Heat dissipation device and variable frequency air conditioner

Abstract

The utility model belongs to the technical field of refrigeration, and relates to a heat dissipation device and a variable frequency air conditioner, the heat dissipation device is used for heat dissipation of a variable frequency module, the variable frequency module is provided with a heating part for generating heat, the heat dissipation device comprises a radiator, a heat exchange pipe and a heat absorption piece, the radiator is provided with a shell, and a cavity is formed in the shell; the cavity comprises a first cavity and a second cavity which are communicated with each other, the heat exchange tube is arranged on the shell and is adjacent to the second cavity, the heat absorption part is fixedly connected to the shell, the heat absorption part is adjacent to the first cavity and is suitable for absorbing heat of the heating part, the first cavity is filled with a refrigerant, and the second cavity is filled with a refrigerant. The refrigerant can flow into the second cavity after absorbing heat in the first cavity and flow back to the first cavity after releasing heat in the second cavity. According to the technical scheme, heat generated by the frequency conversion module can be transferred into the heat exchange pipe through the radiator to be taken away, the high-temperature position of the frequency conversion module can be mainly cooled, the heat exchange area is large, and the heat dissipation effect is good.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and more specifically, to a heat dissipation device and a variable frequency air conditioner. Background Art

[0002] When the inverter module of the inverter air conditioner is working, the temperature of the inverter module will rise, especially in a high temperature environment. The higher the operating frequency of the compressor, the more heat the inverter module generates. The operating temperature of the inverter module directly determines the service life and stability of the air conditioner. Since the inverter module generates a lot of heat during use, in order to ensure the normal operation of the inverter module, the inverter module must be effectively cooled.

[0003] The inverter module mainly dissipates heat through the radiator. The existing radiator is connected to the heat exchange circulation loop of the air conditioning system, and directly uses the refrigerant in the heat exchange tube of the air conditioning system to cool and control the temperature of the inverter module. The radiator only exchanges heat with the radiator through the refrigerant flowing in the heat exchange tube, and the heat exchange area is small, the heat dissipation effect is poor, and the high temperature position of the inverter module cannot be mainly cooled. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present application is that the existing frequency conversion module heat sink has a small heat exchange area, poor heat dissipation effect, and is unable to mainly cool the high-temperature position of the frequency conversion module.

[0005] In order to solve the above technical problems, the embodiment of the present application provides a heat dissipation device, which adopts the following technical solution:

[0006] A heat dissipation device is used for heat dissipation of a frequency conversion module, wherein the frequency conversion module has a heat generating part, and the heat dissipation device comprises: a radiator, a heat exchange tube and a heat absorbing element;

[0007] The radiator has a shell, a cavity is formed in the shell, and the cavity includes a first chamber and a second chamber that are interconnected;

[0008] The heat exchange tube is arranged on the shell and is arranged adjacent to the second chamber;

[0009] The heat absorbing member is fixedly connected to the housing, the heat absorbing member is arranged adjacent to the first chamber, and the heat absorbing member is suitable for absorbing the heat of the heating part;

[0010] The first chamber is filled with a refrigerant, and the refrigerant can flow into the second chamber after absorbing heat in the first chamber, and flow back to the first chamber after releasing heat in the second chamber.

[0011] Furthermore, the shell includes an outer shell and an inner shell, the inner shell is arranged inside the outer shell, the heat absorption element is fixedly connected to the outer shell corresponding to the first chamber, and the outer shell is suitable for heat exchange with the heat absorption element and the refrigerant in the first chamber.

[0012] Furthermore, the heat absorbing element is thermal insulation cotton.

[0013] Furthermore, the inner shell and the outer shell are fitted together, and the inner cavity is formed by the inner shell.

[0014] Furthermore, the outer shell and / or the inner shell is a flat shell structure.

[0015] Furthermore, the outer shell is made of a high thermal conductivity material, and the inner shell is made of an anti-corrosion material.

[0016] Furthermore, a mounting groove is provided on the outer wall surface of the outer shell, the mounting groove is recessed inward, and the heat exchange tube is arranged in the mounting groove.

[0017] In order to solve the above technical problems, the embodiment of the present application further provides a variable frequency air conditioner, which adopts the following technical solution:

[0018] A variable frequency air conditioner comprises a variable frequency module and the heat dissipation device as described above, wherein the variable frequency module has a heat generating portion for generating heat, and the heat generating portion is arranged adjacent to the heat absorbing element.

[0019] Furthermore, the frequency conversion module is connected to the housing via fasteners, an installation gap is formed between the frequency conversion module and the heat absorption component, a heat conductive component is arranged in the installation gap, and the heat conductive component is in close contact with the frequency conversion module and the heat absorption component respectively.

