阅读说明：本技术 一种限温器通断检测装置及方法 (On-off detection device and method for temperature limiter ) 是由 任婷 杨少雄 肖浩 赵晓博 李超 杨�嘉 于 2021-08-05 设计创作，主要内容包括：本发明公开了一种限温器通断检测装置及方法,其中所述装置包括支撑板,支撑板上设有发热件,发热件上安装有用于对待测限温器进行固定的夹具,待测限温器与发热件直接接触,以对待测限温器加热；散热组件设置于发热件一侧的支撑板,以向待测限温器喷出气体,对待测限温器降温。本发明提供的一种限温器通断检测装置及方法,发热件和散热组件用于提供待测限温器的所需温度,散热组件利用压缩空气对待测限温器进行冷却,从而完成限温器的通断动作,提高降温效率且安全可靠、扩展检测装置的应用范围。(The invention discloses a device and a method for detecting the on-off state of a temperature limiter, wherein the device comprises a support plate, a heating element is arranged on the support plate, a clamp for fixing the temperature limiter to be detected is arranged on the heating element, and the temperature limiter to be detected is directly contacted with the heating element so as to heat the temperature limiter to be detected; the heat dissipation assembly is arranged on the supporting plate on one side of the heating piece to spray gas to the temperature limiter to be tested to cool the temperature limiter to be tested. According to the on-off detection device and method for the temperature limiter, the heating element and the heat dissipation assembly are used for providing the temperature required by the temperature limiter to be detected, and the heat dissipation assembly cools the temperature limiter to be detected by utilizing compressed air, so that the on-off action of the temperature limiter is completed, the cooling efficiency is improved, safety and reliability are realized, and the application range of the detection device is expanded.)

1. A temperature limiter on-off detection device is characterized by comprising a support plate, wherein a heating part is arranged on the support plate, a clamp used for fixing a temperature limiter to be detected is arranged on the heating part, and the temperature limiter to be detected is directly contacted with the heating part so as to heat the temperature limiter to be detected; the heat dissipation assembly is arranged on the supporting plate on one side of the heating piece to spray gas to the temperature limiter to be tested to cool the temperature limiter to be tested.

2. The on-off detection device for the temperature limiter according to claim 1, wherein the heat dissipation assembly comprises an air pipe, one end of the air pipe is close to the contact of the temperature limiter to be detected, the other end of the air pipe is connected with an air source, a switch valve is arranged on the air pipe, and the switch valve is electrically connected with the controller.

3. The on-off detection device for the temperature limiter of claim 1, wherein the heating member comprises a heating plate and a plurality of heating coils, the heating coils are arranged below the heating plate, and the plurality of heating coils are arranged in concentric circles.

4. The on-off detection device for the temperature limiter of claim 1, wherein the temperature limiter to be tested is connected with a power module, and the power module supplies current to the temperature limiter to be tested.

5. The on-off detection device for the temperature limiter of claim 4, further comprising a controller, wherein the power module, the heating element and the heat dissipation assembly are electrically connected with the controller respectively, and the controller controls the working states of the power module, the heating element and the heat dissipation assembly and collects a real-time temperature value and/or an electric parameter value of the temperature limiter to be measured.

6. The on-off detection device for the temperature limiter of claim 5, wherein the support plate is provided with a plurality of test stations and connecting terminals, and the temperature limiter to be tested is connected with the power module through the connecting terminals.

7. The on-off detection device for the temperature limiter of claim 5, wherein the controller comprises a touch screen, a PLC control unit and a temperature detection unit, wherein,

the touch screen is used for displaying data and/or inputting instructions;

the PLC control unit is used for controlling the working states of the heating element, the heat dissipation assembly and the power supply module;

the temperature detection unit is used for collecting the temperature of the temperature limiter to be detected.

8. The on-off detection device for the temperature limiter according to claim 1, further comprising a detection box, wherein a detection cavity is arranged in the detection box, the supporting plate is arranged in the detection cavity, an exhaust fan is arranged on the side wall of the detection cavity, and a heat dissipation port is arranged on the side wall of the detection box.

