CN204180283U - The ptc heater of electric automobile air-conditioning system - Google Patents

Abstract

The utility model relates to the ptc heater of electric automobile air-conditioning system, comprise heat conduction casing and be arranged at multiple PTC calandrias of heat conduction box house, PTC calandria comprises PTC heating core, installation frame, insulating barrier and at least two layers of electrode slice, electrode slice is arranged at the surface of PTC heating core successively from inside to outside, and the surface inclination set angle of outermost electrode slice and PTC heating core is arranged.Relative to prior art, PTC calandria not only well solves the heating of the inside of electric automobile under cryogenic and the heat source required for wind screen defrosting, and ensure that the security performance of electric automobile due to its excellent insulation property.Meanwhile, the surface inclination set angle of outermost electrode slice and PTC heating core is arranged, and is convenient to PTC calandria on the one hand and is installed in heat conduction casing, also ensure that the stability of structure on the other hand, improves anti-shake performance.

Description

PTC Heater for Electric Vehicle Air Conditioning System

technical field

The utility model belongs to the field of PTC heating, in particular to a PTC heater for an electric vehicle air conditioning system.

Background technique

Existing fuel vehicles generally utilize an independent heat source type (fuel oil) heating system or a waste heat type (using engine cooling water or exhaust gas waste heat) heating system. These two kinds of vehicle heating and heating systems all need to rely on the engine of the vehicle, while electric vehicles have no engine and require an independent heat source for heating.

The use environment of the heater in the field of electric vehicles has the following characteristics: first, the working voltage is high, at least above 320V; second, the voltage fluctuation range is large, above 200V; third, because the car is used outdoors, the temperature and humidity of the four seasons change The fourth is that the heater is installed in the car and needs better anti-vibration performance, and the service life is required to be more than ten years; the fifth is to ensure that the electric car is wading, encountering rain or partial The safety performance in extreme environments such as immersion requires that the waterproof performance of the PTC heater should reach IPX7, so as to avoid accidental injury caused by electric shock to people in or around the car, because the voltage of electric vehicles is very high, and the damage caused by leakage will more serious. At present, because electric vehicles have not yet entered mass production, there are few similar products. The disadvantage of existing heaters is that the temperature inside the vehicle rises rapidly and unevenly. The air is too dry.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art and provide a PTC heater for the air-conditioning system of an electric vehicle.

The technical solution for realizing the purpose of this utility model is: the PTC heater of the air-conditioning system of the electric vehicle, comprising:

The heat conduction box, any two parallel side walls of the heat conduction box are respectively provided with a plurality of parallel installation grooves;

A plurality of PTC heating bodies, including a PTC heating core, an installation frame, an insulating layer and at least two layers of electrode sheets, the PTC heating core is arranged on the installation frame, the electrode sheets are arranged on the surface of the PTC heating core from inside to outside, and the insulating layer covers On the surface of the outermost electrode sheet, the outermost electrode sheet and the surface of the PTC heating core are set at an inclined angle. T-shaped structure composed of sheets, the mounting sheet of each outermost electrode sheet is located on the same side of the PTC heating core, and the side of the PTC heating body provided with the mounting sheet is set in the mounting groove.

Compared with the existing technology, the PTC heating body heats and transfers heat to the antifreeze, and the antifreeze transfers heat to the evaporator, and finally provides warm air to the car. Due to the unique positive temperature coefficient temperature resistance characteristic of the PTC heating body, it has automatic Excellent electrical properties such as temperature control, small influence of temperature with voltage fluctuations, and safety features such as no burning and no open flames, not only solve the heat source problem required for internal heating and windshield defrosting of electric vehicles under low temperature conditions , and because of its excellent insulation performance, it ensures the safety performance of electric vehicles. At the same time, the surface of the outermost electrode piece and the PTC heating core is set at an inclined angle, which on the one hand facilitates the installation of the PTC heating body in the heat conduction box, on the other hand ensures the stability of the structure and improves the anti-vibration performance.

On the basis of the above-mentioned technical scheme, the following improvements can also be made:

As a preferred solution, the above-mentioned installation grooves are arranged parallel and staggered.