[0020] Furthermore, the heat conducting member is a heat conducting silicone sheet, and the fastening member is a buckle and / or a screw.

[0021] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0022] (1) A heat sink and a heat absorber are added between the frequency conversion module and the heat exchange tube. The frequency conversion module is in contact with the heat absorber, and the heat absorber covers the heat-generating part, thereby increasing the heat exchange area. The radiator is filled with refrigerant, and the refrigerant transfers heat through phase change, thereby greatly improving the heat dissipation effect.

[0023] (2) A heat absorbing element with good heat absorption effect is arranged at the heat generating part of the frequency conversion module, and the heat absorbing element is arranged close to the first chamber. The heat absorbing element can quickly absorb the heat of the heat generating part and transfer the heat to the refrigerant in the first chamber through the shell, so that the heat absorption and transfer of the heat of the heat generating part are more accurate, and the heat exchange effect is also improved.

[0024] (3) By using a radiator, the heat exchange tube only needs to be arranged in close contact with the second chamber to facilitate heat exchange with the refrigerant in the second chamber. The heat exchange tube does not need to cover the entire radiator and the frequency conversion module, which can greatly shorten the length of the heat exchange tube and save the material cost of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the solutions in the present application or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a prior art diagram involved in the background technology of this application;

[0027] Figure 2 This is a schematic diagram of the state conversion of the refrigerant in the heat dissipation device provided by the embodiment of the utility model;

[0028] Figure 3 is a side view of the heat dissipation device provided by an embodiment of the utility model;

[0029] Figure 4 It is a front view of the housing and the heat absorbing element provided in the embodiment of the utility model;

[0030] Figure 5 It is a side view of the housing and the heat absorbing element provided in the embodiment of the utility model;

[0031] Figure 6 It is a front view of the installation position of the heat exchange tube provided by the embodiment of the utility model;

[0032] Figure 7 It is a side view of the installation position of the heat exchange tube provided in the embodiment of the utility model.

[0033] Reference numerals:

[0034] 1. Radiator; 11. Shell; 12. First chamber; 13. Second chamber; 111. Inner shell; 112. Outer shell; 113. Mounting slot; 2. Frequency conversion module; 3. Heat exchange tube; 4. Heat absorption element. DETAILED DESCRIPTION

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0036] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0038] like Figure 1 As shown, in the related prior art, the heat dissipation device is composed of a frequency conversion module 2 and a heat exchange tube 3, a condensing agent circulates in the heat exchange tube 3, and the heat exchange tube 3 is evenly distributed on the frequency conversion module 2 to perform heat exchange and cooling on the frequency conversion module 2, but the contact area between the heat exchange tube 3 and the frequency conversion module 2 is small, the heat exchange area is small, and it is impossible to accurately dissipate heat for the main heating parts of the frequency conversion module 2, resulting in poor heat dissipation effect.

[0039] Combine the following Figures 2 to 7 , describing an embodiment of the utility model.

[0040] Please refer to Figure 2 to Figure 4 As shown, the heat dissipation device of the present application is used for heat dissipation of the frequency conversion module 2. The frequency conversion module 2 has a heat generating part (not shown in the figure) that generates heat. The heat dissipation device includes: a radiator 1, a frequency conversion module 2, a heat exchange tube 3 and a heat absorption member 4. The radiator 1 has a shell 11. A cavity is formed in the shell 11. The cavity includes a first chamber 12 and a second chamber 13 that are interconnected. The heat exchange tube 3 is arranged on the shell 11. The heat exchange tube 3 is arranged adjacent to the second chamber 13. The heat absorption member 4 is fixedly connected to the shell 11. The heat absorption member 4 is arranged adjacent to the first chamber 12. The heat absorption member 4 is suitable for absorbing heat from the heat generating part. The first chamber 12 is filled with a refrigerant. The refrigerant can flow into the second chamber 13 after absorbing heat in the first chamber 12, and flow back to the first chamber 12 after the second chamber 13 releases heat.

[0041] In this embodiment, the heat absorption member 4 is fitted and fixed on the shell 11 and the heat absorption member 4 is arranged adjacent to the first chamber 12. The heat absorption member 4 is sandwiched between the heat generating part and the shell 11. The heat absorption member 4 is in direct or indirect contact with the heat generating part to absorb the heat of the heat generating part. After the heat absorption member 4 absorbs the heat of the heat generating part, the heat is transferred to the refrigerant in the first chamber 12 through the shell 11. After the refrigerant absorbs the heat, it flows from the first chamber 12 to the second chamber 13. The heat exchange tube 3 is filled with a circulating condensing agent. The heat exchange tube 3 is arranged on the shell 11, and the heat exchange tube 3 is arranged adjacent to the second chamber 13. The heat exchange tube 3 is used to condense the refrigerant in the second chamber 13. The refrigerant in the second chamber 13 releases heat and flows back to the first chamber 12. The positional relationship between the first chamber 12 and the second chamber 13 of the radiator 1 is not limited, and can be arranged up and down, left and right, or in other arrangements. Generally, it is best for the first chamber 12 to be located below the second chamber 13.

