CN214471394U

CN214471394U - Folding air duct temperature sensor

Info

Publication number: CN214471394U
Application number: CN202023277470.2U
Authority: CN
Inventors: 陈新华; 张先锋; 李鄂胜
Original assignee: Hubei Kait Automotive Electronic & Electrical Systems Co ltd
Current assignee: Hubei Kait Automotive Electronic & Electrical Systems Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-10-22
Anticipated expiration: 2030-12-29

Abstract

The utility model relates to a folding air duct temperature sensor, which comprises a thermistor, a lead and a shell, wherein one end of the lead is fixedly connected with the thermistor; the shell comprises a first shell, a bending part and a second shell which are sequentially connected, the first shell and the second shell are buckled to form an accommodating cavity, and a lead is arranged in the accommodating cavity; the first shell is provided with a first vent hole; the second shell is provided with a second ventilation hole. The utility model discloses during production, produce thermistor and wire alone earlier and assemble, during the first casing of reload, crooked kink and folding shell, the first casing of lock and second casing have just accomplished the equipment of sensor. Compare traditional wire and integrative moulding plastics of shell, the utility model discloses a wire thermistor and the production mode of shell equipment, furthest has avoided wire, thermistor because of the high temperature damage that leads to of moulding plastics, break, has also improved production efficiency simultaneously, has guaranteed the uniformity of product, has promoted the competitiveness of product.

Description

Folding air duct temperature sensor

Technical Field

The utility model relates to a sensor technical field especially relates to a foldable wind channel temperature sensor.

Background

The automobile air conditioner air duct temperature sensor is a sensing device which senses air duct temperature signals and feeds collected signals back to the control module to adjust an automobile heating, refrigerating and air purifying system in due time. Most of the existing temperature sensors integrate a plurality of parts such as a temperature probe, a wire harness, a mounting seat, a corrugated pipe, heat conducting grease, a control chip, fan blades, a protective sleeve and the like. Therefore, when the sensor is produced, integral one-time injection molding is needed, specifically: parts such as a lead, a thermistor and a chip which are positioned inside the sensor are processed and assembled separately, then the parts are placed into a mold for injection molding, glue is directly injected to a part to be packaged of the sensor assembly in a step-by-step glue injection mode, and finally a plastic shell capable of directly wrapping the part to be packaged is formed, so that the packaging of the sensor assembly is completed.

However, the structure and the production mode have the following defects:

1. because the air duct temperature sensor is generally longer, and the positioning of the sensor, the lead group and other components is considered when designing the mold, the mold is difficult to process, the mold precision is low, and the size precision of the injection molded product is low;

2. when the shell and the internal sensor assembly are integrally formed, the problem that the lead is easily damaged by pressing is easily caused, and the thermistor is often damaged by high-temperature injection molding;

3. when the sensor assembly is installed, the positioning operation needs to be carried out manually and frequently, so that the consistency of products cannot be guaranteed, and the production period is prolonged.

SUMMERY OF THE UTILITY MODEL

In view of the above, a need exists for a foldable duct temperature sensor, which solves the problems of complicated production process, long time consumption and low yield of the conventional sensor.

The utility model provides a foldable wind channel temperature sensor, include:

a thermistor;

one end of the lead is fixedly connected with the thermistor;

the shell comprises a first shell, a bending part and a second shell which are sequentially connected, the first shell and the second shell are buckled to form an accommodating cavity, and a lead is arranged in the accommodating cavity; a first ventilation hole is formed in the first shell, and the projection of the thermistor on the first shell is located in the range of the first ventilation hole; a second ventilation hole is formed in the second shell, and the projection of the thermistor on the second shell is located in the range of the second ventilation hole.

Optionally, the first housing includes a first extension portion and a first probe portion, and the second housing includes a second extension portion and a second probe portion; a partition plate is arranged between the first extending part and the first detecting part, the first extending part, the second extending part and the partition plate surround to form a closed space, and one end of a lead penetrates through the partition plate; the first ventilation hole is located first detection portion, and the second ventilation hole is located the second detection portion.

Optionally, a plurality of connectors are formed in the first extension portion, a plurality of connecting buckles are formed in the second extension portion, and the connecting buckles and the connectors are connected in a one-to-one matching mode.

