WO2021115369A1

WO2021115369A1 - Control box and fan assembly

Info

Publication number: WO2021115369A1
Application number: PCT/CN2020/135176
Authority: WO
Inventors: 金文彬; 童自然
Original assignee: 法雷奥汽车空调湖北有限公司
Priority date: 2019-12-12
Filing date: 2020-12-10
Publication date: 2021-06-17
Also published as: CN211641771U

Abstract

A control box (90) and a fan assembly (900). The control box (90) comprises a cover body (1), a circuit board assembly (2), and a base body (3), and the cover body (1) is used for being connected to the base body (3). The control box (90) further comprises an elastic member (4), and two ends of the elastic member (4) are used for respectively applying elastic forces in opposite directions to the cover body (1) and the circuit board assembly (2) so that the circuit board assembly (2) can be tightly pressed on the base body (3), wherein one end of the elastic member (4) is connected to the cover body (1). The circuit board assembly (2) is tightly pressed on the base body (3) by means of the elastic member (4), so that screw holes are not required to be formed in the base body (3), and the manufacturing cost of the base body (3) is reduced. Moreover, the fan assembly (900) comprises an air blower (91) and further comprises the control box (90), the control box (90) is used for controlling the working state of the air blower (91), and therefore, the fan assembly (900) also has the advantage of low manufacturing cost.

Description

Control box and fan assembly

This application claims the priority of the Chinese patent application No. 201922227345.1 filed on December 12, 2019, and the contents of the above-mentioned Chinese patent application are quoted here in full as a part of this application.

Technical field

The application relates to the field of automobile air conditioners, and in particular to a control box and fan assembly.

Background technique

The automobile air-conditioning assembly includes a fan assembly, and the fan assembly includes a blower and a control box. The control box is used to control the working status of the blower, such as the speed.

In the prior art, the control box includes a cover, a circuit board assembly, a base, and screws. The cover body is used for connecting with the base body to define a closed space for accommodating the circuit board assembly. The circuit board assembly is fixed on the base by screws and is located in the enclosed space.

In addition to fixing the circuit board assembly, the base body is also used to dissipate the heat generated by the circuit board assembly. Therefore, the seat body is usually made of metal material. In order to form a screw hole on the seat body to be fitted with a screw, the seat body is generally manufactured by a mold to form the screw hole. The screw holes limit the manufacturing method of the seat body, resulting in heavier weight and higher cost of the seat body.

Application content

The purpose of this application is to provide a control box which has the advantage of low manufacturing cost.

The purpose of the present application is also to provide a fan assembly, which includes the above-mentioned control box.

The control box for achieving the purpose includes a cover, a circuit board assembly, and a base; the cover is used to connect to the base; the control box also includes an elastic member, both ends of the elastic member It is used to apply elastic forces in opposite directions to the cover body and the circuit board assembly, so that the circuit board assembly is pressed against the seat body; wherein one end of the elastic member is connected to the cover Physically.

In one embodiment, the circuit board assembly is arranged between the cover body and the base body, and the elastic member is arranged between the cover body and the circuit board assembly.

In one embodiment, the cover and the base define a closed space; the elastic member and the circuit board assembly are arranged in the closed space.

In an embodiment, the seat body is a stamped part, and/or the elastic part is a curved metal sheet or a curved plastic sheet.

In one embodiment, the cover body includes a cover body and a buckle structure; the cover body is connected to the base body, and the buckle structure is protrudingly disposed on the cover body;

The elastic member has a connecting part and a top part; the connecting part is in a snap fit with the buckle structure, and the top part is used for pressing the circuit board assembly on the seat body.

In one embodiment, the connecting portion has a first wall body, a second wall body and a first connecting wall, wherein the first wall body and the second wall body are respectively connected to the first connecting wall , The abutment top is connected with the second wall body;

The first wall body has a first through hole, and the second wall body has a second through hole; the buckle structure penetrates the first through hole and is clamped with the second through hole; The first wall abuts against the cover body.

