JP5769298B2 - Temperature sensor, integrated sensor for detecting temperature and pressure - Google Patents

Description

  The present invention relates to an integrated sensor that includes a temperature sensor that detects the temperature of a fluid that flows around it, and a pressure sensor that detects the pressure of the fluid in addition to temperature detection.

For example, Patent Document 1 discloses a sensor sensor in which a temperature sensor that detects the temperature of a fluid and a pressure sensor that detects the pressure of the fluid are integrated (hereinafter, simply referred to as an integrated sensor). Yes.
As shown in FIG. 11 , in the integrated sensor 100 of Patent Document 1, a temperature detection element 102 and a pressure detection element 103 are coupled to one side and the other side of a metallic housing 104, respectively. The housing 104 is arranged to transmit the temperature of the fluid to the temperature detection element 102 and to transmit the pressure of the fluid to the pressure detection element 103. The housing 104 includes an extended body 105 and a pressure detection structure 107 connected to the open end portion 106 of the body 105. The temperature sensing element 102 is disposed at the closed end 108 of the body 105, and the pressure sensing element 103 is mounted on the pressure sensing structure 107.
In the integrated sensor 100 of Patent Document 1, a body 105 is disposed in a fluid to be detected, and the temperature detection element 102 detects the temperature of the fluid. The integrated sensor 100 indirectly transmits the pressure of the fluid received by the body 105 to the pressure detection element 103 via the housing 104 (body 105, pressure detection structure 107).

JP 2007-147616 A

According to the integrated sensor 100 of Patent Document 1 in which a combination of a temperature sensor and a pressure sensor is possible, in addition to being able to reduce the size, by using a single metal housing that transmits both temperature and pressure. The possibility that the fluid to be detected leaks into the integrated sensor is reduced. However, in the integrated sensor 100 of Patent Document 1, the housing 104 (body 105) that houses the temperature detection element 102 is made of metal, typically stainless steel. Therefore, since the material cost and the processing cost are high, the obtained integrated sensor 100 is expensive.
Further, in the integrated sensor 100 of Patent Document 1, when a long body 105 receives the pressure of fluid flowing in a direction orthogonal to the axial direction, a moment is generated there, and the pressure detection element 103 accurately controls the fluid pressure. May not be detected.
The present invention has been made based on such a technical problem, and provides a temperature sensor that can prevent the leakage of a fluid to be detected while forming a housing with a resin less expensive than metal. With the goal.
Moreover, an object of this invention is to detect the pressure of the fluid which is a detection target accurately in an integrated sensor provided with such a temperature sensor.

Producing a temperature sensor housing by injection molding a resin is extremely advantageous in terms of cost compared to producing a housing of metal. However, when manufacturing a temperature sensor that houses a temperature detection element in a housing, a high pressure of the resin injected into the mold is an obstacle. That is, even if the temperature detection element is arranged at a predetermined position in the mold, it is assumed that the temperature detection element is displaced from a desired position under the pressure of the resin. When this positional deviation becomes large, the temperature detection element is exposed on the surface of the housing, and there is a possibility that a seam is formed between the housing and the temperature detection element on the surface of the housing. If it does so, there exists a possibility that a fluid may leak from this seam. If the fluid leaks into the sensor, it may cause a failure of the temperature sensor or the pressure sensor itself. Moreover, if the fluid leaks through the sensor to the device to which the sensor is attached, it may cause a failure of the electronic component on the device side. Thus, the sensor needs to prevent fluid from leaking into it. In particular, when the fluid to be detected is oil, preventing leakage is a major proposition. Therefore, in the present invention, attention has been paid to the fact that the housing has a two-layer structure of an inner housing and an outer housing. That is, the temperature sensor of the present invention includes a temperature detection element and a resin housing that houses the temperature detection element. This housing includes an inner housing and an outer housing. The inner housing holds the temperature detection element. An outer housing covers the circumference | surroundings of an inner housing including the temperature detection element hold | maintained. In the temperature sensor of the present invention, a part of the temperature detecting element is in contact with the outer housing without being covered with the inner housing.

