CN112781746A - Bottom temperature sensor - Google Patents
Bottom temperature sensor Download PDFInfo
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- CN112781746A CN112781746A CN202010180157.2A CN202010180157A CN112781746A CN 112781746 A CN112781746 A CN 112781746A CN 202010180157 A CN202010180157 A CN 202010180157A CN 112781746 A CN112781746 A CN 112781746A
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- temperature
- thermistor
- temperature sensing
- temperature sensor
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- 238000012360 testing method Methods 0.000 claims abstract description 124
- 239000011521 glass Substances 0.000 claims description 17
- 239000003822 epoxy resin Substances 0.000 claims description 10
- 229920000647 polyepoxide Polymers 0.000 claims description 10
- 238000005485 electric heating Methods 0.000 claims description 7
- 238000009529 body temperature measurement Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 229920006335 epoxy glue Polymers 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 description 19
- 238000006243 chemical reaction Methods 0.000 description 10
- 239000010408 film Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000004861 thermometry Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
- G01K1/12—Protective devices, e.g. casings for preventing damage due to heat overloading
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/0241—Structural association of a fuse and another component or apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/0241—Structural association of a fuse and another component or apparatus
- H01H2085/0266—Structural association with a measurement device, e.g. a shunt
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Nonlinear Science (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The bottom temperature sensor comprises a temperature sensing end head, a testing rod and an insulating thermistor, wherein one end of the temperature sensing end head is a temperature sensing surface, the other end of the temperature sensing end head is coupled with one end of the testing rod, the testing rod is provided with a space which is adjacent to the temperature sensing end head and is internally provided with the insulating thermistor, and the head part of the insulating thermistor is tightly attached to the inner side surface of the temperature sensing end head; and the lead of the insulated thermistor is led out from the test rod.
Description
Technical Field
Embodiments of the present disclosure relate to temperature sensors, and more particularly, to a bottom temperature sensor.
Background
In the existing electric heating appliance, the bottom of the vessel is accurately used for measuring the temperature, and the actual temperature change in the vessel is quickly reflected, which is always the target pursued by the industry. Meanwhile, in consideration of the pressure of the in-line cost, a product having a simple structure, which facilitates rapid assembly, is required. Due to the requirement of safety regulations, the purpose of safely using the electric appliance is ensured by adopting a dual control mode of a Temperature fuse and an NTC (negative Temperature coefficient) Temperature sensor. If the product is provided with a temperature fuse, the product can be freely used under the condition of IH (Induction Heating) temperature measurement and the condition of Heating and temperature measurement of an electric Heating plate, and the application prospect is immeasurable.
Most of bottom temperature sensors used in the market are products in the seventh and eighties of the last century, and the requirements of the epoch progress are far not met. No matter the temperature is accurately measured at the bottom of the vessel, or the actual temperature change in the vessel is quickly reflected, the problem is solved, and the improvement of the product performance is seriously hindered. We can see a subversive product push out to drive the whole industry to go on again at the moment.
Disclosure of Invention
The purpose of this disclosure is to solve the not enough of prior art, provides a temperature sensor. It has compact structure, small volume, fast reaction speed and no need of encapsulating with epoxy resin.
According to one aspect of the disclosure, a bottom temperature sensor is provided, which includes a temperature-sensing end, a testing rod, and an insulating thermistor, wherein one end of the temperature-sensing end is a temperature-sensing surface, and the other end of the temperature-sensing end is coupled with one end of the testing rod; and the lead of the insulated thermistor is led out from the test rod.
According to another aspect of the present disclosure, an insulating thermistor is provided, in which the thermistor has a single-ended glass-sealed structure, and the insulating thermistor is formed by at least directly covering and wrapping a head and pins of the single-ended glass-sealed thermistor with upper and lower films, or covering the head and the pins of the single-ended glass-sealed thermistor with insulating sleeves by using the head and the pins of the thermistor, or wrapping the head of the single-ended glass-sealed thermistor with epoxy resin; the head of the insulated thermistor is transversely placed in the inner space of the testing rod, so that the head of the insulated thermistor is tightly attached to the inner side surface of the temperature sensing end head sensing end surface.
According to an embodiment of the present disclosure, the single-ended glass-sealed thermistor head with oval glass is in a relatively perpendicular shape with the lead wire, placed in the inner space of the test rod.
