Testing equipment and water heater

Abstract

This application relates to a testing device and a water heater. The testing device includes: a resistance detection component, which is elongated and has multiple detection points spaced apart; and a switching mechanism configured to selectively connect with two of the multiple detection points to form a detection loop. The water heater includes the testing device. The testing device, through the switching mechanism and the resistance detection component, measures the temperature of different areas of the object under test, improving the flexibility and convenience of temperature measurement. It can meet the need for real-time and accurate temperature detection of different parts of the object under test, and can reduce the number of detection interfaces on the control board.

Description

Technical Field

[0001] This application relates to the field of testing equipment technology, and in particular to testing devices and water heaters. Background Technology

[0002] In numerous scenarios across industrial production, scientific research, and daily life, the detection of parameters such as temperature, humidity, and pressure is crucial. Sensors, as key devices for detecting these parameters, are widely used in various environments. To improve accuracy, multiple sensors are typically used for multi-point detection to provide data on temperature, humidity, and pressure. However, in actual testing, multiple sensors performing multi-point detection require multiple detection interfaces on the control board, with each sensor connected to one of these interfaces via signal lines. Utility Model Content

[0003] The first technical problem solved by this invention is to provide a testing device that reduces the number of testing interfaces on the control board.

[0004] The second technical problem solved by this utility model is to provide a water heater that can reduce the detection connections of the control board.

[0005] The first technical problem mentioned above is solved by the following technical solution: a testing device, the testing device comprising: a resistance detection component, which is elongated and used to be placed on the object to be tested, the resistance detection component having a plurality of detection points spaced apart; a switching mechanism for connecting to a control board, the switching mechanism being configured to selectively connect to two of the plurality of detection points to form a detection loop.

[0006] The testing device described in this utility model has the following advantages compared with the prior art: When it is necessary to measure different areas of the object to be tested, the switching mechanism is used to switch and connect with two corresponding detection points to form a corresponding detection loop; thus, the detection data of different areas are completed by switching. It can be understood that during the switching detection process, the control board only needs to set one detection interface to receive detection data, and does not need to set the same number of detection interfaces as the detection points, thereby reducing the number of interfaces on the control board.

[0007] In one embodiment, the switching mechanism includes: at least one switching electrode; and a driving mechanism for driving the switching electrode to move so that the switching electrode can contact different detection points.

[0008] In one embodiment, the testing device further includes an insulating guide mechanism having a guide groove, through which the switching electrode is slidably connected. The insulating guide mechanism allows the switching electrode to be easily and quickly connected to different detection points, simplifying the measurement operation and improving measurement efficiency and flexibility.

[0009] In one embodiment, the resistive detection component is provided with a plurality of detection electrodes at intervals, the detection electrodes serving as detection points, the detection electrodes extending into the guide groove, and the driving mechanism driving the switching electrode to slide within the guide groove, so that the switching electrode can contact different detection electrodes.

[0010] In one embodiment, the insulating guiding mechanism includes: a guiding component forming the guiding groove; a connecting component; the connecting component being connected to the guiding component and protruding into the guiding groove, the connecting component having a connecting through hole; and the detection electrode passing through the connecting through hole and extending into the guiding groove. Thus, when the switching mechanism slides within the guiding groove, it can stably contact the detection electrode, ensuring stable installation of the switching mechanism within the guiding groove. Simultaneously, it provides a reliable contact method for the connection between the switching mechanism and the detection electrode, ensuring stable connection of the detection circuit during measurement and improving measurement accuracy.

[0011] In one embodiment, the guide component includes: a first sidewall connected to the connecting component; a second sidewall connected to the first sidewall; and a third sidewall connected to the side of the second sidewall away from the first sidewall. The third sidewall is disposed opposite to the first sidewall, and the third sidewall, the first sidewall, and the second sidewall together form the guide groove. An opening is formed between the third sidewall and the first sidewall. The guide groove structure formed by the first, second, and third sidewalls is stable, providing a stable sliding space for the switching mechanism, facilitating smooth sliding of the switching mechanism within the guide groove.

[0012] In one embodiment, the switching mechanism further includes: a first wire electrically connected to one of the switching electrodes; and a second wire electrically connected to another of the switching electrodes or to the detection electrode. This switching mechanism can be used to quickly connect and form a detection loop for efficiently measuring the resistance values ​​of resistive detection components at different locations, thereby obtaining the corresponding parameters.

