CN113945002B - Communication conversion circuit and air conditioner - Google Patents
Communication conversion circuit and air conditioner Download PDFInfo
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- CN113945002B CN113945002B CN202010693803.5A CN202010693803A CN113945002B CN 113945002 B CN113945002 B CN 113945002B CN 202010693803 A CN202010693803 A CN 202010693803A CN 113945002 B CN113945002 B CN 113945002B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention discloses a communication conversion circuit and an air conditioner, wherein the communication conversion circuit comprises a first switch unit, a second switch unit and a third switch unit, wherein the first switch unit is used for sending a first type of communication signal of a first type of indoor unit control unit to an outdoor unit control unit and sending a first outdoor unit communication signal of the outdoor unit control unit to the first communication unit; the indoor unit is used for sending the second type communication signals of the second type indoor unit control unit to the outdoor unit control unit and sending the second outdoor unit communication signals of the outdoor unit control unit to the second switch unit of the second communication unit, and the first switch unit and the second switch unit are arranged in the circuit to switch the two communication circuits, so that the indoor unit compatible with different communication circuits based on one outdoor unit is realized, and the cost is reduced.
Description
Technical Field
The present application relates to the field of air conditioner control, and more particularly, to a communication conversion circuit and an air conditioner.
Background
An AHU (Air handling unit ) air conditioner is a combined air conditioning unit that mainly extracts indoor air and a portion of fresh air to control outlet air temperature and volume and maintain indoor temperature.
Air duct type air conditioner is commonly called an air duct type air conditioner. The air conditioner is connected with an air pipe to supply air indoors, and is a small all-air system.
The air conditioner of the courtyard machine is also called as a ceiling machine or a ceiling type embedded air conditioner.
For the communication circuits of the indoor unit and the outdoor unit, the indoor unit of the AHU air conditioner is a first type of communication circuit based on unidirectional communication of the wire controller, and based on the first type of communication circuit, the outdoor unit can receive some types of unidirectional control signals sent by the wire controller, and the outdoor unit can also send other types of unidirectional control signals to the indoor unit; the indoor units of the air duct type air conditioner and the courtyard machine air conditioner are second-type communication circuits based on two-way communication of signal lines and zero lines, and the indoor units and the outdoor units can mutually send and receive signals. Because the two communication circuits are different, two different outdoor units are required to be designed to meet the requirements of the two communication circuits, and the production cost is increased.
Therefore, how to provide a communication conversion circuit compatible with two communication circuits is a technical problem to be solved at present.
Disclosure of Invention
The invention provides a communication conversion circuit which is used for solving the technical problem of high cost caused by the fact that two different communication circuits are adopted by an AHU air conditioner, an air pipe type air conditioner and a courtyard machine air conditioner in the prior art, and the two different outdoor units are needed to meet the requirements of the two communication circuits.
In some embodiments of the present application, the circuit comprises:
the first communication unit is used for sending the first type communication signals of the first type indoor unit control units to the first switch unit and receiving the first outdoor unit communication signals of the outdoor unit control units sent by the first switch unit;
the first switch unit is used for sending the first type of communication signals to the outdoor unit control unit and sending the first outdoor unit communication signals to the first communication unit;
the second communication unit is used for sending second type communication signals of the second type indoor unit control units to the second switch unit and receiving second outdoor unit communication signals of the outdoor unit control units sent by the second switch unit;
the second switch unit is configured to send the second type of communication signal to the outdoor unit control unit, and send the second outdoor unit communication signal to the second communication unit;
the fourth end of the first switch unit and the third end of the second switch unit are commonly connected with the first communication end of the outdoor unit control unit, the fifth end of the first switch unit and the fourth end of the second switch unit are commonly connected with the second communication end of the outdoor unit control unit, and the sixth end of the first switch unit is connected with the third communication end of the outdoor unit control unit.
In some embodiments of the present application, the first type of communication signal includes a four-way valve communication signal and a compressor communication signal, the first outdoor unit communication signal includes a defrost communication signal, and the first communication unit further includes:
the first transmission unit is used for transmitting the first type of communication signals and the first outdoor unit communication signals;
the four-way valve communication unit is used for receiving the four-way valve communication signal from the first transmission unit and sending the four-way valve communication signal to the first switch unit;
a compressor communication unit for receiving the compressor communication signal from the first transmission unit and transmitting the compressor communication signal to the first switching unit;
a defrosting communication unit for receiving the defrosting communication signal from the first switch unit and transmitting the defrosting communication signal to the first transmission unit;
the first output end of the first transmission unit is connected with the public end, the second output end of the first transmission unit is connected with the first end of the four-way valve communication unit, the second end of the four-way valve communication unit is connected with the first end of the first switch unit, the third output end of the first transmission unit is connected with the first end of the compressor communication unit, the second end of the compressor communication unit is connected with the second end of the first switch unit, the fourth output end of the first transmission unit is connected with the first end of the defrosting communication unit, the fifth output end of the first transmission unit is connected with the second end of the defrosting communication unit, and the third end of the defrosting communication unit is connected with the third end of the first switch unit.