According to the embodiment of the disclosure, the temperature resistance of the materials of the epoxy resin glue, the film and the sleeve is more than 120 ℃.
According to the embodiment of the disclosure, the head of the insulated thermistor is adhered to the inner side surface of the temperature sensing end head by using glue.
According to the embodiments of the present disclosure, the insulating thermistor is placed in the inner space of the test rod, and the insulating thermistor is fitted in the test rod without being fixed with epoxy resin.
According to the embodiment of the disclosure, the testing rod can be flush with the temperature sensing surface of the end surface of the shell of the temperature safety device and the temperature sensing surface of the end surface of the testing rod to form a part of the temperature sensing surface of the end surface, so that the shell of the temperature safety device and the testing rod are mutually fused into a whole; or
One part of the shell of the temperature safety device is contacted with the back side surface of the end surface of the test rod, so that the shell of the temperature safety device and the test rod are mutually fused into a whole; or
The side surface or the inner side surface of the test rod is provided with a structure matched with the shape of the shell of the temperature safety device, so that the shell of the temperature safety device and the test rod are mutually fused into a whole; or
The outer shell of the temperature safety device is provided with a structure for containing the test rod, so that the test rod is the outer shell of the temperature safety device.
According to the embodiment of the disclosure, one or more limiting devices are arranged on the outer wall of the testing rod and used for limiting the stroke of the spring sleeved on the outer wall of the testing rod in the vertical movement or for mounting and fixing, and each limiting device comprises a limiting block, a limiting ring, a limiting hole and a clamping spring and is mainly used for limiting the vertical displacement of the spring; or the screw teeth are arranged, so that the test rod is convenient to mount.
According to an embodiment of the present disclosure, the temperature-sensing tip is composed of a metal-containing material, or a ceramic material.
According to the embodiment of the disclosure, an upper cover and a lower cover can be added outside the test rod of the temperature sensor, and a spring is sleeved on the test rod to serve as the temperature sensor capable of movably measuring temperature in the environment of electric heating of the electric heating plate.
According to the embodiment of the disclosure, the test rod of the temperature sensor is sleeved with a spring to be used as a temperature sensor for movable temperature measurement in an IH electromagnetic heating environment.
The foregoing description is only an overview of the technical solutions of the present disclosure, and in order to make the technical means of the present disclosure more clearly understood, the present disclosure may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present disclosure more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
For a better understanding of the present disclosure, reference will be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1A is an exploded view of a rapid thermometry, bottom temperature sensor according to one embodiment of the present disclosure;
FIG. 1B is a top view of the temperature sensor shown in FIG. 1A according to one embodiment of the present disclosure;
FIG. 1C is a cross-sectional view of a temperature sensor taken from A-A' of FIG. 1B according to one embodiment of the present disclosure;
FIG. 2A is an exploded view of a rapid thermometric, bottom temperature sensor with one embodiment of a temperature fuse and spring;
FIG. 2B is a top view of the temperature sensor shown in FIG. 2A according to one embodiment of the present disclosure;
FIG. 2C is a cross-sectional view of a temperature sensor taken from B-B' of FIG. 2B according to one embodiment of the present disclosure;
FIG. 3A is an exploded schematic view of a rapid thermometric, bottom temperature sensor with one embodiment of a temperature fuse, upper cover, lower cover, and spring;
FIG. 3B is a top view of the temperature sensor shown in FIG. 3A according to another embodiment of the present disclosure;
FIG. 3C is a cross-sectional view of a temperature sensor taken from C-C' of FIG. 3B according to another embodiment of the present disclosure;
FIG. 4A is an exploded schematic view of a rapid thermometric, bottom temperature sensor with another embodiment of a temperature fuse, upper cover, lower cover, and spring;
FIG. 4B is a top view of the temperature sensor of FIG. 4A according to another embodiment of the present disclosure;
FIG. 4C is a cross-sectional view of a temperature sensor taken from D-D' of FIG. 4B, according to another embodiment of the present disclosure.
Detailed Description
Specific embodiments of the present disclosure will be described in detail below, with the understanding that the embodiments described herein are illustrative only and are not intended to limit the present disclosure. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, it will be apparent to one of ordinary skill in the art that: these specific details need not be employed to practice the present disclosure. In other instances, well-known structures, materials, or methods have not been described in detail in order to avoid obscuring the present disclosure.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the present disclosure. Thus, the appearances of the phrases "in one embodiment," "in an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, as used herein, the term "and/or" will be understood by those of ordinary skill in the art to include any and all combinations of one or more of the associated listed items.