In one embodiment, both ends of the second wall body are connected to the abutment portion and the connecting wall respectively; the first wall body and the second wall body are located on the same side of the connecting wall;

Wherein, the first wall is parallel to the second wall.

In one embodiment, the abutment portion has a contact wall and a second connecting wall; one end of the second connecting wall is connected to the second wall, and the other end is connected to the contact wall;

Wherein, the contact wall is parallel to the second wall; the contact wall is used to press the circuit board assembly on the seat;

The second connecting wall includes a first connecting portion and a second connecting portion; one end of the first connecting portion is connected to the second wall body, and the other end is connected to one end of the second connecting portion; The other end of the two connecting parts is connected with the contact wall;

Wherein, the first connecting portion is parallel to the first connecting wall, the second connecting portion and the first connecting portion are arranged at a first angle, and the second connecting portion and the contact wall are arranged at a first angle. Two angle settings;

Wherein, the second wall body and the second connecting portion are located on the same side of the first connecting portion, and the first connecting portion and the contact wall are located on the same side of the second connecting portion.

In one embodiment, the circuit board assembly includes a board body and an electrical element; the electrical element is protrudingly arranged on the board body and is located on one side of the board body; the elastic member abuts against the Electrical components, so that the other side of the board body is pressed against the seat body.

The fan assembly for achieving the purpose includes a blower, and the fan assembly further includes the control box as described above, and the control box is used to control the working state of the blower.

The positive improvement effect of the present application lies in the fact that in the control box provided by the present application, since the circuit board assembly is pressed against the base by the elastic member, there is no need to form screw holes on the base, thereby reducing the manufacturing cost of the base. The fan assembly provided by the present application includes a blower and the above-mentioned control box. The control box is used to control the working state of the blower. Therefore, the fan assembly also has the advantage of low manufacturing cost.

Description of the drawings

The above-mentioned and other features, properties and advantages of this application will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

Figure 1 is a side view of a fan assembly in an embodiment of the application;

Figure 2 is a schematic diagram of a fan assembly in an embodiment of the application;

Figure 3 is a schematic diagram of the control box in an embodiment of the application, the viewing angle of which is to look at the bottom surface of the control box;

Figure 4 is a schematic diagram of the control box in an embodiment of the application, the viewing angle of which is to look at the side of the control box;

Figure 5 is an exploded view of the control box in an embodiment of the application;

Fig. 6 is a schematic diagram of the cover in an embodiment of the application, showing the elastic member;

Figure 7 is a transverse cross-sectional view of the control box in an embodiment of the application;

Figure 8 is a longitudinal cross-sectional view of the control box in an embodiment of the application;

Fig. 9 is a schematic diagram of an elastic member in an embodiment of the application.

Detailed ways

The following discloses various implementations or examples of the subject technical solutions implemented in different ways. In order to simplify the disclosure, specific examples of each element and arrangement are described below. Of course, these are only examples and do not limit the protection scope of the present application. For example, the distribution of the first feature in the second feature described later in the specification may include an embodiment in which the first and second features are directly connected, or may include an additional feature formed between the first and second features. Implementation, so that there may not be a direct connection between the first and second features. In addition, reference numerals and/or letters may be repeated in different examples in these contents. The repetition is for brevity and clarity, and does not indicate the relationship between the various embodiments and/or structures to be discussed. Further, when the first element is described in the manner of being connected or combined with the second element, the description includes the embodiment in which the first and second elements are directly connected or combined with each other, and also includes the use of one or more other intervening elements to add The first and second elements are indirectly connected or combined with each other.

It should be noted that FIGS. 1 to 9 are only examples, and they are not drawn according to the condition of equal proportions, and should not be used as a limitation to the scope of protection actually required by this application.

The automobile air-conditioning assembly includes structures such as ventilation devices, evaporators, and warm air heat exchangers. The ventilation device includes a casing and a fan assembly. The evaporator and the warm air heat exchanger can be arranged in the air duct inside the casing. The fan assembly is used to make the air flow into the air duct inside the casing and flow through the evaporator or warm air heat exchange In this way, the airflow is cooled or heated, and then under the action of the fan assembly, the cooled or heated airflow is sent into the cabin, so that the passengers in the cabin can obtain a more comfortable environment.

