Relay control system between two heat sources

Abstract

The utility model relates to the technical field of whole house intelligence, in particular to a relay control system between two heat sources, which comprises a temperature controller, a gas furnace indoor unit, a heat pump outdoor unit and a relay device. Data ports of the temperature controller, the gas furnace indoor unit and the heat pump outdoor unit are electrically connected with the relay device respectively; the relay device is provided with a mode signal distribution module and used for receiving data signals of the temperature controller and feedback signals of the heat pump outdoor unit, and the data signals and the feedback signals are distributed to the gas furnace indoor unit and the heat pump outdoor unit through the mode signal distribution module. The problem that combination of mode signals received between two heat sources is abnormal due to signal line sharing is solved.

Description

Technical Field

[0001] This utility model relates to the field of whole-house smart technology, and in particular to a relay control system between two heat sources. Background Technology

[0002] In widely used whole-house smart systems (including functions such as cooling, heating, and defrosting), a dual-heat-source smart system (or air conditioning system) is mainly composed of a unitary heat pump air conditioner outdoor unit (the first heat source), an indoor heat exchanger, a gas furnace indoor unit (the second heat source), and a thermostat. In daily operation, the smart system requires the thermostat, heat pump outdoor unit (i.e., unitary heat pump air conditioner outdoor unit), and gas furnace indoor unit to work together to achieve the corresponding functions. For example, the heating function requires both the heat pump outdoor unit and the gas furnace indoor unit to simultaneously receive the heat pump output signal from the thermostat (i.e., ...). Figure 1 Only when Y1 and Y2 in the formula can they work together to complete the heat pump heating mode.

[0003] However, based on the current wiring methods of thermostats, heat pump outdoor units, and gas furnace indoor units, such as... Figure 1 As shown in the diagram (the thermostat is Themostat, the outdoor unit is the heat pump outdoor unit, the indoor unit is the gas furnace indoor unit, R / C is the power supply, G represents fan control, W1 and W2 represent two-stage auxiliary heating, Y1 and Y2 represent two-stage heat pump output, O represents switching between heating and cooling modes, and Dh is the dehumidification control signal (this signal is defined by the controller)), both the outdoor unit and the indoor unit share the thermostat's signal, making signal filtering and allocation impossible. Therefore, when the thermostat's output signal malfunctions, the operating commands received by the outdoor unit and the indoor unit will be mismatched. For example, in the original defrost mode, the gas furnace indoor unit receives the W signal and the heat pump outdoor unit receives the YW signal. However, due to a misconnection of the signal lines, the gas furnace indoor unit receives the YW signal and the heat pump outdoor unit receives the YW signal. As a result, the defrost mode cannot be executed, and instead, the gas furnace indoor unit and the heat pump outdoor unit operate simultaneously. At this time, the heat pump outdoor unit will be affected by the gas furnace indoor unit, leading to abnormally high condensing pressure. This may cause the system to frequently trigger high-pressure protection, which may have an adverse effect on the life of the compressor or cause damage. Utility Model Content

[0004] To address the aforementioned shortcomings, the purpose of this invention is to propose a relay control system between two heat sources, thereby resolving the problem of abnormal combination of received mode signals between the two heat sources due to shared signal lines.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A relay control system between two heat sources includes a thermostat, a gas furnace indoor unit, a heat pump outdoor unit, and a relay device; the data ports of the thermostat, the gas furnace indoor unit, and the heat pump outdoor unit are respectively electrically connected to the relay device;

[0007] The relay device is equipped with a mode signal distribution module. The relay device is used to receive the data signal from the thermostat and the feedback signal from the heat pump outdoor unit, and distribute them to the gas furnace indoor unit and the heat pump outdoor unit through the mode signal distribution module.

[0008] Furthermore, the relay device also includes a thermostat data conversion module, a gas furnace indoor unit data conversion module, and a heat pump outdoor unit data conversion module; the data port of the thermostat is electrically connected to the thermostat data conversion module, the thermostat data conversion module is electrically connected to the first input terminal of the mode signal distribution module and the gas furnace indoor unit data conversion module, the first output terminal of the mode signal distribution module is electrically connected to the gas furnace indoor unit data conversion module, the gas furnace indoor unit data conversion module is electrically connected to the data port of the gas furnace indoor unit, the heat pump outdoor unit data conversion module is electrically connected to the second input terminal and the second output terminal of the mode signal distribution module, and the heat pump outdoor unit data conversion module is electrically connected to the data port of the heat pump outdoor unit.

[0009] Furthermore, the data port of the temperature controller is provided with CN1-C terminal, CN1-G terminal, CN1-W1 terminal, CN1-W2 terminal, CN1-Y1 terminal, CN1-Y2 terminal and CN1-Dh terminal, and the temperature controller data conversion module is provided with a first data conversion circuit corresponding to the CN1-G terminal, the CN1-W1 terminal, the CN1-W2 terminal, the CN1-Y1 terminal, the CN1-Y2 terminal and the CN1-Dh terminal respectively;

[0010] The first data conversion circuit includes a bidirectional TVS diode TVS1, an optocoupler U4, a resistor R9, a capacitor E5, a resistor R8, and a capacitor C5; the bidirectional TVS diode TVS1 is connected in parallel between the anode and cathode of the light source of the optocoupler U4; the anode of the light source of the optocoupler U4 is electrically connected to the CN1-G terminal, the CN1-W1 terminal, the CN1-W2 terminal, the CN1-Y1 terminal, the CN1-Y2 terminal, or the CN1-Dh terminal; and the cathode of the light source of the optocoupler U4 is electrically connected to the CN1-C terminal.

[0011] The collector of the photodetector of the optocoupler U4 is connected to the power supply. The emitter of the photodetector of the optocoupler U4, one end of the resistor R9, the positive terminal of the capacitor E5, and one end of the resistor R8 are all electrically connected. The other end of the resistor R9, the negative terminal of the capacitor E5, and one end of the capacitor C5 are all grounded. After the other end of the resistor R8 and the other end of the capacitor C5 are electrically connected, they are electrically connected to the first input terminal of the mode signal distribution module or the data conversion module of the gas furnace indoor unit.

[0012] Furthermore, the data port of the heat pump outdoor unit is provided with CN3-C terminal, CN3-Y terminal and CN3-W terminal, and the heat pump outdoor unit data conversion module is provided with a second data conversion circuit and a third data conversion circuit corresponding to the CN3-Y terminal and the CN3-W terminal respectively;

[0013] The second data conversion circuit includes a thermistor PTC2, a silicon controlled rectifier optocoupler U17, a resistor R27, and a transistor Q6. The CN3-Y terminal is connected in series with the thermistor PTC2 and electrically connected to one end of the photodetector of the silicon controlled rectifier optocoupler U17. The other end of the photodetector of the silicon controlled rectifier optocoupler U17 and the anode of the light source of the silicon controlled rectifier optocoupler U17 are connected to the power supply. The cathode of the light source of the silicon controlled rectifier optocoupler U17 is connected in series with the resistor R27 and electrically connected to the collector of the transistor Q6. The emitter of the transistor Q6 is grounded, and the base of the transistor Q6 is electrically connected to the second output terminal of the mode signal distribution module.

