Multi-loop loop heat pipe, general frequency converter and variable frequency air conditioner

Abstract

The utility model discloses a multi-loop loop heat pipe, a general frequency converter and a variable frequency air conditioner, which comprise a heat pipe evaporation unit, a heat pipe condensation unit, and a gas refrigerant loop pipe and a liquid refrigerant loop pipe which are connected between the heat pipe evaporation unit and the heat pipe condensation unit to form a loop, the heat pipe evaporation unit is provided with a plurality of evaporation heat pipes which are arranged in parallel, and the heat pipe condensation unit is provided with a plurality of condensation heat pipes which are arranged in parallel; compared with the prior art, by means of the multiple evaporation heat pipes connected in parallel in the heat pipe evaporation unit and the multiple condensation heat pipes connected in parallel in the heat pipe condensation unit, the heat exchange area of evaporation and condensation can be increased, and the heat dissipation capacity is improved; and meanwhile, on-way resistance can be greatly reduced, and the circulation efficiency of the multi-loop loop heat pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange structures, in particular to a multi-circuit loop heat pipe, a universal frequency converter and a frequency conversion air conditioner. Background Art

[0002] Compared with conventional heat exchangers, heat pipe heat exchangers with heat pipes as heat transfer elements have many advantages, such as simple structure, easy installation, no need for additional refrigerant circulation power devices, low noise and low cost, and have great application prospects in the field of heat exchange.

[0003] Among them, the gravity loop heat pipe can realize automatic liquid return under the action of gravity, without adding a liquid absorption core structure. The pipeline structure is simple, and the condensation section and evaporation section of the heat pipe form a closed loop structure. The refrigerant is not easy to leak, and the system can operate reliably and stably for a long time.

[0004] At present, loop gravity heat pipes are increasingly used in cooling solutions for high-power heating devices such as variable-frequency air conditioners and general-purpose inverters. With the increase in the heating power of variable-frequency air conditioners and general-purpose inverters, the single-loop solutions that were originally mostly used have been difficult to meet the cooling needs.

[0005] For example, a patent application document with application number CN201910250736.7 discloses a gravity loop heat pipe, including a condenser, a liquid pipeline, an evaporator and a gas pipeline; the liquid outlet of the condenser is connected to the liquid inlet of the liquid pipeline, the liquid outlet of the liquid pipeline is connected to the liquid inlet of the evaporator, the gas outlet of the evaporator is connected to the gas inlet of the gas pipeline, and the gas outlet of the gas pipeline is connected to the inner cavity of the condenser to form a closed loop; the highest part of the liquid pipeline, evaporator and gas pipeline is higher than the lowest part on the condenser, and the gas outlet of the gas pipeline is higher than the liquid inlet of the liquid pipeline.

[0006] In the above, a single-loop structure is formed by a condenser, a liquid pipeline, an evaporator and a gas pipeline. With the increase in the heating power of variable-frequency air conditioners and general-purpose inverters, it is difficult to meet the heat dissipation requirements. Utility Model Content

[0007] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a multi-circuit loop heat pipe and its universal inverter and variable frequency air conditioner, so as to solve the problem in the prior art that the single-circuit structure has been difficult to meet the heat dissipation requirements as the heating power of the variable frequency air conditioner and the universal inverter increases.

[0008] To achieve the above-mentioned objectives, the first aspect of the utility model adopts the following technical solution: a multi-circuit loop heat pipe, comprising a heat pipe evaporation unit, a heat pipe condensation unit, and a gas refrigerant circuit pipe and a liquid refrigerant circuit pipe connected between the heat pipe evaporation unit and the heat pipe condensation unit to form a circuit, the heat pipe evaporation unit having a plurality of evaporation heat pipes arranged in parallel, and the heat pipe condensation unit having a plurality of condensation heat pipes arranged in parallel.

[0009] The second aspect of the utility model adopts the following technical solution: a universal inverter, including a universal inverter body, and also includes the multi-circuit loop heat pipe as described in the first aspect of the utility model, and the heat pipe evaporation unit is arranged on the universal inverter body.

[0010] The third aspect of the present invention adopts the following technical solution: a variable frequency air conditioner, comprising the universal frequency converter as described in the second aspect of the present invention.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The multi-circuit heat pipe can not only increase the heat exchange area of ​​evaporation and condensation and increase the heat dissipation capacity through the multiple evaporation heat pipes connected in parallel in the heat pipe evaporation unit and the multiple condensation heat pipes connected in parallel in the heat pipe condensation unit, but also greatly reduce the resistance along the way and improve the circulation efficiency of the multi-circuit heat pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0014] The figure marks in the drawings of the specification include: heat pipe evaporation unit 1, evaporation heat pipe 11, two evaporation main liquid pipes 12, heat pipe condensation unit 2, condensation heat pipe 21, two condensation main gas pipes 22, electric fan 23, gas refrigerant loop pipe 3, liquid refrigerant loop pipe 4. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below through specific implementation methods:

