Triple co-generation air conditioning system

Abstract

The utility model discloses a triple co-generation air-conditioning system which comprises a refrigerant loop, a water tank, a refrigerant loop, a refrigerant loop, a refrigerant loop, a refrigerant loop, a refrigerant loop and a refrigerant loop, one end of the water pump is connected with a water outlet of the water tank; a first valve port of the first three-way valve is connected with an exhaust port of the compressor, and a second valve port of the first three-way valve is connected with a D port of the four-way valve; a refrigerant side inlet of the double-pipe heat exchanger is connected with an exhaust port of the compressor, a refrigerant side outlet of the double-pipe heat exchanger is connected with a third valve port of the first three-way valve, a water side inlet of the double-pipe heat exchanger is connected with the other end of the water pump, and a water side outlet of the double-pipe heat exchanger is connected with a water inlet of the water tank; the control valve is arranged between a refrigerant side inlet of the double-pipe heat exchanger and an exhaust port of the compressor; according to the system, the water pump and the water tank can be integrated into a whole, so that the simultaneous operation of heating / refrigerating and water heating functions is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of trigeneration air-conditioning systems, in particular to a trigeneration air-conditioning system. Background Art

[0002] At present, the trigeneration air conditioning system can realize the functions of cooling, heating and hot water, but when the user needs cooling and hot water at the same time; or when the user needs heating and hot water at the same time, the air conditioning system cannot use the heat pump to meet the above two needs at the same time. The traditional solution is to set a priority for the order of realization of cooling or heating and hot water, so as to run the functions set by the user according to the priority. When the air conditioning system has an electric heater, the electric heater and heat pump respectively realize cooling or heating and hot water, but when the air conditioning system does not have an electric heater, only one of the functions can be realized by the heat pump, so the heating / cooling and hot water functions cannot be realized at the same time. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a trigeneration air conditioning system, which can realize the simultaneous operation of heating / cooling and hot water production functions by integrating a water pump with a water tank, thereby reducing the energy consumption of the air conditioning system, and has a simple structure and is easy to implement.

[0004] In order to solve the above problems, the first embodiment of the utility model provides a trigeneration air-conditioning system, including: a refrigerant circuit, which circulates the refrigerant in a compressor, a four-way valve, an indoor heat exchanger, a liquid storage device, an economizer, an expansion valve, an outdoor heat exchanger and a gas-liquid separator; a water tank, the water tank having a water inlet and a water outlet; a water pump, one end of the water pump is connected to the water outlet of the water tank; a first three-way valve, the first valve port of the first three-way valve is connected to the exhaust port of the compressor, the second valve port of the first three-way valve is connected to the D port of the four-way valve, and the first three-way valve is used to change the flow direction of the refrigerant; a shell and tube heat exchanger, the refrigerant side inlet of the shell and tube heat exchanger is connected to the exhaust port of the compressor, and the refrigerant side outlet of the shell and tube heat exchanger is connected to the third valve port of the first three-way valve. The water side inlet of the shell and tube heat exchanger is connected to the other end of the water pump, and the water side outlet of the shell and tube heat exchanger is connected to the water inlet of the water tank. The shell and tube heat exchanger is used to exchange heat between the water in the water tank and the refrigerant under the action of the water pump; a control valve, the control valve is arranged between the refrigerant side inlet of the shell and tube heat exchanger and the exhaust port of the compressor, the control valve is used to conduct or cut off the refrigerant from entering the shell and tube heat exchanger; a plurality of one-way valves, a plurality of one-way valves are arranged in the refrigerant circuit, the one-way valve is used to control the one-way transmission of the refrigerant; a controller, the controller is used to control the compressor, the four-way valve, the first three-way valve and the control valve based on the operating mode of the air conditioner to change the flow direction of the refrigerant in the refrigerant circuit.

[0005] According to the trigeneration air-conditioning system of the utility model, the compressor, the four-way valve, the first three-way valve and the control valve are controlled according to the operating mode of the trigeneration air-conditioning system to conduct the heating circuit or the cooling circuit and simultaneously conduct the circuit between the compressor and the shell and tube heat exchanger. Therefore, in the present application, the water pump and the water tank are integrated into one, and the four-way valve, the first three-way valve, the control valve and multiple one-way valves are set. The switching state of the three-way valve or the control valve and the one-way valve is used to change the flow direction of the refrigerant. Therefore, under the premise of only setting a water pump, the heating / cooling and hot water making functions are realized at the same time, and there is no need to add an additional heater, thereby improving the integration of the air-conditioning system and reducing the energy consumption of the air-conditioning system. The structure is simple and easy to implement.

[0006] In some embodiments, the first end of the outdoor heat exchanger is connected to the C port of the four-way valve, the first interface of the economizer is connected to one end of the expansion valve, the first end of the liquid reservoir is connected to the first end of the indoor heat exchanger, the second end of the indoor heat exchanger is connected to the E port of the four-way valve, and the S port of the four-way valve is connected to the gas-liquid separator; multiple one-way valves include: a first one-way valve, one end of the first one-way valve is connected to the second end of the outdoor heat exchanger, the other end of the first one-way valve is connected to the second interface of the economizer, and the first one-way valve is used to transfer the refrigerant to the economizer in one direction; a second one-way valve, one end of the second one-way valve is connected to the other end of the expansion valve, the other end of the second one-way valve is connected to the first end of the liquid reservoir, and the second one-way valve is used to transfer the refrigerant to the liquid reservoir in one direction.

[0007] In some embodiments, the multiple one-way valves also include: a third one-way valve, one end of the third one-way valve is connected to the second end of the liquid reservoir, the other end of the third one-way valve is connected to the other end of the first one-way valve and the second interface of the economizer, the third one-way valve is used to transmit the refrigerant to the economizer in one direction; a fourth one-way valve, one end of the fourth one-way valve is connected to the other end of the expansion valve and one end of the second one-way valve, the other end of the fourth one-way valve is connected to one end of the first one-way valve and the second end of the outdoor heat exchanger, the fourth one-way valve is used to transmit the refrigerant to the outdoor heat exchanger in one direction.

[0008] In some embodiments, the trigeneration air conditioning system further includes a muffler, a first end of the muffler is connected to the other end of the third one-way valve and the other end of the first one-way valve, and a second end of the muffler is connected to the second interface of the economizer.

[0009] In some embodiments, the control valve includes a second three-way valve, a first valve port of the second three-way valve is connected to the exhaust port of the compressor, and a second valve port of the second three-way valve is connected to the refrigerant side inlet of the shell and tube heat exchanger; the multiple one-way valves also include: a fifth one-way valve, one end of the fifth one-way valve is connected to the third valve port of the second three-way valve, and the other end of the fifth one-way valve is connected to the first end of the liquid reservoir, and the fifth one-way valve is used to transmit the refrigerant to the liquid reservoir in one direction.

[0010] In some embodiments, the trigeneration air conditioning system further includes a first temperature sensor, which is used to detect the temperature of a water tank; the controller is further used to control the on or off state of the control valve based on the temperature of the water tank.

[0011] In some embodiments, the trigeneration air conditioning system further includes: a second temperature sensor, which is used to detect the indoor ambient temperature; a heater, which is used to heat the water tank; wherein the controller is also used to control the working state of the heater based on the indoor ambient temperature.

[0012] In some embodiments, the third interface of the economizer is connected to the enthalpy increase port of the compressor, and the trigeneration air-conditioning system further includes: an enthalpy increase valve, a first end of the enthalpy increase valve is connected to the second interface of the economizer, and a second end of the enthalpy increase valve is connected to the fourth interface of the economizer.

[0013] In some embodiments, the multiple one-way valves include a sixth one-way valve, one end of which is connected to the first interface of the economizer and one end of the expansion valve; the trigeneration air-conditioning system also includes a pressure reducer, a first end of which is connected to the other end of the sixth one-way valve, and a second end of which is connected to the second valve port of the first three-way valve and the D port of the four-way valve; wherein the sixth one-way valve is used to transmit the refrigerant to the pressure reducer in one direction.

[0014] In some embodiments, the indoor heat exchanger is a plate heat exchanger.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a connection diagram of a trigeneration air conditioning system according to an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of a refrigerant cycle in which a cooling mode and a hot water making mode are operated simultaneously according to an embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of a refrigerant cycle in which a heating mode and a hot water mode are operated simultaneously according to an embodiment of the utility model;

[0020] Figure 4 is a schematic diagram of a refrigerant circulation in a heating mode according to an embodiment of the utility model;

[0021] Figure 5 is a schematic diagram of a refrigerant cycle in a refrigeration mode according to an embodiment of the utility model;

[0022] Figure 6 is a schematic diagram of a refrigerant circulation in a hot water production mode according to an embodiment of the utility model;

[0023] Figure 7 is a schematic diagram of a controller control process according to an embodiment of the utility model;

[0024] Figure 8 is a schematic diagram of a controller control process according to another embodiment of the utility model;

[0025] Fig. 9 It is a schematic diagram of a controller control process according to another embodiment of the utility model.

