CN212621163U - Temperature measuring circuit and household appliance - Google Patents
Temperature measuring circuit and household appliance Download PDFInfo
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- CN212621163U CN212621163U CN202021743985.4U CN202021743985U CN212621163U CN 212621163 U CN212621163 U CN 212621163U CN 202021743985 U CN202021743985 U CN 202021743985U CN 212621163 U CN212621163 U CN 212621163U
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- 230000005676 thermoelectric effect Effects 0.000 description 4
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Abstract
The application provides a temperature measurement circuit and domestic appliance, this temperature measurement circuit includes: the temperature measuring device comprises a thermocouple, a signal amplifying circuit and a micro control unit, wherein a temperature measuring unit is arranged in the micro control unit; the cold end of the thermocouple is connected with the input end of the signal amplification circuit, and the output end of the signal amplification circuit is connected with the micro control unit; the micro control unit receives the voltage signal output by the signal amplifying circuit and the temperature measurement result of the temperature measurement unit so as to determine the hot end temperature of the thermocouple, and the temperature measurement accuracy is improved.
Description
Technical Field
The embodiment of the application relates to the technical field of household appliances, in particular to a temperature measuring circuit and a household appliance.
Background
When two different conductors or semiconductors a and B form a loop, and the two ends of the loop are connected to each other, as long as the temperatures at the two connection points are different, one end is at T, called working end or hot end, and the other end is at T0, called free end (also called reference end) or cold end, an electromotive force is generated in the loop, and the direction and magnitude of the electromotive force are related to the materials of the conductors and the temperatures of the two connection points. This phenomenon is called thermoelectric effect, the loop formed by the two conductors is called thermocouple, and the electromotive force generated is called thermoelectric force.
Theoretically, the cold end of the thermocouple is measured by taking 0 ℃ as a standard, the corresponding relation between the thermoelectromotive force when the cold end is 0 ℃ and the hot end temperature is represented by the score table of the thermocouple, and when the cold end is kept at 0 ℃, the hot end temperature can be directly obtained through the score table according to the measured thermoelectromotive force.
However, in practical applications, the thermocouple is usually at room temperature or in a specific environment during temperature measurement, and the temperature of the cold end is often changed and cannot be kept at 0 ℃ usually, so that the measurement result is inaccurate.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a temperature measurement circuit and a household appliance to improve the accuracy of temperature measurement.
In a first aspect, the present application provides a temperature measurement circuit comprising: the temperature measuring device comprises a thermocouple, a signal amplifying circuit and a micro control unit, wherein a temperature measuring unit is arranged in the micro control unit;
the cold end of the thermocouple is connected with the input end of the signal amplification circuit, and the output end of the signal amplification circuit is connected with the micro control unit; and the micro control unit receives the voltage signal output by the signal amplification circuit and reads the temperature measurement result of the temperature measurement unit so as to determine the hot end temperature of the thermocouple.
The temperature measuring circuit directly connects the cold end of the thermocouple with the signal amplifying circuit and the micro control unit, so that the temperature of the micro control unit is consistent with the cold end temperature of the thermocouple, the micro control unit can utilize the temperature value detected by the built-in temperature measuring unit to perform cold end compensation as the cold end temperature of the thermocouple, and the accuracy of temperature detection is improved. And the temperature measurement unit which is universal and built-in for the micro control unit is adopted for temperature detection, no additional circuit or device is needed, the structure is simple, the cost is low, the micro control unit is strictly calibrated when leaving a factory, and the temperature is accurate and reliable.
In one possible implementation, the signal amplification circuit and the micro control unit are disposed on a circuit board.
In one possible implementation, the circuit board is disposed in a closed space.
In a possible implementation, the cold end of the thermocouple is connected to the socket of the circuit board to be connected to the input end of the signal amplification circuit through a connection terminal.