With the above preferred solution, the installation grooves are arranged parallel and staggered, which increases the heat conduction area and improves the heating effect of the antifreeze.

As a preferred solution, the above-mentioned PTC heating core includes a plurality of PTC heating sheets arranged on the same plane.

Using the above-mentioned preferred scheme, the PTC heating core is composed of multiple PTC heating sheets, which avoids deformation of large-sized PTC heating sheets during sintering, and at the same time, prevents the PTC heating body from being damaged by the surface of the PTC heating sheet when it is installed on the heat conduction box. If the unevenness is crushed, it will affect the heating effect and affect the insulation, thus bringing about safety hazards.

As a preferred solution, the above-mentioned installation frame is an insulating frame.

With the above preferred solution, the installation frame is an insulating frame, which further ensures the insulation between the PTC heating plates, thereby improving the safety performance.

As a preferred solution, the above-mentioned installation frame is a silicone frame.

Using the above preferred solution, the installation frame is a silicone frame, on the one hand to ensure the insulation of the PTC heater, and on the other hand to ensure that the PTC heater will not be deformed, thereby improving safety performance.

As a preferred solution, the above-mentioned pole piece is an aluminum electrode piece and/or a copper electrode piece.

By adopting the above-mentioned preferred scheme, the conductivity of the aluminum electrode sheet or the copper electrode sheet is better, so that the PTC heating body can be in good contact with the heat conduction box, and the heat conduction performance can be improved.

As a preferred solution, a heat-conducting silica gel layer is also provided on the surface of the above-mentioned insulating layer.

Using the above preferred solution, add a thermally conductive silica gel layer to further improve the insulation performance on the basis of ensuring thermal conductivity.

Description of drawings

In order to make the content of the utility model easier to understand clearly, the utility model will be further described in detail according to specific embodiments below in conjunction with the accompanying drawings, wherein:

Fig. 1 is the structural representation of the utility model.

Fig. 2 is an exploded structure diagram of the utility model PTC heating body.

Fig. 3 is a schematic structural view of the heat conduction box of the present invention.

Fig. 4 is a schematic diagram of the three-dimensional structure of the utility model.

Among them: 10. Heat conduction box, 11. Installation groove, 20. PTC heating body, 30. Second electrode sheet, 40. First electrode sheet, 50. PTC heating core, 60. Installation frame, 70. Insulation layer.

Detailed ways

Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

In order to achieve the purpose of the present invention, as shown in Figures 1-4, in one embodiment of the present invention, the PTC heater of the electric vehicle air conditioning system includes:

The heat conduction box 10 is provided with nine parallel installation grooves 11 on two mutually parallel side walls of the heat conduction box 10;

Nine PTC heating bodies 20, the PTC heating body 20 includes a PTC heating core 5, a mounting frame 60, a first electrode sheet 40, a second electrode sheet 30 and an insulating layer 70, the PTC heating core 50 is arranged on the mounting frame 60, the first The electrode sheet 40 and the second electrode sheet 30 are sequentially arranged on both side surfaces of the PTC heating core 50 from inside to outside, the insulating layer 70 is coated on the outer surface of the second electrode sheet 30, and the second electrode sheet 30 and the PTC heating core 50 The surface is inclined to set an angle, and the second electrode sheet 30 includes a T-shaped structure composed of an electrode sheet arranged on the surface of the PTC heating core 50 and a mounting sheet extending to one side along the electrode sheet, and each second electrode sheet 30 The mounting piece is located on the same side of the PTC heating core 50 , and the side of the PTC heating body 20 provided with the mounting piece is set in the mounting groove 11 .

