Air conditioning system

Abstract

The present application proposes an air conditioning system, comprising a first system, a second system, an outdoor heat exchanger, a compressor including an air intake and an air exhaust port, and a main expansion valve. The first system includes a first system heat exchanger for performing heat exchange with an indoor wind farm, and the second system includes a second system heat exchanger for performing heat exchange with a water circulation component. The air conditioning system further comprises a connecting valve, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve. When the controller receives a first signal, the second solenoid valve is closed, the first solenoid valve is opened, the third solenoid valve is closed, the S opening is connected to the C opening, and the fourth solenoid valve is opened to connect the first system heat exchanger with the air intake port, so that the refrigerant in the first system heat exchanger is in a low-pressure gaseous state. In the above process, the refrigerant flows out of the exhaust port of the compressor, flows through the first solenoid valve into the second system heat exchanger and the main expansion valve, and then flows back to the air intake port of the compressor through the outdoor heat exchanger, thereby realizing refrigerant circulation.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to an air-conditioning system. Background Art

[0002] Currently for household air conditioners, refer to Figure 1 Both cooling and heating are achieved by using the same indoor heat exchanger and the indoor air field through a fan system for forced convection heat exchange. Under this technical solution, the cooling mode is generally acceptable, but the heating mode is not accepted by users due to problems such as forced blowing, dryness, and poor thermal comfort.

[0003] In order to solve the thermal comfort problem in the heating mode, the related art installs a centralized heating water radiator or a water system floor radiant heating on the air conditioning system to achieve heating. Figure 2 The VRF multi-split system is equivalent to a one-to-one system with multiple indoor terminals connected in parallel. In the throttling mode, multiple electronic expansion valves are added to the indoor unit to achieve throttling of each indoor unit for cooling, and throttling of the outdoor unit for heating mode. The cooling mode or heating mode also uses the indoor heat exchanger and the indoor wind field through the fan system for forced convection heat exchange.

[0004] At present, the field of multi-split technology has extended from VRF multi-split to integrate water and floor heating to realize the natural fluorine and ground water system. Figure 3 This is equivalent to connecting a water module in parallel to the indoor unit on the basis of the existing multi-split VRF system, achieving cooling through the air conditioning system and heating through the water heating system. At the same time, the air conditioning terminal can also achieve heating, realizing the separation of the air conditioning system terminal and the water heating system terminal.

[0005] However, when the floor heating is running, the indoor heat exchanger is in a high-pressure state and has a high-pressure refrigerant circulation. The indoor unit has a high-pressure refrigerant that exchanges heat with the heat exchanger, resulting in heat leakage in each indoor unit. As a result, when the floor heating is running, the efficiency is low and the usage cost is high.

[0006] Similarly, when the indoor heat exchanger corresponding to the end of the air-conditioning system is heating, because the heat exchanger of the water module is in a high-pressure state, there will be a circulation of high-pressure refrigerant, heat leakage, resulting in energy loss, and also leading to problems such as efficiency and high usage costs.

[0007] In view of this, this application is filed. Summary of the Invention

[0008] The present application proposes an air-conditioning system. Compared with the related art, the air-conditioning system realizes independent operation of the refrigeration circuits of the first system and the second system. When the second system is heating, the control of the solenoid valve ensures that there is no heat leakage of the high-pressure liquid refrigerant in the heat exchanger of the first system, which greatly reduces heat loss and improves economic efficiency.

[0009] The present application provides an air conditioning system, comprising:

[0010] A compressor, which is used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and output it, and the compressor includes an air intake port and an air exhaust port;

[0011] at least one first system;

[0012] Second system;

[0013] The first system includes:

[0014] The first system heat exchanger is used for exchanging heat with the indoor wind farm;

[0015] The second system includes:

[0016] The second system heat exchanger is used to exchange heat with the water circulation component, and the water circulation component can be used to exchange heat with the indoor wind farm;

[0017] The air conditioning system also includes:

[0018] An outdoor heat exchanger, which is connected to the first system heat exchanger and the second system heat exchanger through pipelines, and is used to exchange heat with the outdoor wind farm;

[0019] The main expansion valve is connected to the outdoor heat exchanger and is used to expand the high-temperature and high-pressure liquid refrigerant into a low-pressure liquid refrigerant;

[0020] The connecting valve includes three openings, which are defined as D opening, C opening and S opening respectively. The D opening is connected to the exhaust port, the C opening is connected to the outdoor heat exchanger, and the S opening is connected to the intake port.

[0021] a first solenoid valve, one end of which is connected to the exhaust port of the compressor, and the other end of which is connected to the second system heat exchanger;

[0022] a second solenoid valve, one end of which is connected to the exhaust port of the compressor, and the other end of which is connected to the first system heat exchanger;

[0023] a third solenoid valve, one end of which is connected to the suction port of the compressor, and the other end of which is connected to the second system heat exchanger connected to one end of the first solenoid valve;

[0024] a fourth solenoid valve, one end of which is connected to the suction port of the compressor, and the other end of which is connected to the first system heat exchanger connected to one end of the second solenoid valve;

[0025] A first refrigerant circuit, comprising a compressor, a second solenoid valve, a first system heat exchanger, a main expansion valve, and an outdoor heat exchanger;

[0026] a second refrigerant circuit, comprising a compressor, a first solenoid valve, a second system heat exchanger, a main expansion valve, and an outdoor heat exchanger;

[0027] The first refrigerant circuit and the second refrigerant circuit can work independently;

[0028] The controller is configured to, when receiving the first signal, close the second solenoid valve, open the first solenoid valve, close the third solenoid valve, connect the S opening to the C opening, and open the fourth solenoid valve to connect the first system heat exchanger to the air intake port, so that the refrigerant in the first system heat exchanger is in a low-pressure gaseous state;

[0029] After the refrigerant flows out of the exhaust port of the compressor, it flows into the second system heat exchanger and the main expansion valve through the first solenoid valve, and then flows back to the suction port of the compressor through the outdoor heat exchanger.

[0030] In some embodiments of the present application, water in the water circulation assembly is used to heat the room where the first system heat exchanger is installed; the first system further includes:

[0031] a first sub-expansion valve, the first sub-expansion valve being arranged on a side of the first system heat exchanger away from the compressor;

[0032] a third refrigerant circuit, comprising a compressor, a first solenoid valve, a second system heat exchanger, a first sub-expansion valve, a first system heat exchanger, and a fourth solenoid valve;

[0033] The controller is configured to, when receiving the second signal, open the first solenoid valve, close the second solenoid valve, open the fourth solenoid valve, close the third solenoid valve, close the main expansion valve, and connect the C opening and the S opening of the communication valve to connect the outdoor heat exchanger to the suction port;

[0034] The refrigerant flows out from the exhaust port of the compressor, enters the second system heat exchanger through the first solenoid valve, then passes through the corresponding first sub-expansion valve, the corresponding first system heat exchanger, and then flows back to the suction port of the compressor through the fourth solenoid valve;

[0035] The refrigerant in the second system heat exchanger exchanges heat with the water in the water circulation component, and the refrigerant in the first system heat exchanger exchanges heat with the indoor wind field. The water in the water circulation component is used to heat the indoor temperature to compensate for the temperature drop during the dehumidification process of the first system.

[0036] In some embodiments of the present application, the controller is configured to:

[0037] After receiving the third signal, the second solenoid valve is closed, the first solenoid valve is closed, the fourth solenoid valve is opened, the D opening of the connecting valve is connected to the C opening, all the main expansion valves are opened, the corresponding first sub-expansion valves are opened, and the third solenoid valve is opened. The second system heat exchanger is connected to the suction port of the compressor through the third solenoid valve, so that the refrigerant in the second system heat exchanger is in a low-pressure gaseous state;

[0038] The refrigerant flows out from the exhaust port of the compressor into the outdoor heat exchanger, passes through the corresponding first sub-expansion valve into the corresponding first system heat exchanger, and then passes through the fourth solenoid valve into the suction port of the compressor.

