Speed regulating device for automobile air conditioner blower

Abstract

This utility model discloses a speed regulating device for an automotive air conditioning blower, comprising a housing, inside which a ventilation assembly is installed. The ventilation assembly includes an air collecting pipe fixedly connected inside the housing. Two air outlets are provided at the bottom of the outer circumference of the air collecting pipe. An air inlet pipe is fixedly inserted into one end of the air collecting pipe, and a connecting pipe is fixedly inserted into the connector of the air inlet pipe. An air guide cover is provided at the top end of the connecting pipe. A solenoid valve is installed inside the connection end between the connecting pipe and the air guide cover. The air guide cover is installed on the bottom inner wall of the air conditioning duct and is flared. A circuit board is installed on the bottom inner wall of the housing. By setting up a ventilation assembly, this utility model can use the airflow generated during the operation of the automotive air conditioning to perform secondary cooling on the internal components of the regulating device, thereby reducing the problem of reduced lifespan of the controller due to high temperature environment or high load operation.

Description

Technical Field

[0001] This utility model relates to the technical field of fan speed control devices, specifically a speed control device for an automotive air conditioning blower. Background Technology

[0002] With the advancement of electronic technology, electronic speed control devices are increasingly being applied to automotive air conditioning blowers. For example, thyristor (silicon controlled rectifier) ​​speed control technology is used, which adjusts the output voltage by controlling the conduction angle of the thyristor, thereby controlling the speed of the blower.

[0003] A search revealed a utility model patent with Chinese patent publication number CN202149050U, which discloses a speed control device for an automotive air conditioning blower. The device uses a PCB board installed in a cavity formed by a lower cover and an outer cover. The PCB board has a control circuit that outputs PWM signals. The outer cover has a detachable buckle, one end of which engages with a guide groove on the outer cover, and the buckle's hole engages with the buckle's teeth on the lower cover for fixation.

[0004] The temperature inside a car engine compartment is high, especially during long-term operation or in high-temperature environments. The blower speed control device needs to withstand the test of high temperatures. High temperatures may affect the performance and lifespan of electronic components in the speed control device, such as causing a decrease in capacitor capacity and changes in resistor values. There is room for improvement. Utility Model Content

[0005] The purpose of this utility model is to provide a speed control device for an automotive air conditioning blower to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a speed regulating device for an automotive air conditioning blower, comprising a housing, an air exchange assembly installed inside the housing, the air exchange assembly including an air collecting pipe fixedly connected inside the housing, two air outlets provided at the bottom of the outer circumference of the air collecting pipe, an air inlet pipe fixedly inserted at one end of the air collecting pipe, a connecting pipe fixedly inserted at the connector of the air inlet pipe, an air guide cover provided at the top end of the connecting pipe, a solenoid valve installed inside the connection end between the connecting pipe and the air guide cover, the air guide cover being installed on the inner wall at the bottom of the air conditioning duct, and the air guide cover being flared.

[0007] When the car air conditioner is running, the generated airflow can be used to cool the internal components of the control unit, which can reduce the problem of reduced lifespan of the controller due to high temperature environment or high load operation. When the air conditioner is running, part of the airflow filtered by the filter element in the air duct is intercepted by the air guide cover, and then guided into the connecting pipe, and then into the air collection pipe through the air intake pipe. Then it flows outward from the two air outlets outside the air collection pipe. The two airflows can directly act on the gap between the top component of the reinforcing frame and the heat sink, take away the heat on their surface, and finally flow outward through the exhaust port.

[0008] As a further preferred embodiment of this technical solution, a circuit board is installed on the inner wall of the bottom of the housing, and a heat sink is fixedly connected to one side of the outer wall of the top of the circuit board. The heat sink includes several fins and a connecting frame, and the two air outlets are respectively positioned facing the heat sink and the top component of the circuit board.

[0009] As a further preferred embodiment of this technical solution, a limiting frame is installed inside the housing, and a housing cover is installed outside the limiting frame. An exhaust port is provided at the bottom of one side of the outer wall of the housing cover. Two hinge seats are fixedly connected to one side of the outer wall of the housing cover, and the same baffle is hinged between the two hinge seats. The baffle covers the outside of the exhaust port.

[0010] As a further preferred embodiment of this technical solution, a reinforcing frame is fixedly sleeved on the outside of the shell cover, and several connecting screws are slidably inserted into the reinforcing frame and the inside of the shell cover, and the several connecting screws are all threadedly connected inside the limiting frame.

[0011] As a further preferred embodiment of this technical solution, both the shell cover and the reinforcing frame are made of copper.

[0012] As a further preferred embodiment of this technical solution, an extension piece is fixedly connected to the outer wall of one end of the housing, and each of the four extension pieces has a through hole.

[0013] As a further preferred embodiment of this technical solution, the lower half of the connecting pipe is made of a steel wire hose.

