Air conditioning system

Abstract

The utility model provides an air conditioning system which comprises an outdoor heat exchanger, a compressor, a first throttling element and a four-way valve. The convection terminal comprises an indoor heat exchanger, and the compressor, the outdoor heat exchanger, the first throttling element and the indoor heat exchanger are communicated to form a first refrigerant circulation loop; the radiation tail end is connected with the compressor, the outdoor heat exchanger and the first throttling element through pipelines to form a second refrigerant circulation loop; the first valve is connected to an exhaust port of the compressor, so that a refrigerant exhausted from the exhaust port flows through the first valve when flowing in the first refrigerant circulation loop and the second refrigerant circulation loop; the water tank of the water heater comprises a heat exchange coil pipe, and the heat exchange coil pipe and the first valve are arranged in parallel. By arranging the first valve and the water heater water tank connected with the first valve in parallel, heat can be recycled to the water heater for reuse during convection tail end refrigeration, and heat is prevented from being directly released outdoors.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioning, and in particular relates to an air conditioning system. Background Art

[0002] With the improvement of people's living standards, traditional air conditioners using convection heat exchange can no longer meet people's needs. More and more air conditioning systems use a combination of radiation heat exchange and convection heat exchange, such as waterless radiation multi-split air conditioners, fluorine-free and fluorine-free multi-split air conditioners, etc. These air conditioning systems include both convection terminals and radiation terminals, where the convection terminals can include duct units, ceiling units, air conditioner indoor units, etc., and the radiation terminals usually include a capillary network located on the ground or wall, and the refrigerant flowing in the capillary network exchanges heat with the indoor air in the form of radiation.

[0003] In the related art, the capillary network is connected in parallel with the convection terminal at the high-pressure refrigerant end. If only the duct unit terminal is turned on for heating and the capillary network is turned off, the refrigerant will continue to condense into liquid inside the capillary network, causing less and less refrigerant to circulate in the system and the effect to deteriorate. On the contrary, when only the capillary network is turned on for heating and the convection terminal is turned off, the refrigerant will continue to condense inside the convection terminal pipeline and deposit inside the convection terminal pipeline, causing a lack of circulating refrigerant.

[0004] In order to solve the problem of continuous reduction in refrigerant circulation caused by refrigerant deposition, the traditional multi-split system adopts a method of opening the expansion valve at the end of the shutdown to a small degree to release the condensed liquid inside back to the compressor. However, this method requires increasing the compressor frequency and increasing the refrigerant circulation volume of the system, resulting in additional consumption of compressor power. Moreover, for the capillary network, this method will cause the capillary to continue to release heat and cannot be completely closed.

[0005] In addition, the existing air-conditioning system cannot be connected to the water heater and the capillary network at the same time, and when the convection end cooling is running, the heat is released to the outdoor side and cannot be recovered to the water heater for reuse.

[0006] In view of this, this application is filed. Utility Model Content

[0007] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end,

[0008] According to an embodiment of the present disclosure, an air conditioning system is provided, comprising:

[0009] An outdoor heat exchanger, used for exchanging heat with outdoor air;

[0010] A compressor is used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas;

[0011] A first throttling element, used for throttling the refrigerant passing therethrough;

[0012] The convection end includes an indoor heat exchanger for convection heat exchange with indoor air, wherein the compressor, the outdoor heat exchanger, the first throttling element and the indoor heat exchanger are connected through pipelines to form a first refrigerant circulation loop;

[0013] A radiation terminal, used for radiating heat transfer with indoor air, wherein the radiation terminal, the compressor, the outdoor heat exchanger and the first throttling element are connected through a pipeline to form a second refrigerant circulation loop;

[0014] A first valve connected to the exhaust port of the compressor, so that the refrigerant discharged from the exhaust port flows through the first valve and flows in the first refrigerant circulation loop and the second refrigerant circulation loop;

[0015] The water tank of the water heater comprises a heat exchange coil, and the heat exchange coil is arranged in parallel with the first valve.

[0016] The air conditioning system provided in this embodiment can be connected to the convection terminal, the radiation terminal and the water heater at the same time, and is flexible to use. By setting the first valve, when the convection terminal is in cooling operation, heat can be recovered to the water heater for reuse, avoiding direct release of heat to the outside.

