Composite electric control circuit of air conditioner outdoor unit
By adding a relay to the electrical control circuit of the air conditioner and controlling it to cut off the power supply during standby, the problem of power waste in the air conditioner during standby is solved, and the effect of saving electricity and extending the component life is achieved.
Patent Information
- Application Number
- CN202421544890.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-02
AI Technical Summary
In standby state, the power supply flows through the filter plate to the entire electronic control interior, causing the internal components to be charged, resulting in waste of energy and shortening the service life of the components.
A composite electronic control circuit of an air conditioner external unit is designed. By adding a relay to the circuit that powers the frequency converter board, the main control board controls the relay to cut off the power supply during standby time, to prevent the frequency converter board from being continuously charged.
It effectively reduces the power loss of the frequency converter board during standby time, saves electricity, improves energy utilization, and extends the service life of the components.
Smart Images
Figure CN222799177U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a power filter circuit technology for an air-conditioning unit, in particular to a composite electric control circuit for an air-conditioning outdoor unit. Background Art
[0002] With the development of technology and the needs of production and life, air conditioners are being used more and more widely. For an air conditioner, in addition to meeting the basic functional requirements of users for cooling and heating, how to achieve energy saving is also a topic of development in the current air conditioning industry. In the air conditioning network, when the air conditioner does not receive cooling or heating instructions, it is in standby mode. In this state, the standby energy consumption of the computer board inside the air conditioner is a waste.
[0003] The filter board of the existing three-phase electric air conditioner only plays a filtering role and has no power on / off control function. During the standby process, the power continues to flow through the filter board to the entire electric control, so that the internal components are always energized, especially the switching power supply on the inverter board substrate is always in a energized working state during the standby process, which not only increases the cost of using the air conditioner for users, but also causes energy waste. Moreover, the continuous energized operation of the components also greatly shortens the service life of the components. Utility Model Content
[0004] The utility model provides a composite electric control circuit for an air conditioner outdoor unit, so as to solve the problem of power waste and increased user cost caused by the continuous operation of the switch power supply part of the existing air conditioner.
[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme: an air conditioner outdoor unit composite electric control circuit, characterized in that it includes a main control board, a frequency conversion board, a filter board, a three-phase power supply, a filter board relay RL1, a filter board relay RL2, and a PTC resistor. The three-phase power supply is connected to the R, S, T, and N phases of the filter board, and the T and N phases of the filter board each separate a path connected to the power supply terminal CN1 of the main control board. The filter board relay RL1 is connected to the T phase and the output terminal T1 of the filter board. The relay port CN2 of the main control board is connected to the filter board relay RL1, and the filter board relay RL2 is connected to the S phase and the output terminal S1 of the filter board. The relay port CN3 of the inverter is connected to the filter board relay RL2, and the output ports R1, S1, and T1 of the filter board are connected to the frequency conversion board. The PTC resistor is connected in series with the filter board relay RL1, and the communication port CN4 of the main control board is connected to the communication port CN5 of the frequency conversion board.
[0006] Compared with the prior art, the beneficial effects of the utility model are as follows: a relay is added to the circuit for supplying power to the frequency conversion board, and the relay is controlled by the main control board. When in standby mode, the power supply to the frequency conversion board is cut off, thereby reducing the power loss of the frequency conversion board in standby mode, saving electric energy, and improving energy utilization; when the main control board receives the cooling and heating signals sent by the indoor unit, the main control board will send a line number to allow the RL1 relay on the filter board to be attracted and re-supply power to the frequency conversion board; the load capacity of the filter substrate used is large, with a maximum load current of 80A, ensuring the stability and reliability of the power supply. Conventionally, one filter board is equipped with one frequency conversion board, and the filter board of the patent can supply power to two frequency conversion substrates at the same time; a PTC resistor is integrated on the filter board to realize the pre-charging function of the electrolytic capacitor; the filter board relay RL1, the filter board relay RL2, and the PTC resistor of the patent can all be removed from the filter board and used as separate external devices. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 The utility model is a circuit diagram of a composite electric control circuit of an air conditioner outdoor unit. DETAILED DESCRIPTION
[0008] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.
