Frequency converter box with reinforced heat dissipation structure

Abstract

The utility model provides a frequency converter box with a reinforced heat radiation structure, comprising a fixed plate, a heat radiation fin and a cover body, the fixed plate is used for installing a frequency converter, the cover body is arranged on one side of the fixed plate and is used for covering the frequency converter, the fixed plate is provided with a through hole corresponding to a main power element on the frequency converter, the heat radiation fin is arranged on the other side of the fixed plate, and the cover body is used for covering the frequency converter. Bulges are arranged on one surfaces, facing the through holes, of the radiating fins, the shapes of the bulges are matched with those of the corresponding through holes, and the other surfaces of the radiating fins are exposed outwards; a plurality of supporting columns are arranged between the cooling fins and the fixing plate so that ventilation gaps can be formed between the cooling fins and the fixing plate. According to the utility model, the cost is reduced while the heat dissipation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a frequency converter box with an enhanced heat dissipation structure. Background Art

[0002] With the large-scale popularization of variable-frequency refrigerators and the diversification of the market, more challenges have been posed to the miniaturization and high power of variable-frequency compressors. Traditional frequency converters adopt a structure in which power devices are attached to a flat radiator or a structure in which a whole radiator is flatly attached under the entire variable-frequency board. In this traditional heat dissipation method, the heat dissipation efficiency is relatively low. Only one side of the heat sink is exposed outside the box for heat dissipation, and the other side is sealed inside the box, which is quite dependent on the thermal conductivity of the thermal paste. It is understood that the cost of thermal paste with high and low thermal conductivity almost shows an exponential relationship. In short, this traditional heat dissipation method has a relatively low overall heat dissipation coefficient and a high cost. Summary of the Invention

[0003] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art, and provide a frequency converter box with an enhanced heat dissipation structure.

[0004] The specific scheme of the utility model is: a frequency converter box with an enhanced heat dissipation structure, including a fixing plate, a heat sink and a cover body. The fixing plate is used for installing the frequency converter, and the cover body is arranged on one side of the fixing plate to cover the frequency converter. Through holes are provided on the fixing plate corresponding to the main power components on the frequency converter. The heat sink is arranged on the other side of the fixing plate. A protrusion is provided on the side of the heat sink facing the through hole, and the shape of the protrusion matches the corresponding through hole. The other side of the heat sink is exposed outward. A plurality of struts are provided between the heat sink and the fixing plate so that there is a ventilation gap between the heat sink and the fixing plate.

[0005] Further, a ventilation channel is provided between the protrusions.

[0006] Further, a sealing groove is provided on the side of the fixing plate facing the heat sink corresponding to the outer ring of each through hole, and a sealing ring is installed in the sealing groove.

[0007] Further, thermal paste is injected between the heat sink and the frequency converter in the through hole.

[0008] Compared with the prior art, the utility model has the following advantages: By setting the heat sink into a locally convex shape and having a heat dissipation gap between the heat sink and the frequency converter, a ventilation channel is formed. The convex part is in close contact with the main power components on the frequency converter, thereby increasing the heat dissipation effect of the heat sink, reducing the usage amount of thermal paste at the same time, and reducing the cost while improving the heat dissipation effect. Description of the Drawings

[0009] Figure 1is a three-dimensional schematic diagram of the present utility model;

[0010] Figure 2 is a top view of the present utility model;

[0011] Figure 3 is Figure 2 the A-A view of

[0012] Figure 4 is a structural schematic diagram of the fixing plate of the present utility model;

[0013] Figure 5 is a structural schematic diagram of the heat sink of the present utility model;

[0014] In the figure: 1. Cover body; 2. Protrusion; 3. Heat sink; 4. Support pillar; 5. Fixing plate; 6. Through hole; 7. Ventilation channel. Specific embodiments

[0015] See Figures 1-5 , this embodiment is a frequency converter box with a strengthened heat dissipation structure, including a fixing plate 5, a heat sink 3 and a cover body 1. The fixing plate 5 is used to install the frequency converter, and the cover body 1 is arranged on one side of the fixing plate 5 to cover the frequency converter. A through hole 6 is provided on the fixing plate 5 corresponding to the main power components (the main power components are usually IGBTs and rectifier bridges) on the frequency converter. The heat sink 3 is arranged on the other side of the fixing plate 5. A protrusion 2 is provided on the side of the heat sink 3 facing the through hole 6. The protrusion 2 is formed by bending, and the shape of the protrusion 2 matches the corresponding through hole 6. The other side of the heat sink 3 is exposed outward. A plurality of support pillars 4 are provided between the heat sink 3 and the fixing plate 5 so that there is a ventilation gap between the heat sink 3 and the fixing plate 5. The fixing plate 5 is made of plastic material, which plays a certain insulating role.

[0016] Further, a ventilation channel 7 is provided between the protrusions 2.

[0017] Further, a sealing groove is provided on the side of the fixing plate 5 facing the heat sink 3 corresponding to the outer ring of each through hole 6. A sealing ring is installed in the sealing groove. A heat-conducting glue is injected between the heat sink 3 and the frequency converter in the through hole 6. The function of the sealing ring is to facilitate avoiding leakage during the application of glue in the through hole 6 and reduce the amount of heat-conducting glue used.

[0018] In the present utility model, a protrusion 2 is provided on the heat sink 3 corresponding to the main power element, making it closer to the main power element and more conducive to heat dissipation. At the same time, by providing a ventilation gap and a ventilation channel 7, both sides of the heat sink 3 are in contact with the outside air. During operation, usually a cooling fan is installed at the frequency converter. Due to the provision of the ventilation channel 7, the heat dissipation effect is greatly improved. And when air enters the relatively narrow ventilation channel 7 from the larger ventilation opening on the outside, due to the reason of fluid dynamics, the air flow velocity in the channel increases, thereby improving the heat dissipation effect of the protrusions 2 on both sides of the channel.

Claims

1. A frequency converter box with enhanced heat dissipation structure, characterized by: It includes a fixing plate, a heat sink and a cover body. The fixing plate is used to install the inverter. The cover body is arranged on one side of the fixing plate to cover the inverter. A through hole is arranged on the fixing plate corresponding to the main power element on the inverter. The heat sink is arranged on the other side of the fixing plate. A protrusion is arranged on the side of the heat sink facing the through hole. The shape of the protrusion matches the corresponding through hole. The other side of the heat sink is exposed to the outside. A plurality of pillars are arranged between the heat sink and the fixing plate so that there is a ventilation gap between the heat sink and the fixing plate.

2. The inverter box with enhanced heat dissipation structure according to claim 1 is characterized in that: A ventilation channel is provided between the protrusions.

3. The inverter box with enhanced heat dissipation structure according to claim 1 is characterized in that: A sealing groove is arranged on the outer circle of one side of the fixing plate facing the heat sink and corresponding to each through hole, and a sealing ring is arranged in the sealing groove.

4. The inverter box with enhanced heat dissipation structure according to claim 1 is characterized in that: Heat-conducting glue is injected in the through hole between the heat sink and the frequency converter.

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