In the temperature measuring circuit, the signal amplifying circuit and the micro control unit are arranged on the circuit board in the closed space, and the cold end of the thermocouple is connected with the signal amplifying circuit and the micro control unit through the socket of the circuit board, so that the temperature of the micro control unit can be kept consistent with the temperature of the cold end of the thermocouple, the micro control unit can utilize the temperature value detected by the built-in temperature measuring unit as the cold end temperature of the thermocouple to perform cold end compensation, and the accuracy of temperature detection is improved.
In one possible implementation, the micro control unit is arranged on the side of the circuit board away from the hot end of the thermocouple.
In the temperature measuring circuit, the micro control unit is arranged on one side of the circuit board, which is far away from the hot end of the thermocouple, so that the temperature of the micro control unit is consistent with the cold end temperature of the thermocouple, and the micro control unit can utilize the temperature value detected by the built-in temperature measuring unit as the cold end temperature of the thermocouple to perform cold end compensation, thereby improving the accuracy of temperature detection.
In a possible implementation, the output of the signal amplification circuit is connected to an analog-to-digital conversion port of the micro control unit.
In one possible implementation, the temperature measuring unit is a temperature sensor.
In one possible implementation, the current of the micro control unit is smaller than a preset value, and the preset value enables the temperature of the micro control unit and the temperature of the cold end of the thermocouple to be the same or approximately the same.
In the temperature measuring circuit, because the current of the micro control unit is smaller than the preset value when the micro control unit works, the micro control unit does not generate heat or generates heat negligibly in the working process, so that the temperatures of all devices of the signal amplifying circuit and the micro control unit are the same or approximately the same at the same moment, and the temperature of the micro control unit is the same or approximately the same as the temperature of the cold end of the thermocouple. Therefore, the micro control unit carries out temperature detection through the temperature measuring unit arranged in the micro control unit to obtain the temperature value of the micro control unit, and the temperature value can be used as the cold end temperature of the thermocouple, so that the accuracy of temperature detection is improved.
In one possible implementation, the current of the micro-control unit is in the milliamp range.
In a second aspect, the present application provides a household appliance comprising: a temperature measurement circuit as claimed in any one of the first aspect.
The application provides a temperature measurement circuit and domestic appliance, this temperature measurement circuit utilizes the thermoelectric effect of thermocouple to carry out temperature measurement, this temperature measurement circuit is direct with the cold junction of thermocouple and signal amplification circuit and little the control unit connection, make the temperature of little the control unit and the cold junction temperature of thermocouple keep unanimous, thereby little the control unit can utilize the temperature value that built-in temperature measurement unit detected to carry out the cold junction compensation as the cold junction temperature of thermocouple, thereby temperature detection's accuracy has been improved. And the temperature measurement circuit utilizes the built-in temperature measurement unit which is universal for the micro control unit to detect the temperature, no additional circuit or device is needed, the structure is simple, the cost is low, the micro control unit is strictly calibrated when leaving the factory, and the temperature is accurate and reliable.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a first schematic structural diagram of a temperature measurement circuit provided in the present application;
fig. 2 is a schematic structural diagram of a temperature measurement circuit according to the present application;
fig. 3 is a schematic structural diagram of a temperature measurement circuit according to the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
When two different conductors or semiconductors a and B form a loop, and the two ends of the loop are connected to each other, as long as the temperatures at the two connection points are different, one end is at T, called working end or hot end, and the other end is at T0, called free end (also called reference end) or cold end, an electromotive force is generated in the loop, and the direction and magnitude of the electromotive force are related to the materials of the conductors and the temperatures of the two connection points. This phenomenon is called thermoelectric effect, the loop formed by the two conductors is called thermocouple, and the electromotive force generated is called thermoelectric force.
The temperature measuring circuit provided by the application utilizes the thermoelectric effect of the thermocouple to measure the temperature, and the thermocouple has the advantages of wide measuring range, simple structure and the like, so that the temperature measuring circuit can be widely applied to various temperature measuring scenes. For example, the temperature measuring circuit of the present application may be applied to a household appliance, and the hot end of the thermocouple is disposed close to the object to be detected, so that the temperature of the object to be detected may be determined by using the corresponding relationship between the thermal electromotive force and the hot end temperature of the thermocouple. For example, the household appliance may be an induction cooker, an electric oven, an electric kettle, etc., and the temperature measuring circuit in the present application is utilized to measure a temperature of a pot, a temperature of an oven, etc., which is not limited in the present application.
