CN222073489U

CN222073489U - Electronic control devices and HVAC equipment

Info

Publication number: CN222073489U
Application number: CN202420233000.5U
Authority: CN
Inventors: 刘国峰; 吴瑞; 吴田; 张成功
Original assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Current assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2024-01-30
Filing date: 2024-01-30
Publication date: 2024-11-26
Anticipated expiration: 2034-01-30

Abstract

The utility model discloses an electric control device and heating and ventilation equipment, comprising: a main radiator; the circuit board is arranged in the main radiator and is connected with the main radiator; the power module assembly is arranged between the circuit board and the main radiator and is connected with the circuit board and the main radiator, the power module assembly is a plurality of spaced-apart power module assemblies and comprises a first power module assembly, the first power module assembly comprises an auxiliary radiator, a first power module and a first plastic part, the first power module is spaced-apart from the circuit board, pins are welded with the circuit board, the auxiliary radiator is arranged between the first power module and the main radiator, the first power module is connected with the auxiliary radiator, the auxiliary radiator is connected with the main radiator, and the first plastic part is arranged between the auxiliary radiator and the circuit board and is connected with the auxiliary radiator and the circuit board. According to the electric control device, the welding quality and reliability between the first power module and the circuit board are high, the production efficiency is high, and the installation flatness is high.

Description

Electric control device and heating ventilation equipment

Technical Field

The utility model relates to the technical field of electric control devices, in particular to an electric control device and heating ventilation equipment.

Background

The power module is widely applied to control of motors such as an air conditioner compressor and a fan, a plurality of power modules exist on one circuit board under the current trend of high integration, and the height tolerance of part of the power modules is larger or the heights of different factories are different, so that higher requirements are put forward on the installation of the circuit board, namely the installation flatness of the power modules. The traditional power module mounting mode is that the power module is fixed on the radiator through a screw, and then the power module is welded manually to ensure the mounting flatness of the device, but the mounting mode has low production efficiency and poor reliability of non-wave soldering.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the electric control device which can ensure the welding quality and reliability between the first power module and the circuit board, improve the production efficiency and has high installation flatness.

The utility model also provides heating and ventilation equipment which comprises the electric control device.

An electronic control device according to an embodiment of the present utility model includes: a main radiator; the circuit board is connected with the main radiator; the power module assembly is arranged between the circuit board and the main radiator and is connected with the circuit board and the main radiator, the power module assembly is a plurality of power module assemblies which are spaced apart and comprises a first power module assembly, the first power module assembly comprises an auxiliary radiator, a first power module and a first plastic part, the first power module is spaced apart from the circuit board and is welded with the circuit board, the auxiliary radiator is arranged between the first power module and the main radiator, the first power module is connected with the auxiliary radiator, the auxiliary radiator is connected with the main radiator, and the first plastic part is arranged between the auxiliary radiator and the circuit board and is connected with the auxiliary radiator and the circuit board.

According to the electric control device provided by the embodiment of the utility model, the parts of the power module assemblies in the electric control device are designed to be the first power module assemblies, the first power module assemblies comprise the auxiliary radiator, the first power module and the first plastic part, the first power module is spaced apart from the circuit board and the pins are connected with the circuit board in a welding way, the auxiliary radiator is positioned between the first power module and the main radiator, the first power module is connected with the auxiliary radiator, the auxiliary radiator is connected with the main radiator, the first plastic part is arranged between the auxiliary radiator and the circuit board and is connected with the auxiliary radiator and the circuit board, the assembled first power module assemblies are integrally subjected to wave soldering, the welding quality and reliability between the first power module and the circuit board can be ensured, meanwhile, the production efficiency is improved, the larger tolerance of the first power module can be compensated through the precise tolerance of the first plastic part and the clearance between the first power module and the circuit board, the first power module of different manufacturers can be compatible, and the installation flatness can be ensured.

According to some embodiments of the utility model, the height tolerance of the first power module is ±h, h > 0, the distance between the first power module and the circuit board is a, and the following is satisfied: a is more than or equal to h.

According to some embodiments of the utility model, the first power module is connected to the secondary heat sink by fasteners.

According to some embodiments of the utility model, the circuit board, the first plastic part and the auxiliary radiator are sequentially connected through fasteners.

