Air cooling heat dissipation device and vehicle air conditioner

Abstract

The utility model discloses an air-cooled heat dissipation device which comprises a heat dissipation shell and a heat dissipation fan, a plurality of fan cavity seats are arranged at the bottom of the heat dissipation shell, the heat dissipation fan is detachably installed in the fan cavity seats, the air-cooled heat dissipation device further comprises an air guide cover, and the air guide cover is detachably installed on the side face of the heat dissipation shell. An air guide cavity for heat dissipation air to flow is formed between the air guide cover and the heat dissipation shell; the utility model further discloses a vehicle air conditioner, and the air cooling heat dissipation device is installed on the vehicle air conditioner. According to the utility model, the wind scooper is additionally arranged on the air-cooled heat dissipation device, so that the wind dissipation condition in a heat dissipation wind field is avoided, and the heat dissipation efficiency is improved; the wind scooper is arranged so that cooling airflow generated by the cooling fan can be conducted to the periphery of the heating element more evenly, heat resistance caused by uneven local airflow is avoided, and the heat exchange effect is improved.

Description

Technical Field

[0001] This utility model belongs to the field of rail vehicle technology, specifically, it relates to an air-cooled heat dissipation device and a vehicle air conditioner. Background Technology

[0002] In existing vehicle air conditioning inverter devices, single-unit radiators are often used. However, due to the different power and temperature rise of the power modules of different power devices, the heat dissipation capacity of some heat dissipation devices cannot be fully utilized, while the heat dissipation capacity of others has reached its limit or even exceeded the threshold. This reduces the heat dissipation efficiency of the radiator, which in turn reduces the heat dissipation effect of the power module of the air conditioning inverter. In severe cases, it can affect the normal operation of the air conditioning inverter device.

[0003] In view of the above, this utility model is hereby proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology. In view of the problem that the existing air conditioner inverter is a single heat sink, the heat sink has poor temperature uniformity and heat conduction and heat dissipation effect. This utility model provides an air-cooled heat dissipation device.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] A wind-cooled heat dissipation device includes a heat dissipation shell and a heat dissipation fan. The bottom of the heat dissipation shell is provided with a plurality of fan cavity seats. The heat dissipation fan is detachably installed in the fan cavity seats. The device also includes an air guide shroud, which is detachably installed on the side of the heat dissipation shell, and an air guide cavity for the flow of heat dissipation air is formed between the air guide shroud and the heat dissipation shell.

[0007] As a further technical solution of this application, the heat dissipation housing includes an air inlet and an air outlet. The air outlet is located above the air inlet, a cooling fan is provided at the air inlet, and heat dissipation fins are provided at the air outlet inside the air guide cavity.

[0008] As a further technical solution of this application, the heat dissipation fins are detachably connected to the heat dissipation housing, and multiple heat dissipation fins are provided.

[0009] As a further technical solution of this application, the heat dissipation fins include any one or more of the following: straight fins, corrugated fins, serrated fins, and needle-shaped fins.

[0010] As a further technical solution of this application, the heat dissipation housing also includes a substrate, on which a heating element is detachably disposed, and a heat-conducting layer for heat transfer is disposed between the heating element and the heat dissipation housing.

[0011] As a further technical solution of this application, the heat dissipation housing is an integral structure.

[0012] As a further technical solution of this application, the number of fan housings and cooling fans are the same, and multiple fan housings and cooling fans are provided.

[0013] As a further technical solution of this application, the top of the air guide shroud is connected to the heat dissipation shell, the bottom of the air guide shroud is connected to the fan cavity seat, and the cross-section of the air guide shroud is a wide opening that is narrow at the top and wide at the bottom, which can guide the airflow generated by the cooling fan to the heat dissipation fins for cooling.

[0014] As a further technical solution of this application, a temperature control switch for monitoring the temperature of the heating element is also provided on the heat sink housing. The temperature control switch is located on the outer wall of the heat sink housing. The temperature control switch is electrically connected to the cooling fan, and the operation of the cooling fan is controlled by the temperature of the heating element monitored by the temperature control switch.

[0015] This utility model also discloses a vehicle air conditioner, on which any of the above-mentioned air-cooling heat dissipation devices are installed.

[0016] By adopting the above technical solution, this utility model has the following beneficial technical effects compared with the prior art:

[0017] The technical solution of this utility model improves heat dissipation efficiency by adding an air guide shroud to the air-cooled heat dissipation device to avoid air scattering in the heat dissipation air field. In addition, it can also make the cooling airflow generated by the cooling fan more evenly conduct to the area around the heat-generating element on the upper part of the heat dissipation shell, avoid thermal resistance caused by uneven local airflow, and improve the heat exchange effect.