[0014] The third data conversion circuit includes a bidirectional TVS diode TVS8, an optocoupler U16, a resistor R28, a capacitor E15, a resistor R26, and a capacitor C20; the bidirectional TVS diode TVS8 is connected in parallel between the anode and cathode of the light source of the optocoupler U16, the anode of the light source of the optocoupler U16 is electrically connected to the CN3-Y terminal, and the cathode of the light source of the optocoupler U16 is electrically connected to the CN3-C terminal;

[0015] The collector of the photodetector of the optocoupler U16 is connected to the power supply. The emitter of the photodetector of the optocoupler U16, one end of the resistor R28, the positive terminal of the capacitor E15, and one end of the resistor R26 are all electrically connected. The other end of the resistor R28, the negative terminal of the capacitor E15, and one end of the capacitor C20 are all grounded. After the other end of the resistor R26 and the other end of the capacitor C20 are electrically connected, they are electrically connected to the second input terminal of the mode signal distribution module.

[0016] Furthermore, the data port of the gas furnace indoor unit is provided with CN2-G terminal, CN2-W1 terminal, CN2-W2 terminal, CN2-Y1 terminal and CN2-Y2 terminal, the data conversion module of the gas furnace indoor unit is provided with a fourth data conversion circuit corresponding to the CN2-G terminal, the CN2-Y1 terminal and the CN2-Y2 terminal respectively, and the data conversion module of the gas furnace indoor unit is provided with a fifth data conversion circuit corresponding to the CN2-W1 terminal and the CN2-W2 terminal respectively;

[0017] The fourth data conversion circuit includes a thermistor PTC4, a silicon controlled rectifier optocoupler U7, a resistor R13, and a transistor Q1. The thermistor PTC4 is connected in series with either the CN2-G terminal, the CN2-Y1 terminal, or the CN2-Y2 terminal, and is electrically connected to one end of the photodetector of the silicon controlled rectifier optocoupler U7. The other end of the photodetector of the silicon controlled rectifier optocoupler U7 and the anode of the light source of the silicon controlled rectifier optocoupler U7 are connected to the power supply. The cathode of the light source of the silicon controlled rectifier optocoupler U7 is connected in series with the resistor R13 and is electrically connected to the collector of the transistor Q1. The emitter of the transistor Q1 is grounded, and the base of the transistor Q1 is electrically connected to the first output terminal of the mode signal distribution module.

[0018] The fifth data conversion circuit includes a thermistor PTC5, a relay RL1, a diode D1, a transistor Q2, and a capacitor C1. The thermistor PTC5 is connected in series with the CN2-W1 or CN2-W2 terminal, and then electrically connected to one end and the other end of the contact of the relay RL1. One end of the coil of the relay RL1 is electrically connected to the cathode of the diode D1 and then connected to a power supply. The other end of the coil of the relay RL1 and the anode of the diode D1 are both electrically connected to the collector of the transistor Q2. The emitter of the transistor Q2 is grounded. The capacitor C2 is connected in parallel between the base and emitter of the transistor Q2. The base of the transistor Q2 is electrically connected to the first output terminal of the mode signal distribution module or the first data conversion circuit corresponding to the CN1-W2 terminal.

[0019] Furthermore, the mode signal distribution module includes OR gates OR1, OR2, OR3, OR4, AND gates AND1, AND2, AND3, AND4, AND5, NOT gates NOT1, NOT2, and NOT3; the first input terminal of OR gate OR1 is used as the second input terminal of the mode signal distribution module; the input terminals of NOT gate NOT2, the first input terminal of OR gate OR2, the second input terminal of OR gate OR2, the second input terminal of OR gate OR3, the first input terminal of OR gate OR4, and the second input terminal of OR gate OR4 are all used as the first input terminals of the mode signal distribution module; the input terminal of NOT gate NOT1, the output terminal of AND gate AND1, the output terminal of AND gate AND2, and the output terminal of AND gate AND3 are all used as the first output terminals of the mode signal distribution module; the output terminal of AND gate AND4 is used as the second output terminal of the mode signal distribution module.

[0020] The input terminal of NOT gate NOT2 is electrically connected to the first data conversion circuit corresponding to the CN1-Dh terminal; the first input terminal of OR gate OR2 is electrically connected to the first data conversion circuit corresponding to the CN1-Y1 terminal; the second input terminal of OR gate OR2 is electrically connected to the first data conversion circuit corresponding to the CN1-Y2 terminal; the second input terminal of OR gate OR3 is electrically connected to the first data conversion circuit corresponding to the CN1-G terminal; the first input terminal of OR gate OR4 is electrically connected to the first data conversion circuit corresponding to the CN1-W1 terminal; and the second input terminal of OR gate OR4 is electrically connected to the first data conversion circuit corresponding to the CN1-W2 terminal.

[0021] The input terminal of NOT gate NOT1 is electrically connected to the fifth data conversion circuit corresponding to the CN2-W1 terminal; the output terminal of AND gate AND1 is electrically connected to the fourth data conversion circuit corresponding to the CN2-G terminal; the output terminal of AND gate AND2 is electrically connected to the fourth data conversion circuit corresponding to the CN2-Y2 terminal; and the output terminal of AND gate AND3 is electrically connected to the fourth data conversion circuit corresponding to the CN2-Y1 terminal.

[0022] The second input of OR gate OR1 is electrically connected to the output of OR gate OR4. The output of OR gate OR1 and the input of NOT gate NOT1 are both electrically connected to the input of NOT gate NOT3. The second input of OR gate OR2 is electrically connected to the second input of AND gate AND2. The output of OR gate OR2, the first input of OR gate OR3, and the second input of AND gate AND3 are all electrically connected to the first input of AND gate AND4. The output of OR gate OR3 is electrically connected to the second input of AND gate AND1. The first input of AND gate AND1 and the output of NOT gate NOT1 are both electrically connected to the second input of AND gate AND4. The first input of AND gate AND2 is electrically connected to the output of NOT gate NOT2. The output of AND gate AND2 is electrically connected to the first input of AND gate AND5. The first input of AND gate AND3 and the second input of AND gate AND5 are both electrically connected to the output of NOT gate NOT3.

[0023] Furthermore, the data port of the thermostat is also provided with a CN1-O terminal, the data port of the heat pump outdoor unit is also provided with a CN3-O terminal, and the relay device is also provided with a mode switching prompt module; the mode switching prompt module includes a bidirectional TVS diode TVS9, an optocoupler U18, a resistor R44, a capacitor E17, and a first prompt circuit.

