Electric appliance box and multi-split air conditioner

Abstract

The utility model discloses an electric appliance box and a multi-split air conditioner, the electric appliance box comprises a sealed housing, and the housing comprises a first mainboard used for placing a first component whose operation temperature is higher than a threshold temperature, and a second mainboard used for placing a second component whose operation temperature is higher than a threshold temperature; the second mainboard is used for placing a second component of which the operating temperature is lower than the threshold temperature; the refrigerant heat dissipation device is located between the first mainboard and the second mainboard, the side, facing the first mainboard, of the refrigerant heat dissipation device is provided with matched heat dissipation fins corresponding to the first components, and the other side, facing the second mainboard, of the refrigerant heat dissipation device is connected with the second mainboard. According to the refrigerant heat dissipation device, heat dissipated during operation of the first component is taken away through the heat dissipation fins, and heat dissipated during operation of the second component is taken away through the second mainboard, so that the heat dissipation effect of the electric appliance box is improved, the components in the electric appliance box are prevented from being damaged due to over-high temperature, and the service life of the electric appliance box is prolonged. The service life of the component is prolonged, and the after-sales demand is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, in particular to an electrical appliance box and a multi-split air conditioner. Background Art

[0002] The existing market for household multi-split air conditioners is broad, with a strong export market. Targeted for tropical regions near the equator, multi-split air conditioners operate in relatively high ambient temperatures. Cooling the electronic control components within the electrical enclosures of multi-split air conditioners has long been a challenge for the air conditioning industry. There are numerous market implementations of cooling these enclosures. Multi-split air conditioners in the industry generally utilize an integrated main control panel design, with the following common designs currently being used:

[0003] First, the electrical box is placed on the air outlet side of the fan, and heat dissipation holes are provided on the electrical box to achieve air cooling and heat dissipation, but the heat dissipation effect is poor.

[0004] Secondly, a refrigerant radiator installed on the electrical box dissipates heat from the box. This radiator includes a refrigerant coil, whose refrigerant inlet is connected to the refrigerant outlet of an outdoor heat exchanger. This utilizes circulating refrigerant to forcefully dissipate heat from the box. However, different manufacturers have different design concepts for the layout of electronic control components within the box, resulting in varying heat dissipation effects.

[0005] Therefore, how to provide an electrical box with a reasonable layout of electronic control components and good heat dissipation effect is an urgent problem to be solved. Utility Model Content

[0006] The utility model provides an electrical appliance box and a multi-split air conditioner, which are used to solve the problems of unreasonable layout of electric control elements in the electrical appliance box and poor heat dissipation effect in the prior art.

[0007] The technical solution of the utility model is an electrical appliance box, comprising a sealed housing, wherein the housing includes:

[0008] a first mainboard, the first mainboard being used to place first components whose operating temperature is higher than a threshold temperature;

[0009] a second mainboard, the second mainboard being used for placing second components whose operating temperature is lower than a threshold temperature;

[0010] A refrigerant heat dissipation device is located between the first main board and the second main board, and the refrigerant heat dissipation device faces one side of the first main board and is provided with matching heat dissipation ribs corresponding to each of the first components, and the refrigerant heat dissipation device faces the other side of the second main board and is connected to the second main board.

[0011] Furthermore, the refrigerant heat dissipation device includes a temperature averaging plate and a refrigerant heat dissipation pipe located in the temperature averaging plate;

[0012] The temperature vapor chamber is provided with a matching heat dissipation rib corresponding to each of the first components on one side facing the first main board, and is connected to the second main board on the other side facing the second main board.

[0013] Furthermore, the temperature equalization plates are placed normally relative to the first main board and the second main board.

[0014] Furthermore, the distance L between the first main board and the second main board has a value range of D<L<D;

[0015] Wherein, D is the thickness of the temperature homogenizing plate.

[0016] Furthermore, the temperature homogenizing plate is provided with a plurality of wire through holes, and the wire through holes are used to pass wires to electrically connect the first mainboard and the second mainboard.

[0017] Furthermore, the first component on the first mainboard and the second component on the second mainboard are both close to the refrigerant heat dissipation device and are arranged along the length direction of the refrigerant heat dissipation device.

[0018] The utility model also provides a multi-split air conditioner, comprising an outdoor unit, wherein the outdoor unit comprises the electrical appliance box described above.

