Air cooling control system of main transformer

Abstract

The invention particularly relates to a cooling control system for a main transformer. The cooling control system comprises a direct-current power supply module, a three-phase power measurement module, an input module and a microcomputer control module, a cooling loop is arranged in the main transformer, and a fan is arranged in the cooling loop; the input end of the direct-current power supply module is in circuit connection with an external direct-current power supply, and the output end of the direct-current power supply module is respectively in circuit connection with the three-phase power measurement module, the input module and the microcomputer control module; the microcomputer control module is respectively in communication connection with the three-phase power measurement module and the input module; the three-phase electric power measurement module is used for collecting an electric signal of a fan power supply; the input module is used for collecting switching signals of a fan power supply; and the microcomputer control module is used for controlling the start and stop of the fan according to the electrical signal and the switching signal of the fan power supply in the fan automatic control mode. According to the main transformer cooling control system, stable and reliable monitoring of a main transformer cooling loop power supply is realized.

Description

Technical Field

[0001] The invention relates to the technical field of electrical control, and in particular to an air-cooling control system for a main transformer. Background Art

[0002] The cooling control system of large oil-immersed main transformers in the power system generally adopts PLC or secondary circuit wiring based on phase sequence relays. PLC and secondary circuit wiring mainly use phase sequence relays to determine whether the power supply of the cooling circuit of the main transformer is normal. Once the phase sequence relay fails, the main transformer will lose cooling and the output power of the main transformer will be reduced. The short life, high failure rate and poor reliability of phase sequence relays have become common problems in the power industry.

[0003] There are three main reasons for phase sequence relay failure. First, it is affected by surge voltage or instantaneous peak voltage in the cooling circuit power supply of the main transformer. Second, it is affected by the high temperature and high humidity outdoor environment in coastal areas. Third, there are many devices in the main transformer control cabinet, which are closely arranged and have no reasonable heat dissipation space.

[0004] Due to the lack of real-time power monitoring modules in air cooling control systems, there are currently two common approaches to phase sequence relay failures:

[0005] One is that if the unit fails during operation, the faulty phase sequence relay can be replaced by reducing the output power of the main transformer while ensuring that the temperature of the main transformer is controllable.

[0006] Second, in order to solve the problem of short life of phase sequence relays, a maintenance strategy for regular replacement of phase sequence relays was formulated.

[0007] In addition, in order to solve the problem of phase sequence relay failure, various alternative phase sequence relays have also been designed. However, in order to verify whether their performance meets the operating conditions of the nuclear power plant, online verification is required on the power operating main transformer. The verification test requires a lot of time cost and failure risk according to the nuclear power management process. Summary of the invention

[0008] The object of the present invention is to provide a main transformer cooling control system to solve the problem that the phase sequence relay of the existing main transformer air cooling control system frequently fails, resulting in the inability to stably and reliably monitor the main transformer cooling circuit power supply, and to achieve stable and reliable monitoring of the main transformer cooling circuit power supply.

[0009] In order to solve the above problems, the present invention provides the following technical solutions:

[0010] A main transformer cooling control system, wherein a cooling circuit is provided in the main transformer, and a fan is provided in the cooling circuit; the main transformer cooling control system comprises a DC power supply module, a three-phase power measurement module, an input module and a microcomputer control module; the input end of the DC power supply module is connected to an external DC power supply circuit, and the output end of the DC power supply module is respectively connected to the three-phase power measurement module, the input module and the microcomputer control module circuit; the microcomputer control module is respectively connected to the three-phase power measurement module and the input module for communication;

[0011] A three-phase power measurement module, connected to the power supply of the fan, for collecting the electrical signal of the fan power supply and sending it to the microcomputer control module;

[0012] An input module is connected to the switch of the fan power supply and is used to collect the switch signal of the fan power supply and send it to the microcomputer control module;

[0013] The microcomputer control module is used to receive the electrical signal of the fan power supply sent by the three-phase power measurement module and the switch signal of the fan power supply sent by the input module; in the fan automatic control mode, the start and stop of the fan are controlled according to the electrical signal and the switch signal of the fan power supply.