[0024] The bidirectional TVS diode TVS9 is connected in parallel between the anode and cathode of the light source of the optocoupler U18. The CN1-O terminal and the CN3-O terminal are both electrically connected to the anode of the light source of the optocoupler U18, and the CN1-C terminal and the CN3-C terminal are both electrically connected to the cathode of the light source of the optocoupler U18.

[0025] The collector of the photodetector of the optocoupler U18 is connected to the power supply. The emitter of the photodetector of the optocoupler U4, one end of the resistor R44, and the positive terminal of the capacitor E17 are all electrically connected to the positive terminal of the first indication circuit. The other end of the resistor R44, the negative terminal of the capacitor E17, and the negative terminal of the first indication circuit are all grounded.

[0026] Furthermore, the first data conversion circuit also includes a second prompting circuit; the positive terminal of the second prompting circuit is electrically connected to the common junction of the emitter of the photodetector of the optocoupler U4, one end of the resistor R9, the positive terminal of the capacitor E5, and one end of the resistor R8, and the negative terminal of the second prompting circuit is grounded.

[0027] Furthermore, the second data conversion circuit also includes a third prompting circuit, and the third data conversion circuit also includes a fourth prompting circuit; the positive terminal of the third prompting circuit is electrically connected to the common connection point of the second data conversion circuit and the second output terminal of the mode signal distribution module, and the negative terminal of the third prompting circuit is grounded;

[0028] The positive terminal of the fourth prompting circuit is electrically connected to the common junction of the emitter of the photodetector of the optocoupler U16, one end of the resistor R28, the positive terminal of the capacitor E15, and one end of the resistor R26, while the negative terminal of the fourth prompting circuit is grounded.

[0029] Furthermore, the fourth data conversion circuit also includes a fifth prompting circuit, and the fifth data conversion circuit also includes a sixth prompting circuit; the positive terminal of the fifth prompting circuit is electrically connected to the common connection point of the first output terminal of the fourth data conversion circuit and the mode signal distribution module, and the negative terminal of the fifth prompting circuit is grounded;

[0030] The positive terminal of the sixth prompt circuit is electrically connected to the common connection point of the fifth data conversion circuit and the first output terminal of the mode signal distribution module, or electrically connected to the common connection point of the fifth data conversion circuit and the first data conversion circuit corresponding to the CN1-W2 terminal; the negative terminal of the sixth prompt circuit is grounded.

[0031] The technical solution provided by this utility model can include the following beneficial effects: After the relay device is provided, the data signals distributed (or allocated) by the thermostat to the indoor unit of the gas furnace and the outdoor unit of the heat pump will first pass through the relay device. At the same time, based on the working mode standard of the outdoor unit of the heat pump, its feedback data signal will also first pass through the relay device. Thus, the mode signal allocation module 44 (such as interlocking, clamping, logic judgment and other circuit structures) adjusts the data signal of the thermostat and the feedback signal of the outdoor unit of the heat pump (mainly playing a role in assisting confirmation) to generate specific mode signals (such as cooling mode data group, defrosting mode data group, heat pump heating mode data group, etc.), avoiding abnormal combination of mode signals caused by the sharing of signal lines. Finally, the adjusted mode signals are allocated to the indoor unit of the gas furnace and the outdoor unit of the heat pump, thereby ensuring that the indoor unit of the gas furnace and the outdoor unit of the heat pump each receive the correct control commands and work together to complete the correct operation of the corresponding mode, extending the service life of the indoor unit of the gas furnace and the outdoor unit of the heat pump. Attached Figure Description

[0032] Figure 1 This is a wiring diagram between the existing thermostat, the indoor unit of the gas furnace, and the outdoor unit of the heat pump.

[0033] Figure 2 This is a schematic diagram of a relay control system between two heat sources, which is one embodiment of this utility model.

[0034] Figure 3 Is it like this? Figure 2 The circuit diagram shown is of the temperature controller data conversion module.

[0035] Figure 4 Is it like this? Figure 2 The circuit diagram shown is for the data conversion module of the heat pump outdoor unit.

[0036] Figure 5 Is it like this? Figure 2 The circuit diagram shown is for the data conversion module of the indoor unit of the gas furnace.

[0037] Figure 6 Is it like this? Figure 2 The circuit diagram of the signal distribution module shown is shown.

[0038] Figure 7 Is it like this? Figure 2 The diagram shows the workflow of a refrigeration mode of a relay control system between two heat sources.

[0039] Figure 8 Is it like this? Figure 2 The diagram shows the workflow of a gas heating mode in a relay control system between two heat sources.

[0040] Figure 9 Is it like this? Figure 2 The diagram shows the workflow of a heat pump heating mode in a relay control system between two heat sources.

[0041] Figure 10 Is it like this? Figure 2 The diagram shows the workflow of a defrosting mode in a relay control system between two heat sources.

[0042] Figure 11 Is it like this? Figure 2 The circuit diagram shown is for the mode switching prompt module.

[0043] The circuit includes: thermostat 1, gas furnace indoor unit 2, heat pump outdoor unit 3, relay device 4, thermostat data conversion module 41, gas furnace indoor unit data conversion module 42, heat pump outdoor unit data conversion module 43, mode signal distribution module 44, first data conversion circuit 411, bidirectional TVS diode TVS1, optocoupler U4, resistor R9, capacitor E5, resistor R8, capacitor C5, second data conversion circuit 431, third data conversion circuit 432, thermistor PTC2, thyristor optocoupler U17, resistor R27, transistor Q6, bidirectional TVS diode TVS8, optocoupler U16, resistor R28, capacitor E15, resistor R26, capacitor C20, fourth data conversion circuit 421, and fifth data conversion circuit 42. 2. Thermistor PTC4, SCR optocoupler U7, resistor R13, transistor Q1, thermistor PTC5, relay RL1, diode D1, transistor Q2, capacitor C1, OR gate OR1, OR gate OR2, OR gate OR3, OR gate OR4, AND gate AND1, AND gate AND2, AND gate AND3, AND gate AND4, AND gate AND5, NOT gate NOT1, NOT gate NOT2, NOT gate NOT3, mode switching prompt module 45, bidirectional TVS diode TVS9, optocoupler U18, resistor R44, capacitor E17, first prompt circuit 451, second prompt circuit 4111, third prompt circuit 4311, fourth prompt circuit 4321, fifth prompt circuit 4211, sixth prompt circuit 4221. Detailed Implementation

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0045] In the description of embodiments of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0047] The following is combined with Figures 2 to 11 This describes a relay control system between two heat sources according to an embodiment of the present invention.

[0048] A relay control system between two heat sources includes a thermostat 1, a gas furnace indoor unit 2, a heat pump outdoor unit 3, and a relay device 4; the data ports of the thermostat 1, the gas furnace indoor unit 2, and the heat pump outdoor unit 3 are electrically connected to the relay device 4 respectively.