Although the disclosure is illustrated and described below with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art upon the reading and understanding of this specification and the annexed drawings. In addition, particular features of several embodiments of the disclosure may be combined in any suitable manner, depending on the needs and/or benefits desired and/or desired, and such combinations are within the scope of the disclosure.
Aiming at the problems of the temperature sensor in the prior art, the embodiment of the disclosure provides the temperature sensor, wherein a shell of a temperature safety device and a test rod bearing a thermistor are mutually fused into a whole, and one part of the shell of the temperature safety device is contacted with a temperature sensing end head, or is flush with a temperature sensing surface, or becomes one part of the temperature sensing surface. The temperature sensor according to the scheme has the advantages of compact structure, small volume and extremely high reaction speed.
Fig. 1A is an exploded view of a rapid thermometry, bottom temperature sensor according to one embodiment of the present disclosure. FIG. 1B is a top view of the temperature sensor shown in FIG. 1A according to one embodiment of the present disclosure. FIG. 1C is a cross-sectional view of a temperature sensor taken from A-A' of FIG. 1A, according to one embodiment of the present disclosure.
As shown in fig. 1A, a rapid temperature measurement, bottom temperature sensor according to an embodiment of the present disclosure includes a temperature sensing tip 11, a testing rod 13, and an insulating thermistor 15.
The temperature sensing end head 11 is provided with a temperature sensing end face 111, the end head 11 is provided with a pin 113, and the end head 11 is fixed on the groove hole 138 of the test rod 13 after being bent, so that glue pouring is not needed for fixing. The lead wire 161 is connected to the metal temperature sensing tip 11 through the joint 17 and is connected to a ground wire. The temperature sensing tip 11 here is a metal extension.
As shown in fig. 1B and 1C, the temperature sensing end surface 111 of the tip 11 serves as the temperature sensing surface of the entire sensor, the entire insulating thermistor 15 is inserted into the internal space 137 of the test rod 13, the temperature sensing surface 132 is flush with the temperature sensing surface 134 of the test rod 13, and the lead pin 151 is led out from the card slot 131. The temperature sensing terminal 11 has a pin 113, and the terminal 11 is fixed in the slot 138 of the testing rod 13 after bending, so that the insulation thermistor 15 can be tightly attached to the inner side surface of the temperature sensing end surface 111 of the temperature sensing terminal 11 to sense the temperature change of the temperature sensing terminal. The pin 151 of the insulated thermistor 15 is led out through the card slot 131 and connected to an external control circuit.
The insulating thermistor 15 can be formed by covering the single-ended glass-sealed thermistor and the lead with at least upper and lower films, which contain glue on the inside and are bonded together by thermocompression. Because the thickness of the film is micron-sized, the single-end glass seal head part with the elliptic glass in the insulated thermistor is relatively vertical to the lead wire, and is transversely placed in the inner space 137 of the testing rod 13, and the head surface of the insulated thermistor is slightly higher than or flush with the temperature sensing surface 134 of the testing rod 13, so that the insulated thermistor is tightly attached to the inner side surface of the temperature sensing end surface 111 of the temperature sensing end head 11 in the largest area, the thermal reaction area of the thermistor can be increased, and the effect of quick reaction is achieved.
In fig. 1A, 1B and 1C, in order to facilitate the installation of the insulating thermistor, the head of the insulating thermistor may be adhered to the inner surface of the temperature sensing end face of the temperature sensing tip by an adhesive, and the insulating thermistor is assembled in the test bar without being fixed by epoxy resin. The end head, the test rod and the insulated thermistor form a sensor for quickly measuring the temperature and the bottom temperature.
FIG. 2A is an exploded view of a rapid thermometric, bottom temperature sensor with one embodiment of a temperature fuse and spring. Fig. 2B is a top view of the temperature sensor shown in fig. 2A according to one embodiment of the present disclosure. FIG. 2C is a cross-sectional view of a temperature sensor taken from B-B' of FIG. 2B, according to one embodiment of the present disclosure.
As shown in fig. 2A, the temperature sensor according to the embodiment of the present disclosure includes a temperature sensing tip 21, a temperature safety device 22, a test rod 23, and an insulating thermistor 25.
The temperature sensing end 21 is fixed on the limit hole 238 of the testing rod 23 by a circlip structure. The temperature sensing tip 21 is made of a ceramic material.