[0039] In some embodiments of the present application, the controller is configured to: when receiving the fourth signal, close the first solenoid valve, open the second solenoid valve, close the fourth solenoid valve, connect the S port and the C port, fully open the main expansion valve, and open the third solenoid valve;

[0040] The second system heat exchanger is connected to the suction port of the compressor, and the refrigerant in the second system heat exchanger is in a low-pressure gaseous state;

[0041] The refrigerant flows out from the exhaust port of the compressor and enters the first system heat exchanger through the second solenoid valve. The refrigerant in the first system heat exchanger exchanges heat with the indoor wind field and then flows back to the suction port of the compressor through the main expansion valve used for throttling and the outdoor heat exchanger.

[0042] In some embodiments of the present application, the second system further includes:

[0043] The floor heating is installed indoors and is used for heat exchange with the indoor wind field. The floor heating is connected to the second system heat exchanger through a water circulation component.

[0044] In some embodiments of the present application, the water circulation component includes:

[0045] A pipeline is provided on one side of the second system heat exchanger and is connected to the floor heating;

[0046] A water pump is installed on the pipeline to provide water circulation power;

[0047] The expansion tank is installed on the pipeline and is used to balance the water volume and pressure in the pipeline.

[0048] In some embodiments of the present application, the air-conditioning system includes multiple first-system heat exchangers, and each of the first-system heat exchangers is provided with a first sub-expansion valve in a one-to-one correspondence. During the operation of the air-conditioning system, when part of the first system is working and part of the first system is shut down, the opening of the first sub-expansion valve of the turned-on first system is maintained in a preset working opening range, and the opening of the first sub-expansion valve of the turned-off first system is maintained in a preset shutdown opening range.

[0049] In some embodiments of the present application, the connecting valve can be configured as a four-way valve, with one opening closed and the other three openings connected to the outdoor heat exchanger, the air intake port, and the air exhaust port, respectively.

[0050] The present application also provides another air conditioning system, including:

[0051] A compressor, which is used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and output it, and the compressor includes an air intake port and an air exhaust port;

[0052] At least one first system, the first system comprising:

[0053] The first system heat exchanger is used for exchanging heat with the indoor wind farm;

[0054] a first sub-expansion valve connected to the first system heat exchanger;

[0055] The second system is used to perform heat exchange in the room where the first system is located. The second system includes:

[0056] A second system heat exchanger, which is used to exchange heat with the water circulation component;

[0057] The air conditioning system also includes:

[0058] An outdoor heat exchanger, which is connected to the first system heat exchanger and the second system heat exchanger through refrigerant circulation pipelines, and is used to exchange heat with the outdoor wind farm;

[0059] The main expansion valve is connected to the outdoor heat exchanger and is used to expand the high-temperature and high-pressure liquid refrigerant into a low-pressure liquid refrigerant;

[0060] The connecting valve includes three openings, which are defined as D opening, C opening and S opening respectively. The D opening is connected to the exhaust port, the C opening is connected to the outdoor heat exchanger, and the S opening is connected to the intake port.

[0061] a first solenoid valve, one end of which is connected to the exhaust port of the compressor, and the other end of which is connected to the second system heat exchanger;

[0062] a second solenoid valve, one end of which is connected to the exhaust port of the compressor, and the other end of which is connected to the first system heat exchanger;

[0063] a third solenoid valve, one end of which is connected to the air intake port of the compressor, and the other end of which is connected to the second system heat exchanger;

[0064] a fourth solenoid valve, one end of which is connected to the air intake port of the compressor, and the other end of which is connected to the first system heat exchanger;

[0065] The controller is configured to, when receiving the second signal, open the first solenoid valve, close the second solenoid valve, open the fourth solenoid valve, close the third solenoid valve, connect the C opening and the S opening of the communication valve, and close the main expansion valve;

[0066] The refrigerant flows out from the exhaust port of the compressor, enters the second system heat exchanger through the first solenoid valve, and then flows back to the suction port of the compressor after passing through the corresponding first sub-expansion valve and the corresponding first system heat exchanger;

[0067] The refrigerant in the second system heat exchanger exchanges heat with the water in the water circulation component, and the refrigerant in the first system heat exchanger exchanges heat with the indoor wind field. The heat reduced during the dehumidification process of the first system is used to heat the water in the water circulation component, and the water in the water circulation component is used to heat the indoor temperature to compensate for the temperature drop during the dehumidification process of the first system.

[0068] In some embodiments of the present application, the second system further includes:

[0069] The floor heating is installed indoors and is used for heat exchange with the indoor wind field. The floor heating is connected to the second system heat exchanger through a water circulation component.

[0070] In the above embodiments, the present application proposes an air conditioning system comprising a first system, a second system, an outdoor heat exchanger, a compressor including an air intake and an air exhaust port, and a main expansion valve. The first system includes a first system heat exchanger for performing heat exchange with an indoor wind farm, and the second system includes a second system heat exchanger for performing heat exchange with a water circulation component. The air conditioning system also includes a connecting valve, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve.

[0071] When the controller receives the first signal, it closes the second solenoid valve, opens the first solenoid valve, closes the third solenoid valve, connects the S opening with the C opening, and opens the fourth solenoid valve to connect the first system heat exchanger with the air intake, so that the refrigerant in the first system heat exchanger is in a low-pressure gaseous state. At this time, the other refrigerant interfaces of the first system heat exchanger are cut off, there is no flow and no heat leakage, thereby ensuring the normal operation of the entire system.

[0072] In the above process, after the refrigerant flows out from the exhaust port of the compressor, it flows into the second system heat exchanger and the main expansion valve through the first solenoid valve, and then flows back to the suction port of the compressor through the outdoor heat exchanger, realizing the refrigerant circulation.

[0073] Compared with the current combined air-fluorine and ground-water air-conditioning system, the air-conditioning system in this application realizes the separation of the system terminals. When the terminal of the second system is operating, the control of the solenoid valve can realize that there is no heat leakage of high-pressure liquid refrigerant in the terminal of the first system, which greatly reduces heat loss and improves the economic efficiency of use. When the above technical solution is used in heating operation, the cost is reduced by more than 20%. At the same time, it is flexible to use. It can be heated by the air-conditioning terminal, or by the floor heating terminal or by the water tank to produce hot water. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0075] Figure 1 is a schematic structural diagram of a refrigeration system provided according to an exemplary embodiment;

[0076] Figure 2 A schematic structural diagram of a natural fluorine and ground water air conditioning system according to an exemplary embodiment;

[0077] Figure 3 A schematic diagram of the structure of an air conditioning system according to an exemplary embodiment Figure 1 ;

[0078] Figure 4 A schematic diagram of the structure of an air conditioning system according to an exemplary embodiment Figure 2 ;

[0079] Figure 5 is a schematic structural diagram of a first refrigerant circuit according to an exemplary embodiment;

[0080] Figure 6 is a schematic structural diagram of a second refrigerant circuit according to an exemplary embodiment;

[0081] Figure 7 is a refrigerant flow diagram when the second system operates in a heating mode according to an exemplary embodiment;

[0082] Figure 8 is a refrigerant flow diagram when the first system operates in a heating mode according to an exemplary embodiment;

[0083] Figure 9 is a refrigerant flow diagram when the first system operates in a cooling mode according to an exemplary embodiment;

[0084] Figure 10 is a schematic structural diagram of a third refrigerant circuit according to an exemplary embodiment;

[0085] Figure 11 FIG1 is a refrigerant flow diagram in which the first system operates for dehumidification and the second system operates for heating according to an exemplary embodiment;

[0086] Figure 12 is a block diagram of a hardware configuration of a controller according to an exemplary embodiment;

[0087] In the above figures:

[0088] Air conditioning system 100; compressor 1; first system 2; second system 3; outdoor heat exchanger 4;

[0089] Main expansion valve 5; connecting valve 6; four-way valve 61; first solenoid valve 71; second solenoid valve 72;

[0090] The third solenoid valve 73; the fourth solenoid valve 74; the first sub-expansion valve 91; the second sub-expansion valve 92;

[0091] First system heat exchanger 21; second system heat exchanger 31; floor heating 101; water circulation component 102;

[0092] Pipeline 103; water pump 104; expansion tank 105; first rough stop valve 11; second rough stop valve 12;

[0093] A first fine stop valve 13; a second fine stop valve 14;

[0094] Controller 8; processor 83; memory 82; communication interface 84; bus 81. DETAILED DESCRIPTION

[0095] The present invention is described in detail below by way of exemplary embodiments, but it should be understood that elements, structures, and features of one embodiment may be beneficially combined in other embodiments without further description.

