Direct-current electric heater applied to automobile filter

Abstract

The utility model is applicable to the technical field of filter heaters, in particular to a direct-current electric heater applied to an automobile filter, which comprises a connector, a connecting circuit board is connected to the surface of the connector, a bimetallic strip is arranged on the surface of the connecting circuit board, and heating plates are arranged on four sides of the surface of the connecting circuit board. According to the utility model, the first through hole, the second through hole, the third through hole, the fourth through hole, the arc-shaped heating sheet main body, the first copper lead, the second copper lead, the third copper lead and the fourth copper lead are arranged, so that the connection mode of the heating sheet and the connection circuit board is simpler and more convenient; according to the direct-current heater, the tin soldering frequency can be reduced, the assembling speed is increased, the technological manufacturing difficulty is reduced, the production cost of the direct-current heater is reduced, and the practicability of the direct-current heater is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter heaters, in particular to a direct current electric heater applied to automobile filters. Background Art

[0002] The car filter is an important part of the car engine. Its main function is to filter dust and impurities in the air to ensure that the air entering the engine is clean, thereby ensuring the normal operation and service life of the engine. In a cold environment, the filter is prone to ice due to the low temperature, resulting in a decrease in the filtering effect or even complete failure. At this time, it is necessary to install a heating device on the filter to ensure that it can still work normally in a low temperature environment.

[0003] DC electric heaters are widely used in various heating applications, including automotive filters, due to their simplicity, high efficiency and easy control. DC electric heaters generate heat by passing current through the heating plate, which can quickly increase the temperature around the filter to prevent the filter from freezing, thereby ensuring the normal operation of the filter. The heating plate is usually made of materials with excellent conductive properties, which can quickly heat up and evenly distribute heat to improve heating efficiency.

[0004] However, in the prior art, the installation and connection methods of DC electric heaters are relatively complicated, especially the connection between the heating plate and the circuit board requires multiple soldering operations, which not only increases the production cost but also reduces the assembly efficiency. In addition, multiple soldering operations may also lead to loose connections, affecting the service life and reliability of the heater. The prior art also has the problem of a single heating plate material, which cannot fully utilize the advantages of different materials, resulting in unsatisfactory heating efficiency and service life. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a DC electric heater applied to an automobile filter, aiming to solve the technical problems mentioned in the background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A DC electric heater used in an automobile filter comprises a connector, a surface of the connector is connected to a connection circuit board, a surface of the connection circuit board is provided with a bimetallic sheet, and four sides of the surface of the connection circuit board are provided with heating sheets;

[0008] The connector comprises a connector body, and a connector negative terminal and a connector positive terminal are arranged on the surface of the connector body;

[0009] The connecting circuit board includes a connecting circuit board body, and the connecting circuit board body is annular, and the four sides of the surface of the connecting circuit board body are all provided with a first through hole, a second through hole, a third through hole and a fourth through hole, and the surface of the connecting circuit board body near the connector is provided with an eighth through hole and a ninth through hole, and the surface of the connecting circuit board body near the bimetallic strip is provided with a fifth through hole, a sixth through hole and a seventh through hole;

[0010] The bimetal strip comprises a bimetal strip body, and a first bimetal strip terminal and a second bimetal strip terminal are respectively arranged on two sides of the outer side of the bimetal strip body;

[0011] The heating plate comprises a heating plate body, and a first copper wire, a second copper wire, a third copper wire and a fourth copper wire are arranged on the outer side of the heating plate body;

[0012] The front side of the connecting circuit board is equipped with a first connecting circuit board pad and a second connecting circuit board pad, the first connecting circuit board pad is electrically connected to the first bimetallic terminal, and the second connecting circuit board pad is electrically connected to the second bimetallic terminal, the first via and the third via are both connected to the inside of the third via, and the end of the third current-carrying wire away from the first via or the third via is electrically connected to the negative terminal of the connector, the second via and the fourth via are both connected to the inside of the second current-carrying wire, and the end of the second current-carrying wire away from the second via or the fourth via is electrically connected to the second connecting circuit board pad, the outer side of the first connecting circuit board pad is connected to the first current-carrying wire, and the end of the first current-carrying wire away from the first connecting circuit board pad is electrically connected to the positive terminal of the connector.