Optionally, the first detection portion and the second detection portion are both arc-shaped plates, and the first detection portion and the second detection portion surround to form a flow passage.

Optionally, a plurality of limiting rods are fixedly connected in the first extending portion, and the limiting rods are abutted to the conducting wires.

Optionally, still include the inserted sheet, the other end of inserted sheet fixed connection wire, the inserted sheet passes first casing and extends to holding the chamber outside.

Optionally, the other end of the wire is wound on the inserting piece, and the part of the wire wound on the inserting piece is fixedly connected with the inserting piece through welding.

Optionally, the shell further comprises a protective shell, the protective shell is square and cylindrical, the protective shell is fixedly connected with the first shell, the protective shell surrounds the portion, located outside the accommodating cavity, of the inserting sheet, and the axis of the protective shell is identical to the extending direction of the inserting sheet.

Optionally, the housing is a one-piece injection molded part.

The utility model provides a pair of foldable wind channel temperature sensor earlier produces thermistor and wire alone and assembles, packs into first casing again in the lump, through crooked kink and folding shell, makes first casing and second casing lock, has just accomplished the equipment of sensor. The first ventilation hole and the second ventilation hole ensure that the thermistor is in good contact with air, so that the sensor is sensitive and accurate. Compare traditional wire and the integrative mode of moulding plastics of shell, the utility model discloses a wire thermistor and the production mode of shell equipment, furthest has avoided wire, thermistor because of the high temperature damage that leads to of moulding plastics, breaks, also makes the design of the mould of usefulness of moulding plastics simpler, the process of the continuous clamping part when also having saved production simultaneously has improved production efficiency, has guaranteed the uniformity of product, has promoted the competitiveness of product.

Drawings

Fig. 1 is an expanded view of a foldable air duct temperature sensor according to a first embodiment of the present invention;

fig. 2 is a perspective view of a foldable air duct temperature sensor according to a first embodiment of the present invention.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

With reference to fig. 1-2, an embodiment of the present invention provides a foldable air duct temperature sensor, which includes a thermistor 1, a wire 2, an insert 3 and a housing 4. The thermistor 1 is a temperature-sensitive element, and can show different resistance values at different temperatures, and the NTC thermistor is selected in this embodiment and has a plurality of pins. The wire 2 is used for electrically connecting the thermistor 1 with an ECU of the automobile, and feeding back the resistance information of the thermistor 1 to the ECU of the automobile, so as to automatically control the air conditioner to perform heating or refrigerating actions. Because the thermistor 1 in this embodiment has two pins, correspondingly, the number of the wires 2 is also two, and one end of each wire 2 is fixedly connected to one of the pins of the thermistor 1. The number of the inserting pieces 3 in the embodiment is also two, and the other end of each wire 2 is fixedly connected to one inserting piece 3. The housing 4 includes a first shell 41, a bending portion 42, and a second shell 43 connected in sequence. First casing 41 and second casing 43 are buckled mutually and are formed and hold the chamber, and wire 2 and thermistor 1 all are located and hold the intracavity, have two sockets on the first casing 41, and two inserted sheets 3 are inserted respectively and are established in two sockets and extend the casing, and two inserted sheets 3 are conductive metal material and make, and two inserted sheets 3 form the structure of public plug, and it can insert the control interface on the car, couples together thermistor 1 and ECU. The first housing 41 includes a first extending portion 411 and a first detecting portion 412, wherein the first detecting portion 412 is opened with a first ventilation hole 413, and the projection of the thermistor 1 on the first housing 41 is located within the range of the first ventilation hole 413; the second housing 43 includes a second extending portion 431 and a second detecting portion 432, wherein the second detecting portion 432 is provided with a second vent hole 433, and the projection of the thermistor 1 on the second housing 43 is located within the range of the second vent hole 433, because the present embodiment is mainly used for detecting the temperature in the air duct, the first vent hole 413 and the second vent hole 433 enable sufficient air flow around the thermistor 1, thereby improving the accuracy and sensitivity of the sensor. The housing 4 in this embodiment is a one-piece injection molded part in which the bent portion 42 is slightly thinner so that it can be bent. During the manufacturing process, connect or purchase current combination processing finished product earlier between thermistor 1, wire 2 and inserted sheet 3, treat shell 4 through the mode integrated into one piece back of moulding plastics, alright insert 3 insert locate the socket in, crooked kink 42, folding shell 4, including first casing 41 and second casing 43 lock and seal thermistor 1 and wire 2, just so accomplished the equipment of sensor.