[0026] Reference numerals:

[0027] Trigeneration air conditioning system 100;

[0028] Water tank 1; water pump 2; first three-way valve 3; shell and tube heat exchanger 4; control valve 5; one-way valve 6; refrigerant circuit 8; muffler 9; first temperature sensor 10; second temperature sensor 11; heater 12; enthalpy increase valve 13; pressure reducer 14; compressor 15; four-way valve 16; indoor heat exchanger 17; liquid storage tank 18; economizer 19; expansion valve 20; outdoor heat exchanger 21; gas-liquid separator 22; low pressure sensor 24; high pressure sensor 25; second three-way valve 51; first one-way valve 61; second one-way valve 622; third one-way valve 633; ​​fourth one-way valve 644; fifth one-way valve 655; sixth one-way valve 66; water flow switch FS; high pressure switch HP. DETAILED DESCRIPTION

[0029] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0030] In order to solve the above problems, the first embodiment of the utility model provides a trigeneration air-conditioning system. The system can integrate the water pump and the water tank to realize the simultaneous operation of heating / cooling and hot water making functions, thereby reducing the energy consumption of the air-conditioning system. The structure is simple and easy to implement.

[0031] Reference below Figure 1 The trigeneration air conditioning system 100 according to the embodiment of the present utility model is described as follows: Figure 1 As shown, the trigeneration air conditioning system 100 includes: a refrigerant circuit 8, a water tank 1, a water pump 2, a first three-way valve 3, a shell and tube heat exchanger 4, a control valve 5, a one-way valve 6 and a controller.

[0032] Among them, the refrigerant circuit 8 allows the refrigerant to circulate in the compressor 15, the four-way valve 16, the indoor heat exchanger 17, the liquid storage tank 18, the economizer 19, the expansion valve 20, the outdoor heat exchanger 21 and the gas-liquid separator 22. The indoor heat exchanger 17 can be a fin heat exchanger; the water tank 1 has a water inlet and a water outlet; one end of the water pump 2 is connected to the water outlet of the water tank 1; the first valve port of the first three-way valve 3 is connected to the exhaust port of the compressor 15, and the second valve port of the first three-way valve 3 is connected to the D port of the four-way valve 16. The first three-way valve 3 is used to change the flow direction of the refrigerant. The first three-way valve can be replaced by a solenoid valve or other multi-way valves. The multi-way valve can be a multi-directional valve body such as a four-way valve, and there is no restriction on this; the refrigerant side inlet of the shell and tube heat exchanger 4 is connected to the exhaust port of the compressor 15, and the refrigerant side outlet of the shell and tube heat exchanger 4 is connected to the third valve port of the first three-way valve 3. The water side inlet of the shell and tube heat exchanger 4 is connected to the other end of the water pump 2, and the water side outlet of the shell and tube heat exchanger 4 is connected to the water inlet of the water tank 1. The shell and tube heat exchanger 4 is a component for heat exchange between refrigerant and water. The shell and tube heat exchanger 4 is used to exchange heat between the water in the water tank 1 and the refrigerant under the action of the water pump 2, that is, the shell and tube heat exchanger 4 is used to produce hot water or cold water through heat exchange, and the water pump is used to transfer the heat generated by the shell and tube heat exchanger to the water in the water tank through circulation; the control valve 5 is arranged between the refrigerant side inlet of the shell and tube heat exchanger 4 and the exhaust port of the compressor 15, and the control valve 5 is used to conduct or cut off the refrigerant from entering the shell and tube heat exchanger 4; multiple one-way valves 6, multiple one-way valves 6 are arranged in the refrigerant circuit 8, and the one-way valve 6 is used to control the one-way transmission of the refrigerant. The control valve can be a multi-way valve or a solenoid valve, and the multi-way valve can be a multi-way valve body such as a four-way valve and a three-way valve, which is not limited. In addition, the trigeneration air conditioning system 100 refers to a system that integrates cooling, heating and hot water supply. The trigeneration air conditioning system 100 realizes multiple functions through one host, and has the advantages of saving space, reducing noise, and facilitating management.

[0033] The controller is used to control the compressor 15, the four-way valve 16, the first three-way valve 3 and the control valve 5 based on the operation mode of the trigeneration air conditioning system 100 to change the flow direction of the refrigerant in the refrigerant circuit 8. The operation mode may be an operation mode in which the cooling mode and the hot water making mode are performed simultaneously; or the operation mode may be an operation mode in which the heating mode and the hot water making mode are performed simultaneously, or the operation mode may be a heating mode, a hot water making mode or a cooling mode, and there is no limitation on this.

[0034] Specifically, the existing trigeneration air-conditioning system cannot realize the functions of cooling or heating and hot water making at the same time. In order to solve this problem, in the present application, the water pump 2 is integrated with the water tank 1, that is, the water pump 2 is connected to the water outlet of the water tank 1, so as to realize the simultaneous operation of the heating / cooling and hot water making functions, reduce the energy consumption of the air-conditioning system, and improve the integration of the air-conditioning system. The structure is simple and easy to implement. That is to say, when the user has the demand for cooling and hot water making at the same time, the trigeneration air-conditioning system runs in the cooling mode and the hot water making mode at the same time, and the controller controls the operation mode according to the operation mode of the trigeneration air-conditioning system. The compressor 15, the four-way valve 16, the first three-way valve 3 and the control valve 5 are used to change the flow direction of the refrigerant in the refrigerant circuit 8, and under the one-way conduction of multiple one-way valves 6, the refrigeration circuit is conducted and the circuit between the compressor 15 and the shell and tube heat exchanger 4 is conducted, that is, the D port and the C port of the four-way valve 16 are controlled to be connected, and the switch state of each valve port of the first three-way valve 3 is controlled to change the flow direction of the refrigerant, and the control valve 5 is conducted so that the refrigerant flowing out of the compressor 15 enters the shell and tube heat exchanger 4, and the shell and tube heat exchanger 4 exchanges heat with the water in the water tank 1 and the refrigerant under the action of the water pump 2 to produce heat Water, at the same time, the high-temperature gaseous refrigerant flowing out of the compressor 15 flows through the shell and tube heat exchanger 4 and circulates in the refrigeration circuit, thereby controlling the trigeneration air-conditioning system to simultaneously realize the cooling and hot water making functions; or when the user has heating and hot water making needs at the same time, the trigeneration air-conditioning system operates in the heating mode and the hot water making mode at the same time. The controller then controls the compressor 15, the four-way valve 16, the first three-way valve 3 and the control valve 5 according to the operating mode of the trigeneration air-conditioning system to change the flow direction of the refrigerant in the refrigerant circuit 8, and under the unidirectional conduction of multiple one-way valves 6, the heating mode is turned on. The circuit simultaneously conducts the circuit between the compressor 15 and the shell and tube heat exchanger 4, that is, the D port and the E port of the four-way valve 16 are controlled to be connected, and the switch state of each valve port of the first three-way valve 3 is controlled to change the flow direction of the refrigerant, and the control valve 5 is connected, so that the refrigerant flowing out of the compressor 15 enters the shell and tube heat exchanger 4. Under the action of the water pump 2, the shell and tube heat exchanger 4 exchanges heat with the water in the water tank 1 and the refrigerant to produce hot water. At the same time, the high-temperature gaseous refrigerant flowing out of the compressor 15 flows through the shell and tube heat exchanger 4 and circulates in the heating circuit, thereby controlling the trigeneration air-conditioning system to simultaneously realize the heating and hot water making functions.Based on this, in the present application, the water pump 2 is integrated with the water tank 1, and a four-way valve 16, a first three-way valve 3, a control valve 5 and multiple one-way valves are set. The refrigerant flow direction is changed by the switching state of the three-way valve or the control valve 5 and the one-way valve 6. Therefore, under the premise of only setting the water pump 2, the heating / cooling and hot water making functions are realized at the same time, and there is no need to add an additional heater. The three independent functions of cooling, heating and hot water making are integrated into one unit, thereby improving the integration of the air-conditioning system. In addition, when making hot water, the water in the water tank 1 can be heated by the hot air generated by refrigeration to reduce the energy consumption of the air-conditioning system. The structure is simple and easy to implement.

[0035] According to the trigeneration air-conditioning system 100 of the utility model, the compressor 15, the four-way valve 16, the first three-way valve 3 and the control valve 5 are controlled according to the operating mode of the trigeneration air-conditioning system to conduct the heating circuit or the cooling circuit and simultaneously conduct the circuit between the compressor 15 and the shell and tube heat exchanger 4. Therefore, in the present application, the water pump 2 and the water tank 1 are integrated into one, and the four-way valve 16, the first three-way valve 3, the control valve 5 and a plurality of one-way valves are provided. The refrigerant flow direction is changed by the switching state of the three-way valve or the control valve 5 and the one-way valve 6, so that the heating / cooling and hot water making functions are realized simultaneously under the premise of only providing the water pump 2, and there is no need to add an additional heater 12, thereby improving the integration of the air-conditioning system and reducing the energy consumption of the air-conditioning system. The structure is simple and easy to implement.

[0036] In some embodiments, the first end of the outdoor heat exchanger 21 is connected to the C port of the four-way valve 16, the first interface of the economizer 19 is connected to one end of the expansion valve 20, the first end of the liquid reservoir 18 is connected to the first end of the indoor heat exchanger 17, the second end of the indoor heat exchanger 17 is connected to the E port of the four-way valve 16, and the S port of the four-way valve 16 is connected to the gas-liquid separator 22.