Because the actual application scenario of the thermocouple is usually at room temperature or in a specific heating or cooling environment, the cold end temperature often changes and cannot be kept at 0 ℃, which results in an inaccurate temperature result directly determined according to the graduation table of the thermocouple, and therefore, when the thermocouple is used for temperature measurement, the cold end temperature usually needs to be compensated to improve the accuracy of the result.
In the related art, a cold end temperature compensation method is to use a thermocouple temperature compensation line, that is, to extend a thermocouple. The cold end is led to a place where the temperature is stable, and then the temperature of the cold end is adjusted manually, the zero point is adjusted to the room temperature, or the circuit is used for automatic compensation. The method of using the thermocouple temperature compensation line cannot automatically compensate the temperature change of the cold end of the thermocouple, only leads the cold end of the thermocouple to a place with stable temperature, and the compensation still needs manual adjustment or an additional circuit.
Another method is to use a Negative Temperature Coefficient (NTC) thermistor to measure the cold-end Temperature, which still needs Temperature calibration and uses an additional cold-end Temperature measurement circuit, resulting in higher cost.
In order to solve the problem, the cold junction and the micro control unit of thermocouple are connected to this application, and the temperature that the temperature measurement unit inside with the micro control unit detected is as the cold junction temperature of thermocouple to the realization is on the basis that does not increase circuit cost, realizes the cold junction temperature compensation of thermocouple. The temperature measurement circuit of the present application is described below with reference to specific embodiments.
Fig. 1 is a first schematic structural diagram of a temperature measurement circuit provided in the present application. As shown in fig. 1, the temperature measuring circuit includes: the temperature measuring device comprises a thermocouple 10, a signal amplifying circuit 20 and a Micro Control Unit (MCU) 30, wherein a temperature measuring Unit 301 is arranged in the micro control Unit 30.
The cold end of the thermocouple 10 is connected with the input end of the signal amplification circuit 20, and the output end of the signal amplification circuit 20 is connected with the micro control unit 30; the micro control unit 30 receives the voltage signal output by the signal amplifying circuit 20 and reads the temperature measurement result of the temperature measuring unit 301 to determine the hot end temperature of the thermocouple 10.
In this embodiment, the hot end of the thermocouple 10 is disposed near the object to be detected, and the cold end of the thermocouple 10 is disposed near the control circuit of the device where the object to be detected is located. For example, when the temperature measuring circuit is used for measuring the temperature of a pot, the hot end of the thermocouple 10 is arranged at a position close to the bottom or the side wall of the pot, and the cold end of the thermocouple 10 is arranged at a position of a control circuit of the pot.
When the thermocouple 10 is used for temperature measurement, after the thermocouple 10 converts the temperature signal into an electrical signal, the signal amplification circuit 20 is required to amplify the electrical signal output by the thermocouple 10, and then the micro control unit 30 processes the amplified electrical signal to obtain a detected temperature value. Therefore, in the present embodiment, the cold end of the thermocouple 10 is connected to the signal amplification circuit 20, and the signal amplification circuit 20 is connected to the micro control unit 30.
Since the micro control unit 30 does not generate heat or generates heat negligibly during operation, all the devices of the signal amplifying circuit 20 and the micro control unit 30 have the same or approximately the same temperature at the same time, and the temperature of the micro control unit 30 and the temperature of the cold end of the thermocouple 10 are the same or approximately the same. Therefore, the micro control unit 30 performs temperature detection through the temperature measuring unit 301 arranged therein to obtain a temperature value of the micro control unit 30, that is, the temperature value can be used as the cold end temperature of the thermocouple 10. Further, the micro control unit 30 may perform cold junction compensation according to the cold junction temperature of the thermocouple 10 to obtain an accurate hot junction temperature, i.e., a temperature of the object to be detected.