[0019] Furthermore, the outdoor unit further comprises a housing, wherein a fan cavity for accommodating a fan and a compressor cavity for accommodating a compressor are provided in the housing;

[0020] An electrical box is provided on the inner top of the housing, and the first main board is arranged corresponding to the fan cavity, and the second main board is arranged corresponding to the compressor cavity.

[0021] Furthermore, the electrical box is placed upside down on the inner top of the shell.

[0022] Furthermore, a buffer member is tightly attached between the inner top wall of the shell and the electrical box.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] The refrigerant heat dissipation device of the utility model is arranged between the first main board and the second main board, and the first main board is placed with a first component whose operating temperature is higher than the threshold temperature; the second main board is placed with a second component whose operating temperature is lower than the threshold temperature, and then the refrigerant heat dissipation device takes away the heat emitted by the first component during operation through the heat dissipation ribs, and at the same time, the refrigerant heat dissipation device takes away the heat emitted by the second component during operation through the second main board, thereby improving the heat dissipation effect of the electrical box, avoiding damage to the components in the electrical box due to excessive temperature, extending the life of the components, and reducing after-sales requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains; the terms used in the specification of the application are intended only to describe specific embodiments and are not intended to limit this invention; the terms "including" and "having," as well as any variations thereof, in the specification and claims of this invention and the accompanying drawings are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the specification and claims of this invention and the accompanying drawings are used to distinguish between different objects, not to describe a specific order.

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of the internal structure of the electrical box proposed by the utility model;

[0028] Figure 2 This is another schematic diagram of the internal structure of the electrical box proposed by the present invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of the indoor unit proposed in this utility model.

[0030] Reference numerals:

[0031] 10. Housing;

[0032] 11. First mainboard; 111. High-power components;

[0033] 12. Second mainboard; 121. Low-power components;

[0034] 13. Refrigerant heat dissipation device; 131. Heat dissipation ribs; 132. Temperature equalization plate; 1321. Wire through hole; 133. Refrigerant heat dissipation pipe;

[0035] 14. Fixed plate;

[0036] 20. Shell;

[0037] 21. Fan cavity;

[0038] 22. Press chamber;

[0039] 23. Fan;

[0040] 24. Compressor;

[0041] 25. Isolation board. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although certain features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly stated. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0043] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0044] Example 1

[0045] The existing market for household multi-split air conditioners is broad, with strong export prospects. Targeted for tropical regions near the equator, multi-split air conditioners operate in relatively high ambient temperatures. Cooling the electronic control components within the electrical box within multi-split air conditioners has long been a challenge for the air conditioning industry. There are numerous market implementations of cooling the electrical box. Multi-split air conditioners in the industry generally utilize an integrated main control panel design. Commonly used designs include the following:

[0046] First, the electrical box is placed on the air outlet side of the fan, and heat dissipation holes are provided on the electrical box to achieve air cooling and heat dissipation, but the heat dissipation effect is poor.

[0047] Secondly, a refrigerant radiator installed on the electrical box dissipates heat from the box. This radiator includes a refrigerant coil, whose refrigerant inlet is connected to the refrigerant outlet of an outdoor heat exchanger. This utilizes circulating refrigerant to forcefully dissipate heat from the box. However, different manufacturers have different design concepts for the layout of electronic control components within the box, resulting in varying heat dissipation effects.

[0048] Therefore, in order to solve the above problems, refer to the attached Figure 1 The present invention provides an electrical box with a reasonable layout of electronic control elements (equivalent to components, the same as in the whole text) and good heat dissipation effect, which includes a sealed housing 10, and the housing 10 includes:

[0049] A first mainboard 11, the first mainboard 11 being used to place a first component 111 whose operating temperature is higher than a threshold temperature;

[0050] A second main board 12, the second main board 12 is used to place a second component 121 whose operating temperature is lower than a threshold temperature;

[0051] The refrigerant heat dissipation device 13 is located between the first main board 11 and the second main board 12, and the refrigerant heat dissipation device 13 is facing one side of the first main board 11 and corresponding to each first component 111. The refrigerant heat dissipation device 13 is connected to the second main board 12 on the other side facing the second main board 12.