[0014] As one of the possible implementations, the three-phase power measurement module is connected to the power supply of the fan through an external current transformer measurement loop.

[0015] As one of the achievable methods, a control cabinet is provided in the main transformer, and an air conditioner is provided in the control cabinet; the main transformer cooling control system also includes an air conditioner control module; the air conditioner control module is connected to the DC power supply module circuit;

[0016] The three-phase power measurement module is also connected to the power supply of the air conditioner and is also used to collect the electrical signal of the air conditioner power supply and send it to the microcomputer control module;

[0017] The input module is also connected to the switch of the air conditioner power supply and is used to collect the switch signal of the air conditioner power supply and send it to the microcomputer control module;

[0018] The microcomputer control module is also used to receive the electrical signal of the air-conditioning power supply sent by the three-phase power measurement module and the switch signal of the air-conditioning power supply sent by the input module; in the air-conditioning automatic control mode, the start and stop of the air-conditioning are controlled according to the electrical signal and the switch signal of the air-conditioning power supply;

[0019] The air conditioning control module sets the start and stop temperatures of the air conditioning and is used to collect the temperature inside the control cabinet; the temperature of the air conditioning is controlled according to the temperature inside the control cabinet.

[0020] As one of the possible implementations, the three-phase power measurement module is connected to the power supply of the air conditioner through an external current transformer measurement loop.

[0021] As one of the feasible ways, the air conditioning control module is connected to the microcomputer control module for communication; the air conditioning control module is also used to send the temperature in the control cabinet to the microcomputer control module; the microcomputer control module is also used to store the temperature in the control cabinet sent by the air conditioning control module.

[0022] As one of the achievable methods, the main transformer cooling control system further includes an output module and an execution module; the output module is respectively connected to the microcomputer control module and the execution module for communication; the output module and the execution module are respectively connected to the DC power supply module circuit; the AC input end of the execution module is connected to the external AC power supply circuit, the AC output end of the execution module is connected to the fan circuit, and a first circuit breaker is provided on the circuit connecting the execution module and the fan;

[0023] The microcomputer control module is also used to generate a first external AC power supply access instruction and send it to the execution module via the output module when the fan loses its working power supply;

[0024] The execution module is used to receive the first external AC power supply access instruction sent by the microcomputer control module via the output module; execute the first external AC power supply access instruction, close the first circuit breaker, and connect the external AC power supply to the fan.

[0025] As one of the achievable ways, the execution module is also connected to the air conditioning circuit, and a second circuit breaker is provided on the circuit connecting the execution module and the air conditioning;

[0026] The microcomputer control module is also used to generate a second external AC power supply access instruction and send it to the execution module via the output module when the air conditioner loses its working power supply;

[0027] The execution module is also used to receive the second external AC power access instruction sent by the microcomputer control module via the output module; execute the second external AC power access instruction, close the second circuit breaker, and connect the external AC power to the air conditioner.

[0028] As one of the achievable methods, the main transformer cooling control system further includes a display module and a manual control module; the display module and the manual control module are respectively connected to the microcomputer control module for communication; the display module and the manual control module are respectively connected to the DC power supply module circuit;

[0029] The display module is used to set the fan control mode, which includes the fan automatic control mode and the fan manual control mode; select the fan control mode; send the selected fan automatic control mode to the microcomputer control module, and send the selected fan manual control mode to the manual control module;

[0030] The microcomputer control module is also used to receive the fan automatic control mode sent by the display module; in the fan automatic control mode, the fan start and stop are controlled according to the electrical signal and the switch signal of the fan power supply;

[0031] The manual control module is hard-wired to the switch cable of the fan power supply and is used to receive the fan manual control mode sent by the display module; in the fan manual control mode, the fan is manually controlled to start and stop.