[0013] In one embodiment, the switching electrode includes: an electrode body slidably connected to the insulating guide mechanism via the guide groove; the electrode body having a conductive groove, the inner wall of which has a conductive surface for contacting and conducting electricity with the detection electrode; and a terminal block embedded in the electrode body and electrically connected to the conductive surface, the terminal block being configured to connect to the first wire or the second wire. The electrode body can slide back and forth along the guide groove between the detection electrodes, thereby flexibly adjusting the position of the electrode body, and forming a detection circuit through the conductive surface and the terminal block.

[0014] In one embodiment, the number of switching electrodes is two, with each switching electrode connected to the first lead and the second lead, respectively; or the number of switching electrodes is one, with the first lead configured to connect to a corresponding detection electrode via the switching electrode, and the second lead configured to connect directly to the other detection electrode. Thus, the number of switching electrodes can be flexibly set, providing more options for different application scenarios and measurement needs, thereby increasing the applicability and flexibility of the testing device.

[0015] The second technical problem mentioned above is solved by the following technical solution: a water heater, including an inner tank, wherein the outer wall of the inner tank is provided with a testing device as described in any of the above.

[0016] The water heater described in this utility model has the following advantages compared with the prior art: Based on the structural design of the testing device, the testing device can flexibly detect the corresponding parameters of different parts of the inner tank, which can reduce the number of detection interfaces on the control board. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the test device in the embodiments of this application.

[0018] Figure 2 This is a schematic diagram of the connection structure between the test device and the test object in the embodiments of this application.

[0019] Figure 3 This is a schematic cross-sectional view of the resistive detection component in the embodiments of this application.

[0020] Figure 4 yes Figure 1 A magnified view of a portion of the image.

[0021] Figure 5 This is a schematic diagram of the connection structure between the insulating guide mechanism and the detection mechanism in the embodiments of this application.

[0022] Figure 6 This is a schematic diagram of the connection structure between the insulation guiding mechanism, the detection mechanism, and the switching mechanism in the embodiments of this application.

[0023] Figure 7 This is a schematic diagram of the overall structure of the switching electrode in the embodiments of this application.

[0024] Figure 8 This is a front view schematic diagram of the switching electrode in the embodiments of this application.

[0025] Figure 9 This is a schematic diagram of the structure of a test device with two switching electrodes in an embodiment of this application.

[0026] Figure 10 This is a schematic diagram of the structure of a test device with a switching electrode in an embodiment of this application.

[0027] Figure 11 This is a schematic diagram of a test device with a switching electrode in another embodiment of this application.

[0028] Figure 12 This is a partial structural schematic diagram of the test device in the embodiments of this application.

[0029] Icon labels:

[0030] 10. Testing device; 110. Resistance detection component; 111. Detection core; 112. Insulating layer; 120. Detection electrode; 200. Switching mechanism; 210. Switching electrode; 211. Electrode body; 211a. Conductive groove; 211b. Conductive surface; 212. Terminal; 220. First wire; 230. Second wire; 300. Insulation guiding mechanism; 310. Guiding component; 311. First sidewall; 312. Second sidewall; 313. Third sidewall; 314. Guide groove; 320. Connecting component; 321. Connecting through hole; 20. Test object. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0037] See Figure 1 and Figure 2 The diagram shows a schematic representation of the testing device 10 in this embodiment. The testing device 10 provided in this embodiment includes a resistive detection component 110 and a switching mechanism 200. The resistive detection component 110 is elongated and has multiple detection points spaced apart. The switching mechanism 200 is connected to a control board and is configured to selectively connect to two of the multiple detection points to form a detection loop. The resistive detection component 110 can be a resistive sensor, which converts non-electrical physical quantities such as temperature, humidity, displacement, force, pressure, acceleration, and torque into changes in resistance, achieving measurement by sensing changes in its own resistance. Therefore, the testing device 10 can flexibly detect data such as temperature, humidity, and pressure at different parts of the object under test 20. It is understood that the change in resistance is obtained by detecting changes in the current in the detection loop.

[0038] For ease of understanding, the following embodiments use the testing device 10 to measure the temperature of the object 20 under test as an example, and the resistive detection component 110 is a thermistor sensor. Exemplarily, the object 20 under test can be a can-shaped structure containing liquid. The resistive detection component 110 is disposed on the outer wall of the can-shaped structure. The testing device 10 can flexibly detect the liquid temperature in different areas within the can-shaped structure, thereby comprehensively and accurately reflecting the temperature distribution of all liquids within the can-shaped structure.