[0037] In some embodiments, Figure 1 As shown, the multiple one-way valves 6 include: a first one-way valve 61 and a second one-way valve 62 .

[0038] Among them, one end of the first one-way valve 61 is connected to the second end of the outdoor heat exchanger 21, and the other end of the first one-way valve 61 is connected to the second interface of the economizer 19, and the first one-way valve 61 is used to transmit the refrigerant to the economizer 19 in one direction; one end of the second one-way valve 62 is connected to the other end of the expansion valve 20, and the other end of the second one-way valve 62 is connected to the first end of the liquid reservoir 18, and the second one-way valve 62 is used to transmit the refrigerant to the liquid reservoir 18 in one direction.

[0039] Specifically, when the user has cooling and hot water needs at the same time, the trigeneration air-conditioning system operates in a cooling mode and a hot water mode at the same time. The controller controls the compressor 15, the four-way valve 16, the first three-way valve 3 and the control valve 5 according to the operation mode of the trigeneration air-conditioning system to change the flow direction of the refrigerant in the refrigerant circuit 8, and under the unidirectional conduction of multiple one-way valves 6, the refrigeration circuit is conducted and the circuit between the compressor 15 and the shell and tube heat exchanger 4 is conducted, such as Figure 2 As shown, the refrigerant is Figure 2 Flow in the direction indicated by the arrow. Figure 2 The bold black solid line and the bold gray solid line are schematic diagrams of the direction of the refrigerant, the bold black solid line is the high temperature side, and the bold gray solid line is the low temperature side, that is, the D port and the C port of the four-way valve 16 are controlled to be connected, and the second valve port b of the first three-way valve 3 and the third valve port c of the first three-way valve 3 are controlled to be connected, and the control valve 5 is turned on. At this time, the refrigerant flowing out of the compressor 15 first enters the shell and tube heat exchanger 4 through the control valve 5 to heat the water in the water tank 1, and the refrigerant flowing out of the shell and tube heat exchanger 4 passes through the first three-way valve 3, the D port and the C port of the four-way valve 16, the outdoor heat exchanger 21, the first one-way valve 61, the economizer 19, the expansion valve 20, the second one-way valve 62, the liquid storage tank 18, the indoor heat exchanger 17, the E port and the S port of the four-way valve 16, and the gas-liquid separator 22 to form a refrigeration circuit, thereby completing the refrigeration cycle to reduce the indoor temperature, and finally flows back to the compressor 15 through the gas-liquid separator 22.

[0040] Based on this, since the control valve 5 is turned on, the refrigerant flowing out of the compressor 15 enters the shell and tube heat exchanger 4. Under the action of the water pump 2, the shell and tube heat exchanger 4 exchanges heat between the water in the water tank 1 and the refrigerant to produce hot water. At the same time, another part of the high-temperature gaseous refrigerant or the high-temperature gaseous refrigerant after heat exchange in the shell and tube heat exchanger 4 flows into the third valve port of the first three-way valve 3 from the refrigerant side outlet of the shell and tube heat exchanger 4, and then flows into the D port of the four-way valve 16 through the second valve port b of the first three-way valve 3. Under the action of the conduction of the D port and the C port of the four-way valve 16, it flows into the outdoor heat exchanger 21 through the C port of the four-way valve 16. The outdoor heat exchanger 21 exchanges heat between the high-temperature gaseous refrigerant and the outdoor environment, that is, the outdoor heat exchanger 21 releases heat from the high-temperature and high-pressure refrigerant to the outdoor environment. The refrigerant after releasing the heat passes through the economic The second interface of the economizer 19 flows into the economizer 19 to cool the refrigerant again and improve the heat exchange effect of the refrigeration system. The refrigerant flowing out of the first interface of the economizer 19 flows into the expansion valve 20 again. After the expansion valve 20 throttles and reduces the pressure of the refrigerant, the low-temperature refrigerant flows into the indoor heat exchanger 17 under the unidirectional conduction of the second one-way valve 62. The low-temperature refrigerant in the indoor heat exchanger 17 exchanges heat with the indoor environment to absorb indoor heat, thereby reducing the indoor temperature. The refrigerant after heat exchange in the indoor heat exchanger 17 flows into the gas-liquid separator 22 through the E port and S port of the four-way valve 16. After the refrigerant is separated into gas and liquid by the gas-liquid separator 22, it flows back to the compressor 15 through the air intake port of the compressor 15. As a result, the trigeneration air-conditioning system simultaneously realizes the functions of cooling and hot water making to meet the user's cooling and hot water needs at the same time.

[0041] In some embodiments, Figure 1 As shown, the plurality of one-way valves 6 further include: a third one-way valve 63 and a fourth one-way valve 64 .

[0042] Among them, one end of the third one-way valve 63 is connected to the second end of the liquid reservoir 18, and the other end of the third one-way valve 63 is connected to the other end of the first one-way valve 61 and the second interface of the economizer 19, and the third one-way valve 63 is used to transmit the refrigerant to the economizer 19 in one direction; one end of the fourth one-way valve 64 is connected to the other end of the expansion valve 20 and one end of the second one-way valve 62, and the other end of the fourth one-way valve 64 is connected to one end of the first one-way valve 61 and the second end of the outdoor heat exchanger 21, and the fourth one-way valve 64 is used to transmit the refrigerant to the outdoor heat exchanger 21 in one direction.

[0043] Specifically, when the user has heating and hot water needs at the same time, the trigeneration air-conditioning system operates in a heating mode and a hot water mode at the same time. The controller controls the compressor 15, the four-way valve 16, the first three-way valve 3 and the control valve 5 according to the operation mode of the trigeneration air-conditioning system to change the flow direction of the refrigerant in the refrigerant circuit 8, and under the unidirectional conduction of multiple one-way valves 6, the heating circuit is conducted and the circuit between the compressor 15 and the shell and tube heat exchanger 4 is conducted. At this time, the refrigerant is Figure 3 Flow in the direction indicated by the arrow, such as Figure 3 The bold black solid line and the bold gray solid line are schematic diagrams of the refrigerant flow, that is, the D port and the E port of the four-way valve 16 are controlled to be connected, and the second valve port b of the first three-way valve 3 and the third valve port c of the first three-way valve 3 are controlled to be connected, and the control valve 5 is turned on. At this time, the refrigerant flowing out of the compressor 15 first enters the shell and tube heat exchanger 4 through the control valve 5 to heat the water in the water tank 1. The refrigerant flowing out of the shell and tube heat exchanger 4 then passes through the first three-way valve 3, the D port and the E port of the four-way valve 16, the indoor heat exchanger 17, the liquid storage tank 18, the third one-way valve 63, the economizer 19, the expansion valve 20, the fourth one-way valve 64, the outdoor heat exchanger 21, the C port and the S port of the four-way valve 16, and the gas-liquid separator 22 to form a heating circuit, thereby completing the heating cycle to increase the indoor temperature, and finally flows back to the compressor 15 through the gas-liquid separator 22.

[0044] Based on this, since the control valve 5 is turned on, the refrigerant flowing out of the compressor 15 enters the shell and tube heat exchanger 4. Under the action of the water pump 2, the shell and tube heat exchanger 4 exchanges heat between the water in the water tank 1 and the refrigerant to produce hot water. At the same time, another part or the high-temperature gaseous refrigerant after heat exchange in the shell and tube heat exchanger 4 flows into the third valve port c of the first three-way valve 3 from the refrigerant side outlet of the shell and tube heat exchanger 4, and then flows into the D port of the four-way valve 16 through the second valve port b of the first three-way valve 3. Under the action of the conduction of the D port and the E port of the four-way valve 16, it flows into the indoor heat exchanger 17 through the E port of the four-way valve 16. The high-temperature gaseous refrigerant in the indoor heat exchanger 17 exchanges heat with the indoor environment to release heat to the indoor environment, thereby increasing the indoor temperature. In addition, the high-temperature gaseous refrigerant in the indoor heat exchanger 17 exchanges heat with the water in the water tank to produce hot water. The refrigerant after heat exchange flowing out of the indoor heat exchanger 17 flows into the liquid storage tank 18 to produce hot water. In the hot mode, too much liquid refrigerant is stored. The refrigerant discharged from the liquid storage tank 18 flows into the economizer 19 through the second interface of the economizer 19 under the action of the one-way conduction of the third one-way valve 63 to cool the refrigerant. The refrigerant flowing out of the first interface of the economizer 19 flows into the expansion valve 20 again. After the expansion valve 20 throttles and reduces the pressure of the refrigerant, it flows into the outdoor heat exchanger 21 under the action of the one-way conduction of the fourth one-way valve 64. The outdoor heat exchanger 21 exchanges heat between the low-temperature refrigerant and the outdoor environment, that is, the heat of the low-temperature refrigerant absorbs the heat of the outdoor environment. The refrigerant after absorbing the heat flows into the gas-liquid separator 22 under the action of the conduction of the C port of the four-way valve 16 and the S port of the four-way valve 16. After the gas and liquid of the refrigerant are separated by the gas-liquid separator 22, it flows back to the compressor 15 through the air intake port of the compressor 15. As a result, the trigeneration air-conditioning system simultaneously realizes the functions of heating and hot water heating to meet the user's heating and hot water heating needs at the same time.