According to some embodiments of the utility model, the secondary heat sink and the primary heat sink are connected by fasteners.

According to some embodiments of the utility model, the first plastic part is a plurality of plastic parts, and the plurality of first plastic parts are arranged at intervals along the circumferential direction of the first power module.

According to some embodiments of the utility model, the plurality of power module assemblies further comprises a second power module assembly, the second power module assembly comprises a second power module and a second plastic piece, the second power module is located between the main radiator and the circuit board, pins of the second power module are located on a peripheral wall of the second power module and are welded with the circuit board, the second plastic piece is located between the second power module and the circuit board, and the second power module is connected with the main radiator.

In some embodiments of the utility model, the second power module is connected to the primary heat sink by fasteners.

In some embodiments of the present utility model, the circuit board and the main heat sink are connected by a fastener, a minimum distance between a pin of the second power module and the fastener between the circuit board and the main heat sink is b1, a combined height tolerance of the second power module assembly is ±h1, h1 > 0, a height tolerance of the main heat sink at the fastener is ±h2, h2 > 0, and the following is satisfied: (h1+h2)/b 1 is less than 0.75 percent.

According to some embodiments of the utility model, the circuit board and the main heat sink are connected by a fastener, a minimum distance between a pin of the first power module and the fastener between the circuit board and the main heat sink is b2, a combined height tolerance of the first power module assembly is ±h3, h3 > 0, a height tolerance of the main heat sink at the fastener is ±h2, h2 > 0, and the following is satisfied: (h3+h2)/b 2 is less than 0.75 percent.

The heating and ventilation equipment comprises the electric control device.

According to the heating ventilation equipment provided by the embodiment of the utility model, by arranging the electric control device, part of the power module assemblies in the electric control device is set to be the first power module assembly, the first power module assembly comprises the auxiliary radiator, the first power module and the first plastic part, the first power module is spaced apart from the circuit board, the pins are connected with the circuit board in a welding way, the auxiliary radiator is positioned between the first power module and the main radiator, the first power module is connected with the auxiliary radiator, the auxiliary radiator is connected with the main radiator, the first plastic part is arranged between the auxiliary radiator and the circuit board and is connected with the auxiliary radiator and the circuit board, so that the assembled first power module assembly is integrally subjected to wave soldering, the welding quality and reliability between the first power module and the circuit board can be ensured, the production efficiency is improved, the tolerance of the first power module can be compensated by the accurate tolerance of the first plastic part and the clearance between the first power module and the circuit board, different first power modules can be compatible, and the installation flatness can be ensured.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

Fig. 1 is a schematic diagram of a first power module assembly of an electronic control device according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a second power module assembly of an electronic control device according to an embodiment of the present utility model;

fig. 3 is a schematic view of an electronic control device according to an embodiment of the present utility model.

Reference numerals:

100. An electric control device;

1. a main radiator;

2. a circuit board;

3. A power module assembly; 31. a first power module assembly; 311. a sub-radiator; 312. a first power module; 313. a first plastic part; 32. a second power module assembly; 321. a second power module; 322. and a second plastic part.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

An electronic control apparatus 100 according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1 and 3, an electronic control device 100 according to an embodiment of the present utility model includes a main heat sink 1, a circuit board 2, and a power module assembly 3.

Specifically, as shown in fig. 3, the main radiator 1 is used for radiating heat for the electronic control device 100, and the main radiator 1 is generally made of a metal material with high heat conductivity. The main radiator 1 may be a closed box structure, the circuit board 2 is disposed in the main radiator 1 and connected with the main radiator 1, and the circuit board 2 is disposed in the closed main radiator 1, so as to protect the circuit board 2 and components on the circuit board 2, and avoid damage to an electric control system of the electric control device 100 in a severe working environment, such as a high-temperature and high-humidity environment or a harmful gas environment, such as a sea, a steel plant, a farm, etc.

As shown in fig. 3, the power module assembly 3 is disposed between the circuit board 2 and the main radiator 1 and connected with the circuit board 2 and the main radiator 1, and the power module assembly 3 is connected with the main radiator 1, so that the power module assembly 3 is attached to the main radiator 1, and heat generated in the working process of the power module assembly 3 can be conducted to the main radiator 1, and the heat is dissipated through the main radiator 1, so that the heat dissipation and the temperature reduction of the power module assembly 3 are realized.