In some embodiments of the present application, the first transmission unit further includes a wire controller, a first diode, a first resistor, a second diode, and a second resistor, wherein,
the first end of the wire controller is a first output end of the first transmission unit, the second end of the wire controller is connected with an anode of the first diode, a cathode of the first diode is connected with a first end of the first resistor, the second end of the first resistor is a second output end of the first transmission unit, a common joint point of a third end of the wire controller and the anode of the second diode is a fifth output end of the first transmission unit, the cathode of the second diode is connected with the first end of the second resistor, the second end of the second resistor is a third output end of the first transmission unit, and the fourth end of the wire controller is a fourth output end of the first transmission unit.
In some embodiments of the present application, the four-way valve communication unit further includes a third resistor, a third diode, a first optocoupler, a fourth resistor, a fifth resistor, and a first capacitor, wherein,
the first end of the third resistor is connected with the first end of the four-way valve communication unit, the common joint of the first end of the third resistor and the cathode of the third diode is connected with the anode of the light emitting diode of the first optocoupler, the common joint of the second end of the third resistor, the anode of the third diode and the cathode of the light emitting diode of the first optocoupler is connected with the common end, the collector of the phototriode of the first optocoupler and the first end of the fourth resistor are commonly connected with the first end of the fifth resistor, the second end of the fourth resistor is connected with a direct current power supply, the common joint of the second end of the fifth resistor and the first end of the first capacitor is the second end of the four-way valve communication unit, and the common joint of the emitter of the phototriode of the first optocoupler and the second end of the first capacitor is grounded.
In some embodiments of the present application, the compressor communication unit further includes a sixth resistor, a fourth diode, a second optocoupler, a seventh resistor, an eighth resistor, and a second capacitor, wherein,
the first end of the sixth resistor is connected with the first end of the compressor communication unit, the common point of the first end of the sixth resistor and the cathode of the fourth diode is connected with the anode of the light emitting diode of the second optocoupler, the common point of the second end of the sixth resistor, the anode of the fourth diode and the cathode of the light emitting diode of the second optocoupler is connected with the common end, the collector of the phototriode of the second optocoupler and the first end of the seventh resistor are commonly connected with the first end of the eighth resistor, the second end of the seventh resistor is connected with a direct current power supply, the common point of the second end of the eighth resistor and the first end of the second capacitor is the second end of the compressor communication unit, and the common point of the emitter of the phototriode of the second optocoupler and the second end of the second capacitor is grounded.
In some embodiments of the present application, the defrost communication unit further comprises a relay, a fifth diode, a switching transistor, a ninth resistor and a tenth resistor, wherein,
The first end of the switch of the relay is the first end of the defrosting communication unit, the second end of the switch of the relay is the second end of the defrosting communication unit, the first end of the coil of the relay and the anode of the fifth diode are commonly connected with the emitter of the switching triode, the second end of the coil of the relay is connected with the cathode of the fifth diode, the emitter of the switching triode is connected with the first end of the ninth resistor, the second end of the ninth resistor and the first end of the tenth resistor are commonly connected with the base of the switching triode, the second end of the tenth resistor is the third end of the defrosting communication unit, and the collector of the switching triode is grounded.
In some embodiments of the present application, the second communication unit further includes:
the second transmission unit is used for transmitting the second type of communication signals and the second outdoor unit communication signals;
a transmitting unit, configured to transmit the second type communication signal to the outdoor unit control unit;
the receiving unit is used for sending the received second outdoor unit communication signal to the second type indoor unit control unit;
the first end of the second transmission unit is connected with the signal line, the second end of the second transmission unit is connected with the zero line, the third end of the second transmission unit is connected with the first end of the sending unit, the fourth end of the second transmission unit is connected with the first end of the receiving unit, the second end of the sending unit is connected with the second end of the receiving unit, the third end of the sending unit is connected with the first end of the second switch unit, and the third end of the receiving unit is connected with the second end of the second switch unit.
In some embodiments of the present application, the second transmission unit further includes a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a sixth diode, and a seventh diode, wherein,
the first end of the third capacitor is connected with the first end of the second transmission unit, the second end of the third capacitor is connected with the second end of the second transmission unit, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth capacitor, the eleventh resistor and the seventh diode are connected in parallel between the signal line and the zero line, the twelfth resistor and the thirteenth resistor are connected in series between the first end of the second transmission unit and the anode of the sixth diode, the cathode of the sixth diode and the cathode of the seventh diode are connected with the third end of the second transmission unit in a sharing way, the anode of the seventh diode is connected with the fourth end of the second transmission unit, the twelfth resistor is a variable resistor, and the seventh diode is a voltage stabilizing diode.
