Efficient heating pack unit for electric heater

Abstract

The utility model relates to the technical field of automobile electric appliance parts, and discloses a high-efficiency heating bag group unit for an electric heater, which comprises a U-shaped sheet, a PTC heating bag and a radiator, the U-shaped sheet is clamped at the outer side of the PTC heating bag, the section of the U-shaped sheet is of a U-shaped structure, the middle of the bottom surface of the U-shaped sheet is provided with an upwards concave arc-shaped part I, and the arc-shaped part II is provided with a convex arc-shaped part II. A concave arc-shaped part II and a concave arc-shaped part III are respectively arranged on the two sides of the bottom in the U-shaped sheet and are distributed on the two sides of the arc-shaped part I; the section of the U-shaped sheet is of a U-shaped structure, and the arc-shaped part I, the arc-shaped part II and the arc-shaped part III are arranged at the bottom of the U-shaped sheet, so that the arc-shaped characteristic of the bottom is easy to deform due to external force, the PTC heating bag is tightly attached and connected with the groove of the radiator, the assembly is simple, the heat transfer efficiency is high, the damage of the insulating heat-conducting pad can be avoided, and the service life is prolonged. And the U-shaped sheet is integrally constructed, so that the operation and the assembly are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile electrical components, in particular to a high-efficiency heating package group unit for an electric heater. Background Art

[0002] PTC is the abbreviation of Positive Temperature Coefficient. PTC resistors are a type of semiconductor ceramics based on barium titanate (BaTiO3), strontium titanate (SrTiO3), and lead titanate (PbTiO3). This ceramic has low resistance at low temperatures; but when the temperature is above a certain temperature (called the Curie temperature Tc), its own resistance rises sharply by 3-8 orders of magnitude (103-108 times), and the resistor has a large positive temperature coefficient. Radiator is a general term for a series of devices used to conduct and release heat. PTC resistors convert electrical energy into thermal energy, and then take away the heat through the coolant in the radiator flow channel to achieve heating of the entire vehicle cockpit or battery pack.

[0003] In the prior art, the PTC heating pack and the radiator slot are usually fastened by a metal gasket plus a wedge-shaped piece or a potting glue. This method is complicated to assemble and has low heat transfer efficiency. At the same time, the complicated assembly can easily cause the insulating thermal pad wrapped around the outside of the PTC heating pack to be damaged, which may cause serious safety accidents in the product. Utility Model Content

[0004] In order to solve the problem that the assembly method of the PTC heating pack and the radiator slot in the above prior art is complicated, the heat transfer efficiency is low, and the complicated assembly easily causes the insulation thermal pad wrapped outside the PTC heating pack to be damaged, which may cause serious safety accidents of the product, the utility model is implemented through the following technical scheme: a high-efficiency heating pack assembly unit for an electric heater, comprising a U-shaped sheet, a PTC heating pack, and a radiator, the U-shaped sheet is clamped on the outside of the PTC heating pack, the cross-section of the U-shaped sheet is a U-shaped structure, the middle of the bottom surface of the U-shaped sheet is provided with an upward concave arc portion 1, and the bottom sides of the inside of the U-shaped sheet are respectively provided with a downward concave arc portion 2 and an arc portion 3, and the arc portion 2 and the arc portion 3 are distributed on both sides of the arc portion 1;

[0005] The radiator is provided with a groove inside, and the U-shaped sheet is matched with the groove. The U-shaped sheet is tightly fitted into the groove of the radiator by applying a certain downward pressure. When the U-shaped sheet is pressed down to be inserted into the groove, the lateral force exerted on the U-shaped sheet by the inner wall of the groove squeezes and deforms the arc-shaped portion one, arc-shaped portion two and arc-shaped portion three, thereby realizing a tight fitting connection between the PTC heating pack and the radiator.

[0006] Furthermore, the outer walls on both sides of the U-shaped piece are provided with a tapered portion 1, and the inner wall of the groove is provided with a tapered portion 2. When the U-shaped piece is inserted into the groove of the radiator, the tapered portion 1 is matched with the tapered portion 2. The setting of the tapered portion 1 and the tapered portion 2 facilitates the inner wall of the groove to generate a lateral force on the U-shaped piece.