  According to the temperature sensor of the present invention, the housing includes the inner housing and the outer housing, and the inner housing supports the temperature detection element. Therefore, even if the inner housing that supports the temperature detection element is disposed in the mold and resin is injected into the mold in order to form the outer housing, the temperature detection element does not shift. At this time, since the temperature sensor of the present invention can be covered with the outer housing formed integrally with the inner housing, the fluid touching the temperature sensor can be prevented from leaking.

As a typical form of the temperature sensor of the present invention, the housing holds a first element holding tower having an element holding part at the tip, a terminal connected to the lead wire of the temperature detecting element, and a first element. And a base portion supporting the holding tower. Since this temperature sensor has a form in which the first element holding tower portion protrudes from the base portion, it is advantageous for detecting the temperature of the fluid flowing in a position away from the base portion.
In this temperature sensor, it is preferable to provide a fluid passage through which the fluid to be detected passes through the front and back of the base portion of the housing. When an integrated sensor is configured together with the pressure sensor, the fluid can be brought into direct contact with the pressure sensor by allowing the fluid to reach the pressure sensor through the fluid passage. By doing so, the pressure sensor can detect the pressure of the fluid with high accuracy.

  Moreover, when an inner housing is provided with the 2nd element holding tower corresponding to a 1st element holding tower, it is preferable that the lead wire accommodation recessed part in which a lead wire is accommodated is provided in the outer periphery along the axial direction. When the inner housing is insert-molded by the outer housing, if the lead wire is accommodated in the lead wire accommodating recess, the lead is not displaced out of the lead wire accommodating recess.

The present invention can use any one of the temperature sensors listed above as a temperature sensor in an integrated sensor including a temperature detection sensor that detects the temperature of the fluid and a pressure sensor that detects the pressure of the fluid.
In this integrated sensor, a temperature sensor is provided in which a fluid passage through which the fluid to be detected flows passes through the front and back of the base of the housing, and the fluid to be detected that has passed through the fluid passage acts on the pressure sensing element. It is preferable to detect the pressure by doing so. This is because the pressure can be accurately detected without using another member.
Moreover, in this integrated sensor, it is preferable that the housing of the temperature sensor does not have a seam in a region in contact with a path through which a fluid to be detected flows.

  According to the present invention, the housing includes the inner housing and the outer housing, and the inner housing supports the temperature detection element. Therefore, when the inner housing that supports the temperature detection element is insert-molded in the outer housing, the temperature detection element does not shift. Moreover, since the periphery of the inner housing can be covered with the outer housing, the fluid touching the temperature sensor can be prevented from leaking.

It is the perspective view of the temperature sensor in this Embodiment, (a) is the figure seen from the surface side, (b) is the figure seen from the back surface side. It is the perspective view which looked at the inner housing in this Embodiment from the surface side. It is the perspective view which looked at the inner housing in this Embodiment from the back surface side. It is the perspective sectional view which looked at the inner housing provided with the temperature sensing element in this embodiment from the surface side. It is the perspective sectional view which looked at the inner housing provided with the temperature sensing element in this embodiment from the back side. It is the perspective sectional view which looked at the temperature sensor in this embodiment from the surface side. It is the perspective sectional view which looked at the temperature sensor in this embodiment from the back side. It is another perspective sectional view which looked at the temperature sensor in this embodiment from the back side. It is a longitudinal cross-sectional view of the temperature sensor in this Embodiment. It is a longitudinal cross-sectional view of the other temperature sensor in this Embodiment. It is sectional drawing which shows the conventional integrated sensor.

Hereinafter, the temperature sensor of the present invention will be described in detail based on the embodiments shown in FIGS.
The temperature sensor 1 in the present embodiment includes a temperature detection element 10 and a housing 20 that houses the temperature detection element 10 therein. The temperature sensor 1 can detect the temperature of the fluid (gas, liquid) as a single unit. Moreover, the temperature sensor 1 can simultaneously detect the temperature and pressure of the fluid as an integrated sensor 3 integrated with the pressure sensor 2 as described later.