[0013] Furthermore, the bimetallic strip body is installed inside the fifth via, and the first bimetallic strip terminal and the second bimetallic strip terminal are respectively placed inside the seventh via and the sixth via, the connector positive terminal and the connector negative terminal are respectively placed inside the eighth via and the ninth via, and the first copper wire, the second copper wire, the third copper wire and the fourth copper wire are respectively placed inside the first via, the second via, the third via and the fourth via.

[0014] Furthermore, the heating plate body is made of plastic and carbon fiber materials.

[0015] Furthermore, the heating plate body is a component of an arc-shaped structure and is equidistantly distributed on the surface of the connecting circuit board body, and the distribution positions of the first copper wire, the second copper wire, the third copper wire and the fourth copper wire on the heating plate body are adapted to the distribution positions of the first via, the second via, the third via and the fourth via on the connecting circuit board body.

[0016] The utility model provides a DC electric heater applied to an automobile filter, which has the following beneficial effects:

[0017] By providing a first via hole, a second via hole, a third via hole, a fourth via hole, an arc-shaped heating plate body, a first copper wire, a second copper wire, a third copper wire and a fourth copper wire, the connection method between the heating plate and the connecting circuit board can be made simpler and more convenient. Moreover, through the special connection method and structural structure, the number of soldering times can be reduced and the assembly speed can be accelerated, thereby reducing the difficulty of process manufacturing, reducing the production cost of the DC heater, and improving the practicality of the DC electric heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic diagram of the structure of a DC electric heater used in an automobile filter.

[0019] Figure 2 The figure is a schematic diagram of the top structure of a DC electric heater used in an automobile filter.

[0020] Figure 3 The present invention is a schematic diagram of the structure of a connection circuit board used in a DC electric heater of an automobile filter.

[0021] Figure 4 The diagram is a front structural diagram of a heating plate in a DC electric heater used in an automobile filter.

[0022] Figure 5 The diagram is a top view of a heating plate in a DC electric heater used in an automobile filter.

[0023] Figure 6 The present invention is a partial structural schematic diagram of a connecting circuit board used in a DC electric heater of an automobile filter and a first power-carrying wire, a first connecting circuit board soldering pad, a second connecting circuit board soldering pad and a second power-carrying wire carried on the front side of the connecting circuit board.

[0024] Figure 7 The present invention is a schematic structural diagram of a connecting circuit board used in a DC electric heater of an automobile filter and a third current-carrying wire mounted on the back of the connecting circuit board.

[0025] In the figure: 1, connector; 2, connecting circuit board; 3, bimetallic strip; 4, heating plate; 5, first energized wire; 6, first connecting circuit board pad; 7, second connecting circuit board pad; 8, second energized wire; 9, third energized wire; 11, connector body; 12, connector negative terminal; 13, connector positive terminal; 21, first via; 22, second via; 23, third via; 24, fourth via; 25, fifth via; 26, sixth via; 27, seventh via; 28, eighth via; 29, ninth via; 210, connecting circuit board body; 31, bimetallic strip body; 32, first bimetallic strip terminal; 33, second bimetallic strip terminal; 41, first copper wire; 42, second copper wire; 43, third copper wire; 44, fourth copper wire; 45, heating plate body. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0028] like Figure 1-Figure 7 As shown, a DC electric heater for automobile filter provided by an embodiment of the utility model comprises a connector 1, a connecting circuit board 2 is connected to the surface of the connector 1, a bimetallic strip 3 is arranged on the surface of the connecting circuit board 2, and heating strips 4 are arranged on the four sides of the surface of the connecting circuit board 2;

[0029] The connector 1 comprises a connector body 11, and a connector negative terminal 12 and a connector positive terminal 13 are arranged on the surface of the connector body 11;

[0030] The connecting circuit board 2 includes a connecting circuit board body 210, and the connecting circuit board body 210 is annular, and the four sides of the surface of the connecting circuit board body 210 are all provided with a first through hole 21, a second through hole 22, a third through hole 23 and a fourth through hole 24, and the surface of the connecting circuit board body 210 near the connector 1 is provided with an eighth through hole 28 and a ninth through hole 29, and the surface of the connecting circuit board body 210 near the bimetallic strip 3 is provided with a fifth through hole 25, a sixth through hole 26 and a seventh through hole 27;

[0031] The bimetal strip 3 includes a bimetal strip body 31, and a first bimetal strip terminal 32 and a second bimetal strip terminal 33 are respectively disposed on two sides of the outer side of the bimetal strip body 31;

