Electric fan heater test platform

Abstract

The utility model relates to the field of electric warm air blowers, and provides an electric warm air blower test platform comprising a control circuit; the first temperature protection test circuit comprises a first heating platform and a first thermocouple sensor, the first heating platform and the first thermocouple sensor are electrically connected with the control circuit, and the first thermocouple sensor is used for collecting the temperature value of the first heating platform; the second temperature protection test circuit comprises a second heating platform and a second thermocouple sensor, the second heating platform and the second thermocouple sensor are electrically connected with the control circuit, and the second thermocouple sensor is used for collecting the temperature value of the second heating platform; and the voltage and current test circuit comprises a direct current 600V test circuit, a direct current 110V test circuit and a direct current 24V test circuit. The method and the device are used for solving the defect that the performance of the electric warm air blower cannot be accurately and comprehensively tested in the prior art, the internal structure of the electric warm air blower can be respectively tested, and the test result is more comprehensive.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric fan heater technical field especially relates to a kind of electric fan heater test platform. BACKGROUND

[0002] Electric fan heater is also called forced fan heater, it is a kind of through electric energy conversion into heat energy, and through the way of forced convection, hot air is sent into specified position, to play the role of heating equipment.

[0003] In related art, when the quality of electric fan heater is detected, the appearance and structure of electric fan heater are often checked, and the function and durability of electric fan heater are tested as a whole, the content of test is not comprehensive enough, and the performance level of the electric fan heater to be tested cannot be accurately reflected. INVENTION CONTENTS

[0004] The utility model provides a kind of electric fan heater test platform, to solve the defect that performance test cannot be accurately and comprehensively carried out to electric fan heater in relevant technology, the scheme of the application can test the internal structure of electric fan heater respectively, and test result is more comprehensive.

[0005] The utility model provides a kind of electric fan heater test platform, comprising:

[0006] Control circuit;

[0007] First temperature protection test circuit, including first heating platform and first thermocouple sensor, the first heating platform and the first thermocouple sensor are electrically connected with the control circuit, and the first thermocouple sensor is used to collect the temperature value of the first heating platform;

[0008] Second temperature protection test circuit, including second heating platform and second thermocouple sensor, the second heating platform and the second thermocouple sensor are electrically connected with the control circuit, and the second thermocouple sensor is used to collect the temperature value of the second heating platform;

[0009] Voltage current test circuit, including direct current 600 volts test circuit, direct current 110 volts test circuit and direct current 24 volts test circuit, the direct current 600 volts test circuit includes direct current 600 volts power supply, the direct current 600 volts power supply is electrically connected with the electric fan heater to be tested by direct current 600 volts voltage sensor, and is electrically connected with the electric fan heater to be tested by direct current 600 volts current sensor, the direct current 600 volts voltage sensor and direct current 600 volts current sensor are electrically connected with the control circuit;

[0010] The direct current 110-volt test circuit comprises a direct current 110-volt power supply, which is electrically connected with the electric heater to be tested through a direct current 110-volt voltage sensor and through a direct current 110-volt current sensor, and the direct current 110-volt voltage sensor and the direct current 110-volt current sensor are electrically connected with the control circuit.

[0011] The direct current 24-volt test circuit comprises a direct current 24-volt power supply, which is electrically connected with the electric heater to be tested through a direct current 24-volt voltage sensor and through a direct current 24-volt current sensor, and the direct current 24-volt voltage sensor and the direct current 24-volt current sensor are electrically connected with the control circuit.

[0012] According to the electric heater test platform provided by the utility model, the control circuit comprises a single-chip microcomputer, an ADC analog-digital conversion circuit and a communication circuit.

[0013] The communication circuit is electrically connected with the first heating platform, the first thermocouple sensor, the second heating platform, the second thermocouple sensor, the direct current 600-volt voltage sensor, the direct current 600-volt current sensor, the direct current 110-volt voltage sensor, the direct current 110-volt current sensor, the direct current 24-volt voltage sensor and the direct current 24-volt current sensor.

[0014] The ADC analog-digital conversion circuit is used for analog-digital conversion of the received data.

[0015] According to the electric heater test platform provided by the utility model, the electric heater test platform further comprises an air outlet temperature test circuit, which comprises a third thermocouple sensor, the third thermocouple sensor is electrically connected with the control circuit, and the third thermocouple is used for collecting the air outlet temperature of the electric heater to be tested.

