Speed regulation resistor for automobile fan

Abstract

The utility model provides a speed regulation resistor for an automobile fan, which is arranged at an air outlet of the fan, the speed regulation resistor comprises a resistor shell, a resistance wire and a temperature protector, the resistance wire and the temperature protector are arranged in the resistor shell, one side of the resistor shell is provided with a mounting plate used for being fixed with a fan frame, and one side of an inner cavity of the resistor shell is provided with a partition plate. The partition divides two sides of the inner cavity of the resistor shell into a resistance wire cavity and a fusing cavity, a through hole is formed in one end of the partition, and a plurality of vent holes are symmetrically formed in the side walls of the front and rear ends of the fusing cavity; a resistance wire cavity is formed in the aluminum shell, two insulating sleeves distributed left and right are arranged in the resistance wire cavity, a resistance wire is arranged in each insulating sleeve, one ends of the two resistance wires are connected through a wire, extend into the fusing cavity through the through hole and are connected with a temperature protector in series, and the temperature protector is located at the ventilation hole. And the device is completely separated from external inflammables, so that the risk of open fire is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile components, and in particular relates to a speed regulating resistor for an automobile fan. Background Art

[0002] The traditional fan speed regulating resistor is generally installed at the corner of the fan frame. Since the speed regulating resistor itself generates a lot of heat when working, when the fan motor is not running normally (stall), the continuous current passing through the resistor causes the temperature of the resistor wire to rise abnormally, which may burn the surrounding plastic parts and cause the fan to fail to work normally. Chinese patent document: CN202020783305.5 discloses a car cooling fan that protects the speed regulating resistor. In this application, the speed regulating resistor is installed at the fan air outlet and the wind force generated by the fan is used to dissipate the heat of the speed regulating resistor. However, the single resistor structure is easy to affect the fan air volume, and the traditional speed regulating resistor shell is made of plastic material, which not only has poor thermal conductivity, which will affect the heat dissipation effect of the resistor, but also easily causes failures due to external open fire accidents. Utility Model Content

[0003] The main purpose of the utility model is to provide a speed regulating resistor for an automobile fan, which solves the problems of poor heat dissipation effect and low safety of the speed regulating resistor for an automobile fan in the prior art.

[0004] The specific technical solutions are as follows:

[0005] A speed regulating resistor for an automobile fan is arranged at the air outlet of the fan. The speed regulating resistor comprises a resistor housing, a resistance wire arranged in the resistor housing, and a temperature protector. A mounting plate for fixing to a fan frame is arranged on one side of the resistor housing. The interior of the resistor housing is arranged as a cavity. A partition is arranged on one side of the inner cavity of the resistor housing. The partition separates the two sides of the inner cavity of the resistor housing into a resistance wire cavity and a fuse cavity. A through hole is opened at one end of the partition. A plurality of ventilation holes are symmetrically opened on the side walls at the front and rear ends of the fuse cavity. Two insulating sleeves distributed on the left and right are arranged in the resistance wire cavity. A resistance wire is respectively arranged in the two insulating sleeves. One end of the two resistance wires is respectively extended to the outside of the resistor housing through a wire. The other ends of the two resistance wires are connected by a wire and extend into the fuse cavity through the through hole and are connected in series with the temperature protector. One end of the temperature protector is extended to the outside of the resistor housing through a wire, and the temperature protector is located at the ventilation hole.

[0006] Preferably, one end of the resistor shell is closed and the other end is open. A cover is provided at the opening at one end of the resistor shell, and a hole is provided on the cover for the wire to pass through. A surface of one end of the cover is provided for embedding an insert portion in the resistor shell, and a step groove matching the insert portion is provided on the inner wall of the resistor shell at the open end.

[0007] Preferably, the resistor housing comprises a base and a cover body, and corresponding threaded seats are respectively provided at both ends between the base and the cover body, so that the base and the cover body are fixed by fasteners cooperating with the threaded seats.

[0008] Preferably, the inner walls of the base and the cover at the positions of the two insulating sleeves are both recessed outwards, so that grooves for positioning the insulating sleeves are formed on the inner walls at both ends of the base and the cover.

[0009] Preferably, the bottom of the mounting plate is flush with the bottom of the base, and screw holes are provided at both ends of the mounting plate.