[0096] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0097] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0098] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections via an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0099] The embodiment of the present application provides an air conditioning system 100, referring to Figure 1 The air conditioner includes a refrigeration system for exchanging heat with the indoor wind field or water circulation component 102 to meet cooling or heating needs.

[0100] The refrigeration system includes a compressor 1, a condenser, an expansion valve, and an evaporator. In this application, the air conditioning system 100 performs a refrigeration cycle of the air conditioning system 100 by using the compressor 1, the condenser, the expansion valve, and the evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0101] Compressor 1 compresses high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, releasing heat into the surrounding environment through the condensation process.

[0102] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor 1.

[0103] The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioning system 100 can adjust the temperature of the indoor space.

[0104] The outdoor unit of the air conditioning system 100 refers to a portion of the refrigeration cycle including the compressor 1 and the outdoor heat exchanger.

[0105] The indoor unit of the air-conditioning system 100 may include a first system heat exchanger 21 , and an expansion valve may be provided in the indoor unit or the outdoor unit.

[0106] The first system heat exchanger 21 and the outdoor heat exchanger function as a condenser or an evaporator. When the first system heat exchanger 21 functions as a condenser, the air conditioning system 100 functions as a heater in the heating mode, and when the first system heat exchanger 21 functions as an evaporator, the air conditioning system 100 functions as a cooler in the cooling mode.

[0107] In order to improve the comfort of the heating mode of the indoor air conditioner, a second system heat exchanger 31 is added to the indoor unit side of the air conditioning system 100. In addition, indoor heating can be achieved by installing centralized heating water radiators or water system floor radiant heating.

[0108] Based on the above, a natural fluorine and ground water air conditioning system 100 is proposed, that is, the air conditioning system 100 includes at least a first system 2 and a second system 3 at the same time.

[0109] Among them, the first system 2 can be set up indoors, the first system 2 is an air-conditioning system 100, the first system 2 at least includes a first system heat exchanger 21 for heat exchange, multiple first systems 2 constitute a multi-split air-conditioning system 100, the second system 3 is a water heating system, and the second system 3 at least includes a second system heat exchanger 31 for heat exchange.

[0110] However, the system block diagram of the related natural fluorine and ground water air conditioning system 100 is shown in FIG. Figure 2 On the basis of the original multi-split air conditioning system 100 , a second system 3 is connected in parallel to the first system heat exchanger 21 , specifically the second system heat exchanger 31 of the second system 3 .

[0111] Cooling is achieved through the first system 2, and heating is achieved through the second system 3, thereby achieving terminal separation of the first system 2 and the second system 3. It can be known that the first system 2 can also achieve heating.

[0112] However, when the second system 3 is in heating operation, because the first system heat exchanger 21 acts as a condenser, the refrigerant inside it is in a high-pressure state, and there is heat leakage when the high-pressure refrigerant exchanges heat with the heat exchanger, resulting in low efficiency and high usage costs when the second system 3 is in heating operation.

[0113] Similarly, when the first system 2 is in heating operation, since the second system heat exchanger 31 acts as a condenser, the refrigerant inside it is in a high-pressure state. The high-pressure refrigerant flows and exchanges heat with the external wind field, which will cause heat leakage and energy loss, and will also reduce efficiency and increase usage costs.

[0114] To solve the above problems, refer to Figure 3 The air-conditioning system 100 in this application adjusts the original four-way valve 61 and connects electromagnetic valves in parallel at the air intake and exhaust ports of the compressor 1, which are respectively connected to the first system 2 and the second system 3. That is, the four electromagnetic valves are connected to the air intake and exhaust ports of the compressor 1 through two routes, respectively, to realize a basic twin system with end separation of the first system 2 and the second system 3.

[0115] The first system 2 and the second system 3 have exactly the same functions. When the first system 2 is in heating operation, the second system heat exchanger 31 of the second system 3 is placed in a low-pressure area through the control of the solenoid valve to avoid heat leakage.

[0116] Similarly, when the second system 3 is in heating operation, the first system heat exchanger 21 of the first system 2 is placed in a low-pressure zone through control of the solenoid valve, thereby avoiding heat leakage of the first system heat exchanger 21 .

[0117] In addition to making the above adjustments, refer to Figure 3A first sub-expansion valve 91 can be added to the side of the first system heat exchanger 21 close to the outdoor heat exchanger 4, and a second sub-expansion valve 92 can be added to the end of the second system heat exchanger 31 close to the outdoor heat exchanger 4. The first system 2 and the second system 3 have completely symmetrical functions.

[0118] Specifically, the connection point between the first system heat exchanger 21, the second system heat exchanger 31, and the outdoor heat exchanger 4 is defined as the first connection point. The first sub-expansion valve 91 is disposed at one end of the first connection point close to the first system heat exchanger 21, and the second sub-expansion valve 92 is disposed at one end of the first connection point close to the second system heat exchanger 31. This allows the first sub-expansion valve 91 and the second sub-expansion valve 92 to perform an expansion process in some operating conditions.

[0119] In the heating cycle or cooling cycle, by reasonably controlling the switching of each solenoid valve and the working state of the expansion valve, the first system 2 and the second system 3 can complete the heating operation or cooling operation on the basis of improving the efficiency of the entire air-conditioning system 100.

[0120] The air-conditioning system 100 in the present application includes an indoor part and an outdoor part, and the outdoor part and the indoor part are connected by a refrigerant pipe 103. In order to facilitate the installation of the indoor part and the outdoor part, a shut-off valve is provided at the connection between the indoor part and the outdoor part.

[0121] Reference Figure 4 The air conditioning system 100 includes a first rough stop valve 11, a second rough stop valve 12, a first fine stop valve 13 and a second fine stop valve 14. The refrigerant in the refrigerant pipeline 103 can be connected or blocked by opening and closing the stop valves.

[0122] Specifically, the first rough stop valve 11 is provided on a side of the first system heat exchanger 21 close to the compressor 1 , and the second rough stop valve 12 is provided on a side of the second system heat exchanger 31 close to the compressor 1 .

[0123] The first fine stop valve 13 is provided on a side of the first system heat exchanger 21 close to the outdoor heat exchanger 4 , and the second fine stop valve 14 is provided on a side of the second system heat exchanger 31 close to the outdoor heat exchanger 4 .

[0124] In some embodiments of the present application, reference is made to Figure 4 The air conditioning system 100 includes a compressor 1, at least one first system 2, a second system 3, a main expansion valve 5, and an outdoor heat exchanger 4, and refrigerant circulates inside the system.

[0125] The compressor 1 is used to compress the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and output it. The compressor 1 includes an air intake port and an air exhaust port for communicating with other components.

[0126] The first system 2 includes a first system heat exchanger 21 , which can be used to perform heat exchange with the indoor wind farm.

[0127] The second system 3 includes a second system heat exchanger 31 , which can be used to perform heat exchange with the water circulation component 102 .

[0128] The outdoor heat exchanger 4 is connected to the first system heat exchanger 21 and the second system heat exchanger 31 through pipelines 103 respectively. The outdoor heat exchanger 4 is used to perform heat exchange with the outdoor wind farm.

[0129] The main expansion valve 5 is connected to the outdoor heat exchanger 4 and is used to expand the high-temperature and high-pressure liquid refrigerant into a low-pressure liquid refrigerant. Specifically, the main expansion valve 5 is arranged on the side of the first connection point close to the outdoor heat exchanger 4.

[0130] In order to adjust the flow direction of the refrigerant between various components, the air conditioning system 100 further includes a first solenoid valve 71 , a second solenoid valve 72 , a third solenoid valve 73 , a fourth solenoid valve 74 and a connecting valve 6 .