It is understood that the connection of the power module assembly 3 to the circuit board 2 means that the pins of the power module assembly 3 are connected to the circuit board 2.

As shown in fig. 1 and 3, the power module assemblies 3 are multiple and spaced apart, so that different requirements of the electric control device 100 can be met, and functions which can be realized by an electric control system of the electric control device 100 are more diversified. The plurality of power module assemblies 3 includes a first power module assembly 31, wherein the number of first power module assemblies 31 may be one or more.

Specifically, as shown in fig. 1, the first power module assembly 31 includes a sub-radiator 311, a first power module 312, and a first plastic member 313, the first power module 312 is spaced apart from the circuit board 2 and the pins are welded to the circuit board 2, the sub-radiator 311 is located between the first power module 312 and the main radiator 1, the first power module 312 is connected to the sub-radiator 311, the sub-radiator 311 is connected to the main radiator 1, and the first plastic member 313 is located between the sub-radiator 311 and the circuit board 2 and is connected to the sub-radiator 311 and the circuit board 2.

In the process of assembling the first power module assembly 31, the first power module 312 is fixed on the auxiliary radiator 311, then the auxiliary radiator 311 and the circuit board 2 are placed at intervals, the first power module 312 is located between the auxiliary radiator 311 and the circuit board 2, a first plastic piece 313 is placed between the auxiliary radiator 311 and the circuit board 2 and used for supporting the auxiliary radiator 311 and the circuit board 2, the first power module 312 and the circuit board 2 are arranged at intervals, then the auxiliary radiator 311, the first plastic piece 313 and the circuit board 2 are connected, and the assembled first power module assembly 31 is placed into wave soldering equipment to be integrally wave soldering so that pins of the first power module 312 are connected with the circuit board 2.

In the present utility model, since the entire first power module assembly 31 is soldered by wave soldering using wave soldering equipment, the soldering quality and reliability between the first power module 312 and the circuit board 2 can be ensured while the production efficiency is high. In addition, since the tolerance of the first plastic member 313 is small, the first power module 312 and the circuit board 2 are spaced apart by the first plastic member 313, and the large tolerance of the first power module 312 can be compensated by the precise tolerance of the first plastic member 313 and the gap between the first power module 312 and the circuit board 2, thereby ensuring the mounting flatness. When the heights of the first power modules 312 are different due to different manufacturers, the first power modules 312 can be absorbed through the gap between the first power modules 312 and the circuit board 2 to ensure consistency.

According to the electric control device 100 of the embodiment of the utility model, by setting the parts of the plurality of power module assemblies 3 in the electric control device 100 as the first power module assembly 31, the first power module assembly 31 comprises the auxiliary radiator 311, the first power module 312 and the first plastic part 313, the first power module 312 is spaced apart from the circuit board 2, the pins are connected with the circuit board 2 in a welding way, the auxiliary radiator 311 is positioned between the first power module 312 and the main radiator 1, the first power module 312 is connected with the auxiliary radiator 311, the auxiliary radiator 311 is connected with the main radiator 1, the first plastic part 313 is arranged between the auxiliary radiator 311 and the circuit board 2 and is connected with the auxiliary radiator 311 and the circuit board 2, the assembled first power module assembly 31 is integrally subjected to wave soldering, the welding quality and reliability between the first power module 312 and the circuit board 2 can be ensured, meanwhile, the production efficiency is improved, the larger tolerance of the first power module 312 can be compensated through the tolerance of the first plastic part 313 and the clearance between the first power module 312 and the circuit board 2, and the compatibility of the first power module 312 can be ensured by different manufacturers.

In some embodiments of the present utility model, as shown in fig. 1, the height tolerance of the first power module 312 is ±h, h > 0, the distance between the first power module 312 and the circuit board 2 is a, and the following is satisfied: a is more than or equal to h. This allows a greater tolerance of the first power module 312 to be better compensated by the gap between the first power module 312 and the circuit board 2, ensuring the flatness of the mounting. When the heights of the first power modules 312 are different due to the production of different manufacturers, the gaps between the first power modules 312 and the circuit board 2 can be used for ensuring the absorption consistency, so that the circuit board 2 is jacked up when the heights of the first power modules 312 are higher due to the fact that the distance between the first power modules 312 and the circuit board 2 is too small, and the flatness of the circuit board 2 is ensured.