[0049] The relay device 4 is equipped with a mode signal distribution module 44. The relay device 4 is used to receive the data signal of the thermostat 1 and the feedback signal of the heat pump outdoor unit 3, and distribute them to the gas furnace indoor unit 2 and the heat pump outdoor unit 3 through the mode signal distribution module 44.

[0050] This utility model proposes a preferred embodiment of a relay control system between two heat sources, such as... Figure 2 As shown, with the relay device 4 installed, the data signals distributed (or allocated) by the thermostat 1 to the gas furnace indoor unit 2 and the heat pump outdoor unit 3 will first pass through the relay device 4. At the same time, based on the operating mode standard of the heat pump outdoor unit 3, its feedback data signal will also first pass through the relay device 4. Thus, the mode signal allocation module 44 (such as interlocking, clamping, logic judgment and other circuit structures) adjusts the data signal of the thermostat 1 and the feedback signal of the heat pump outdoor unit (mainly playing a role in assisting confirmation) to generate specific mode signals (such as cooling mode data group, defrosting mode data group, heat pump heating mode data group, etc.) to avoid abnormal combination of mode signals caused by the sharing of signal lines. Finally, the adjusted mode signals are allocated to the gas furnace indoor unit 2 and the heat pump outdoor unit 3, thereby ensuring that the gas furnace indoor unit 2 and the heat pump outdoor unit 3 each receive the correct control commands and work together to complete the correct operation of the corresponding mode, extending the service life of the gas furnace indoor unit 2 and the heat pump outdoor unit 3.

[0051] Furthermore, the relay device 4 is also equipped with a thermostat data conversion module 41, a gas furnace indoor unit data conversion module 42, and a heat pump outdoor unit data conversion module 43; the data port of the thermostat 1 is electrically connected to the thermostat data conversion module 41, the thermostat data conversion module 41 is electrically connected to the first input terminal of the mode signal distribution module 44 and the gas furnace indoor unit data conversion module 42, the first output terminal of the mode signal distribution module 44 is electrically connected to the gas furnace indoor unit data conversion module 42, the gas furnace indoor unit data conversion module 42 is electrically connected to the data port of the gas furnace indoor unit 2, the heat pump outdoor unit data conversion module 43 is electrically connected to the second input terminal and the second output terminal of the mode signal distribution module 44, and the heat pump outdoor unit data conversion module 43 is electrically connected to the data port of the heat pump outdoor unit 3.

[0052] In this embodiment, the mode signal allocation module 44 is used to receive the data signal from the thermostat 1 and the feedback signal from the heat pump outdoor unit 3 through the thermostat data conversion module 41 and the heat pump outdoor unit data conversion module 43, respectively, adjust and generate a specific mode signal, and allocate the mode signal to the gas furnace indoor unit data conversion module 42 and the heat pump outdoor unit data conversion module 43; the gas furnace indoor unit data conversion module 42 is used to receive the allocated mode signal and directly receive the data signal from the thermostat 1 from the thermostat data conversion module 41, and transmit it to the gas furnace indoor unit 2; the heat pump outdoor unit data conversion module 43 is used to receive the allocated mode signal and transmit it to the heat pump outdoor unit 3.

[0053] It can be seen that the relay device 4, in order to realize the signal adjustment function, consists of a thermostat data conversion module 41, a gas furnace indoor unit data conversion module 42, a heat pump outdoor unit data conversion module 43, and a mode signal distribution module 44. The thermostat data conversion module 41, the gas furnace indoor unit data conversion module 42, and the heat pump outdoor unit data conversion module 43 are all used to convert input signals and output signals for easy identification. The mode signal distribution module 44 adjusts the data signals of the thermostat 1 that may cause signal conflicts, in conjunction with the feedback signal of the heat pump outdoor unit 3, through specific circuit structures such as interlocking, clamping, and logical judgment, and then distributes them to the gas furnace indoor unit data conversion module 42 and the heat pump outdoor unit data conversion module 43 for conversion. The data signals of the thermostat 1 that do not cause signal conflicts are directly transmitted to the gas furnace indoor unit data conversion module 42.

[0054] Furthermore, the data port of the thermostat 1 is provided with CN1-C terminal, CN1-G terminal, CN1-W1 terminal, CN1-W2 terminal, CN1-Y1 terminal, CN1-Y2 terminal and CN1-Dh terminal, and the thermostat data conversion module 41 is provided with a first data conversion circuit 411 corresponding to CN1-G terminal, CN1-W1 terminal, CN1-W2 terminal, CN1-Y1 terminal, CN1-Y2 terminal and CN1-Dh terminal respectively;

[0055] The first data conversion circuit 411 includes a bidirectional TVS diode TVS1, an optocoupler U4, a resistor R9, a capacitor E5, a resistor R8, and a capacitor C5; the bidirectional TVS diode TVS1 is connected in parallel between the anode and cathode of the light source of the optocoupler U4, the anode of the light source of the optocoupler U4 is electrically connected to the CN1-G terminal, CN1-W1 terminal, CN1-W2 terminal, CN1-Y1 terminal, CN1-Y2 terminal, or CN1-Dh terminal, and the cathode of the light source of the optocoupler U4 is electrically connected to the CN1-C terminal;

[0056] The collector of the photodetector of optocoupler U4 is connected to the power supply. The emitter of the photodetector of optocoupler U4, one end of resistor R9, the positive terminal of capacitor E5, and one end of resistor R8 are all electrically connected. The other end of resistor R9, the negative terminal of capacitor E5, and one end of capacitor C5 are all grounded. After the other end of resistor R8 and the other end of capacitor C5 are electrically connected, they are electrically connected to the first input terminal of mode signal distribution module 44 or gas furnace indoor unit data conversion module 42.

[0057] In this embodiment, as Figure 3 As shown, according to the ports involving mode signals in the data ports of the temperature controller 1, a first data conversion circuit 411 is provided to convert AC signals into DC small signals (i.e., input conversion) and use an optocoupler U4 (the type of optocoupler is not limited, and a thyristor optocoupler, etc., can also be used) for isolation.

[0058] Furthermore, the data port of the heat pump outdoor unit 3 is provided with CN3-C terminal, CN3-Y terminal and CN3-W terminal, and the heat pump outdoor unit data conversion module 43 is provided with a second data conversion circuit 431 and a third data conversion circuit 432 corresponding to the CN3-Y terminal and CN3-W terminal respectively;

[0059] The second data conversion circuit 431 includes a thermistor PTC2, a silicon controlled rectifier optocoupler U17, a resistor R27, and a transistor Q6. The thermistor PTC2 is connected in series at the CN3-Y terminal and electrically connected to one end of the photodetector of the silicon controlled rectifier optocoupler U17. The other end of the photodetector of the silicon controlled rectifier optocoupler U17 and the anode of the light source of the silicon controlled rectifier optocoupler U17 are connected to the power supply. The cathode of the light source of the silicon controlled rectifier optocoupler U17 is connected in series with the resistor R27 and electrically connected to the collector of the transistor Q6. The emitter of the transistor Q6 is grounded, and the base of the transistor Q6 is electrically connected to the second output terminal of the mode signal distribution module 44.