[Temperature sensing element 10]
The temperature detection element 10 includes an element body 11 and a pair of lead wires 12 drawn from the element body 11.
The element body 11 is made of a material having temperature characteristics in electrical resistance, such as a thermistor.
The lead wires 12 drawn from the element body 11 are respectively connected to a pair of terminals 45 held by the housing 20. The terminal 45 is made of a metal material such as copper having good electrical conductivity.
The temperature detection element 10 causes a predetermined current to flow through the element main body 11 through one terminal 45 and the lead wire 12, and further, based on a change in resistance value of a current path that leads to the other lead wire 12 and the terminal 45. Detect the temperature of

[Housing 20]
The housing 20 of the temperature sensor 1 has a two-layer structure including an inner housing 30 and an outer housing 50. The temperature detection element 10 accommodated in the housing 20 is sealed from the outside by being covered with the inner housing 30 and the outer housing 50.

[Inner housing 30]
The inner housing 30 is integrally formed by injection molding of resin. The preformed inner housing 30 is insert-molded at the time of injection molding for forming the outer housing 50 while holding the temperature detecting element 10 and being arranged at a predetermined position of the mold. At this time, the inner housing 30 maintains the temperature detection element 10 at a predetermined position in the housing 20.

The inner housing 30 includes an element holding tower 31 and a base 41 that supports the element holding tower 31.
The element holding tower 31 extends in the axial direction from the rear end continuous to the center of the base 41 toward the tip where the element holding part 32 is provided. The element holding portion 32 is formed with an element receiving groove 33 that recedes from the front end toward the rear end. The temperature detection element 10 (element body 11) is held in the element holding portion 32 by being housed in the element housing groove 33 and supported by the support floor 34. The element housing groove 33 is set to have a diameter so that the element body 11 of the temperature detecting element 10 can be housed. Setting the diameter of the element receiving groove 33 so that the element main body 11 fits in the element holding portion 32 is preferable from the viewpoint of preventing misalignment of the temperature detecting element 10 during injection molding. The depth of the element receiving groove 33 is set so that a part (tip) of the element main body 11 protrudes from the element holding portion 32. If it does so, even if the element main body 11 is covered with the outer housing 50, since the distance from the element main body 11 to the fluid which is a detection target can be shortened, it contributes to the improvement of temperature detection accuracy. However, the present invention is not limited to this, and the entire element body 11 is allowed to be accommodated in the element accommodating groove 33.
The element holding tower portion 31 includes a lead wire accommodating portion 35 from the element holding portion 32 to the base portion 41. The lead wire accommodating portion 35 is constituted by a concave groove formed in the outer peripheral surface of the element holding tower portion 31 along the axial direction. One lead wire accommodating portion 35 is formed at each target position on the outer peripheral surface of the element holding tower portion 31. When the temperature detection element 10 is held in the element holding portion 32, each of the pair of lead wires 12 connected to the temperature detection element 10 is accommodated and held in the lead wire accommodation portion 35. By doing so, when the outer housing 50 covering the periphery of the inner housing 30 is injection-molded, the position of the lead wire 12 is prevented from shifting. The rear end side of the lead wire 12 passing through the lead wire accommodating portion 35 is drawn out to the back surface of the base portion 41.

The base 41 has a substantially disk shape and supports the element holding tower 31 at its rear end. In addition, in the base part 41, the side which supports the element holding tower part 31 is defined as the front surface, and the surface facing the surface is defined as the back surface. This front / back definition is the same for the outer housing 50.
The base 41 includes a lead wire insertion hole 42 connected to the lead wire accommodating portion 35 of the element holding tower 31 (FIGS. 3 to 5). The lead wire insertion hole 42 penetrates the back surface from the surface of the base portion 41, and the lead wire 12 passes through the lead wire insertion hole 42 and the rear end side is drawn out to the back surface side of the base portion 41.
The base 41 includes a pair of lead wire guides 43 on the back surface (FIGS. 3 to 5). The lead wire guide 43 is configured by a groove having a predetermined width that recedes from the back surface toward the front surface. Each lead wire guide 43 has one end connected to the lead wire insertion hole 42 and the other end opened to the outer peripheral surface 44 of the base 41. The lead wire guide 43 is bent halfway so as to avoid interference with a terminal 45 described later. The lead wires 12 drawn to the back surface of the base portion 41 are each placed in a lead wire guide 43.

