WO2017203984A1

WO2017203984A1 - Temperature sensor

Info

Publication number: WO2017203984A1
Application number: PCT/JP2017/017784
Authority: WO
Inventors: 泰次柳田; 慎一高瀬; 康彦小寺
Original assignee: 株式会社オートネットワーク技術研究所; 住友電装株式会社; 住友電気工業株式会社
Priority date: 2016-05-24
Filing date: 2017-05-11
Publication date: 2017-11-30
Also published as: JP2017211240A

Abstract

A temperature sensor 20 has: an insertion section 39 which can be inserted into a duct 10 from a through-hole 12 formed in the duct 10, the duct 10 allowing air to flow through the inside thereof; a mounting member 21 mounted to the duct 10; and a temperature measurement section 40A held by the mounting member 21 and measuring the temperature of the inside of the duct 10. The insertion section 39 has formed therein an air flow passage 27 for conducting to the temperature measurement section 40A, the air flowing through the inside of the duct 10.

Description

Temperature sensor

In this specification, a technique related to a temperature sensor is disclosed.

Conventionally, a temperature sensor that detects the temperature in the duct is known. The temperature sensor disclosed in Patent Document 1 includes an attachment clamp that is inserted into and fixed to a through-hole of an attachment object, and a thermistor element that is embedded in the vicinity of the tip inside the attachment clamp. The thermistor element is embedded in the mounting clamp by insert molding.

JP 2010-281787 A

By the way, in the configuration in which the thermistor element is embedded in the mounting clamp by insert molding, the heat of the air in the air duct is indirectly transmitted to the thermistor element via the mounting clamp (part around the thermistor element). Compared with the case where the heat of air is directly transmitted to the thermistor element, there is a problem that the temperature cannot be measured with high accuracy.
The technique described in this specification has been completed based on the above-described circumstances, and aims to increase the accuracy of temperature measurement.

The temperature sensor described in the present specification has an insertion portion that can be inserted into the attachment object from a through hole formed in the attachment object through which gas flows, and is attached to the attachment object. A temperature sensor comprising a member and a temperature measuring unit that is held by the attachment member and measures the temperature in the attachment object, wherein the insertion part circulates in the attachment object An air passage that guides gas to the temperature measuring unit is formed.
According to this configuration, since the gas flowing through the attachment object can be directly brought into contact with the temperature measurement unit from the air passage, the temperature is indirectly transmitted to the temperature measurement unit via another member. Compared with, the accuracy of temperature measurement can be increased.

The following embodiments are preferable as the embodiments of the technology described in this specification.
The air passage is formed through the insertion portion along the gas flow direction in the attachment object.
If it does in this way, it will become possible to contact gas to a temperature measuring part efficiently.

The attachment member includes a storage chamber that can store the temperature measuring unit connected to an electric wire, and includes a tape that is wound so as to cover a lead-out port through which the electric wire in the storage chamber is led out. .
If the temperature measuring unit is housed in the housing chamber from the outlet, the temperature sensor can be easily assembled, but it is not easy to seal the temperature sensor because of the outlet. According to this configuration, the temperature sensor can be sealed by closing the outlet through tape winding.

The storage chamber includes a positional deviation regulating unit that regulates a positional deviation of the temperature measuring unit on the ventilation path, and a detachment regulating unit that regulates movement of the temperature measuring unit in the detaching direction from the storage chamber.
In this way, since the temperature measuring unit can be positioned on the air passage, the accuracy of temperature measurement can be further improved.

The hole diameter passing through the central axis of the through hole has a short diameter and a long diameter longer than the short diameter in a direction different from the short diameter, and the mounting member is a rib that contacts the hole wall of the through hole Have
This makes it possible to prevent the temperature sensor from rotating in the circumferential direction.

The rib extends to guide the gas to the ventilation path.
If it does in this way, gas can be led to an air passage using a rib.

According to the technique described in this specification, the accuracy of temperature measurement can be improved.

The perspective view which shows the state in which the temperature sensor of Embodiment 1 was attached to the duct. Right side view showing the temperature sensor attached to the duct AA sectional view of FIG. Sectional view in a direction perpendicular to FIG. Perspective view showing temperature sensor The perspective view which shows a temperature sensor from the direction different from FIG. Right side view showing temperature sensor BB sectional view of FIG. Front view showing temperature sensor CC sectional view of FIG. Bottom view showing temperature sensor The perspective view which shows the attachment process to the attachment member of a detection member A perspective view showing a process of winding a tape around a temperature sensor

<Embodiment 1>
The first embodiment will be described with reference to FIGS.
The temperature sensor 20 (FIG. 1) according to the present embodiment is mounted on a battery module (not shown) that is mounted on a vehicle (not shown) such as an electric vehicle or a hybrid vehicle and used as a power source for the vehicle. It attaches to the duct 10 (an example of an “attachment object”). In the following description, for the sake of explanation, the X direction is assumed to be forward, the Y direction is assumed to be left, and the Z direction is assumed to be upward.