[0016] Because the existing gravity loop heat pipe mainly forms a single loop structure through the condenser, liquid pipeline, evaporator and gas pipeline, it is difficult to meet the heat dissipation requirements with the increase of heating power of variable frequency air conditioners and general inverters; in order to solve this problem, such as Figure 1As shown, an embodiment of the utility model proposes a multi-circuit loop heat pipe, including a heat pipe evaporation unit 1, a heat pipe condensation unit 2, and a gas refrigerant circuit pipe 3 and a liquid refrigerant circuit pipe 4 connected between the heat pipe evaporation unit 1 and the heat pipe condensation unit 2 to form a circuit, the heat pipe evaporation unit 1 has a plurality of evaporation heat pipes 11 arranged in parallel, and the heat pipe condensation unit 2 has a plurality of condensation heat pipes 21 arranged in parallel.

[0017] When in use, the heat pipe evaporator unit 1 is set on the heating device. The liquid refrigerant condensed by the heat pipe condensation unit 2 enters the multiple evaporation heat pipes 11 in the heat pipe evaporator unit 1 through the liquid refrigerant loop pipe 4 to exchange heat with the heating device. The liquid refrigerant evaporates and absorbs heat to take away the heat generated by the heating device and the liquid refrigerant changes into a gas refrigerant. The gas refrigerant is guided back to the heat pipe condensation unit 2 through the gas refrigerant loop pipe 3 to exchange heat in the multiple condensation heat pipes 21 to release heat. The gas refrigerant is condensed into liquid refrigerant and then introduced into the heat pipe evaporator unit 1 through the liquid refrigerant loop pipe 4 for recycling.

[0018] The multi-loop heat pipe can not only increase the heat exchange area of ​​evaporation and condensation and the heat dissipation capacity through the multiple evaporation heat pipes 11 connected in parallel in the heat pipe evaporation unit 1 and the multiple condensation heat pipes 21 connected in parallel in the heat pipe condensation unit 2; it can also greatly reduce the resistance along the way and improve the circulation efficiency of the multi-loop heat pipe.

[0019] like Figure 1 As shown, according to another embodiment of the utility model, the multi-circuit loop heat pipe, wherein the heat pipe evaporation unit 1 also has two evaporation main liquid pipes 12, a plurality of evaporation heat pipes 11 are arranged in parallel between the two evaporation main liquid pipes 12, and the two evaporation main liquid pipes 12 are connected with the gas refrigerant loop pipe 3 and the liquid refrigerant loop pipe 4 in a one-to-one correspondence. Specifically, the two evaporation main liquid pipes 12 are arranged vertically, and the plurality of evaporation heat pipes 11 are arranged horizontally between the two evaporation main liquid pipes 12; wherein, one evaporation main liquid pipe evenly distributes the liquid refrigerant introduced into the liquid refrigerant loop pipe 4 to the plurality of evaporation heat pipes 11, exchanges heat with the heating device, takes away the heat generated by the heating device and the liquid refrigerant is phase-changed into a gas refrigerant, and the gas refrigerant is collected in another evaporation main liquid pipe and then enters the gas refrigerant loop pipe 3.

[0020] The heat pipe condensing unit 2 also has two condensing main air pipes 22, and a plurality of condensing heat pipes 21 are arranged between the two condensing main air pipes 22, and the two condensing main air pipes 22 are connected to the gas refrigerant loop pipe 3 and the liquid refrigerant loop pipe 4 in a one-to-one correspondence. Specifically, the two condensing main air pipes 22 are arranged horizontally, and the plurality of condensing heat pipes 21 are arranged vertically between the two condensing main air pipes 22; wherein, one condensing main air pipe evenly distributes the gas refrigerant introduced into the gas refrigerant loop pipe 3 to the plurality of condensing heat pipes 21, performs heat exchange to change the gas refrigerant into liquid refrigerant, and the liquid refrigerant enters the liquid refrigerant loop pipe 4 after being collected in another condensing main air pipe.

[0021] Specifically, the heat pipe condensing unit 2 also has a heat pipe radiator, and at least a plurality of condensing heat pipes 21 are arranged on the heat pipe radiator. The heat pipe radiator exchanges heat with the gas refrigerant in the plurality of condensing heat pipes 21 to change the gas refrigerant into a liquid refrigerant. The two condensing main gas pipes 22 and the plurality of condensing heat pipes 21 can also be attached to the heat pipe radiator to increase the heat exchange area and improve the heat exchange capacity.

[0022] Furthermore, the heat pipe radiator is also provided with a heat dissipation accelerator, which may be an electric fan 23, to accelerate the heat dissipation capacity of the heat pipe radiator, thereby improving the ability of the heat pipe condensation unit 2 to change the phase of the liquid refrigerant into the liquid refrigerant.

[0023] like Figure 1 As shown, according to another embodiment of the present utility model, in the multi-circuit loop heat pipe, the heat pipe evaporation unit 1 is arranged below the heat pipe condensation unit 2.