  The base 41 includes a pair of terminals 45. The terminal 45 formed in an L shape includes a holding portion 45a held inside the base portion 41 and a connection portion 45b. When the inner housing 30 is injection-molded, the terminal 45 is disposed at a predetermined position in the mold so that the holding portion 45a of the terminal 45 is insert-molded so as to be held in the base portion 41. On the other hand, the connecting portion 45b protrudes from the back surface and is electrically connected to a counterpart terminal (not shown). The base portion 41 is formed with a pair of exposure holes 46 for exposing a part of the holding portion 45a to the back surface side. An exposure hole 46 penetrating the front and back of the base portion 41 is formed in the middle of the lead wire guide 43. Therefore, the lead wire 12 passing through the lead wire guide 43 is secured in the exposed hole 46 by electrical connection by the holding portion 45a and other means. The exposed hole 46 is filled with a part of the outer housing 50 when the inner housing 30 is insert-molded into the outer housing 50.

  The base 41 is formed with a resin passage 47 penetrating the front and back. The resin passage 47 makes it easy for molten resin to flow from the front surface side of the base portion 41 to the back surface side (or vice versa) when the inner housing 30 is insert-molded into the outer housing 50. In order to sufficiently obtain this effect, the resin passage 47 is formed at three locations so as to surround the element holding tower 31. The resin passage 47 is also filled with a part of the outer housing 50 when the inner housing 30 is insert-molded into the outer housing 50.

[Outer housing 50]
The outer housing 50 includes a tower portion 51 and a base portion 55. A tower 51 provided corresponding to the element holding tower 31 of the inner housing 30 covers the periphery of the element holding tower 31. A base 55 provided corresponding to the base 41 of the inner housing 30 covers the periphery of the base 41. Since the outer housing 50 is located on the outer periphery of the housing 20, the housing 20 also includes a tower portion (51) and a base portion (55). Thus, the outer housing 50 is provided with an airtightness that prevents the fluid from leaking into the inside by accommodating the inner housing 30 without having a seam.

The base 55 includes a first recess 56 having a rectangular shape in plan view on the back surface. The 1st recessed part 56 accommodates the front end side of the pressure sensor 2 mentioned later. A second recess 57 having a circular shape in plan view is formed in the first recess 56. The fluid to be detected flows into the second recess 57 through the fluid passage 58 described later. When the temperature sensor 1 and the pressure sensor 2 are assembled, the second recess 57 forms a fluid reservoir with the pressure detection element 15, and when the fluid in the fluid reservoir acts on the pressure detection element 15, the pressure detection element 15. Detects the pressure of the fluid.
A fluid passage 58 (see FIG. 8) is formed in the base 55. The fluid passage 58 penetrating the front and back of the base portion 55 opens to the second recess 57 on the back surface side. The fluid passage 58 also penetrates the inner housing 30 via the resin passage 47 (any one). The fluid to be detected is guided to the pressure detection element 15 through the fluid passage 58.

  A connecting portion 45 b of the terminal 45 protrudes from the back surface of the base portion 55. The pair of connection portions 45 b are arranged outside the first recess 56 and at a target position with the tower portion 51 as the center. Thus, the terminal 45 is held by the outer housing 50 together with the inner housing 30.