Figures 1 and 2 show a fan assembly 900 in an embodiment of the present application. The fan assembly 900 includes a blower 91 and a control box 90, and the control box 90 is used to control the working state of the blower 91. The working state of the blower 91 includes the start and stop of the blower, the rotation speed, and the direction of rotation. The control box 90 may be connected to the blower 91 by screws or bolts.

In a comparative example, the control box includes a cover, a circuit board assembly, a base, and screws. The cover body is used for connecting with the base body to define a closed space for accommodating the circuit board assembly. The circuit board assembly is fixed on the base by screws and is located in the enclosed space. In order to form a screw hole to be fitted with a screw on the seat body, the seat body is generally manufactured by a mold to form the screw hole. The reason is that the material forming the seat body needs to be thick enough to form a long enough in the screw hole. Thread to accommodate the screw. The screw holes limit the manufacturing method of the seat body, resulting in heavier weight and higher cost of the seat body.

In order to reduce the manufacturing cost of the control box, in an embodiment of the present application, as shown in Figures 3, 4, 5, and 6, the control box 90 includes a cover 1, a circuit board assembly 2 and a base 3; The control box 90 also includes an elastic member 4, both ends of the elastic member 4 are used to apply elastic forces in opposite directions to the cover 1 and the circuit board assembly 2 respectively, so that the circuit board assembly 2 is pressed on the seat The body 3; wherein, one end of the elastic member 4 is connected to the cover 1. The cover 1 can be connected to the base 3 by interference fit.

During the assembly process of the control box 90, the end of the elastic member 4 away from the cover 1 comes into contact with the circuit board assembly 2 as the cover 1 is assembled to the base 3, and applies elastic force to the circuit board assembly 2, so that The circuit board assembly 2 is pressed against the base 3. In this way, the heat exchange between the circuit board assembly 2 and the base 3 is efficient, thereby improving the cooling efficiency of the circuit board assembly 2.

In the above-mentioned embodiment, the circuit board assembly 2 is pressed against the seat body 3 by the elastic member 4. Therefore, there is no need to form screw holes on the seat body 3, thereby reducing the manufacturing cost of the seat body 3, and because there is no need to form screw holes The seat body 3 can also be manufactured by stamping instead of a casting mold, so as to further reduce the cost, that is, the seat body 3 can be a stamped part made of a metal material.

Referring to FIGS. 5 and 6, in a specific embodiment, the circuit board assembly 2 is arranged between the cover 1 and the base 3, and the elastic member 4 is arranged between the cover 1 and the circuit board assembly 2. This solution helps to make the structure of the control box 90 compact.

In another embodiment, as shown in FIGS. 7 and 8, a closed space 90a is defined in the cover 1 and the base 3; the elastic member 4 and the circuit board assembly 2 are arranged in the closed space 90a. This solution helps to improve the safety of the circuit board assembly 2.

As shown in Figures 5, 6, 7, 8, and 9, in a specific embodiment, the elastic member 4 may be a curved metal sheet or a curved plastic sheet. When the elastic member 4 is a bent metal sheet, the elastic member 4 has high toughness and is not easy to break. When the elastic member 4 is a curved plastic sheet, the insulating performance of the elastic member 4 is better, and the circuit board assembly 2 will not be short-circuited.

As shown in Figures 6, 7, 8, and 9, in a specific embodiment, the cover 1 includes a cover body 10 and a buckle structure 11; the cover body 10 is used to connect to the base 3, and the buckle structure 11 The elastic member 4 has a connecting portion 40 and a top portion 41; the connecting portion 40 is engaged with the buckle structure 11, and the top portion 41 is used to press the circuit board assembly 2 on the base body 3. . This solution makes it easy to connect the elastic member 4 with the cover 1.