[0060] The third data conversion circuit 432 includes a bidirectional TVS diode TVS8, an optocoupler U16, a resistor R28, a capacitor E15, a resistor R26, and a capacitor C20; the bidirectional TVS diode TVS8 is connected in parallel between the anode and cathode of the light source of the optocoupler U16, the anode of the light source of the optocoupler U16 is electrically connected to the CN3-Y terminal, and the cathode of the light source of the optocoupler U16 is electrically connected to the CN3-C terminal;

[0061] The collector of the photodetector of optocoupler U16 is connected to the power supply. The emitter of the photodetector of optocoupler U16, one end of resistor R28, the positive terminal of capacitor E15, and one end of resistor R26 are all electrically connected. The other end of resistor R28, the negative terminal of capacitor E15, and one end of capacitor C20 are all grounded. After the other end of resistor R26 and the other end of capacitor C20 are electrically connected, they are electrically connected to the second input terminal of mode signal distribution module 44.

[0062] In this embodiment, as Figure 4 As shown, according to the port involving mode signal in the data port of the heat pump outdoor unit 3, a second data conversion circuit 431 and a third data conversion circuit 432 are respectively provided. The second data conversion circuit 431 is used for output conversion, and the third data conversion circuit 432 is used for input conversion (similar to the first data conversion circuit 411).

[0063] It should be noted that the CN3-Y terminal of the heat pump outdoor unit 3 requires a small driving current, so a silicon controlled rectifier optocoupler U17 can be used for isolation transmission, eliminating the need for a relay, thus reducing power consumption, improving stability, and reducing the area occupied by components on the circuit board. At the same time, the thermistor PTC2 is used as a self-resetting fuse in the second data conversion circuit 431, which can play a role in self-resetting fault protection.

[0064] Furthermore, the data port of the gas furnace indoor unit 2 is provided with CN2-G terminal, CN2-W1 terminal, CN2-W2 terminal, CN2-Y1 terminal and CN2-Y2 terminal, the gas furnace indoor unit data conversion module 42 is provided with a fourth data conversion circuit 421 corresponding to CN2-G terminal, CN2-Y1 terminal and CN2-Y2 terminal respectively, and the gas furnace indoor unit data conversion module 42 is provided with a fifth data conversion circuit 422 corresponding to CN2-W1 terminal and CN2-W2 terminal respectively;

[0065] The fourth data conversion circuit 421 includes a thermistor PTC4, a silicon controlled rectifier optocoupler U7, a resistor R13, and a transistor Q1; the thermistor PTC4 is connected in series with the CN2-G terminal, CN2-Y1 terminal, or CN2-Y2 terminal and is electrically connected to one end of the photodetector of the silicon controlled rectifier optocoupler U7; the other end of the photodetector of the silicon controlled rectifier optocoupler U7 and the anode of the light source of the silicon controlled rectifier optocoupler U7 are connected to the power supply; the cathode of the light source of the silicon controlled rectifier optocoupler U7 is connected in series with the resistor R13 and is electrically connected to the collector of the transistor Q1; the emitter of the transistor Q1 is grounded, and the base of the transistor Q1 is electrically connected to the first output terminal of the mode signal distribution module 44;

[0066] The fifth data conversion circuit 422 includes a thermistor PTC5, a relay RL1, a diode D1, a transistor Q2, and a capacitor C1. The thermistor PTC5 is connected in series with the CN2-W1 or CN2-W2 terminal and then electrically connected to one end and the other end of the contact of the relay RL1. One end of the coil of the relay RL1 is electrically connected to the cathode of the diode D1 and then connected to the power supply. The other end of the coil of the relay RL1 and the anode of the diode D1 are both electrically connected to the collector of the transistor Q2. The emitter of the transistor Q2 is grounded. The capacitor C2 is connected in parallel between the base and the emitter of the transistor Q2. The base of the transistor Q2 is electrically connected to the first data conversion circuit 411 corresponding to the first output terminal of the mode signal distribution module 44 or the CN1-W2 terminal.

[0067] In this embodiment, as Figure 5 As shown, according to the mode signal port in the data port of the gas furnace indoor unit 2, a fourth data conversion circuit 421 is provided for small drive current output conversion, and a fifth data conversion circuit 422 is provided for large drive current output conversion.

[0068] Furthermore, the mode signal distribution module 44 includes OR gates OR1, OR2, OR3, OR4, AND gates AND1, AND2, AND3, AND4, AND5, NOT gates NOT1, NOT2, and NOT3; the first input terminal of OR gate OR1 is used as the second input terminal of the mode signal distribution module 44; the input terminals of NOT gate, the first input terminal of OR gate OR2, the second input terminal of OR gate OR2, the second input terminal of OR gate OR3, the first input terminal of OR gate OR4, and the second input terminal of OR gate OR4 are all used as the first input terminals of the mode signal distribution module 44; the input terminal of NOT gate NOT1, the output terminal of AND gate AND1, the output terminal of AND gate AND2, and the output terminal of AND gate AND3 are all used as the first output terminals of the mode signal distribution module 44; the output terminal of AND gate AND4 is used as the second output terminal of the mode signal distribution module 44.

[0069] The input terminal of NOT gate NOT2 is electrically connected to the first data conversion circuit 411 corresponding to the CN1-Dh terminal; the first input terminal of OR gate OR2 is electrically connected to the first data conversion circuit 411 corresponding to the CN1-Y1 terminal; the second input terminal of OR gate OR2 is electrically connected to the first data conversion circuit 411 corresponding to the CN1-Y2 terminal; the second input terminal of OR gate OR3 is electrically connected to the first data conversion circuit 411 corresponding to the CN1-G terminal; the first input terminal of OR gate OR4 is electrically connected to the first data conversion circuit 411 corresponding to the CN1-W1 terminal; and the second input terminal of OR gate OR4 is electrically connected to the first data conversion circuit 411 corresponding to the CN1-W2 terminal.

[0070] The input terminal of NOT gate NOT1 and the CN2-W1 terminal are electrically connected to the fifth data conversion circuit 422, the output terminal of AND gate AND1 and the CN2-G terminal are electrically connected to the fourth data conversion circuit 421, the output terminal of AND gate AND2 and the CN2-Y2 terminal are electrically connected to the fourth data conversion circuit 421, and the output terminal of AND gate AND3 and the CN2-Y1 terminal are electrically connected to the fourth data conversion circuit 421.