[0009] See also Figure 1The utility model provides the following technical solutions: a composite electric control circuit for an air conditioner outdoor unit, comprising a main control board, a frequency conversion board, a filter board, a three-phase power supply, a filter board relay RL1, a filter board relay RL2, and a PTC resistor. The three-phase power supply is connected to the R, S, T, and N phases of the filter board. The T and N phases of the filter board each branch out a path connected to the power supply terminal CN1 of the main control board for supplying power to the main control board; the filter board relay RL1 is connected to the T phase and the output terminal T1 of the filter board, and the relay port CN2 of the main control board is connected to the filter board relay port CN1. The filter board relay RL1 is connected to the filter board relay RL1, and the filter board relay RL1 controls the disconnection and conduction of the filter board T phase to the frequency conversion board circuit; the filter board relay RL2 is connected to the filter board S phase and the output end S1, and the inverter relay port CN3 is connected to the filter board relay RL2, and the S phase and T phase circuits of the filter board are controlled by the filter board relay RL2; the PTC resistor is connected in series with the filter board relay RL1, and the communication port CN4 of the main control board is connected to the communication port CN5 of the frequency conversion board, which is used for the main control board and the frequency conversion board to establish communication. After the filter board is fully turned on, the three-phase power supply supplies power to the frequency conversion board through the output ports R1, S1, and T1 of the filter board. After the power supply of the frequency conversion board is fully connected, the frequency conversion board drives the compressor to operate according to the operation command issued by the main control board.
[0010] When the air conditioner is in standby mode, the relay port CN2 of the main control board of the outdoor unit stops outputting voltage signals. At this time, the filter board relay RL1 is in the disconnected state, the S-phase and T-phase circuits of the filter board are both in the disconnected state, no current flows through the frequency converter board, and the power loss is 0.
[0011] When the main control board of the outdoor unit receives the cooling and heating instructions from the indoor unit, the relay port CN2 of the main control board of the outdoor unit will output voltage, and the relay RL1 of the control filter board will be turned on. At this time, the T-phase current will flow through the PTC resistor and the R phase to form a loop, giving the inverter board a smaller working voltage to charge the capacitors and other devices inside the inverter board. After charging, the relay port CN3 of the inverter board will output a voltage signal, and the control filter board relay RL2 will change from the original port state to the pull-in state. At this time, the S and T phase power supplies are connected. After the S and T phase power supplies are connected, the three-phase power supplies of R, S, and T phases are all connected, realizing the normal power supply to the inverter board. The main control board and the inverter board establish communication through the communication ports CN4 and CN5. The main control board sends the compressor operation speed to the inverter board for cooling, and the inverter board controls the operation of the compressor.
[0012] When the user turns off the air conditioner, the main control board will send a compressor stop command to the inverter board through the communication port with the inverter board, and the inverter board will control the compressor to stop working. After the compressor stops running, the main control board will disconnect the voltage output of the relay port CN2, and the T-phase power supply will be disconnected. The inverter board will also stop the output of the relay port CN3. At this time, the filter board relay RL2 will change from the attracted state to the disconnected state again. At this time, the S-phase and T-phase power supplies entering the inverter board are completely disconnected, and no current flows through the inverter board, and the power loss is 0.
[0013] The above process allows the frequency converter to be powered on only when it is needed, avoiding the loss of electric power caused by the continuous power supply of the frequency converter during the standby process, effectively saving electric energy and improving the effective utilization rate of energy. As a preferred implementation of this embodiment, the main control board uses the chip model R5F5651CDDFB, and the frequency converter uses the chip model R5F71253N50FAV.
[0014] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A composite electric control circuit for an air conditioner outdoor unit, characterized in that: It includes a main control board, a frequency conversion board, a filter board, a three-phase power supply, a filter board relay RL1, a filter board relay RL2, and a PTC resistor. The three-phase power supply is connected to the R, S, T, and N phases of the filter board. The T and N phases of the filter board each branch out a path connected to the power supply terminal CN1 of the main control board. The filter board relay RL1 is connected to the T phase and the output terminal T1 of the filter board. The relay port CN2 of the main control board is connected to the filter board relay RL1, the filter board relay RL2 is connected to the S phase and the output terminal S1 of the filter board, the relay port CN3 of the frequency conversion board is connected to the filter board relay RL2, the output ports R1, S1, and T1 of the filter board are connected to the frequency conversion board, the PTC resistor is connected in series with the filter board relay RL1, and the communication port CN4 of the main control board is connected to the communication port CN5 of the frequency conversion board.