[0016] According to the electric heater test platform provided by the utility model, the direct current 24-volt voltage sensor is further electrically connected with the first thermocouple sensor, the second thermocouple sensor and the third thermocouple.

[0017] The direct current 24-volt current sensor is further electrically connected with the first thermocouple sensor, the second thermocouple sensor and the third thermocouple.

[0018] According to the electric heater test platform provided by the utility model, the single-chip microcomputer is an STM32L431 single-chip microcomputer.

[0019] According to the electric heater test platform provided by the utility model, the electric heater test platform is powered through a direct current 220-volt power supply.

[0020] The direct current 220-volt power supply is connected with the direct current 600-volt power supply, the direct current 110-volt power supply and the direct current 24-volt power supply.

[0021] The control circuit is connected with an industrial computer, and the industrial computer is further connected with the first heating platform and the second heating platform.

[0022] In the electric heating fan test platform, a plurality of test circuits are integrated and connected to one test circuit, and the internal structures of the electric heating fan can be comprehensively tested by one test circuit, and the detection process is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will be a simple introduction to the drawings needed to be used in the embodiment or the prior art description, obviously, the following description of the drawings is some embodiments of the utility model, for those skilled in the art, without creative labor, other drawings can also be obtained according to these drawings.

[0024] Figure 1 It is the structure schematic view of electric heating fan test platform provided by the utility model embodiment;

[0025] Figure 2 It is the structure schematic view of first temperature protection test circuit provided by the utility model embodiment;

[0026] Figure 3 It is the structure schematic view of second temperature protection test circuit provided by the utility model embodiment;

[0027] Figure 4 It is the structure schematic view of direct current 600-volt test circuit provided by the utility model embodiment;

[0028] Figure 5 It is the structure schematic view of direct current 110-volt test circuit provided by the utility model embodiment;

[0029] Figure 6 It is the structure schematic view of direct current 24-volt test circuit provided by the utility model embodiment;

[0030] Figure 7 It is the structure schematic view of control circuit provided by the utility model embodiment;

[0031] Figure 8It is a structural schematic diagram of the air outlet temperature test circuit provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0033] Figure 1 It is a structural schematic diagram of the electric heater test platform provided by the embodiment of the utility model.

[0034] As Figure 1 shown, the embodiment provides an electric heater test platform, which comprises:

[0035] a control circuit;

[0036] a first temperature protection test circuit, which comprises a first heating platform and a first thermocouple sensor, the first heating platform and the first thermocouple sensor are electrically connected with the control circuit, and the first thermocouple sensor is used for collecting the temperature value of the first heating platform;

[0037] a second temperature protection test circuit, which comprises a second heating platform and a second thermocouple sensor, the second heating platform and the second thermocouple sensor are electrically connected with the control circuit, and the second thermocouple sensor is used for collecting the temperature value of the second heating platform;

[0038] a voltage and current test circuit, which comprises a direct current 600-volt test circuit, a direct current 110-volt test circuit and a direct current 24-volt test circuit, the direct current 600-volt test circuit comprises a direct current 600-volt power supply, the direct current 600-volt power supply is electrically connected with the electric heater to be tested through a direct current 600-volt voltage sensor and is electrically connected with the electric heater to be tested through a direct current 600-volt current sensor, and the direct current 600-volt voltage sensor and the direct current 600-volt current sensor are electrically connected with the control circuit;

[0039] the direct current 110-volt test circuit comprises a direct current 110-volt power supply, the direct current 110-volt power supply is electrically connected with the electric heater to be tested through a direct current 110-volt voltage sensor and is electrically connected with the electric heater to be tested through a direct current 110-volt current sensor, and the direct current 110-volt voltage sensor and the direct current 110-volt current sensor are electrically connected with the control circuit;

[0040] The DC 24V test circuit includes a DC 24V power supply, which is electrically connected to the electric heater under test via a DC 24V voltage sensor and a DC 24V current sensor. The DC 24V voltage sensor and the DC 24V current sensor are electrically connected to the control circuit.

[0041] The electric heater in this embodiment can be a heater used on trains.