(Duct 10)
The duct 10 has a shape in which air (gas) such as a rectangular tube shape or a cylindrical shape can be circulated therein, and as shown in FIGS. 3 and 4, the duct 10 is disposed inside (lower side in FIGS. 3 and 4). Air is circulated in the flow path (space).
Since the performance of the battery module is affected by temperature, it is preferable to maintain the temperature of the battery module at a predetermined temperature. Therefore, if the air duct 10 is provided in the battery module, the battery module is cooled by cold air when the temperature of the battery module is relatively high, and conversely, the temperature of the battery module becomes relatively low. If it is, it can be heated by warm air. In order to control the temperature of the battery module by blowing air, it is necessary to detect the temperature of the air flowing through the duct 10, and thus the temperature sensor 20 is attached to the duct 10.

Specifically, the duct 10 has an attached portion 11 to which the temperature sensor 20 is attached, and the attached portion 11 has a through hole 12 through which the insertion portion 39 of the temperature sensor 20 is introduced into the duct 10. Has been. Since the shape of the through hole 12 is an oval shape that is long in the left-right direction, the hole diameter passing through the central axis of the through hole 12 is longer than the short diameter A1 and the short diameter A1 in the direction orthogonal to the short diameter A1. A major axis A2.

(Temperature sensor 20)
As shown in FIG. 12, the temperature sensor 20 is connected to the attachment member 21 attached to the attached portion 11 and the terminal portion of the electric wire 46, and is held by the attachment member 21 and is a detection signal corresponding to the temperature in the duct 10. The detection member 40 which outputs to the outside from the electric wire 46 is provided.

(Mounting member 21)
The attachment member 21 is made of synthetic resin, and as shown in FIGS. 3 and 4, a rectangular tube-shaped tube portion 22 into which the detection member 40 connected to the electric wire 46 is inserted, and the outside of the tube portion 22. And a pair of elastic locking pieces 36 that elastically contact the edge of the through hole 12. The inside of the cylindrical portion 22 is a storage chamber 23 in which the detection member 40 is stored. The storage chamber 23 has a rectangular or circular cross-sectional shape that is substantially constant over the entire length in the vertical direction. The lower end portion (tip portion) of the cylindrical portion 22 is closed to be a closed wall 24 with which the lower end portion of the detection member 40 comes into contact, and the outlet port 25 through which the electric wire 46 is led out is formed at the upper end portion of the cylindrical portion 22. ing.

At the lower end (tip) of the storage chamber 23 (cylinder part 22), an air passage 27 is formed across the cylinder part 22. The air passage 27 is formed so as to penetrate the cylindrical portion 22 in the front-rear direction (air flow direction). The ventilation path 27 is in communication with the space inside the accommodation chamber 23. The front and rear end portions of the air passage 27 are a pair of openings 28 that penetrate the wall of the cylindrical portion 22. The pair of openings 28 are coaxial with each other and have the same rectangular shape. A pair of misregistration regulating portions 29 rises on the air passage 27 in the closing wall 24. The misalignment restricting portion 29 is formed by increasing the thickness of the wall of the cylindrical portion 22, and has an inner wall surface 29 </ b> A that continues to the side surface of the opening portion 28. Between the pair of misregistration restricting portions 29, the temperature measuring portion 40A of the detection member 40 is inserted with a slight gap. At the normal position of the temperature measuring unit 40A, the temperature measuring unit 40A is exposed from each of the pair of front and rear openings 28 (see FIG. 9).

As shown in FIG. 4, a pair of detachment regulating portions 30 that regulate the detachment of the detection member 40 are provided at the upper end portion (end portion on the electric wire 46 side) of the cylindrical portion 22. The detachment restricting portion 30 is formed so as to be able to bend and deform by cutting out the upper portion of the cylindrical portion 22 with a plurality of slits, and is engaged with the upper end portion of the detection member 40 (the exterior portion 44 thereof) at the distal end portion. A locking projection 30A that restricts the separation of the detection member 40 protrudes inward. The misregistration restricting portion 29 and the detachment restricting portion 30 are positioning portions that are positioned by the temperature measuring portion 40A.