[0018] Compared to multiple individual heat sinks, the integrated heat dissipation structure saves installation space; within the same space, the number of heat dissipation fins and cooling fans is increased, thereby increasing the heat dissipation area and improving the heat dissipation capacity.

[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0021] In the attached diagram:

[0022] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0023] Figure 2 This is a front view schematic diagram of the present invention;

[0024] Figure 3 This is a side view of the present invention;

[0025] Figure 4 This is a schematic diagram of the heat dissipation fins in this utility model.

[0026] Icons: 1. Heat sink housing; 2. Fan housing mount; 3. Heat sink fan; 4. Base plate; 5. Air guide shroud; 51. Upper cover; 52. Lower cover; 6. Temperature control switch; 7. Air guide cavity; 8. Heat sink fins.

[0027] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In existing vehicle air conditioning inverter devices, single-unit radiators are often used for heat dissipation. However, due to the different power and temperature rise of the power modules of different power devices, the heat dissipation capacity of some radiators cannot be fully utilized, while the heat dissipation capacity of others has reached its limit or even exceeded the threshold. This reduces the heat dissipation efficiency of the radiator, which in turn leads to a poorer heat dissipation effect of the power module of the air conditioning inverter. In severe cases, it can affect the normal operation of the air conditioning inverter.

[0032] As attached Figure 1-3 As shown, this utility model provides an air-cooled heat dissipation device, including a heat dissipation housing 1 and a heat dissipation fan 3. The bottom of the heat dissipation housing 1 is provided with a plurality of fan cavity seats 2. The heat dissipation fan 3 is detachably installed in the fan cavity seats 2. It also includes an air guide shroud 5, which is detachably installed on the side of the heat dissipation housing 1, and an air guide cavity 7 for the flow of heat dissipation air is formed between the air guide shroud 5 and the heat dissipation housing 1.

[0033] This application applies an air-cooled heat dissipation device to the air conditioning system of a rail vehicle. Heat is transferred from the heat-generating element to the cooling fan 3 via heat conduction and convection, and the airflow generated by the cooling fan 3 dissipates the heat into the surrounding environment. Compared to liquid cooling or other types of heat dissipation solutions, air cooling is more economical, and the air-cooled heat dissipation system has a relatively simple structure and is easy to maintain.

[0034] In this embodiment, an additional air guide shroud 5 is provided on the air-cooled heat dissipation device, which can prevent air scattering in the heat dissipation air field and improve heat dissipation efficiency; in addition, it can make the cooling airflow generated by the cooling fan 3 more evenly conduct to the upper part of the heat dissipation shell 1, avoid thermal resistance caused by uneven local airflow, and improve heat exchange effect.

[0035] Furthermore, the heat dissipation housing 1 includes a substrate 4, on which a heating element is detachably disposed, and a heat-conducting layer for heat transfer is disposed between the heating element and the heat dissipation housing 1.

[0036] Specifically, the heating element is a power module, and heat is transferred from the power module to the substrate 4 via a thermally conductive layer. This thermally conductive layer is a thermally conductive material layer that reduces thermal resistance and significantly improves heat dissipation efficiency. Preferably, the thermally conductive layer is a thermally conductive silicone grease layer. The thermally conductive silicone grease layer is used to fill the space between the heating element and the substrate 4, reducing thermal resistance, ensuring good thermal contact between the two, and improving heat dissipation efficiency.

[0037] As a further embodiment of this application, the heat dissipation housing 1 includes an air inlet and an air outlet, with the air outlet located above the air inlet. A cooling fan 3 is installed at the air inlet, and heat dissipation fins 8 are installed at the air outlet within the air guide cavity 7. The heat dissipation fins 8 are detachably connected to the inner wall of the substrate 4 via a connecting structure.

[0038] The heat dissipation fins 8 are detachably connected to the heat dissipation housing 1, and multiple heat dissipation fins 8 are provided. It is understood that those skilled in the art can select the number of heat dissipation fins 8 according to the size of the space to be installed. Preferably, in this embodiment, 15 to 20 heat dissipation fins 8 are provided, which can give full play to the good cooling and heat dissipation effect.

[0039] As attached Figure 4 As shown, the heat dissipation fins 8 include a connecting central tube and outer fins. On one hand, the connecting central tube is connected to the substrate 4 via a detachable connector; on the other hand, the connecting central tube provides support for the outer fins.