[0042] In this embodiment, there is no specific limitation on the initial form of the refrigerant, which may be a liquid refrigerant or a solid refrigerant. Preferably, the initial form of the refrigerant is a liquid refrigerant. The refrigerant in the first chamber 12 is a liquid refrigerant when it is not absorbing heat. When the frequency conversion module 2 is working, the heating part of the frequency conversion module 2 generates heat. After the heat absorption component 4 absorbs the heat of the heating part, the heat is transferred to the refrigerant in the first chamber 12 through the shell 11. After absorbing heat, the refrigerant undergoes a phase change from liquid to gas and moves to the second chamber 13. At this time, the condensing agent in the heat exchange tube 3 absorbs the heat of the gaseous refrigerant in the second chamber 13. The gaseous refrigerant in the second chamber 13 is condensed into a liquid after heat exchange with the condensing agent. The liquid refrigerant in the second chamber 13 returns to the first chamber 12 under the action of its own gravity or external force, and the cycle continues.

[0043] Preferably, the first chamber 12 of this embodiment is located below the second chamber 13, and the liquid refrigerant in the second chamber 13 falls back into the first chamber 12 due to its own gravity. No additional power is required for the refrigerant, which can simplify the structure of the entire heat dissipation device and save costs.

[0044] In this embodiment, the specific composition of the refrigerant is not limited, and it can be water, sodium, mercury or 1,1,1,2-tetrafluoroethane. Preferably, the refrigerant in this embodiment is 1,1,1,2-tetrafluoroethane.

[0045] In this embodiment, a heat absorbing element 4 with good heat absorption effect is arranged between the heat generating part and the shell 11. The heat absorbing element 4 can quickly absorb the heat of the heat generating part and transfer the heat to the refrigerant in the first chamber 12 through the shell 11, so that the heat absorption and transfer of the heat of the heat generating part are more accurate, and the heat exchange efficiency is also improved. At the same time, the heat exchange tube 3 only needs to be arranged in contact with the second chamber 13, and the heat exchange tube 3 does not need to cover the entire radiator 1 and the frequency conversion module 2, which can greatly shorten the length of the heat exchange tube 3 and save the material cost of the heat exchange tube 3.

[0046] In one embodiment, Figure 4 and Figure 5 As shown, the shell 11 includes an outer shell 112 and an inner shell 111. The inner shell 111 is arranged inside the outer shell 112. The heat absorption element 4 is fixedly connected to the outer shell 112 corresponding to the first chamber 12. The outer shell 112 is suitable for heat exchange with the heat absorption element 4 and the refrigerant in the first chamber 12.

[0047] Specifically, the outer shell 112 is used to transfer the heat absorbed by the heat absorbing component 4 to the refrigerant. The outer shell 112 is made of a material with excellent thermal conductivity, and the heat absorbing component 4 is made of a material with good heat absorption performance. In this embodiment, the materials used for the outer shell 112 and the heat absorbing component 4 are not specifically limited.

[0048] In an optional embodiment, if Figure 4 and Figure 5 As shown, the heat absorbing element 4 is a sheet-like thermal insulation cotton with a certain thickness, and a sticky tape is provided on the back of the thermal insulation cotton. When fixing the thermal insulation cotton, first cut the thermal insulation cotton into a suitable size according to needs, and then directly stick the thermal insulation cotton on the outer shell 112 corresponding to the first chamber 12. The processing and fixing procedures of the thermal insulation cotton are simple and easy to operate. In addition, the thermal insulation cotton may be deformed when squeezed. When the heating part of the frequency conversion module 2 is close to the thermal insulation cotton and squeezes the thermal insulation cotton, the thermal insulation cotton is deformed and fits and wraps the heating part, so that the contact area and heat exchange area between the heating part and the thermal insulation cotton are increased, the fitting effect is better, and the heat exchange effect between the thermal insulation cotton and the heating part is improved.