In some embodiments of the present application, the transmitting unit further includes a third optocoupler, a fourteenth resistor, and a fifteenth resistor, wherein,
The collector electrode of the phototriode of the third optocoupler is the first end of the sending unit, the emitter electrode of the phototriode of the third optocoupler is the second end of the sending unit, the anode of the light emitting diode of the third optocoupler and the first end of the fourteenth resistor are commonly connected to the first end of the fifteenth resistor, the second end of the fifteenth resistor is the third end of the sending unit, and the common joint of the second end of the fourteenth resistor and the cathode of the light emitting diode of the third optocoupler is grounded;
the receiving unit further comprises a sixteenth resistor, a fourth optocoupler, a seventeenth resistor, an eighteenth resistor and a seventh capacitor, wherein,
the first end of the sixteenth resistor and the anode of the light emitting diode of the fourth optocoupler are commonly connected to the second end of the receiving unit, the second end of the sixteenth resistor and the cathode of the light emitting diode of the fourth optocoupler are commonly connected to the first end of the receiving unit, the collector of the phototransistor of the fourth optocoupler is connected with a direct current power supply, the emitter of the phototransistor of the fourth optocoupler and the first end of the seventeenth resistor are commonly connected to the first end of the eighteenth resistor, the second end of the eighteenth resistor and the first end of the seventh capacitor are commonly connected to the third end of the receiving unit, and the common junction of the second end of the seventeenth resistor and the second end of the seventh capacitor is grounded.
Corresponding to the communication conversion circuit in the embodiment of the present application, the embodiment of the present application further provides an air conditioner, including the communication conversion circuit as described above, further including:
a refrigerant circulation loop for circulating the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator, the four-way valve and the pressure reducer;
the compressor is used for compressing the low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharging the high-temperature high-pressure refrigerant gas to the condenser;
an outdoor heat exchanger and an indoor heat exchanger, wherein one of the two heat exchangers works as a condenser and the other works as an evaporator;
the four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between a condenser and an evaporator;
an indoor environment temperature sensor for detecting an indoor environment temperature;
and the indoor coil temperature sensor is used for detecting the indoor coil temperature.
By applying the technical scheme, the communication conversion circuit comprises a first communication unit, a second communication unit and a third communication unit, wherein the first communication unit is used for sending a first type of communication signal of a first type of indoor unit control unit to the first switch unit and receiving a first outdoor unit communication signal of an outdoor unit control unit sent by the first switch unit; the first switch unit is used for sending the first type communication signals to the outdoor unit control unit and sending the first outdoor unit communication signals to the first communication unit; the second communication unit is used for sending second type communication signals of the second type indoor unit control units to the second switch unit and receiving second outdoor unit communication signals of the outdoor unit control units sent by the second switch unit; the first switch unit and the second switch unit are arranged in the circuit to switch two communication circuits, so that the indoor unit compatible with different communication circuits based on one outdoor unit is realized, and the cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a circuit diagram showing an outline of a configuration of an air conditioner according to an embodiment.
Fig. 2 is a schematic diagram of a communication conversion circuit according to an embodiment of the invention.
Description of the reference numerals
1: an air conditioner; 2: an outdoor unit; 3: an indoor unit; 10: a refrigerant circuit; 11: a compressor; 12: a four-way valve; 13: an outdoor heat exchanger;
14: an expansion valve; 16: an indoor heat exchanger; 21: an outdoor fan; 31: an indoor fan; 32: an indoor temperature sensor; 33: an indoor heat exchanger temperature sensor.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
The air conditioner in this application performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to the air that has been conditioned and heat exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.
An outdoor unit of an air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, an indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater of a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler of a cooling mode.
Fig. 1 shows a circuit configuration of an air conditioner 1, and the air conditioner 1 includes a refrigerant circuit 10, and is capable of performing a vapor compression refrigeration cycle by circulating a refrigerant in the refrigerant circuit 10. The indoor unit 3 and the outdoor unit 2 are connected to each other by a connection pipe 4 to form a refrigerant circuit 10 through which a refrigerant circulates. The refrigerant circuit 10 includes a compressor 11, an outdoor heat exchanger 13, an expansion valve 14, a receiver 15, and an indoor heat exchanger 16. The indoor heat exchanger 16 and the outdoor heat exchanger 13, among others, function as a condenser or an evaporator. The compressor 11 sucks in refrigerant from the suction port, and discharges the refrigerant compressed therein to the indoor heat exchanger 16 from the discharge port. The compressor 11 is an inverter compressor of variable capacity that performs rotational speed control based on an inverter, and the four-way valve 12 switches between heating and cooling.
The outdoor heat exchanger 13 has a first inlet and outlet for passing the refrigerant between the outdoor heat exchanger and the suction port of the compressor 11 via the accumulator 15, and has a second inlet and outlet for passing the refrigerant between the outdoor heat exchanger and the expansion valve 14. The outdoor heat exchanger 13 exchanges heat between the outdoor air and the refrigerant flowing through a heat transfer tube (not shown) connected between the second inlet and the first inlet of the outdoor heat exchanger 13.
The expansion valve 14 is disposed between the outdoor heat exchanger 13 and the indoor heat exchanger 16. The expansion valve 14 has a function of expanding and decompressing the refrigerant flowing between the outdoor heat exchanger 13 and the indoor heat exchanger 16. The expansion valve 14 is configured to be capable of changing the opening degree, and the opening degree is reduced to increase the flow resistance of the refrigerant passing through the expansion valve 14, and the opening degree is increased to decrease the flow resistance of the refrigerant passing through the expansion valve 14. The expansion valve 14 expands and decompresses the refrigerant flowing from the indoor heat exchanger 16 to the outdoor heat exchanger 13 during the heating operation. Further, even if the state of other devices mounted in the refrigerant circuit 10 does not change, when the opening degree of the expansion valve 14 changes, the flow rate of the refrigerant flowing in the refrigerant circuit 10 changes.
