Heat dissipation protection device and grid-connected test platform

Abstract

The utility model belongs to the technical field of grid-connected test platform heat dissipation, and particularly relates to a heat dissipation protection device and a grid-connected test platform, which comprise a relay board and at least one group of temperature control modules arranged on the relay board, wherein the temperature control module comprises a contactor and a temperature switch; the contactors are connected with the corresponding cooling fans; the temperature switch is connected with the contactor; the contactor is suitable for controlling the heat dissipation fan to start according to the temperature, and the temperature switch is suitable for controlling the heat dissipation fan to start according to another temperature; the starting heat dissipation of the heat dissipation fan is doubly controlled according to the temperature, the consumption is reduced, and the heat dissipation effect is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat dissipation of a grid-connected test platform, and specifically relates to a heat dissipation protection device and a grid-connected test platform. Background Art

[0002] In related technologies, the power of photovoltaic inverters and energy storage converters is getting larger and larger. In order to ensure the performance of the products, they need to be tested at full power and connected to the grid before leaving the factory. There are more and more cables between test equipment and between test equipment and the products to be tested. Temperature monitoring and over-temperature protection between cables are becoming more and more important.

[0003] Due to site limitations and site aesthetics, cables are usually placed in cable ducts. When the product is tested at full power for a long time, the temperature of the cables will become higher and higher. The relevant heat dissipation methods are opening holes in the cable duct for natural air cooling, or built-in cooling fans in the cable duct for forced air cooling; then the use of the cables is regularly inspected and maintained. These two solutions cannot detect the temperature of the cables in real time during product testing, and cannot determine the effect of natural air cooling or forced air cooling.

[0004] Therefore, based on the technical problem that the cooling fan cannot be dual-controlled according to the real-time temperature to dissipate heat, it is necessary to design a new heat dissipation protection device and grid-connected test platform. Utility Model Content

[0005] The purpose of the utility model is to provide a heat dissipation protection device and a grid-connected test platform to solve the above technical problems.

[0006] In order to solve the above technical problems, the utility model provides a heat dissipation protection device, comprising:

[0007] Relay board, and

[0008] At least one set of temperature control modules is arranged on the relay board; wherein

[0009] The temperature control module includes: a contactor and a temperature switch;

[0010] The contactor is connected to the corresponding heat dissipation fan;

[0011] The temperature switch is connected to the contactor;

[0012] The contactor is adapted to control the start of the cooling fan according to a temperature, and the temperature switch is adapted to control the start of the cooling fan according to another temperature.

[0013] Further, the contactor is connected to the relay board.

[0014] Furthermore, the temperature switch is arranged in a wire groove of the external platform.

[0015] Furthermore, a temperature sampling circuit corresponding to the temperature control module is arranged on the relay board.

[0016] Furthermore, the temperature control module further comprises: an NTC temperature sampling line;

[0017] The NTC temperature sampling line corresponds to the temperature control module;

[0018] The NTC temperature sampling line is connected to the temperature sampling circuit;

[0019] The NTC temperature sampling line is arranged in a wire groove of the external platform.

[0020] Furthermore, the temperature control module further comprises: a switching power supply;

[0021] The switching power supply is connected to the contactor and the temperature switch.

[0022] Furthermore, a buzzer is provided on the relay board.

[0023] Further, the relay board is connected to a display.

[0024] Furthermore, the relay board and the display are connected via RS485 communication.

[0025] On the other hand, the utility model also provides a grid-connected test platform using the above-mentioned heat dissipation protection device, comprising:

[0026] The device cabinet is provided with the relay board in the device cabinet, and the heat dissipation fan is provided in the wire slot.

[0027] The beneficial effect of the utility model is that the utility model uses a relay board and at least one group of temperature control modules arranged on the relay board; wherein the temperature control module includes: a contactor and a temperature switch; the contactor is connected to the corresponding cooling fan; the temperature switch is connected to the contactor; the contactor is suitable for controlling the start of the cooling fan according to the temperature, and the temperature switch is suitable for controlling the start of the cooling fan according to another temperature; the startup and heat dissipation of the cooling fan are realized by dual control according to the temperature, which reduces consumption and enhances the heat dissipation effect.