[0040] Furthermore, the central tube and outer fins are typically hollow metal structures, increasing the surface area in contact with the airflow and thus improving heat exchange efficiency. In addition, the heat dissipation fins 8 are usually made of aluminum or copper. Both copper and aluminum have excellent thermal conductivity, making them ideal for directly contacting the heat source and absorbing energy from it, thereby achieving heat dissipation.

[0041] Furthermore, the heat dissipation fins 8 include any one or more of the following: straight fins, corrugated fins, serrated fins, and needle-shaped fins. Preferably, as shown in the attached diagram... Figure 4 As shown, the heat dissipation fins 8 in this embodiment are needle-shaped fins. By employing a slender, needle-like structure, the heat dissipation fins 8 significantly increase the surface area in contact with air, thereby improving heat dissipation efficiency. Compared to planar heat dissipation fins, needle-shaped heat dissipation fins can provide a larger heat dissipation area within the same volume, thus improving the heat dissipation effect.

[0042] As an embodiment of this application, a fan housing 2 is provided at the bottom of the heat dissipation housing 1. The fan housing 2 includes a bottom support plate and a wall plate. The bottom support plate is provided with a plurality of wall holes, and a wall plate of a certain height extends downward from the edge of each wall hole. A cooling fan 3 is detachably installed at the junction of the wall plate and the bottom support plate or on the wall plate to output airflow for air cooling.

[0043] In the above embodiments, the number of fan housing 2 and cooling fans 3 are the same, and multiple fan housing 2 and cooling fans 3 are provided. Each fan housing 2 is equipped with a corresponding cooling fan 3 for cooling. The specific number of fan housing 2 and cooling fans 3 can be selected by those skilled in the art according to actual needs. Preferably, there are 3 to 6 fan housing 2 and cooling fans 3.

[0044] Furthermore, the heat dissipation housing 1 (base plate and wall plate) is an integrated structure, which is simple, stable, and easy to install. Compared with a single heat dissipation radiator, the integrated heat dissipation housing 1 structure can increase the number of heat dissipation radiators in the same space, thereby increasing the heat dissipation area and improving the heat dissipation capacity.

[0045] Optionally, the wall hole in the above technical solution can be any one of square, circular, elliptical, or polygonal shapes, and those skilled in the art can choose according to specific needs. Preferably, the wall hole in this application is set as a square with rounded corners, which facilitates both the installation of the cooling fan 3 and the transmission of airflow.

[0046] As an embodiment of this application, the top of the air guide shroud 5 is connected to the heat dissipation housing 1, and the bottom of the air guide shroud 5 is connected to the fan cavity seat 2. The cross-section of the air guide shroud 5 is flared with a narrow top and a wide bottom, which can guide the airflow generated by the cooling fan 3 to diffuse towards the heat dissipation fins 8 for cooling.

[0047] It should be noted that the upper cover 51 of the air guide shroud 5 is connected to the base plate 4 of the heat dissipation housing 1, and the base plate 4 of the heat dissipation housing 1 is parallel to the upper cover 51 of the air guide shroud 5 and has a certain distance between them; the lower cover 52 of the air guide shroud 5 is an outwardly flared horn-shaped cover.

[0048] Furthermore, both the upper cover 51 and the lower cover 52 of the air guide shroud 5 are provided with mounting sides, and several mounting holes are provided on the mounting sides. By installing fixing parts in the mounting holes on the mounting sides, the air guide shroud 5 is connected and installed on the heat dissipation housing 1. The air guide shroud 5 is a U-shaped plate in general. After the air guide shroud 5 is fixed to the heat dissipation housing 1, it forms an internally hollow air guide cavity 7 for airflow.

[0049] Optionally, the upper cover 51 and lower cover 52 of the air guide shroud 5 can be an integral structure or a detachable connection structure. When the upper cover 51 and lower cover 52 are detachably connected, it can be achieved through any one of the following structures: threaded connection, plug-in connection, snap-fit ​​connection, or keyed connection. Preferably, the upper cover 51 and lower cover 52 are an integral structure, which has a simple and stable structural design, low cost, and convenient installation and maintenance.

[0050] During use, guided by the air guide shroud 5, the cold airflow generated by the cooling fan 3 can be conducted upwards to the heat dissipation fins 8, while the hot airflow from the power module is transferred to the substrate 4 via the heat-conducting layer, reaching the heat dissipation fins 8 for cooling. The hot and cold airflows converge and transfer heat at the heat dissipation fins 8, increasing the heat transfer time and improving the heat exchange efficiency. Furthermore, the air guide shroud 5 also serves to reduce noise, decreasing aerodynamic noise generated by the fan operation and noise from airflow, providing a relatively quiet operating environment. Simultaneously, the air guide shroud 5 also provides a layer of protection for the internal structure of the vehicle's air conditioning system, preventing external objects from entering and reducing damage caused by accidental collisions.