It should be noted that, in actual implementation, the type of the thermistor 1 is not limited to the NTC in the present embodiment, and may be replaced with another type, such as PTC, as needed. However, it should be noted that the resistance of the NTC thermistor is inversely related to the temperature, that is, as the temperature rises, the resistance of the thermistor 1 decreases, and the variation characteristic of the PTC thermistor is opposite, so when different thermistor types are selected, the ECU of the vehicle also needs to match the selected thermistor characteristics to design a corresponding control algorithm, and similarly, the appropriate thermistor type can be selected inversely according to the existing control algorithm. In addition, the thermistor 1 in the present embodiment is connected to the ECU or the control unit of the vehicle through the wire 2 and the plug 3, and in the actual design, if there is no need to attach or detach the sensor, the wire 2 can be used to directly connect the thermistor 1 to the ECU of the vehicle, so as to improve the integration level of the sensor and the air conditioner. Similarly, depending on the actual situation, for example, when the capacity of the enterprise is sufficient, the first housing 41 and the second housing 43 may be manufactured separately, and the assembly of the sensor may still be completed.

Further, the other end of each wire 2 in the present embodiment is wound around its corresponding tab 3 and connected by welding. Compare in connector connections such as traditional overlap joint mode or fastener, the mode of this embodiment makes wire 2 and inserted sheet 3 between have more area of contact, has so not only strengthened the electric conductivity, still make to connect more firm, can not become flexible under the condition of vehicle vibrations, and then make the sensor operation more stable.

Further, a partition 414 is disposed between the first extending portion 411 and the first detecting portion 412 in this embodiment, and the first extending portion 411, the second extending portion 431 and the partition 414 surround to form a closed space. The first extension portion 411 and the second extension portion 431 are both of a linearly extending elongated groove structure, the inner groove thereof is a wire groove, three limiting rods 415 are further arranged in the first extension portion 411, the wire 2 is arranged in the wire groove and is positioned by the three limiting rods 415, and simultaneously one end of the wire 2 connected with the thermistor 1 passes through the partition plate 414, so that the thermistor 1 is located in a space surrounded by the first detection portion 412 and the second detection portion 432. In this embodiment, extend thermistor 1 into the deeper inside in the wind channel through the extension to survey more accurate temperature, avoid the temperature dead angle, thereby reach better detection effect. It should be noted that the number of the limiting rods 415 can be adjusted according to actual requirements, for example, in the case that the first extending portion 411 is long, the number of the limiting rods 415 can be adjusted to five or eight.

Further, in the present embodiment, the first detecting portion 412 and the second detecting portion 432 are both arc-shaped plates, and the first detecting portion 412 and the second detecting portion 432 surround the flow passage. That is, the flow direction of wind in the flow passage is perpendicular to the flow direction of wind between the first ventilation hole 413 and the second ventilation hole 433, so that the flow of air near the thermistor 1 is further increased, and the detection effect of the sensor is enhanced. In addition, the first detection part 412 and the second detection part 432 also form a protection structure for the thermistor 1, so that the thermistor 1 does not touch the inner wall of the inverted air duct, thereby being damaged and deformed.

Furthermore, in the present embodiment, the first extending portion 411 is provided with a plurality of connecting ports 416, the second extending portion 431 is provided with a plurality of connecting buckles 434, and the plurality of connecting buckles 434 and the plurality of connecting ports 416 are matched in a one-to-one correspondence manner, so as to fasten the first housing 41 and the second housing 43 together. It should be noted that, similar to the number of the limiting rods 415, the number of the connecting ports 416 or the connecting buckles 434 may also be adjusted according to actual needs, such as the length of the housing. The snap connection has the characteristic of convenient disassembly and assembly, so that the shell 4 of the embodiment can be assembled without tools, and the connecting snap 434 and the connecting port 416 can be integrally formed with the shell 4, thereby greatly improving the production rate of the embodiment.