[0014] This utility model provides a speed control device for an automotive air conditioning blower, which has the following beneficial effects:

[0015] This invention, by setting up a ventilation component, can use the airflow generated during the operation of the car air conditioner to perform secondary cooling on the internal components of the control unit. This reduces the problem of reduced lifespan of the controller due to high temperature environment or high load operation. When the air conditioner is running, part of the airflow filtered by the filter element in the air duct is intercepted by the air guide cover, and then guided into the connecting pipe, then into the air collection pipe through the air inlet pipe, and then flows outward from the two air outlets outside the air collection pipe. The two airflows can directly act on the gap between the top component of the reinforcing frame and the heat sink, taking away the heat on their surface, and finally flowing outward through the exhaust port. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall third-view structure of this utility model;

[0019] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0020] In the diagram: 1. Housing; 2. Housing cover; 3. Circuit board; 4. Heat sink; 5. Limiting bracket; 6. Extension plate; 7. Ventilation assembly; 8. Connecting screw; 9. Circuit board; 701. Air collection pipe; 702. Air outlet; 703. Air inlet pipe; 704. Connecting pipe; 705. Air guide cover; 706. Exhaust vent; 707. Hinge seat; 708. Baffle. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] This utility model provides a technical solution: such as Figure 1 , Figure 3 and Figure 4 As shown in this embodiment, an automotive air conditioning blower speed control device includes a housing 1. An air exchange assembly 7 is installed inside the housing 1. The air exchange assembly 7 includes an air collection pipe 701, which is fixedly connected inside the housing 1. Two air outlets 702 are provided at the bottom of the outer circumference of the air collection pipe 701. An air inlet pipe 703 is fixedly inserted into one end of the air collection pipe 701. A connecting pipe 704 is fixedly inserted into the connector of the air inlet pipe 703. An air guide cover 705 is provided at the top end of the connecting pipe 704. A solenoid valve is installed inside the connection end between the connecting pipe 704 and the air guide cover 705. The air guide cover 705 is installed on the inner wall of the bottom of the air conditioning duct and is flared.

[0023] A circuit board 9 is installed on the bottom inner wall of the housing 1. A heat sink 4 is fixedly connected to one side of the top outer wall of the circuit board 9. The heat sink 4 includes several fins and a connecting frame. Two air outlets 702 are respectively set towards the heat sink 4 and the top component of the circuit board 9.

[0024] Inside the housing 1, a limiting frame 5 is installed. The limiting frame 5 is covered by a housing cover 2. An exhaust port 706 is opened at the bottom of one side of the outer wall of the housing cover 2. Two hinge seats 707 are fixedly connected to one side of the outer wall of the housing cover 2. The same baffle 708 is hinged between the two hinge seats 707. The baffle 708 covers the outside of the exhaust port 706.

[0025] When the air conditioner is running, a portion of the airflow filtered by the filter element in the duct is intercepted by the air guide cover 705, and then guided into the connecting pipe 704, and then into the collecting pipe 701 through the air inlet pipe 703. Then, it flows outward from the two air outlets 702 outside the collecting pipe 701. The two airflows can directly act on the gap between the top components of the circuit board 9 and the heat sink 4, taking away the heat from their surfaces. Finally, it flows outward through the exhaust port 706. During the outward spray of the airflow, external dust cannot enter the interior of the housing 1. When the airflow stops, the baffle 708 will flip along the hinge 707, which can block the exhaust port 706, which helps to improve the cleanliness of the inside of the device.

[0026] like Figure 1 and Figure 2 As shown, a reinforcing frame 3 is fixedly sleeved on the outside of the shell cover 2. Several connecting screws 8 are slidably inserted into the reinforcing frame 3 and the inside of the shell cover 2, and the several connecting screws 8 are all threadedly connected inside the limiting frame 5.

[0027] If maintenance is required, simply unscrew the connecting screw 8 inside the reinforcing frame 3 to remove the cover 2 directly, exposing the internal components. After installation, place the cover 2 over the reinforcing frame 3 so that it aligns with the limiting frame 5. Then, pass the connecting screw 8 through the reinforcing frame 3 and connect it to the limiting frame 5. Since the connecting screw 8 is located at the corner of the cover 2, the reinforcing frame 3 and the cover 2 will be pressed tightly against the outside of the limiting frame 5 by the pressure of the connecting screw 8, which can effectively improve the airtightness of the housing 1 and the cover 2.

[0028] like Figure 1 and Figure 2 As shown, both the cover 2 and the reinforcing frame 3 are made of copper, which has excellent heat dissipation properties, ensuring that the device can be used normally even in winter.

[0029] like Figure 2 and Figure 3As shown, an extension piece 6 is fixedly connected to the outer wall of one end of the housing 1, and each of the four extension pieces 6 has a through hole. The connector can be connected and fixed to the vehicle body by passing through the through hole of the extension piece 6.

[0030] like Figure 1 and Figure 2 As shown, the lower half of the connecting pipe 704 is made of steel wire hose, which allows the connecting pipe 704 to provide a good passage for airflow even when it bends.

