High-voltage frequency conversion device

Abstract

The utility model relates to the technical field of power equipment, and discloses a high-voltage frequency conversion device, which comprises a cabinet body, a gas refrigeration mechanism, a pre-cooling mechanism, a first pipeline, a second pipeline and a flow guide mechanism, the pre-cooling mechanism comprises a phase change material layer, and the phase change material layer is arranged on the peripheral side face of the first pipeline; gas in the cabinet body is input into the first pipeline through the flow guide mechanism, then heat of the gas in the first pipeline is absorbed through the phase change material layer arranged on the first pipeline, pre-cooling is carried out, then the gas in the first pipeline is conveyed into the gas refrigeration mechanism to be cooled, and due to the fact that the phase change material layer is pre-cooled, the heat of the gas in the cabinet body is greatly reduced. According to the air cooling device, the air can be cooled to the preset temperature without large power of the air refrigeration mechanism, so that the energy consumption required for cooling the air is reduced, finally, the cooled air is input into the cabinet body through the second pipeline, and the interior of the cabinet body is purged under the action of the flow guide mechanism, so that the heat dissipation function is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a high-voltage frequency conversion device. Background Art

[0002] At present, there are many high-power power electronic components in the existing high-voltage frequency conversion devices. These power electronic components will generate a lot of heat when working, which will cause the working temperature of the high-voltage frequency conversion device to become higher, and then affect the service life of these power electronic components. Therefore, air conditioners are usually installed in existing high-voltage frequency conversion devices to dissipate heat to maintain the stability of the working temperature of the high-voltage frequency conversion device. However, due to the high heat generation of the high-voltage frequency conversion device, the heat dissipation requirements of the air conditioner are high. Therefore, a high compression ratio air conditioner is required to dissipate heat, which consumes a lot of energy. Utility Model Content

[0003] The purpose of the utility model is to provide a high-voltage frequency conversion device, which can reduce energy consumption under the premise of ensuring the heat dissipation effect.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a high-voltage frequency conversion device, including: a cabinet, a gas refrigeration mechanism, a pre-cooling mechanism, a first pipeline, a second pipeline and a flow guiding mechanism; the cabinet has a hot air outlet and a cold air inlet, and the hot air outlet and the cold air inlet are arranged at intervals along the height direction of the cabinet, and the interior of the cabinet is hollow for placing power electronic components; the gas refrigeration mechanism has an input end and an output end, the input end is connected to the hot air outlet through the first pipeline, and the output end is connected to the cold air inlet through the second pipeline, and the gas refrigeration mechanism is used to cool the gas input from the first pipeline; the pre-cooling mechanism includes a phase change material layer, the phase change material layer is arranged on the outer peripheral side of the first pipeline, and the phase change material layer is used to absorb the heat of the gas in the first pipeline; the flow guiding mechanism is arranged inside the cabinet, and is used to control the gas inside the cabinet to flow from the cold air inlet to the hot air outlet.

[0005] Optionally, the air guide mechanism includes a first fan and a second fan, the first fan is arranged at the hot air outlet, and the second fan is arranged at the cold air inlet.

[0006] Optionally, the air guide mechanism includes a plurality of the first fans and a plurality of the second fans, wherein the plurality of the first fans are evenly spaced at the hot air outlet, and the plurality of the second fans are evenly spaced at the cold air inlet.

[0007] Optionally, the hot air outlet is arranged at the top of the cabinet, and the cold air inlet is arranged at the bottom of the cabinet.

[0008] Optionally, the phase change material layer is made of cold gel.

[0009] Optionally, one end of the first pipe is detachably connected to the hot air outlet, and the other end is detachably connected to the input end.

[0010] Optionally, the precooling mechanism further includes a sleeve, which is sleeved on the first pipe, and the phase change material layer is arranged between the sleeve and the first pipe.

[0011] Optionally, the sleeve includes a sleeve portion, a first extension portion and a second extension portion, the sleeve portion is tubular and open at both ends, the first extension portion is arranged at one end of the sleeve portion, and extends along the inner circumferential side surface of the sleeve portion toward the first pipe, the second extension portion is arranged at the other end of the sleeve portion, and the second extension portion extends along the inner circumferential side surface of the sleeve portion toward the first pipe, the inner circumferential side surface of the sleeve portion, the first extension portion, the second extension portion and the outer circumferential side surface of the first pipe together enclose a accommodating cavity, and the phase change material layer is located in the accommodating cavity.

[0012] Compared with the prior art, the high-voltage frequency conversion device of the utility model embodiment has the following beneficial effects: the present application first inputs the gas in the cabinet into the first pipeline through the guide mechanism, and then absorbs the heat of the gas in the first pipeline through the phase change material layer arranged on the first pipeline for pre-cooling, and then the gas in the first pipeline is transported to the gas refrigeration mechanism for cooling. Since the phase change material layer has been pre-cooled, the power of the gas refrigeration mechanism does not need to be very large to cool the gas to a preset temperature, thereby reducing the energy consumption required for cooling the gas. Finally, the cooled gas is input into the cabinet through the second pipeline, and the interior of the cabinet is purged under the action of the guide mechanism to achieve the heat dissipation function. In addition, since the gas of the present application circulates between the cabinet, the first pipeline, the gas refrigeration mechanism, and the second pipeline, no external impurities will enter the cabinet during the heat dissipation process to affect the power electronic components in the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a high-voltage frequency conversion device according to an embodiment of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal structure of the precooling mechanism and the first pipeline in an embodiment of the utility model.