9. A method for detecting the on-off state of a temperature limiter is characterized by comprising the following steps:

acquiring a preset disconnection temperature interval and a preset conduction temperature interval, and the real-time disconnection temperature and the real-time conduction temperature of the temperature limiter to be measured;

judging whether the real-time off temperature is in an off temperature interval or not, or whether the real-time on temperature is in an on temperature interval or not;

and if the real-time disconnection temperature is not in the disconnection temperature interval or the real-time conduction temperature is not in the conduction temperature interval, judging that the on-off test is finished and the temperature limiter to be tested is unqualified.

10. The method of claim 9, wherein if the real-time off temperature is in an off temperature interval and the real-time on temperature is in an on temperature interval, the method further comprises:

acquiring the real-time times of the life test;

judging whether the real-time times of the life test reach the preset test times or not;

and if the real-time times of the service life test reach the preset test times, judging that the on-off test is finished and the temperature limiter to be tested is qualified.

Technical Field

The invention belongs to the technical field of air conditioner component detection, and particularly relates to a device and a method for detecting on-off of a temperature limiter.

Background

The temperature limiter is a temperature sensitive controller, mainly comprising a temperature sensing part and a contact, wherein in a normal state, the contact is closed, and a corresponding circuit is conducted and works normally; when the temperature sensed by the temperature limiter exceeds a preset range (is lower than or higher than a certain specific temperature), the contact is disconnected, so that a corresponding circuit is disconnected; when the temperature returns to be within the set range, the contacts are closed again, and the corresponding circuit is closed again. Therefore, the temperature limiter plays a role in protecting equipment within a preset temperature range.

The air conditioner motor, the compressor and the electric heating component all generate heat during the strong electricity period. When the working states of the motor, the compressor and the electric heating component are abnormal, abnormal heat is generated, so that when the surface temperatures of the motor, the compressor and the electric heating component exceed the temperature value of normal working, the temperature limiters of the motor, the compressor and the electric heating component can cut off the power supply, and the motor, the compressor and the electric heating component stop working, so that the motor, the compressor and the electric heating component are prevented from generating thermal deformation, combustion and the like, and the safety of the whole machine product is prevented from being influenced. Therefore, the reliability of the service life of the motor, the compressor and the temperature limiter of the electric heating part directly influences the safety of the whole machine product.

In order to detect the quality of the temperature limiter, the traditional inspection mode is as follows: the on-off condition of the temperature limiter is detected manually by using a high-temperature box, a temperature point instrument, a universal meter and the like together, however, according to the standard requirement, the on-off times of the temperature limiter is not less than 4000 times, so that the requirement cannot be met by manual inspection, the inspection efficiency is low, and the accuracy of the detected data is not sufficient.

In order to realize automatic detection, when the service life of the temperature limiter is tested in the prior art, the temperature limiter to be tested is heated by blowing hot air by electric blower, and the heating is stopped when the contact of the temperature limiter to be tested is disconnected; and when the temperature limiter to be tested is cooled until the contact is closed again, starting the electric blowing hot air to heat the temperature limiter to be tested again, and repeating the steps in such a way, so as to test the service life of the temperature limiter by recording the times of opening or closing the contact of the temperature limiter to be tested. However, the prior art that uses a hair dryer to test the service life of the temperature limiter has at least the following defects: (1) the existing test tool is carried out in an open environment, the opening and closing time of a contact of the temperature limiter is greatly influenced by the ambient temperature, the airflow size, the distance between an air outlet of the electric hair drier and the temperature limiter to be tested and the like, so that the test result of the service life of the temperature limiter to be tested is unstable; (2) the existing test tool cannot simulate the circuit environment of the temperature limiter in actual use, and the contact of the temperature limiter to be detected can only be mechanically opened or closed, so that a test result has a large error with the service life of the temperature limiter in actual application.