As shown in FIG. 6, a pair of ribs 31 extending in the vertical direction are formed at positions adjacent to the left and right of the pair of openings 28 on the outer surface of the cylindrical portion 22. Each rib 31 extends from below the flange portion 34 on the outer surface of the cylindrical portion 22 to the distal end portion of the cylindrical portion 22, and the distal end portion is inclined and protruded to a through hole 12 of the insertion portion 39. It is used as a guide for the insertion. In a state where the attachment member 21 is attached to the duct 10, the rib 31 is in close contact with the hole wall of the through hole 12 (FIG. 4).

The flange portion 34 has an oval shape corresponding to the shape of the through hole 12, and is inclined so that the outer side approaches the outer surface of the duct 10. As shown in FIG. 3, the elastic locking piece 36 extends upward with the lower end portion (tip portion) of the cylindrical portion 22 as a base end portion, and can be bent and deformed. A locking recess 37 is formed at the tip of the elastic locking piece 36. The locking recess 37 is formed by cutting out the tip end portion of the elastic locking piece 36 so as to fit into the right-angled hole edge of the through hole 12. The lower portion of the flange portion 34 in the cylindrical portion 22 and the elastic locking piece 36 serve as an insertion portion 39 that is inserted into the duct 10 from the through hole 12.

(Detection member 40)
The detection member 40 includes a temperature detection element 41 and a synthetic resin exterior portion 44 that covers the temperature detection element 41, and a temperature measurement unit that directly receives the heat of air at the lower end (front end) of the detection member 40. 40A. The temperature detection element 41 includes an element body 42 and a pair of lead portions 43 connected to the element body 42. As the temperature detection element 41, for example, a PTC thermistor or an NTC thermistor can be appropriately selected. Further, the element is not limited to the thermistor, and any element can be appropriately selected as long as the temperature can be detected. The exterior portion 44 is in close contact with the temperature detection element 41 and can be integrally formed with the temperature detection element 41 in a state of being connected to the electric wire 46 by, for example, insert molding.

A pair of electric wires 46 are connected to the pair of lead portions 43, and the pair of electric wires 46 are led out of the cylindrical portion 22. The electric wire 46 is a covered electric wire in which the periphery of the conductor portion 47 is covered with an insulating coating 48, and the lead portion 43 is connected to the conductor portion 47 exposed by removing the insulating coating 48 at the terminal portion. The electric wire 46 is connected to an external circuit such as an ECU (Electronic Control Unit) not shown, and a signal from the temperature detection element 41 is transmitted to the external circuit via the electric wire 46.

The tape 50 has an adhesive layer made of an adhesive layered on a synthetic resin or metal sheet, for example, and the adhesive layer is fixed to the upper portion of the cylindrical portion 22 and the pair of electric wires 46. The tape 50 is wound a plurality of times so as to close the gap of the outlet 25 from which the electric wire 46 is led out.

The assembly of the temperature sensor 20 will be described.
As shown in FIG. 12, when the detection member 40 connected to the terminal portion of the electric wire 46 is inserted into the cylindrical portion 22, the rear end portion of the detection member 40 comes into contact with the locking protrusion 30 </ b> A of the separation restricting portion 30 and bends. When the tip end portion of the detection member 40 is deformed and inserted between the pair of misregistration restricting portions 29 and comes into contact with the closing wall 24, the disengagement restricting portion 30 is restored and deformed so that the locking projection 30A is the upper end of the detection member 40. Lock to the part. And as shown in FIG. 13, the tape 50 is wound around a pair of electric wires 46 led out from the cylindrical portion 22 and the cylindrical portion 22 on the upper side of the flange portion 34, and a gap between the cylindrical portion 22 and the electric wires 46 is formed. When closed, the temperature sensor 20 is assembled (FIGS. 8 and 10).

Next, attachment of the temperature sensor 20 to the attached portion 11 will be described.
When the insertion portion 39 of the temperature sensor 20 is inserted into the oval through hole 12 of the duct 10, the elastic locking piece 36 comes into contact with the hole wall of the through hole 12 and is elastically deformed. When the insertion portion 39 is inserted until the locking recess 37 reaches the hole wall of the through hole 12, the elastic locking piece 36 is restored and deformed, and the locking recess 37 is locked to the edge of the through hole 12. Thereby, the temperature sensor 20 is attached to the to-be-attached part 11 (FIG. 3, FIG. 4). At this time, since the air passage 27 extends in the flow direction of the air in the duct 10, the air flows directly in the flow direction (the direction indicated by the one-dot chain line in FIG. 4) after directly contacting the detection member 40. .