[0131] Among them, the connecting valve 6 includes three openings, which are defined as D opening, C opening and S opening respectively. The D opening is connected to the exhaust port of the compressor 1, the C opening is connected to the outdoor heat exchanger 4, and the S opening is connected to the intake port of the compressor 1.

[0132] In some embodiments, the communication valve 6 may be configured as a four-way valve 61 , and the E opening of the four-way valve 61 may be closed for use.

[0133] In the above description, the first solenoid valve 71 is provided between the compressor 1 and the second system heat exchanger 31. Specifically, one end of the first solenoid valve 71 is connected to the exhaust port of the compressor 1, and the other end is connected to the second system heat exchanger 31.

[0134] The second solenoid valve 72 is disposed between the compressor 1 and the first system heat exchanger 21. Specifically, one end of the second solenoid valve 72 is connected to the exhaust port of the compressor 1, and the other end is connected to the first system heat exchanger 21.

[0135] The third solenoid valve 73 is disposed between the compressor 1 and the second system heat exchanger 21. Specifically, one end of the third solenoid valve 73 is connected to the air intake of the compressor 1, and the other end is connected to the second system heat exchanger 31 connected to one end of the first solenoid valve 71.

[0136] The fourth solenoid valve 74 is provided between the compressor 1 and the first system heat exchanger 21. Specifically, one end of the fourth solenoid valve 74 is connected to the air intake of the compressor 1, and the other end is connected to the first system heat exchanger 21 connected to one end of the second solenoid valve 72.

[0137] Specifically, refer to Figure 4The pipe 103 of the exhaust port of the compressor 1 is divided into three paths, one path is connected to the D opening of the communication valve 6, one path is connected to one end of the first solenoid valve 71, and one path is connected to one end of the second solenoid valve 72.

[0138] The pipeline 103 connected to the first solenoid valve 71 is connected to the second system heat exchanger 31. A refrigerant pipeline 103 is led out between the first solenoid valve 71 and the second system heat exchanger 31, and a third solenoid valve 73 is arranged on the refrigerant pipeline 103. One end of the third solenoid valve 73 is connected to the pipeline 103 of the suction port of the compressor 1. The third solenoid valve 73 is used to control whether the suction port of the compressor 1 is connected to the second system heat exchanger 31.

[0139] The pipeline 103 connected to the second solenoid valve 72 is in communication with the first system heat exchanger 21. A refrigerant pipeline 103 is led between the second solenoid valve 72 and the first system heat exchanger 21. A fourth solenoid valve 74 is provided on this refrigerant pipeline 103. One end of the fourth solenoid valve 74 is connected to the pipeline 103 connected to the air intake of the compressor 1. The fourth solenoid valve 74 is used to control whether the air intake of the compressor 1 is in communication with the first system heat exchanger 21.

[0140] In some embodiments, the first system 2 further includes a first sub-expansion valve 91. Each first system heat exchanger 21 is equipped with a first sub-expansion valve 91. The first sub-expansion valve 91 is disposed on a side of the first system heat exchanger 21 away from the compressor 1. Specifically, the first sub-expansion valve 91 is disposed on an end of the first sub-expansion valve that is close to the first system heat exchanger 21.

[0141] In some embodiments, the second system 3 further includes a second sub-expansion valve 92 , which is disposed at one end of the second fine expansion valve close to the second system heat exchanger 31 .

[0142] By controlling the opening and working state of each solenoid valve and expansion valve, the first sub-expansion valve 91 and the second sub-expansion valve 92 are made to perform an expansion process in some working conditions.

[0143] To further enhance the heating effect of the second system 3, the second system 3 also includes a floor heater 101. The floor heater 101 can be installed indoors to exchange heat with the indoor wind farm. As can be seen, the second system 3 is primarily used to heat the room and raise the indoor temperature. The floor heater 101 is connected to the second system heat exchanger 31 via a water circulation component 102.

[0144] Specifically, the water in the floor heating 101 is connected to the water circulation of the water circulation component 102. The water circulation component 102 can be set on one side of the second system heat exchanger 31 to facilitate heat exchange between the water in the water circulation component 102 and the second system heat exchanger 31 to heat or cool the water in the water circulation component 102.

[0145] The water circulation component 102 may include a pipeline 103, a water pump 104 and an expansion tank 105, wherein the pipeline 103 is connected to the floor heating 101, and the pipeline 103 is arranged on one side of the second system heat exchanger 31; the water pump 104 is arranged on the pipeline 103 to provide power for water circulation; the expansion tank 105 is arranged on the pipeline 103 to balance the water volume and pressure in the pipeline 103.

[0146] In the embodiment shown in this application, the air conditioning system 100 further includes a controller 8. Controller 8 is a device that generates an operation control signal based on an instruction operation code and a timing signal, thereby instructing the air conditioner to execute the control instruction. For example, in response to a received user instruction, controller 8 may execute the operation related to the compressor 1, solenoid valve, and expansion valve associated with the instruction.

[0147] The embodiment of the present application also provides a hardware structure diagram of a controller 8, such as Figure 12 As shown, the controller 8 includes a processor 83 and, optionally, a memory 82 and a communication interface 84 connected to the processor 83. The processor 83, the memory 82 and the communication interface 84 are connected via a bus 81.

[0148] The processor 83 may be a central processing unit (CPU), a general-purpose processor (GP), a network processor (NP), a digital signal processor (DSP), a microprocessor (MCU), a microcontroller (MCU), a programmable logic device (PLD), or any combination thereof. The processor 83 may also be any other device having processing functionality, such as a circuit, a device, or a software module. The processor 83 may also include multiple CPUs, and the processor 83 may be a single-CPU processor or a multi-CPU processor. The processor 83 herein may refer to one or more devices, circuits, or processing cores for processing data (e.g., computer program instructions).

[0149] The memory 82 can be a read-only memory 82 (ROM) or other types of static storage devices that can store static information and instructions, a random access memory 82 (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory 82 (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer. The embodiment of the present application does not impose any restrictions on this. The memory 82 can exist independently or be integrated with the processor 83. Among them, the memory 82 can contain computer program code. The processor 83 is used to execute the computer program code stored in the memory 82, thereby implementing the control method of the multi-split air conditioner 100 system provided in the embodiment of the present application.

[0150] The communication interface 84 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.). The communication interface 84 can be a module, a circuit, a transceiver or any device that can achieve communication.

[0151] The bus 81 may be a peripheral component interconnect (PCI) bus 81 or an extended industry standard architecture (EISA) bus 81. The bus 81 may be divided into an address bus 81, a data bus 81, a control bus 81, etc. For ease of representation, Figure 11 Only one thick line is used in the figure, but it does not mean that there is only one bus 81 or one type of bus 81.

[0152] In some implementations of this embodiment, the air conditioning system 100 may form at least a first refrigerant circuit and a second refrigerant circuit, and the first refrigerant circuit and the second refrigerant circuit may work independently. Figure 5 The first refrigerant circuit includes a compressor 1, a second solenoid valve 72, a first system heat exchanger 21, a main expansion valve 5, and an outdoor heat exchanger 4; Figure 6 The second refrigerant circuit includes a compressor 1 , a first solenoid valve 71 , a second system heat exchanger 31 , a main expansion valve 5 , and an outdoor heat exchanger 4 .

[0153] The controller 8 is configured to, when receiving the first signal, close the second solenoid valve 72, open the first solenoid valve 71, close the third solenoid valve 73, connect the S opening and the C opening of the communication valve 6, and open the fourth solenoid valve 74, so that the first system heat exchanger 21 is connected to the suction port of the compressor 1, so that the refrigerant in the first system heat exchanger 21 is in a low-pressure gaseous state;

[0154] At this time, refer to Figure 7 After the refrigerant flows out from the exhaust port of the compressor 1, it passes through the first solenoid valve 71 and flows into the second system heat exchanger 31. After the second system heat exchanger 31 exchanges heat with the water in the water circulation component 102, it undergoes the expansion effect of the main expansion valve 5 and flows back to the intake port of the compressor 1 through the outdoor heat exchanger 4.