Disclosure of Invention

In order to solve the technical problems mentioned in the background art, the invention provides the on-off detection device and the on-off detection method for the temperature limiter, which are used for solving the technical problems that the performance test of the existing temperature limiter cannot meet the standard and has large errors.

In order to achieve the purpose, the specific technical scheme of the on-off detection device and the method for the temperature limiter is as follows:

a temperature limiter on-off detection device comprises a supporting plate, wherein a heating part is arranged on the supporting plate, a clamp used for fixing a temperature limiter to be detected is arranged on the heating part, and the temperature limiter to be detected is in direct contact with the heating part so as to heat the temperature limiter to be detected; the heat dissipation assembly is arranged on the supporting plate on one side of the heating piece to spray gas to the temperature limiter to be tested to cool the temperature limiter to be tested.

Further, the heat dissipation assembly comprises a gas pipe, one end of the gas pipe is close to the contact of the temperature limiter to be measured, the other end of the gas pipe is connected with a gas source, and a switch valve is arranged on the gas pipe and electrically connected with the controller.

Further, the heating element comprises a heating plate and a plurality of heating coils, the heating coils are arranged below the heating plate, and the heating coils are distributed in concentric circles.

Furthermore, the temperature limiter to be tested is connected with a power module, and the power module provides current for the temperature limiter to be tested.

The controller controls the working states of the power module, the heating part and the heat dissipation assembly and collects real-time temperature values and/or electric parameter values of the temperature limiter to be measured.

Furthermore, a plurality of testing stations and wiring terminals are arranged on the supporting plate, and the temperature limiter to be tested is connected with the power supply module through the wiring terminals.

Further, the controller comprises a touch screen, a PLC control unit and a temperature detection unit, wherein,

the touch screen is used for displaying data and/or inputting instructions;

the PLC control unit is used for controlling the working states of the heating element, the heat dissipation assembly and the power supply module;

the temperature detection unit is used for collecting the temperature of the temperature limiter to be detected.

Further, the device still includes the detection case, is equipped with the detection chamber in the detection case, and the backup pad is arranged in and is detected the intracavity, is equipped with the exhaust fan on the lateral wall in detection chamber, is equipped with the thermovent on the lateral wall of detection case.

A method for detecting on-off of a temperature limiter comprises the following steps:

acquiring a preset disconnection temperature interval and a preset conduction temperature interval, and the real-time disconnection temperature and the real-time conduction temperature of the temperature limiter to be measured;

judging whether the real-time off temperature is in an off temperature interval or not, or whether the real-time on temperature is in an on temperature interval or not;

and if the real-time disconnection temperature is not in the disconnection temperature interval or the real-time conduction temperature is not in the conduction temperature interval, judging that the on-off test is finished and the temperature limiter to be tested is unqualified.

Further, if the real-time off temperature is in the off temperature interval and the real-time on temperature is in the on temperature interval, the method further includes:

acquiring the real-time times of the life test;

judging whether the real-time times of the life test reach the preset test times or not;

and if the real-time times of the service life test reach the preset test times, judging that the on-off test is finished and the temperature limiter to be tested is qualified.

The on-off detection device and the method for the temperature limiter have the following advantages: according to the on-off detection device and the on-off detection method for the temperature limiter, the heating element and the heat dissipation assembly are arranged, the heating element and the heat dissipation assembly are used for providing the temperature required by the temperature limiter to be detected, and the heat dissipation assembly cools the temperature limiter to be detected by using compressed air, so that the on-off action of the temperature limiter is completed, the cooling efficiency is improved, the safety and the reliability are realized, and the application range of the detection device is expanded, such as service life test and action temperature characteristic detection.

Drawings

FIG. 1 is a perspective view of the on-off detection device of the temperature limiter of the present invention;

FIG. 2 is a front view of the thermostat on-off detection device of the present invention;

FIG. 3 is a schematic diagram of the internal structure of the on-off detection device of the temperature limiter of the present invention;

FIG. 4 is a control flow chart of the method for detecting the on-off state of the temperature limiter according to the present invention.