[0010] Preferably, the resistor housing is made of aluminum alloy material.

[0011] Preferably, the insulating sleeve is made of high-frequency insulating ceramics.

[0012] The beneficial effects of the utility model are embodied in:

[0013] (1) The housing of the speed regulating resistor of the utility model is made of aluminum alloy and is installed at the air outlet of the fan, which effectively improves the heat dissipation effect.

[0014] (2) Compared with the traditional resistance wire that is exposed, the resistance wire of the utility model is isolated inside the aluminum shell, completely separated from the external flammable materials, avoiding the risk of failure causing open flames, and has a reliable structure and a long service life.

[0015] (3) The utility model has large ventilation holes at both ends of the fuse cavity, which not only ensures the heat dissipation of the temperature protector to extend the service life, but also effectively avoids the noise that may be generated when the wind passes through. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the structure between the resistance wire and the insulating sleeve in the utility model.

[0018] Figure 3 It is a structural schematic diagram of the resistor housing in the utility model.

[0019] Figure 4 It is a structural schematic diagram of the base in the utility model.

[0020] Figure 5 This is a wiring diagram when the speed regulating resistor in the utility model is adjusted to a low speed

[0021] Figure 6 This is a wiring diagram when the speed regulating resistor in the utility model is adjusted to medium speed.

[0022] Figure 7It is the circuit diagram of the speed regulating resistor in the utility model.

[0023] Explanation of the reference numerals: resistor housing 1, resistor wire cavity 101, fuse cavity 102, mounting plate 11, partition 12, through hole 13, ventilation hole 14, insulating sleeve 15, step groove 16, base 17, cover 18, threaded seat 19, resistor wire 2, temperature protector 3, wire 4. DETAILED DESCRIPTION

[0024] In order to make the technical solution of the utility model clearer, the utility model is further described below in conjunction with the accompanying drawings. Any equivalent replacement of the technical features of the technical solution of the utility model and any solution derived from conventional reasoning shall fall within the protection scope of the utility model. The fixed connection and fixed setting mentioned in the utility model are all common connection methods in the mechanical field, including welding, bolt and nut connection, and screw connection.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] like Figure 1-5As shown, this embodiment provides a speed regulating resistor for automobile blower, which is arranged at the air outlet of the fan. The speed regulating resistor includes a resistor housing 1, a resistance wire 2 arranged in the resistor housing 1, and a temperature protector 3. A mounting plate 11 for fixing to the fan frame is provided on one side of the resistor housing 1. The bottom of the mounting plate 11 is flush with the bottom of the base 17. Screw holes are provided at both ends of the mounting plate 11, so that the speed regulating resistor is fixed to the frame at the air outlet of the fan through bolt fasteners. The interior of the resistor housing 1 is a cavity, and a partition 12 is provided on one side of the inner cavity of the resistor housing 1. The partition 12 separates the two sides of the inner cavity of the resistor housing 1 into a resistance wire 2 cavity 101 and a fuse cavity 102. A through hole 13 is provided at one end of the partition 12, and a plurality of ventilation holes 14 are symmetrically provided on the side walls at the front and rear ends of the fuse cavity 102; two insulating sleeves 15 distributed on the left and right are provided in the resistance wire 2 cavity 101. The material of the insulating sleeve 15 is high-frequency insulating ceramic. A resistance wire 2 is provided in each of the two insulating sleeves 15. The two resistance wires 2 The resistance values ​​are different. One end of the two resistance wires 2 is extended to the outside of the resistor housing 1 through the wire 4 respectively. The other ends of the two resistance wires 2 are connected by wires and extend into the fuse cavity 102 through the through hole 13 and are connected in series with the temperature protector 3. One end of the temperature protector 3 is extended to the outside of the resistor housing 1 through the wire 4, and the temperature protector 3 is located at the ventilation hole 14. The use of ventilation holes that penetrate a large area can ensure the heat dissipation of the temperature protector 3 and extend the service life, and effectively avoid the noise (such as whistle) that may be generated by the passage of wind speed.

[0027] In this embodiment, the resistor housing 1 is made of ADC12 aluminum alloy, which is a die-cast aluminum alloy with good mechanical properties and corrosion resistance.