[0039] Furthermore, in some embodiments, the switching mechanism 200 includes at least one switching electrode 210 and a driving mechanism (not shown in the figure). The driving mechanism is used to drive the switching electrode 210 to move, so that the switching electrode 210 can contact different detection points. Exemplarily, the driving mechanism can adopt a driving method such as motor and lead screw drive, motor and drive wheel drive, or motor and traction rope drive. By driving the switching electrode 210 to move relative to the resistive detection component 110, the position of the switching electrode 210 can be flexibly and efficiently adjusted so that the switching electrode 210 connects with the detection point to form a detection circuit, thereby accurately detecting the temperature.

[0040] See Figure 4 and Figure 5 As shown, in some embodiments, the testing device 10 further includes an insulating guide mechanism 300, which has a guide groove 314. The switching electrode 210 is slidably connected to the insulating guide mechanism 300 through the guide groove 314. The switching electrode 210 is configured to slide within the guide groove 314 under the driving action of the driving mechanism, so that the switching electrode 210 can be connected with different detection electrodes 120 to form a detection circuit. By pushing the switching electrode 210 to slide within the guide groove 314, it can be connected with different detection electrodes 120 to form a detection circuit, so as to measure the temperature of different regions of the test object 20. The insulating guide mechanism 300 allows the switching electrode 210 to be easily and quickly connected with different detection electrodes 120, simplifying operation, improving the efficiency and flexibility of temperature measurement, and facilitating comprehensive detection of the temperature distribution of the test object 20.

[0041] Further, in some embodiments, the resistive detection component 110 is provided with a plurality of detection electrodes 120 at intervals, and the detection electrodes 120 serve as detection points. The detection electrodes 120 extend into the guide groove 314, and the insulating guide mechanism 300 is connected to all the detection electrodes 120 to fix all the detection electrodes 120. The driving mechanism drives the switching electrode 210 to slide within the guide groove 314, so that the switching electrode 210 can contact different detection electrodes 120. The resistive detection component 110 is configured to exchange heat with the test object 20, and the resistance value of the resistive detection component 110 changes with the temperature of the resistive detection component 110. The plurality of detection electrodes 120 are respectively connected to different parts of the resistive detection component 110. Exemplarily, the resistive detection component 110 is configured to contact the outer surface of the test object 20 for heat exchange. The detection electrodes 120 can be metal electrodes, and the plurality of detection electrodes 120 are evenly arranged on the resistive detection component 110.

[0042] The switching mechanism 200 is configured to connect with two of the plurality of detection electrodes 120, thereby enabling the switching mechanism 200 to conduct with the resistive detection component 110 located between the two detection electrodes 120 and forming a detection circuit. The switching mechanism 200 is configured to measure the resistance value of the resistive detection component 110 located within the detection circuit, that is, the resistance value of the resistive detection component 110 between the two detection electrodes 120. Based on the correspondence between the resistance value of the resistive detection component 110 and temperature, the temperature of the resistive detection component 110 can be calculated, thereby obtaining the temperature of the test object 20 that exchanges heat with the resistive detection component 110, and thus obtaining the temperature of the test object 20 corresponding to the resistive detection component 110 between the two detection electrodes 120.

[0043] With the above structural design, when it is necessary to measure the temperature of a specific area of ​​the object 20, it is only necessary to connect the switching mechanism 200 to the two detection electrodes 120 located in the specific area, so that the switching mechanism 200 and the resistive detection component 110 between the two detection electrodes 120 form a detection loop. By measuring the resistance value of the resistive detection component 110 in the detection loop through the switching mechanism 200, the temperature of the specific area of ​​the object 20 corresponding to the resistive detection component 110 between the two detection electrodes 120 can be obtained according to the correspondence between the resistance value and the temperature. Thus, by connecting the switching mechanism 200 to different detection electrodes 120 on the resistive detection component 110 to form different detection loops, the temperature of different areas of the object 20 can be measured by the switching mechanism 200 and the resistive detection component 110, improving the flexibility and convenience of temperature measurement, and meeting the need for real-time and accurate detection of the temperature of different parts of the object 20. Furthermore, since the testing device 10 can select different combinations of detection electrodes 120 for measurement according to actual needs, it can flexibly detect the temperature of different areas of the test object 20. This can more comprehensively and accurately reflect the temperature distribution of different areas of the test object 20, thereby more accurately reflecting the overall temperature of the test object 20 and providing a reliable basis for temperature test data. Therefore, the testing device 10 of this application embodiment can flexibly detect the temperature of different areas of the test object 20 according to needs, and is also suitable for measuring the overall temperature of the test object 20, showing good application prospects in the field of precise temperature control such as electric water heaters.