[0155] It should be noted that when the controller 8 receives the first signal, it controls the second system 3 to operate in heating mode and controls the first system 2 to not operate. In heating mode, indoor air enters the indoor unit and exchanges heat with the indoor heat exchanger before flowing out, raising the indoor ambient temperature.

[0156] During the above operation, the second system 3 operates in heating mode, while the first system 2 is inactive, to achieve heating of the indoor space. The reason for not using the first system 2 for heating in this process is that the air conditioning system 100 provides poor heating comfort, while the water heating system can achieve heating of the floor heating 101, which provides better comfort.

[0157] Of course, the technical solution in this application can enable the first system 2 and the second system 3 to operate in heating mode simultaneously.

[0158] In some embodiments, the second system heat exchanger 31 is configured as a water-fluorine heat exchanger. The working principle of the water-fluorine heat exchanger is as follows: through a plate heat exchanger, one channel is for refrigerant and the other channel is for water, and the two exchange heat.

[0159] Reference Figure 7 , the connecting valve 6 is set as a four-way valve 61 as an example for explanation.

[0160] Compressor 1 discharges high-temperature and high-pressure gaseous refrigerant, the first solenoid valve 71 is in the power-on open state, the second solenoid valve 72 is in the power-off closed state, the third solenoid valve 73 is in the power-off closed state, the fourth solenoid valve 74 is in the power-on open state, the four-way valve 61 is in the power-on state, the D opening and the E opening of the four-way valve 61 are connected, and the C opening and the S opening are connected. Since the E opening is blocked, the refrigerant cannot flow here.

[0161] Since the second solenoid valve 72 is in the power-off closed state, no high-temperature and high-pressure gaseous refrigerant flows into the first system 2 .

[0162] The high-temperature and high-pressure gaseous refrigerant enters the second system 3 through the first solenoid valve 71 which is in the power-on open state, passes through the second rough stop valve 12, and enters the water-fluorine heat exchanger. The high-temperature and high-pressure gaseous refrigerant exchanges heat with the circulating water in the water-fluorine heat exchanger, and the refrigerant condenses and releases heat to become high-pressure liquid refrigerant.

[0163] The refrigerant passes through the second fine stop valve 14 and is throttled and depressurized in the main expansion valve 5 to become a low-pressure liquid refrigerant.

[0164] The low-pressure liquid refrigerant absorbs heat in the indoor heat exchanger and evaporates into a low-pressure gaseous refrigerant, which then enters the suction port of the compressor 1 through the C and S ports of the four-way valve 61, forming a refrigerant cycle.

[0165] During this process, all the first sub-expansion valves 91 corresponding to the first system 2 are closed, and no refrigerant flows in the first system heat exchanger 21 .

[0166] By opening the fourth solenoid valve 74, the first system heat exchanger 21 and the air intake of the compressor 1 are connected, the first system heat exchanger 21 is in a low-pressure state, and the refrigerant of the first system heat exchanger 21 is all low-pressure gaseous refrigerant, which accounts for a very small proportion. At the same time, the second solenoid valve 72 and the first sub-expansion valve 91 are both in the power-off closed state, the refrigerant inlet of the first system heat exchanger 21 is cut off, and there is no flow of refrigerant in the first system heat exchanger 21, and no heat leakage, thereby ensuring the normal operation of the entire system.

[0167] In this application, an outdoor heat exchanger 4 is used. In combination with refrigeration principles, a connecting valve 6 is used in conjunction with four solenoid valves to be controlled in parallel on the suction and exhaust sides of the compressor 1. This generates a mutually independent first system 2 and a second system 3, both of which can perform cooling and heating. The first system 2 and the second system 3 are completely symmetrical twin systems. This allows for applications where the cooling and heating terminals are separated, such as cooling and heating at the terminal of the air-conditioning system 100. At the same time, heat can be released through water pipes laid under the floor to achieve radiant heating or hot water production from the water floor heating 101.

[0168] In some implementations of this embodiment, the controller 8 is configured to, when the controller 8 receives the fourth signal, close the first solenoid valve 71, open the second solenoid valve 72, close the fourth solenoid valve 74, connect the S opening and the C opening, fully open the main expansion valve 5, and open the third solenoid valve 73;

[0169] The second system heat exchanger 31 is connected to the air intake port of the compressor 1, and the refrigerant in the second system heat exchanger 31 is in a low-pressure gaseous state;

[0170] Reference Figure 8The refrigerant flow direction under the above valve switch working state is: the refrigerant flows out from the exhaust port of the compressor 1, enters the first system heat exchanger 21 through the second solenoid valve 72, and the refrigerant in the first system heat exchanger 21 exchanges heat with the indoor wind field and then flows back to the intake port of the compressor 1 through the main expansion valve 5 used for throttling and the outdoor heat exchanger 4.

[0171] It should be noted that when the controller 8 receives the fourth signal, it controls the first system 2 to operate in heating mode and controls the second system 3 to not operate. In heating mode, indoor air enters the indoor unit and exchanges heat with the indoor heat exchanger before flowing out, raising the indoor ambient temperature.

[0172] When the first system 2 operates in heating mode and the second system 3 does not operate, refer to Figure 8 , the following description is made by taking the case where the connecting valve 6 is set as a four-way valve 61 and the air-conditioning system 100 includes a plurality of first systems 2 as an example.

[0173] Compressor 1 discharges high-temperature and high-pressure gaseous refrigerant, the second solenoid valve 72 is in the power-on open state, the first solenoid valve 71 is in the power-off closed state, the fourth solenoid valve 74 is in the power-off closed state, the third solenoid valve 73 is in the power-on open state, the four-way valve 61 is in the power-on state, the D opening and the E opening of the four-way valve 61 are connected, and the C opening and the S opening are connected. Since the E opening is blocked, the refrigerant cannot flow here.

[0174] Since the first solenoid valve 71 is in the power-off closed state, no high-temperature and high-pressure gaseous refrigerant flows into the second system 3 .

[0175] The high-temperature and high-pressure gaseous refrigerant enters the first system 2 through the second solenoid valve 72 in the power-on open state, passes through the first rough stop valve 11, and enters the indoor heat exchanger Bn. The high-temperature and high-pressure gaseous refrigerant exchanges heat with the circulating water in the indoor heat exchanger, and the refrigerant condenses and releases heat to become high-pressure liquid refrigerant.

[0176] The first sub-expansion valve 91 corresponding to the turned-on indoor heat exchanger remains fully open, and the first sub-expansion valve 91 corresponding to the turned-off indoor heat exchanger maintains a smaller opening to maintain the pressure requirement of the pipeline 103 in the air-conditioning system 100.

[0177] The refrigerant passes through the first fine stop valve 13 and is throttled and reduced in pressure in the main expansion valve 5 to become a low-pressure liquid refrigerant.

[0178] The low-pressure liquid refrigerant absorbs heat in the indoor heat exchanger and evaporates into a low-pressure gaseous refrigerant, which then enters the suction port of the compressor 1 through the C and S ports of the four-way valve 61, forming a refrigerant cycle.

[0179] During this process, the second sub-expansion valve 92 corresponding to the second system 3 is closed, and no refrigerant flows in the second system heat exchanger 31 .

[0180] By opening the third solenoid valve 73, the second system heat exchanger 31 and the air intake of the compressor 1 are connected, the second system heat exchanger 31 is in a low-pressure state, and the refrigerant of the second system heat exchanger 31 is all low-pressure gaseous refrigerant, which accounts for a very small proportion. At the same time, the first solenoid valve 71 and the second sub-expansion valve 92 are both in a power-off closed state, the refrigerant inlet of the second system heat exchanger 31 is cut off, and there is no flow of refrigerant in the second system heat exchanger 31, and no heat leakage, thereby ensuring the normal operation of the entire system.