The processing of the micro control unit 30 is exemplified.
The graduation chart of the thermocouple 10 is the corresponding relationship between the thermoelectromotive force and the hot-side temperature when the cold-side temperature is 0 ℃, and when the cold-side temperature is not 0 ℃ in use, the thermoelectromotive force generated by the thermocouple 10 is as follows according to the middle temperature law of the thermocouple:
EAB(T,0)＝EAB(T,TH)+EAB(TH,0)
wherein EAB (T,0) is thermoelectromotive force when the temperature of the cold end is 0 and the temperature of the hot end is T; EAB (T, TH) is a measured value of the thermal electromotive force when the cold-end temperature is TH and the hot-end temperature is T, that is, the measured value of the thermal electromotive force determined according to the output signal of the signal amplifying circuit 20; EAB (TH,0) is the thermoelectromotive force when the cold end temperature is 0 and the hot end temperature is TH.
In an example, a copper-constantan thermocouple is used for detecting the temperature T of an object to be detected, the cold end is in a room temperature environment TH, the thermoelectric potential EAB (T, TH) is determined to be 1.999mV according to an output signal of the signal amplifying circuit 20, in addition, the temperature measuring unit 301 arranged in the micro control unit 30 is used for measuring the cold end temperature TH to be 21 ℃, and according to a graduation chart of the thermocouple, the EAB (21,0) is determined to be 0.832mV, so that:
EAB(T,0)＝EAB(T,21)+EAB(21,T0)＝2.831(mV)
the temperature T of the hot end corresponding to 2.831mV is determined to be 68 ℃ by looking up the score table again.
The temperature measurement circuit in this embodiment is connected the cold junction of thermocouple directly with signal amplification circuit and little the control unit for the cold junction temperature of the temperature of little the control unit and thermocouple keeps unanimous, thereby little the control unit can utilize the temperature value that built-in temperature measurement unit detected to carry out cold junction compensation as the cold junction temperature of thermocouple, thereby has improved temperature detection's accuracy. In addition, the temperature detection is carried out by utilizing the built-in temperature measurement unit which is universal to the micro control unit in the scheme, no additional circuit or device is needed, the structure is simple, and the cost is low. And the micro-control unit is subjected to strict calibration when leaving the factory, so that the temperature is accurate and reliable.
On the basis of the above-described embodiments, the arrangement of the temperature measurement circuit is further explained. Fig. 2 is a schematic structural diagram of a temperature measurement circuit according to the present application. As shown in fig. 2, the temperature measuring circuit includes: thermocouple 10, signal amplification circuit 20 and little the control unit 30, little the control unit 30 is inside to be provided with temperature measuring unit 301.
The signal amplification circuit 20 and the micro control unit 30 are disposed on the circuit board 100, and the micro control unit 30 is connected or soldered to the circuit board 100, for example.
The cold end of the thermocouple 10 is connected to the socket of the circuit board 100, and is connected to the input end of the signal amplification circuit 20 through the connection terminal 40, and the output end of the signal amplification circuit 20 is connected to the micro control unit 30.
The circuit board 100 is disposed in a closed space, that is, the signal amplification circuit 20, the micro control unit 30 and the cold end of the thermocouple 10 are in the same closed space, so that the device temperatures of the signal amplification circuit 20 and the micro control unit 30 are the same as or approximately the same as the temperature of the cold end of the thermocouple 10.
In this embodiment, the hot end of the thermocouple 10 is disposed near the object to be detected, and the cold end of the thermocouple 10 is connected to the socket of the circuit board 100, so as to be connected to the signal amplification circuit 20 and the micro control unit 30 on the circuit board 100 through the connection terminal 40. For example, when the temperature measuring circuit is used for measuring the temperature of a pot, the hot end of the thermocouple 10 is arranged at a position close to the bottom or the side wall of the pot, and the cold end of the thermocouple 10 is connected to a circuit board of the pot.