[0071] The second input of OR gate OR1 and the output of OR gate OR4 are electrically connected. The output of OR gate OR1 and the input of NOT gate NOT1 are both electrically connected to the input of NOT gate NOT3. The second input of OR gate OR2 and the second input of AND gate AND2 are electrically connected. The output of OR gate OR2, the first input of OR gate OR3, and the second input of AND gate AND3 are all electrically connected to the first input of AND gate AND4. The output of OR gate OR3 and the second input of AND gate AND1 are electrically connected. The first input of AND gate AND1 and the output of NOT gate NOT1 are both electrically connected to the second input of AND gate AND4. The first input of AND gate AND2 and the output of NOT gate NOT2 are electrically connected. The output of AND gate AND2 and the first input of AND gate AND5 are electrically connected. The first input of AND gate AND3 and the second input of AND gate AND5 are both electrically connected to the output of NOT gate NOT3.

[0072] In this embodiment, the logic for outputting the G signal is explained as follows:

[0073] (1) When there is a W1 or W2 signal, there is no G signal output;

[0074] (2) Condition 1: There are no W1 and W2 signals. Condition 2: If there are G, Y1 or Y2 signals, then there is a G signal output.

[0075] W1 signal output logic description: When there is a W1, W2 or W (i.e., OD_W_I) signal, the W1 signal will be output.

[0076] W2 signal output logic description: The W2 signal is output directly without any logical judgment.

[0077] Y1 signal output logic description:

[0078] (1) Condition 1: There is no W1 signal; Condition 2: There is a Y1 or Y2 signal, then there is a Y1 signal output.

[0079] (2) When there is a W1 signal, there is no Y1 signal output regardless of whether there is a Y1 or Y2 signal.

[0080] Y2 signal output logic description:

[0081] (1) When there is no Dh signal, regardless of whether there is a Y2 signal, the output of the Y2 signal follows the W1 signal (i.e., is the same);

[0082] (2) When there is a Dh signal, there is no Y2 signal output regardless of whether there is a Y1 or Y2 signal.

[0083] Y signal output logic description:

[0084] (1) When neither W1 nor W2 signal is present, the output of the Y signal follows either the Y1 or Y2 signal (i.e., if either Y1 or Y2 is present, the output is present; if either Y1 or Y2 is absent, the output is absent).

[0085] (2) When there is a W1 or W2 signal, the Y signal will not be output regardless of whether there is a Y1 or Y2 signal.

[0086] Specifically, the modes to be identified are cooling mode, heat pump heating mode, gas heating mode, and defrosting mode. The signal combinations for the operating modes (i.e., mode signals) are as follows (Note: Figures 7 to 10 (The asterisk "*" in the image represents any signal of the same type.)

[0087] Cooling mode: Heat pump outdoor unit 3: Y*O + gas furnace indoor unit 2: Y*, corresponding to... Figure 7 The flowchart shown;

[0088] Gas heating mode: Heat pump outdoor unit 3: None + Gas boiler indoor unit 2: W*, corresponding to... Figure 8 The flowchart shown is as follows (Note: The presence or absence of the Y* signal does not affect the process).

[0089] Heat pump heating mode: Heat pump outdoor unit 3: Y* + gas furnace indoor unit 2: Y*, corresponding as follows Figure 9 The flowchart shown;

[0090] Defrosting mode: Heat pump outdoor unit 3: Y*W + gas boiler indoor unit 2: W*, corresponding to... Figure 10The flowchart shown is as follows; it should be noted that the logical sequence is: the heat pump outdoor unit 3 receives Y* and starts auxiliary heating at the same time, and feeds back the W signal (which belongs to the existing signal logic mechanism of the heat pump outdoor unit 3). When the mode signal distribution module 44 receives the W signal, it distributes it to the gas furnace indoor unit 2.

[0091] Therefore, based on the combination of labeled signals, the preferred design is as follows: Figure 6 The logic circuit shown constitutes the mode signal distribution module 44 (other circuits composed of logic devices that can implement the same logic can also be used as mode signal distribution module 44). Its core is to solve the problem that the gas furnace indoor unit 2 and the heat pump outdoor unit 3 cannot receive Y*W* signals at the same time. Thus, the logic circuit replaces the shared signal line method to ensure the constant and correct output of the four working mode label signal combinations.

[0092] Furthermore, the data port of the thermostat 1 is also provided with a CN1-O terminal, the data port of the heat pump outdoor unit 3 is also provided with a CN3-O terminal, and the relay device 4 is also provided with a mode switching prompt module 45; the mode switching prompt module 45 includes a bidirectional TVS diode TVS9, an optocoupler U18, a resistor R44, a capacitor E17 and a first prompt circuit 451.

[0093] The bidirectional TVS diode TVS9 is connected in parallel between the anode and cathode of the light source of the optocoupler U18. The CN1-O terminal and CN3-O terminal are electrically connected to the anode of the light source of the optocoupler U18, and the CN1-C terminal and CN3-C terminal are electrically connected to the cathode of the light source of the optocoupler U18.

[0094] The collector of the photodetector of optocoupler U18 is connected to the power supply. The emitter of the photodetector of optocoupler U4, one end of resistor R44, and the positive terminal of capacitor E17 are all electrically connected to the positive terminal of the first indication circuit 451. The other end of resistor R44, the negative terminal of capacitor E17, and the negative terminal of the first indication circuit 451 are all grounded.

[0095] In this embodiment, as Figure 11 As shown, the mode switching prompt module 45 is used to view the mode switching status. It mainly controls the operation of the first prompt circuit 451 by isolating the transmitted signal through the optocoupler U18. It should be noted that the prompting method of the first prompt circuit 451 is not limited; it can be as follows: Figure 11 The LED circuit shown.

[0096] Furthermore, the first data conversion circuit 411 also includes a second prompting circuit 4111; the positive terminal of the second prompting circuit 4111 is electrically connected to the common junction of the emitter of the photodetector of the optocoupler U4, one end of the resistor R9, the positive terminal of the capacitor E5, and one end of the resistor R8, and the negative terminal of the second prompting circuit 4111 is grounded.

[0097] In this embodiment, the second prompting circuit 4111 is used to indicate the data port signal status of the temperature controller 1.

[0098] Furthermore, the second data conversion circuit 431 also includes a third prompting circuit 4311, and the third data conversion circuit 432 also includes a fourth prompting circuit 4321; the positive terminal of the third prompting circuit 4311 is electrically connected to the common connection point of the second output terminal of the second data conversion circuit 431 and the mode signal distribution module 44, and the negative terminal of the third prompting circuit 4311 is grounded.

[0099] The positive terminal of the fourth prompting circuit 4321 is electrically connected to the common junction of the emitter of the photodetector of the optocoupler U16, one end of the resistor R28, the positive terminal of the capacitor E15, and one end of the resistor R26. The negative terminal of the fourth prompting circuit 4321 is grounded.

[0100] In this embodiment, the third prompting circuit 4311 is used to prompt the signal status of the output terminal in the data port of the heat pump outdoor unit 3, and the fourth prompting circuit 4321 is used to prompt the signal status of the feedback terminal in the data port of the heat pump outdoor unit 3.