[0028] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a circuit diagram of a relay board in a heat dissipation protection device of the utility model;

[0032] Figure 2 It is a circuit diagram of the display of the utility model;

[0033] Figure 3 It is a circuit diagram of the switching power supply of the utility model;

[0034] Figure 4 It is a circuit diagram of the contactor of the utility model;

[0035] Figure 5 It is a circuit diagram of the heat dissipation fan of the utility model. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] like Figures 1 to 5 As shown, in at least one embodiment, a heat dissipation protection device is provided, comprising: a relay board, and at least one group of temperature control modules arranged on the relay board; wherein the temperature control module comprises: a contactor (KM) and a temperature switch (RT); the Nth contactor may be KMN, and the Nth temperature switch may be RTN; the contactor is connected to the corresponding heat dissipation fan (MF); the Nth heat dissipation fan may be MFN; the temperature switch is connected to the contactor; the contactor is suitable for controlling the start of the heat dissipation fan according to the temperature, and the temperature switch is suitable for controlling the start of the heat dissipation fan according to another temperature; the start-up heat dissipation of the heat dissipation fan is realized by dual control according to the temperature, which reduces the consumption and enhances the heat dissipation effect.

[0038] The temperature control module can be set according to the actual size of the grid-connected test platform. The larger the grid-connected test platform, the more temperature control modules can be set.

[0039] Under the first temperature condition, the contactor coil is directly controlled to be energized to supply power to the cooling fan to achieve the purpose of cooling the grid-connected test platform. Under the second temperature condition, the temperature switch is closed to make the contactor coil energized to supply power to the cooling fan to achieve the purpose of cooling the grid-connected test platform. The first temperature is lower than the second temperature. Under the first temperature condition, it can be judged that the temperature of the grid-connected test platform is too high and needs to be cooled. Under the second temperature condition, it can be judged that the temperature is about to reach the critical value and the grid-connected test platform needs to be forced to cool. At this time, the temperature switch triggers the forced start of the cooling fan for cooling. The temperature of each cable of the grid-connected test platform is detected in real time and displayed on the display. The cooling fan is started when the temperature is over-temperature to cool the cable. The power supply control of the cooling fan is controlled by both the temperature and the temperature control switch. Any fan that meets the conditions can be started. When the temperature reaches a certain set threshold, an audible alarm will be issued, which improves the safety of the grid-connected test platform and reduces the number of maintenance times of the grid-connected test platform.

[0040] The contactor is connected to the relay board; the contactor is connected to the heat dissipation fan; the contactor can control the power supply to the heat dissipation fan, and when the contactor is closed, the heat dissipation fan is powered on and starts to dissipate heat.

[0041] The temperature switch is arranged in the wire trough of the external platform. For example, a wire trough for laying cables is arranged on the grid-connected test platform; the temperature switch is connected to the contactor; the temperature switch can be a temperature triggered switch, which will automatically close when the temperature reaches a certain value, so that the contactor closes and the cooling fan is powered on, and the cooling fan is forcibly started by the temperature switch when the temperature is about to reach the critical value; the closing temperature of the temperature switch is lower than the critical temperature of the grid-connected test platform; the temperature switch is arranged in the wire trough and close to the cable so that it can be affected by the temperature in the wire trough in a timely and accurate manner, ensuring that the temperature switch is triggered as soon as the temperature in the wire trough is about to reach the critical value; by setting the temperature switch, it can be avoided that the cooling fan cannot be started according to the first temperature due to damage to the NTC temperature sampling line or other components, and the temperature continues to rise and exceed the critical temperature due to the failure to start the cooling fan.

[0042] The temperature control module also includes: an NTC temperature sampling line (NTC); the Nth NTC temperature sampling line is NTCN; a temperature sampling circuit corresponding to the temperature control module is arranged on the relay board; the NTC temperature sampling line is connected to the temperature sampling circuit on the relay board; the NTC temperature sampling line is arranged in an external platform wire slot; an output relay corresponding to the temperature control module is arranged on the relay board, the output relay (KA) is connected to the corresponding temperature control module, and the Nth output relay can be KAN; the NTC temperature sampling line is arranged in the wire slot to accurately detect the temperature in the wire slot; a processor can be arranged on the relay board, the detected temperature is received by the processor, and the corresponding contactor is controlled by the processor according to the temperature to close and open the corresponding cooling fan.