[0032] As one of the achievable methods, the display module is also used to set the air conditioning control mode, and the air conditioning control mode includes the air conditioning automatic control mode and the air conditioning manual control mode; select the air conditioning control mode; send the selected air conditioning automatic control mode to the microcomputer control module, and send the selected air conditioning manual control mode to the manual control module;

[0033] The microcomputer control module is also used to receive the air-conditioning automatic control mode sent by the display module; in the air-conditioning automatic control mode, the start and stop of the air-conditioning is controlled according to the electrical signal and the switch signal of the air-conditioning power supply;

[0034] The manual control module is also hard-wired to the switch cable of the air conditioner power supply, and is also used to receive the air conditioner manual control mode sent by the display module; in the air conditioner manual control mode, the start and stop of the air conditioner are manually controlled.

[0035] As one of the achievable ways, the microcomputer control module is also used to send the electrical signal and switch signal of the fan and the electrical signal and switch signal of the air conditioner to the display module;

[0036] The display module is also used to receive the electrical signal and switch signal of the fan and the electrical signal and switch signal of the air conditioner sent by the microcomputer control module; and display the electrical signal and switch signal of the fan and the electrical signal and switch signal of the air conditioner.

[0037] As one possible implementation, the display module is a touch screen display module.

[0038] As one of the achievable ways, the DC power supply module is connected to the external DC power supply via a DC power plug circuit; and the execution module is connected to the external AC power supply via an AC power connector circuit.

[0039] Beneficial technical effects of the present invention:

[0040] The main transformer cooling control system of the present invention has a simple structure. The three-phase power measurement module collects electrical signals of the air-conditioning power supply and the fan power supply, the input module collects switch signals of the air-conditioning power supply and the fan power supply, and the microcomputer control module can more accurately control the start and stop of the air-conditioning and the fan according to the electrical signals and switch signals of the air-conditioning power supply and the fan power supply; the display module sets the control mode of the fan and the air-conditioner, the microcomputer control module automatically controls the start and stop of the fan and the air-conditioner in the automatic control mode of the fan and the air-conditioner, and manually controls the start and stop of the fan and the air-conditioner in the manual control mode of the fan and the air-conditioner, thereby realizing automatic control and manual control of the fan and the air-conditioner; when the fan and the air-conditioner lose working power, the microcomputer control module connects the external AC power supply to the fan and the air-conditioner through the execution module, and the external AC power supply provides working power for the fan and the air-conditioner, thereby realizing emergency start of the fan and the air-conditioner; thereby ensuring the reliability of continuous operation of the main transformer cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of an embodiment of a main transformer cooling control system of the present invention. DETAILED DESCRIPTION

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0043] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] The technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0045] refer to Figure 1 , shows a schematic structural diagram of an embodiment of a main transformer cooling control system, wherein a cooling circuit is provided in the main transformer, and a fan is provided in the cooling circuit; the main transformer cooling control system comprises a DC power supply module, a three-phase power measurement module, an input module and a microcomputer control module;

[0046] The input end of the DC power supply module is connected to the external DC power supply circuit, and the output end of the DC power supply module is respectively connected to the three-phase power measurement module, the input module and the microcomputer control module circuit. The DC power supply module steps down the external DC power supply into the working power supply of the three-phase power measurement module, the input module and the microcomputer control module; the microcomputer control module is respectively connected to the three-phase power measurement module and the input module for communication;

[0047] A three-phase power measurement module, connected to the power supply of the fan, for collecting the electrical signal of the fan power supply and sending it to the microcomputer control module;

[0048] An input module is connected to the switch of the fan power supply and is used to collect the switch signal of the fan power supply and send it to the microcomputer control module;

[0049] The microcomputer control module is used to receive the electrical signal of the fan power supply sent by the three-phase power measurement module and the switch signal of the fan power supply sent by the input module; in the fan automatic control mode, the fan start and stop are controlled according to the electrical signal and the switch signal of the fan power supply; the electrical signal of the fan power supply includes the voltage, current, power and frequency of the fan power supply.

[0050] In this embodiment, as one of the achievable ways, the three-phase power measurement module is connected to the power supply of the fan through an external current transformer measurement loop.