The temperature safety device 22 is embedded into the groove 232 on the side surface of the test rod, and the temperature sensing surface 234 of the test rod 23 is flush with the end surface 223 of the shell of the temperature safety device 22 to form a temperature sensing surface of the complete test rod, so that the temperature safety device 22, the test rod 23 and the temperature sensing end head 21 are completely integrated.
The test rod 23 is composed of an upper half 24 made of metal material and a lower half 26 made of non-metal material, the test rod 23 is provided with a hollow test rod body and can accommodate the insulation thermistor 25 and the temperature safety device 22; the temperature safety device 22 is wide at the top and narrow at the bottom, and the end surface 223 of the inverted wedge-shaped slot 232 embedded in the shell is flush with the end surface 234 of the test rod 23 to form a temperature sensing surface of the complete test rod. The pin 251 of the insulated thermistor 25 is led out from the through hole 231 through the inner space 237 of the test rod, and the pin 221 of the temperature fuse element 22 is led out from the inner space of the test rod. The end face 234 of the test rod 23 is tightly attached to the inner side face of the temperature sensing end face 211 of the temperature sensing end head 21, and a protruded limit ring 233 is arranged on or around the body.
The insulation thermistor 25 is provided with a pin of the single-end glass seal sleeved by an insulation sleeve 246, and the head part and the pin of the single-end glass seal sleeved by an insulation sleeve 247, the thermistor in the insulation thermistor 25 is of a single-end glass seal structure, the head part of the single-end glass seal with the elliptic glass in the insulation thermistor is relatively vertical to the lead wire and is transversely arranged in the inner space 237 of the test rod 23, and the surface of the head part is slightly higher than or flush with the temperature sensing surface 234 of the test rod 23, so that the insulation thermistor is tightly attached to the inner side surface of the temperature sensing end surface 211 of the temperature sensing end head 21 in the largest area. Therefore, the thermal reaction area of the thermistor head can be increased, and the effect of quick reaction is achieved.
As shown in fig. 2B and fig. 2C, after the temperature safety device 22 is inserted into the testing rod along the inverted wedge-shaped slot 232, the end surface 223 is substantially flush with the end surface 234 of the testing rod 23, the temperature sensing tip 21 first aligns the limiting hole 239 of the temperature sensing tip 21 with the limiting hole 238 of the testing rod, and the temperature sensing tip 21 is fixed on the limiting hole 238 of the testing rod by the clamp spring 236. The head of the insulation thermistor 25 is bent and transversely placed on the surface of the inner space 237 of the test rod 23, the surface of the single-end glass seal is slightly higher than or basically flush with the temperature sensing surface 234 of the test rod 23, the other surface of the head of the insulation thermistor 25 is tightly attached to the inner side surface of the temperature sensing end surface 211 of the end head 21, and the pin 251 of the insulation thermistor is led out through the through hole 231 of the test rod 23 and connected with an external control circuit. The working temperature of the temperature fuse is higher than that of the thermistor, so that the safe use of the electric appliance is ensured.
In fig. 2A, 2B and 2C, in order to facilitate the mounting of the insulating thermistor, the head of the insulating thermistor may be adhered to the inner surface of the temperature sensing end face of the temperature sensing tip by an adhesive, and the insulating thermistor is assembled in the test bar without being fixed by epoxy resin.
The shell of the temperature safety device is provided with a structure matched with the shell of the test rod in shape, one part of the temperature sensing surface of the shell of the temperature safety device and the temperature sensing surface of the test rod are positioned on the same plane and are contacted with the back side surface of the temperature sensing surface of the end head, so that the temperature safety device, the test rod and the end head are mutually fused into a whole.
The temperature safety device 22 of the illustrated embodiment is located at the center of the testing rod 23, and the temperature sensing surface of the temperature safety device 22 is flush with the temperature sensing surface of the testing rod 23, so that the temperature safety device 22, the testing rod 23 and the temperature sensing end head 21 are integrated with each other. The insulation thermistor 25 and the temperature safety device 22 are in contact with the inner side surface of the temperature sensing end surface 211 of the temperature sensing end head 21, and synchronously sense the temperature change of the temperature sensing end head 21.