[0052] Among them, a fixing plate 14 is provided at the bottom of the electrical box corresponding to the first main board 11 and the second main board 12 respectively, each fixing plate 14 is fixed to the bottom of the electrical box by bolts, and the first main board 11 and the second main board 12 are installed on the side of each fixing plate 14 facing away from the bottom of the electrical box respectively.

[0053] It should be noted that the first components 111 in this embodiment include capacitors, inductors and other components whose operating temperature is higher than the threshold temperature, which are not limited here; the second components 121 in this embodiment include rectifier bridges, IGBT modules, IPM modules (intelligent power modules) and other components whose operating temperature is lower than the threshold temperature, which are not limited here.

[0054] When the electrical box is running, the first component 111 in the running state will emit a large amount of heat, causing the operating temperature of the first component 111 to be higher than the threshold temperature; correspondingly, the second component 121 in the running state will emit a small amount of heat, causing the operating temperature of the second component 121 to be lower than the threshold temperature.

[0055] In this way, the first components 111 whose operating temperature is higher than the threshold temperature are all placed on the first main board 11, and the second components 121 whose operating temperature is lower than the threshold temperature are all placed on the second main board 12, and then the refrigerant heat dissipation device 13 is matched with a heat dissipation rib 131 corresponding to each first component 111. In this way, when the refrigerant in the refrigerant heat dissipation device 13 flows, the heat emitted by the first component 111 during operation will be taken away through the heat dissipation rib 131; at the same time, the heat emitted by the second component 121 can be transferred to the refrigerant heat dissipation device 13 through the second main board 12, and then taken away by the refrigerant flowing in the refrigerant heat dissipation device 13, thereby improving the heat dissipation effect of the electrical box, avoiding damage to the components in the electrical box due to excessive temperature, extending the life of the components, and reducing after-sales requirements.

[0056] In order to ensure that the refrigerant heat dissipation device 13 can promptly take away the heat emitted by the first component 111 during operation, thereby improving the heat dissipation effect of the electrical box, refer to the attached Figure 1-2 This embodiment proposes a structure of a refrigerant heat dissipation device 13:

[0057] The refrigerant heat dissipation device 13 includes a temperature averaging plate 132 and a refrigerant heat dissipation pipe 133 located in the temperature averaging plate 132 , and refrigerant flows in the refrigerant heat dissipation pipe 133 ;

[0058] The temperature averaging plate 132 faces one side of the first mainboard 11 and is provided with a matching heat dissipation rib 131 corresponding to each first component 111 . The temperature averaging plate 132 faces the other side of the second mainboard 12 and is connected to the second mainboard 12 .

[0059] It should be noted that the shapes of the first main board 11 and the second main board 12 in this embodiment are preferably rectangular. Of course, the shapes of the first main board 11 and the second main board 12 can also be square, circular or other shapes according to actual conditions, which are not limited here.

[0060] The temperature equalizing plates 132 are placed normally relative to the first main board 11 and the second main board 12 .

[0061] Among them, a temperature averaging plate 132 is provided at the bottom of the electrical box corresponding to the gap between the first main board 11 and the second main board 12, and the side of the temperature averaging plate 132 facing the first main board 11 is connected to the first main board 11 through the heat dissipation ribs 131, and the other side of the temperature averaging plate 132 facing the second main board 12 is directly connected to the second main board 12.

[0062] In this way, the normally placed temperature equalizing plate 132 can make full use of the space inside the electrical box, making the overall design of the electrical box more compact and reducing the space occupied by the electrical box; at the same time, the temperature equalizing plate 132 can also quickly and evenly disperse the heat transferred by the first component 111 of the first main board 11 and the second component 121 of the second main board 12 to the entire surface of the temperature equalizing plate 132, avoiding local overheating, thereby improving the overall heat dissipation effect; and through the uniform heat dissipation of the temperature equalizing plate 132, it can ensure that the temperature of the components on the first main board 11 and the second main board 12 is more balanced, reducing damage to components caused by local overheating.

[0063] To ensure that the temperature plate 132 can remove the heat emitted by the components on the first main board 11 and the second main board 12 more quickly and effectively, thereby further improving the heat dissipation effect, the distance L between the first main board 11 and the second main board 12 is in the range of D < L < 2D;

[0064] Wherein, D is the thickness of the temperature homogenizing plate 132 .