In this embodiment, the circuit board 100 is disposed in the enclosed space, and since the micro control unit 30 does not generate heat or generates heat negligibly during the operation process, the temperatures of all devices of the signal amplification circuit 20 and the micro control unit 30 in the enclosed space are the same or approximately the same as the temperature of the cold end of the thermocouple 10. Therefore, the micro control unit 30 performs temperature detection through the temperature measuring unit 301 arranged therein to obtain a temperature value of the micro control unit 30, that is, the temperature value can be used as the cold end temperature of the thermocouple 10. Further, the micro control unit 30 may perform cold junction compensation according to the cold junction temperature of the thermocouple 10 to obtain an accurate hot junction temperature, i.e., a temperature of the object to be detected.
The temperature measuring circuit in this embodiment sets up signal amplification circuit and little the control unit on the circuit board in the enclosure, passes through the socket and signal amplification circuit and little the control unit connection of circuit board with the cold junction of thermocouple for little the control unit keeps away from the hot junction of thermocouple, and can keep unanimous with the cold junction temperature of thermocouple, thereby little the control unit can utilize the temperature value that built-in temperature measurement unit detected to carry out cold junction compensation as the cold junction temperature of thermocouple, thereby the accuracy of temperature detection has been improved. In addition, the temperature detection is carried out by utilizing the built-in temperature measurement unit which is universal to the micro control unit in the scheme, no additional circuit or device is needed, the structure is simple, and the cost is low. And the micro-control unit is subjected to strict calibration when leaving the factory, so that the temperature is accurate and reliable.
Fig. 3 is a schematic structural diagram of a temperature measurement circuit according to the present application. As shown in fig. 3, the temperature measuring circuit includes: thermocouple 10, signal amplification circuit 20 and little the control unit 30, little the control unit 30 is inside to be provided with temperature measuring unit 301.
The signal amplification circuit 20 and the micro control unit 30 are disposed on the circuit board 100, and the micro control unit 30 is connected or soldered to the circuit board 100, and the micro control unit 30 is disposed on a side of the circuit board 100 away from the hot end of the thermocouple 10, as an example. The temperature measuring unit 301 is a temperature sensor.
Optionally, the circuit board 100 is disposed in the closed space, so that the signal amplification circuit 20 and the micro control unit 30 on the circuit board 100 are away from the object to be detected at the hot end of the thermocouple 10.
The cold end of the thermocouple 10 is connected to the socket of the circuit board 100, and is connected to the input end of the signal amplification circuit 20 through the connection terminal 40, and the output end of the signal amplification circuit 20 is connected to the analog-to-digital conversion port of the micro control unit 30.
In this embodiment, the hot end of the thermocouple 10 is disposed near the object to be detected, and the cold end of the thermocouple 10 is connected to the socket of the circuit board 100, so as to be connected to the signal amplification circuit 20 and the micro control unit 30 on the circuit board 100 through the connection terminal 40. For example, when the temperature measuring circuit is used for measuring the temperature of a pot, the hot end of the thermocouple 10 is arranged at a position close to the bottom or the side wall of the pot, and the cold end of the thermocouple 10 is connected to the circuit board 100 of the pot.
In this embodiment, the circuit board 100 is disposed in the enclosed space, and the current of the micro control unit 30 during operation is smaller than a preset value, which makes the temperature of the micro control unit 30 and the temperature of the cold end of the thermocouple 10 the same or approximately the same. Illustratively, the current of the micro-control unit 30 is in milliamps.
Since the current of the micro control unit 30 is smaller than the preset value during the operation, the micro control unit does not generate heat or generates heat negligibly during the operation, and therefore, the temperatures of all the devices of the signal amplification circuit 20 and the micro control unit 30 are the same or approximately the same as the temperature of the cold end of the thermocouple 10. Therefore, the micro control unit 30 performs temperature detection through the temperature measuring unit 301 arranged therein to obtain a temperature value of the micro control unit 30, that is, the temperature value can be used as the cold end temperature of the thermocouple 10. Further, the micro control unit 30 may perform cold junction compensation according to the cold junction temperature of the thermocouple 10 to obtain an accurate hot junction temperature, i.e., a temperature of the object to be detected.