FIG. 3A is an exploded view of a rapid thermometric, bottom temperature sensor with one embodiment of a temperature fuse, upper cover, lower cover, and spring. Fig. 3B is a top view of the temperature sensor shown in fig. 3A according to another embodiment of the present disclosure. FIG. 3C is a cross-sectional view of a temperature sensor taken from C-C' of FIG. 3B, according to another embodiment of the present disclosure.
As shown in fig. 3A, a fast temperature measuring and bottom temperature sensor includes a temperature sensing tip 31, a temperature safety device 32, a testing rod 33, and an insulating thermistor 35. The movable part comprises a spring 34, an upper cover 38, a lower cover 39, an upper cover accommodating cavity 3010, a lower cover accommodating cavity 3011 and a fixing screw hole 381.
The temperature sensing end face 323 of the temperature safety device 32 is flush with the temperature sensing end face 334 of the testing rod, and the side face of the testing rod 33 is provided with a structure matched with the shape of the shell of the temperature safety device 32, namely, a convex strip of the temperature safety device 32 and a groove structure of the testing rod 33 are completely integrated. And the temperature sensing end face 323 of the temperature safety device 32 becomes a part of the temperature sensing end face 323 of the entire test bar 33.
The temperature sensing end surface 334 of the testing rod 33 is basically flush with the temperature sensing end surface 323 of the temperature safety device 32, an inner space 337 for placing an insulated thermistor is arranged in the testing rod, the pin of the inner space is led out through a through hole 331 in the testing rod 33, a limiting ring 333 is arranged at the upper part of the outer wall of the testing rod 33, and the spring moves up and down between the limiting ring 333 and the lower cover 39.
As shown in fig. 3B and 3C, the housing of the temperature safety device 32 is inserted into the groove 332 on the side surface of the test rod 33, and the end surface 323 is flush with the temperature sensing end surface 334 of the test rod 33. The insulating thermistor 35 is integrally inserted into the inner space 337 of the test rod 33. The pin 321 of the temperature safety device 32 is led out from the side surface of the testing rod 33, the head of the insulated thermistor is pressed in the inner space 337, the pin is led out through the through hole 331 in the testing rod 33, and the pin 313 of the temperature sensing end head 31 is fixed in the groove hole 338 of the testing rod 33 after being bent. The insulation thermistor 35 and the temperature safety device 32 are both closely attached to the inner side surface of the temperature sensing end face 311 of the temperature sensing tip 31. The temperature sensing terminal 31 is led out from the connecting line 361 through the connector 37 and connected with the grounding wire.
The insulation thermistor is covered on the single-end glass-sealed thermistor and the rubber of the pin by epoxy resin, the head part of the single-end glass-sealed thermistor with the elliptic glass in the insulation thermistor is relatively vertical to the lead wire and is transversely placed in the inner space 337 of the test rod 33, and the surface of the head part is slightly higher than or flush with the temperature sensing end surface 334 of the test rod 33, so that the insulation thermistor is tightly attached to the inner side surface of the temperature sensing end surface 311 of the temperature sensing end head 31 in the largest area, the thermal reaction area of the thermistor can be increased, and the effect of quick reaction is achieved.
The upper cover 38, the lower cover 39, the spring 34 and the rapid temperature measuring and bottom temperature sensor jointly form a movable rapid temperature measuring and bottom temperature sensor.
In the process that the spring 34 moves up and down, the upper cover accommodating cavity 3010, the lower cover accommodating cavity 3011 and the test rod 33 are kept separated. Wherein the upper part of the spring is limited by the upper limit ring 333 on the outer wall of the test rod 33, and the lower part is limited by the position of the lower cover accommodating cavity 3011 of the lower cover 39, and moves up and down in the process. The limiting ring 333 is limited by the position of the upper cover accommodating cavity 3010 of the upper cover 38, and the temperature sensing surface 311 of the tip 31 is higher than the plane of the upper cover accommodating cavity 3010. The upper cover 38 and the lower cover 39 fix the testing rod 33 on the screw hole 381 by screws, so as to form a movable quick temperature measuring and bottom temperature sensor.
During the mounting process, the insulating thermistor 35 can be closely attached to the back surface of the temperature sensing end surface 334 of the test rod 33. The lead 351 of the insulated thermistor 35 is led out through the through hole 331 of the test rod 33 and connected to an external control circuit.
The temperature sensing surface of the end face of the shell of the temperature safety device is flush with the temperature sensing surface of the end face of the testing rod to form a part of the temperature sensing surface of the end face, and the part of the shell of the temperature safety device is contacted with the back side face of the end face of the testing rod, so that the shell of the temperature safety device and the testing rod are mutually fused into a whole.