[0065] Among them, refer to the attached Figure 2 The temperature homogenizing plate 132 is provided with a plurality of wire through holes 1321 , and the wire through holes 1321 are used to pass wires to electrically connect the first main board 11 and the second main board 12 .

[0066] This ensures that signals, power and ground lines can be transmitted smoothly and stably between the first main board 11 and the second main board 12; and routing through the wire through-hole 1321 can shorten the routing length of the signal line, reduce signal delay and reflection, and improve signal integrity; and can better utilize the limited space in the electrical box, increase wiring density, and reduce the size of the first main board 11 and / or the second main board 12, so that the overall design of the electrical box is more compact, further reducing the space occupied by the electrical box.

[0067] In order to make the refrigerant heat dissipation device 13 better take away the heat emitted by the components on the first main board 11 and the second main board 12, so as to further improve the heat dissipation effect of the electrical box, refer to the attached Figure 1 This embodiment proposes a component layout structure on the first main board 11 and the second main board 12:

[0068] The first components 111 on the first main board 11 are all close to the refrigerant heat sink 13 and arranged along the length direction of the refrigerant heat sink 13, and the second components 121 on the second main board 12 are all close to the refrigerant heat sink 13 and arranged along the length direction of the refrigerant heat sink 13.

[0069] It should be noted that the shape of the electrical box in this embodiment is preferably a rectangular parallelepiped. Of course, the shape of the electrical box can also be a cube, a prism, or other suitable shapes according to actual conditions, which is not limited here.

[0070] Example 2

[0071] Refer to the attached Figure 3 The present invention also proposes a multi-split air conditioner, including an outdoor unit, wherein the outdoor unit includes the electrical box described above.

[0072] In this way, when the multi-split air conditioner is running, the outdoor unit and the electrical box also run accordingly, and the heat emitted by the high-power components on the first main board 11 will be transferred to the temperature equalizing plate 132 of the refrigerant heat dissipation device 13 through the heat dissipation ribs 131, and the heat emitted by the second component 121 on the second main board 12 will be transferred to the temperature equalizing plate 132 of the refrigerant heat dissipation device 13 through the second main board 12; at the same time, the main control MCU in the outdoor unit will start the refrigerant heat dissipation device 13 to make the refrigerant flow in the refrigerant heat dissipation pipe 133 of the refrigerant heat dissipation device 13, taking away the heat on the temperature equalizing plate 132, thereby improving the heat dissipation effect of the electrical box, avoiding damage to the components in the electrical box due to excessive temperature, extending the life of the components, and reducing after-sales requirements.

[0073] In order to make the electrical box also use the airflow generated by the fan 23 in the indoor unit for air cooling and heat dissipation, thereby further improving the heat dissipation effect of the electrical box, refer to the attached Figure 3 The outdoor unit further comprises a housing 20, wherein a fan chamber 21 for accommodating a fan 23 and a compressor chamber 22 for accommodating a compressor 24 are provided in the housing 20;

[0074] An electrical box is provided at the inner top of the housing 20 , and the first main board 11 is provided corresponding to the fan cavity 21 , and the second main board 12 is provided corresponding to the compressor cavity 22 .

[0075] The refrigerant inlet and outlet of the refrigerant heat dissipation pipe 133 are connected to the heat exchanger in the outdoor unit so that the refrigerant circulates between the refrigerant heat dissipation pipe 133 and the heat exchanger.

[0076] In this way, part of the heat emitted by the first component 111 on the first main board 11 and the second component 121 on the second main board 12 will be transferred to the shell 10 of the electrical box, thereby causing the temperature of the shell 10 to rise. At this time, the airflow generated by the fan 23 will pass through the shell 10 to take away the heat emitted by the electrical box, thereby further improving the heat dissipation effect of the electrical box.

[0077] It should be noted that the fan chamber 21 and the compressor chamber 22 are adjacent and separated by a partition plate 25. The electrical box is located on top of the fan and compressor chambers 21, 22. Specifically, the bottom wall of the electrical box contacts the top wall of the partition plate 25, while the side walls of the electrical box contact the corresponding side walls of the housing 10. Multiple bolts pass through the side walls of the housing 10 and connect to the side walls of the electrical box to secure the electrical box to the outdoor unit.

