CN217716700U

CN217716700U - Cooling liquid temperature sensor

Info

Publication number: CN217716700U
Application number: CN202221385780.2U
Authority: CN
Inventors: 李文庚; 张增员; 李友强; 李友兵; 陈何兰
Original assignee: Mingxing Sensor Technology Huizhou Co ltd
Current assignee: Mingxing Sensor Technology Huizhou Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-11-01
Anticipated expiration: 2032-06-02

Abstract

The application relates to a coolant temperature sensor, including: the outer wall of the protective shell is provided with external threads, the protective shell is provided with a detecting head, and the detecting head is provided with a circular immersion piece; the sensor comprises a sealing rubber ring, a thermistor, an epoxy resin layer and a heat-conducting silica gel layer, wherein the sealing rubber ring is sleeved on the outer wall of the protective shell, the sealing rubber ring is positioned right above the external thread, the thermistor is packaged in the detecting head through the epoxy resin layer, the heat-conducting silica gel layer is filled between the thermistor and the detecting head, and the thermistor is provided with a first connecting pin and a second connecting pin; the connector, on the protective housing was located to the connector, the connector had first interface and second interface, and first interface is connected with first connecting foot, and the second interface is connected the foot with the second. Because the immersion piece is that the whole immersion cooling liquid directly contacts with the cooling liquid, can ensure the accuracy that detects the cooling liquid temperature well.

Description

Cooling liquid temperature sensor

Technical Field

The application relates to the technical field of temperature sensors, in particular to a cooling liquid temperature sensor.

Background

The automobile engine is cooled by the cooling system, and the cooling system is an important part for ensuring the normal starting of the automobile engine, so that the temperature of the cooling liquid in the cooling system needs to be monitored in real time to prevent the overheating phenomenon of the cooling liquid.

In the related art, the real-time monitoring of the temperature of the cooling liquid is realized by adopting a temperature sensor, a detection head of the temperature sensor is utilized to sleeve a cooling liquid pipeline, the detection head transmits the temperature of the pipeline to the thermistor to cause the resistance value of the thermistor to change, and an external measuring device reads the current resistance value of the thermistor to measure the temperature. Since the probe head transmits the temperature of the tubing rather than the temperature of the coolant, this affects the accuracy of the temperature measurement.

SUMMERY OF THE UTILITY MODEL

For solving or the problem that exists among the part solution correlation technique, the application provides a coolant temperature sensor, can ensure the accuracy that detects the coolant temperature.

The present application provides in a first aspect a coolant temperature sensor comprising:

the outer wall of the protective shell is provided with external threads, the protective shell is provided with a detecting head, and the detecting head is provided with a circular immersion piece;

the sensor comprises a sealing rubber ring, a thermistor, an epoxy resin layer and a heat-conducting silica gel layer, wherein the sealing rubber ring is sleeved on the outer wall of the protective shell, the sealing rubber ring is positioned right above the external thread, the thermistor is packaged in the detecting head through the epoxy resin layer, the heat-conducting silica gel layer is filled between the thermistor and the detecting head, and the thermistor is provided with a first connecting pin and a second connecting pin;

the connector is arranged on the protective shell and provided with a first inserting interface and a second inserting interface, the first inserting interface is connected with the first connecting pin, and the second inserting interface is connected with the second connecting pin.

Preferably, the immersion member is provided with a residual liquid discharge hole at a position far away from the protective shell.

Preferably, a guide ring edge is arranged at the position of the side wall of the residual liquid discharge hole.

Preferably, a protecting sleeve is arranged at the position, far away from the immersion piece, of the connecting head.

Preferably, the protective sleeve is provided with a wire harness clamping groove at two side positions.

Preferably, the outer wall of the probe head is provided with an anti-corrosion layer.

Preferably, the protective shell further comprises a hexagon nut head, and the hexagon nut head is connected with the protective shell.

Preferably, the hexagon nut head and the protective shell are of an integrally formed structure.

Preferably, the sensor further comprises a first auxiliary connecting line and a second auxiliary connecting line, one end of the first auxiliary connecting line is connected with the first connecting pin, the other end of the first auxiliary connecting line is connected with the first interface, one end of the second auxiliary connecting line is connected with the second connecting pin, and the second auxiliary connecting line is connected with the second interface.

The technical scheme provided by the application can comprise the following beneficial effects:

according to the technical scheme, the outer wall of the protective shell is provided with external threads, the protective shell is provided with a detecting head, and the detecting head is provided with a circular immersion piece; the sensor comprises a sealing rubber ring, a thermistor, an epoxy resin layer and a heat-conducting silica gel layer, wherein the sealing rubber ring is sleeved on the outer wall of the protective shell, the sealing rubber ring is positioned right above the external thread, the thermistor is packaged in the detecting head through the epoxy resin layer, the heat-conducting silica gel layer is filled between the thermistor and the detecting head, and the thermistor is provided with a first connecting pin and a second connecting pin; the connector, on the protective housing was located to the connector, the connector had first interface and second interface, and first interface is connected with first connecting foot, and the second interface is connected the foot with the second.