[0015] In the figure, 1, cabinet; 11, hot air outlet; 12, cold air inlet; 2, gas refrigeration mechanism; 21, input end; 22, output end; 3, pre-cooling mechanism; 31, phase change material layer; 32, sleeve; 321, sleeve part; 322, first extension part; 323, second extension part; 4, first pipeline; 5, second pipeline; 6, flow guide mechanism; 61, first fan; 62, second fan. DETAILED DESCRIPTION

[0016] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0017] In the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0019] like Figure 1 and Figure 2 As shown, a high-voltage frequency conversion device of an embodiment of the utility model includes: a cabinet 1, a gas refrigeration mechanism 2, a precooling mechanism 3, a first pipeline 4, a second pipeline 5 and a guide mechanism 6; the cabinet 1 has a hot air outlet 11 and a cold air inlet 12, and the hot air outlet 11 and the cold air inlet 12 are arranged at intervals along the height direction of the cabinet 1, and the interior of the cabinet 1 is hollow for placing power electronic components; the gas refrigeration mechanism 2 has an input end 21 and an output end 22, the input end 21 is connected to the hot air outlet 11 through the first pipeline 4, and the output end 22 is connected to the cold air inlet 12 through the second pipeline 5, and the gas refrigeration mechanism 2 is used to cool the gas input from the first pipeline 4; the precooling mechanism 3 includes a phase change material layer 31, the phase change material layer 31 is arranged on the outer peripheral side of the first pipeline 4, and the phase change material layer 31 is used to absorb the heat of the gas in the first pipeline 4; the guide mechanism 6 is arranged inside the cabinet 1, and is used to control the gas inside the cabinet 1 to flow from the cold air inlet 12 to the hot air outlet 11.

[0020] Based on the above scheme, the present application first inputs the gas in the cabinet 1 into the first pipe 4 through the guide mechanism 6, and then absorbs the heat of the gas in the first pipe 4 through the phase change material layer 31 arranged on the first pipe 4 for pre-cooling. Subsequently, the gas in the first pipe 4 is transported to the gas refrigeration mechanism 2 for cooling. Since the phase change material layer 31 has been pre-cooled, the power of the gas refrigeration mechanism 2 does not need to be very large to cool the gas to a preset temperature, thereby reducing the energy consumption required for cooling the gas. Finally, the cooled gas is input into the cabinet 1 through the second pipe 5. Under the action of the guide mechanism 6, the interior of the cabinet 1 is purged to achieve the heat dissipation function. In addition, since the gas of the present application circulates between the cabinet 1, the first pipe 4, the gas refrigeration mechanism 2, and the second pipe 5, no external impurities will enter the cabinet 1 during the heat dissipation process to affect the power electronic components in the cabinet 1.

[0021] like Figure 1 As shown, in order to ensure the drainage effect, the guide mechanism 6 includes a first fan 61 and a second fan 62. The first fan 61 is arranged at the hot air outlet 11, and the second fan 62 is arranged at the cold air inlet 12. The high-temperature gas inside the cabinet 1 is discharged from the hot air outlet 11 through the first fan 61, and the cooled gas is input into the interior of the cabinet 1 from the cold air inlet 12 through the second fan 62, and the interior of the cabinet 1 is purged.

[0022] Optionally, in order to ensure the drainage effect, the drainage mechanism 6 includes a plurality of first fans 61 and a plurality of second fans 62 , the plurality of first fans 61 are evenly spaced at the hot air outlet 11 , and the plurality of second fans 62 are evenly spaced at the cold air inlet 12 .

[0023] like Figure 1 As shown, in order to ensure the cooling effect and avoid the turbulent flow and mixing of cold air and hot air inside the cabinet 1, the hot air outlet 11 is arranged at the top of the cabinet 1 and the cold air inlet 12 is arranged at the bottom of the cabinet 1.

[0024] Optionally, in order to ensure the pre-cooling effect, the phase change material layer 31 is made of cold gel.

[0025] Optionally, for ease of use, one end of the first pipe 4 is detachably connected to the hot air outlet 11, and the other end is detachably connected to the input end 21, and the phase change material layer 31 on the first pipe 4 is replaced by disassembling and assembling the first pipe 4.

[0026] like Figure 1 and Figure 2 As shown, in order to protect the phase change material layer 31 and prevent the phase change material layer 31 from being damaged, the precooling mechanism 3 also includes a sleeve 32, the sleeve 32 is sleeved on the first pipe 4, and the phase change material layer 31 is arranged between the sleeve 32 and the first pipe 4.