[0017] According to an embodiment of the present disclosure, an air conditioning system is provided, comprising:

[0018] An outdoor heat exchanger, used for exchanging heat with outdoor air;

[0019] A compressor is used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas;

[0020] A first throttling element, used for throttling the refrigerant passing therethrough;

[0021] The convection end includes an indoor heat exchanger for convection heat exchange with indoor air, wherein the compressor, the outdoor heat exchanger, the first throttling element and the indoor heat exchanger are connected through pipelines to form a first refrigerant circulation loop;

[0022] A radiation terminal, used for radiating heat transfer with indoor air, wherein the radiation terminal, the compressor, the outdoor heat exchanger and the first throttling element are connected through a pipeline to form a second refrigerant circulation loop;

[0023] a first electric ball valve connected to the exhaust port of the compressor so that the refrigerant discharged from the exhaust port flows through the first electric ball valve and flows in the first refrigerant circulation loop and the second refrigerant circulation loop;

[0024] The water tank of the water heater comprises a heat exchange coil, and the heat exchange coil is arranged in parallel with the first electric ball valve.

[0025] The air conditioning system provided in this embodiment can be connected to the convection terminal, the radiation terminal and the water heater at the same time, and is flexible to use. By setting the first electric ball valve, when the convection terminal is in cooling operation, the heat can be recovered to the water heater for reuse, avoiding the heat being released directly to the outside. At the same time, the first electric ball valve can flexibly control the amount of refrigerant entering the heat exchange coil, thereby controlling the heating power, increasing the control flexibility.

[0026] According to an embodiment of the present disclosure, the air conditioning system further includes:

[0027] A four-way valve connected to the first refrigerant circulation loop to switch the refrigerant flow direction;

[0028] A three-way proportional valve connected to the pipeline between the exhaust port of the compressor and the four-way valve;

[0029] The three-way proportional valve comprises an inlet, a first outlet and a second outlet, the inlet is connected to the exhaust port, the first outlet is connected to the four-way valve, and the second outlet is connected to the second end of the radiation end;

[0030] The pipeline between the first throttling element and the first end of the indoor heat exchanger is a trunk line, and the first end of the radiation terminal is connected to the trunk line.

[0031] This technical solution can adjust the refrigerant distribution ratio during heating by setting a three-way proportional valve, flexibly control the opening and closing of the convection terminal and the radiation terminal and the heat distribution ratio, and reduce the refrigerant migration amount when heating with only the convection terminal open or the radiation terminal open.

[0032] According to an embodiment of the present disclosure, the air conditioning system further includes a second electric ball valve, one end of which is connected to the first end of the radiation terminal, and the other end of which is connected to the trunk line. By providing the electric ball valve, when the convection terminal is heating, the refrigerant is prevented from migrating into the radiation terminal, and when used in conjunction with the three-way proportional valve, the refrigerant flow rate can be controlled more accurately.

[0033] According to an embodiment of the present disclosure, the air-conditioning system also includes an oil separator, which is connected in series to the pipeline between the exhaust port and the inlet, and the oil return port of the oil separator is connected to the suction port of the compressor through an oil return capillary to guide the lubricating oil separated from the high-temperature and high-pressure refrigerant discharged from the compressor to the compressor.

[0034] According to an embodiment of the present disclosure, a third stop valve is provided on the main line to control the on-off of the main line.

[0035] According to an embodiment of the present disclosure, an air supply module is provided on the main line, and the air supply module is located between the first throttling element and the third stop valve. The air supply module is connected to the air supply port of the compressor through an air supply pipeline, and can operate with air supply when the compressor needs air supply.

[0036] According to an embodiment of the present disclosure, the gas replenishment module includes:

[0037] an economizer, disposed in the trunk line and connected to the air supply port through the air supply pipeline;

[0038] A bypass pipeline connecting the economizer and the trunk line;

[0039] The auxiliary expansion valve is connected to the bypass pipeline.

[0040] According to an embodiment of the present disclosure, a high-pressure liquid reservoir is provided on the main line, and the high-pressure liquid reservoir is located between the first throttling element and the third stop valve.

[0041] According to an embodiment of the present disclosure, the convection terminal includes a second throttling element, and the first end of the indoor heat exchanger is connected to the main circuit through the second throttling element. By setting the second throttling element, the refrigerant can be throttled twice when the convection terminal is heating. At the same time, when the single-open radiation terminal is heating, the refrigerant in the main circuit is prevented from migrating to the convection terminal.

[0042] According to an embodiment of the present disclosure, a first stop valve is connected to the pipeline between the second outlet and the second end of the radiation terminal, and a second stop valve is connected to the pipeline between the four-way valve and the second end of the indoor heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 is a schematic diagram of an air conditioning system according to an embodiment of the present disclosure;

[0045] Figure 2 is a schematic diagram of an air conditioning system configured with a high-pressure liquid reservoir according to an embodiment of the present disclosure;

[0046] Figure 3 is a schematic diagram of an air conditioning system configured with an air supply module according to an embodiment of the present disclosure;

[0047] Figure 4 yes Figure 3 Schematic diagram of the outdoor unit of the air conditioning system;

[0048] Figure 5 is a schematic diagram of an air conditioning system equipped with an oil separator according to an embodiment of the present disclosure;