[0044] See Figure 3 As shown, in some embodiments, the resistive detection component 110 includes a detection core 111 and an insulating layer 112. The detection core 111 is connected to the detection electrode 120 and is made of a thermistor material configured such that its resistance changes linearly with temperature. Because the resistance of the thermistor material exhibits a good linear relationship with temperature, when the resistive detection component 110 is mounted outside the object to be measured 20, the detection core 111 can quickly sense the temperature change of the object to be measured 20 and convert the temperature change into a linearly changing resistance value. After the switching mechanism 200 acquires the resistance value, the temperature of the object to be measured 20 can be accurately obtained through simple linear calculation. Compared to ordinary thermistor materials, the linear characteristic makes temperature measurement more accurate and calculation simpler, providing more accurate temperature data. Furthermore, the insulation layer 112 is made of insulating material and covers the outer surface of the detection core 111. The insulation layer 112 can effectively prevent the detection core 111 from making electrical contact with the metal shell or other live parts of the test object 20, thus preventing short circuit faults.

[0045] Furthermore, in some embodiments, the detection core 111 is in the shape of a spiral strip, and the detection electrode 120 is located on one side of the detection core 111, with multiple detection electrodes 120 arranged in a straight line at equal intervals. Each turn of the detection core 111 is connected to one detection electrode 120. For example, continue to refer to... Figure 1 and Figure 2 As shown, the detection core 111 is wound around the outer surface of the object under test 20, making the outline of the resistive detection component 110 approximately cylindrical. The spiral strip-shaped detection core 111 design increases the contact area between the resistive detection component 110 and the object under test 20, improving heat exchange efficiency. Simultaneously, since each ring of the detection core 111 is equipped with a detection electrode 120, and multiple detection electrodes 120 are arranged at equal intervals in a straight line, connecting the switching mechanism 200 to the detection electrodes 120 corresponding to two rings of the detection core 111 respectively allows measurement of the temperature of the corresponding area of ​​the object under test 200 between the two rings. Therefore, the temperature of multiple detection points can be obtained through the detection electrodes 120 corresponding to each ring of the detection core, providing a more detailed reflection of the overall temperature of each area of ​​the object under test 20.

[0046] It should be understood that in other alternative embodiments, depending on the application scenario, the detection core 111 may also be wound around the outer surface of the object to be tested 20 in other ways, so that the outline of the resistive detection component 110 is spherical, conical, gourd-shaped or other irregular shapes.

[0047] See Figure 4 and Figure 5 As shown, in some embodiments, the insulating guide mechanism 300 includes a guide member 310 and a connecting member 320. The guide member 310 forms a guide groove 314. Exemplarily, the guide member 310 is made of an insulating material such as plastic and is linear. Correspondingly, the guide groove 314 extends in a straight line to allow the switching mechanism 200 to slide quickly within the guide groove 314, improving the efficiency of temperature measurement operations. The connecting member 320 is connected to the guide member 310 and protrudes into the guide groove 314. The connecting member 320 has a connecting through hole 321. The detection electrode 120 passes through the connecting through hole 321 and extends into the guide groove 314. The connecting member 320 can improve the installation stability of the detection electrode 120 and avoid the problem of displacement of the detection electrode 120 due to impact, friction, or other reasons during the sliding process of the switching mechanism 200 to make contact with the detection electrode 120 for conductivity. By configuring the insulating guide mechanism 300 in the manner described above, it is possible to ensure the stable sliding of the switching mechanism 200 within the guide groove 314, while also providing a reliable contact method for the connection between the switching mechanism 200 and the detection electrode 120, thereby ensuring the stable connection of the detection circuit during the measurement process and improving the accuracy of the measurement.

[0048] It should be understood that in other alternative embodiments, the guide component 310 may also be configured in a spiral, wave-like or other structural form to adapt to different temperature detection scenarios.