The indoor heat exchanger 16 has a second inlet and outlet for allowing the liquid refrigerant to flow between the expansion valve 14 and a first inlet and outlet for allowing the gas refrigerant to flow between the gas refrigerant and the discharge port of the compressor 11. The indoor heat exchanger 16 exchanges heat between the indoor air and the refrigerant flowing through the heat transfer tube connected between the second inlet and the first inlet of the indoor heat exchanger 16.
A receiver 15 is disposed between the outdoor heat exchanger 13 and the suction port of the compressor 11. In the accumulator 15, the refrigerant flowing from the outdoor heat exchanger 13 to the compressor 11 is separated into a gas refrigerant and a liquid refrigerant. The gas refrigerant is mainly supplied from the accumulator 15 to the suction port of the compressor 11.
The outdoor unit 2 further includes an outdoor fan 21, and the outdoor fan 21 generates an airflow of the outdoor air passing through the outdoor heat exchanger 13 to promote heat exchange between the refrigerant flowing through the heat transfer tubes and the outdoor air. The outdoor fan 21 is driven by an outdoor fan motor 21A capable of changing the rotational speed. The indoor unit 3 further includes an indoor fan 31, and the indoor fan 31 generates an airflow of the indoor air passing through the indoor heat exchanger 16 to promote heat exchange between the indoor air and the refrigerant flowing through the heat transfer pipe. The indoor fan 31 is driven by an indoor fan motor 31A capable of changing the rotational speed.
As described in the background art, in the prior art, because the AHU air conditioner, the ducted air conditioner and the patio air conditioner adopt two different communication circuits, the requirements of the two communication circuits need to be satisfied based on two different outdoor units, which causes a technical problem of high cost.
In order to solve the above-mentioned problems, an embodiment of the present application provides a communication switching circuit, which includes a first switch unit configured to send a first type of communication signal of a first type of indoor unit control unit to an outdoor unit control unit, and send a first outdoor unit communication signal of the outdoor unit control unit to a first communication unit; the indoor unit is used for sending the second type communication signals of the second type indoor unit control unit to the outdoor unit control unit and sending the second outdoor unit communication signals of the outdoor unit control unit to the second switch unit of the second communication unit, and the first switch unit and the second switch unit are arranged in the circuit to switch the two communication circuits, so that the indoor unit compatible with different communication circuits based on one outdoor unit is realized, and the cost is reduced.
As shown in fig. 2, the communication conversion circuit includes:
the first communication unit 10 is configured to send a first type of communication signal of a first type of indoor unit control unit to the first switch unit 20, and receive a first outdoor unit communication signal of an outdoor unit control unit sent by the first switch unit 20;
the first switch unit 20 is configured to send the first type of communication signal to the outdoor unit control unit, and send the first outdoor unit communication signal to the first communication unit 10;
The second communication unit 30 is configured to send a second type communication signal of a second type indoor unit control unit to the second switch unit 40, and receive the second outdoor unit communication signal of the outdoor unit control unit sent by the second switch unit 40;
the second switch unit 40 is configured to send the second type of communication signal to the outdoor unit control unit, and send the second outdoor unit communication signal to the second communication unit 30;
the fourth end of the first switch unit 20 and the third end of the second switch unit 40 are commonly connected to the first communication end communication 1 of the outdoor unit control unit, the fifth end of the first switch unit 20 and the fourth end of the second switch unit 40 are commonly connected to the second communication end communication 2 of the outdoor unit control unit, and the sixth end of the first switch unit 20 is connected to the third communication end communication 3 of the outdoor unit control unit.
In a specific application scenario of the application, the first type of indoor unit control unit may be an indoor unit controller of an AHU air conditioner, the second type of indoor unit control unit may be an indoor unit controller of an air duct type air conditioner or a courtyard machine air conditioner, and the first switch unit and the second switch unit may be dial switches or other switches with switching functions.
In order to reliably process the first type of communication signal and the first outdoor unit communication signal, in a preferred embodiment of the present application, the first type of communication signal includes a four-way valve communication signal and a compressor communication signal, the first outdoor unit communication signal includes a defrost communication signal, and the first communication unit 10 further includes:
a first transmission unit 101, configured to transmit the first type communication signal and the first outdoor unit communication signal;
a four-way valve communication unit 102 for receiving the four-way valve communication signal from the first transmission unit 101 and transmitting the four-way valve communication signal to the first switching unit 20;
a compressor communication unit 103 for receiving the compressor communication signal from the first transmission unit 101 and transmitting the compressor communication signal to the first switching unit 20;
a defrost communication unit 104 for receiving the defrost communication signal from the first switch unit 20 and transmitting the defrost communication signal to the first transmission unit 101;
the first output end of the first transmission unit 101 is connected to a common end common, the second output end of the first transmission unit 101 is connected to the first end of the four-way valve communication unit 102, the second end of the four-way valve communication unit 102 is connected to the first end of the first switch unit 20, the third output end of the first transmission unit 101 is connected to the first end of the compressor communication unit 103, the second end of the compressor communication unit 103 is connected to the second end of the first switch unit 20, the fourth output end of the first transmission unit 101 is connected to the first end of the defrost communication unit 104, the fifth output end of the first transmission unit 101 is connected to the second end of the defrost communication unit 104, and the third end of the defrost communication unit 104 is connected to the third end of the first switch unit 20.