[0049] Figure 6 It is a schematic diagram of an air conditioning system configured with an oil separator and an air supply module according to an embodiment of the present disclosure;

[0050] Figure 7 yes Figure 5 Schematic diagram of the outdoor unit of the air conditioning system;

[0051] Figure 8 It is a refrigerant flow path when the air conditioning system operates in the duct cooling mode according to the embodiment of the present disclosure;

[0052] Fig. 9 It is the refrigerant flow path when the air conditioning system operates in the duct cooling + hot water making mode according to the embodiment of the present disclosure;

[0053] Fig.10 It is the refrigerant flow path when the air conditioning system operates in the air-pipe heating mode according to the embodiment of the present disclosure;

[0054] Fig.11 It is the refrigerant flow path when the air conditioning system operates in the air-pipe heating + hot water making mode according to the embodiment of the present disclosure;

[0055] Fig.12 It is the refrigerant flow path when the air-conditioning system operates in the floor heating mode according to the embodiment of the present disclosure;

[0056] Fig.13 It is the refrigerant flow path when the air conditioning system operates in the floor heating + hot water mode according to the embodiment of the present disclosure;

[0057] Fig.14 It is the refrigerant flow path when the air conditioning system operates in the air pipe heating + floor heating + hot water heating mode according to the embodiment of the present disclosure;

[0058] Fig.15 It is the refrigerant flow path when the air conditioning system operates in the air pipe heating + floor heating mode according to the embodiment of the present disclosure;

[0059] Fig.16 This is the flow path of the refrigerant when the compressor of the air-conditioning system is replenished with air according to the embodiment of the present disclosure.

[0060] In the above figures: air conditioning system; outdoor unit 1; compressor 11; outdoor heat exchanger 12; four-way valve 13; first throttling element 14; one-way valve 141; three-way proportional valve 15; oil separator 161; return oil capillary 162; bypass solenoid valve 163; gas-liquid separator 17; high-pressure liquid storage tank 18; air supply module 19; economizer 191; bypass pipeline 192; auxiliary expansion valve 193; air supply pipeline 194; convection terminal 2; indoor heat exchanger 21; second throttling element 22; indoor fan 23; radiation terminal 3; second electric ball valve 4; first stop valve 511; second stop valve 52; third stop valve 53; water heater tank 6; heat exchange coil 61; first valve 7; trunk 8. DETAILED DESCRIPTION

[0061] In order to make the purpose and implementation method of the present application clearer, the exemplary implementation method of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0062] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below. It is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0063] The terms "first", "second", etc. in the specification and claims of this application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0064] The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0065] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] The utility model provides an air conditioning system 100, as shown below Figures 1 to 16An illustrative embodiment of the air conditioning system 100 provided by the present invention is described.

[0067] refer to Figure 1 The air conditioning system 100 may include an outdoor unit 1, which is arranged outdoors and is used to exchange heat with the outdoor environment.

[0068] The air conditioning system 100 may include an indoor unit, which is disposed indoors. The outdoor unit 1 cooperates with the indoor unit to cool or heat the indoor environment.

[0069] Continue to refer Figure 1 The outdoor unit 1 may include an outdoor heat exchanger 12. The outdoor heat exchanger 12 is used to exchange heat with outdoor air, and a refrigerant for exchanging heat with indoor air flows inside the outdoor heat exchanger 12.

[0070] When the air conditioning system 100 performs cooling, the outdoor heat exchanger 12 works as a condenser, which condenses the compressed refrigerant into a liquid phase, and releases heat to the surrounding environment through the condensation process.

[0071] When the air conditioning system 100 performs heating, the outdoor heat exchanger 12 operates as an evaporator. The evaporator evaporates the refrigerant expanded in the throttling device and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor 11.

[0072] The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled.

[0073] In some embodiments, the outdoor unit 1 may include an outdoor fan. The outdoor fan is disposed opposite to the outdoor heat exchanger 12 and the outdoor heat exchanger 12 performs convection heat exchange.

[0074] The outdoor fan is used to provide power for the flow of outdoor air and increase the heat exchange efficiency between the outdoor air and the outdoor heat exchanger 12 .

[0075] In some embodiments, the outdoor unit 1 may include a compressor 11 .

[0076] The compressor 11 is used to compress the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharge it to the condenser. The compressor 11 provides power for the circulation of the refrigerant in the pipeline.

[0077] The compressor 11 may include an exhaust port, and the refrigerant in a low-temperature and low-pressure state is compressed into a refrigerant in a high-temperature and high-pressure state and then output from the compressor 11 through the exhaust port.

[0078] The compressor 11 may include an air intake port, and the refrigerant in a low-temperature and low-pressure state enters the compressor 11 through the air intake port.

[0079] In some embodiments, the outdoor unit 1 may include a first throttling element 14. The first throttling element 14 is used to throttle the refrigerant passing therethrough.