[0045] In some embodiments, Figure 1 As shown, the trigeneration air conditioning system 100 further includes a silencer 9 .

[0046] The first end of the muffler 9 is connected to the other end of the third one-way valve 63 and the other end of the first one-way valve 61, and the second end of the muffler 9 is connected to the second interface of the economizer 19. The muffler 9 is used to reduce the noise generated by the flow of the refrigerant.

[0047] In some embodiments, Figure 1 As shown, the control valve 5 includes a second three-way valve 51 , and the plurality of one-way valves 6 further include: a fifth one-way valve 65 .

[0048] Among them, the first valve port of the second three-way valve 51 is connected to the exhaust port of the compressor 15, and the second valve port of the second three-way valve 51 is connected to the refrigerant side inlet of the shell and tube heat exchanger 4; one end of the fifth one-way valve 65 is connected to the third valve port of the second three-way valve 51, and the other end of the fifth one-way valve 65 is connected to the first end of the liquid reservoir 18, and the fifth one-way valve 65 is used to unidirectionally transmit the refrigerant to the liquid reservoir 18. The second three-way valve can be replaced by a solenoid valve or other multi-way valve, and the multi-way valve can be a multi-way valve body such as a four-way valve, which is not limited.

[0049] In the embodiment, the controller controls the operation mode of the trigeneration air-conditioning system to operate in a cooling mode and a hot water making mode at the same time through the following contents. That is to say, when the user has cooling demand and hot water making demand at the same time, the control command for cooling and hot water making can be sent to the air-conditioning system through the remote control, the air-conditioning application in the mobile terminal or the control panel on the air-conditioning body by language, gestures and other operation methods. After the trigeneration air-conditioning system receives the control command for cooling and hot water making at the same time, the operation mode of the trigeneration air-conditioning system is controlled to be an operation mode in which the cooling mode and the hot water making mode are carried out simultaneously. The controller controls the compressor 15, the four-way valve 16, the first three-way valve 3 and the control valve 5 to change the flow direction of the refrigerant in the refrigerant circuit 8, that is, controls the D port of the four-way valve 16 to be connected with the C port of the four-way valve 16, controls the second valve port b of the first three-way valve 3 to be connected with the third valve port c of the first three-way valve 3, and controls the first valve port a of the second three-way valve 51 and the second valve port b of the second three-way valve 51 to be connected, that is, controls the refrigerant to flow in a direction of Figure 2 Flow in the direction indicated by the arrow.

[0050] Based on this, since the first valve port a of the second three-way valve 51 and the second valve port b of the second three-way valve 51 are connected to allow the refrigerant to enter the shell and tube heat exchanger 4, at this time, the high-temperature gaseous refrigerant discharged from the exhaust port of the compressor 15 flows into the shell and tube heat exchanger 4 through the second three-way valve 51. Under the action of the water pump 2, the shell and tube heat exchanger 4 exchanges heat between a part of the high-temperature gaseous refrigerant and the water in the water tank 1 to produce hot water. At the same time, another part of the high-temperature gaseous refrigerant or the high-temperature gas after heat exchange in the shell and tube heat exchanger 4 The gaseous refrigerant flows from the refrigerant side outlet of the shell-and-tube heat exchanger 4 into the third valve port of the first three-way valve 3, and then flows into the D port of the four-way valve 16 through the second valve port of the first three-way valve 3. Under the conduction effect of the D port and the C port of the four-way valve 16, it flows into the outdoor heat exchanger 21 through the C port of the four-way valve 16. The outdoor heat exchanger 21 exchanges heat between the high-temperature gaseous refrigerant and the outdoor environment, that is, the outdoor heat exchanger 21 releases heat from the high-temperature and high-pressure refrigerant to the outdoor environment. The refrigerant after releasing heat is discharged into the first one-way valve 61. The refrigerant flows into the muffler 9 through the first one-way valve 61 under the one-way conduction of the four-way valve 16 to reduce the noise generated by the flow of the refrigerant. The refrigerant flowing out of the muffler 9 flows into the economizer 19 through the second interface of the economizer 19 to cool the refrigerant again and improve the heat exchange effect of the refrigeration system. The refrigerant flowing out of the first interface of the economizer 19 flows into the expansion valve 20 again. After the expansion valve 20 throttles and reduces the pressure of the refrigerant, the low-temperature refrigerant flows into the indoor heat exchanger 17 under the one-way conduction of the second one-way valve 62. The low-temperature refrigerant in the indoor heat exchanger 17 exchanges heat with the indoor environment to absorb indoor heat, thereby reducing the indoor temperature. The refrigerant after heat exchange in the indoor heat exchanger 17 flows into the gas-liquid separator 22 through the E port and the S port of the four-way valve 16. After the gas and liquid of the refrigerant are separated by the gas-liquid separator 22, it flows back to the compressor 15 through the air intake port of the compressor 15. As a result, the trigeneration air-conditioning system simultaneously realizes the functions of cooling and hot water making to meet the user's cooling and hot water needs at the same time. In this mode, all the heat generated by refrigeration is used to make hot water, while also providing cooling to the user's room.

[0051] In the embodiment, the controller controls the operation mode of the trigeneration air-conditioning system in which the heating mode and the hot water mode are performed simultaneously through the following contents. That is to say, when the user has heating demand and hot water demand at the same time, the control command for heating and hot water can be sent to the air-conditioning system through the remote control, the air-conditioning application in the mobile terminal or the control panel on the air-conditioning body by language, gestures and other operation methods. After the trigeneration air-conditioning system receives the control command for heating and hot water, the operation mode of the trigeneration air-conditioning system is controlled to be the operation mode in which the heating mode and the hot water mode are performed simultaneously. The controller controls the compressor 15, the four-way valve 16, the first three-way valve 3 and the control valve 5 to change the flow direction of the refrigerant in the refrigerant circuit 8, that is, controls the D port of the four-way valve 16 to be connected with the E port of the four-way valve 16, controls the second valve port b of the first three-way valve 3 to be connected with the third valve port c of the first three-way valve 3, and controls the first valve port a of the second three-way valve 51 and the second valve port b of the second three-way valve 51 to be connected, so as to control the refrigerant to flow in accordance with Figure 3 Flow in the direction indicated by the arrow.

[0052] Based on this, since the second valve port b of the second three-way valve 51 and the first valve port a of the second three-way valve 51 are connected to allow the refrigerant to enter the shell and tube heat exchanger 4, at this time, the high-temperature gaseous refrigerant discharged from the exhaust port of the compressor 15 flows into the shell and tube heat exchanger 4 through the second three-way valve 51. Under the action of the water pump 2, the shell and tube heat exchanger 4 exchanges heat between a part of the high-temperature gaseous refrigerant and the water in the water tank 1 to produce hot water. At the same time, another part of the high-temperature gaseous refrigerant or the high-temperature gaseous refrigerant after heat exchange in the shell and tube heat exchanger 4 is discharged from the cold outlet of the shell and tube heat exchanger 4. The outlet of the medium side flows into the third valve port of the first three-way valve 3, and then flows into the D port of the four-way valve 16 through the second valve port of the first three-way valve 3. Under the conduction effect of the D port and the E port of the four-way valve 16, it flows into the indoor heat exchanger 17 through the E port of the four-way valve 16. The high-temperature gaseous refrigerant in the indoor heat exchanger 17 exchanges heat with the indoor environment to release heat to the indoor environment, thereby increasing the indoor temperature. In addition, the high-temperature gaseous refrigerant in the indoor heat exchanger 17 exchanges heat with the water in the water tank to produce hot water. The hot water flowing out of the indoor heat exchanger 17 The exchanged refrigerant flows into the liquid storage tank 18 to store excess liquid refrigerant in the heating mode. The refrigerant discharged from the liquid storage tank 18 flows into the muffler 9 under the one-way conduction of the third one-way valve 63 to reduce the noise generated by the flow of the refrigerant. The refrigerant flowing out of the muffler 9 flows into the economizer 19 through the second interface of the economizer 19 to cool the refrigerant. The refrigerant flowing out of the first interface of the economizer 19 flows into the expansion valve 20. After the expansion valve 20 throttles and reduces the pressure of the refrigerant, it flows into the expansion valve 20 under the one-way conduction of the fourth one-way valve 64. The refrigerant enters the outdoor heat exchanger 21, and the outdoor heat exchanger 21 exchanges heat between the low-temperature refrigerant and the outdoor environment, that is, the heat of the low-temperature refrigerant absorbs the heat of the outdoor environment. The refrigerant after absorbing the heat flows into the gas-liquid separator 22 under the action of the connection between the C port of the four-way valve 16 and the S port of the four-way valve 16. After the refrigerant is separated into gas and liquid by the gas-liquid separator 22, it flows back to the compressor 15 through the air intake port of the compressor 15. Therefore, the trigeneration air-conditioning system realizes the functions of heating and hot water heating at the same time, so as to meet the heating and hot water heating needs of users at the same time.

[0053] In addition, it should be noted that in the operation mode of simultaneous heating and hot water production, the heat generated by the compressor 15 is first used for hot water production, and the remaining heat is used to heat the user's room.

