Intelligent auxiliary circuit for air conditioner gateway

Abstract

The utility model discloses an intelligent auxiliary circuit for an air conditioner gateway, and belongs to the technical field of auxiliary power supplies. Comprising a transformer T1, the power supply input end of the transformer T1 is connected with commercial power, the power supply output end of the transformer T1 is connected with a voltage conversion unit, the power supply output end of the voltage conversion unit is connected with the power supply input end of an under-voltage protection unit, and the power supply output end of the under-voltage protection unit is connected with the power supply input end of a starting unit. The power supply output end of the voltage conversion unit is connected with the power supply input end of the starting unit, the power supply output end of the starting unit is connected with external equipment, the starting unit controls the external equipment to be started immediately or started in a delayed mode, and the starting unit is matched with the under-voltage protection unit to control the external equipment to operate stably. According to the utility model, the under-voltage protection unit provides a bias current greater than 5mA by taking a voltage stabilizing diode DVz as a reference, and is matched with the starting unit to control an external device to start immediately or start in a delayed manner, and is matched with the under-voltage protection unit to control the air-conditioning gateway to operate stably.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary power supplies, and in particular relates to an intelligent auxiliary circuit for an air-conditioning gateway. Background Art

[0002] The AC gateway receives the signal from the indoor unit and forwards it to the outdoor unit, ensuring efficient communication between the two. Since modern families may use air conditioners of different brands, it is particularly important for the AC gateway to support multiple brands.

[0003] Most existing air conditioning gateways use auxiliary power supplies. When the main power supply fails or is unstable, the auxiliary power supply can ensure the normal operation of the air conditioning gateway and avoid control interruption or equipment damage caused by power problems.

[0004] However, the auxiliary power supply used in the existing air conditioning gateway provides multiple power supply solutions to ensure high reliability and safety of the equipment. This design allows the gateway to automatically switch to the auxiliary power supply when the main power fails to ensure uninterrupted service, but the existing auxiliary power supply does not have a delay function. When the auxiliary power supply is powered, the air conditioning system is subjected to a sudden current shock, especially after the power is restored, causing key components such as the compressor to be damaged due to voltage mutation. Utility Model Content

[0005] Purpose of the utility model: to provide an intelligent auxiliary circuit for an air-conditioning gateway, which solves the above-mentioned problems existing in the prior art.

[0006] Technical solution: An intelligent auxiliary circuit for an air-conditioning gateway, comprising a transformer T1, wherein the power supply input end of the transformer T1 is connected to the mains, the power supply output end of the transformer T1 is connected to a voltage conversion unit, the power supply output end of the voltage conversion unit is connected to the power supply input end of an undervoltage protection unit, the power supply output end of the undervoltage protection unit is connected to the power supply input end of a starting unit, the power supply output end of the voltage conversion unit is connected to the power supply input end of the starting unit, the power supply output end of the starting unit is connected to an external device, the starting unit controls the external device to start immediately or delay starting, and cooperates with the undervoltage protection unit to control the external device to operate stably.

[0007] Preferably, the voltage conversion unit includes a diode D1, a diode D2, a diode D3, a diode D4, a voltage regulator IC1 and a capacitor C1, the positive electrode of the diode D1 is connected to pin 2 of the transformer T1, the negative electrode of the diode D1 is simultaneously connected to the negative electrode of the diode D2, the capacitor C1 and the pin 1 of the voltage regulator IC1, the positive electrode of the diode D2 is connected to pin 3 of the transformer T1, the negative electrode of the diode D3 is connected to pin 2 of the transformer T1, the positive electrode of the diode D3 is simultaneously connected to the positive electrode of the diode D4, the capacitor C1 and the pin 3 of the voltage regulator IC1, the pin 2 of the voltage regulator IC1 is connected to the undervoltage protection unit, and the diode D1, the diode D2, the diode D3 and the diode D4 form a bridge rectifier to adjust the voltage output by the transformer to a voltage of 22.5V.