[0027] like Figure 1 and Figure 2 As shown, in order to further protect the phase change material layer 31 and prevent impurities from entering the phase change material layer 31, the sleeve 32 includes a sleeve portion 321, a first extension portion 322 and a second extension portion 323. The sleeve portion 321 is tubular and open at both ends. The first extension portion 322 is arranged at one end of the sleeve portion 321 and extends toward the first pipe 4 along the inner circumferential side of the sleeve portion 321. The second extension portion 323 is arranged at the other end of the sleeve portion 321 and extends toward the first pipe 4 along the inner circumferential side of the sleeve portion 321. The inner circumferential side of the sleeve portion 321, the first extension portion 322, the second extension portion 323 and the outer circumferential side of the first pipe 4 together enclose a accommodating cavity, and the phase change material layer 31 is located in the accommodating cavity.

[0028] The working process of the utility model is:

[0029] 1. Under the rotation of the first fan 61, the high-temperature gas inside the cabinet 1 is transported from the hot air outlet 11 to the first pipe 4;

[0030] 2. After the high-temperature gas in the first pipe 4 absorbs heat from the phase change material layer 31 in the precooling mechanism 3, it is input into the input end 21 of the gas refrigeration mechanism 2;

[0031] 3. The gas refrigeration mechanism 2 cools the input gas and inputs the gas from the output end 22 to the cold air inlet 12 through the second pipe 5;

[0032] 4. With the action of the second fan 62 , the gas input from the cold air inlet 12 purges the interior of the cabinet 1 .

[0033] In summary, the embodiment of the utility model provides a high-voltage frequency conversion device, which first inputs the gas in the cabinet 1 into the first pipeline 4 through the guide mechanism 6, and then absorbs the heat of the gas in the first pipeline 4 through the phase change material layer 31 arranged on the first pipeline 4 for pre-cooling. Subsequently, the gas in the first pipeline 4 is transported to the gas refrigeration mechanism 2 for cooling. Since the phase change material layer 31 has been pre-cooled, the power of the gas refrigeration mechanism 2 does not need to be very large to cool the gas to a preset temperature, thereby reducing the energy consumption required for cooling the gas. Finally, the cooled gas is input into the cabinet 1 through the second pipeline 5. Under the action of the guide mechanism 6, the interior of the cabinet 1 is purged to achieve the heat dissipation function. In addition, since the gas of the present application circulates between the cabinet 1, the first pipeline 4, the gas refrigeration mechanism 2, and the second pipeline 5, no external impurities will enter the cabinet 1 during the heat dissipation process to affect the power electronic components in the cabinet 1.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A high voltage frequency conversion device, characterized in that: include: A cabinet, a gas refrigeration mechanism, a precooling mechanism, a first pipeline, a second pipeline and a flow guiding mechanism; The cabinet has a hot air outlet and a cold air inlet, and the hot air outlet and the cold air inlet are arranged at intervals along the height direction of the cabinet. The interior of the cabinet is hollow and is used to place power electronic components; The gas refrigeration mechanism has an input end and an output end, the input end is connected to the hot air outlet through the first pipe, and the output end is connected to the cold air inlet through the second pipe, and the gas refrigeration mechanism is used to cool the gas input from the first pipe; The precooling mechanism comprises a phase change material layer, the phase change material layer is arranged on the outer peripheral side of the first pipeline, and the phase change material layer is used to absorb the heat of the gas in the first pipeline; The flow guiding mechanism is arranged inside the cabinet and is used to control the gas inside the cabinet to flow from the cold air inlet to the hot air outlet.

2. The high voltage frequency conversion device according to claim 1, characterized in that: The air guide mechanism includes a first fan and a second fan, wherein the first fan is disposed at the hot air outlet, and the second fan is disposed at the cold air inlet.

3. The high voltage frequency conversion device according to claim 2, characterized in that: The air guide mechanism includes a plurality of the first fans and a plurality of the second fans. The plurality of the first fans are evenly spaced at the hot air outlet, and the plurality of the second fans are evenly spaced at the cold air inlet.

4. The high voltage frequency conversion device according to claim 1, characterized in that: The hot air outlet is arranged at the top of the cabinet, and the cold air inlet is arranged at the bottom of the cabinet.

5. The high voltage frequency conversion device according to claim 1, characterized in that: The phase change material layer is made of cold gel.

6. The high voltage frequency conversion device according to claim 1, characterized in that: One end of the first pipeline is detachably connected to the hot air outlet, and the other end is detachably connected to the input end.

7. The high voltage frequency conversion device according to claim 1, characterized in that: The precooling mechanism further includes a sleeve, which is sleeved on the first pipe, and the phase change material layer is arranged between the sleeve and the first pipe.

8. The high voltage frequency conversion device according to claim 7, characterized in that: The sleeve includes a sleeve portion, a first extension portion and a second extension portion. The sleeve portion is tubular and open at both ends. The first extension portion is arranged at one end of the sleeve portion and extends toward the first pipe along the inner circumferential side surface of the sleeve portion. The second extension portion is arranged at the other end of the sleeve portion and extends toward the first pipe along the inner circumferential side surface of the sleeve portion. The inner circumferential side surface of the sleeve portion, the first extension portion, the second extension portion and the outer circumferential side surface of the first pipe together enclose a accommodating cavity, and the phase change material layer is located in the accommodating cavity.

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