[0042] During implementation, such as Figure 1 As shown, an industrial control computer can also be set up in the electric heater test platform. The industrial control computer stores a computer control program, which can be based on existing technology. During the actual test, the industrial control computer can obtain the user's test instructions. For example, buttons can be set on the industrial control computer, or touch triggers can be set on the display screen. By clicking the button on the industrial control computer or touching the trigger, test instructions can be generated. The test instructions are sent to the connected control circuit. The control circuit can control the corresponding test circuit to start working based on the received test instructions to test the electric heater under test.

[0043] In practical applications, electric heaters need to continuously produce hot air during operation, resulting in high internal temperatures. High temperatures can damage internal components. Therefore, this embodiment requires testing the temperature of the internal components of the electric heater under test. The testing method can refer to existing technologies. For example, electric heaters are equipped with temperature protection switches and temperature protection fuses to protect internal components. The first temperature protection test circuit can be used to test the temperature protection switch of the electric heater under test. A temperature protection switch is a temperature switch that uses a bimetallic strip as a temperature sensing element. When the appliance is working normally, the bimetallic strip is in a free state, and the contacts are in a closed / open state. When the temperature rises to the operating temperature value, the bimetallic element generates internal stress due to heat and quickly actuates, opening / closing the contacts, cutting off / connecting the circuit, thereby providing thermal protection. Figure 2 As shown, in this embodiment, a first heating platform can be used to test the temperature protection switch under test. Specifically, the temperature protection switch under test in this embodiment can change its connection state at 80 degrees Celsius. Therefore, the first heating platform can be heated to 80 degrees Celsius. During this process, a first thermocouple sensor can be used to monitor the temperature value of the first heating platform. When the temperature of the first heating platform reaches 80 degrees Celsius, if the temperature protection switch under test can change its connection state, for example, from a connected state to a disconnected state, it indicates that the temperature protection switch under test has passed the test.

[0044] In practical applications, the second temperature protection test circuit can test the temperature protection fuse of the electric heater to be tested. The temperature protection fuse is also a device for temperature overheating protection. When the circuit, the surface of the parts, or the system is overheated due to excessive current, the fuse is opened or burned out to prevent the parts from being dangerously overheated in a fault condition, thereby avoiding accidents. Specifically, the lead and the live plate in the temperature protection fuse maintain good contact under the pressure of the opening spring and the compression spring, and form a conductive path through the shell. When the temperature fuse senses a temperature exceeding the action temperature, the temperature sensing body (thermal sensitive pellet) melts, the compression spring is released, and the lead and the live plate are quickly separated under the thrust of the opening spring, cutting off the power supply and playing a protective role. The temperature protection fuse inside the electric heater to be tested can use a temperature protection fuse of 120 degrees Celsius or a temperature protection fuse of 150 degrees Celsius. The test method of the temperature protection fuse can be performed according to the prior art. For example, in the actual test process, the two types of temperature protection fuses can be tested respectively. Since the temperature protection fuse is a disposable product, the test process can be completed by sampling, as shown in Figure 3 In the embodiment, the second heating platform and the second thermocouple sensor can be used to test the temperature protection fuse to be tested. During the test, the temperature value of the second heating platform can be monitored by the second thermocouple sensor. When the temperature value of the second heating platform is heated to 120 degrees Celsius, if the temperature protection fuse of 120 degrees Celsius can be fused, it means that the temperature protection fuse passes the test. Then, the temperature protection fuse of 150 degrees Celsius is tested again. Similarly, the temperature value of the second heating platform can be monitored by the second thermocouple sensor. When the temperature value of the second heating platform is heated to 150 degrees Celsius, if the temperature protection fuse of 150 degrees Celsius to be tested can be fused, it means that the temperature protection fuse passes the test.

[0045] The voltage and current test circuit in the embodiment is mainly used to test whether the rated voltage and the rated current of the electric heater are accurate. Specifically, the electric heater to be tested can support direct current of 600 volts, 110 volts, and 24 volts. Therefore, in the embodiment, the test under different voltages can be completed by the direct current 600 volt test circuit, the direct current 110 volt test circuit, and the direct current 24 volt test circuit.

[0046] Figure 4 The structure diagram of the direct current 600 volt test circuit provided in the embodiment is shown in Figure 4 The direct current 600 volt power supply is electrically connected to the electric heater to be tested through the direct current 600 volt voltage sensor and the direct current 600 volt current sensor, and the direct current 600 volt voltage sensor and the direct current 600 volt current sensor are electrically connected to the I / O circuit of the control circuit.