[0049] See Figure 5 As shown, in some embodiments, the guide member 310 includes a first sidewall 311, a second sidewall 312, and a third sidewall 313. The third sidewall 313, the first sidewall 311, and the second sidewall 312 form a guide groove 314, and an opening is formed between the third sidewall 313 and the first sidewall 311. Specifically, the first sidewall 311 is connected to the connecting member 320, the second sidewall 312 is connected between the first sidewall 311 and the third sidewall 313, and the third sidewall 313 is disposed opposite to the first sidewall 311. The first sidewall 311, the second sidewall 312, and the third sidewall 313 are sequentially connected to form a semi-enclosed structure. The central region of this semi-enclosed structure forms the guide groove 314, and the detection electrode 120 extends into the guide groove 314 through the connecting through hole 321 of the connecting member 320. Furthermore, when the switching mechanism 200 slides within the guide groove 314, the switching electrode 210 can be externally connected to a wire through the opening between the third sidewall 313 and the first sidewall 311. The guide groove 314, formed by three side walls, has a stable structure and provides a stable sliding track for the switching mechanism 200, which facilitates the smooth sliding of the switching mechanism 200 within the guide groove 314, thereby enabling connection with different detection electrodes 120 and temperature measurement.

[0050] See Figures 6 to 8 As shown, in some embodiments, the switching mechanism 200 includes a switching electrode 210, a first wire 220, and a second wire 230. The first wire 220 is electrically connected to a switching electrode 210; the second wire 230 is electrically connected to another switching electrode 210 or to a detection electrode 120. Specifically, the switching electrode 210 is slidably connected to the guide member 310 via a guide groove 314. When the switching electrode 210 moves to the target area, it connects to a corresponding detection electrode 120.

[0051] Optionally, the other end of the first wire 220 is connected to a power supply, and the other end of the second wire 230 is connected to a ground terminal, thereby forming a detection circuit. The detection interface of the control board is connected to the acquisition point of the detection circuit. Upon receiving a voltage signal, the control board converts the corresponding voltage signal into a resistance value and obtains the temperature value based on the relationship between the material's resistance and temperature. The control board can be a microcontroller, and the resistance value and temperature relationship are stored in the microcontroller's memory. It is understood that converting a voltage signal into a resistance value and obtaining the temperature value based on the material's resistance and temperature relationship is existing technology and will not be elaborated upon here.

[0052] In this embodiment, the first wire 220 and the second wire 230 can be connected to the detection electrode 120 via the switching electrode 210 or directly to the detection electrode 120. The connection method can be adjusted according to the usage requirements, making the detection more flexible.

[0053] For example, see Figure 9 As shown, in some embodiments, there are two switching electrodes 210. The driving mechanism synchronously drives the two switching electrodes 210, and the two switching electrodes 210 are respectively connected to the first wire 220 and the second wire 230. Specifically, when two switching electrodes 210 are used to form a detection circuit, the first wire 220 is connected to one detection electrode 120 through one switching electrode 210, and the second wire 230 is connected to another detection electrode 120 through the other switching electrode 210, thereby forming a corresponding detection circuit.

[0054] For example, see Figure 10 or Figure 11 As shown, in some embodiments, there is one switching electrode 210. The first wire 220 is connected to a corresponding detection electrode 120 through the switching electrode 210, and the second wire 230 is directly connected to another detection electrode 120. Specifically, when one switching electrode 210 is used to form a detection circuit, the first wire 220 is directly connected to one detection electrode 120, and the second wire 230 is connected to another detection electrode 120 through the switching electrode 210, thereby forming the corresponding detection circuit.

[0055] For example, in some other embodiments, the measurement may be performed without using the switching electrode 210. In this case, the first wire 220 is directly connected to one detection electrode 120 and the second wire 230 is connected to another detection electrode 120, thereby forming a corresponding detection circuit.

[0056] The above-mentioned method of setting the number of switching electrodes 210 provides options for different application scenarios and measurement needs, improving the applicability and flexibility of the testing device 10.

[0057] Continue reading Figures 6 to 8As shown, in some embodiments, the switching electrode 210 includes an electrode body 211 and a terminal 212. The electrode body 211 is slidably connected to the guide member 310 via a guide groove 314. The electrode body 211 is provided with a conductive groove 211a, the shape of which is adapted to the shapes of the connecting member 320 and the detection electrode 120 to facilitate precise positioning of the sliding position of the electrode body 211. Furthermore, the space of the conductive groove 211a can be slightly larger than the space occupied by the corresponding connecting member 320 and the detection electrode 120, so that a certain gap is left between the inner wall of the conductive groove 211a and the connecting member 320 and the detection electrode 120, avoiding collision or friction between the electrode body 211 and the connecting member 320 and the detection electrode 120 when sliding, while increasing the flexibility of the electrode body 211 sliding. The inner wall of the conductive groove 211a is provided with a conductive surface 211b for contacting and conducting electricity with the detection electrode 120. For example, the conductive surface 211b can be a metal surface made of metal. Terminal 212 is embedded in electrode body 211 and electrically connected to conductive surface 211b. Terminal 212 is configured to connect to first wire 220 or second wire 230. Thus, the temperature measurement area can be flexibly adjusted when electrode body 211 of switching electrode 210 slides in guide groove 314 and connects to detection electrodes 120 at different positions.