[0008] Preferably, the diode D1, the diode D2, the diode D3 and the diode D4 are all 1N1005 diodes, and the voltage regulator IC1 is 7815 voltage regulator.

[0009] Preferably, the undervoltage protection unit includes a resistor R1, a resistor R2, a resistor R3, a potentiometer PR, a capacitor C3, a comparator IC2B and a voltage regulator diode DVz, the resistor R1, the resistor R2 and the potentiometer PR are connected in series, one end of the resistor R1 is connected to the cathode of the diode D2, one end of the resistor R2 is connected to the anode of the diode D4, the moving end of the potentiometer PR is connected to one end of the capacitor C3 and the pin 2 of the comparator IC2B, the other end of the capacitor C3 is simultaneously connected to the cathode of the voltage regulator diode DVz, the resistor R3 and the pin 1 of the comparator IC2B, the anode of the voltage regulator diode DVz is connected to the capacitor C1 and grounded, the other end of the resistor R3 is connected to the pin 2 of the voltage regulator IC1, and the pin 3 of the comparator IC2B is connected to the resistor R4.

[0010] Preferably, the starting unit includes a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C4, a comparator IC2A, a transistor VT and an optocoupler diode OP, the other end of the resistor R4 is connected to the base of the transistor VT, the collector of the transistor VT is simultaneously connected to the resistor R5, the capacitor C4 and the pin 2 of the comparator IC2A, the emitter of the transistor VT is simultaneously connected to the capacitor C4, the resistor R7 and the pin 5 of the comparator IC2A, the other end of the resistor R5 is connected to the resistor R3, the other end of the resistor R7 is simultaneously connected to the pin 1 of the comparator IC2A, the resistor R8 and the resistor R6, the other end of the resistor R6 is simultaneously connected to the resistor R5, the pin 4 of the comparator IC2A and the optocoupler diode OP, the other end of the resistor R8 is connected to the pin 3 of the comparator IC2A and the resistor R9, and the other end of the resistor R9 is connected to the optocoupler diode OP.

[0011] Preferably, the comparator IC2A and the comparator IC2B are both LM385 comparators, and the transistor VT is an NPN transistor.

[0012] Preferably, the transformer T1 is a multi-winding special transformer.

[0013] Beneficial effects: The utility model relates to an intelligent auxiliary circuit for an air-conditioning gateway. Under the action of transformer T1, the connected AC power is converted into a 20V AC voltage, and under the action of a voltage conversion unit, the 20V AC voltage is converted into a 22.5V DC stable voltage. During the voltage conversion process, the undervoltage protection unit uses the voltage regulator diode DVz as a reference to provide a bias current greater than 5mA, cooperates with the starting unit to control the immediate or delayed start of the external device, and cooperates with the undervoltage protection unit to control the stable operation of the air-conditioning gateway. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the auxiliary power supply circuit diagram of the utility model. DETAILED DESCRIPTION

[0015] like Figure 1 As shown, the utility model provides a technical solution: an intelligent auxiliary circuit for an air-conditioning gateway, comprising a transformer T1, wherein the transformer T1 adopts a multi-winding special transformer, the power supply input end of the transformer T1 is connected to the mains, and the connected mains 220V is reduced to an AC voltage of 20V through the transformer T1, the power supply output end of the transformer T1 is connected to a voltage conversion unit, and the 20V AC voltage is converted into a DC voltage of 22.5V through the voltage conversion unit, the power supply output end of the voltage conversion unit is connected to the power supply input end of the undervoltage protection unit, the power supply output end of the undervoltage protection unit is connected to the power supply input end of the starting unit, the power supply output end of the voltage conversion unit is connected to the power supply input end of the starting unit, the power supply output end of the starting unit is connected to an external device, the external device is controlled to start immediately or delay starting through the starting unit, and the air-conditioning gateway is controlled to run stably in cooperation with the undervoltage protection unit.