[0049] Furthermore, the thermal insulation cotton has the advantages of low material cost, good heat absorption and thermal insulation, etc. The thermal insulation cotton has good heat absorption performance, can quickly absorb the heat of the heating part of the frequency conversion module 2, and then transfer the heat to the refrigerant through the outer shell 112 with good thermal conductivity, so as to achieve the purpose of quickly cooling the heating part. At the same time, the thermal insulation cotton has a certain thermal insulation property, which can prevent the heat from other parts and spaces outside the heating part from being transferred to the first chamber 12, so as to achieve the precise heat absorption and heat exchange of the heating part by the thermal insulation cotton.

[0050] In one embodiment, Figure 4 and Figure 5 As shown, the inner shell 111 and the outer shell 112 are fitted together, and the inner cavity is formed by the inner shell 111 .

[0051] Specifically, the outer wall surface of the inner shell 111 and the inner wall surface of the outer shell 112 are in close contact with each other, and the inner shell 111 and the outer shell 112 can be fixedly connected by welding, bonding, riveting, fastener connection and other methods. Preferably, the inner shell 111 and the outer shell 112 are fixedly connected by manual arc welding, which has the advantages of simple and light equipment and flexible operation.

[0052] In this embodiment, an inner shell 111 is provided inside the outer shell 112. The inner shell 111 can isolate the outer shell 112 from the refrigerant to prevent the refrigerant from corroding the outer shell 112. The outer wall surface of the inner shell 111 and the inner wall surface of the outer shell 112 are in close contact with each other, which can improve the heat exchange effect between the inner shell 111, the outer shell 112 and the refrigerant.

[0053] In one embodiment, Figure 4 and Figure 5 As shown, the outer shell 112 and / or the inner shell 111 is a flat shell structure.

[0054] In this embodiment, the outer shell 112 and / or the inner shell 111 are flat structures, so that the overall volume of the radiator 1 is small and does not take up space. This example does not limit the specific shapes of the outer shell 112 and the inner shell 111, which can be flat box-shaped shells, spherical shells, cylindrical shells and shells of other shapes.

[0055] Preferably, the outer shell 112 and the inner shell 111 are both flat box structures. The outer shell 112 and the inner shell 111 adopt a flat box structure. On the one hand, it is convenient for the outer shell 112 and the inner shell 111 to be installed in a fitting manner. On the other hand, the outer shell 112 is a box structure, and the outer wall of the box is a flat structure. Compared with the curved surface structure or other special-shaped structures, the frequency conversion module 2, the heat exchange tube 3 and the heat absorption component 4 are easier to be fixed on the outer wall of the outer shell 112.

[0056] In one embodiment, the outer shell 112 is made of a high thermal conductivity material, and the inner shell 111 is made of an anti-corrosion material.

[0057] Preferably, the outer shell 112 is made of an aluminum alloy material that has good thermal conductivity and is inexpensive, and the inner shell 111 is made of a stainless steel material that is corrosion-resistant, high-pressure-resistant, and has certain thermal conductivity.

[0058] In one embodiment, Figure 6 and Figure 7 As shown, a mounting groove 113 is formed on the outer wall surface of the outer shell 112 . The mounting groove 113 is recessed inwardly, and the heat exchange tube 3 is disposed in the mounting groove 113 .

[0059] Specifically, the mounting groove 113 is arranged on the outer shell 112 corresponding to the second chamber 13, and the mounting groove 113 is recessed inwardly, at least part of the pipeline of the heat exchange tube 3 is located in the mounting groove 113 and contacts the groove wall of the mounting groove 113, so that the contact between the heat exchange tube 3 and the outer shell 112 is more fitted, and the heat exchange between the heat exchange tube 3 and the second chamber 13 is more sufficient. In addition, the heat exchange tube 3 only needs to be arranged on the outer shell 112 corresponding to the second chamber 13 to condense the refrigerant in the second chamber 13, and there is no need to cover the entire outer shell 112, so that the length of the heat exchange tube 3 can be shortened and the material cost of the heat exchange tube 3 can be saved.

[0060] Furthermore, in order to make the heat exchange tube 3 more firmly fixed on the outer shell 112, a fastener is provided on the outer shell 112 or the heat exchange tube 3, and the heat exchange tube 3 is fixed to the outer shell 112 by the fastener. In addition, the shape of the part of the heat exchange tube 3 corresponding to the second chamber 13 is not limited, and can be linear, U-shaped, bow-shaped, serpentine or other shapes.

[0061] In some embodiments not shown, both the outer shell 112 and the inner shell 111 are provided with through holes for the heat exchange tube 3 to pass through. At least part of the heat exchange tube 3 passes through the through holes on the outer shell 112 and the inner shell 111 and flows through the second chamber 13. The part of the heat exchange tube 3 located in the second chamber 13 directly contacts the refrigerant in the second chamber 13 and performs heat exchange, thereby effectively improving the heat exchange effect.