The notation in the figure is:

1. a detection box; 11. an exhaust fan; 12. a heat dissipation port; 2. a support plate; 3. a heat generating member; 4. a heat dissipating component; 5. a wiring terminal; 6. a clamp; 7. a touch screen; 8. and a control button.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-3, the on-off detection device for the temperature limiter comprises a support plate 2, a heating element 3 is arranged on the support plate 2, and a clamp 6 for fixing the temperature limiter to be tested is arranged on the heating element 3, so that the temperature limiter to be tested is directly contacted with the heating element 3 to heat the temperature limiter to be tested; the heat dissipation component 4 is arranged on the supporting plate 2 on one side of the heating component 3 to spray gas to the temperature limiter to be measured so as to cool the temperature limiter to be measured.

Specifically, the heat dissipation assembly 4 comprises a gas pipe, one end of the gas pipe is close to a contact of the temperature limiter to be measured, the other end of the gas pipe is connected with a gas source, a switch valve is arranged on the gas pipe and electrically connected with the controller, and a flow meter is further arranged on the gas pipe. When the controller detects that the temperature limiter to be tested is disconnected, the controller controls the switch valve to be opened so as to spray low-temperature air to the temperature limiter to be tested and cool the temperature limiter to be tested; and when the contact of the temperature limiter to be tested is detected to be closed again, the switch valve is controlled to be closed, and the heating piece 3 is controlled to be opened to enter the next test cycle.

In order to form surface heating to the temperature limiter to be measured, the heating part 3 comprises a heating plate and a plurality of circles of heating coils, the heating coils are arranged below the heating plate, the plurality of circles of heating coils are distributed in a concentric circle mode, the bottom surface of the temperature limiter to be measured is integrally contacted with the heating part 3, the contact area between the bottom surface of the temperature limiter to be measured and the heating part is large, and the temperature limiter to be measured is heated more uniformly.

Furthermore, the temperature limiter to be tested is connected with a power module, and the power module provides current for the temperature limiter to be tested. In the detection process, the temperature limiter to be detected is connected to an electric hot plate or other load circuits so as to apply certain rated voltage to the temperature limiter to be detected, wherein the maximum working current deviation flowing through the temperature limiter to be detected is +/-5 percent, so that the temperature of the temperature limiter to be detected is increased and reduced, and the opening and closing test of a contact is carried out.

In this embodiment, be equipped with a plurality of test station and binding post 5 on the backup pad 2, the limit for temperature ware that awaits measuring passes through binding post 5 and is connected with power module.

In this embodiment, the device further comprises a controller, the power module, the heating element 3 and the heat dissipation assembly 4 are respectively electrically connected with the controller, on one hand, the controller controls the power module, the heating element 3 and the heat dissipation assembly 4 to work, and on the other hand, the controller collects a real-time temperature value and/or an electric parameter value of the temperature limiter to be measured. The temperature limiter to be tested is switched between a conducting state and a disconnecting state according to the using condition of the temperature limiter to be tested, wherein the real-time temperature when the two states are switched is the real-time disconnecting temperature and the real-time conducting temperature respectively, and when the real-time disconnecting temperature is in a disconnecting temperature interval and the real-time conducting temperature is in a conducting temperature interval, the temperature limiter to be tested is qualified; and when the real-time disconnection temperature is not in the disconnection temperature interval or the real-time conduction temperature is not in the conduction temperature interval, judging that the temperature limiter to be measured is unqualified.

Further, the controller comprises a touch screen 7, a PLC control unit and a temperature detection unit, wherein,

the touch screen 7 is used for displaying data and/or inputting instructions; the off-temperature interval and the on-temperature interval of the temperature limiter to be measured are set through the touch screen 7, and temperature curves and the like of each stage are displayed.

The PLC control unit is used for controlling the working states of the heating element 3, the heat dissipation assembly 4 and the power supply module;

the temperature detection unit is used for collecting the temperature of the temperature limiter to be detected;

the current acquisition unit is used for acquiring the current of a loop where the temperature limiter to be detected is located so as to judge the connection and disconnection of the temperature limiter to be detected.