Temperature measurement circuit in this embodiment, set up signal amplification circuit and little the control unit on the circuit board in the enclosure, the socket that passes through the circuit board with the cold junction of thermocouple is connected with signal amplification circuit and little the control unit, and little the control unit sets up the one side of keeping away from the hot junction of thermocouple on the circuit board, make little the control unit's temperature can keep unanimous with the cold junction temperature of thermocouple, thereby little the control unit can utilize the temperature value that built-in temperature measurement unit detected to carry out cold junction compensation as the cold junction temperature of thermocouple, thereby temperature detection's accuracy has been improved. In addition, the temperature detection is carried out by utilizing the built-in temperature measurement unit which is universal to the micro control unit in the scheme, no additional circuit or device is needed, the structure is simple, and the cost is low. And the micro-control unit is subjected to strict calibration when leaving the factory, so that the temperature is accurate and reliable.
The present application provides a domestic appliance comprising a temperature measurement circuit as in any of the embodiments above.
The example, this domestic appliance can be electromagnetism stove, electric rice cooker, electric oven, insulating pot etc. and this domestic appliance utilizes the temperature measurement circuit in this application to measure pan temperature, oven temperature etc. and its theory of realization and technological effect are similar, and it is no longer repeated here.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the embodiments of the present application.
In the present application, the terms "include" and variations thereof may refer to non-limiting inclusions; the term "or" and variations thereof may mean "and/or". The terms "first," "second," and the like in this application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. In the present application, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Claims (10)
1. A temperature measurement circuit, comprising: the temperature measuring device comprises a thermocouple, a signal amplifying circuit and a micro control unit, wherein a temperature measuring unit is arranged in the micro control unit;
the cold end of the thermocouple is connected with the input end of the signal amplification circuit, and the output end of the signal amplification circuit is connected with the micro control unit; and the micro control unit receives the voltage signal output by the signal amplification circuit and the temperature measurement result of the temperature measurement unit so as to determine the hot end temperature of the thermocouple.
2. The temperature measurement circuit of claim 1, wherein the signal amplification circuit and the micro control unit are disposed on a circuit board.
3. The temperature measurement circuit of claim 2, wherein the circuit board is disposed in a closed space.
4. The temperature measurement circuit of claim 3, wherein the cold end of the thermocouple is connected to a socket of the circuit board to connect with the input of the signal amplification circuit through a connection terminal.
5. The temperature measurement circuit of claim 4, wherein the micro control unit is disposed on a side of the circuit board away from the hot end of the thermocouple.
6. The temperature measurement circuit according to any one of claims 1-5, wherein an output of the signal amplification circuit is connected to an analog-to-digital conversion port of the micro control unit.
7. The temperature measurement circuit according to any one of claims 1 to 5, wherein the temperature measurement unit is a temperature sensor.
8. The temperature measurement circuit of any of claims 1-5, wherein the current of the micro control unit is less than a preset value, the preset value being such that the temperature of the micro control unit and the cold end temperature of the thermocouple are the same or approximately the same.
9. The temperature measurement circuit of claim 8, wherein the current of the micro-control unit is in the milliamp range.
10. A household appliance, characterized in that it comprises: a temperature measurement circuit according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021743985.4U CN212621163U (en) | 2020-08-19 | 2020-08-19 | Temperature measuring circuit and household appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021743985.4U CN212621163U (en) | 2020-08-19 | 2020-08-19 | Temperature measuring circuit and household appliance |
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| CN212621163U true CN212621163U (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021743985.4U Active CN212621163U (en) | 2020-08-19 | 2020-08-19 | Temperature measuring circuit and household appliance |
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| CN (1) | CN212621163U (en) |
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