In some embodiments of the present utility model, as shown in fig. 1, the first power module 312 is connected with the sub heat sink 311 by a fastener. Thereby facilitating connection between the first power module 312 and the sub heat sink 311, and ensuring reliability of connection between the first power module 312 and the sub heat sink 311.

Alternatively, the first power module 312 is connected with the sub-radiator 311 by a plurality of fasteners that are spaced apart in the circumferential direction of the first power module 312. Further, a first mounting leg is provided on a peripheral wall of the first power module 312, and the first mounting leg is connected to the sub-radiator 311 by a fastener.

In some embodiments of the present utility model, as shown in fig. 1, the circuit board 2, the first plastic member 313 and the sub-heat sink 311 are sequentially coupled by fasteners. It will be appreciated that the circuit board 2, the first plastic member 313 and the sub-heat sink 311 are connected by the same fastener at the same connection position. For example, in the example shown in fig. 1, a fastener is sequentially provided on the circuit board 2, the first plastic member 313, and the sub-heat sink 311 and connected to the sub-heat sink 311. The connection mode of the circuit board 2, the first plastic part 313 and the auxiliary radiator 311 is simple and reliable.

Alternatively, the circuit board 2, the first plastic member 313 and the sub heat sink 311 are connected by a plurality of fasteners, which are spaced apart in the circumferential direction of the first power module 312.

In some embodiments of the present utility model, as shown in fig. 3, the sub-radiator 311 and the main radiator 1 are connected by a fastener. After the first power module assembly 31 is assembled on the circuit board 2, the installation of the first power module assembly 31 is achieved while securing the sub-radiator 311 to the main radiator 1 by fasteners, ensuring flatness. In the present utility model, the height dimension of the first power module assembly 31 is ensured by the first plastic member 313 and the sub heat sink 311 integrally, and when there is a small tolerance, the fastening member connecting the first plastic member 313 and the circuit board 2 locally stresses the circuit board 2 instead of the pins of the first power module 312 or the ceramic copper substrate of the first power module 312, thereby ensuring the reliability of the first power module 312.

Alternatively, the main radiator 1 and the sub radiator 311 are connected by a plurality of fasteners, which are spaced apart in the circumferential direction of the sub radiator 311.

In some embodiments of the present utility model, as shown in fig. 1, the first plastic member 313 is a plurality of first plastic members 313, and the plurality of first plastic members 313 are disposed at intervals along the circumferential direction of the first power module 312. Thereby, the supporting effect of the auxiliary radiator 311 and the circuit board 2 can be ensured, and the distance between the circuit board 2 and the auxiliary radiator 311 is ensured to be consistent, thereby being beneficial to ensuring the planeness of the circuit board 2.

In addition, when the first plastic member 313 is plural, the number of fasteners for connecting the circuit board 2, the first plastic member 313, and the sub-heat sink 311 is plural.

Alternatively, the cross-section of the first plastic member 313 is circular, that is, the first plastic member 313 has a cylindrical structure, however, the cross-section of the first plastic member 313 may have other shapes such as triangle, square, etc., which is not limited herein.

In some embodiments of the present utility model, as illustrated in fig. 1, the pins of the first power module 312 are located on a side surface of the first power module 312 facing the circuit board 2, and of course, the present utility model is not limited thereto, and the pins of the first power module 312 may also be located on a peripheral wall of the first power module 312.

In some embodiments of the present utility model, as shown in fig. 2 and 3, the plurality of power module assemblies 3 further includes a second power module assembly 32, wherein the number of second power module assemblies 32 may be one or more. Specifically, as shown in fig. 2, the second power module assembly 32 includes a second power module 321 and a second plastic part 322, the second power module 321 is located between the main radiator 1 and the circuit board 2, pins of the second power module 321 are located on a peripheral wall of the second power module 321 and are welded with the circuit board 2, the second plastic part 322 is located between the second power module 321 and the circuit board 2, and the second power module 321 is connected with the main radiator 1.

