Air-heating PTC (Positive Temperature Coefficient) heater with embedded temperature detection function

Abstract

The utility model belongs to the technical field of temperature detection, and particularly relates to an air heating PTC heater with embedded temperature detection, which comprises a temperature sensing head, a heat dissipation strip and a heating core, the temperature sensing head is fixedly connected on the heat dissipation strip, the heat dissipation strip and the heating core are combined into an assembly, the temperature sensing head comprises a detection head used for detecting temperature, and the temperature sensing head is fixedly connected on the heat dissipation strip. The detection head extends into the heat dissipation strip, a detection hole is formed in the heat dissipation strip, one end of the detection hole is open, the detection head is inserted into the detection hole, and at least one part of the outer wall of the detection head is attached to at least one part of the inner wall of the detection hole. The outer wall, located in the detection hole, of the detection head is attached to the inner wall of the detection hole. According to the utility model, the temperature difference between the detection head and the heat dissipation strip and between the detection head and the heating core can be reduced, multi-working-condition calibration is facilitated, setting of a temperature protection recovery threshold is facilitated, and the reliability of temperature protection is provided.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature detection, and in particular relates to an air-heating PTC heater with embedded temperature detection. Background Art

[0002] The air-heating PTC heater is an important accessory of new energy vehicles. In order to reduce the temperature of the air-heating PTC heater, a heat dissipation strip is usually set on the side of the air-heating PTC heater. At the same time, in order to detect the temperature of the air-heating PTC heater and the heat dissipation strip and provide temperature protection when the temperature exceeds the set temperature protection recovery threshold, a temperature sensing head (temperature sensor) needs to be set on the heat dissipation strip for temperature detection;

[0003] However, since the temperature sensing head used in the prior art is usually a surface temperature sensor, the temperature sensing head is fixed on the side of the heat sink through a single end, and there are certain structural requirements on the flatness, i.e., roughness, of the temperature sensor and the bonding surface. In terms of process, it is necessary to apply thermal conductive silicone grease on the bonding surface of the temperature sensor to compensate for the flatness and roughness. Poor flatness and roughness will greatly affect the difference in temperature detection and the reliability of temperature protection. In addition, the temperature difference of the component composed of the temperature sensing head and the heating core of the heat sink is large, which varies greatly under different working conditions, increasing the complexity of the calibration test and making it difficult to set the temperature protection recovery threshold. Utility Model Content

[0004] The purpose of the utility model is to provide a wind-heated PTC heater with embedded temperature detection, which can reduce the temperature difference between the detection head and the heat dissipation strip and the heating core, help with multi-working condition calibration, help with the setting of the temperature protection recovery threshold, and provide reliability of temperature protection.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A wind-heated PTC heater with embedded temperature detection includes a temperature sensing head, a heat dissipation strip and a heating core. The temperature sensing head is fixedly connected to the heat dissipation strip. The heat dissipation strip and the heating core are combined into a component. The temperature sensing head includes a detection head for detecting temperature, and the detection head extends to the interior of the heat dissipation strip.

[0007] Furthermore, a detection hole is provided inside the heat dissipation strip, one end of the detection hole is open, and the detection head is plugged into the detection hole.

[0008] Furthermore, at least a portion of the outer wall of the detection head and at least a portion of the inner wall of the detection hole are in contact with each other.

[0009] Furthermore, the outer wall of the detection head located inside the detection hole is in contact with the inner wall of the detection hole.

[0010] Furthermore, the cross sections of the detection head and the detection hole are both circular.

[0011] Furthermore, one end of the detection head inserted into the detection hole is a hemisphere.

[0012] The technical effects achieved by the utility model are:

[0013] (1) The utility model is a wind-heating PTC heater with embedded temperature detection. By directly extending the detection head into the interior of the heat sink, the temperature difference of the component composed of the heat sink and the heating core is small, and the difference is small under different working conditions. The small temperature difference is helpful for multi-working condition calibration, which helps to set the temperature protection recovery threshold and provide reliability of temperature protection.

[0014] (2) The utility model provides an air-heated PTC heater with embedded temperature detection. By extending the detection head into the interior of the heat dissipation strip, the requirements for the flatness and roughness of the relative fitting surfaces of the temperature sensing head and the heat dissipation strip can be reduced, thereby reducing the difficulty of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a top view structural diagram of the utility model;

[0017] Figure 3 This utility model Figure 2 Sectional view at AA in the middle;

[0018] Figure 4 This utility model Figure 3 A partial enlarged view of point B in the middle.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] 100, temperature sensing head; 101, detection head; 200, heat dissipation strip; 201, detection hole; 300, heating core. Implementation

[0021] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0022] like Figure 1-3As shown, a wind-heating PTC heater with embedded temperature detection includes a temperature sensing head 100, a heat dissipation bar 200 and a heating core 300. The heat dissipation bar 200 and the heating core 300 are bonded and combined into a component. The heat energy of the heating core 300 is transferred to the heat dissipation bar 200.

