CN211576400U - NTC temperature sensor for high-sensitivity anti-current impact type automobile air conditioner - Google Patents

Abstract

The utility model provides a high sensitive anti electric current impact type vehicle air conditioner is with NTC temperature sensor, include NTC chip, aluminum hull and have the lead wire of insulating layer, the NTC chip is established just be located in the aluminum hull the junction of toper casing and cylindrical casing, the NTC chip is fixed through encapsulating the encapsulation of epoxy layer after with pin connection separately, just the aluminum hull with encapsulate epoxy layer and lead wire between fill have the pouring epoxy layer. The utility model provides a high sensitive anti electric current impact type vehicle air conditioner NTC temperature sensor has adopted large size NTC chip, has had decline by a wide margin than the single-ended glass before improving in the cost, when guaranteeing response time, has improved anti electric current impact property, has promoted the life of whole sensor. And a multi-stage packaging structure is adopted, so that the sensing head is tightly attached to a measured object, the measurement precision is high, and the reaction speed is high.

Description

NTC temperature sensor for high-sensitivity anti-current impact type automobile air conditioner

The technical field is as follows:

the utility model relates to a temperature sensor technical field, concretely relates to high sensitive anti-current impact type NTC temperature sensor for vehicle air conditioner.

Background art:

the NTC temperature sensor for the high-sensitivity current impact resistant automobile air conditioner is manufactured by utilizing the characteristic that the resistance value of an NTC thermistor changes along with the temperature through processing technologies such as welding, insulating packaging and the like. The conventional temperature sensor for the automobile air conditioner adopts a single-ended glass-sealed NTC thermistor, and then the thermistor is packaged. The single-end glass-sealed NTC thermistor has high price and small chip size, and the NTC thermistor can be damaged when large current impacts, so that the temperature sensor fails.

The utility model has the following contents:

the utility model aims at prior art's defect, provide a high sensitive anti electric current impact type vehicle air conditioner NTC temperature sensor who can solve above-mentioned problem.

Realize the utility model discloses the technical scheme of purpose is: the utility model provides a high sensitive anti current impact type vehicle air conditioner NTC temperature sensor, includes NTC chip, aluminum hull and has the lead wire of insulating layer, the aluminum hull includes toper casing, cylindrical shell and the turn-ups that connects gradually after to in the past, the diameter of toper casing is crescent from the front to the back, its maximum diameter with the diameter of cylindrical shell equals, the NTC chip is established just be located in the aluminum hull the junction of toper casing and cylindrical shell, the top and the bottom of NTC chip are fixed through encapsulating the encapsulation of encapsulating the epoxy layer respectively through arc connecting wire and separately behind the pin connection, just the aluminum hull with encapsulate the epoxy layer and fill between epoxy layer and the lead wire and have the pouring epoxy layer.

Preferably, the connecting wire is including the segmental arc and the flat section that link to each other, segmental arc NTC chip connection, the flat section with pin connection, when NTC chip and lead wire are connected to the connecting wire, because of the NTC chip is in the position at lead wire extension line middle part, the connecting wire need be bent and is the arc, nevertheless the connecting wire is bent and is easily kick-backed because self thickness is big after, moreover the lead wire receives expend with heat and contract with cold's influence also easily to kick-back, after using a period, the untight phenomenon of junction can appear, in order to avoid this phenomenon, the connecting wire flattens into the platykurtic with forming mechanism with the linkage segment of lead wire, avoid the connecting wire.

Preferably, the NTC chip has a length of 1.7 + -0.3 mm, a width of 1.7 + -0.3 mm and a thickness of 0.5 + -0.1 mm.

Preferably, the lead is a tinned copper wire, the insulating layer on the lead is a PVC layer, and the part of the lead, which is coated by the aluminum shell, is provided with a PVC protective sleeve.

Preferably, the NTC chip, the connecting wire, and one end of the lead wire close to the connecting wire are encapsulated by an encapsulating epoxy layer, and an ellipsoidal encapsulated body is formed after the encapsulating epoxy layer is encapsulated.

The utility model discloses high sensitive anti-current impact type vehicle air conditioner NTC temperature sensor's beneficial effect is:

(1) the thermistor of the sensor adopts the large-size NTC chip, the cost is greatly reduced compared with the single-end glass-sealed NTC thermistor before improvement, the response time is ensured, the current impact resistance is improved, and the service life of the whole sensor is prolonged. The NTC chip is bonded with the lead wire by a dip soldering process.

(2) By adopting a multi-stage packaging structure, the NTC chip is packaged into an ellipsoidal packaging body by using packaging epoxy resin, and then the epoxy resin is filled and poured among the aluminum shell, the packaging epoxy resin layer and the lead wire, so that the sensing head is tightly attached to a measured object, the measurement precision is high, and the reaction speed is high. Compared with the original single-end glass-sealed NTC thermistor structure, the epoxy-packaged NTC chip has small distance with the aluminum shell, fast response time and high sensitivity. The encapsulated epoxy resin layer and the cast epoxy resin layer are waterproof and insulating, are reliable in sealing, have good insulating property and mechanical collision resistance and bending resistance, and can work stably and reliably in various environments for a long time. Can completely meet the requirements of the automobile air conditioner on high-temperature and low-temperature humid environments.

(3) The whole structure assembly can adopt a fully-automatic process, the product performance is stable, and the long-term work can be realized.