[0047] Figure 5 A structure diagram of a direct current 110-volt test circuit provided by the embodiment of the utility model is shown in the figure, Figure 5 The direct current 110-volt power supply is electrically connected with the to-be-tested electric heating fan through a direct current 110-volt voltage sensor and a direct current 110-volt current sensor, and the direct current 110-volt voltage sensor and the direct current 110-volt current sensor are electrically connected with the control circuit.

[0048] Figure 6 A structure diagram of a direct current 24-volt test circuit provided by the embodiment of the utility model is shown in the figure, Figure 6 The direct current 24-volt power supply is electrically connected with the to-be-tested electric heating fan through a direct current 24-volt voltage sensor and a direct current 24-volt current sensor, and the direct current 24-volt voltage sensor and the direct current 24-volt current sensor are electrically connected with the control circuit.

[0049] In the electric heating fan test platform provided by the embodiment, a plurality of test circuits are connected through the control circuit, and the test circuits include a first temperature protection test circuit, a second temperature protection test circuit, a voltage and current test circuit and the like; by integrating the plurality of test circuits and connecting them to one test circuit, the internal structures of the electric heating fan can be comprehensively tested by one test circuit, and the detection process is more convenient.

[0050] Figure 7 A structure diagram of the control circuit provided by the embodiment of the utility model is shown in the figure.

[0051] As shown in the figure, Figure 7 In the exemplary embodiment, the control circuit includes a single-chip microcomputer, an ADC analog-digital conversion circuit and a communication circuit;

[0052] The communication circuit is electrically connected with the first heating platform, the first thermocouple sensor, the second heating platform, the second thermocouple sensor, the direct current 600-volt voltage sensor, the direct current 600-volt current sensor, the direct current 110-volt voltage sensor, the direct current 110-volt current sensor, the direct current 24-volt voltage sensor and the direct current 24-volt current sensor;

[0053] The ADC analog-digital conversion circuit is used for analog-digital conversion of the received data.

[0054] In actual application, the communication circuit can communicate by applying RS-485 serial communication standard, and the main function of the communication circuit is to realize communication between the control circuit and the industrial computer and communication between the control circuit and the connected various test circuits.

[0055] The ADC analog-digital conversion circuit, namely the A / D converter, can be used to convert an analog signal into a digital signal, and in the embodiment, the data collected by various sensors are mainly A / D converted, such as the first thermocouple sensor, the second thermocouple sensor, the DC 600-volt voltage sensor, the DC 600-volt current sensor, the DC 110-volt voltage sensor, the DC 110-volt current sensor, the DC 24-volt voltage sensor, and the DC 24-volt current sensor.

[0056] As shown in Figure 7 The control circuit in the embodiment can further include an output driving chip and a power management chip, wherein the output driving chip is used to execute the instructions of the I / O port of the single-chip microcomputer to turn on the power supply and drive the first and second heating platform heating circuits during the automatic testing of the system, and the power management chip is used to provide the required power supply for the single-chip microcomputer, the communication circuit, the ADC analog-digital conversion circuit and other control chips, thereby improving the electromagnetic compatibility of the whole control circuit.

[0057] Figure 8 is a structural schematic diagram of the air outlet temperature testing circuit provided by the embodiment of the utility model.

[0058] As shown in Figure 8 The exemplary embodiment further includes an air outlet temperature testing circuit, which includes a third thermocouple sensor, the third thermocouple sensor is electrically connected with the control circuit, and the third thermocouple is used to collect the air outlet temperature of the electric heater.

[0059] The main function of the electric heater is to output hot air, therefore, the air outlet temperature of the electric heater is also an important part of the testing process, and the testing method of the air outlet temperature of the electric heater can be performed according to the prior art, for example, in the embodiment, the temperature of the air outlet of the electric heater can be collected in real time by a thermocouple sensor, and compared with the standard value, if the air outlet temperature of the electric heater to be tested cannot reach the preset standard value, it means that the electric heater to be tested fails the test.

[0060] Specifically, the third thermocouple sensor can be electrically connected with the I / O circuit of the single-chip microcomputer in the control circuit.