[0024] During use, the heat pipe evaporation unit 1 is set on the heating device. The liquid refrigerant after condensation by the heat pipe condensation unit 2 flows in the liquid refrigerant loop pipe 4 into an evaporation main liquid pipe connected to it in the heat pipe evaporation unit 1 only under the action of gravity, and then is evenly distributed to multiple evaporation heat pipes 11 to exchange heat with the heating device. The liquid refrigerant evaporates and absorbs heat to take away the heat generated by the heating device and the liquid refrigerant changes into a gas refrigerant. The gas refrigerant is collected in another evaporation main liquid pipe. Then the gas refrigerant is guided back to a condensation main air pipe connected to it in the heat pipe condensation unit 2 through the gas refrigerant loop pipe 3. This condensation main air pipe evenly distributes the gas refrigerant to multiple condensation heat pipes 21 to exchange heat with the heat pipe radiator. At the same time, the electric fan 23 runs to enhance heat exchange and release heat. The gas refrigerant condenses into liquid refrigerant. After the liquid refrigerant is collected in another condensation main air pipe, it is introduced into the heat pipe evaporation unit 1 for recycling through the liquid refrigerant loop pipe 4 only under the action of gravity.

[0025] According to another embodiment of the utility model, a multi-circuit loop heat pipe, wherein the diameter of the gas refrigerant loop pipe 3 is larger than the diameter of the liquid refrigerant loop pipe 4, generally the diameter of the gas refrigerant loop pipe 3 is twice the diameter of the liquid refrigerant loop pipe 4, for example, the diameter of the gas refrigerant loop pipe 3 is 16 cm, and the diameter of the liquid refrigerant loop pipe 4 is 8 cm; this design can reduce the resistance along the gas pipe flow path.

[0026] According to another embodiment of the utility model, in the multi-circuit loop heat pipe, the liquid refrigerant loop pipe 4 is a liquid wick heat pipe.

[0027] In this solution, the liquid refrigerant loop pipe 4 can be designed as a liquid wick heat pipe to further enhance the refrigerant circulation power.

[0028] According to another embodiment of the utility model, a universal inverter comprises a universal inverter body and a multi-circuit loop heat pipe in any of the above embodiments, and the heat pipe evaporation unit 1 is arranged on the universal inverter body; that is, the universal inverter body is the above-mentioned heating device, and the multi-circuit loop heat pipe is used to efficiently dissipate heat from the universal inverter body.

[0029] It should be noted that the multi-circuit loop heat pipe is not limited to use in general-purpose inverters, but can also be used in conjunction with other high-power heating devices to dissipate heat.

[0030] According to another embodiment of the present invention, the variable frequency air conditioner includes the universal frequency converter described in the above embodiment, so that the variable frequency air conditioner has a universal frequency converter with better heat dissipation effect.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A multi-circuit loop heat pipe, comprising a heat pipe evaporation unit, a heat pipe condensation unit, and a gas refrigerant loop pipe and a liquid refrigerant loop pipe connected between the heat pipe evaporation unit and the heat pipe condensation unit to form a loop, characterized in that: The heat pipe evaporation unit has a plurality of evaporation heat pipes arranged in parallel, and the heat pipe condensation unit has a plurality of condensation heat pipes arranged in parallel.

2. The multi-circuit loop heat pipe according to claim 1, characterized in that: The heat pipe evaporation unit also has two evaporation main liquid pipes, a plurality of evaporation heat pipes are arranged in parallel between the two evaporation main liquid pipes, and the two evaporation main liquid pipes are connected to the gas refrigerant loop pipe and the liquid refrigerant loop pipe in a one-to-one correspondence.

3. The multi-circuit loop heat pipe according to claim 1, characterized in that: The heat pipe condensing unit also has two condensing main air pipes, and a plurality of condensing heat pipes are arranged between the two condensing main air pipes, and the two condensing main air pipes are connected to the gas refrigerant circuit pipe and the liquid refrigerant circuit pipe in a one-to-one correspondence.

4. The multi-circuit loop heat pipe according to claim 3, characterized in that: The heat pipe condensing unit also has a heat pipe radiator, and at least a plurality of condensing heat pipes are cooperatively arranged on the heat pipe radiator.

5. The multi-circuit loop heat pipe according to claim 4, characterized in that: The heat pipe radiator is also provided with a heat dissipation accelerator.

6. The multi-circuit loop heat pipe according to claim 1, characterized in that: The heat pipe evaporation unit is arranged below the heat pipe condensation unit.

7. The multi-circuit loop heat pipe according to claim 1, characterized in that: The liquid refrigerant loop pipe is a liquid wick heat pipe.

8. The multi-circuit loop heat pipe according to claim 1, characterized in that: The diameter of the gas refrigerant circuit pipe is larger than the diameter of the liquid refrigerant circuit pipe.

9. A universal frequency converter, comprising a universal frequency converter body, characterized in that: It also includes a multi-circuit loop heat pipe as described in any one of claims 1 to 8, and the heat pipe evaporation unit is arranged on the universal inverter body.

10. A variable frequency air conditioner, characterized in that: It comprises the universal frequency converter as claimed in claim 9.

Images