[0043] The temperature control module also includes: a switching power supply; the switching power supply is connected to the contactor and the temperature switch; the switching power supply can supply power to the contactor coil so that the contactor is closed to turn on the cooling fan; the switching power supply can be a 24V switching power supply.

[0044] A buzzer is provided on the relay board; when the temperature reaches the second temperature, that is, when the temperature switch is triggered, the buzzer is controlled to alarm. When the buzzer alarms, all cooling fans can be controlled to start cooling to prevent the excessive temperature in a certain wire slot from affecting the temperature in other wire slots.

[0045] The relay board is connected to a display; the display may be a liquid crystal display; the relay board and the display are connected via RS485 communication; the display may display the detected temperature in real time.

[0046] The display is embedded on the panel of the device cabinet, the contactor and relay board are placed in the device cabinet, the display and relay board are connected through RS485 communication, the NTC temperature sampling line is placed in the wire slot, the relay board collects the temperature in the wire slot through the NTC temperature sampling line and transmits it to the display in real time for display. When the first temperature is reached, the power supply contactor coil (i.e., the coil in the contactor that controls the contactor to be energized) is controlled to be energized to supply power to the cooling fan to achieve the purpose of cooling the grid-connected test platform. When the temperature continues to rise to the second temperature, the display value shows red, and the relay board buzzer sounds an alarm. The temperature switch is built into the wire slot. When the temperature reaches the second temperature, the temperature switch is closed, and the power supply contactor coil is energized to supply power to the cooling fan to achieve the purpose of cooling the test platform.

[0047] In at least one other embodiment, a grid-connected test platform using the above heat dissipation protection device is provided, comprising: a device cabinet, the relay board is arranged in the device cabinet, the heat dissipation fan is arranged in the wire slot. The display in the heat dissipation protection device is arranged on the panel of the device cabinet.

[0048] In summary, the utility model uses a relay board and at least one group of temperature control modules arranged on the relay board; wherein the temperature control module includes: a contactor and a temperature switch; the contactor is connected to the corresponding cooling fan; the temperature switch is connected to the contactor; the contactor is suitable for controlling the start of the cooling fan according to the temperature, and the temperature switch is suitable for controlling the start of the cooling fan according to another temperature; the startup and heat dissipation of the cooling fan are realized by dual control according to the temperature, which reduces consumption and enhances the heat dissipation effect.

[0049] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0050] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A heat dissipation protection device, characterized in that: include: Relay board, and At least one set of temperature control modules disposed on the relay board; in The temperature control module includes: a contactor and a temperature switch; The contactor is connected to the corresponding heat dissipation fan; The temperature switch is connected to the contactor; The contactor is adapted to control the start of the cooling fan according to a temperature, and the temperature switch is adapted to control the start of the cooling fan according to another temperature.

2. The heat dissipation protection device according to claim 1, characterized in that: The contactor is connected to the relay board.

3. The heat dissipation protection device according to claim 1, characterized in that: The temperature switch is arranged in the wire groove of the external platform.

4. The heat dissipation protection device according to claim 1, characterized in that: The relay board is provided with a temperature sampling circuit corresponding to the temperature control module.

5. The heat dissipation protection device according to claim 4, characterized in that: The temperature control module also includes: an NTC temperature sampling line; The NTC temperature sampling line corresponds to the temperature control module; The NTC temperature sampling line is connected to the temperature sampling circuit; The NTC temperature sampling line is arranged in a wire groove of the external platform.

6. The heat dissipation protection device according to claim 1, characterized in that: The temperature control module also includes: a switching power supply; The switching power supply is connected to the contactor and the temperature switch.

7. The heat dissipation protection device according to claim 1, characterized in that: A buzzer is arranged on the relay board.

8. The heat dissipation protection device according to claim 1, characterized in that: The relay board is connected to a display.

9. The heat dissipation protection device according to claim 8, characterized in that: The relay board is connected to the display via RS485 communication.

10. A grid-connected test platform using the heat dissipation protection device according to any one of claims 1 to 9, characterized in that: include: The device cabinet is provided with the relay board in the device cabinet, and the heat dissipation fan is provided in the wire slot.

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