Furthermore, the housing 4 of the present invention further includes a protective shell 44, the protective shell 44 is fixedly connected to the first housing 41, the protective shell 44 surrounds the portion of the insert 3 outside the accommodating cavity, and the axis of the protective shell 44 and the extending direction of the insert 3 are the same. The protective shell 44 is in a square tube shape, a plurality of sliding grooves are formed in the protective shell 44, and the female socket is formed in the protective shell 44, so that if the detection interface on the automobile control unit is separable, the detection interface can be inserted into the protective shell 44, and the design of the whole automobile is more flexible. In addition, the protective shell 44 is used to protect the portion of the insert 3 extending out of the shell, and can also play a fool-proof role when the sensor is mounted on the whole vehicle.

Furthermore, in this embodiment, a first inserting buckle is further formed on the outer side of the first extending portion 411, a second inserting buckle is further formed on the second extending portion 431, both the first inserting buckle and the second inserting buckle extend towards the bending portion 42, and when the first casing 41 and the second casing 43 are buckled, the first inserting buckle and the second inserting buckle are just combined to form a larger inserting opening. Therefore, the installation of the sensor can be realized only by arranging corresponding inserting buckling openings at the air duct or other positions where the temperature needs to be detected, parts such as bolts are not needed, and the difficulty in installation of the sensor is greatly reduced.

The utility model provides a pair of foldable wind channel temperature sensor need not to relapse inside thermistor 1 and the wire 2 of facial make-up during because of the casing shaping, has not only got rid of and has added the risk that man-hour thermistor 1 or wire 2 received the damage, still makes the casing can carry out production in batches alone. In addition, the assembly can be completed only by inserting the inserting piece 3 into the shell and buckling the shell during subsequent assembly, so that the production time of the product is greatly shortened, the consistency of the product is ensured, and the competitiveness of the product is improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. A folding duct temperature sensor, comprising:

a thermistor;

one end of the lead is fixedly connected with the thermistor;

the shell comprises a first shell, a bending part and a second shell which are sequentially connected, the first shell and the second shell are buckled to form an accommodating cavity, and the lead is arranged in the accommodating cavity; a first ventilation hole is formed in the first shell, and the projection of the thermistor on the first shell is located in the range of the first ventilation hole; the second shell is provided with a second vent hole, and the projection of the thermistor on the second shell is positioned in the range of the second vent hole.

2. The folded duct temperature sensor of claim 1, wherein the first housing includes a first extension and a first probe, and the second housing includes a second extension and a second probe; a partition plate is arranged between the first extending part and the first detecting part, the first extending part, the second extending part and the partition plate surround to form a closed space, and one end of the lead penetrates through the partition plate; the first vent hole is located in the first detection part, and the second vent hole is located in the second detection part.

3. The foldable air duct temperature sensor according to claim 2, wherein the first extension portion has a plurality of connection ports, the second extension portion has a plurality of connection buckles, and the plurality of connection buckles and the plurality of connection ports are in one-to-one matching connection.

4. The foldable duct temperature sensor of claim 2, wherein the first and second detectors are both curved plates, and the first and second detectors enclose an overflow channel.

5. The folding duct temperature sensor of claim 2, wherein a plurality of limiting rods are fixedly connected within the first extension portion, the limiting rods abutting the wires.

6. The folding air duct temperature sensor according to any one of claims 1 to 5, further comprising an insert, wherein the insert is fixedly connected to the other end of the lead, and the insert passes through the first housing and extends to the outside of the accommodating cavity.

7. The foldable air duct temperature sensor according to claim 6, wherein the other end of the wire is wound around the insert, and the part of the wire wound around the insert is fixedly connected with the insert by welding.

8. The foldable wind channel temperature sensor of claim 6, characterized in that, the housing further comprises a protective shell, the protective shell is square tube-shaped, the protective shell is fixedly connected with the first housing, the protective shell surrounds the portion of the insert outside the accommodating cavity, and the axis of the protective shell and the extending direction of the insert are the same.

9. The folding duct temperature sensor according to any one of claims 1 to 5, wherein the housing is a one-piece injection molded part.