[0101] Furthermore, the fourth data conversion circuit 421 also includes a fifth prompting circuit 4211, and the fifth data conversion circuit 422 also includes a sixth prompting circuit 4221; the positive terminal of the fifth prompting circuit 4211 is electrically connected to the common connection point of the first output terminal of the fourth data conversion circuit 421 and the mode signal distribution module 44, and the negative terminal of the fifth prompting circuit 4211 is grounded.

[0102] The positive terminal of the sixth prompt circuit 4221 is electrically connected to the common connection point of the first output terminal of the fifth data conversion circuit 422 and the mode signal distribution module 44, or electrically connected to the common connection point of the fifth data conversion circuit 422 and the first data conversion circuit 411 corresponding to the CN1-W2 terminal; the negative terminal of the sixth prompt circuit 4221 is grounded.

[0103] In this embodiment, both the fifth prompting circuit 4211 and the sixth prompting circuit 4221 are used to indicate the signal status of the data port of the indoor unit 2 of the gas furnace.

[0104] Other configurations and operations of the relay control system between two heat sources according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0105] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0106] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A relay control system between two heat sources, characterized in that: It includes a thermostat, a gas furnace indoor unit, a heat pump outdoor unit, and a relay device; the data ports of the thermostat, the gas furnace indoor unit, and the heat pump outdoor unit are respectively electrically connected to the relay device; The relay device is equipped with a mode signal distribution module. The relay device is used to receive the data signal from the thermostat and the feedback signal from the heat pump outdoor unit, and distribute them to the gas furnace indoor unit and the heat pump outdoor unit through the mode signal distribution module.

2. The relay control system between two heat sources according to claim 1, characterized in that: The relay device also includes a thermostat data conversion module, a gas furnace indoor unit data conversion module, and a heat pump outdoor unit data conversion module; the data port of the thermostat is electrically connected to the thermostat data conversion module, the thermostat data conversion module is electrically connected to the first input terminal of the mode signal distribution module and the gas furnace indoor unit data conversion module, the first output terminal of the mode signal distribution module is electrically connected to the gas furnace indoor unit data conversion module, the gas furnace indoor unit data conversion module is electrically connected to the data port of the gas furnace indoor unit, the heat pump outdoor unit data conversion module is electrically connected to the second input terminal and the second output terminal of the mode signal distribution module, and the heat pump outdoor unit data conversion module is electrically connected to the data port of the heat pump outdoor unit.

3. A relay control system between two heat sources according to claim 2, characterized in that: The temperature controller has a data port with CN1-C, CN1-G, CN1-W1, CN1-W2, CN1-Y1, CN1-Y2 and CN1-Dh terminals. The temperature controller data conversion module is provided with a first data conversion circuit for each of the CN1-G, CN1-W1, CN1-W2, CN1-Y1, CN1-Y2 and CN1-Dh terminals. The first data conversion circuit includes a bidirectional TVS diode TVS1, an optocoupler U4, a resistor R9, a capacitor E5, a resistor R8, and a capacitor C5; the bidirectional TVS diode TVS1 is connected in parallel between the anode and cathode of the light source of the optocoupler U4; the anode of the light source of the optocoupler U4 is electrically connected to the CN1-G terminal, the CN1-W1 terminal, the CN1-W2 terminal, the CN1-Y1 terminal, the CN1-Y2 terminal, or the CN1-Dh terminal; and the cathode of the light source of the optocoupler U4 is electrically connected to the CN1-C terminal. The collector of the photodetector of the optocoupler U4 is connected to the power supply. The emitter of the photodetector of the optocoupler U4, one end of the resistor R9, the positive terminal of the capacitor E5, and one end of the resistor R8 are all electrically connected. The other end of the resistor R9, the negative terminal of the capacitor E5, and one end of the capacitor C5 are all grounded. After the other end of the resistor R8 and the other end of the capacitor C5 are electrically connected, they are electrically connected to the first input terminal of the mode signal distribution module or the data conversion module of the gas furnace indoor unit.

4. A relay control system between two heat sources according to claim 3, characterized in that: The data port of the heat pump outdoor unit is provided with CN3-C terminal, CN3-Y terminal and CN3-W terminal, and the heat pump outdoor unit data conversion module is provided with a second data conversion circuit and a third data conversion circuit respectively corresponding to the CN3-Y terminal and the CN3-W terminal; The second data conversion circuit includes a thermistor PTC2, a silicon controlled rectifier optocoupler U17, a resistor R27, and a transistor Q6. The CN3-Y terminal is connected in series with the thermistor PTC2 and electrically connected to one end of the photodetector of the silicon controlled rectifier optocoupler U17. The other end of the photodetector of the silicon controlled rectifier optocoupler U17 and the anode of the light source of the silicon controlled rectifier optocoupler U17 are connected to the power supply. The cathode of the light source of the silicon controlled rectifier optocoupler U17 is connected in series with the resistor R27 and electrically connected to the collector of the transistor Q6. The emitter of the transistor Q6 is grounded, and the base of the transistor Q6 is electrically connected to the second output terminal of the mode signal distribution module. The third data conversion circuit includes a bidirectional TVS diode TVS8, an optocoupler U16, a resistor R28, a capacitor E15, a resistor R26, and a capacitor C20; the bidirectional TVS diode TVS8 is connected in parallel between the anode and cathode of the light source of the optocoupler U16, the anode of the light source of the optocoupler U16 is electrically connected to the CN3-Y terminal, and the cathode of the light source of the optocoupler U16 is electrically connected to the CN3-C terminal; The collector of the photodetector of the optocoupler U16 is connected to the power supply. The emitter of the photodetector of the optocoupler U16, one end of the resistor R28, the positive terminal of the capacitor E15, and one end of the resistor R26 are all electrically connected. The other end of the resistor R28, the negative terminal of the capacitor E15, and one end of the capacitor C20 are all grounded. After the other end of the resistor R26 and the other end of the capacitor C20 are electrically connected, they are electrically connected to the second input terminal of the mode signal distribution module.