Continuing to refer to FIG. 9, in a more specific embodiment, the connecting portion 40 has a first wall 401, a second wall 402, and a first connecting wall 403, wherein the first wall 401 and the second wall 402 are respectively It is connected to the first connecting wall 403, and the top portion 41 is connected to the second wall 402; the first wall 401 has a first through hole 401a, and the second wall 402 has a second through hole 402a; the buckle structure 11 penetrates through the first The through hole 401a is clamped with the second through hole 402a; the first wall 401 abuts against the cover body 10. This solution can improve the stability of the elastic member 4 connected to the cover 1 so that the elastic member 4 is not easy to fall off from the cover 1, thereby avoiding the risk of the elastic member 4 falling off during the assembly process. In this solution, the first wall body 401 abuts against the cover body 10 in the first direction, and the second wall body 402 abuts against the buckle structure 11 in the second direction through the second through hole 402a, wherein the first direction and The second direction is opposite to each other.

The buckle structure 11 has various structural forms. In the embodiment shown in Figures 6, 7, and 8, the buckle structure 11 includes two hook rods arranged in parallel. One end of the hook rod is connected to the cover body 10, and the other end is hook-shaped to communicate with the second hook. The holes 402a are clamped together, wherein the hook-shaped ends of the two hook rods are respectively clamped on both sides of the hole edge of the second through hole 402a.

In an embodiment not shown in the figure, the buckle structure 11 can also be a cylindrical body, and the end of the cylindrical body has a convex ring that engages with the edge of the second through hole 402a.

Continuing to refer to FIG. 9, the two ends of the second wall 402 are connected to the top portion 41 and the connecting wall 403, respectively; the first wall 401 and the second wall 402 are located on the same side of the connecting wall 403; among them, the first wall 401 Parallel to the second wall 402. This solution makes the elastic member 4 easy to manufacture.

Continuing to refer to FIG. 9, in a more specific embodiment, the abutment portion 41 has a contact wall 411 and a second connecting wall 412; one end of the second connecting wall 412 is connected to the second wall 402, and the other end is connected to the contact wall 411 Wherein, the contact wall 411 is parallel to the second wall 402; the contact wall 411 is used to press the circuit board assembly 2 on the base 3; the second connecting wall 412 includes a first connecting portion 4121 and a second connecting portion 4122; One end of a connecting portion 4121 is connected to the second wall 402, and the other end is connected to one end of the second connecting portion 4122; the other end of the second connecting portion 4122 is connected to the contact wall 411; wherein, the first connecting portion 4121 is parallel to the first A connecting wall 403, the second connecting portion 4122 and the first connecting portion 4121 are arranged at a first included angle α, and the second connecting portion 4122 and the contact wall 411 are arranged at a second included angle β; The two connecting portions 4122 are located on the same side of the first connecting portion 4121, and the first connecting portion 4121 and the contact wall 411 are located on the same side of the second connecting portion 4122. This solution can improve the stability of the elastic member 4 against the circuit board assembly 2. In addition, the setting of the first included angle α and the second included angle β can provide at least a part of the elasticity of the elastic member 4.

In a more specific embodiment, the range of the first included angle α and the second included angle β may both be between 120° and 150°. Preferably, the sum of the first included angle α and the second included angle β is 270°.

5, 7, 8, in one embodiment, the circuit board assembly 2 includes a board body 20 and an electrical component 21; the electrical component 21 is protrudingly arranged on the board body 20 and located on one side of the board body 20; the elastic member 4 Press against the electrical component 21 so that the other side of the board body 20 is pressed against the seat body 3.

The number of elastic members 4 may be multiple. In the embodiment shown in FIG. 5, the number of elastic members 4 is three. The plurality of elastic members 4 can be distributed at different positions on the cover body 10 as required.

As shown in FIGS. 3, 4, and 7, the base 3 has a protrusion 3 a protruding toward the outside, and the protrusion 3 a is used to increase the heat dissipation area of the base 3 to improve the heat dissipation efficiency of the control box 90.