[0078] The first main board 11 in the electrical box extends out and is located at the top of the fan cavity 21, and the second main board 12 in the electrical box extends out and is located at the top of the press cavity 22. This can enable the first component 111 on the first main board 11 to obtain a better heat dissipation effect, thereby further avoiding damage to the components in the electrical box due to excessive temperature, extending the life of the components, and reducing after-sales requirements.

[0079] The electrical box is placed upside down on the inner top of the housing 20 .

[0080] In this way, the upside-down electrical box can effectively utilize the airflow in the fan cavity 21 for air cooling and heat dissipation, thereby improving the heat dissipation effect of the electrical box, avoiding damage to components in the electrical box due to excessive temperature, extending the life of the components, and reducing after-sales requirements.

[0081] In which, when the outdoor unit is being transported or installed, hard contact between the electrical box and the external structure (such as a metal casing, bracket, etc.) is avoided, thereby reducing vibration, noise and mechanical damage. A buffer part (not shown, the same applies to the entire text) is also tightly attached between the inner top wall of the casing 20 and the electrical box.

[0082] It should be noted that the material of the buffer component in this embodiment is preferably sponge. Of course, the material of the buffer component can also be rubber, silicone, felt and other high temperature resistant and vibration-damping materials according to actual conditions, which is not limited here.

[0083] Obviously, the embodiments described above are only some of the embodiments of the present invention, rather than all of the embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of protection of the present invention patent.

Claims

1. An electrical box, comprising a sealed housing (10), characterized in that: The housing (10) includes: A first mainboard (11), the first mainboard (11) being used to place a first component (111) having an operating temperature higher than a threshold temperature; a second main board (12), the second main board (12) being used to place a second component (121) whose operating temperature is lower than a threshold temperature; A refrigerant heat dissipation device (13), the refrigerant heat dissipation device (13) is located between the first main board (11) and the second main board (12), and the refrigerant heat dissipation device (13) faces one side of the first main board (11) and is provided with a matching heat dissipation rib (131) corresponding to each first component (111), and the refrigerant heat dissipation device (13) faces the other side of the second main board (12) and is connected to the second main board (12).

2. The electrical box according to claim 1, characterized in that: The refrigerant heat dissipation device (13) includes a temperature equalizing plate (132) and a refrigerant heat dissipation pipe (133) located in the temperature equalizing plate (132); The temperature averaging plate (132) faces one side of the first main board (11) and is provided with a matching heat dissipation rib (131) corresponding to each first component (111), and the temperature averaging plate (132) faces the other side of the second main board (12) and is connected to the second main board (12).

3. The electrical box according to claim 2, characterized in that: The temperature equalizing plates (132) are placed in a normal direction relative to the first main board (11) and the second main board (12).

4. The electrical appliance box according to claim 2, characterized in that: The distance L between the first main board (11) and the second main board (12) has a value range of D<L<2D; Wherein, D is the thickness of the temperature equalizing plate (132).

5. The electrical box according to claim 2, characterized in that: The temperature equalizing plate (132) is provided with a plurality of wire through-holes (1321), and the wire through-holes (1321) are used for passing wires to electrically connect the first main board (11) and the second main board (12).

6. The electrical appliance box according to claim 1, characterized in that: The first component (111) on the first main board (11) and the second component (121) on the second main board (12) are both close to the refrigerant heat dissipation device (13) and arranged along the length direction of the refrigerant heat dissipation device (13).

7. A multi-split air conditioner, comprising an outdoor unit, characterized in that: The outdoor unit includes the electrical appliance box according to any one of claims 1 to 6.

8. The multi-split air conditioner according to claim 7, characterized in that: The outdoor unit further comprises a housing (20), wherein a fan chamber (21) for accommodating a fan (23) and a compressor chamber (22) for accommodating a compressor (24) are provided in the housing (20); An electrical box is provided on the inner top of the housing (20), and the first main board (11) is arranged correspondingly to the fan cavity (21), and the second main board (12) is arranged correspondingly to the compressor cavity (22).

9. The multi-split air conditioner according to claim 8, characterized in that: The electrical box is placed upside down on the inner top of the housing (20).

10. The multi-split air conditioner according to claim 8, characterized in that: A buffer member is also tightly arranged between the inner top wall of the housing (20) and the electrical box.

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