[0062] According to an embodiment of the utility model, a variable frequency air conditioner is also provided, including a variable frequency module 2 and the heat dissipation device as described above, the variable frequency module 2 has a heating part (not shown in the figure) that generates heat, and the heating part is arranged adjacent to the heat absorbing element 4.

[0063] In one embodiment, the frequency conversion module 2 is connected to the outer shell 112 by fasteners, and an installation gap is formed between the frequency conversion module 2 and the heat absorption component 4. A heat conductive component (not shown in the figure) is arranged in the installation gap, and the heat conductive component is in contact with the frequency conversion module 2 and the heat absorption component 4 respectively.

[0064] Specifically, after the frequency conversion module 2 and the outer shell 112 are installed by fasteners, an installation gap will be left between the frequency conversion module 2 and the heat absorption component 4. In order to avoid the poor heat transfer effect caused by the lack of fit between the two, a heat conductive component is added in the installation gap, and the heat conductive component is pressed and contacted with the frequency conversion module 2 and the heat absorption component 4 respectively. The heat of the frequency conversion module 2 is first transferred to the heat conductive component, and the heat conductive component then transfers the heat to the heat absorption component 4.

[0065] In an optional implementation, the heat conducting member is a heat conducting silicone sheet, and the fastening member is a buckle and a screw.

[0066] Specifically, when installing the frequency conversion module 2 and the radiator 1, first stick the silicone sheet in the gap between the heating part of the frequency conversion module 2 and the heat absorption component 4, and then preliminarily fix the upper part of the frequency conversion module 2 and the radiator 1 by buckles, and finally fix the frequency conversion module 2 and the radiator 1 around with screws, and press the thermal conductive silicone sheet in the installation gap. Through the cooperation of the buckles and screws, the installation between the frequency conversion module 2 and the radiator 1 is more convenient and stable, and the thermal conductive silicone sheet fits more closely with the frequency conversion module 2 and the heat absorption component 4, and the heat transfer effect is better.

[0067] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application 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 application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A heat dissipation device for dissipating heat from a frequency conversion module, wherein the frequency conversion module has a heat generating portion, characterized in that: include: A radiator, the radiator having a shell, a cavity formed in the shell, the cavity comprising a first chamber and a second chamber connected to each other; a heat exchange tube, the heat exchange tube being arranged on the shell and being arranged closely adjacent to the second chamber; and A heat absorbing member, the heat absorbing member is fixedly connected to the housing, the heat absorbing member is disposed adjacent to the first chamber, and the heat absorbing member is suitable for absorbing heat from the heat generating portion; The first chamber is filled with a refrigerant, and the refrigerant can flow into the second chamber after absorbing heat in the first chamber, and flow back to the first chamber after releasing heat in the second chamber.

2. The heat dissipation device according to claim 1, characterized in that: The shell includes an outer shell and an inner shell, the inner shell is arranged inside the outer shell, the heat absorption element is fixedly connected to the outer shell corresponding to the first chamber, and the outer shell is suitable for heat exchange with the heat absorption element and the refrigerant in the first chamber.

3. The heat dissipation device according to claim 2, characterized in that: The heat absorbing element is thermal insulation cotton.

4. The heat dissipation device according to claim 2, characterized in that: The inner shell and the outer shell are fitted together, and the cavity is formed by the inner shell.

5. The heat dissipation device according to claim 4, characterized in that: The outer shell and / or the inner shell is a flat shell structure.

6. The heat dissipation device according to claim 5, characterized in that: The outer shell is made of a high thermal conductivity material, and the inner shell is made of an anti-corrosion material.

7. The heat dissipation device according to claim 2, characterized in that: An installation groove is provided on the outer wall surface of the outer shell, the installation groove is recessed inward, and the heat exchange tube is arranged in the installation groove.

8. A variable frequency air conditioner, characterized in that: The heat dissipation device comprises a frequency conversion module and any one of claims 1 to 7, wherein the frequency conversion module has a heat generating portion for generating heat, and the heat generating portion is arranged adjacent to the heat absorbing element.

9. The variable frequency air conditioner according to claim 8, characterized in that: The frequency conversion module is connected to the housing through a fastener, an installation gap is formed between the frequency conversion module and the heat absorption component, a heat conductive component is arranged in the installation gap, and the heat conductive component is respectively in contact with the frequency conversion module and the heat absorption component.

10. The variable frequency air conditioner according to claim 9, characterized in that: The heat conducting member is a heat conducting silicone sheet, and the fastening member is a buckle and / or a screw.

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