[0058] Another embodiment of this application provides a testing method, which includes the following steps:

[0059] S10. Connect the resistive detection component 110 to the object under test 20. Specifically, taking temperature testing as an example, step S10 includes: connecting the resistive detection component 110 to the object under test 20 so that the resistive detection component 110 and the object under test 20 can exchange heat. Exemplarily, the detection core 111 of the resistive detection component 110 is in the shape of a spiral strip, and the resistive detection component 110 is evenly wound around the outer surface of the object under test 20.

[0060] S20. Two detection points are selected on the resistive detection component 110. The switching mechanism 200 is connected to the two selected detection points to form a detection loop. The resistance value of the resistive detection component 110 located within the detection loop is measured through the switching mechanism 200, thereby obtaining the test data of the object under test 20 corresponding to the resistive detection component 110 between the two selected detection points. Specifically, taking temperature testing as an example, step S20 includes: connecting the switching mechanism 200 to the two detection electrodes 120 of the resistive detection component 110 to form a detection loop, and measuring the resistance value of the resistive detection component 110 located within the detection loop through the switching mechanism 200, thereby obtaining the temperature of the object under test 20 corresponding to the resistive detection component 110 between the two detection electrodes 120.

[0061] The testing method of this application embodiment can flexibly select the measurement area according to actual needs, and connect the switching mechanism 200 with the two detection electrodes 120 of the corresponding area to form a detection circuit. By measuring the resistance value of the resistive detection component 110 and converting it, the temperature, humidity, pressure and other data of the corresponding area of ​​the object under test 20 can be obtained.

[0062] Furthermore, the temperature of multiple detection points can be obtained through the detection electrode 120 corresponding to each ring of resistive detection component 110, thereby better reflecting the overall temperature of the entire object under test 20.

[0063] For example, taking a liquid temperature range of 0~80 degrees Celsius within the test object 20 as an example, the resistance value of the corresponding thermistor changes linearly within this temperature range. This thermistor can effectively reflect the overall temperature within the entire test object 20. The testing principle of the thermistor can be understood as dividing the thermistor into n equal segments, denoted as a1, a2, a3, ..., an. These n segments of the thermistor can continuously measure the temperature changes in the contact area.

[0064] Specifically, let the relationship between the resistance of the thermistor and temperature be: R = aT + b, where R is the resistance of the thermistor, T is the temperature of the thermistor, and a and b are constants.

[0065] The resistance values ​​of the n segments of the thermistor material can be expressed as: R1=aT1+b, R2=aT2+b, ..., Rn=aTn+b.

[0066] When the temperature at all points inside the test object 20 stabilizes at T1, the corresponding total resistance Rw at the stable temperature is: Rw=R1+R2+…Rn=naT1+nb.

[0067] When the temperature at various points within the test object 20 fluctuates between T1 and Tn, the total resistance Rb during the corresponding temperature fluctuation is: Rb = R1 + R2 + ... + Rn = a(T1 + T2 + ... + Tn) + nb.

[0068] The ratio of the total temperature Tw when the temperature is stable at T1 to the total temperature Tb when the temperature fluctuates between T1 and Tn is:

[0069]

[0070] The ratio of the total resistance Rw when the temperature is stable at T1 to the total resistance Rb when the temperature fluctuates between T1 and Tn satisfies the following relationship:

[0071]

[0072] Where n and b are reference values ​​for the thermistor material, determined by its physical properties. A comparison shows that after subtracting the reference resistance nb, the ratio of total temperature to total resistance is proportional to the aforementioned ratio relationship between the total resistance and the reference resistance.

[0073] Therefore, if the temperature distribution of the test object 20 is uneven, the resistance value of each segment will also change with different temperatures. Since the resistance value and temperature are linearly related, the change in the total resistance value also reflects the temperature distribution. That is, when the total resistance value remains basically unchanged, it indicates that the temperature distribution is uniform. At this time, the temperature measured by the test device 10 can accurately reflect the overall temperature.