[0054] In the embodiment, the controller controls the trigeneration air-conditioning system to operate in a heating mode through the following contents. Specifically, when the user has a heating demand, the user can send a heating control instruction to the air-conditioning system through a remote control, an air-conditioning application in a mobile terminal, or a control panel on the air-conditioning body through language, gestures, and other operating methods. After the trigeneration air-conditioning system receives the heating control instruction, the operation mode of the trigeneration air-conditioning system is controlled to be the heating mode. The controller controls the compressor 15, the four-way valve 16, the first three-way valve 3, and the control valve 5 to change the flow direction of the refrigerant in the refrigerant circuit 8, that is, controls the D port of the four-way valve 16 to be connected with the E port of the four-way valve 16, controls the first valve port a of the first three-way valve 3 and the second valve port b of the first three-way valve 3 to be connected, and controls the first valve port a of the second three-way valve 51 and the second valve port b of the second three-way valve 51 to be cut off, so as to control the refrigerant to flow in accordance with Figure 4 The air in the air flows in the direction indicated by the middle arrow. Since the first valve port a of the first three-way valve 3 and the second valve port b of the first three-way valve 3 are connected, the high-temperature gaseous refrigerant discharged from the exhaust port of the compressor 15 flows into the D port of the four-way valve 16 through the first valve port a and the second valve port b of the first three-way valve 3. Under the connection effect of the D port and the E port of the four-way valve 16, it flows into the indoor heat exchanger 17 through the E port of the four-way valve 16. The high-temperature gaseous refrigerant in the indoor heat exchanger 17 exchanges heat with the indoor environment to release heat to the indoor environment, thereby increasing the indoor temperature. The high-temperature gaseous refrigerant in the indoor heat exchanger 17 exchanges heat with the water in the water tank to produce hot water. The refrigerant after heat exchange flowing out of the indoor heat exchanger 17 flows into the liquid reservoir 18 to store excess liquid refrigerant in the heating mode. The refrigerant discharged from the liquid reservoir 18 is unidirectionally connected to the third one-way valve 63. The refrigerant flows into the silencer 9 to reduce the noise generated by the flow of the refrigerant. The refrigerant flowing out of the silencer 9 flows into the economizer 19 through the second interface of the economizer 19 to cool the refrigerant. The refrigerant flowing out of the first interface of the economizer 19 flows into the expansion valve 20. After the expansion valve 20 throttles and reduces the pressure of the refrigerant, it flows into the outdoor heat exchanger 21 under the action of the one-way conduction of the fourth one-way valve 64. The outdoor heat exchanger 21 exchanges heat between the low-temperature refrigerant and the outdoor environment, that is, the heat of the low-temperature refrigerant absorbs the heat of the outdoor environment. After absorbing the heat, the refrigerant flows into the gas-liquid separator 22 under the action of the conduction of the C port of the four-way valve 16 and the S port of the four-way valve 16. After the refrigerant is separated into gas and liquid by the gas-liquid separator 22, it flows back to the compressor 15 through the air intake port of the compressor 15. Thus, the trigeneration air-conditioning system realizes the heating function to meet the heating needs of users.

[0055] In the embodiment, the controller controls the cooling mode of the trigeneration air-conditioning system through the following contents. Specifically, when the user has a cooling demand, the user can send a cooling control instruction to the air-conditioning system through a remote control, an air-conditioning application in a mobile terminal, or a control panel on the air-conditioning body through language, gestures, and other operating methods. After the trigeneration air-conditioning system receives the cooling control instruction, it controls the operating mode of the trigeneration air-conditioning system to the cooling mode. The controller controls the compressor 15, the four-way valve 16, the first three-way valve 3, and the control valve 5 to change the flow direction of the refrigerant in the refrigerant circuit 8, that is, controls the D port of the four-way valve 16 to be connected with the C port of the four-way valve 16, controls the first valve port of the first three-way valve 3 and the second valve port of the first three-way valve 3 to be connected, and controls the first valve port of the second three-way valve 51 and the second valve port of the second three-way valve 51 to be cut off, so as to control the refrigerant to flow in accordance with Figure 5 The high-temperature gaseous refrigerant flows in the direction indicated by the middle arrow. Since the first valve port of the first three-way valve 3 and the second valve port of the first three-way valve 3 are connected, the high-temperature gaseous refrigerant discharged from the exhaust port of the compressor 15 flows into the D port of the four-way valve 16 through the first valve port and the second valve port of the first three-way valve 3. Under the connection effect of the D port and the C port of the four-way valve 16, it flows into the outdoor heat exchanger 21 through the C port of the four-way valve 16. The outdoor heat exchanger 21 exchanges heat between the high-temperature gaseous refrigerant and the outdoor environment, that is, the outdoor heat exchanger 21 releases heat from the high-temperature and high-pressure refrigerant to the outdoor environment. The refrigerant after releasing the heat flows into the muffler 9 through the first one-way valve 61 under the one-way connection of the first one-way valve 61 to reduce the noise generated by the flow of the refrigerant. The refrigerant flowing out of the muffler 9 flows into the economizer 19 through the second interface of the economizer 19 to reheat the refrigerant. The temperature is lowered for the second time to improve the heat exchange effect of the refrigeration system. The refrigerant flowing out of the first interface of the economizer 19 flows into the expansion valve 20 again. After the expansion valve 20 throttles and reduces the pressure of the refrigerant, it flows into the indoor heat exchanger 17 under the unidirectional conduction of the second one-way valve 62. The low-temperature refrigerant in the indoor heat exchanger 17 exchanges heat with the indoor environment to absorb indoor heat, thereby reducing the indoor temperature. The low-temperature refrigerant in the indoor heat exchanger 17 exchanges heat with the water in the water tank to produce cold water. The low-temperature refrigerant after heat exchange in the indoor heat exchanger 17 flows into the gas-liquid separator 22 through the E port and the S port of the four-way valve 16. After the gas and liquid are separated by the gas-liquid separator 22, the refrigerant flows back to the compressor 15 through the air intake port of the compressor 15. Thus, the trigeneration air conditioning system realizes the refrigeration function to meet the user's refrigeration needs. In this mode, all the heat generated by refrigeration is discharged to the outdoor environment, and the cold water generated by the indoor heat exchanger 17 is used to cool the user's room.

[0056] In the embodiment, the controller controls the trigeneration air-conditioning system to operate in the hot water making mode through the following contents. Specifically, when the user has a hot water making demand, the user can send a hot water making control instruction to the air-conditioning system through the remote control, the air-conditioning application in the mobile terminal, or the control panel on the air-conditioning body through language, gestures, and other operation methods. After the trigeneration air-conditioning system receives the hot water making control instruction, the operation mode of the trigeneration air-conditioning system is controlled to be the hot water making mode. The controller controls the compressor 15, the four-way valve 16, the first three-way valve 3, and the control valve 5 to change the flow direction of the refrigerant in the refrigerant circuit 8, that is, controls the S port of the four-way valve 16 to be connected with the C port of the four-way valve 16, controls the first valve port of the first three-way valve 3 to be connected with the third valve port of the first three-way valve 3, and controls the second valve port of the second three-way valve 51 to be connected with the third valve port of the second three-way valve 51, that is, controls the refrigerant to flow in accordance with Figure 6 Flow in the direction indicated by the arrow.

[0057] Based on this, since the first valve port a of the first three-way valve 3 and the third valve port c of the first three-way valve 3 are connected, the high-temperature gaseous refrigerant discharged from the exhaust port of the compressor 15 flows into the shell and tube heat exchanger 4 through the first valve port a and the third valve port c of the first three-way valve 3. Under the action of the water pump 2, the shell and tube heat exchanger 4 exchanges heat with the water in the water tank 1 through a part of the high-temperature gaseous refrigerant to produce hot water. At the same time, another part of the high-temperature gaseous refrigerant or the high-temperature gaseous refrigerant after heat exchange in the shell and tube heat exchanger 4 flows into the second valve port b of the second three-way valve 51 from the refrigerant side outlet of the shell and tube heat exchanger 4, and then flows out through the third valve port c of the second three-way valve 51. The high-temperature gaseous refrigerant is stored in the liquid reservoir 18 under the action of the one-way conduction of the fifth one-way valve 65. The high-temperature gaseous refrigerant discharged from the liquid reservoir 18 flows into the muffler 9 through the third one-way valve 63 under the one-way conduction of the third one-way valve to reduce the refrigerant flow. The noise generated by the movement, the high-temperature gaseous refrigerant flowing out of the silencer 9 flows into the economizer 19 through the second interface of the economizer 19 to cool the high-temperature gas, and the high-temperature gaseous refrigerant flowing out of the first interface of the economizer 19 flows into the expansion valve 20, and the expansion valve 20 throttles the high-temperature gaseous refrigerant into a low-temperature refrigerant. The low-temperature refrigerant flows into the outdoor heat exchanger 21 under the action of the one-way conduction of the fourth one-way valve 64, and the low-temperature refrigerant in the outdoor heat exchanger 21 exchanges heat with the outdoor environment, that is, the heat of the low-temperature refrigerant absorbs the heat of the outdoor environment. The refrigerant after absorbing the heat flows into the gas-liquid separator 22 under the action of the conduction of the C port of the four-way valve 16 and the S port of the four-way valve 16. After the refrigerant is separated into gas and liquid by the gas-liquid separator 22, it flows back to the compressor 15 through the air intake port of the compressor 15. Thus, the trigeneration air-conditioning system realizes the hot water making function to meet the user's hot water making needs.