In other embodiments, the housing of the temperature safety device has a structure that houses the test stick such that the test stick is the temperature safety device housing.
FIG. 4A is an exploded view of another embodiment of a rapid temperature measurement, bottom temperature sensor with a temperature fuse, upper cap, lower cap, and spring. Fig. 4B is a top view of the temperature sensor shown in fig. 4A according to another embodiment of the present disclosure. FIG. 4C is a cross-sectional view of a temperature sensor taken from D-D' of FIG. 4B, according to another embodiment of the present disclosure.
The embodiment shown in figures 4A, 4B and 4C differs from the embodiment shown in figures 3A, 3B and 3C in that the upper cover 48 and the temperature sensing tip 41 of the embodiment shown in figures 4A, 4B and 4C move up and down with the spring, in that only the temperature sensing tip 31 moves with the spring 34 in the embodiment shown in figures 3A, 3B and 3C, and in that the upper cover 38 and the lower cover 39 are fixed. In the embodiment shown in fig. 3A, 3B and 3C, the insulation thermistor is covered with epoxy resin at the head portion and the lead root portion of the single-ended glass seal. The same principle is used here to wrap the header and leads of the single-ended envelope as in the embodiment of fig. 4A, 4B and 4C where one or more films are applied together by high temperature heat pressing. The single-end glass sealing head part with the elliptic glass in the insulated thermistor is in a relatively vertical shape with the lead, and is transversely placed in the inner space of the test rod, and the surface of the head part of the insulated thermistor is slightly higher than or flush with the temperature sensing surface of the test rod, so that the insulated thermistor is tightly attached to the inner side surface of the temperature sensing end head temperature sensing end surface in the largest area, the thermal reaction area of the thermistor can be increased, and the effect of quick reaction is achieved.
In fig. 3A, 3B and 3C and fig. 4A, 4B and 4C, in order to facilitate the mounting of the insulating thermistor, the head of the insulating thermistor may be adhered to the inner surface of the temperature sensing end face of the temperature sensing tip by adhesive, and the insulating thermistor is mounted in the test bar without being fixed by epoxy resin.
In the embodiment shown in fig. 4A, 4B and 4C, the snap spring 440 fixes the upper cover 48 in the snap groove 435 under the test rod 43, and puts the spring 44 and the lower cover 49 into the snap groove, and the extension arm 472 on the lower cover 49 penetrates into the fixing hole 471 of the upper cover 48 and bends, so that the spring 44 moves up and down in the extension arm 472 in the upper cover and the lower cover, and the upper cover 48 and the temperature sensing tip 41 in fig. 4 move up and down along with the spring, while the lower cover 49 does not move. In fig. 3, only the temperature sensing tip 31 moves together, and the upper cover 38 and the lower cover 39 are fixed.
In fig. 4A, 4B and 4C, the insulating thermistor 45 is a thin film temperature sensor bent at about 90 degrees, and is formed by covering the single-ended glass-sealed thermistor and the lead with at least upper and lower films, respectively, and bonding the inner sides of the films together by thermocompression. Because the thickness of the film is micron-sized, the elliptic glass with the longest two points at the head of the single-end glass seal in the insulated thermistor and the lead are relatively vertical, and the insulated thermistor is transversely placed in the inner space 437 of the testing rod 43, and the surface of the head of the insulated thermistor is slightly higher than or flush with the temperature sensing surface 434 of the testing rod 43, so that the insulated thermistor is tightly attached to the inner side surface of the temperature sensing end face 411 of the temperature sensing end 41 in the largest area, and the thermal reaction area of the thermistor can be increased, and the effect of quick reaction can be achieved.
In the embodiment shown in fig. 4A, 4B and 4C, the pressing plate 437 presses the insulation thermistor to be fixed in the inner space 432 of the testing rod, so as to ensure that the insulation thermistor does not move and make the single-end glass seal tightly contact with the inner side surface of the temperature sensing end face 411 of the temperature sensing end 41.
In the above embodiment, the materials of the film, the sleeve, and the epoxy glue are resistant to temperatures greater than 120 ℃.
In other embodiments, an upper cover and a lower cover can be added outside the test rod of the temperature sensor, and a spring is sleeved on the test rod to be used as a temperature sensor capable of movably measuring temperature in an environment of electric heating of the electric heating plate.