[0051] In this embodiment, as one of the achievable methods, a control cabinet is provided in the main transformer, and an air conditioner is provided in the control cabinet; the main transformer cooling control system also includes an air conditioner control module; the air conditioner control module is connected to the DC power supply module circuit, and the DC power supply module steps down the external DC power supply into a working power supply for the air conditioner control module;

[0052] The three-phase power measurement module is also connected to the power supply of the air conditioner and is also used to collect the electrical signal of the air conditioner power supply and send it to the microcomputer control module;

[0053] The input module is also connected to the switch of the air conditioner power supply and is used to collect the switch signal of the air conditioner power supply and send it to the microcomputer control module;

[0054] The microcomputer control module is also used to receive the electrical signal of the air-conditioning power supply sent by the three-phase power measurement module and the switch signal of the air-conditioning power supply sent by the input module; in the air-conditioning automatic control mode, the start and stop of the air-conditioning is controlled according to the electrical signal and the switch signal of the air-conditioning power supply; the electrical quantity of the air-conditioning power supply includes the voltage, current, power and frequency of the air-conditioning power supply;

[0055] The air conditioning control module sets the start and stop temperatures of the air conditioning and is used to collect the temperature inside the control cabinet; the temperature of the air conditioning is controlled according to the temperature inside the control cabinet.

[0056] In this embodiment, as one of the achievable ways, the three-phase power measurement module is connected to the power supply of the air conditioner through an external current transformer measurement loop.

[0057] In this embodiment, as one of the feasible methods, the air conditioning control module is communicatively connected with the microcomputer control module; the air conditioning control module is also used to send the temperature inside the control cabinet to the microcomputer control module; the microcomputer control module is also used to store the temperature inside the control cabinet sent by the air conditioning control module.

[0058] In this embodiment, as one of the achievable modes, the main transformer cooling control system further includes an output module and an execution module; the output module is respectively connected to the microcomputer control module and the execution module in communication; the output module and the execution module are respectively connected to the DC power supply module circuit, and the DC power supply module steps down the external DC power supply into the working power supply of the output module and the execution module; the AC input end of the execution module is connected to the external AC power supply circuit, the AC output end of the execution module is connected to the fan circuit, and the circuit connecting the execution module and the fan is provided with a first circuit breaker;

[0059] The microcomputer control module is also used to generate a first external AC power supply access instruction and send it to the execution module via the output module when the fan loses its working power supply;

[0060] The execution module is used to receive the first external AC power access instruction sent by the microcomputer control module via the output module; execute the first external AC power access instruction, close the first circuit breaker, connect the external AC power to the fan, and the external AC power provides working power for the fan.

[0061] In this embodiment, as one of the achievable methods, the execution module is also connected to the air conditioning circuit, and a second circuit breaker is provided on the circuit connecting the execution module and the air conditioning;

[0062] The microcomputer control module is also used to generate a second external AC power supply access instruction and send it to the execution module via the output module when the air conditioner loses its working power supply;

[0063] The execution module is also used to receive the second external AC power access instruction sent by the microcomputer control module via the output module; execute the second external AC power access instruction, close the second circuit breaker, connect the external AC power to the air conditioner, and the external AC power provides working power for the air conditioner.

[0064] In this embodiment, as one of the achievable methods, the main transformer cooling control system further includes a display module and a manual control module; the display module and the manual control module are respectively connected to the microcomputer control module for communication; the display module and the manual control module are respectively connected to the DC power supply module circuit, and the DC power supply module steps down the external DC power supply into the working power supply of the display module and the manual control module;

[0065] The display module is used to set the fan control mode, which includes the fan automatic control mode and the fan manual control mode; select the fan control mode; send the selected fan automatic control mode to the microcomputer control module, and send the selected fan manual control mode to the manual control module;

[0066] The microcomputer control module is also used to receive the fan automatic control mode sent by the display module; in the fan automatic control mode, the fan start and stop are controlled according to the electrical signal and the switch signal of the fan power supply;

[0067] The manual control module is hard-wired to the switch cable of the fan power supply and is used to receive the fan manual control mode sent by the display module; in the fan manual control mode, the fan is manually controlled to start and stop.