When the temperature of coolant liquid needs to be detected, the temperature sensor is installed on the coolant liquid pipeline through the external threads, the immersion piece can be immersed into the coolant liquid in a whole mode, the immersion piece sequentially transfers the heat of the coolant liquid to the protective shell, the heat conduction silica gel layer and the thermistor to cause the resistance value of the thermistor to change, and the external measuring device reads the resistance value of the thermistor through the connector to complete the temperature detection of the coolant liquid. Because the immersion piece is that the whole immersion cooling liquid directly contacts with the cooling liquid, can ensure the accuracy that detects the cooling liquid temperature well.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 shows an assembled schematic view of a coolant temperature sensor in an embodiment of the present application;

fig. 2 shows an assembled view of the coolant temperature sensor from another perspective in an embodiment of the present application;

fig. 3 shows a cut-away schematic view of a coolant temperature sensor in an embodiment of the present application;

FIG. 4 is an enlarged view of a portion of FIG. 1 with respect to the dip member;

fig. 5 is a partially enlarged view of fig. 2 about the connection head.

Reference numerals: a coolant temperature sensor 10; a protective shell 100; a sensor 200; a connector 300; an external thread 110; a probe head 120; a dip member 121; a sealing rubber ring 210; a thermistor 220; an epoxy resin layer 230; a thermally conductive silicone adhesive layer 240; a first connection pin 221; a second connecting leg 222; a first interface 310; a second interface 320; a residue discharge 1211; a deflector skirt 1211a; a protective jacket 330; a wire harness catching groove 331; an anti-corrosion layer 121; a hex nut head 400; a first auxiliary connection line 250; and a second auxiliary connection line 260.

Detailed Description

Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application have been illustrated in the accompanying drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In the related art, since the probe of the temperature sensor transmits the temperature of the pipeline, but not the temperature of the cooling liquid, the accuracy of detecting the temperature of the cooling liquid is affected. Therefore, to above-mentioned technical problem, the embodiment of the present application provides a coolant temperature sensor, can ensure the accuracy that detects the coolant temperature.

The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 1 shows an assembled schematic view of a coolant temperature sensor in an embodiment of the present application; fig. 2 shows an assembled view of the coolant temperature sensor from another perspective in an embodiment of the present application; fig. 3 is a schematic sectional view showing a coolant temperature sensor in the embodiment of the present application; FIG. 4 is an enlarged view of a portion of FIG. 1 with respect to the immersion element; fig. 5 is a partially enlarged view of fig. 2 about the connection head.

Referring to fig. 1 and 3, a coolant temperature sensor 10 includes: protective shell 100, sensor 200 and connector 300. It should be noted that the protective shell 100 plays a role of protection and encapsulation. The sensor 200 cooperates with an external measuring device to perform the temperature sensing function. The connection head 300 is a connection part of the external measuring device and the coolant temperature sensor 10.

Referring to fig. 1 and 2, the outer wall of the protective shell 100 is provided with an external thread 110, the protective shell 100 is provided with a probe 120, and the probe 120 is provided with an annular immersion member 121. The male screw 110 is configured to attach the coolant temperature sensor 10, and the coolant temperature sensor 10 is attached to the coolant pipe by screwing by forming a threaded hole in the coolant pipe in advance. The probe head 120 is a structural member that encapsulates a thermistor. The immersion element 121 is a structural element that is in direct contact with the cooling liquid.

Referring to fig. 3, the sensor 200 includes a sealing rubber ring 210, a thermistor 220, an epoxy layer 230 and a thermal conductive silicone layer 240, the sealing rubber ring 210 is sleeved on the outer wall of the protective shell 100, the sealing rubber ring 210 is located right above the external thread 110, the thermistor 220 is encapsulated in the probe 120 through the epoxy layer 230, the thermal conductive silicone layer 240 is filled between the thermistor 220 and the probe 120, and the thermistor 220 has a first connection pin 221 and a second connection pin 222.

It should be noted that the sealing rubber ring 210 plays a role of sealing to prevent the coolant in the coolant pipeline from flowing out. The thermistor 220 is used for detecting the temperature of the cooling liquid with an external measuring device, and when the temperature of the thermistor 220 changes, the resistance value of the thermistor also changes correspondingly. The epoxy layer 230 is used to encapsulate the thermistor 220. The thermal conductive silicone layer 240 serves to improve the heat transfer efficiency.

Referring to fig. 2 and 3, the connector 300 is disposed on the protective shell 100, the connector 300 has a first socket 310 and a second socket 320, the first socket 310 is connected to the first connection pin 221, and the second socket 320 is connected to the second connection pin 222. It should be noted that the connection head 300 is connected to an external measurement device through the first interface 310 and the second interface 320.

When the temperature of the cooling liquid needs to be detected, the temperature sensor is mounted on the cooling liquid pipeline through the external threads 110, the immersion part 121 is immersed into the cooling liquid, the immersion part 121 transfers the heat of the cooling liquid to the protective shell 100, the heat-conducting silica gel layer 240 and the thermistor 220 in sequence (the arrow direction shown in fig. 3 is the direction of heat transfer), so that the resistance value of the thermistor 220 changes, and an external measuring device reads the resistance value of the thermistor 220 through the connector to complete the temperature detection of the cooling liquid. Because immersion part 121 is that whole immersion coolant liquid directly contacts with the coolant liquid, can ensure the accuracy that detects the coolant liquid temperature well.