[0181] In some implementations of this embodiment, the controller 8 is configured to, when the controller 8 receives the third signal, close the second solenoid valve 72, close the first solenoid valve 71, open the fourth solenoid valve 74, connect the D opening of the communication valve 6 to the C opening, open all the main expansion valves 5, open the corresponding sub-expansion valves, open the third solenoid valve 73, and connect the second system heat exchanger 31 to the suction port of the compressor 1 through the third solenoid valve 73, so that the refrigerant in the second system heat exchanger 31 is in a low-pressure gaseous state;

[0182] Reference Figure 9 The refrigerant flow direction under the above valve switch working state is that the refrigerant flows out from the exhaust port of the compressor 1 into the outdoor heat exchanger 4, passes through the corresponding sub-expansion valve into the corresponding first system heat exchanger 21, and then passes through the fourth solenoid valve 74 into the intake port of the compressor 1.

[0183] It should be noted that when the controller 8 receives the third signal, it controls the first system 2 to operate in cooling mode and controls the second system 3 to not operate. In cooling mode, indoor air enters the indoor unit and exchanges heat with the indoor heat exchanger before flowing out, lowering the indoor ambient temperature.

[0184] When the first system 2 operates in cooling mode and the second system 3 does not operate, refer to Figure 9 , the following description is made by taking the connecting valve 6 as a four-way valve 61 and the air-conditioning system 100 including a plurality of first systems 2 as an example.

[0185] Compressor 1 discharges high-temperature and high-pressure gaseous refrigerant, the first solenoid valve 71 is in the power-off closed state, the second solenoid valve 72 is in the power-off closed state, there is no refrigerant flowing between the first solenoid valve 71 and the second solenoid valve 72, the third solenoid valve 73 is in the power-on open state, and the fourth solenoid valve 74 is in the power-on open state.

[0186] The four-way valve 61 is in the off state, and the D port is connected to the C port. The high-temperature and high-pressure gaseous refrigerant enters the outdoor heat exchanger 4 through the D port and the C port, condenses and releases heat to become a high-pressure liquid refrigerant.

[0187] The main expansion valve 5 is fully open and does not perform throttling. The second sub-expansion valve 92 is closed, and no refrigerant enters the second system heat exchanger 31 through the second sub-expansion valve 92. The first sub-expansion valve 91 is throttled when it is turned on, and the second sub-expansion valve 92 is closed when it is turned off.

[0188] The high-pressure liquid refrigerant entering the first system 2 is throttled and reduced in pressure to a low-pressure liquid refrigerant through the first sub-expansion valve 91 corresponding to each first-system heat exchanger 21. The low-pressure liquid refrigerant absorbs heat and evaporates into a low-pressure gaseous refrigerant in the first-system heat exchanger 21.

[0189] Then the refrigerant passes through the first rough stop valve 11 and the fourth solenoid valve 74 and enters the suction port of the compressor 1 to form a refrigeration cycle.

[0190] By opening the third solenoid valve 73, the second system heat exchanger 31 and the air intake port (low-pressure air intake port) of the compressor 1 are connected, and the second system heat exchanger 31 is in a low-pressure state. The refrigerant of the second system heat exchanger 31 is all low-pressure gaseous refrigerant, which accounts for a very small proportion. At the same time, the first solenoid valve 71 and the second sub-expansion valve 92 are both in the power-off closed state, and the refrigerant inlet of the second system heat exchanger 31 is cut off. There is no flow of refrigerant in the second system heat exchanger 31, and there is no heat leakage, thereby ensuring the normal operation of the entire system.

[0191] In some implementations of this embodiment, the water in the water circulation component 102 is used to heat the room where the first system heat exchanger 21 is installed.

[0192] The air conditioning system 100 of this embodiment further includes a third refrigerant circuit. Figure 10 The third refrigerant circuit includes the compressor 1, the first solenoid valve 71, the second system heat exchanger 31, the sub-expansion valve, the first system heat exchanger 21 and the fourth solenoid valve 74, and the refrigerant circulates therein.

[0193] In some embodiments, the controller 8 is configured to, upon receiving the second signal, open the first solenoid valve 71, close the second solenoid valve 72, open the fourth solenoid valve 74, close the third solenoid valve 73, close the main expansion valve 5, and connect the C opening and the S opening of the communication valve 6 to connect the outdoor heat exchanger 4 to the air intake port;

[0194] Reference Figure 11 , the refrigerant flows out from the exhaust port of the compressor 1, enters the second system heat exchanger 31 through the first solenoid valve 71, and then passes through the corresponding sub-expansion valve, the corresponding first system heat exchanger 21, and then flows back to the suction port of the compressor 1 through the fourth solenoid valve 74;

[0195] The refrigerant in the second system heat exchanger 31 exchanges heat with the water in the water circulation component 102, and the refrigerant in the first system heat exchanger 21 exchanges heat with the indoor wind field. The water in the water circulation component 102 is used to heat the indoor temperature to compensate for the temperature drop during the dehumidification process of the first system 2.

[0196] It should be noted that, when the controller 8 receives the second signal, it controls the first system 2 to operate in the cooling mode and controls the second system 3 to operate in the heating mode.

[0197] Reference Figure 9 Compressor 1 discharges high-temperature, high-pressure gaseous refrigerant. At this time, first solenoid valve 71 is powered on and open, second solenoid valve 72 is disconnected and closed, third solenoid valve 73 is powered off and closed, fourth solenoid valve 74 is powered on and open, and four-way valve 61 is powered on. High-pressure gaseous refrigerant passes through openings D and E of four-way valve 61. Since opening E is closed, the refrigerant is blocked there. Main expansion valve 5 remains closed.

[0198] The second solenoid valve 72 is in a power-off closed state, and no high-temperature and high-pressure gaseous refrigerant flows into the first system 2 .

[0199] The high-temperature and high-pressure gaseous refrigerant enters the second system 3 through the first solenoid valve 71, and enters the water-fluorine heat exchanger through the second rough stop valve 12. The high-temperature and high-pressure gaseous refrigerant exchanges heat with the circulating water in the water-fluorine heat exchanger, and the refrigerant in the water-fluorine heat exchanger condenses and releases heat to become high-pressure liquid refrigerant.

[0200] After passing through the second fine stop valve 14, no refrigerant flows into the outdoor heat exchanger 4 because the main expansion valve 5 is in a fully closed state.

[0201] The high-pressure liquid refrigerant enters the first system 2 through the second fine shut-off valve 14 and is throttled by the corresponding first sub-expansion valve 91 in the first system 2. The first sub-expansion valve 91 corresponding to the first system heat exchanger 21 that is powered on is throttled, while the first sub-expansion valve 91 corresponding to the first system heat exchanger 21 that is powered off is closed. The throttled low-pressure liquid refrigerant evaporates within each first system heat exchanger 21 (indoor heat exchanger), absorbing heat and generating cooling, before evaporating into a low-pressure gaseous refrigerant. The refrigerant then enters the intake port of the compressor 1 through the fourth solenoid valve 74, completing the refrigerant cycle.

[0202] At the same time, the C opening and the S opening of the four-way valve 61 are connected to keep the outdoor heat exchanger 4 in a low-pressure state, so that refrigerant will not be stored and heat leakage will not occur, thereby ensuring the normal operation of the entire air-conditioning system 100.

[0203] It should be noted that the water heating system in this application can also replace the water tank to produce hot water. Specifically, the above-mentioned floor heating 101 can be replaced with a water tank, and the water heated by the second system heat exchanger 31 can be collected in the water tank, and the user can take hot water from the water tank.

[0204] At the same time, an unloading system and an oil return system can also be added to the suction and exhaust ports of the compressor 1 to meet the needs of more diverse users.

[0205] The water module corresponding to the present invention can also replace the water tank to produce hot water. The functional system process will not be repeated. At the same time, an unloading system and an oil return system can also be added to the suction and exhaust ports of the compressor 1, which will not be described in detail.

[0206] This application proposes an air conditioning system 100, which includes a first system 2, a second system 3, an outdoor heat exchanger 4, a compressor 1 including an air intake and an air exhaust port, and a main expansion valve 5. The first system 2 includes a first system heat exchanger 21 for performing heat exchange with an indoor wind farm, and the second system 3 includes a second system heat exchanger 31 for performing heat exchange with a water circulation component 102. The air conditioning system 100 also includes a communication valve 6, a first solenoid valve 71, a second solenoid valve 72, a third solenoid valve 73, and a fourth solenoid valve 74.