[0051] As a further embodiment of this application, a temperature control switch 6 for monitoring the temperature of the heating element is also provided on the heat dissipation housing 1, and the temperature control switch 6 is provided on the outer wall of the heat dissipation housing 1.

[0052] Furthermore, the temperature control switch 6 is electrically connected to the cooling fan 3, and the operation of the cooling fan 3 is controlled by the temperature of the heat-generating element monitored by the temperature control switch 6. The specific operation is as follows:

[0053] The temperature control switch 6 is located on the outer wall of the heat dissipation housing 1 near the heat-generating element. When the temperature control switch 6 detects that the temperature is greater than the first set temperature, the cooling fan 3 starts to run to accelerate the heat dissipation rate. When the temperature control switch 6 detects that the temperature is less than the second set temperature, the cooling fan 3 stops running.

[0054] The first set temperature range in the above technical solution is 50℃~60℃, preferably 55℃; the second set temperature range is 34℃~50℃, preferably 42℃.

[0055] This utility model also discloses a vehicle air conditioner, which is equipped with any of the aforementioned air-cooling devices. The installed air-cooling device can effectively dissipate heat from the heat-generating components in the vehicle while ensuring their efficient operation.

[0056] Compared with the prior art, the embodiments in this application have the following beneficial technical effects:

[0057] This application adds an air guide shroud 5 to the air-cooled heat dissipation device to avoid air scattering in the heat dissipation field and improve heat dissipation efficiency; in addition, it can also make the cooling airflow generated by the cooling fan 3 more evenly conduct to the heat dissipation fins 8 for effective heat conduction, avoid thermal resistance caused by uneven local airflow, and improve heat exchange effect.

[0058] Compared to multiple individual heat sinks, the integrated heat dissipation structure saves installation space; within the same space, the number of heat dissipation fins 8 and cooling fans 3 is increased, thereby increasing the heat dissipation area and improving the heat dissipation capacity.

[0059] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A wind-cooled heat dissipation device, comprising a heat dissipation housing and a cooling fan, wherein a plurality of fan cavity seats are provided at the bottom of the heat dissipation housing, and the cooling fan is detachably installed in the fan cavity seats, characterized in that: It also includes an air guide shroud, which is detachably mounted on the side of the heat dissipation housing, and an air guide cavity is formed between the air guide shroud and the heat dissipation housing for the flow of heat dissipation air.

2. The air-cooled heat dissipation device according to claim 1, characterized in that: The heat dissipation housing includes an air outlet located above the air inlet, a cooling fan installed at the air inlet, and heat dissipation fins installed near the air outlet in the air guide cavity.

3. The air-cooled heat dissipation device according to claim 2, characterized in that: The heat dissipation fins are detachably connected to the heat dissipation housing, and multiple heat dissipation fins are provided.

4. The air-cooled heat dissipation device according to claim 2 or 3, characterized in that: The heat dissipation fins include any one or more of the following: straight fins, corrugated fins, serrated fins, and needle-shaped fins.

5. The air-cooled heat dissipation device according to any one of claims 1-3, characterized in that: The heat dissipation housing also includes a substrate, on which a heating element is detachably disposed, and a heat-conducting layer for heat transfer is disposed between the heating element and the heat dissipation housing.

6. The air-cooled heat dissipation device according to claim 5, characterized in that: The heat dissipation housing is a one-piece structure.

7. The air-cooled heat dissipation device according to claim 1, characterized in that: The number of fan housings and cooling fans are the same, and multiple fan housings and cooling fans are provided.

8. The air-cooled heat dissipation device according to claim 1, characterized in that: The top of the air guide shroud is connected to the heat dissipation housing, and the bottom of the air guide shroud is connected to the fan cavity seat. The cross-section of the air guide shroud is flared, narrow at the top and wide at the bottom.

9. The air-cooled heat dissipation device according to any one of claims 1-3, characterized in that: The heat sink housing is also equipped with a temperature control switch for monitoring the temperature of the heating element. The temperature control switch is located on the outer wall of the heat sink housing and is electrically connected to the cooling fan.

10. A vehicle air conditioner, characterized in that: The vehicle air conditioner is equipped with the air-cooled heat dissipation device as described in any one of claims 1-9.

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