Referring to fig. 4, further, in some embodiments, the immersion member 121 is provided with a residual liquid discharge 1211 at a position away from the protective shell 100. It should be noted that, since the coolant in the coolant pipe does not always flow circularly and the immersion member 121 is annular as a whole, when the coolant stops flowing, a part of the coolant remains in the immersion member 121, and the remaining coolant itself has a certain amount of heat, and if the heat is transferred to the thermistor 220 at this time, the resistance value of the thermistor 220 is changed. Therefore, in consideration of the above, by providing the residual liquid discharge hole 1211, the coolant remaining in the dipping member 121 flows toward the residual liquid discharge hole 1211 along the side wall of the dipping member 121 and is finally discharged from the residual liquid discharge hole 1211, thereby preventing the residual coolant from unnecessarily causing the resistance value of the thermistor 220 to change.

Referring to fig. 4, in some embodiments, a flow guide ring 1211a is disposed on a sidewall of the raffinate discharge hole 1211. It should be noted that the annular side 1211a serves as a flow guide to accelerate the discharge efficiency of the coolant.

Referring to fig. 2, further, in some embodiments, a protective sleeve 330 is disposed at a position of the connector 300 away from the immersion member 121. It should be noted that the protecting sleeve 330 plays a role of protecting, and prevents the first interface 310 and the second interface 320 of the connector 300 from being damaged by foreign objects.

Referring to fig. 5, in some embodiments, the protecting sleeve 330 is provided with a wire harness fastening groove 331 at two sides. It should be noted that the wire harness fastening groove 331 plays a role of fixing the wire harness, and when the connecting piece of the external measuring device is inserted into the first inserting port 310 and the second inserting port 320, the wire harness portion of the connecting piece of the external measuring device is inserted into the wire harness fastening groove 331, so that the fixing and the arranging of the wire harness are completed.

Referring to FIG. 3, further, in some embodiments, the outer wall of the probe head 120 is provided with an anti-corrosion layer 121. The anti-corrosion layer 121 can prevent corrosion and prevent the probe head 120 from being damaged by the coolant.

Referring to fig. 2, further, in some embodiments, the coolant temperature sensor 10 further includes a hexagon nut head 400, and the hexagon nut head 400 is connected to the protective shell 100. It should be noted that the hexagon nut head 400 is provided to facilitate the installation of the coolant temperature sensor 10 by an installer. Specifically, the hexagon nut head 400 and the protective shell 100 are integrally formed.

Referring to fig. 3, further, in some embodiments, the sensor 200 further includes a first auxiliary connection line 250 and a second auxiliary connection line 260, one end of the first auxiliary connection line 250 is connected to the first connection pin 221, the other end of the first auxiliary connection line 250 is connected to the first socket 310, one end of the second auxiliary connection line 260 is connected to the second connection pin 222, and the second auxiliary connection line 260 is connected to the second socket 320.

It should be noted that, the first auxiliary connection line 250 and the second auxiliary connection line 260 are arranged so that the external measuring device can read the current resistance value of the thermistor 220 when the connection line between the first connection pin 221 and the first jack 310 fails and the connection line between the second connection pin 222 and the second jack 320 fails.

The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings. In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. Those skilled in the art should also appreciate that the acts and modules referred to in the specification are not necessarily required in the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application may be sequentially adjusted, combined, and deleted according to actual needs, and the modules in the device of the embodiment of the present application may be combined, divided, and deleted according to actual needs.

The foregoing description of the embodiments of the present application has been presented for purposes of illustration and description and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or improvements to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A coolant temperature sensor, characterized by comprising:

2. The coolant temperature sensor according to claim 1, wherein the immersion member is opened with a residual liquid discharge hole at a position away from the protective case.

3. The coolant temperature sensor according to claim 2, wherein a deflector collar is provided at a position of a side wall of the residual liquid discharge hole.

4. The coolant temperature sensor according to claim 1, wherein a protective sleeve is provided at a position of said connection head remote from said immersion member.

5. The coolant temperature sensor according to claim 4, wherein the protector is provided with a wire harness snap groove at both side positions.

6. The coolant temperature sensor of claim 1 wherein the outer wall of the probe is provided with a corrosion protection layer.

7. The coolant temperature sensor according to any one of claims 1 to 6, further comprising a hexagon nut head, the hexagon nut head being connected to the protective shell.

8. The coolant temperature sensor of claim 7, wherein the hex nut head and the shield shell are of an integrally formed structure.

9. The coolant temperature sensor according to claim 1, wherein the sensor further includes a first auxiliary connection line and a second auxiliary connection line, one end of the first auxiliary connection line is connected to the first connection pin, the other end of the first auxiliary connection line is connected to the first socket, one end of the second auxiliary connection line is connected to the second connection pin, and the second auxiliary connection line is connected to the second socket.