The temperature sensor 1 having the above configuration is manufactured as follows.
First, the inner housing 30 is produced by injection molding. At this time, the terminal 45 is disposed at a predetermined position of the injection mold, and the terminal 45 is insert-molded to obtain the inner housing 30 in which the terminal 45 is integrally molded.
Next, the temperature detection element 10 is assembled to the inner housing 30. That is, the element body 11 is accommodated in the element accommodating groove 33 and the lead wire 12 is accommodated in the lead wire accommodating portion 35. The rear end side of the lead wire 12 is drawn out to the back surface of the base portion 41 through the lead wire insertion hole 42, and the drawn portion is disposed in the lead wire guide 43. The lead wire 12 is joined to the holding portion 45a of the terminal 45 in the exposure hole 46 by, for example, welding.
Next, the inner housing 30 to which the temperature detection element 10 is assembled is placed in a predetermined mold, and the outer housing 50 is formed by injection molding. At this time, the molten resin injected into the mold efficiently flows from the front surface side of the base 41 to the back surface side (or vice versa) through the resin passage 47.

In the temperature sensor 1 manufactured as described above, the outer housing 50 that is integrally formed without a joint is provided on the outer periphery of the housing 20, so that the fluid to be detected leaks into the inside. There is nothing.
The temperature sensor 1 insert-molds the inner housing 30 holding the temperature detection element 10 with the outer housing 50, so that there is no possibility that the temperature detection element 10 is displaced during injection molding. Therefore, since the temperature detection element 10 can be accommodated at a desired position in the housing 20, the temperature sensor 1 can realize accurate temperature detection. In addition, although it can be said that there is a seam between the periphery of the terminal 45 to be pulled out and the outer housing 50 on the back surface of the outer housing 50, as is apparent from the integrated sensor 3 described later, this portion is used as a fluid. It is easy to set an area that is not touched. Therefore, the terminal 45 being pulled out from the back surface of the outer housing 50 does not hinder the prevention of fluid leakage into the temperature sensor 1.

  Here, when the temperature sensor 1 is manufactured, it can be assumed that the housing 20 has a single-layer structure and a space for accommodating the temperature detection element 10 is provided inside the tower. In this case, it is necessary to seal the gap on the back side of the housing 20 in order to prevent the fluid from entering the gap, but a seam remains there. This seam will face the fluid reservoir described above. Accordingly, when a structure for guiding the fluid to the fluid reservoir via the fluid passage 58 is employed, the seam is exposed to the fluid while the integrated sensor 3 is used. Although it is possible to make the sealing of the seam sufficiently high, in order to eliminate the possibility of fluid leakage from the seam, there is no need to provide a seam around the area in contact with the fluid as in the temperature sensor 1 without leakage. It is preferable to form them integrally.

[Pressure sensor, integrated sensor]
The above temperature sensor 1 can be used as a single unit for detecting the temperature of a fluid, and can also be used for an integrated sensor 3 integrated with a pressure sensor 2. An example will be described with reference to FIG. Note that the pressure sensor 2 and the integrated sensor 3 described here are merely examples, and it goes without saying that the temperature sensor of the present invention can be combined with other types of pressure sensors and integrated sensors.

  The pressure sensor 2 disposed on the rear end side of the temperature sensor 1 includes a pressure detection element 15, a circuit unit 16 disposed on the back side of the pressure detection element 15, and a terminal 17 electrically connected to the circuit unit 16. And. The pressure detection element 15 can be composed of, for example, a piezoelectric element called a piezoelectric element. The circuit unit 16 amplifies and compensates for an electric signal generated when the pressure detection element 15 receives pressure, and supplies the signal to the terminal 17. The circuit unit 16 only needs to have at least this function, and a known configuration such as an electronic component, a circuit board on which wiring is mounted, and a flexible board can be employed. The terminal 17 is electrically connected to a counterpart terminal (not shown).

The pressure sensor 2 includes a housing 60. The housing 60 having a substantially cylindrical shape includes an accommodation space 61 on the side where the temperature sensor 1 is attached. The accommodation space 61 is open on the surface facing the temperature sensor 1. The circuit unit 16 is accommodated in the accommodation space 61.
The housing 60 includes a terminal holding portion 63 on the back side of the housing space 61, and the terminal 17 is held in the housing 60 by being press-fitted into the terminal holding portion 63. The terminal 17 is pulled out through the terminal holding portion 63 on the rear end side.
The housing 60 includes a connector portion 62 that receives the mating connector on the back surface side so as to surround the terminal 17.