[0028] In this embodiment, one end of the resistor housing 1 is closed and the other end is open. A cover (not shown in the figure) is provided at the opening at one end of the resistor housing 1. The cover is provided with a hole for the wire 4 to pass through. A protrusion on the surface of one end of the cover is provided for embedding into the inserting portion of the resistor housing 1. A step groove 16 matching the inserting portion is provided on the inner wall of the resistor housing 1 at the open end, and 704 waterproof glue is applied to the step groove 16 to make the resistor wire 2 inside the resistor housing 1 dustproof and waterproof.

[0029] In this embodiment, the resistor housing 1 includes a base 17 and a cover 18, and corresponding threaded seats 19 are respectively provided at both ends between the base 17 and the cover 18, so that the base 17 and the cover 18 are fixed by fasteners and the threaded seats 19. The inner walls of the base 17 and the cover 18 at the positions of the two insulating sleeves 15 are both concave outward, and grooves for positioning the insulating sleeves 15 are formed on the inner walls at both ends of the base 17 and the cover 18.

[0030] In this embodiment, the resistance values ​​of the two resistance wires 2 are 0.19Ω and 0.84Ω respectively. Figure 5 As shown, the positive 12V power supply is connected in series with a 0.84Ω resistor, the current passing through is relatively small, the heat generated is relatively small, and it is installed in the middle position and located close to the temperature protector 3. Figure 6 As shown, the positive 12VΩ power supply is connected in series with 0.19Ω. The current passing through is large, and the heat generation increases accordingly. It is installed at a position far away from the temperature protector 3.

[0031] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A speed regulating resistor for an automobile fan, arranged at the air outlet of the fan, characterized in that: The speed regulating resistor comprises a resistor housing (1), a resistor wire (2) arranged in the resistor housing (1), and a temperature protector (3); a mounting plate (11) for fixing to a fan frame is provided on one side of the resistor housing (1); the interior of the resistor housing (1) is provided with a cavity; a partition (12) is provided on one side of the inner cavity of the resistor housing (1); the partition (12) separates the two sides of the inner cavity of the resistor housing (1) into a resistor wire (2) cavity (101) and a fuse cavity (102); a through hole (13) is provided at one end of the partition (12); and a plurality of ventilation holes (13) are symmetrically provided on the side walls at the front and rear ends of the fuse cavity (102). hole (14); two insulating sleeves (15) distributed on the left and right are arranged in the resistance wire (2) cavity (101); a resistance wire (2) is respectively arranged in the two insulating sleeves (15); one end of the two resistance wires (2) is respectively extended to the outside of the resistance housing (1) through a wire (4); the other ends of the two resistance wires (2) are connected by a wire and extend into the fuse cavity (102) through the through hole (13) and are connected in series with the temperature protector (3); one end of the temperature protector (3) is extended to the outside of the resistance housing (1) through a wire, and the temperature protector (3) is located at the ventilation hole (14).

2. A speed regulating resistor for an automobile fan as claimed in claim 1, characterized in that: One end of the resistor housing (1) is closed, and the other end is open. A step groove (16) is provided on the inner wall of the resistor housing (1) at the open end.

3. A speed regulating resistor for an automobile fan as claimed in claim 1, characterized in that: The resistor housing (1) comprises a base (17) and a cover (18), and corresponding threaded seats (19) are respectively provided at both ends between the base (17) and the cover (18), so that the base (17) and the cover (18) are fixed together by fasteners cooperating with the threaded seats (19).

4. A speed regulating resistor for an automobile fan as claimed in claim 3, characterized in that: The inner walls of the base (17) and the cover (18) at the positions of the two insulating sleeves (15) are both recessed outwards, so that the inner walls at both ends of the base (17) and the cover (18) form grooves for positioning the insulating sleeves (15).

5. A speed regulating resistor for automobile fan as claimed in claim 3, characterized in that: The bottom of the mounting plate (11) is flush with the bottom of the base (17), and screw holes are provided at both ends of the mounting plate (11).

6. A speed regulating resistor for automobile fan as claimed in claim 1, characterized in that: The resistor housing (1) is made of aluminum alloy material.

7. A speed regulating resistor for an automobile fan as claimed in claim 1, characterized in that: The insulating sleeve (15) is made of high-frequency insulating ceramics.

Images