While the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present disclosure may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (11)
1. The bottom temperature sensor is characterized by comprising a temperature sensing end head, a testing rod and an insulating thermistor, wherein one end of the temperature sensing end head is a temperature sensing surface, the other end of the temperature sensing end head is coupled with one end of the testing rod, the testing rod is provided with a space which is adjacent to the temperature sensing end head and is internally provided with the insulating thermistor, the head of the insulating thermistor is tightly attached to the inner side surface of the temperature sensing end head, and a lead of the insulating thermistor is led out from the testing rod.
2. The temperature sensor according to claim 1, wherein the thermistor in the insulating thermistor is of a single-ended glass-sealed structure, and the insulating thermistor is formed by directly covering and wrapping a head part and a pin of the single-ended glass-sealed thermistor by at least upper and lower films, or is formed by covering the head part and the pin of the single-ended glass-sealed thermistor by an insulating sleeve, or is formed by wrapping the head part of the single-ended glass-sealed thermistor by epoxy resin; the head of the insulated thermistor is transversely placed in the inner space of the testing rod, so that the head of the insulated thermistor is tightly attached to the inner side surface of the temperature sensing end head sensing end surface.
3. The temperature sensor of claim 2, wherein the single-ended glass-sealed thermistor head with oval glass is in a relatively perpendicular shape with the lead wires and is placed in the inner space of the test rod.
4. The temperature sensor of claim 2, wherein the film, sleeve, and epoxy glue are made of a material that is resistant to temperatures greater than 120 ℃.
5. The temperature sensor according to claim 1, wherein only the head portion of the insulated thermistor is adhered to the inner surface of the temperature sensing tip.
6. The temperature sensor of claim 1, wherein the insulating thermistor is disposed in the internal space of the test rod, and the insulating thermistor is fitted in the test rod without being fixed with epoxy.
7. The temperature sensor according to claim 1, wherein the testing rod is further flush with the temperature sensing surface of the end surface of the housing of the temperature safety device and the temperature sensing surface of the end surface of the testing rod to form a part of the temperature sensing surface of the end surface, so that the housing of the temperature safety device and the testing rod are integrated with each other; or
One part of the shell of the temperature safety device is contacted with the back side surface of the end surface of the test rod, so that the shell of the temperature safety device and the test rod are mutually fused into a whole; or
The side surface or the inner side surface of the test rod is provided with a structure matched with the shape of the shell of the temperature safety device, so that the shell of the temperature safety device and the test rod are mutually fused into a whole; or
The outer shell of the temperature safety device is provided with a structure for containing the test rod, so that the test rod is the outer shell of the temperature safety device.
8. The temperature sensor according to claim 1, wherein the outer wall of the testing rod is provided with one or more limiting devices for limiting the stroke of the up-and-down movement of the spring sleeved on the outer wall of the testing rod or for mounting and fixing, and the limiting devices comprise limiting blocks, limiting rings, limiting holes and clamping springs and are mainly used for limiting the up-and-down movement of the spring; or the screw teeth are arranged, so that the test rod is convenient to mount.
9. The temperature sensor of claim 1, wherein the temperature sensing tip is comprised of a metal containing material or a ceramic material.
10. The temperature sensor of claim 1, wherein the test rod of the temperature sensor is additionally provided with an upper cover, a lower cover and a spring, and is used as a temperature sensor capable of movably measuring temperature in an environment in which the electric heating plate is electrically heated.
11. The temperature sensor of claim 1, wherein the test rod of the temperature sensor is spring-loaded as a temperature sensor movable for temperature measurement in an IH electromagnetically heated environment.
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| CN2019110840003 | 2019-11-07 | ||
| CN201921912167X | 2019-11-07 | ||
| CN201921912167 | 2019-11-07 | ||
| CN201911084000 | 2019-11-07 |
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| CN112781746A true CN112781746A (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010180159.1A Pending CN112781747A (en) | 2019-11-07 | 2020-03-16 | Integrated temperature sensor with temperature fuse |
| CN202010180157.2A Pending CN112781746A (en) | 2019-11-07 | 2020-03-16 | Bottom temperature sensor |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010180159.1A Pending CN112781747A (en) | 2019-11-07 | 2020-03-16 | Integrated temperature sensor with temperature fuse |
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| CN112781747A (en) | 2021-05-11 |
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