Although this application is disclosed as above in the preferred embodiments, it is not intended to limit the application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the application. The content of the technical solution of this application, and any amendments, equivalent changes and modifications made to the above embodiments based on the technical essence of this application fall within the protection scope defined by the claims of this application.

Claims

A control box, comprising a cover body (1), a circuit board assembly (2) and a base body (3); the cover body (1) is used to connect to the base body (3);

It is characterized in that, the control box (90) further includes an elastic member (4), and both ends of the elastic member (4) are used to apply to the cover body (1) and the circuit board assembly (2) respectively. Elastic force in opposite directions, so that the circuit board assembly (2) is pressed against the seat body (3);

Wherein, one end of the elastic member (4) is connected to the cover body (1).
The control box according to claim 1, wherein the circuit board assembly (2) is arranged between the cover body (1) and the base body (3), and the elastic member (4) is arranged Between the cover (1) and the circuit board assembly (2).
The control box according to claim 2, wherein the cover (1) and the base (3) define a closed space (90a); the elastic member (4) and the circuit board assembly (2) It is installed in the enclosed space (90a).
The control box according to claim 1, wherein the seat body (3) is a stamped part, and/or the elastic part (4) is a curved metal sheet or a curved plastic sheet.
The control box according to claim 1, wherein the cover body (1) comprises a cover body (10) and a buckle structure (11); the cover body (10) is used to connect to the On the seat body (3), the buckle structure (11) is protrudingly arranged on the cover body (10);

The elastic member (4) has a connecting portion (40) and a top portion (41); the connecting portion (40) is snap-fitted with the buckle structure (11), and the top portion (41) is used to The circuit board assembly (2) is pressed tightly on the seat body (3).
The control box according to claim 5, wherein the connecting portion (40) has a first wall (401), a second wall (402) and a first connecting wall (403), wherein the The first wall (401) and the second wall (402) are respectively connected to the first connecting wall (403), and the abutment portion (41) is connected to the second wall (402);

The first wall (401) has a first through hole (401a), the second wall (402) has a second through hole (402a); the buckle structure (11) penetrates the first through hole (402a) The hole (401a) is clamped with the second through hole (402a); the first wall body (401) abuts against the cover body (10).
The control box according to claim 6, characterized in that, both ends of the second wall (402) are respectively connected to the top portion (41) and the connecting wall (403); the first wall The body (401) and the second wall body (402) are located on the same side of the connecting wall (403);

Wherein, the first wall (401) is parallel to the second wall (402).
The control box according to claim 6, wherein the abutment portion (41) has a contact wall (411) and a second connecting wall (412); one end of the second connecting wall (412) is connected to the The second wall (402) is connected, and the other end is connected with the contact wall (411);

Wherein, the contact wall (411) is parallel to the second wall body (402); the contact wall (411) is used to press the circuit board assembly (2) on the seat body (3) ；

The second connecting wall (412) includes a first connecting portion (4121) and a second connecting portion (4122); one end of the first connecting portion (4121) is connected to the second wall (402), and the other One end is connected to one end of the second connecting portion (4122); the other end of the second connecting portion (4122) is connected to the contact wall (411);

Wherein, the first connecting portion (4121) is parallel to the first connecting wall (403), and the second connecting portion (4122) and the first connecting portion (4121) form a first angle (α) Provided that the second connecting portion (4122) and the contact wall (411) are arranged at a second included angle (β);

Wherein, the second wall body (402) and the second connecting portion (4122) are located on the same side of the first connecting portion (4121), and the first connecting portion (4121) and the contact wall ( 411) is located on the same side of the second connecting portion (4122).
The control box according to claim 2, wherein the circuit board assembly (2) includes a board body (20) and an electrical component (21); the electrical component (21) is protrudingly arranged on the board body (20) on and on one side of the board (20); the elastic member (4) abuts on the electrical component (21) so that the other side of the board (20) is It is pressed tightly on the seat body (3).
A fan assembly, comprising a blower (91), characterized in that the fan assembly (900) further comprises a control box (90) according to any one of claims 1 to 9, the control box ( 90) Used to control the working state of the blower (91).