[0058] In addition, it should be noted that in the hot water making mode, the outdoor heat exchanger 21 utilizes the heat in the outdoor environment, and the heat generated by compression by the compressor 15 is used for hot water making.

[0059] In some embodiments, Figure 1 As shown, the trigeneration air conditioning system 100 further includes a first temperature sensor 10. The first temperature sensor 10 is used to detect the temperature of the water tank 1; the controller is also used to control the on or off of the control valve 5 based on the temperature of the water tank 1.

[0060] Specifically, the first temperature sensor 10 monitors the temperature of the water tank 1 in real time. When the temperature of the water tank 1 is lower than the first temperature threshold, the first preset temperature can be understood as the preset temperature of the water tank 1 that needs to heat the water in the water tank 1. The first preset temperature can be -5°C. The first preset temperature can be customized according to the actual needs of the user or set by default by the air-conditioning system. At this time, it means that the water in the water tank 1 needs to be heated, so the control valve 5 is controlled to be turned on. At this time, the high-temperature gaseous refrigerant discharged from the exhaust port of the compressor 15 flows into the shell and tube heat exchanger 4 through the control valve 5. The shell and tube heat exchanger 4, under the action of the water pump 2, exchanges a part of the high-temperature gaseous refrigerant with the water in the water tank 1 to produce hot water. Conversely, when the temperature of the water tank 1 is higher than the first temperature threshold, it means that the water in the water tank 1 does not need to be heated, so the control valve 5 is controlled to be turned off, that is, the high-temperature gaseous refrigerant discharged from the exhaust port of the compressor 15 is no longer controlled to flow into the shell and tube heat exchanger 4 to produce hot water.

[0061] In some embodiments, Figure 1 As shown, the trigeneration air conditioning system 100 further includes: a second temperature sensor 11 and a heater 12 .

[0062] The second temperature sensor 11 is used to detect the indoor ambient temperature; the heater 12 is used to heat the water tank 1; and the controller is also used to control the working state of the heater 12 based on the indoor ambient temperature. The second temperature sensor 11 can be installed on the indoor heat exchanger 17. For example, it can be installed at the air outlet of the indoor heat exchanger 17.

[0063] Specifically, due to insufficient outdoor heat in a low temperature environment, the air-conditioning system cannot absorb outdoor heat, and thus cannot operate in hot water making and heating modes at the same time. Therefore, the trigeneration air-conditioning system first determines whether the outdoor ambient temperature is greater than the third preset temperature when it is turned on. The third preset temperature can be understood as the outdoor ambient temperature at which the trigeneration air-conditioning system can normally operate in hot water making and heating modes at the same time. The third preset temperature can be 5°C. If the outdoor ambient temperature is greater than the third preset temperature, the trigeneration air-conditioning system can operate in hot water making and heating modes at the same time. At this time, there is no need to heat the water tank 1 through the heater 12, and the working state of the heater 12 is controlled to stop working. On the contrary, if the outdoor ambient temperature is lower than the third preset temperature, the trigeneration air-conditioning system cannot operate in heating and hot water making modes at the same time. At this time, the water tank 1 needs to be heated by the heater 12, and the working state of the heater 12 is controlled to work normally. Therefore, when the indoor ambient temperature is low, controlling the heater 12 to heat the water in the water tank 1 can effectively ensure that hot water making and heating are carried out simultaneously.

[0064] In some embodiments, the third interface of the economizer 19 is connected to the enthalpy increase port of the compressor 15, such as Figure 1 As shown, the trigeneration air conditioning system 100 further includes: an enthalpy increasing valve 13 . The first end of the enthalpy increasing valve 13 is connected to the second interface of the economizer 19 , and the second end of the enthalpy increasing valve 13 is connected to the fourth interface of the economizer 19 .

[0065] Specifically, in the cooling mode, part of the refrigerant after condensation by the outdoor heat exchanger 21 flows into the economizer 19 to cool the refrigerant again, thereby improving the heat exchange effect of the refrigeration system; part of the refrigerant passes through the enthalpy increase valve 13 for throttling and pressure reduction to reduce the refrigerant temperature, and then enters the economizer 19 through the fourth interface of the economizer 19, and then exchanges heat with the refrigerant inside the economizer 19 to further reduce the refrigerant temperature, and then flows into the compressor 15 from the third interface and the enthalpy increase port of the economizer 19, thereby increasing the degree of supercooling and achieving the effect of improving the refrigeration capacity. In the heating mode, part of the refrigerant after condensation by the indoor heat exchanger 17 enters the economizer 19 to be further cooled, and part of it passes through the enthalpy increase valve 13 to throttle and reduce the pressure to reduce the refrigerant temperature, and then enters the economizer 19 through the fourth interface of the economizer 19, and then exchanges heat with the refrigerant inside the economizer 19 to further reduce the refrigerant temperature, and then flows into the enthalpy increase port of the compressor 15 from the third interface of the economizer 19, and continues to be compressed by the compressor 15 to circulate in the heating circuit. Therefore, the low-temperature refrigerant sucked in through the enthalpy increase port can increase the refrigerant mass circulation volume of the compressor 15 at the same speed, thereby improving the heating effect.

[0066] In some embodiments, Figure 1 As shown, the plurality of one-way valves 6 include a sixth one-way valve 6 , and the trigeneration air conditioning system 100 further includes a pressure reducer 14 .

[0067] Among them, one end of the sixth one-way valve 6 is connected to the first interface of the economizer 19 and one end of the expansion valve 20; the first end of the pressure reducer 14 is connected to the other end of the sixth one-way valve 6, and the second end of the pressure reducer 14 is connected to the second valve port of the first three-way valve 3 and the D port of the four-way valve 16; wherein the sixth one-way valve 6 is used to transmit the refrigerant to the pressure reducer 14 in one direction. Specifically, when the trigeneration air-conditioning system operates in the hot water making mode, the high-pressure refrigerant flowing out of the economizer 19 flows through the sixth one-way valve 6 and the pressure reducer 14 to the exhaust pipe of the compressor 15, so as to increase the pressure for the reversal of the four-way valve 16, and at the same time balance the pressure between the four-way valve 16, the indoor heat exchanger 17 and the liquid storage tank 18 inside the air-conditioning system.

[0068] In some embodiments, the indoor heat exchanger 17 is a plate heat exchanger, which is a component for exchanging heat between a refrigerant and water. The plate heat exchanger has the advantages of high heat transfer efficiency, compact structure, good flexibility and easy maintenance.

[0069] In an embodiment, Figure 1 As shown, the trigeneration air conditioning system 100 includes a water flow switch FS, a high pressure switch HP, a low pressure sensor 24, a high pressure sensor 25 and a maintenance port.

[0070] In an embodiment, the control valve group consisting of the control valve, the first three-way valve, the second three-way valve and the one-way valve in the present application can be replaced by multiple electronic expansion valves or four-way valves at a higher cost or a more complex control valve group.

[0071] In the embodiment, the air intake of the compressor is connected to the outlet of the gas-liquid separator through a copper tube, the air exhaust of the compressor is connected to the first valve ports of the first three-way valve and the second three-way valve through a copper tube, and the refrigerant side inlet is connected to the outlet of the three-way valve 2 through a copper tube; the refrigerant side outlet of the shell and tube heat exchanger is connected to the third valve port of the first three-way valve through a copper tube, and the D port of the four-way valve is connected to the second valve port of the first three-way valve through a copper tube; the E port is connected to the refrigerant side air pipe of the indoor heat exchanger through a copper tube; the S port is connected to the inlet of the gas-liquid separator through a copper tube; the C port is connected to the air inlet of the indoor heat exchanger through a copper tube; the first one-way valve position Between the second three-way valve outlet and the liquid reservoir inlet, it is connected to the liquid reservoir through a copper tube. The second one-way valve is located on the copper tube connecting the liquid reservoir inlet and the indoor heat exchanger liquid pipe and the copper tube connecting the expansion valve and the fourth one-way valve inlet, leading to the liquid reservoir. The third one-way valve is located on the copper tube connecting the liquid reservoir outlet and the first one-way valve outlet. The fourth one-way valve is located on the copper tube between the third one-way valve outlet and the liquid refrigerant outlet of the outdoor heat exchanger. The fifth one-way valve is connected to the liquid reservoir through a copper tube. The sixth one-way valve is located on the copper tube connecting the D port of the four-way valve and the inlet of the expansion valve, leading to the D port.

[0072] Reference below Figure 7The control process of the controller of the embodiment of the utility model is described by way of example, and the specific contents are as follows.

[0073] Step S1, start.

[0074] Step S2: The user inputs an operation mode to the trigeneration air conditioning system.

[0075] Step S3: the operation mode is cooling mode.

[0076] Step S4, determining whether the water tank temperature is lower than a first preset temperature, if yes, proceed to step S5, otherwise proceed to step S7.