In the process of assembling the second power module assembly 32, the second plastic piece 322 is arranged between the second power module 321 and the circuit board 2, and the larger tolerance of the second power module 321 can be compensated through the precise tolerance of the second plastic piece 322, so that the height of the second power module 321 is ensured, and then the whole power module assembly is subjected to wave soldering, so that the pins of the second power module 321 are in welded connection with the circuit board 2, and the mounting flatness is ensured.

In the present utility model, since the entire second power module assembly 32 is soldered by wave soldering using wave soldering equipment, the soldering quality and reliability between the second power module 321 and the circuit board 2 can be ensured while the production efficiency is high. In addition, since the tolerance of the second plastic member 322 is small, the larger tolerance of the second power module 321 is compensated by the accurate tolerance of the second plastic member 322, and the mounting flatness is ensured.

In some embodiments of the present utility model, as shown in fig. 3, the second power module 321 is connected to the main heat sink 1 by a fastener. The connection between the second power module 321 and the main heat sink 1 can be simplified and the reliability of the connection between the second power module 321 and the main heat sink 1 can be ensured. In the present utility model, after the second power module assembly 32 is assembled on the circuit board 2, the second power module assembly 32 is mounted while ensuring flatness by fastening the second power module 321 to the main radiator 1 by fasteners.

Alternatively, the fasteners for connecting the second power module 321 with the main heat sink 1 may be plural.

In some embodiments of the present utility model, as shown in fig. 3, the circuit board 2 and the main heat sink 1 are connected by a fastener, the minimum distance between the pins of the second power module 321 and the fastener between the circuit board 2 and the main heat sink 1 is b1, the combined height tolerance of the second power module assembly 32 is ±h1 (the combined tolerance in the height range at M as shown in fig. 3), h1 > 0, the height tolerance of the main heat sink 1 at the fastener is ±h2 (the combined tolerance in the height range at N as shown in fig. 3), h2 > 0, and the following are satisfied: (h1+h2)/b 1 is less than 0.75 percent. Therefore, the minimum distance between the pin of the second power module 321 and the fastening piece between the circuit board 2 and the main radiator 1 can be ensured to be b1 larger, and the situation that the circuit board 2 and the main radiator 1 are connected to enable the circuit board 2 to deform more and the pin of the second power module 321 is stressed more when the second power module assembly 32 has larger tolerance due to the fact that the minimum distance between the pin of the second power module 321 and the fastening piece between the circuit board 2 and the main radiator 1 is smaller b1 is avoided.

In some embodiments of the present utility model, the circuit board 2 and the main heat sink 1 are connected by fasteners, the minimum distance between the pins of the first power module 312 and the fasteners between the circuit board 2 and the main heat sink 1 is b2, the combined height tolerance of the first power module assembly 31 is ±h3, h3 > 0, the height tolerance of the main heat sink 1 at the fasteners is ±h2, h2 > 0, and the following is satisfied: (h3+h2)/b 2 is less than 0.75 percent. It is thereby ensured that the minimum distance between the pins of the first power module 312 and the fastening members between the circuit board 2 and the main heat sink 1 is b2 is larger, and it is avoided that the circuit board 2 and the main heat sink 1 are connected such that the circuit board 2 is deformed more and the pins of the first power module 312 are stressed more when the first power module assembly 31 has a larger tolerance due to the fact that the minimum distance between the pins of the first power module 312 and the fastening members between the circuit board 2 and the main heat sink 1 is b2 is smaller.

Optionally, the circuit board 2 is connected with the main radiator 1 through a fastener, and further, a support column is arranged on the main radiator 1, and the circuit board 2 is propped against the support column and is connected with the support column through the fastener.

In some embodiments of the present utility model, the main radiator 1 includes a radiator case, one side of which is open, and a radiator cover (not shown), the circuit board 2 is disposed in the radiator case and connected thereto, and the power module assembly 3 is disposed on the side of the circuit board 2 facing away from the open side of the radiator case. The radiator cover is connected with the radiator shell and is used for blocking an open mouth of the radiator shell. The radiator shell and the radiator cover form a closed environment together, so that the working reliability of the circuit board 2 and the power module assembly 3 on the circuit board 2 is ensured, and meanwhile, the radiator cover is connected with the radiator shell, so that the circuit board 2 is convenient to install in the main radiator 1. Further, the removable connection of the heat sink cover to the heat sink housing, such as by fasteners, may facilitate servicing of the circuit board 2 and the power module assembly 3 on the circuit board 2.