According to the said embodiment, there exist the following effects.
The temperature sensor 20 has an insertion portion 39 that can be inserted into the duct 10 through a through hole 12 formed in the duct 10 (attachment target) through which air (gas) flows, and is attached to the duct 10. 21 and a temperature sensor 40A that is held by the attachment member 21 and measures the temperature in the duct 10. The temperature sensor 20 includes a temperature sensor 20A that measures the temperature of the air in the duct 10. An air passage 27 leading to the warm part 40A is formed.

According to the present embodiment, since the gas flowing through the duct 10 can be brought into direct contact with the temperature measuring unit 40A from the air passage 27, the temperature is indirectly transmitted to the temperature measuring unit 40A via another member. The accuracy of temperature measurement can be increased as compared with the configuration to be performed.

The air passage 27 is formed through the insertion portion 39 along the gas flow direction in the duct 10.
If it does in this way, it will become possible to make air contact the temperature measuring part 40A efficiently in this way.

The mounting member 21 includes a storage chamber 23 that can accommodate the temperature measuring unit 40A connected to the electric wire 46, and covers the outlet 25 through which the electric wire 46 in the storage chamber 23 is led out. A tape 50 to be wound is provided.
When the temperature measuring unit 40A is configured to be accommodated in the accommodation chamber 23 from the outlet 25, the temperature sensor 20 can be easily assembled, but the temperature sensor 20 can be easily sealed because of the outlet 25. is not. According to this embodiment, since the outlet 25 can be closed by tape winding, the temperature sensor 20 can be sealed.

In addition, the storage chamber 23 includes a positional deviation restricting portion 29 that holds the temperature measuring portion 40A on the air passage 27, and a detachment restricting portion 30 that restricts the movement of the temperature measuring portion 40A in the detaching direction from the accommodating chamber 23. Prepare.
In this way, since the temperature measuring unit 40A can be positioned on the air passage 27, the accuracy of temperature measurement can be further improved.

Further, the hole diameter passing through the central axis of the through hole 12 has a short diameter A1 and a long diameter A2 longer than the short diameter A1 in a direction different from the short diameter A1, and the mounting member 21 is a hole wall of the through hole 12 The rib 31 is in contact with.
In this way, it is possible to prevent the temperature sensor 20 from rotating in the circumferential direction.

The rib 31 extends so as to guide air to the ventilation path 27.
In this way, the gas can be guided to the ventilation path 27 using the rib 31.

<Other embodiments>
The technology described in the present specification is not limited to the embodiments described with reference to the above description and the drawings. For example, the following embodiments are also included in the technical scope of the technology described in the present specification.
(1) The shape of the air passage 27 is not limited to the shape of the above embodiment, and can be changed to various shapes as long as the gas can be brought into contact with the temperature measuring unit 40A.
(2) In the above-described embodiment, the shape of the through hole 12 is an oval shape. However, the shape is not limited to this, and other shapes such as a perfect circle shape and an oval shape may be used.

10: Duct (object to be mounted)
12: Through-hole 20: Temperature sensor 21: Mounting member 22: Tube portion 23: Storage chamber 25: Lead-out port 27: Air passage 28: Opening portion 29: Position shift restricting portion 30: Departure restricting portion 31: Rib 39: Inserting portion 40: Detection member 40A: Temperature measuring unit 41: Temperature detection element 46: Electric wire 50: Tape

Claims

It has an insertion part that can be inserted into the attachment object from a through hole formed in the attachment object through which gas flows, and is attached to the attachment object, and is held by the attachment member, A temperature sensor for measuring the temperature in the mounting object, and a temperature sensor comprising:
The temperature sensor, wherein an air passage that guides the gas flowing through the attachment object to the temperature measuring part is formed in the insertion part.
The temperature sensor according to claim 1, wherein the ventilation path is formed through the insertion portion along a direction in which the gas flows in the attachment target.
The mounting member includes a storage chamber capable of storing the temperature measuring unit connected to an electric wire,
The temperature sensor of Claim 1 or Claim 2 provided with the tape wound so that the said electric wire in the said storage chamber may cover the outlet port led out outside.
The storage chamber includes a misregistration regulating unit that regulates the misalignment of the temperature measuring unit on the ventilation path, and a detachment regulating unit that regulates movement of the temperature measuring unit in the detaching direction from the accommodating chamber. Item 4. The temperature sensor according to Item 3.
The hole diameter passing through the central axis of the through hole has a short diameter and a long diameter longer than the short diameter in a direction different from the short diameter,
The temperature sensor according to any one of claims 1 to 3, wherein the mounting member includes a rib that abuts against a hole wall of the through hole.
The temperature sensor according to claim 5, wherein the rib extends so as to guide the gas to the ventilation path.