[0074] Furthermore, in order to improve the accuracy and applicability of the test results, the test method can be optimized so that the test method can accurately measure the temperature of the corresponding area of ​​the test object 20 between the two-layer resistive detection components 110.

[0075] In some embodiments, step S20 of the testing method includes the following steps:

[0076] S21. According to the arrangement order of the detection electrodes 120 of the resistive detection component 110, two adjacent detection electrodes 120 are connected to the switching mechanism 200 to form a detection circuit. The resistance value of the resistive detection component 110 located in each detection circuit is measured by the switching mechanism 200, thereby obtaining the temperature of the test object 20 corresponding to the resistive detection component 110 between two adjacent detection electrodes 120 in sequence.

[0077] S22. The overall temperature of the object under test 20 is calculated based on the temperature of the resistive detection component 110 between all two adjacent detection electrodes 120.

[0078] Combination Figure 12 As shown, according to the arrangement order of the detection electrodes 120 of the resistive detection component 110, the layers of the resistive detection component 110 at different heights are labeled D1, D2, D3, ..., Dn, and the average temperature of each layer is T(D1), T(D2), ..., T(Dn). Since the shape and size of the object to be tested 20 are measurable, the cross-sectional area of ​​the object to be tested 20 as a function of height S(D1), S(D2), ..., S(Dn), the volume as a function of height V(D1), V(D2), ..., V(Dn), and the total volume V of the object to be tested 20 can be obtained. The overall temperature inside the object to be tested 20 is obtained by multiplying the average temperature of each layer by the corresponding area coefficient and then adding them together. The calculation formula is as follows:

[0079]

[0080] Under this formula, the temperature of each region of the test object 20 is calculated separately, and the cross-sectional area parameter is included. Therefore, even if the shape of the test object 20 is not fixed, or the resistance detection component 110 is not wound evenly, resulting in different areas of each layer, the above test method can still accurately measure the temperature of the test object 20 corresponding to any layer of resistance detection component 110 at a certain moment, the temperature difference between adjacent layers of resistance detection component 110, and the pattern of heat diffusion, thereby more comprehensively and accurately reflecting the overall temperature of the test object 20.

[0081] Furthermore, in some other embodiments, step S20 of the testing method includes the following steps:

[0082] S21' Select one detection electrode 120 of the resistive detection component 110 as the base electrode, connect the base electrode to the switching mechanism 200, and connect the other detection electrodes 120 to the switching mechanism 200 in order of distance from the base electrode to form a detection loop. Measure the resistance value of the resistive detection component 110 located in each detection loop through the switching mechanism 200, thereby obtaining the temperature of the test object 20 corresponding to the resistive detection component 110 between the base electrode and each other detection electrode 120 in sequence.

[0083] S22': Based on the temperature of the object under test 20 corresponding to the resistive detection component 110 between all the base electrodes and each other detection electrode 120, the overall temperature of the object under test 20 is calculated.

[0084] Combination Figure 11 As shown, the detection electrode 120 at the lowest end of the resistance detection component 110 is selected as the base electrode. The base electrode is directly connected to the first wire 220 of the switching mechanism 200 and kept stationary. The second wire 230 of the switching mechanism 200 is slidably connected to the insulating guide mechanism 300 through a switching electrode 210. During the measurement process, the height difference between the switching electrode 210 and the bottom surface is taken as y. The switching electrode 210 slides uniformly from the lowest end to the highest end, and the resistance value is measured as R(y) according to the height. Based on the shape of the object under test 20, the variation of the ring area with height S(y) can be obtained. Based on the winding method of the resistance detection component 110, the variation of the length of the resistance detection component 110 with height L can be obtained. r (y). Therefore, during the sliding process of the switching electrode 210, multiple detection loops will be formed sequentially due to the change in height, and the resistance values ​​of these multiple detection loops will be measured sequentially as R(y1), R(y2), ..., R(y). n The resistivity coefficient α based on the thermistor material (unit: Ω•℃) -1 •cm -1The temperature value of the resistance sensing component 110 in each layer can be calculated sequentially using the inverse function, as shown in the following formula:

[0085]

[0086] When there are no abrupt temperature changes between adjacent layers, such as when the liquid within the test object 20 has good fluidity, the calculated temperature value can be approximated as a linear change with height. Combining height and temperature, the temperature variation with height T(y) can be obtained. Then, by combining this with S(y), the total average temperature T can be calculated. 均 .