[0077] Step S5, controls the refrigerant flowing out of the compressor to first enter the shell and tube heat exchanger to heat the water in the water tank, and the refrigerant flowing out of the shell and tube heat exchanger then passes through the first three-way valve, the D port and the C port of the four-way valve, the outdoor heat exchanger, the first one-way valve, the muffler, the economizer, the expansion valve, the second one-way valve, the liquid reservoir, the indoor heat exchanger, the E port and the S port of the four-way valve, and the gas-liquid separator to form a refrigeration circuit, thereby completing the refrigeration cycle to reduce the indoor temperature, and finally flows back to the compressor through the gas-liquid separator.

[0078] Step S6, determining whether the water tank temperature reaches the first preset temperature, if yes, proceed to step S7, otherwise proceed to step S5.

[0079] Step S7, controls the refrigerant flowing out of the compressor not to enter the shell and tube heat exchanger, that is, does not heat the water in the water tank, but directly flows into the refrigeration circuit composed of the first three-way valve, the D port and the C port of the four-way valve, the outdoor heat exchanger, the first one-way valve, the muffler, the economizer, the expansion valve, the second one-way valve, the liquid reservoir, the indoor heat exchanger, the E port and the S port of the four-way valve, and the gas-liquid separator, thereby completing the refrigeration cycle to reduce the indoor temperature, and finally flows back to the compressor through the gas-liquid separator.

[0080] Step S8, determining whether the indoor temperature reaches the second preset temperature, if yes, proceed to step S9, otherwise proceed to step S7.

[0081] Step S9, determining whether the water tank temperature is lower than a first preset temperature, if yes, executing step S10, otherwise executing step S11.

[0082] Step S10, control the refrigerant flowing out of the compressor to first enter the shell and tube heat exchanger to heat the water in the water tank, and the refrigerant flowing out of the shell and tube heat exchanger then passes through the first three-way valve, the D port and C port of the four-way valve, the outdoor heat exchanger, the first one-way valve, the muffler, the economizer, the expansion valve, the second one-way valve, the indoor heat exchanger, the liquid storage tank, the E port and S port of the four-way valve, and the gas-liquid separator to form a refrigeration circuit, thereby completing the refrigeration cycle to reduce the indoor temperature, and finally flows back to the compressor through the gas-liquid separator.

[0083] Step S11, controlling the trigeneration air conditioning system to shut down.

[0084] Specifically, the trigeneration air-conditioning system takes the hot water making mode as the main demand in the cooling mode, that is, when the trigeneration air-conditioning system is turned on, it first determines whether the temperature of the water tank 1 is lower than the first preset temperature, wherein the first preset temperature can be understood as the preset temperature of the water tank 1 that needs to heat the water in the water tank 1, and the first preset temperature can be -5°C. The first preset temperature can be customized according to the actual needs of the user or set by the air-conditioning system by default. If it is lower than the first preset temperature, the refrigerant flowing out of the compressor 15 is controlled to enter the shell and tube heat exchanger 4 first, and the shell and tube heat exchanger 4 exchanges heat between the water in the water tank 1 and the refrigerant under the action of the water pump 2 to heat the water in the water tank 1 so that the temperature of the water tank 1 reaches the first preset temperature, and then the trigeneration air-conditioning system is controlled to The system operates in cooling mode; if the temperature of water tank 1 is higher than the first preset temperature, there is no need to heat the water in water tank 1, and the refrigerant flowing out of compressor 15 is controlled not to enter the shell and tube heat exchanger 4, but to flow directly into the refrigeration circuit to operate in cooling mode. After the indoor temperature reaches the second preset temperature, it is determined again whether the temperature of water tank 1 is lower than the first preset temperature, wherein the second preset temperature can be understood as the user-set or system-default suitable temperature in cooling mode. If so, the refrigerant flowing out of compressor 15 is controlled to enter the shell and tube heat exchanger 4 first, and the shell and tube heat exchanger 4 exchanges heat between the water in water tank 1 and the refrigerant under the action of water pump 2 to heat the water in water tank 1. If not, that is, the trigeneration air-conditioning system has no demand for hot water and cooling, the trigeneration air-conditioning system is controlled to shut down.

[0085] Reference below Figure 8 The control process of the controller of the embodiment of the utility model is described by way of example, and the specific contents are as follows.

[0086] Step S12, start.

[0087] Step S13: The user inputs an operation mode to the trigeneration air conditioning system.

[0088] Step S14, the operation mode is the heating mode.

[0089] Step S15, determining whether the outdoor ambient temperature is greater than a third preset temperature, if yes, executing step S16, otherwise executing step S19.

[0090] Step S16, determining whether the water tank temperature is lower than a first preset temperature, if yes, executing step S17, otherwise executing step S19.

[0091] Step S17, control the refrigerant flowing out of the compressor to first enter the shell and tube heat exchanger to heat the water in the water tank, and the refrigerant flowing out of the shell and tube heat exchanger then passes through the first three-way valve, the D port and the E port of the four-way valve, the indoor heat exchanger, the liquid storage tank, the third one-way valve, the muffler, the economizer, the expansion valve, the fourth one-way valve, the outdoor heat exchanger, the C port and the S port of the four-way valve, and the gas-liquid separator to form a heating circuit, thereby completing the heating cycle to increase the indoor temperature, and finally flows back to the compressor through the gas-liquid separator.

[0092] Step S18, determining whether the water tank temperature reaches the first preset temperature, if yes, proceed to step S19, otherwise proceed to step S17.

[0093] Step S19, controls the refrigerant flowing out of the compressor not to enter the shell and tube heat exchanger, that is, does not heat the water in the water tank, but directly flows into the heating circuit composed of the first three-way valve, the D port and the E port of the four-way valve, the indoor heat exchanger, the liquid reservoir, the third one-way valve, the muffler, the economizer, the expansion valve, the fourth one-way valve, the outdoor heat exchanger, the C port and the S port of the four-way valve, and the gas-liquid separator, thereby completing the heating cycle to increase the indoor temperature, and finally flows back to the compressor through the gas-liquid separator.

[0094] Step S20, determining whether the indoor temperature reaches a fourth preset temperature, if so, executing step S15, otherwise executing step S19.

[0095] Step S21: If the conditions of step S20 and step S16 are met, the trigeneration air conditioning system is controlled to shut down.

[0096] Specifically, the trigeneration air-conditioning system always takes the hot water making mode as the main demand in the heating mode. That is to say, due to insufficient outdoor heat in a low temperature environment, the air-conditioning system cannot absorb outdoor heat, and thus cannot operate the hot water making and heating modes at the same time. Therefore, the trigeneration air-conditioning system first determines whether the outdoor ambient temperature is greater than the third preset temperature when it is turned on. The third preset temperature can be understood as the outdoor ambient temperature at which the trigeneration air-conditioning system can normally operate the hot water making and heating modes at the same time. The third preset temperature can be 5°C. If the outdoor ambient temperature is greater than the third preset temperature, the trigeneration air-conditioning system can operate the hot water making and heating modes at the same time. If the outdoor ambient temperature is lower than the third preset temperature, the trigeneration air-conditioning system cannot operate the heating and hot water making modes at the same time, and domestic hot water needs to be produced by electric heating in water tank 1. Under the condition that the outdoor ambient temperature is greater than the third preset temperature, it is determined whether the temperature of the water tank 1 is lower than the first preset temperature. If so, the refrigerant is controlled to enter the shell and tube heat exchanger 4 first to produce domestic hot water, and then the refrigerant after producing hot water is used to continue heating. When the temperature of the water tank 1 reaches the first preset temperature, the refrigerant is controlled not to enter the shell and tube heat exchanger 4, but directly flows into the heating circuit to run the heating mode. After running for a period of time, it is determined whether the indoor temperature reaches the fourth preset temperature, wherein the fourth preset temperature can be understood as the user-set or system-default suitable temperature in the heating mode. After the indoor temperature reaches the fourth preset temperature, it is determined again whether the temperature of the water tank 1 is lower than the first preset temperature. If so, the trigeneration air-conditioning system controls the refrigerant flowing out of the compressor 15 to enter the shell and tube heat exchanger 4. Under the action of the water pump 2, the shell and tube heat exchanger 4 exchanges heat between the water in the water tank 1 and the refrigerant to heat the water in the water tank 1. If not, that is, the trigeneration air-conditioning system has no hot water and heating needs, the trigeneration air-conditioning system is controlled to shut down.

[0097] Reference below Fig. 9 The control process of the controller of the embodiment of the utility model is described by way of example, and the specific contents are as follows.

[0098] Step S20, start.

[0099] Step S21, determining whether the outdoor environment temperature is greater than a fifth preset temperature, if yes, executing step S22, otherwise executing step S27.

[0100] Step S22, the operation mode is cooling mode.

[0101] Step S23, determining whether the water tank temperature is lower than a first preset temperature, if yes, proceed to step S24, otherwise proceed to step S26.

[0102] Step S24, controls the refrigerant flowing out of the compressor to first enter the shell and tube heat exchanger to heat the water in the water tank, and the refrigerant flowing out of the shell and tube heat exchanger then passes through the first three-way valve, the D port and C port of the four-way valve, the outdoor heat exchanger, the first one-way valve, the muffler, the economizer, the expansion valve, the second one-way valve, the indoor heat exchanger, the liquid storage tank, the E port and S port of the four-way valve, and the gas-liquid separator to form a refrigeration circuit, thereby completing the refrigeration cycle to reduce the indoor temperature, and finally flows back to the compressor through the gas-liquid separator.