[0032] The heating plate 4 includes a heating plate body 45, and a first copper wire 41, a second copper wire 42, a third copper wire 43 and a fourth copper wire 44 are arranged on the outer side of the heating plate body 45;

[0033] The front of the connecting circuit board 2 is equipped with a first connecting circuit board pad 6 and a second connecting circuit board pad 7, the first connecting circuit board pad 6 is electrically connected to the first bimetallic terminal 32, and the second connecting circuit board pad 7 is electrically connected to the second bimetallic terminal 33, the first via 21 and the third via 23 are both connected to the third power-carrying wire 9, and the end of the third power-carrying wire 9 away from the first via 21 or the third via 23 is electrically connected to the negative terminal 12 of the connector, the second via 22 and the fourth via 24 are both connected to the second power-carrying wire 8, and the end of the second power-carrying wire 8 away from the second via 22 or the fourth via 24 is electrically connected to the second connecting circuit board pad 7, the outer side of the first connecting circuit board pad 6 is connected to the first power-carrying wire 5, and the end of the first power-carrying wire 5 away from the first connecting circuit board pad 6 is electrically connected to the positive terminal 13 of the connector, and the connection method between the above-mentioned components is soldering electrical connection.

[0034] The bimetallic strip body 31 is installed inside the fifth through hole 25, and the first bimetallic strip terminal 32 and the second bimetallic strip terminal 33 are respectively placed inside the seventh through hole 27 and the sixth through hole 26, the connector positive terminal 13 and the connector negative terminal 12 are respectively placed inside the eighth through hole 28 and the ninth through hole 29, and the first copper wire 41, the second copper wire 42, the third copper wire 43 and the fourth copper wire 44 are respectively placed inside the first through hole 21, the second through hole 22, the third through hole 23 and the fourth through hole 24.

[0035] The heating plate body 45 is a component of an arc-shaped structure and is equidistantly distributed on the surface of the connecting circuit board body 210. The distribution positions of the first copper wire 41, the second copper wire 42, the third copper wire 43 and the fourth copper wire 44 on the heating plate body 45 are adapted to the distribution positions of the first via hole 21, the second via hole 22, the third via hole 23 and the fourth via hole 24 on the connecting circuit board body 210. Through the above-mentioned special position distribution and structural structure, when the heating plate 4 is installed on the connecting circuit board body 210, the first copper wire 41, the second copper wire 42, the third copper wire 43 and the fourth copper wire 44 on the heating plate body 45 can be first inserted into the first via hole 21, the second via hole 22, the third via hole 23 and the fourth via hole 24, and then the first via hole 21, the second via hole 22, the third via hole 23 and the fourth via hole 24 are soldered, thereby greatly improving the assembly efficiency and position accuracy of the connecting circuit board 2 and the heating plate 4.

[0036] In one embodiment of the present utility model, the connector positive terminal 13 of the connector body 11 is electrically connected to the positive terminal of the external power supply, and the connector negative terminal 12 of the connector body 11 is electrically connected to the negative terminal of the external power supply;

[0037] The specific working process of this DC electric heater is as follows:

[0038] When it is necessary to energize the heating plate body 45 on the connecting circuit board 2 to generate heat, turn on the external power switch, and the current flows into the first power-carrying wire 5 through the positive terminal 13 of the connector, and then flows to the first connecting circuit board pad 6 through the first power-carrying wire 5. Since the first connecting circuit board pad 6 and the first power-carrying wire 5 are electrically connected to the first bimetallic terminal 32 and the bimetallic body 31 respectively, the current will flow through the first connecting circuit board pad 6, the first bimetallic terminal 32, and the bimetallic body 31 to the second connecting circuit board pad 7. The wire 8 is electrically connected to the second via 22 and the fourth via 24, so the current will flow to the second via 22 and the fourth via 24 through the two second power-carrying wires 8, and then flow into the second copper wire 42 and the fourth copper wire 44 through the second via 22 and the fourth via 24, and flow out to the first copper wire 41 and the third copper wire 43 through the heating plate body 45. Since the first copper wire 41 and the third copper wire 43 are both electrically connected to the negative terminal 12 of the connector through the third power-carrying wire 9, the current will flow to the negative terminal 12 of the connector through the third power-carrying wire 9, and flow back to the negative terminal of the external power supply.