[0016] In a further embodiment, the voltage conversion unit includes a diode D1, a diode D2, a diode D3, a diode D4, a voltage regulator IC1 and a capacitor C1, wherein the diode D1, the diode D2, the diode D3 and the diode D4 are all 1N1005 type diodes, the voltage regulator IC1 is 7815 type voltage regulator, the positive electrode of the diode D1 is connected to the pin 2 of the transformer T1, the negative electrode of the diode D1 is simultaneously connected to the negative electrode of the diode D2, the capacitor C1 and the pin 1 of the voltage regulator IC1, the positive electrode of the diode D2 is connected to the transformer The cathode of the diode D3 is connected to the pin 2 of the transformer T1, the anode of the diode D3 is connected to the anode of the diode D4, the capacitor C1 and the pin 3 of the voltage regulator IC1, the pin 2 of the voltage regulator IC1 is connected to the undervoltage protection unit, the diode D1, the diode D2, the diode D3 and the diode D4 form a bridge rectifier to adjust the voltage output by the transformer to 22.5V, and the voltage regulator IC1 outputs a 15V DC stable voltage to complete the constant voltage output function, and uses the capacitor C1 for filtering to make the output 2000µF filter capacitor.

[0017] In a further embodiment, the undervoltage protection unit and the start-up unit include a resistor R1, a resistor R2, a resistor R3, a potentiometer PR, a capacitor C3, a comparator IC2B, a voltage stabilizing diode DVz, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C4, a comparator IC2A, a transistor VT and an optocoupler diode OP. The comparator IC2A and the comparator IC2B both use LM385 comparators, and the transistor VT uses an NPN transistor. The resistor R1, the resistor R2 and the potentiometer PR are connected in series, and one end of the resistor R1 is connected to a diode The cathode of the voltage regulator D2 is connected to the cathode of the voltage regulator D2, one end of the resistor R2 is connected to the anode of the diode D4, the movable end of the potentiometer PR is connected to one end of the capacitor C3 and the pin 2 of the comparator IC2B, the other end of the capacitor C3 is simultaneously connected to the cathode of the voltage regulator diode DVz, the resistor R3 and the pin 1 of the comparator IC2B, the anode of the voltage regulator diode DVz is connected to the capacitor C1 and grounded, the other end of the resistor R3 is connected to the pin 2 of the voltage regulator IC1, the other end of the resistor R4 is connected to the base of the transistor VT, the collector of the transistor VT is simultaneously connected to the resistor R5, the capacitor C4 and the pin 2 of the comparator IC2A, the transistor The emitter of VT is connected to capacitor C4, resistor R7 and pin 5 of comparator IC2A at the same time, the other end of the resistor R5 is connected to resistor R3, the other end of the resistor R7 is connected to pin 1 of comparator IC2A, resistor R8 and resistor R6 at the same time, the other end of the resistor R6 is connected to resistor R5, pin 4 of comparator IC2A and optocoupler diode OP at the same time, the other end of the resistor R8 is connected to pin 3 of comparator IC2A and resistor R9, the other end of the resistor R9 is connected to optocoupler diode OP, pin 3 of comparator IC2B is connected to resistor R4, and a bias voltage greater than 5 mA is provided through resistor R3. The current is set to ensure that the voltage-regulating diode DVz maintains a small dynamic resistance and temperature coefficient. The undervoltage point is adjusted by the potentiometer PR to operate at an input voltage of 147V. ​​When the input voltage is lower than 147V, the comparator IC2B outputs a high level, the transistor VT is saturated, and the voltage of the capacitor C4 is clamped to the ground potential. The comparator IC2A outputs a high level, and the control circuits of the comparators IC2A and IC2B are closed. When the input voltage exceeds 147V, the comparator IC2B flips and outputs a low level. The transistor VT is cut off and the delay is turned on. The delay time is determined by the resistor R5, the capacitor C4 and the comparator IC2A.