5. A relay control system between two heat sources according to claim 4, characterized in that: The data port of the gas furnace indoor unit is provided with CN2-G terminal, CN2-W1 terminal, CN2-W2 terminal, CN2-Y1 terminal and CN2-Y2 terminal. The gas furnace indoor unit data conversion module is provided with a fourth data conversion circuit corresponding to the CN2-G terminal, the CN2-Y1 terminal and the CN2-Y2 terminal respectively. The gas furnace indoor unit data conversion module is provided with a fifth data conversion circuit corresponding to the CN2-W1 terminal and the CN2-W2 terminal respectively. The fourth data conversion circuit includes a thermistor PTC4, a silicon controlled rectifier optocoupler U7, a resistor R13, and a transistor Q1. The thermistor PTC4 is connected in series with either the CN2-G terminal, the CN2-Y1 terminal, or the CN2-Y2 terminal, and is electrically connected to one end of the photodetector of the silicon controlled rectifier optocoupler U7. The other end of the photodetector of the silicon controlled rectifier optocoupler U7 and the anode of the light source of the silicon controlled rectifier optocoupler U7 are connected to the power supply. The cathode of the light source of the silicon controlled rectifier optocoupler U7 is connected in series with the resistor R13 and is electrically connected to the collector of the transistor Q1. The emitter of the transistor Q1 is grounded, and the base of the transistor Q1 is electrically connected to the first output terminal of the mode signal distribution module. The fifth data conversion circuit includes a thermistor PTC5, a relay RL1, a diode D1, a transistor Q2, and a capacitor C1. The thermistor PTC5 is connected in series with the CN2-W1 or CN2-W2 terminal, and then electrically connected to one end and the other end of the contact of the relay RL1. One end of the coil of the relay RL1 is electrically connected to the cathode of the diode D1 and then connected to a power supply. The other end of the coil of the relay RL1 and the anode of the diode D1 are both electrically connected to the collector of the transistor Q2. The emitter of the transistor Q2 is grounded. The capacitor C2 is connected in parallel between the base and emitter of the transistor Q2. The base of the transistor Q2 is electrically connected to the first output terminal of the mode signal distribution module or the first data conversion circuit corresponding to the CN1-W2 terminal.

6. A relay control system between two heat sources according to claim 5, characterized in that: The mode signal distribution module includes OR gates OR1, OR2, OR3, OR4, AND gates AND1, AND2, AND3, AND4, AND5, NOT gates NOT1, NOT2, and NOT3. The first input of OR gate OR1 serves as the second input of the mode signal distribution module. The inputs of NOT gate NOT2, the first and second inputs of OR gate OR2, the second input of OR gate OR2, the second input of OR gate OR3, the first and second inputs of OR gate OR4 all serve as the first inputs of the mode signal distribution module. The inputs of NOT gate NOT1, the outputs of AND gate AND1, AND gate AND2, and AND gate AND3 all serve as the first outputs of the mode signal distribution module. The output of AND gate AND4 serves as the second output of the mode signal distribution module. The input terminal of NOT gate NOT2 is electrically connected to the first data conversion circuit corresponding to the CN1-Dh terminal; the first input terminal of OR gate OR2 is electrically connected to the first data conversion circuit corresponding to the CN1-Y1 terminal; the second input terminal of OR gate OR2 is electrically connected to the first data conversion circuit corresponding to the CN1-Y2 terminal; the second input terminal of OR gate OR3 is electrically connected to the first data conversion circuit corresponding to the CN1-G terminal; the first input terminal of OR gate OR4 is electrically connected to the first data conversion circuit corresponding to the CN1-W1 terminal; and the second input terminal of OR gate OR4 is electrically connected to the first data conversion circuit corresponding to the CN1-W2 terminal. The input terminal of NOT gate NOT1 is electrically connected to the fifth data conversion circuit corresponding to the CN2-W1 terminal; the output terminal of AND gate AND1 is electrically connected to the fourth data conversion circuit corresponding to the CN2-G terminal; the output terminal of AND gate AND2 is electrically connected to the fourth data conversion circuit corresponding to the CN2-Y2 terminal; and the output terminal of AND gate AND3 is electrically connected to the fourth data conversion circuit corresponding to the CN2-Y1 terminal. The second input of OR gate OR1 is electrically connected to the output of OR gate OR4. The output of OR gate OR1 and the input of NOT gate NOT1 are both electrically connected to the input of NOT gate NOT3. The second input of OR gate OR2 is electrically connected to the second input of AND gate AND2. The output of OR gate OR2, the first input of OR gate OR3, and the second input of AND gate AND3 are all electrically connected to the first input of AND gate AND4. The output of OR gate OR3 is electrically connected to the second input of AND gate AND1. The first input of AND gate AND1 and the output of NOT gate NOT1 are both electrically connected to the second input of AND gate AND4. The first input of AND gate AND2 is electrically connected to the output of NOT gate NOT2. The output of AND gate AND2 is electrically connected to the first input of AND gate AND5. The first input of AND gate AND3 and the second input of AND gate AND5 are both electrically connected to the output of NOT gate NOT3.

7. A relay control system between two heat sources according to claim 4, characterized in that: The data port of the thermostat is also provided with a CN1-O terminal, the data port of the heat pump outdoor unit is also provided with a CN3-O terminal, and the relay device is also provided with a mode switching prompt module; the mode switching prompt module includes a bidirectional TVS diode TVS9, an optocoupler U18, a resistor R44, a capacitor E17, and a first prompt circuit. The bidirectional TVS diode TVS9 is connected in parallel between the anode and cathode of the light source of the optocoupler U18. The CN1-O terminal and the CN3-O terminal are both electrically connected to the anode of the light source of the optocoupler U18, and the CN1-C terminal and the CN3-C terminal are both electrically connected to the cathode of the light source of the optocoupler U18. The collector of the photodetector of the optocoupler U18 is connected to the power supply. The emitter of the photodetector of the optocoupler U4, one end of the resistor R44, and the positive terminal of the capacitor E17 are all electrically connected to the positive terminal of the first indication circuit. The other end of the resistor R44, the negative terminal of the capacitor E17, and the negative terminal of the first indication circuit are all grounded.

8. A relay control system between two heat sources according to claim 3, characterized in that: The first data conversion circuit further includes a second prompting circuit; the positive terminal of the second prompting circuit is electrically connected to the common junction of the emitter of the photodetector of the optocoupler U4, one end of the resistor R9, the positive terminal of the capacitor E5, and one end of the resistor R8, and the negative terminal of the second prompting circuit is grounded.

9. A relay control system between two heat sources according to claim 4, characterized in that: The second data conversion circuit further includes a third prompting circuit, and the third data conversion circuit further includes a fourth prompting circuit; the positive terminal of the third prompting circuit is electrically connected to the common connection point of the second output terminal of the second data conversion circuit and the mode signal distribution module, and the negative terminal of the third prompting circuit is grounded; The positive terminal of the fourth prompting circuit is electrically connected to the common junction of the emitter of the photodetector of the optocoupler U16, one end of the resistor R28, the positive terminal of the capacitor E15, and one end of the resistor R26, while the negative terminal of the fourth prompting circuit is grounded.

10. A relay control system between two heat sources according to claim 5, characterized in that: The fourth data conversion circuit further includes a fifth prompting circuit, and the fifth data conversion circuit further includes a sixth prompting circuit; the positive terminal of the fifth prompting circuit is electrically connected to the common connection point of the first output terminal of the fourth data conversion circuit and the mode signal distribution module, and the negative terminal of the fifth prompting circuit is grounded; The positive terminal of the sixth prompt circuit is electrically connected to the common connection point of the fifth data conversion circuit and the first output terminal of the mode signal distribution module, or electrically connected to the common connection point of the fifth data conversion circuit and the first data conversion circuit corresponding to the CN1-W2 terminal; the negative terminal of the sixth prompt circuit is grounded.

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