavity and the external environment; A frequency conversion board assembly, the frequency conversion board assembly comprising a frequency conversion board and a heat sink, the frequency conversion board is located in the first sub-cavity, the heat sink is connected to the frequency conversion board and is used to exchange heat for the frequency conversion board, the heat sink extends from the first sub-cavity and is located in the air duct; and A heat exchange component, the heat exchange component includes a finned heat exchanger and a compressor, the finned heat exchanger is located in the second sub-cavity, and the compressor is located in the first sub-cavity.

2. The heat pump unit according to claim 1, characterized in that: The housing also includes: The first front panel comprises a first plate member, the first plate member is arranged in the first sub-cavity, the first plate member has an opening, and the heat sink extends from the opening and is located in the air duct.

3. The heat pump unit according to claim 2, characterized in that: The heat pump unit further includes an electrical box and a fan, and the electrical box and the fan are located in the second sub-cavity.

4. The heat pump unit according to claim 3, characterized in that: The first front panel also includes a second plate component, which is disposed in the second sub-cavity and is detachably connected to the first plate component, and the second plate component is provided with an air guide opening communicated with the air duct.

5. The heat pump unit according to claim 2, characterized in that: The housing also includes: The second front panel is located in front of the first front panel and is detachably connected to the first front panel. The second front panel includes an air guide plate on a side facing the first sub-cavity.

6. The heat pump unit according to claim 5, characterized in that: The air guide plate includes at least two air guide surfaces, one of which can guide the airflow in the air duct to the heat sink.

7. The heat pump unit according to claim 6, characterized in that: The second front panel further includes a plurality of air guide holes, and the plurality of air guide holes are located on two opposite sides of the second front panel, wherein one of the air guide surfaces can guide the airflow in the air duct to the air guide holes.

8. The heat pump unit according to claim 6, characterized in that: The wind guide plate includes three wind guide surfaces, and each of the wind guide surfaces is arranged inclined relative to a horizontal plane.

9. The heat pump unit according to claim 3, characterized in that: The first sub-cavity and the second sub-cavity are arranged separately.

10. The heat pump unit according to claim 2, characterized in that: A waterproof portion is arranged at the opening.

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