In order to reliably transmit the first type communication signal and the first outdoor unit communication signal, in the preferred embodiment of the present application, the first transmission unit 101 further includes a wire controller X, a first diode V1, a first resistor R1, a second diode V2 and a second resistor R2, wherein,
the first end of the wire controller X is the first output end of the first transmission unit 101, the second end of the wire controller X is connected with the anode of the first diode V1, the cathode of the first diode V1 is connected with the first end of the first resistor R1, the second end of the first resistor R1 is the second output end of the first transmission unit 101, the common point of the third end of the wire controller X and the anode of the second diode V2 is the fifth output end of the first transmission unit 101, the cathode of the second diode V2 is connected with the first end of the second resistor R2, the second end of the second resistor R2 is the third output end of the first transmission unit 101, and the fourth end of the wire controller X is the fourth output end of the first transmission unit 101.
In order to reliably control the four-way valve, in the preferred embodiment of the present application, the four-way valve communication unit 102 further includes a third resistor R3, a third diode V3, a first optocoupler B1, a fourth resistor R4, a fifth resistor R5, and a first capacitor C1, wherein,
The first end of the third resistor R3 is connected to the first end of the four-way valve communication unit 102, the common point between the first end of the third resistor R3 and the cathode of the third diode V3 is connected to the anode of the light emitting diode of the first optical coupler B1, the common point between the second end of the third resistor R3, the anode of the third diode V3 and the cathode of the light emitting diode of the first optical coupler B1 is connected to the common point common, the collector of the phototransistor of the first optical coupler B1 and the first end of the fourth resistor R4 are commonly connected to the first end of the fifth resistor R5, the second end of the fourth resistor R4 is connected to the dc power supply, and the common point between the second end of the fifth resistor R5 and the first end of the first capacitor C1 is the second end of the four-way valve communication unit 102, and the common point between the emitter of the phototransistor of the first optical coupler B1 and the second end of the first capacitor C1 is grounded.
For reliable control of the compressor, in a preferred embodiment of the present application, the compressor communication unit 103 further comprises a sixth resistor R6, a fourth diode V4, a second optocoupler B2, a seventh resistor R7, an eighth resistor R8 and a second capacitor C2, wherein,
the first end of the sixth resistor R6 is connected to the first end of the compressor communication unit 103, the common point between the first end of the sixth resistor R6 and the cathode of the fourth diode V4 is connected to the anode of the light emitting diode of the second optocoupler B2, the common point between the second end of the sixth resistor R6, the anode of the fourth diode V4 and the cathode of the light emitting diode of the second optocoupler B2 is connected to the common point common, the collector of the phototransistor of the second optocoupler B2 and the first end of the seventh resistor R7 are commonly connected to the first end of the eighth resistor R8, the second end of the seventh resistor R7 is connected to a dc power supply, and the common point between the second end of the eighth resistor R8 and the first end of the second capacitor C2 is the second end of the compressor communication unit 103, and the common point between the emitter of the phototransistor of the second optocoupler B2 and the second end of the second capacitor C2 is grounded.
For reliable defrosting, in the preferred embodiment of the present application, the defrost communication unit 104 further includes a relay K, a fifth diode V5, a switching transistor M, a ninth resistor R9 and a tenth resistor R10, wherein,
the first end of the switch of the relay K is the first end of the defrosting communication unit 104, the second end of the switch of the relay K is the second end of the defrosting communication unit 104, the first end of the coil of the relay K and the anode of the fifth diode V5 are commonly connected with the emitter of the switching triode M, the second end of the coil of the relay K is connected with the cathode of the fifth diode V5, the emitter of the switching triode M is connected with the first end of the ninth resistor R9, the second end of the ninth resistor R9 and the first end of the tenth resistor R10 are commonly connected with the base of the switching triode M, the second end of the tenth resistor R10 is the third end of the defrosting communication unit 104, and the collector of the switching triode M is grounded.
In order to reliably control the second type of communication signal and the second outdoor unit communication signal, in a preferred embodiment of the present application, the second communication unit 30 further includes:
a second transmission unit 301, configured to transmit the second type communication signal and the second outdoor unit communication signal;
A transmitting unit 302, configured to transmit the second type communication signal to the outdoor unit control unit;
a receiving unit 303, configured to send the received second outdoor unit communication signal to the second type indoor unit control unit;
the first end of the second transmission unit 301 is connected to the signal line SI, the second end of the second transmission unit 301 is connected to the zero line NIN, the third end of the second transmission unit 301 is connected to the first end of the transmitting unit 302, the fourth end of the second transmission unit 301 is connected to the first end of the receiving unit 303, the second end of the transmitting unit 302 is connected to the second end of the receiving unit 303, the third end of the transmitting unit 302 is connected to the first end of the second switching unit 40, and the third end of the receiving unit 303 is connected to the second end of the second switching unit 40.