Description of the drawings:

figure 1 is a schematic structural diagram of the present invention,

figure 2 is an enlarged schematic view of the circled portion of figure 1,

fig. 3 is a schematic structural diagram of an aluminum case.

In the figure: the novel high-voltage cable comprises an NTC chip, an aluminum shell, a conical shell 21, a cylindrical shell 22, a flanging 23, an encapsulating epoxy layer 3, a lead 4, a PVC protective sleeve 5, a pouring epoxy layer 6, a connecting wire 7, an arc section 71 and a flat section 72.

The specific implementation mode is as follows:

the following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be clearly and clearly defined.

Referring to fig. 1 to 3, a high-sensitivity NTC temperature sensor for an automotive air conditioner of a current surge resistance type includes an NTC chip 1, an aluminum case 2, and a lead 4 with an insulating layer.

The aluminum shell 2 comprises a conical shell 21, a cylindrical shell 22 and a flange 23 which are sequentially connected from front to back, the diameter of the conical shell 21 is gradually increased from front to back, and the maximum diameter of the conical shell is equal to that of the cylindrical shell 22. The NTC chip 1 is arranged in the aluminum shell 2 and is positioned at the connection position of the conical shell 21 and the cylindrical shell 22.

The top and the bottom of the NTC chip 1 are respectively connected with the leads 4 through connecting wires 7 and then are packaged and fixed through the packaging epoxy resin layer 3, and the pouring epoxy resin layer 6 is filled between the aluminum shell 2 and the packaging epoxy resin layer 3 and between the aluminum shell 2 and the leads 4, namely, the pouring epoxy resin is filled in the gaps between the aluminum shell 2 and the packaging epoxy resin layer 3 and between the aluminum shell 2 and the leads 4. According to the multi-stage packaging structure, the NTC chip 1 is packaged into an ellipsoidal packaging body by using the packaging epoxy resin layer 3, and then the epoxy resin layer 6 is filled and poured between the aluminum shell 2 and the packaging epoxy resin layer 3 and between the aluminum shell and the lead 4, so that the sensing head can be attached to a measured object, the measurement precision is high, and the reaction speed is high. And the encapsulating epoxy resin layer 3 and the pouring epoxy resin layer 6 are waterproof and insulating, are sealed reliably, and can completely meet the requirements of the automobile air conditioner on high-temperature and low-temperature humid environments.

The lead 4 is a tinned copper wire, an insulating layer on the lead 4 is a PVC layer, and a PVC protective sleeve 5 is arranged on the lead 4 except for the part coated by the aluminum shell 2. The connecting wire 7 comprises an arc-shaped section 71 and a flat section 72 which are connected, the arc-shaped section 71 is connected with the NTC chip 1, and the flat section 72 is connected with the lead 4. The connection part of the connecting wire 7 and the lead 4 is a flat section.

The NTC chip is large in size, and 1.7 mm +/-0.3 mm in length, 1.7 mm +/-0.3 mm in width and 0.5 mm +/-0.1 mm in thickness.

One end of the NTC chip 1, the connecting wire 7 and the lead wire 4 close to the connecting wire 7 is packaged by the packaging epoxy resin layer 3, and the packaging epoxy resin layer 3 is an ellipsoidal packaging body after being packaged.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims (5)

1. The utility model provides a high sensitive anti current impact type vehicle air conditioner NTC temperature sensor which characterized in that: including NTC chip (1), aluminum hull (2) and lead wire (4) that have the insulating layer, aluminum hull (2) are including preceding conical shell (21), cylindrical shell (22) and turn-ups (23) that connect gradually after to, the diameter of conical shell (21) increases gradually from the front to the back, its maximum diameter with the diameter of cylindrical shell (22) equals, NTC chip (1) is established just be located in aluminum hull (2) the junction of conical shell (21) and cylindrical shell (22), the top and the bottom of NTC chip (1) are connected the back through connecting wire (7) and lead wire (4) separately and are fixed through encapsulating epoxy layer (3) encapsulation, just aluminum hull (2) and encapsulating epoxy layer (3) and lead wire (4) between pack and have pouring epoxy layer (6).

2. The NTC temperature sensor for the vehicle air conditioner of the high-sensitivity current-impact-resistant type according to claim 1, wherein: the connecting wire (7) comprises an arc-shaped section (71) and a flat section (72) which are connected, the arc-shaped section (71) is connected with the NTC chip (1), and the flat section (72) is connected with the lead (4).

3. The NTC temperature sensor for the vehicle air conditioner of the high-sensitivity current-impact-resistant type according to claim 1, wherein: the NTC chip (1) is 1.7 mm plus or minus 0.3mm long, 1.7 mm plus or minus 0.3mm wide and 0.5 mm plus or minus 0.1mm thick.

4. The NTC temperature sensor for the vehicle air conditioner of the high-sensitivity current-impact-resistant type according to claim 1, wherein: the lead (4) is a tinned copper wire, an insulating layer on the lead is a PVC layer, and a PVC protective sleeve (5) is arranged on the lead (4) except for the part coated by the aluminum shell.

5. The NTC temperature sensor for the vehicle air conditioner of the high-sensitivity current-impact-resistant type according to claim 1, wherein: one end of the NTC chip (1), one end of the connecting wire (7) and one end of the lead (4) close to the connecting wire (7) are encapsulated by an encapsulating epoxy resin layer (3), and the encapsulating epoxy resin layer (3) is an ellipsoidal encapsulating body after encapsulation.

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