[0031] This utility model provides a speed control device for an automotive air conditioning blower, the specific working principle of which is as follows:

[0032] When the device is in operation, the connecting pipe 704 is passed through the car's air conditioning duct, and then the air guide cover 705 is fixed to the inner wall of the duct using a connector, ensuring that the opening of the air guide cover 705 faces the air intake direction. (It should be noted that the air guide cover 705 is installed in the air outlet duct where it cannot directly act on the passengers.) Then, the inlet pipe 703 connector is connected to the connecting pipe 704 connector. When the air conditioning is running, a portion of the airflow filtered by the filter element in the duct is intercepted by the air guide cover 705, and then guided into the connecting pipe 704, and then... The air inlet pipe 703 enters the air collecting pipe 701, and then flows outward from the two air outlets 702 outside the air collecting pipe 701. The two airflows can directly act on the gap between the top components of the circuit board 9 and the heat sink 4, taking away the heat on their surfaces. Finally, they flow outward through the exhaust port 706. During the outward spraying of the airflow, external dust cannot enter the interior of the housing 1. When the airflow stops, the baffle 708 will flip along the hinge 707, which can block the exhaust port 706, thus improving the cleanliness of the device. In winter, the ambient temperature is low, which allows heat to dissipate quickly and prevents heat accumulation. Compared to summer when the refrigeration system operates under high load and generates a lot of heat, requiring the blower and speed control device to handle the heat transfer, the blower and speed control device generate relatively little heat in winter. With the help of the heat sink 4 and the reinforcing frame 3, heat dissipation is sufficient to ensure the normal operation of the device. Since the ambient temperature is low in winter, the device itself has good heat dissipation conditions. To further optimize heat dissipation, the solenoid valve inside the connecting pipe 704 can be closed to prevent hot air from adversely affecting the heat dissipation of the device. If maintenance is required, simply unscrew the connecting screw 8 inside the reinforcing frame 3 to remove the cover 2 directly, exposing the internal components. After installation, place the cover 2 over the reinforcing frame 3 so that it aligns with the limiting frame 5. Then, pass the connecting screw 8 through the reinforcing frame 3 and connect it to the limiting frame 5. Since the connecting screw 8 is located at the corner of the cover 2, the reinforcing frame 3 and the cover 2 will be pressed tightly against the outside of the limiting frame 5 by the pressure of the connecting screw 8, which can effectively improve the airtightness of the housing 1 and the cover 2.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A speed regulating device for an automotive air conditioning blower, comprising a housing (1), characterized in that: The housing (1) is equipped with a ventilation assembly (7). The ventilation assembly (7) includes an air collection pipe (701). The air collection pipe (701) is fixedly connected to the inside of the housing (1). The bottom of the outer circumference of the air collection pipe (701) is provided with two air outlets (702). One end of the air collection pipe (701) is fixedly connected to an air inlet pipe (703). A connecting pipe (704) is fixedly connected to the connector of the air inlet pipe (703). A guide hood (705) is provided at the top end of the connecting pipe (704). A solenoid valve is installed inside the connection end between the connecting pipe (704) and the guide hood (705). The guide hood (705) is installed on the inner wall of the bottom of the air conditioning duct and is flared.

2. The speed regulating device for an automotive air conditioning blower according to claim 1, characterized in that: A circuit board (9) is installed on the bottom inner wall of the housing (1). A heat sink (4) is fixedly connected to one side of the top outer wall of the circuit board (9). The heat sink (4) includes several fins and a connecting frame. The two air outlets (702) are respectively set towards the heat sink (4) and the top components of the circuit board (9).

3. The automotive air conditioning blower speed control device according to claim 1, characterized in that: The housing (1) is equipped with a limiting frame (5) inside. The limiting frame (5) is covered with a housing cover (2). An exhaust port (706) is opened at the bottom of one side of the outer wall of the housing cover (2). Two hinge seats (707) are fixedly connected to one side of the outer wall of the housing cover (2). The same baffle (708) is hinged between the two hinge seats (707). The baffle (708) covers the outside of the exhaust port (706).

4. The automotive air conditioning blower speed control device according to claim 3, characterized in that: The outer shell cover (2) is fixedly fitted with a reinforcing frame (3), and a number of connecting screws (8) are slidably inserted into the inner shell cover (2) and the reinforcing frame (3), and the number of connecting screws (8) are all threadedly connected inside the limiting frame (5).

5. The automotive air conditioning blower speed control device according to claim 3, characterized in that: Both the shell cover (2) and the reinforcing frame (3) are made of copper.

6. The speed regulating device for an automotive air conditioning blower according to claim 1, characterized in that: An extension piece (6) is fixedly connected to the outer wall of one end of the housing (1), and each of the four extension pieces (6) has a through hole.

7. The speed regulating device for an automotive air conditioning blower according to claim 1, characterized in that: The lower half of the connecting pipe (704) is made of steel wire hose.

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