In order to reliably transmit the second type communication signal and the second outdoor unit communication signal, the second transmission unit 301 further includes a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a sixth diode V6, and a seventh diode V7, wherein,
the first end of the third capacitor C3 is connected to the first end of the second transmission unit 301, the second end of the third capacitor C3 is connected to the second end of the second transmission unit 301, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, the eleventh resistor R11 and the seventh diode V7 are connected in parallel between the signal line SI and the zero line NIN, the twelfth resistor R12 and the thirteenth resistor R13 are connected in series between the first end of the second transmission unit 301 and the anode of the sixth diode V6, the cathode of the sixth diode V6 and the cathode of the seventh diode V7 are commonly connected to the third end of the second transmission unit 301, the anode of the seventh diode V7 is connected to the fourth end of the second transmission unit 301, the twelfth resistor R12 is a variable resistor, and the seventh diode V7 is a voltage regulator.
For reliable transmission of the second type of communication signal, in a preferred embodiment of the present application, the transmitting unit 302 further comprises a third optocoupler B3, a fourteenth resistor R14 and a fifteenth resistor R15, wherein,
the collector electrode of the phototransistor of the third optocoupler B3 is the first end of the transmitting unit 302, the emitter electrode of the phototransistor of the third optocoupler B3 is the second end of the transmitting unit 302, the anode of the light emitting diode of the third optocoupler B3 and the first end of the fourteenth resistor R14 are commonly connected to the first end of the fifteenth resistor R15, the second end of the fifteenth resistor R15 is the third end of the transmitting unit 302, and the common junction between the second end of the fourteenth resistor R14 and the cathode of the light emitting diode of the third optocoupler B3 is grounded. In a specific application scenario of the present application, the third terminal of the sending unit 302 may be a TXD interface.
In order to reliably receive the second outdoor unit communication signal, in a preferred embodiment of the present application, the receiving unit 302 further includes a sixteenth resistor R16, a fourth optocoupler B4, a seventeenth resistor R17, an eighteenth resistor R18, and a seventh capacitor C7, wherein,
the first end of the sixteenth resistor R16 and the anode of the light emitting diode of the fourth optocoupler B4 are commonly connected to the second end of the receiving unit 303, the second end of the sixteenth resistor R16 and the cathode of the light emitting diode of the fourth optocoupler B4 are commonly connected to the first end of the receiving unit 303, the collector of the phototransistor of the fourth optocoupler B4 is connected to a dc power supply, the emitter of the phototransistor of the fourth optocoupler B4 and the first end of the seventeenth resistor R17 are commonly connected to the first end of the eighteenth resistor R18, the second end of the eighteenth resistor R18 and the first end of the seventh capacitor C7 are commonly connected to the third end of the receiving unit 303, and the common contact between the second end of the seventeenth resistor R17 and the second end of the seventh capacitor C7 is grounded. In a specific application scenario of the present application, the third terminal of the receiving unit 303 may be an RXD interface.
By applying the technical scheme, the communication conversion circuit comprises a first communication unit, a second communication unit and a third communication unit, wherein the first communication unit is used for sending a first type of communication signal of a first type of indoor unit control unit to the first switch unit and receiving a first outdoor unit communication signal of an outdoor unit control unit sent by the first switch unit; the first switch unit is used for sending the first type communication signals to the outdoor unit control unit and sending the first outdoor unit communication signals to the first communication unit; the second communication unit is used for sending second type communication signals of the second type indoor unit control units to the second switch unit and receiving second outdoor unit communication signals of the outdoor unit control units sent by the second switch unit; the first switch unit and the second switch unit are arranged in the circuit to switch two communication circuits, so that the indoor unit compatible with different communication circuits based on one outdoor unit is realized, and the cost is reduced.
In order to further explain the technical idea of the invention, the technical scheme of the invention is described with specific application scenarios.
As shown in fig. 2, the wire controller X is a 24V power supply wire controller, uses four communication wires for unidirectional communication (unidirectional transmission of communication signals), and four pins of the wire controller X are mainly a W electric heating control signal, a Y compressor control signal, a B four-way valve control signal, and a C common terminal. The indoor unit controller sends a control signal to the outdoor unit through the line controller, and after the outdoor unit receives the control signal, the corresponding function is executed. The line controller is powered by a 24V power supply, and converts the power supply into a 5V communication signal through optical couplers B1 and B2, and sends the 5V communication signal to the outdoor unit control unit.
The second communication unit 30, which uses one signal line SI and a neutral line NIN of alternating current, transmits communication signals of the second type indoor unit control unit and the outdoor unit control unit to each other, has a power of 220V. And the communication circuit is a two-way communication (the indoor unit and the outdoor unit can send and receive signals to and from each other). Because the circuit and the alternating current use the same zero line, the communication signal is strong electricity, and is converted into a 5V communication signal through B3 and B4 and sent to the outdoor unit control unit or the second indoor unit control unit.
The first switch unit can be a dial switch A, the second switch unit can be a dial switch B, after the dial switch A is sucked, a line controller signal corresponding to a communication signal of an indoor unit of the AHU air conditioner can be transmitted to a communication 1 pin and a communication 2 pin of a control chip of the outdoor controller through the dial switch A, the control chip of the outdoor controller selects whether to open a four-way valve or not according to the communication signal, and whether to open a compressor or not, and meanwhile, the control chip of the outdoor unit controller sends a defrosting signal to the indoor unit of the AHU air conditioner through the communication 3 pin, so that a defrosting function is achieved.