[0068] In the event of a failure in the microcomputer control module, the fan manual control mode can be selected through the display module, and the fan start and stop can be manually controlled in conjunction with the manual control module.

[0069] In this embodiment, as one of the achievable methods, the display module is also used to set the air conditioning control mode, and the air conditioning control mode includes an air conditioning automatic control mode and an air conditioning manual control mode; select the air conditioning control mode; send the selected air conditioning automatic control mode to the microcomputer control module, and send the selected air conditioning manual control mode to the manual control module;

[0070] The microcomputer control module is also used to receive the air-conditioning automatic control mode sent by the display module; in the air-conditioning automatic control mode, the start and stop of the air-conditioning is controlled according to the electrical signal and the switch signal of the air-conditioning power supply;

[0071] The manual control module is also hard-wired to the switch cable of the air conditioner power supply, and is also used to receive the air conditioner manual control mode sent by the display module; in the air conditioner manual control mode, the start and stop of the air conditioner are manually controlled.

[0072] In the event of a failure in the microcomputer control module, the air conditioning manual control mode can be selected through the display module, and the air conditioning can be started and stopped manually in conjunction with the manual control module.

[0073] In this embodiment, as one of the achievable ways, the microcomputer control module is also used to send the electrical signal and switch signal of the fan and the electrical signal and switch signal of the air conditioner to the display module;

[0074] The display module is also used to receive the electrical signals and switch signals of the fan and the electrical signals and switch signals of the air conditioner sent by the microcomputer control module; and display the electrical signals and switch signals of the fan and the electrical signals and switch signals of the air conditioner to facilitate subsequent accident analysis.

[0075] In this embodiment, as one of the implementable manners, the display module is a touch screen display module.

[0076] In this embodiment, as one of the feasible ways, the DC power supply module is connected to the external DC power supply via a DC power plug circuit; and the execution module is connected to the external AC power supply via an AC power connector circuit.

[0077] In this embodiment, as one of the feasible ways, the working power provided by the DC power supply module for the main transformer cooling control system is a high-voltage isolated 24V switching power supply, the EMC electromagnetic compatibility complies with the relevant standards, various anti-interference capabilities are strong, and the reliability is greatly improved.

[0078] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A main transformer cooling control system, characterized in that: A cooling circuit is provided in the main transformer, and a fan is provided in the cooling circuit; the main transformer cooling control system includes a DC power supply module, a three-phase power measurement module, an input module and a microcomputer control module; the input end of the DC power supply module is connected to an external DC power supply circuit, and the output end of the DC power supply module is respectively connected to the three-phase power measurement module, the input module and the microcomputer control module circuit; the microcomputer control module is respectively connected to the three-phase power measurement module and the input module for communication; A three-phase power measurement module, connected to the power supply of the fan, for collecting the electrical signal of the fan power supply and sending it to the microcomputer control module; An input module is connected to the switch of the fan power supply and is used to collect the switch signal of the fan power supply and send it to the microcomputer control module; The microcomputer control module is used to receive the electrical signal of the fan power supply sent by the three-phase power measurement module and the switch signal of the fan power supply sent by the input module; in the fan automatic control mode, the start and stop of the fan are controlled according to the electrical signal and the switch signal of the fan power supply.

2. The main transformer cooling control system according to claim 1, characterized in that: The three-phase power measurement module is connected to the power supply of the fan through an external current transformer measurement loop.

3. The main transformer cooling control system according to claim 1, characterized in that: A control cabinet is provided in the main transformer, and an air conditioner is provided in the control cabinet; the main transformer cooling control system also includes an air conditioner control module; the air conditioner control module is connected to the DC power supply module circuit; The three-phase power measurement module is also connected to the power supply of the air conditioner and is also used to collect the electrical signal of the air conditioner power supply and send it to the microcomputer control module; The input module is also connected to the switch of the air conditioner power supply and is also used to collect the switch signal of the air conditioner power supply and send it to the microcomputer control module; The microcomputer control module is also used to receive the electrical signal of the air-conditioning power supply sent by the three-phase power measurement module and the switch signal of the air-conditioning power supply sent by the input module; in the air-conditioning automatic control mode, the start and stop of the air-conditioning are controlled according to the electrical signal and the switch signal of the air-conditioning power supply; The air conditioning control module sets the start and stop temperatures of the air conditioning and is used to collect the temperature inside the control cabinet; the temperature of the air conditioning is controlled according to the temperature inside the control cabinet.