[0018] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. An intelligent auxiliary circuit for an air conditioning gateway, characterized in that: It includes a transformer T1, the power supply input end of the transformer T1 is connected to the mains, the power supply output end of the transformer T1 is connected to a voltage conversion unit, the power supply output end of the voltage conversion unit is connected to the power supply input end of the undervoltage protection unit, the power supply output end of the undervoltage protection unit is connected to the power supply input end of the starting unit, the power supply output end of the voltage conversion unit is connected to the power supply input end of the starting unit, the power supply output end of the starting unit is connected to an external device, the starting unit controls the external device to start immediately or delay starting, and cooperates with the undervoltage protection unit to control the air-conditioning gateway to operate stably.

2. The intelligent auxiliary circuit for air conditioning gateway according to claim 1, characterized in that: The voltage conversion unit includes a diode D1, a diode D2, a diode D3, a diode D4, a voltage regulator IC1 and a capacitor C1, the positive electrode of the diode D1 is connected to pin 2 of the transformer T1, the negative electrode of the diode D1 is simultaneously connected to the negative electrode of the diode D2, the capacitor C1 and the pin 1 of the voltage regulator IC1, the positive electrode of the diode D2 is connected to pin 3 of the transformer T1, the negative electrode of the diode D3 is connected to pin 2 of the transformer T1, the positive electrode of the diode D3 is simultaneously connected to the positive electrode of the diode D4, the capacitor C1 and the pin 3 of the voltage regulator IC1, the pin 2 of the voltage regulator IC1 is connected to the undervoltage protection unit, and the diode D1, the diode D2, the diode D3 and the diode D4 form a bridge rectifier to adjust the voltage output by the transformer to a voltage of 22.5V.

3. The intelligent auxiliary circuit for air conditioning gateway according to claim 2, characterized in that: The diode D1, the diode D2, the diode D3 and the diode D4 are all 1N1005 diodes, and the voltage regulator IC1 is 7815 voltage regulator.

4. The intelligent auxiliary circuit for air conditioning gateway according to claim 2, characterized in that: The undervoltage protection unit includes a resistor R1, a resistor R2, a resistor R3, a potentiometer PR, a capacitor C3, a comparator IC2B and a voltage regulator diode DVz. The resistor R1, the resistor R2 and the potentiometer PR are connected in series, one end of the resistor R1 is connected to the cathode of the diode D2, one end of the resistor R2 is connected to the anode of the diode D4, a moving end of the potentiometer PR is connected to one end of the capacitor C3 and a pin 2 of the comparator IC2B, the other end of the capacitor C3 is simultaneously connected to the cathode of the voltage regulator diode DVz, the resistor R3 and the pin 1 of the comparator IC2B, the anode of the voltage regulator diode DVz is connected to the capacitor C1 and grounded, the other end of the resistor R3 is connected to the pin 2 of the voltage regulator IC1, and the pin 3 of the comparator IC2B is connected to the resistor R4.

5. The intelligent auxiliary circuit for air conditioning gateway according to claim 4, characterized in that: The startup unit includes a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C4, a comparator IC2A, a transistor VT and an optocoupler diode OP, the other end of the resistor R4 is connected to the base of the transistor VT, the collector of the transistor VT is simultaneously connected to the resistor R5, the capacitor C4 and the pin 2 of the comparator IC2A, the emitter of the transistor VT is simultaneously connected to the capacitor C4, the resistor R7 and the pin 5 of the comparator IC2A, the other end of the resistor R5 is connected to the resistor R3, the other end of the resistor R7 is simultaneously connected to the pin 1 of the comparator IC2A, the resistor R8 and the resistor R6, the other end of the resistor R6 is simultaneously connected to the resistor R5, the pin 4 of the comparator IC2A and the optocoupler diode OP, the other end of the resistor R8 is connected to the pin 3 of the comparator IC2A and the resistor R9, and the other end of the resistor R9 is connected to the optocoupler diode OP.

6. The intelligent auxiliary circuit for air conditioning gateway according to claim 5, characterized in that: The comparator IC2A and the comparator IC2B are both LM385 comparators, and the transistor VT is an NPN transistor.

7. The intelligent auxiliary circuit for air conditioning gateway according to claim 1, characterized in that: The transformer T1 is a special transformer with multiple windings.

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