After the dial switch B is sucked, communication signals of the indoor unit of the air pipe type air conditioner or the courtyard machine air conditioner can be transmitted to a communication 1 pin and a communication 2 pin of a control chip of the outdoor controller through the dial switch B, so that the outdoor unit can communicate with the indoor unit.
Due to the use of two dial switches, four conditions may occur, see table 1 in detail.
After the complete machine is electrified, the outdoor machine firstly detects whether the communication signal of the indoor unit of the AHU air conditioner is received, then further detects whether the communication signal of the indoor unit of the air duct type air conditioner or the courtyard machine air conditioner is received, and then judges the type of the indoor unit to execute the response function according to the table 1.
If during normal operation of the air conditioner, both the dial switch a and the dial switch B are engaged or both are disengaged due to device aging or other reasons, the outdoor opportunity performs a responsive operation according to table 1.
The communication signals can be identified and processed through the selection of the dial switch, so that the identification of one outdoor unit to different types of indoor units can be realized.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (6)
1. A communication conversion circuit, the circuit comprising:
the first communication unit is used for sending the first type communication signals of the first type indoor unit control units to the first switch unit and receiving the first outdoor unit communication signals of the outdoor unit control units sent by the first switch unit;
the first switch unit is used for sending the first type of communication signals to the outdoor unit control unit and sending the first outdoor unit communication signals to the first communication unit;
the second communication unit is used for sending the second type communication signals of the second type indoor unit control units to the second switch unit and receiving the second outdoor unit communication signals of the outdoor unit control units sent by the second switch unit;
the second switch unit is configured to send the second type of communication signal to the outdoor unit control unit, and send the second outdoor unit communication signal to the second communication unit;
the fourth end of the first switch unit and the third end of the second switch unit are commonly connected with the first communication end of the outdoor unit control unit, the fifth end of the first switch unit and the fourth end of the second switch unit are commonly connected with the second communication end of the outdoor unit control unit, and the sixth end of the first switch unit is connected with the third communication end of the outdoor unit control unit;
The first type communication signal comprises a four-way valve communication signal and a compressor communication signal, the first outdoor unit communication signal comprises a defrosting communication signal, and the first communication unit further comprises:
the first transmission unit is used for transmitting the first type of communication signals and the first outdoor unit communication signals;
the four-way valve communication unit is used for receiving the four-way valve communication signal from the first transmission unit and sending the four-way valve communication signal to the first switch unit;
a compressor communication unit for receiving the compressor communication signal from the first transmission unit and transmitting the compressor communication signal to the first switching unit;
a defrosting communication unit for receiving the defrosting communication signal from the first switch unit and transmitting the defrosting communication signal to the first transmission unit;
the first output end of the first transmission unit is connected with a common end, the second output end of the first transmission unit is connected with the first end of the four-way valve communication unit, the second end of the four-way valve communication unit is connected with the first end of the first switch unit, the third output end of the first transmission unit is connected with the first end of the compressor communication unit, the second end of the compressor communication unit is connected with the second end of the first switch unit, the fourth output end of the first transmission unit is connected with the first end of the defrosting communication unit, the fifth output end of the first transmission unit is connected with the second end of the defrosting communication unit, and the third end of the defrosting communication unit is connected with the third end of the first switch unit;
The second communication unit further includes:
the second transmission unit is used for transmitting the second type of communication signals and the second outdoor unit communication signals;
a transmitting unit, configured to transmit the second type communication signal to the outdoor unit control unit;
the receiving unit is used for sending the received second outdoor unit communication signal to the second type indoor unit control unit;
the first end of the second transmission unit is connected with a signal line, the second end of the second transmission unit is connected with a zero line, the third end of the second transmission unit is connected with the first end of the sending unit, the fourth end of the second transmission unit is connected with the first end of the receiving unit, the second end of the sending unit is connected with the second end of the receiving unit, the third end of the sending unit is connected with the first end of the second switch unit, and the third end of the receiving unit is connected with the second end of the second switch unit;
the second transmission unit further includes a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a sixth diode, and a seventh diode, wherein,
the first end of the third capacitor is connected with the first end of the second transmission unit, the second end of the third capacitor is connected with the second end of the second transmission unit, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth capacitor, the eleventh resistor and the seventh diode are connected in parallel between the signal line and the zero line, the twelfth resistor and the thirteenth resistor are connected in series between the first end of the second transmission unit and the anode of the sixth diode, the cathode of the sixth diode and the cathode of the seventh diode are connected with the third end of the second transmission unit in a sharing way, the anode of the seventh diode is connected with the fourth end of the second transmission unit, the twelfth resistor is a variable resistor, and the seventh diode is a voltage stabilizing diode;
The transmitting unit further comprises a third optocoupler, a fourteenth resistor and a fifteenth resistor, wherein,
the collector electrode of the phototriode of the third optocoupler is the first end of the sending unit, the emitter electrode of the phototriode of the third optocoupler is the second end of the sending unit, the anode of the light emitting diode of the third optocoupler and the first end of the fourteenth resistor are commonly connected to the first end of the fifteenth resistor, the second end of the fifteenth resistor is the third end of the sending unit, and the common joint of the second end of the fourteenth resistor and the cathode of the light emitting diode of the third optocoupler is grounded;
the receiving unit further comprises a sixteenth resistor, a fourth optocoupler, a seventeenth resistor, an eighteenth resistor and a seventh capacitor, wherein,
the first end of the sixteenth resistor and the anode of the light emitting diode of the fourth optocoupler are commonly connected to the second end of the receiving unit, the second end of the sixteenth resistor and the cathode of the light emitting diode of the fourth optocoupler are commonly connected to the first end of the receiving unit, the collector of the phototransistor of the fourth optocoupler is connected with a direct current power supply, the emitter of the phototransistor of the fourth optocoupler and the first end of the seventeenth resistor are commonly connected to the first end of the eighteenth resistor, the second end of the eighteenth resistor and the first end of the seventh capacitor are commonly connected to the third end of the receiving unit, and the common junction of the second end of the seventeenth resistor and the second end of the seventh capacitor is grounded.