[0061] As shown in Figure 6 In the exemplary embodiment, the DC 24-volt voltage sensor is also electrically connected with the first thermocouple sensor, the second thermocouple sensor and the third thermocouple;

[0062] The DC 24-volt current sensor is also electrically connected with the first thermocouple sensor, the second thermocouple sensor and the third thermocouple.

[0063] In the exemplary embodiment, the control circuit is an STM32L431 control circuit.

[0064] In an example embodiment, the electric fan heater test platform is powered by a 220 volt DC power supply.

[0065] In an example embodiment, the 220 volt DC power supply is connected to the 600 volt DC power supply, the 110 volt DC power supply, and the 24 volt DC power supply.

[0066] The device embodiments described above are merely illustrative, wherein the circuits illustrated as separate components can or can not be physically separated, and the components illustrated as circuits can or can not be physical circuits, i.e., can be located in one place or distributed to multiple network circuits. Part or all of the circuits can be selected to achieve the purposes of the embodiments according to actual needs. Those of ordinary skill in the art can understand and implement without creative labor.

[0067] From the above description of the embodiments, those of ordinary skill in the art can clearly understand that the embodiments can be implemented by means of software and the necessary universal hardware platforms, and of course can also be implemented by hardware. Based on such understanding, the above technical solutions, essentially or in terms of the contribution to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of the various embodiments or some parts of the embodiments.

[0068] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric fan heater test platform, characterised in that, include: Control circuit; The first temperature protection test circuit includes a first heating platform and a first thermocouple sensor. The first heating platform and the first thermocouple sensor are electrically connected to the control circuit. The first thermocouple sensor is used to collect the temperature value of the first heating platform. The second temperature protection test circuit includes a second heating platform and a second thermocouple sensor. The second heating platform and the second thermocouple sensor are electrically connected to the control circuit. The second thermocouple sensor is used to collect the temperature value of the second heating platform. The voltage and current testing circuit includes a DC 600V testing circuit, a DC 110V testing circuit, and a DC 24V testing circuit. The DC 600V testing circuit includes a DC 600V power supply, which is electrically connected to the electric heater under test via a DC 600V voltage sensor and a DC 600V current sensor. The DC 600V voltage sensor and the DC 600V current sensor are electrically connected to the control circuit. The DC 110V test circuit includes a DC 110V power supply, which is electrically connected to the electric heater under test via a DC 110V voltage sensor and a DC 110V current sensor. The DC 110V voltage sensor and the DC 110V current sensor are electrically connected to the control circuit. The DC 24V test circuit includes a DC 24V power supply, which is electrically connected to the electric heater under test via a DC 24V voltage sensor and a DC 24V current sensor. The DC 24V voltage sensor and the DC 24V current sensor are electrically connected to the control circuit.

2. The electric fan heater test platform of claim 1, wherein, The control circuit includes a microcontroller, an ADC analog-to-digital converter circuit, and a communication circuit. The communication circuit is electrically connected to the first heating platform, the first thermocouple sensor, the second heating platform, the second thermocouple sensor, the 600V DC voltage sensor, the 600V DC current sensor, the 110V DC voltage sensor, the 110V DC current sensor, the 24V DC voltage sensor, and the 24V DC current sensor. The ADC analog-to-digital converter circuit is used to perform analog-to-digital conversion on the received data.

3. The electric fan heater test platform of claim 1, wherein, It also includes an air outlet temperature testing circuit, including a third thermocouple sensor, which is electrically connected to the control circuit. The third thermocouple is used to collect the air outlet temperature of the electric heater under test.

4. The electric fan heater test platform of claim 3, wherein, The DC 24V voltage sensor is also electrically connected to the first thermocouple sensor, the second thermocouple sensor, and the third thermocouple. The 24V DC current sensor is also electrically connected to the first thermocouple sensor, the second thermocouple sensor, and the third thermocouple.

5. The electric fan heater test platform of claim 2, wherein, The microcontroller is an STM32L431 microcontroller.

6. The electric fan heater test platform of claim 1, wherein, The electric heater test platform is powered by a 220V DC power supply.

7. The electric fan heater test platform of claim 6, wherein, The direct current 220-volt power supply is connected with the direct current 600-volt power supply, the direct current 110-volt power supply and the direct current 24-volt power supply.

8. The electric fan heater test platform of claim 1, wherein, The control circuit is connected with an industrial computer, and the industrial computer is further connected with the first heating platform and the second heating platform.

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