[0103] Step S25, determining whether the water tank temperature reaches the first preset temperature, if yes, executing step S26, otherwise executing step S24.

[0104] Step S26, controlling the trigeneration air conditioning system to shut down.

[0105] Step S27, the operation mode is heating mode.

[0106] Step S28, determining whether the water tank temperature is lower than the first preset temperature, if yes, proceed to step S29, otherwise proceed to step S31.

[0107] Step S29, controls the refrigerant flowing out of the compressor to first enter the shell and tube heat exchanger to heat the water in the water tank, and the refrigerant flowing out of the shell and tube heat exchanger then passes through the first three-way valve, the D port and the E port of the four-way valve, the indoor heat exchanger, the liquid storage tank, the third one-way valve, the muffler, the economizer, the expansion valve, the fourth one-way valve, the outdoor heat exchanger, the C port and the S port of the four-way valve, and the gas-liquid separator to form a heating circuit, thereby completing the heating cycle to increase the indoor temperature, and finally flows back to the compressor through the gas-liquid separator.

[0108] Step S30, determining whether the water tank temperature reaches the first preset temperature, if yes, executing step S31, otherwise executing step S29.

[0109] Step S31, controlling the trigeneration air conditioning system to shut down.

[0110] Specifically, when the user has no cooling and heating needs but has a demand for domestic hot water, the trigeneration air-conditioning system first determines whether the outdoor ambient temperature is greater than the fifth preset temperature, wherein the fifth preset temperature can be understood as the outdoor ambient temperature preset for determining whether the system operates in cooling mode or heating mode. The fifth preset temperature can be 26°C. If the outdoor ambient temperature is greater than the fifth preset temperature, the trigeneration air-conditioning system is controlled to operate in cooling mode, and then determine whether the temperature of the water tank 1 is lower than the first preset temperature. If so, the refrigerant flowing out of the compressor 15 is controlled to enter the shell and tube heat exchanger 4. The shell and tube heat exchanger 4 exchanges heat between the water in the water tank 1 and the refrigerant under the action of the water pump 2 to heat the water in the water tank 1 until the temperature of the water tank 1 reaches the first preset temperature. The refrigeration circuit, i.e., the refrigeration side, is used to store cold energy and provide cooling to the user when the user needs it. If the outdoor ambient temperature is not greater than the fifth preset temperature, the trigeneration air-conditioning system is controlled to operate in heating mode, and then it is determined whether the temperature of the water tank 1 is lower than the first preset temperature. If so, the refrigerant flowing out of the compressor 15 is controlled to enter the shell and tube heat exchanger 4. The shell and tube heat exchanger 4 exchanges heat between the water in the water tank 1 and the refrigerant under the action of the water pump 2 to heat the water in the water tank 1 until the temperature of the water tank 1 reaches the first preset temperature. The heating circuit, i.e., the heating side, is used to store cold energy and provide heat to the user when the user needs it.

[0111] Based on this, in the present application, the water pump 2 is integrated with the water tank 1, and a four-way valve 16, a first three-way valve 3, a control valve 5 and multiple one-way valves are set. The flow direction of the refrigerant is changed by the switch combination of the three-way valve or the control valve 5 and the one-way valve 6. Therefore, under the premise of only setting the water pump 2, the heating / cooling and hot water making functions are realized at the same time, and there is no need to add an additional heater. The three independent functions of cooling, heating and hot water making are integrated into one unit, thereby improving the integration of the air-conditioning system. In addition, when making hot water, the water in the water tank 1 can be heated by the hot air generated by refrigeration to reduce the energy consumption of the air-conditioning system. The structure is simple and easy to implement.

[0112] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0113] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A trigeneration air conditioning system, characterized in that: include: A refrigerant circuit that circulates the refrigerant through the compressor, the four-way valve, the indoor heat exchanger, the liquid receiver, the economizer, the expansion valve, the outdoor heat exchanger, and the gas-liquid separator; A water tank, the water tank having a water inlet and a water outlet; A water pump, one end of which is connected to the water outlet of the water tank; a first three-way valve, wherein a first valve port of the first three-way valve is connected to an exhaust port of the compressor, a second valve port of the first three-way valve is connected to a D port of the four-way valve, and the first three-way valve is used to change a flow direction of the refrigerant; A shell and tube heat exchanger, wherein the refrigerant side inlet of the shell and tube heat exchanger is connected to the exhaust port of the compressor, the refrigerant side outlet of the shell and tube heat exchanger is connected to the third valve port of the first three-way valve, the water side inlet of the shell and tube heat exchanger is connected to the other end of the water pump, and the water side outlet of the shell and tube heat exchanger is connected to the water inlet of the water tank. The shell and tube heat exchanger is used to perform heat exchange between the water in the water tank and the refrigerant under the action of the water pump; A control valve, the control valve being arranged between the refrigerant side inlet of the shell and tube heat exchanger and the exhaust port of the compressor, the control valve being used to conduct or cut off the refrigerant from entering the shell and tube heat exchanger; A plurality of one-way valves, wherein the plurality of one-way valves are arranged in the refrigerant circuit, and the one-way valves are used to control the one-way transmission of the refrigerant; A controller is used to control the compressor, the four-way valve, the first three-way valve and the control valve based on the operation mode of the trigeneration air-conditioning system to change the flow direction of the refrigerant in the refrigerant circuit.

2. The trigeneration air conditioning system according to claim 1, characterized in that: The first end of the outdoor heat exchanger is connected to the C port of the four-way valve, the first interface of the economizer is connected to one end of the expansion valve, the first end of the liquid reservoir is connected to the first end of the indoor heat exchanger, the second end of the indoor heat exchanger is connected to the E port of the four-way valve, and the S port of the four-way valve is connected to the gas-liquid separator; Multiple check valves include: a first one-way valve, one end of which is connected to the second end of the outdoor heat exchanger, the other end of which is connected to the second interface of the economizer, and the first one-way valve is used to transmit the refrigerant to the economizer in a one-way manner; A second one-way valve, one end of the second one-way valve is connected to the other end of the expansion valve, the other end of the second one-way valve is connected to the first end of the liquid reservoir, and the second one-way valve is used to transmit the refrigerant to the liquid reservoir in one direction.

3. The trigeneration air conditioning system according to claim 2, characterized in that: Multiple check valves also include: a third one-way valve, one end of which is connected to the second end of the liquid reservoir, and the other end of which is connected to the other end of the first one-way valve and the second interface of the economizer, and the third one-way valve is used to transmit the refrigerant to the economizer in one direction; A fourth one-way valve, one end of the fourth one-way valve is connected to the other end of the expansion valve and one end of the second one-way valve, the other end of the fourth one-way valve is connected to one end of the first one-way valve and the second end of the outdoor heat exchanger, and the fourth one-way valve is used to transfer the refrigerant to the outdoor heat exchanger in one direction.

4. The trigeneration air conditioning system according to claim 3, characterized in that: The trigeneration air conditioning system further includes a muffler, a first end of the muffler is connected to the other end of the third one-way valve and the other end of the first one-way valve, and a second end of the muffler is connected to the second interface of the economizer.

5. The trigeneration air conditioning system according to any one of claims 2 to 4, characterized in that: The control valve comprises a second three-way valve, a first valve port of the second three-way valve is connected to the exhaust port of the compressor, and a second valve port of the second three-way valve is connected to the refrigerant side inlet of the shell and tube heat exchanger; Multiple check valves also include: A fifth one-way valve, one end of the fifth one-way valve is connected to the third valve port of the second three-way valve, and the other end of the fifth one-way valve is connected to the first end of the liquid reservoir, and the fifth one-way valve is used to transmit the refrigerant to the liquid reservoir in one direction.

6. The trigeneration air conditioning system according to claim 5, characterized in that: The trigeneration air conditioning system further includes a first temperature sensor, which is used to detect the temperature of the water tank; The controller is also used to control the on or off state of the control valve based on the temperature of the water tank.

7. The trigeneration air conditioning system according to claim 6, characterized in that: The trigeneration air conditioning system further comprises: A second temperature sensor, the second temperature sensor is used to detect the indoor environment temperature; A heater, wherein the heater is used to heat the water tank; Wherein, the controller is also used to control the working state of the heater based on the indoor ambient temperature.

8. The trigeneration air conditioning system according to claim 1, characterized in that: The third interface of the economizer is connected to the enthalpy increase port of the compressor, and the trigeneration air conditioning system further includes: An enthalpy increasing valve, wherein a first end of the enthalpy increasing valve is connected to the second interface of the economizer, and a second end of the enthalpy increasing valve is connected to the fourth interface of the economizer.

9. The trigeneration air conditioning system according to claim 1, characterized in that: The plurality of one-way valves include a sixth one-way valve, one end of the sixth one-way valve is connected to the first interface of the economizer and one end of the expansion valve; The trigeneration air conditioning system further includes a pressure reducer, a first end of the pressure reducer is connected to the other end of the sixth one-way valve, and a second end of the pressure reducer is connected to the second valve port of the first three-way valve and the D port of the four-way valve; Wherein, the sixth one-way valve is used to transmit the refrigerant to the pressure reducer in a one-way manner.

10. The trigeneration air conditioning system according to claim 1, characterized in that: The indoor heat exchanger is a plate heat exchanger.

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