Compared with the prior art, the PTC heating body 20 heats and transfers heat from the heat conduction box 10 to the antifreeze liquid, and the antifreeze liquid transfers heat to the evaporator, and finally provides warm air to the interior of the car. Due to the unique positive temperature coefficient of the PTC heating body 20 Temperature resistance characteristics, it has excellent electrical properties such as automatic temperature control, small influence of temperature with voltage fluctuations, and safety features such as no burning and no open flames, not only a good solution to the internal heating and windshield of electric vehicles under low temperature conditions The heat source problem required for defrosting, and because of its excellent insulation performance, the safety performance of electric vehicles is ensured. At the same time, the surface inclination angle between the second electrode sheet 30 and the PTC heating core 50 is set to be 10° to 45°, preferably 30° in this embodiment. On the one hand, on the basis of not adding other fixed connection structures, it is convenient for the PTC heating body 20 Installed in the heat conduction box 10, on the other hand, it is arranged obliquely so that the PTC heating body 20 is closely connected to the installation groove 11, which ensures the stability of the structure and improves the anti-vibration performance.

The installation grooves 11 provided in this embodiment are arranged parallel and staggered, which can increase the heat conduction area and improve the heating effect of the antifreeze.

The PTC heating core 50 provided in this embodiment includes six PTC heating chips arranged on the same plane. The PTC heating core 50 is composed of a plurality of PTC heating sheets, which avoids deformation of large-sized PTC heating sheets during sintering, and at the same time, prevents the PTC heating element 20 from being pressed due to the uneven surface of the PTC heating sheet when it is installed on the heat conduction box 10. If it is broken, it will affect the heating effect and affect the insulation, which will bring safety hazards.

The installation frame 60 provided in this embodiment is an insulating frame. According to the actual situation, it can be selected that the installation frame 60 is a silicone frame. On the one hand, it ensures the insulation of the PTC heating sheet, and on the other hand, it ensures that the PTC heating sheet will not be deformed, thereby improving safety performance.

The first electrode sheet 40 provided in this embodiment is a copper electrode sheet, and the second electrode sheet 30 is an aluminum electrode sheet. The aluminum electrode sheet or the copper electrode sheet has good electrical conductivity, which can make the PTC heating body 20 in good contact with the heat conduction box 10 and improve the heat conduction performance.

In order to further optimize the implementation effect of the present invention, in another embodiment of the present invention, on the basis of the foregoing, the surface of the above-mentioned insulating layer 70 is further provided with a thermally conductive silica gel layer.

Using the above preferred solution, add a thermally conductive silica gel layer to further improve the insulation performance on the basis of ensuring thermal conductivity.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. It should be understood that the above descriptions are only specific embodiments of the present utility model and are not intended to limit the present invention. For the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (7)

1. the ptc heater of electric automobile air-conditioning system, is characterized in that, comprising:

Heat conduction casing, wantonly two sidewalls be parallel to each other of described heat conduction casing are respectively arranged with multiple installation groove parallel to each other;

And be arranged at multiple PTC calandrias of described heat conduction box house, it comprises PTC heating core, installation frame, insulating barrier and at least two layers of electrode slice, described PTC heating core is arranged on described installation frame, described electrode slice is arranged at the surface of described PTC heating core successively from inside to outside, described insulating barrier is coated on the surface of outermost electrode slice, the surface inclination set angle of described outermost electrode slice and described PTC heating core is arranged, described outermost electrode slice comprises by the electrode slice being arranged at described PTC heating core surface and the T-type structure formed along the installation sheet that electrode slice is extended to side, the installation sheet of each outermost electrode slice is positioned at the same side of described PTC heating core, the side that described PTC calandria is provided with installation sheet is arranged in described installation groove.

2. the ptc heater of electric automobile air-conditioning system according to claim 1, is characterized in that, described installation indention parallel is crisscross arranged.

3. the ptc heater of electric automobile air-conditioning system according to claim 1, is characterized in that, described PTC heating core comprises multiple PTC heating plate be arranged on same plane.

4. the ptc heater of electric automobile air-conditioning system according to claim 1, is characterized in that, described installation frame is Insulating frame.

5. the ptc heater of electric automobile air-conditioning system according to claim 4, is characterized in that, described installation frame is silica gel framework.

6. the ptc heater of electric automobile air-conditioning system according to claim 1, is characterized in that, described electrode slice is aluminium electrode slice and/or copper electrode sheet.

7. the ptc heater of electric automobile air-conditioning system according to claim 1, is characterized in that, described insulating barrier outer surface is also provided with thermal conductive silicon glue-line.