[0023] Here, the heat dissipation bar 200 is a structure for dissipating heat from the heating core 300 , and it may be a heat dissipation fin or a water-cooled radiator.

[0024] The heating core 300 can be any heating structure, such as a PTC heater.

[0025] The temperature sensing head 100 is fixedly connected to the heat sink 200, and preferably fixed by screws. The temperature sensing head 100 includes a detection head 101 for detecting temperature. The detection head 101 extends into the interior of the heat sink 200 to detect the temperature of the heat sink 200. Since it directly extends into the interior of the heat sink 200, the temperature difference of the component composed of the heat sink 200 and the heating core 300 is small, and the difference is small under different working conditions. The small temperature difference is helpful for multi-working condition calibration, helps to set the temperature protection recovery threshold, and provides reliability of temperature protection. At the same time, by extending the detection head 101 into the interior of the heat sink 200, the requirements for the flatness and roughness of the relative fitting surfaces of the temperature sensing head 100 and the heat sink 200 can be reduced, thereby reducing the processing difficulty.

[0026] Among them, Figure 3-4 As shown, there are many ways to install the detection head 101 into the heat dissipation bar 200, such as a detection hole 201 is opened inside the heat dissipation bar 200, one end of the detection hole 201 is open, and the detection head 101 is inserted into the detection hole 201;

[0027] like Figure 4 As shown, in order to improve the consistency of heat transfer, eliminate the difference in temperature detection, and improve the reliability of temperature protection, at least a portion of the outer wall of the detection head 101 and at least a portion of the inner wall of the detection hole 201 are in contact with each other, and preferably, the outer wall of the detection head 101 located inside the detection hole 201 is in contact with the inner wall of the detection hole 201, so that the heat transfer consistency is better.

[0028] like Figure 4 As shown, in order to facilitate the insertion of the detection head 101 into the detection hole 201, the cross-sections of the detection head 101 and the detection hole 201 are both circular, so that the detection head 101 can be inserted into the detection hole 201 at any angle on the horizontal plane.

[0029] At the same time, one end of the detection head 101 inserted into the detection hole 201 is a hemisphere, and the curvature of the hemisphere makes it easier for the detection head 101 to be inserted into the detection hole 201.

[0030] The working principle of the utility model is: insert the detection head 101 into the interior of the detection hole 201 to monitor the temperature. By directly extending the detection head 101 into the interior of the heat sink 200, the temperature difference of the component composed of the heat sink 200 and the heating core 300 is small, and the difference is small under different working conditions. The small temperature difference is helpful for multi-working condition calibration, and helps to set the temperature protection recovery threshold, and provides the reliability of temperature protection. At the same time, by extending the detection head 101 into the interior of the heat sink 200, the requirements for the flatness and roughness of the relative fitting surfaces of the temperature sensing head 100 and the heat sink 200 can be reduced, thereby reducing the processing difficulty.

[0031] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A wind-heated PTC heater with embedded temperature detection, characterized in that: The invention comprises a temperature sensing head (100), a heat dissipation bar (200) and a heating core (300), wherein the temperature sensing head (100) is fixedly connected to the heat dissipation bar (200), the heat dissipation bar (200) and the heating core (300) are combined into a component, and the temperature sensing head (100) comprises a detection head (101) for detecting temperature, wherein the detection head (101) extends into the interior of the heat dissipation bar (200).

2. The wind-heating PTC heater with embedded temperature detection according to claim 1, characterized in that: A detection hole (201) is provided inside the heat dissipation strip (200), one end of the detection hole (201) is open, and the detection head (101) is plugged into the inside of the detection hole (201).

3. The wind-heating PTC heater with embedded temperature detection according to claim 2, characterized in that: At least a portion of the outer wall of the detection head (101) and at least a portion of the inner wall of the detection hole (201) are in contact with each other.

4. The wind-heating PTC heater with embedded temperature detection according to claim 3, characterized in that: The outer wall of the detection head (101) located inside the detection hole (201) is in contact with the inner wall of the detection hole (201).

5. The wind-heating PTC heater with embedded temperature detection according to claim 2, characterized in that: The cross sections of the detection head (101) and the detection hole (201) are both circular.

6. The wind-heating PTC heater with embedded temperature detection according to claim 5, characterized in that: One end of the detection head (101) inserted into the detection hole (201) is a hemispherical body.

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