4. The main transformer cooling control system according to claim 3, characterized in that: The three-phase power measurement module is connected to the power supply of the air conditioner through an external current transformer measurement loop.

5. The main transformer cooling control system according to claim 3, characterized in that: The air conditioning control module is connected to the microcomputer control module for communication; the air conditioning control module is also used to send the temperature in the control cabinet to the microcomputer control module; the microcomputer control module is also used to store the temperature in the control cabinet sent by the air conditioning control module.

6. The main transformer cooling control system according to claim 3, characterized in that: It also includes an output module and an execution module; the output module is respectively connected to the microcomputer control module and the execution module in communication; the output module and the execution module are respectively connected to the DC power supply module circuit; the AC input end of the execution module is connected to the external AC power supply circuit, the AC output end of the execution module is connected to the fan circuit, and a first circuit breaker is provided on the circuit connecting the execution module and the fan; The microcomputer control module is also used to generate a first external AC power supply access instruction and send it to the execution module via the output module when the fan loses its working power supply; The execution module is used to receive the first external AC power supply access instruction sent by the microcomputer control module via the output module; execute the first external AC power supply access instruction, close the first circuit breaker, and connect the external AC power supply to the fan.

7. The main transformer cooling control system according to claim 6, characterized in that: The execution module is also connected to the air conditioning circuit, and a second circuit breaker is provided on the circuit connecting the execution module and the air conditioning; The microcomputer control module is also used to generate a second external AC power supply access instruction and send it to the execution module via the output module when the air conditioner loses its working power supply; The execution module is also used to receive the second external AC power access instruction sent by the microcomputer control module via the output module; execute the second external AC power access instruction, close the second circuit breaker, and connect the external AC power to the air conditioner.

8. The main transformer cooling control system according to claim 7, characterized in that: It also includes a display module and a manual control module; the display module and the manual control module are respectively connected to the microcomputer control module for communication; the display module and the manual control module are respectively connected to the DC power supply module circuit; The display module is used to set the fan control mode, which includes the fan automatic control mode and the fan manual control mode; select the fan control mode; send the selected fan automatic control mode to the microcomputer control module, and send the selected fan manual control mode to the manual control module; The microcomputer control module is also used to receive the fan automatic control mode sent by the display module; in the fan automatic control mode, the fan start and stop are controlled according to the electrical signal and the switch signal of the fan power supply; The manual control module is hard-wired to the switch cable of the fan power supply and is used to receive the fan manual control mode sent by the display module; in the fan manual control mode, the fan is manually controlled to start and stop.

9. The main transformer cooling control system according to claim 8, characterized in that: The display module is also used to set the air conditioning control mode, which includes the air conditioning automatic control mode and the air conditioning manual control mode; select the air conditioning control mode; send the selected air conditioning automatic control mode to the microcomputer control module, and send the selected air conditioning manual control mode to the manual control module; The microcomputer control module is also used to receive the air-conditioning automatic control mode sent by the display module; in the air-conditioning automatic control mode, the start and stop of the air-conditioning is controlled according to the electrical signal and the switch signal of the air-conditioning power supply; The manual control module is also hard-wired to the switch cable of the air conditioner power supply, and is also used to receive the air conditioner manual control mode sent by the display module; in the air conditioner manual control mode, the start and stop of the air conditioner are manually controlled.

10. The main transformer cooling control system according to claim 8, characterized in that: The microcomputer control module is also used to send the electrical signal and switch signal of the fan and the electrical signal and switch signal of the air conditioner to the display module; The display module is also used to receive the electrical signal and switch signal of the fan and the electrical signal and switch signal of the air conditioner sent by the microcomputer control module; and display the electrical signal and switch signal of the fan and the electrical signal and switch signal of the air conditioner.

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