When the pressure sensor 2 is assembled with the temperature sensor 1, the pressure detection element 15 of the pressure sensor 2 is accommodated in the second recess 57 (fluid reservoir) of the outer housing 50. However, a space in which the fluid to be detected flows is left in the second recess 57 and above the pressure detection element 15 in the drawing. In this space, a ring-shaped sealing body (O-ring) OR <b> 2 is provided between the pressure detection element 15 and the outer housing 50 in order to prevent fluid from flowing out from the space to the outside.
Further, the housing 60 and the outer housing 50 are assembled by appropriate means so that the upper surface 60U of the housing 60 and the lower surface 50L of the outer housing 50 are in close contact with each other without any gap.

The pressure sensor 2 described above is housed in the protective tube 70 together with the temperature sensor 1 to constitute the integrated sensor 3. The protective tube 70 includes a cylindrical tower portion 71 and a base portion 75 that supports the tower portion 71. The tower portion 71 is provided with a fluid passage 72 through which a fluid to be detected flows and is guided to the inside of the base portion 75. A screw for attaching the integrated sensor 3 to a device through which a fluid to be detected flows can be provided on the outer periphery of the tip of the tower portion 71.
When the integrated sensor 3 is attached to the device, the fluid passage 72 and the passage of the device through which the fluid to be detected flows are communicated. The base 75 includes an accommodation space 76 for accommodating the temperature sensor 1 and the pressure sensor 2 therein. The accommodation space 76 communicates with the fluid passage 72 of the tower portion 71. In the accommodation space 76, a ring-shaped sealing body (O-ring) OR <b> 1 is provided between the base 75 and the outer housing 50 in order to prevent fluid from flowing out from the accommodation space 76 to the outside.

  When the integrated sensor 3 is attached to the device, as shown by an arrow in FIG. 9, the fluid L to be detected flows into the fluid passage 72, and the temperature sensor 1 (the tower portion 51 of the outer housing 50) and the protective tube. Fill between 70. In this process, the temperature detection element 10 of the temperature sensor 1 detects the temperature of the fluid. The fluid that has flowed into the fluid passage 72 reaches the accommodation space 76 in the base portion 75, and a part of the fluid passes through the fluid passage 58 (see FIGS. 8 and 9) formed in the outer housing 50 and passes through the outer housing. The pressure detection element 15 is pushed into the 50 second recess 57 (fluid reservoir). Thereby, the pressure detection element 15 detects the pressure of the fluid.

The integrated sensor 3 includes the fluid passage 58 through which the temperature sensor 1 passes through the housing 20 (the base 41 of the inner housing 30 and the base 61 of the outer housing 50). Therefore, the integrated sensor 3 can directly apply the fluid passing through the fluid passage 58 to the pressure sensor 2 (the pressure detecting element 15), so that the pressure can be accurately measured rather than applying the pressure via another member. Can be detected. In addition, since it is not necessary to separately provide a fluid passage outside the housing 20, the integrated sensor 3 can be reduced in size.
Further, in the integrated sensor 3, the temperature sensor 1 (outer housing 50) is integrally formed so that there is no seam in the area (arrows in FIGS. 9 and 10) that the fluid touches. In addition, a sealing body OR1 is provided between the temperature sensor 1 (outer housing 50) and the protective tube 70, and between the temperature sensor 1 (outer housing 50) and the pressure sensor 2 (pressure detection element 15). Since the sealing body OR2 is provided, the fluid does not flow out from the flow path to the outside. In this way, the integrated sensor 3 can prevent the fluid to be detected from leaking into the interior (excluding the flow path). In addition, the position which provides sealing body OR1 and OR2 is arbitrary as long as the objective is achieved, For example, you may provide sealing body OR1 in the position shown in FIG.