A heating and ventilation apparatus according to an embodiment of the present utility model is described below.

The heating and ventilation device according to the embodiment of the utility model comprises the electric control device 100. The heating and ventilation device can be an air conditioner, a heat pump and the like, and is not limited herein.

According to the heating ventilation device of the embodiment of the utility model, by arranging the electric control device 100, the parts of the plurality of power module assemblies 3 in the electric control device 100 are set to be the first power module assemblies 31, the first power module assemblies 31 comprise the auxiliary radiator 311, the first power module 312 and the first plastic part 313, the first power module 312 is spaced apart from the circuit board 2, the pins are connected with the circuit board 2 in a welding way, the auxiliary radiator 311 is positioned between the first power module 312 and the main radiator 1, the first power module 312 is connected with the auxiliary radiator 311, the auxiliary radiator 311 is connected with the main radiator 1, the first plastic part 313 is arranged between the auxiliary radiator 311 and the circuit board 2 and is connected with the auxiliary radiator 311 and the circuit board 2, the assembled first power module assemblies 31 are integrally subjected to wave soldering, the welding quality and reliability between the first power module 312 and the circuit board 2 can be ensured, meanwhile, the production efficiency can be improved, the tolerance of the first power module 312 and the circuit board 2 can be compensated for larger tolerance of the first power module 312 through the precision of the first plastic part 313 and the clearance between the first power module 312 and the circuit board 2, and the first power module 312 can be ensured to be compatible with different factories.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. An electronic control device, comprising:

A main radiator;

The circuit board is connected with the main radiator;

A power module assembly disposed between and connected to the circuit board and the main heat sink, the power module assembly being a plurality of spaced apart power module assemblies and including a first power module assembly,

The first power module assembly comprises an auxiliary radiator, a first power module and a first plastic part, wherein the first power module is spaced apart from the circuit board, pins are connected with the circuit board in a welded mode, the auxiliary radiator is located between the first power module and the main radiator, the first power module is connected with the auxiliary radiator, the auxiliary radiator is connected with the main radiator, and the first plastic part is arranged between the auxiliary radiator and the circuit board and connected with the auxiliary radiator and the circuit board.

2. The electronic control of claim 1, wherein the height tolerance of the first power module is ± h, h > 0, the distance between the first power module and the circuit board is a, and: a is more than or equal to h.

3. The electronic control device of claim 1, wherein the first power module is connected to the secondary heat sink by a fastener.

4. The electronic control device of claim 1, wherein the circuit board, the first plastic member, and the secondary heat sink are sequentially connected by fasteners.

5. The electronic control of claim 1, wherein the secondary heat sink and the primary heat sink are connected by fasteners.

6. The electronic control device of claim 1, wherein the first plastic parts are a plurality of the first plastic parts, and the plurality of the first plastic parts are arranged at intervals along the circumferential direction of the first power module.

7. The electronic control device of claim 1, wherein the plurality of power module assemblies further comprises a second power module assembly comprising a second power module and a second plastic piece, the second power module being positioned between the main heat sink and the circuit board, pins of the second power module being positioned on a peripheral wall of the second power module and in welded connection with the circuit board, the second plastic piece being positioned between the second power module and the circuit board, the second power module being connected with the main heat sink.

8. The electronic control of claim 7, wherein the second power module is connected to the main heat sink by fasteners.

9. The electronic control of claim 7, wherein the circuit board and the main heat sink are connected by a fastener, a minimum distance between a pin of the second power module and the fastener between the circuit board and the main heat sink is b1, a combined height tolerance of the second power module assembly is ±h1, h1 > 0, a height tolerance of the main heat sink at the fastener is ±h2, h2 > 0, and the following: (h1+h2)/b 1 is less than 0.75 percent.

10. The electronic control device of claim 1, wherein the circuit board and the main heat sink are connected by a fastener, a minimum distance between a pin of the first power module and the fastener between the circuit board and the main heat sink is b2, a combined height tolerance of the first power module assembly is ± h3, h3 > 0, a height tolerance of the main heat sink at the fastener is ± h2, h2 > 0, and: (h3+h2)/b 2 is less than 0.75 percent.

11. A heating and ventilation device comprising an electrical control device according to any one of claims 1-10.