[0039] Through the above technical solution, the connection method between the heating plate 4 and the connecting circuit board 2 is simpler and more convenient, and through the special connection method and structural structure, the number of soldering times can be reduced and the assembly speed can be accelerated, thereby reducing the difficulty of process manufacturing and reducing the production cost of the DC heater, thereby improving the practicality of the DC electric heater.

[0040] In this embodiment, the heating plate body 45 is made of plastic and carbon fiber materials. The heating plate body 45 made of plastic and carbon fiber materials has the advantages of being light, efficient, high temperature resistant and having excellent thermal conductivity, and further reduces the production cost of the heater.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A DC electric heater for automobile filter, comprising a connector (1), characterized in that: The surface of the connector (1) is connected to a connecting circuit board (2), and a bimetallic strip (3) is provided on the surface of the connecting circuit board (2), and heating strips (4) are provided on the four sides of the surface of the connecting circuit board (2); The connector (1) comprises a connector body (11), and a connector negative terminal (12) and a connector positive terminal (13) are arranged on the surface of the connector body (11); The connecting circuit board (2) comprises a connecting circuit board body (210), and the connecting circuit board body (210) is annular, and the four sides of the surface of the connecting circuit board body (210) are each provided with a first through hole (21), a second through hole (22), a third through hole (23) and a fourth through hole (24); an eighth through hole (28) and a ninth through hole (29) are provided in an area of ​​the surface of the connecting circuit board body (210) close to the connector (1); and a fifth through hole (25), a sixth through hole (26) and a seventh through hole (27) are provided in an area of ​​the surface of the connecting circuit board body (210) close to the bimetallic strip (3); The bimetallic strip (3) comprises a bimetallic strip body (31), and a first bimetallic strip terminal (32) and a second bimetallic strip terminal (33) are respectively arranged on two sides of the outer side of the bimetallic strip body (31); The heating plate (4) comprises a heating plate body (45), and a first copper wire (41), a second copper wire (42), a third copper wire (43) and a fourth copper wire (44) are arranged on the outer side of the heating plate body (45); The front side of the connecting circuit board (2) is provided with a first connecting circuit board solder pad (6) and a second connecting circuit board solder pad (7); the first connecting circuit board solder pad (6) is electrically connected to the first bimetallic terminal (32), and the second connecting circuit board solder pad (7) is electrically connected to the second bimetallic terminal (33); the interior of the first via hole (21) and the third via hole (23) are both connected to a third conducting wire (9), and one end of the third conducting wire (9) away from the first via hole (21) or the third via hole (23) is connected to the connecting The negative terminal (12) of the connector is electrically connected, the inside of the second via hole (22) and the fourth via hole (24) are both connected with a second power-carrying wire (8), and the end of the second power-carrying wire (8) away from the second via hole (22) or the fourth via hole (24) is electrically connected to the second connecting circuit board pad (7), the outer side of the first connecting circuit board pad (6) is connected with a first power-carrying wire (5), and the end of the first power-carrying wire (5) away from the first connecting circuit board pad (6) is electrically connected to the positive terminal (13) of the connector.

2. The DC electric heater used for automobile filter according to claim 1, characterized in that: The bimetallic strip body (31) is installed inside the fifth through hole (25), and the first bimetallic strip terminal (32) and the second bimetallic strip terminal (33) are respectively placed inside the seventh through hole (27) and the sixth through hole (26), the connector positive terminal (13) and the connector negative terminal (12) are respectively placed inside the eighth through hole (28) and the ninth through hole (29), and the first copper wire (41), the second copper wire (42), the third copper wire (43) and the fourth copper wire (44) are respectively placed inside the first through hole (21), the second through hole (22), the third through hole (23) and the fourth through hole (24).

3. The DC electric heater used for automobile filter according to claim 1, characterized in that: The heating plate body (45) is made of plastic and carbon fiber materials.

4. The DC electric heater used for automobile filter according to claim 2, characterized in that: The heating plate body (45) is a component of an arc-shaped structure and is equidistantly distributed on the surface of the connecting circuit board body (210); the distribution positions of the first copper wire (41), the second copper wire (42), the third copper wire (43) and the fourth copper wire (44) on the heating plate body (45) are matched with the distribution positions of the first via hole (21), the second via hole (22), the third via hole (23) and the fourth via hole (24) on the connecting circuit board body (210).

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