[0207] When the controller 8 receives the first signal, it closes the second solenoid valve 72, opens the first solenoid valve 71, closes the third solenoid valve 73, connects the S opening with the C opening, and opens the fourth solenoid valve 74 to connect the first system heat exchanger 21 with the air intake port, so that the refrigerant in the first system heat exchanger 21 is in a low-pressure gaseous state. At this time, the other refrigerant interfaces of the first system heat exchanger 21 are cut off, there is no flow and no heat leakage, thereby ensuring the normal operation of the entire system.

[0208] In the above process, after the refrigerant flows out from the exhaust port of the compressor 1, it flows into the second system heat exchanger 31 and the main expansion valve 5 through the first solenoid valve 71, and then flows back to the intake port of the compressor 1 through the outdoor heat exchanger 4, realizing the refrigerant circulation.

[0209] Compared with the current combined natural fluorine and ground water air-conditioning system 100, the air-conditioning system 100 in the present application realizes the separation of the system terminals. When the terminal of the second system 3 is in operation, the control of the solenoid valve can realize the absence of heat leakage of the high-pressure liquid refrigerant in the terminal of the first system 2, thereby greatly reducing the heat loss and improving the economic efficiency of use. When the above technical solution is used in heating operation, the cost is reduced by more than 20%. At the same time, it is flexible to use. It can be heated by the air-conditioning terminal, or by the floor heating 101 terminal or by the water tank to produce hot water.

[0210] In some embodiments of the present application, the air conditioning system 100 includes a compressor 1, at least one first system 2, a second system 3 for performing heat exchange in the room where the first system 2 is located, an outdoor heat exchanger 4, and a main expansion valve 5. Refrigerant flows therein.

[0211] The compressor 1 is used to compress the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and output it. The compressor 1 includes an air intake port and an air exhaust port.

[0212] The first system 2 includes a first system heat exchanger 21 and a sub-expansion valve. The first system heat exchanger 21 is used to exchange heat with the indoor wind field. The sub-expansion valve is connected to the first system heat exchanger 21 and is used to throttle the refrigerant.

[0213] The second system 3 includes a second system heat exchanger 31 , which is used for performing heat exchange with the water circulation component 102 .

[0214] The outdoor heat exchanger 4 is connected to the first system heat exchanger 21 and the second system heat exchanger 31 through the refrigerant circulation pipeline 103. The outdoor heat exchanger 4 is used to exchange heat with the outdoor wind farm;

[0215] The main expansion valve 5 is connected to the outdoor heat exchanger 4 and is used to expand the high-temperature and high-pressure liquid refrigerant into a low-pressure liquid refrigerant;

[0216] In order to adjust the working states of the first system heat exchanger 21 and the second system heat exchanger 31 , the air conditioning system 100 further includes a communication valve 6 , a first solenoid valve 71 , a second solenoid valve 72 , a third solenoid valve 73 and a fourth solenoid valve 74 .

[0217] The connecting valve 6 includes three openings, which are defined as D opening, C opening and S opening respectively. The D opening is connected to the exhaust port, the C opening is connected to the outdoor heat exchanger 4, and the S opening is connected to the intake port.

[0218] One end of the first solenoid valve 71 is connected to the exhaust port of the compressor 1 , and the other end of the first solenoid valve 71 is connected to the second system heat exchanger 31 ;

[0219] One end of the second solenoid valve 72 is connected to the exhaust port of the compressor 1, and the other end of the second solenoid valve 72 is connected to the first system heat exchanger 21;

[0220] One end of the third solenoid valve 73 is connected to the air intake port of the compressor 1 , and the other end of the third solenoid valve 73 is connected to the second system heat exchanger 31 ;

[0221] One end of the fourth solenoid valve 74 is connected to the air intake port of the compressor 1 , and the other end of the fourth solenoid valve 74 is connected to the first system heat exchanger 21 ;

[0222] The detailed hardware settings are consistent with the above technical solution and will not be repeated here.

[0223] In some embodiments, the controller 8 is configured to, upon receiving the second signal, open the first solenoid valve 71, close the second solenoid valve 72, open the fourth solenoid valve 74, close the third solenoid valve 73, connect the C opening and the S opening of the communication valve 6, and close the main expansion valve 5;

[0224] The refrigerant flows out of the exhaust port of the compressor 1, passes through the first solenoid valve 71 and enters the second system heat exchanger 31. Then, the refrigerant passes through the corresponding sub-expansion valve and the corresponding first system heat exchanger 21 and flows back to the intake port of the compressor 1.

[0225] The refrigerant in the second system heat exchanger 31 exchanges heat with the water in the water circulation component 102, and the refrigerant in the first system heat exchanger 21 exchanges heat with the indoor wind field. The heat reduced during the dehumidification process of the first system 2 is used to heat the water in the water circulation component 102, and the water in the water circulation component 102 is used to heat the indoor temperature to compensate for the temperature drop during the dehumidification process of the first system 2.

[0226] In some implementations of this embodiment, the second system 3 further includes floor heating 101 , which is installed indoors and is used for heat exchange with the indoor wind field. The floor heating 101 is connected to the second system heat exchanger 31 through a water circulation component 102 .

[0227] This application proposes an air conditioning system 100, which includes a first system 2, a second system 3, an outdoor heat exchanger 4, a compressor 1 including an air intake and an air exhaust port, and a main expansion valve 5. The first system 2 includes a first system heat exchanger 21 for performing heat exchange with an indoor wind farm, and the second system 3 includes a second system heat exchanger 31 for performing heat exchange with a water circulation component 102. The air conditioning system 100 also includes a communication valve 6, a first solenoid valve 71, a second solenoid valve 72, a third solenoid valve 73, and a fourth solenoid valve 74.

[0228] When receiving the second signal, the first solenoid valve 71 is opened, the second solenoid valve 72 is closed, the fourth solenoid valve 74 is opened, and the third solenoid valve 73 is closed. The C opening and the S opening of the communication valve 6 are connected, and the main expansion valve 5 is closed.

[0229] In the above process, the refrigerant flows out from the exhaust port of the compressor 1, passes through the first solenoid valve 71 and enters the second system heat exchanger 31, then passes through the corresponding sub-expansion valve and the corresponding first system heat exchanger 21 and flows back to the intake port of the compressor 1;

[0230] The refrigerant in the second system heat exchanger 31 exchanges heat with the water in the water circulation component 102, and the refrigerant in the first system heat exchanger 21 exchanges heat with the indoor wind field. The heat reduced during the dehumidification process of the first system 2 is used to heat the water in the water circulation component 102, and the water in the water circulation component 102 is used to heat the indoor temperature to compensate for the temperature drop during the dehumidification process of the first system 2.

[0231] Compared with the current combined natural fluorine and ground water air-conditioning system 100, the air-conditioning system 100 in the present application forms a third refrigerant circuit. In the third refrigerant circuit, the first system heat exchanger 21 is used as an evaporator, and the second system heat exchanger 31 is used as a condenser. During the indoor dehumidification process, the heat released by the second system 3 is used to compensate for the temperature reduced by dehumidification, so that the temperature does not decrease during the dehumidification process, thereby improving the user's comfort.

[0232] At the same time, by reasonably setting the refrigerant circuit, the heat originally released to the outside during the dehumidification process is recovered and used to heat the water in the water circulation component 102 in the second system 3, thereby improving the energy utilization efficiency.