[0007] Furthermore, the tapers of the first tapered portion and the second tapered portion are not less than 1°, thereby ensuring the effect of the lateral force generated by the groove on the U-shaped sheet.

[0008] Furthermore, the PTC heating pack includes at least one PTC resistor, and a positive electrode sheet and a negative electrode sheet are respectively installed on both sides of the PTC resistor. The sides of the PTC resistor, the positive electrode sheet and the negative electrode sheet are filled with silicone rubber, and the sides are insulated and isolated by silicone rubber.

[0009] Furthermore, the surface of the positive electrode sheet and the negative electrode sheet on one side away from the PTC resistor sheet is wrapped with an insulating thermal conductive pad, and insulation isolation and heat conduction are performed through the insulating thermal conductive pad.

[0010] Furthermore, the U-shaped piece is an integrally formed structural member, and the U-shaped piece is made of aluminum alloy and is integrally formed through extrusion, stretching and stamping processes, which is convenient for operation and assembly.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The U-shaped piece in the utility model has a U-shaped cross-section, and arc-shaped portion one, arc-shaped portion two and arc-shaped portion three are arranged at the bottom, so that the arc-shaped feature of the bottom is easily deformed by external force, thereby tightly fitting and connecting the PTC heating pack and the groove of the radiator, which is simple to assemble and has high heat transfer efficiency. At the same time, the insulation thermal pad can be avoided from being damaged. The overall structure of the U-shaped piece is integrated, which is convenient for operation and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the heating pack unit of the utility model;

[0014] Figure 2 For this utility model Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0015] Figure 3 It is a three-dimensional diagram of the matching structure of the heating package unit and the radiator of the utility model.

[0016] In the figure: 1, U-shaped sheet; 2, PTC heating pack; 3, arc portion 1; 4, arc portion 2; 5, arc portion 3; 6, tapered portion 1; 7, insulating thermal pad; 8, positive electrode sheet; 9, negative electrode sheet; 10, PTC resistor sheet; 11, silicone rubber; 12, heat sink; 13, tapered portion 2. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] The embodiment of the high-efficiency heating pack group unit for the electric heater is as follows:

[0019] See also Figure 1-Figure 3 A high-efficiency heating pack group unit for an electric heater includes a U-shaped sheet 1, a PTC heating pack 2, and a radiator 12. The U-shaped sheet 1 has a U-shaped cross-section. The U-shaped sheet 1 is made of aluminum alloy and is integrally formed through extrusion, stretching and stamping processes. It is convenient for operation and assembly. The U-shaped sheet 1 is clamped on the outside of the PTC heating pack 2.

[0020] There is an arc-shaped portion 3 in the middle of the bottom surface of the U-shaped sheet 1, and the arc-shaped portion 3 is recessed toward the inner side of the U-shaped sheet 1. There are an arc-shaped portion 2 4 and an arc-shaped portion 3 5 on both sides of the bottom inside the U-shaped sheet 1, respectively. The arc-shaped portion 2 4 and the arc-shaped portion 3 5 are recessed in opposite directions to the arc-shaped portion 1 3. The arc-shaped portion 2 4 and the arc-shaped portion 3 5 are distributed on both sides of the arc-shaped portion 1 3. The combined design of the arc-shaped portion 1 3, the arc-shaped portion 2 4 and the arc-shaped portion 3 5 makes the arc-shaped feature of the bottom of the U-shaped sheet 1 easily deformed by external force, thereby tightly fitting and connecting the PTC heating pack 2 to the groove of the radiator 12.

[0021] The outer walls on both sides of the U-shaped sheet 1 form a certain tapered portion 6, with a taper ≥1°, and the inner wall of the groove of the radiator 12 also forms a certain tapered portion 13, with a taper ≥1°. After applying a certain downward pressure, the U-shaped sheet 1 is tightly fitted into the groove of the radiator 12. During the downward pressing process, the U-shaped sheet 1 is squeezed and deformed by the lateral force of the inner wall of the groove of the radiator 12 to achieve a tight fitting connection between the PTC heating pack 2 and the radiator 12.