[0087]

[0088] The testing method in this embodiment selects a detection electrode 120 as the base electrode. Other detection electrodes 120 are connected to the switching mechanism 200 in order of distance from the base electrode to form a detection loop. Resistance values ​​are measured to obtain the temperature at different locations, and finally, the overall temperature is calculated. This method can accurately measure the overall temperature of the object under test 20 and reduces the need to move the switching electrode 210, effectively shortening the testing time and improving testing efficiency.

[0089] Another embodiment of this application provides a water heater, which includes an inner tank for storing water, and a testing device 10 is disposed on the outer wall of the inner tank. For example, as shown... Figure 2 As shown, when the object to be tested 20 is the inner tank, the resistive detection component 110 of the testing device 10 is wrapped around the outer wall of the inner tank. Based on the structural design of the testing device 10, the testing device 10 can flexibly detect parameters such as temperature, humidity, and pressure in different parts of the inner tank, and the detection results are accurate. It is especially suitable for accurately detecting temperature distribution data so that the water heater can control the temperature precisely.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A testing device, characterized in that, The testing device (10) includes: The resistive detection component (110) is elongated and is used to be installed on the object to be tested. The resistive detection component (110) has multiple detection points arranged at intervals. A switching mechanism (200) is used to connect to a control panel, the switching mechanism (200) being configured to selectively connect to two of the plurality of detection points to form a detection loop.

2. The testing apparatus according to claim 1, characterized in that, The switching mechanism (200) includes: At least one switching electrode (210); A driving mechanism is used to drive the switching electrode (210) to move so that the switching electrode (210) can contact different detection points.

3. The testing apparatus according to claim 2, characterized in that, The testing device also includes an insulation guide mechanism (300), which has a guide groove (314), and the switching electrode (210) is slidably connected to the insulation guide mechanism (300) through the guide groove (314).

4. The testing apparatus according to claim 3, characterized in that, The resistive detection component (110) is provided with a plurality of detection electrodes (120) spaced apart. The detection electrodes (120) serve as the detection points. The detection electrodes (120) extend into the guide groove (314). The driving mechanism drives the switching electrode (210) to slide in the guide groove (314) so ​​that the switching electrode (210) can contact different detection electrodes (120).

5. The testing apparatus according to claim 4, characterized in that, The insulating guide mechanism (300) includes: Guide component (310), the guide component (310) forms the guide groove (314); Connecting component (320); the connecting component (320) is connected to the guiding component (310) and protrudes into the guiding groove (314), and the connecting component (320) is provided with a connecting through hole (321). The detection electrode (120) passes through the connecting through hole (321) and extends into the guide groove (314).

6. The testing apparatus according to claim 5, characterized in that, The guide component (310) includes: The first sidewall (311) is connected to the connecting member (320); The second sidewall (312) is connected to the first sidewall (311); The third sidewall (313) is connected to the side of the second sidewall (312) away from the first sidewall (311). The third sidewall (313) is disposed opposite to the first sidewall (311). The third sidewall (313), the first sidewall (311), and the second sidewall (312) together form the guide groove (314). An opening is formed between the third sidewall (313) and the first sidewall (311).

7. The testing apparatus according to claim 4, characterized in that, The switching mechanism (200) further includes: The first wire (220) is electrically connected to one of the switching electrodes (210); The second lead wire (230) is electrically connected to another of the switching electrodes (210) or to the detection electrode (120).

8. The testing apparatus according to claim 7, characterized in that, The switching electrode (210) includes: Electrode body (211), the electrode body (211) is slidably connected to the insulating guide mechanism (300) through the guide groove (314), the electrode body (211) is provided with a conductive groove (211a), and the inner wall of the conductive groove (211a) is provided with a conductive surface (211b) for contacting and conducting electricity with the detection electrode (120). Terminal (212) is embedded in the electrode body (211) and electrically connected to the conductive surface (211b). The terminal (212) is configured to connect to the first wire (220) or the second wire (230).

9. The testing apparatus according to claim 8, characterized in that, The number of switching electrodes (210) is two, and the two switching electrodes (210) are respectively connected to the first wire (220) and the second wire (230); or The number of switching electrodes (210) is one, the first wire (220) is configured to be connected to a corresponding detection electrode (120) through the switching electrode (210), and the second wire (230) is configured to be directly connected to another detection electrode (120).

10. A water heater, characterized in that, It includes an inner liner, the outer wall of which is provided with a testing device as described in any one of claims 1 to 9.

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