In the above embodiment, the element body 11 of the temperature detection element 10 is a thermistor, but this is only an example, and other materials having temperature characteristics in electrical resistance can be used for the element body 11. In addition, an element such as providing a protective layer on the surface of the element body 11 can be added. The pressure detection element 15 is not limited to a piezoelectric element, and the present invention uses an electronic detection element such as a capacitive pressure detection element or a strain gauge detection element, or a mechanical detection element represented by a diaphragm type or a bellows type. You can also.
Moreover, in the said embodiment, although it has the form which the tower part 51 protrudes from the base 55 of the temperature sensor 1, this is a form to the last, and it cannot be overemphasized that this invention is applicable to the temperature sensor of another form. Yes. The same applies to the pressure sensor combined with the temperature sensor.
Other than this, as long as the gist of the present invention is not deviated, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

DESCRIPTION OF SYMBOLS 1 Temperature sensor 2 Pressure sensor 3 Integrated sensor 10 Temperature detection element 11 Element main body 12 Lead wire 15 Pressure detection element 16 Circuit part 17 Terminal 20 Housing 30 Inner housing 31 Element holding tower part 32 Element holding part 33 Element accommodation groove 34 Support floor 35 Lead wire accommodating portion 41 Base portion 42 Lead wire insertion hole 43 Lead wire guide 44 Outer peripheral surface 45 Terminal 45a Holding portion 45b Connection portion 46 Exposed hole 47 Resin passage 50 Outer housing 51 Tower portion 55 Base portion 56 First recess 57 Second recess 58 Fluid passage 60 Housing 61 Housing space 62 Connector portion 63 Terminal holding portion 70 Protective tube 71 Tower 72 Fluid passage 75 Base 76 Housing space OR1, OR2 Sealing body

Claims (8)

A temperature sensing element, and a resin housing that houses the temperature sensing element,
The housing is
An inner housing and an outer housing,
The inner housing holds the temperature detection element,
The outer housing, including the temperature sensing element is held, not covering the periphery of said inner housing,
A part of the temperature detection element is in contact with the outer housing without being covered with the inner housing,
A temperature sensor characterized by that. The housing is
A first element holding tower having an element holding part for holding the temperature detection element at a tip part;
While holding a terminal connected to a lead wire drawn out from the temperature detection element, and a base portion supporting the element holding tower,
A temperature sensor according to claim 1. The base is
A fluid passage through which a fluid to be detected flows is formed through the front and back surfaces.
The temperature sensor according to claim 2 . The inner housing is
A second element holding tower corresponding to the first element holding tower of the housing;
A lead wire housing recess for housing the lead wire is provided on the outer periphery along the axial direction of the second element holding tower,
The temperature sensor according to claim 2 or 3 . An integrated sensor comprising a temperature detection sensor for detecting the temperature of the fluid and a pressure sensor comprising a pressure detection element for detecting the pressure of the fluid;
The temperature sensor comprises the temperature sensor according to any one of claims 1 to 4.
An integrated sensor characterized by that. An integrated sensor comprising a temperature detection sensor for detecting the temperature of the fluid and a pressure sensor comprising a pressure detection element for detecting the pressure of the fluid;
The temperature sensor includes the temperature sensor according to claim 3,
The fluid that is the detection target that has passed through the fluid passage detects the pressure by acting on the pressure detection element,
An integrated sensor characterized by that .   The integrated sensor according to claim 5 or 6, wherein the housing of the temperature sensor does not have a seam in a region in contact with a path through which the fluid to be detected flows. A temperature sensing element, and a resin housing that houses the temperature sensing element,
  The said housing is a manufacturing method of the temperature sensor according to any one of claims 1 to 4 provided with an inner housing and an outer housing,
Holding the temperature sensing element such that a part is exposed by the inner housing;
The inner housing for holding the temperature detection element is disposed in a predetermined mold, and the injection molding is performed so as to cover the periphery of the inner housing including the exposed part of the temperature detection element to be held. Forming an outer housing;
A method for manufacturing a temperature sensor, comprising:

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