[0022] The PTC heating pack 2 includes at least one PTC resistor 10, with a positive electrode sheet 8 and a negative electrode sheet 9 attached to the two sides of the PTC resistor 10 respectively, and is insulated and isolated by silicone rubber 11 all around, and a layer of insulating thermal pad 7 is wrapped on both sides, and the insulating thermal pad 7 is used in the middle for insulation isolation and heat conduction.

[0023] Heating pack unit combination and working principle:

[0024] At least one PTC resistor 10 is bonded to the positive electrode sheet 8 and the negative electrode sheet 9 with silicone rubber 11 on both sides, and then wrapped with an insulating thermal pad 7 on the outside, and then clamped by the U-shaped sheet 1 to form a unit body.

[0025] The U-shaped sheet 1 clamps the PTC heating pack 2 and is then placed into the groove of the radiator 12. A certain downward pressure is applied to make the PTC heating pack 2 and the radiator 12 fit tightly together, so that the heat energy generated by the PTC resistor 10 is efficiently and quickly transferred to the radiator 12, and then carried away by the coolant in the internal flow channel of the radiator 12. The electrical power of the product can be effectively converted into thermal power, thereby realizing heating of the entire vehicle cockpit or battery pack.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency heating pack assembly unit for an electric heater, comprising a U-shaped sheet (1), a PTC heating pack (2), and a radiator (12), wherein the U-shaped sheet (1) is clamped on the outside of the PTC heating pack (2), and characterized in that: The cross section of the U-shaped sheet (1) is a U-shaped structure, an upwardly concave arc-shaped portion 1 (3) is provided in the middle of the bottom surface of the U-shaped sheet (1), and downwardly concave arc-shaped portions 2 (4) and 3 (5) are provided on both sides of the bottom of the U-shaped sheet (1), respectively, and the arc-shaped portions 2 (4) and 3 (5) are distributed on both sides of the arc-shaped portion 1 (3); The heat sink (12) is provided with a groove cavity inside, and the U-shaped sheet (1) is adapted to the groove cavity. When the U-shaped sheet (1) is pressed down and inserted into the groove cavity, the lateral force exerted on the U-shaped sheet (1) by the inner wall of the groove cavity causes the arc-shaped portion 1 (3), the arc-shaped portion 2 (4) and the arc-shaped portion 3 (5) to be squeezed and deformed, thereby achieving a tight fitting connection between the PTC heating pack (2) and the heat sink (12).

2. The high-efficiency heating pack assembly unit for an electric heater according to claim 1, characterized in that: The outer walls of both sides of the U-shaped sheet (1) are provided with a tapered portion 1 (6), and the inner wall of the groove is provided with a tapered portion 2 (13). When the U-shaped sheet (1) is inserted into the groove of the heat sink (12), the tapered portion 1 (6) is matched with the tapered portion 2 (13).

3. The high-efficiency heating pack assembly unit for an electric heater according to claim 2, characterized in that: The tapers of the taper portion 1 (6) and the taper portion 2 (13) are both not less than 1°.

4. A high-efficiency heating pack assembly unit for an electric heater according to any one of claims 1 to 3, characterized in that: The PTC heating pack (2) comprises at least one PTC resistor (10), a positive electrode sheet (8) and a negative electrode sheet (9) are respectively mounted on both sides of the PTC resistor (10), and the sides of the PTC resistor (10), the positive electrode sheet (8) and the negative electrode sheet (9) are filled with silicone rubber (11).

5. The high-efficiency heating pack assembly unit for an electric heater according to claim 4, characterized in that: The surfaces of the positive electrode sheet (8) and the negative electrode sheet (9) on one side away from the PTC resistor sheet (10) are wrapped with an insulating heat-conducting pad (7).

6. The high-efficiency heating pack assembly unit for an electric heater according to claim 5, characterized in that: The U-shaped piece (1) is an integrally formed structural component.

Images