2. The circuit of claim 1, wherein the first transmission unit further comprises a wire controller, a first diode, a first resistor, a second diode, and a second resistor, wherein,
the first end of the wire controller is a first output end of the first transmission unit, the second end of the wire controller is connected with an anode of the first diode, a cathode of the first diode is connected with a first end of the first resistor, the second end of the first resistor is a second output end of the first transmission unit, a common joint point of a third end of the wire controller and the anode of the second diode is a fifth output end of the first transmission unit, the cathode of the second diode is connected with the first end of the second resistor, the second end of the second resistor is a third output end of the first transmission unit, and the fourth end of the wire controller is a fourth output end of the first transmission unit.
3. The circuit of claim 1, wherein the four-way valve communication unit further comprises a third resistor, a third diode, a first optocoupler, a fourth resistor, a fifth resistor, and a first capacitor, wherein,
the first end of the third resistor is connected with the first end of the four-way valve communication unit, the common joint of the first end of the third resistor and the cathode of the third diode is connected with the anode of the light emitting diode of the first optocoupler, the common joint of the second end of the third resistor, the anode of the third diode and the cathode of the light emitting diode of the first optocoupler is connected with the common end, the collector of the phototriode of the first optocoupler and the first end of the fourth resistor are commonly connected with the first end of the fifth resistor, the second end of the fourth resistor is connected with a direct current power supply, the common joint of the second end of the fifth resistor and the first end of the first capacitor is the second end of the four-way valve communication unit, and the common joint of the emitter of the phototriode of the first optocoupler and the second end of the first capacitor is grounded.
4. The circuit of claim 1, wherein the compressor communication unit further comprises a sixth resistor, a fourth diode, a second optocoupler, a seventh resistor, an eighth resistor, and a second capacitor, wherein,
the first end of the sixth resistor is connected with the first end of the compressor communication unit, the common point of the first end of the sixth resistor and the cathode of the fourth diode is connected with the anode of the light emitting diode of the second optocoupler, the common point of the second end of the sixth resistor, the anode of the fourth diode and the cathode of the light emitting diode of the second optocoupler is connected with the common end, the collector of the phototriode of the second optocoupler and the first end of the seventh resistor are commonly connected with the first end of the eighth resistor, the second end of the seventh resistor is connected with a direct current power supply, the common point of the second end of the eighth resistor and the first end of the second capacitor is the second end of the compressor communication unit, and the common point of the emitter of the phototriode of the second optocoupler and the second end of the second capacitor is grounded.
5. The circuit of claim 1, wherein the defrost communication unit further comprises a relay, a fifth diode, a switching transistor, a ninth resistor, and a tenth resistor, wherein,
The first end of the switch of the relay is the first end of the defrosting communication unit, the second end of the switch of the relay is the second end of the defrosting communication unit, the first end of the coil of the relay and the anode of the fifth diode are commonly connected with the emitter of the switching triode, the second end of the coil of the relay is connected with the cathode of the fifth diode, the emitter of the switching triode is connected with the first end of the ninth resistor, the second end of the ninth resistor and the first end of the tenth resistor are commonly connected with the base of the switching triode, the second end of the tenth resistor is the third end of the defrosting communication unit, and the collector of the switching triode is grounded.
6. An air conditioner comprising the communication conversion circuit according to any one of claims 1 to 5, further comprising:
a refrigerant circulation loop for circulating the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator, the four-way valve and the pressure reducer;
the compressor is used for compressing the low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharging the high-temperature high-pressure refrigerant gas to the condenser;
an outdoor heat exchanger and an indoor heat exchanger, wherein one of the two heat exchangers works as a condenser and the other works as an evaporator;
The four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant circulation loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between a condenser and an evaporator;
an indoor environment temperature sensor for detecting an indoor environment temperature;
and the indoor coil temperature sensor is used for detecting the indoor coil temperature.
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|---|---|
| CN113945002A (en) | 2022-01-18 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No.1, Hisense Road, Nancun Town, Pingdu City, Qingdao City, Shandong Province 266700 Applicant after: Hisense Air Conditioning Co.,Ltd. Address before: No.1, Hisense Road, Nancun Town, Pingdu City, Qingdao City, Shandong Province 266700 Applicant before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd. |
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| GR01 | Patent grant |