Further, the device still includes detection case 1, is equipped with in the detection case 1 and detects the chamber, and backup pad 2 is arranged in and is detected the intracavity, is equipped with exhaust fan 11 on the lateral wall in detection chamber, is equipped with thermovent 12 on the lateral wall of detection case 1.

The detection box 1 is also provided with a control button, and the control button comprises a button for controlling the on-off of each test station and a power control button.

The temperature limiter on-off detection device that this embodiment provided sets up and generates heat 3 and radiator unit 4, and the piece 3 that generates heat and radiator unit 4 are used for providing the required temperature of the temperature limiter that awaits measuring, and radiator unit 4 utilizes compressed air to cool off the temperature limiter that awaits measuring to accomplish the on-off action of temperature limiter, improve cooling efficiency and safe and reliable, extension detection device's range of application, if life-span test, action temperature characteristic detect.

As shown in fig. 4, the present application also provides a method for detecting on/off of a temperature limiter, comprising:

acquiring a preset disconnection temperature interval and a preset conduction temperature interval, and the real-time disconnection temperature and the real-time conduction temperature of the temperature limiter to be measured;

judging whether the real-time off temperature is in an off temperature interval or not, or whether the real-time on temperature is in an on temperature interval or not;

and if the real-time disconnection temperature is not in the disconnection temperature interval or the real-time conduction temperature is not in the conduction temperature interval, judging that the on-off test is finished and the temperature limiter to be tested is unqualified.

Further, if the real-time off temperature is in the off temperature interval and the real-time on temperature is in the on temperature interval, the method further includes:

acquiring the real-time times of the life test;

judging whether the real-time times of the life test reach the preset test times or not;

and if the real-time times of the service life test reach the preset test times, judging that the on-off test is finished and the temperature limiter to be tested is qualified.

The method can be used for detecting the action temperature characteristic of the temperature limiter to be detected, and comprises the following steps:

during testing, the temperature limiter to be tested is clamped on the clamp 6, the limiter to be tested is arranged above the heating part 3, and the support plate 2 is arranged in the detection cavity. And setting an off temperature interval and an on temperature interval of the temperature limiter to be detected through the touch screen 7, and starting the equipment to start detection. The controller controls the heating part 3 to heat the temperature limiter to be tested, when the temperature limiter is lower than the left end point of a disconnection temperature interval by 10K, the controller controls the heating power of the heating part 3 in real time to enable the temperature limiter to be tested to be heated at the rate of 1K/min, and when the temperature limiter to be tested is detected to be in a disconnection state, the real-time temperature of the temperature limiter to be tested is recorded, namely the real-time disconnection temperature; and then, controlling the heating element 3 to be closed, controlling the heat dissipation component 4 to be opened, when the temperature is higher than the right end point of the conduction temperature interval by 10K, enabling the temperature limiter to be tested to be cooled at the rate of 1K/min by the controller through adjusting the flow of the heat dissipation component 4, recording the real-time temperature of the temperature limiter to be tested when the temperature limiter to be tested is detected to be in a conduction state, namely the real-time conduction temperature, wherein the temperature rise and the temperature reduction are recorded as a primary cycle, 4 cycles are included in the action temperature characteristic detection process, and the maximum current value of the temperature limiter to be tested is not more than 10mA in the read-through detection process.

In addition, the method can also be used for detecting the service life of the temperature limiter to be detected, and the specific method comprises the following steps:

the temperature limiter to be tested is connected to an electric heating plate or a similar load circuit, rated voltage is applied, the maximum working current (deviation is +/-5 percent), the temperature limiter is heated and cooled to carry out contact opening and closing tests, the on-off period is not less than 10s (namely the maximum frequency is 6 times/min), the closing time is more than 1s, the action frequency of the temperature limiter is recorded by a counter when the temperature limiter is opened and closed once, the preset service life frequency is set at the initial stage of the test through a touch screen 7, and the short circuit between electrodes and the short circuit on a live part caused by electric arcs cannot occur during the test.

Those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.