[0233] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An air conditioning system, characterized in that: include: A compressor, which is used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and output it, and the compressor includes an air intake port and an air exhaust port; At least one first system, the first system comprising: The first system heat exchanger is used for exchanging heat with the indoor wind farm; A second system, the second system comprising: A second system heat exchanger, which is used to exchange heat with a water circulation component, and the water circulation component can be used to exchange heat with the indoor wind farm; The air conditioning system further comprises: an outdoor heat exchanger, which is connected to the first system heat exchanger and the second system heat exchanger through pipelines, and is used to exchange heat with an outdoor wind farm; a main expansion valve connected to the outdoor heat exchanger and used to expand the high-temperature and high-pressure liquid refrigerant into a low-pressure liquid refrigerant; a communication valve, the communication valve including three openings, the three openings being defined as a D opening, a C opening, and an S opening, the D opening being connected to the exhaust port, the C opening being connected to the outdoor heat exchanger, and the S opening being connected to the intake port; a first solenoid valve, one end of which is connected to the exhaust port of the compressor, and the other end of which is connected to the second system heat exchanger; a second solenoid valve, one end of which is connected to the exhaust port of the compressor, and the other end of which is connected to the first system heat exchanger; a third solenoid valve, one end of which is connected to the suction port of the compressor, and the other end of which is connected to the second system heat exchanger and one end of which is connected to the first solenoid valve; a fourth solenoid valve, one end of which is connected to the air intake port of the compressor, and the other end of which is connected to the first system heat exchanger and one end of which is connected to the second solenoid valve; a first refrigerant circuit, comprising the compressor, the second solenoid valve, the first system heat exchanger, the main expansion valve, and the outdoor heat exchanger; a second refrigerant circuit, comprising the compressor, the first solenoid valve, the second system heat exchanger, the main expansion valve, and the outdoor heat exchanger; The first refrigerant circuit and the second refrigerant circuit can operate independently; The controller is configured to, when receiving a first signal, close the second solenoid valve, open the first solenoid valve, close the third solenoid valve, connect the S opening with the C opening, and open the fourth solenoid valve, so that the first system heat exchanger is connected with the air intake port, so that the refrigerant in the first system heat exchanger is in a low-pressure gaseous state; After flowing out of the exhaust port of the compressor, the refrigerant flows into the second system heat exchanger and the main expansion valve through the first solenoid valve, and then flows back to the intake port of the compressor through the outdoor heat exchanger.

2. The air conditioning system according to claim 1, characterized in that The water in the water circulation assembly is used to heat the room where the first system heat exchanger is installed; the first system also includes: a first sub-expansion valve, the first sub-expansion valve being arranged on a side of the first system heat exchanger away from the compressor; a third refrigerant circuit, comprising the compressor, the first solenoid valve, the second system heat exchanger, the first sub-expansion valve, the first system heat exchanger, and the fourth solenoid valve; The controller is configured to, upon receiving a second signal, open the first solenoid valve, close the second solenoid valve, open the fourth solenoid valve, close the third solenoid valve, close the main expansion valve, and connect the C opening and the S opening of the communication valve to connect the outdoor heat exchanger to the air intake port; The refrigerant flows out from the exhaust port of the compressor, enters the second system heat exchanger through the first solenoid valve, then passes through the corresponding first sub-expansion valve, the corresponding first system heat exchanger, and then flows back to the intake port of the compressor through the fourth solenoid valve; The refrigerant in the second system heat exchanger exchanges heat with the water in the water circulation component, and the refrigerant in the first system heat exchanger exchanges heat with the indoor wind field. The water in the water circulation component is used to heat the indoor temperature to compensate for the temperature drop during the dehumidification process of the first system.

3. The air conditioning system according to claim 2, characterized in that The controller is configured to: After receiving the third signal, the second solenoid valve is closed, the first solenoid valve is closed, the fourth solenoid valve is opened, the D opening of the communication valve is connected to the C opening, the main expansion valve is fully opened, the corresponding first sub-expansion valve is opened, the third solenoid valve is opened, and the second system heat exchanger is connected to the suction port of the compressor through the third solenoid valve, so that the refrigerant in the second system heat exchanger is in a low-pressure gaseous state; The refrigerant flows out from the exhaust port of the compressor into the outdoor heat exchanger, passes through the corresponding first sub-expansion valve into the corresponding first system heat exchanger, and then passes through the fourth solenoid valve into the intake port of the compressor.

4. The air conditioning system according to claim 1, characterized in that The controller is configured to: when receiving a fourth signal, close the first solenoid valve, open the second solenoid valve, close the fourth solenoid valve, connect the S opening and the C opening, fully open the main expansion valve, and open the third solenoid valve; The second system heat exchanger is connected to the air intake of the compressor, and the refrigerant in the second system heat exchanger is in a low-pressure gaseous state; The refrigerant flows out from the exhaust port of the compressor and enters the first system heat exchanger through the second solenoid valve. After the refrigerant in the first system heat exchanger exchanges heat with the indoor wind field, it flows back to the intake port of the compressor through the main expansion valve used for throttling and the outdoor heat exchanger.

5. The air conditioning system according to any one of claims 1 to 4, characterized in that: The second system further includes: Floor heating is installed indoors and is used for heat exchange with the indoor wind field. The floor heating is connected to the second system heat exchanger through the water circulation component.

6. The air conditioning system according to claim 5, characterized in that The water circulation component includes: a pipeline, which is provided on one side of the second system heat exchanger, the pipeline being in communication with the floor heating; A water pump, which is provided on the pipeline and is used to provide water circulation power; An expansion tank is provided on the pipeline and is used to balance the water volume and pressure in the pipeline.

7. The air conditioning system according to claim 2, characterized in that The air-conditioning system includes a plurality of first-system heat exchangers, each of which is provided with a first sub-expansion valve in one-to-one correspondence. During the operation of the air-conditioning system, when part of the first system is working and part of the first system is shut down, the opening of the first sub-expansion valve of the first system that is turned on remains within a preset working opening range, and the opening of the first sub-expansion valve of the first system that is shut down remains within a preset shutdown opening range.

8. The air conditioning system according to claim 1, characterized in that The communication valve may be configured as a four-way valve, with one opening being closed and the other three openings being connected to the outdoor heat exchanger, the air intake port, and the air exhaust port, respectively.

9. An air conditioning system, characterized in that: include: A compressor, which is used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and output it, and the compressor includes an air intake port and an air exhaust port; At least one first system, the first system comprising: The first system heat exchanger is used for exchanging heat with the indoor wind farm; a first sub-expansion valve connected to the first system heat exchanger; The second system is configured to perform heat exchange in the room where the first system is located, and the second system includes: A second system heat exchanger, which is used to exchange heat with the water circulation component; The air conditioning system further comprises: an outdoor heat exchanger, which is connected to the first system heat exchanger and the second system heat exchanger through refrigerant circulation pipelines, and is used to exchange heat with the outdoor wind farm; a main expansion valve connected to the outdoor heat exchanger and used to expand the high-temperature and high-pressure liquid refrigerant into a low-pressure liquid refrigerant; a communication valve, the communication valve including three openings, the three openings being defined as a D opening, a C opening, and an S opening, the D opening being connected to the exhaust port, the C opening being connected to the outdoor heat exchanger, and the S opening being connected to the intake port; a first solenoid valve, one end of which is connected to the exhaust port of the compressor, and the other end of which is connected to the second system heat exchanger; a second solenoid valve, one end of which is connected to the exhaust port of the compressor and the other end of which is connected to the first system heat exchanger; a third solenoid valve, one end of which is connected to the intake port of the compressor and the other end of which is connected to the second system heat exchanger; a fourth solenoid valve, one end of which is connected to the air intake port of the compressor, and the other end of which is connected to the first system heat exchanger; The controller is configured to, when receiving the second signal, open the first solenoid valve, close the second solenoid valve, open the fourth solenoid valve, close the third solenoid valve, connect the C opening and the S opening of the communication valve, and close the main expansion valve; The refrigerant flows out from the exhaust port of the compressor, enters the second system heat exchanger through the first solenoid valve, and then flows back to the intake port of the compressor after passing through the corresponding first sub-expansion valve and the corresponding first system heat exchanger; The refrigerant in the second system heat exchanger exchanges heat with the water in the water circulation component, and the refrigerant in the first system heat exchanger exchanges heat with the indoor wind field. The heat reduced during the dehumidification process of the first system is used to heat the water in the water circulation component, and the water in the water circulation component is used to heat the indoor temperature to compensate for the temperature drop during the dehumidification process of the first system.

10. The air conditioning system according to claim 9, characterized in that The second system further includes: Floor heating is installed indoors and is used for heat exchange with the indoor wind field. The floor heating is connected to the second system heat exchanger through the water circulation component.

Images