[0080] The first throttle element 14 expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the condenser into a low-pressure liquid-phase refrigerant.

[0081] In some embodiments, the indoor unit may include a convection terminal 2. The convection terminal 2 exchanges heat with the indoor air in the form of convection.

[0082] It should be noted that the convection terminal 2 can have a variety of implementation forms. The convection terminal 2 can be a wall-mounted air-conditioning indoor unit, a vertical air-conditioning indoor unit, a duct unit, a ceiling unit, etc.

[0083] In some embodiments, the convection terminal 2 may include an indoor heat exchanger 21, and the indoor heat exchanger 21 is used to exchange heat with indoor air.

[0084] In some embodiments, reference Figure 1 The convection terminal 2 is set to be multiple, and the multiple convection terminals 2 are arranged in parallel with each other.

[0085] In some embodiments, reference Figure 1 to Figure 3 The convection terminal 2 may include an indoor fan 23 , which is disposed close to the indoor heat exchanger 21 to increase the heat exchange effect between the indoor air and the indoor heat exchanger 21 .

[0086] The compressor 11, the outdoor heat exchanger 12, the first throttling element 14 and the indoor heat exchanger 21 are connected by pipelines to form a first refrigerant circulation loop. The refrigerant flows in the first refrigerant circulation loop to achieve heating or cooling of the indoor environment by the convection terminal 2.

[0087] The air conditioning system 100 performs a refrigeration cycle through a first refrigerant circulation loop. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to air that has been conditioned and heat-exchanged.

[0088] Among them, one of the indoor heat exchanger 21 and the outdoor heat exchanger 12 is a condenser, and the other is an evaporator.

[0089] When the air conditioning system 100 is in heating mode, the refrigerant compressed by the compressor 11 flows into the indoor heat exchanger 21, exchanges heat with the indoor air, expands and throttles through the first throttling element 14, and flows into the outdoor heat exchanger 12 to exchange heat with the outdoor air. The refrigerant flowing out of the outdoor heat exchanger 12 flows back to the compressor 11. The refrigerant circulates among the compressor 11, the indoor unit, and the first throttling element 14.

[0090] When the air conditioning system 100 is in cooling mode, the refrigerant compressed by the compressor 11 flows into the outdoor heat exchanger 12 to exchange heat with the outdoor air, and flows into the indoor heat exchanger 21 after expansion and throttling through the first throttling element 14 to exchange heat with the indoor air, and then flows back to the compressor 11. The refrigerant circulates among the compressor 11, the outdoor heat exchanger 12, the first throttling element 14, and the indoor unit.

[0091] Since the refrigerant flow paths of the air conditioning system 100 are different when cooling and heating, in order to ensure the reliability of the refrigerant flow, the outdoor unit 1 may include a four-way valve 13. The four-way valve 13 is used to switch the refrigerant flow direction to achieve the switching of the air conditioning system 100 between cooling and heating.

[0092] Specifically, the four-way valve 13 may include a first valve port d. The first valve port d is connected to a first pipeline which is in communication with the exhaust port of the compressor 11 so that the high-temperature and high-pressure refrigerant flowing out of the exhaust port can flow to the first valve port d through the first pipeline.

[0093] The four-way valve 13 may include a second valve port s. The second valve port s is connected to a second pipeline which is in communication with the air intake of the compressor 11 so that the refrigerant in a low-temperature and low-pressure state flowing out of the second valve port s can flow back to the compressor 11 through the second pipeline.

[0094] The four-way valve 13 may include a third valve port c. The third valve port c is connected to a third pipeline, and the third pipeline is connected to the second end of the outdoor heat exchanger 12, so that the refrigerant flowing out of the second end of the outdoor heat exchanger 12 can flow to the third valve port c through the third pipeline. Alternatively, the refrigerant flowing out of the third valve port c can flow to the outdoor heat exchanger 12 through the third pipeline.

[0095] The four-way valve 13 may include a fourth valve port e. The fourth valve port e is connected to a fourth pipeline, and the fourth pipeline is communicated with the second end of the indoor heat exchanger 21, so that the refrigerant in a high-temperature and high-pressure state flowing out of the fourth valve port e can flow to the indoor heat exchanger 21 through the fourth pipeline, or the refrigerant flowing out of the indoor heat exchanger 21 can flow to the fourth valve port e through the fourth pipeline, and flow back to the compressor 11 via the four-way valve 13.

[0096] Among them, in the four-way valve 13, at the same time, the first valve port d is connected to one of the third valve port c and the fourth valve port e, and the second valve port s is connected to the other of the third valve port c and the fourth valve port e.

[0097] In some embodiments, reference Figure 1 The first refrigerant circulation loop may include a trunk line 8. The trunk line 8 is a pipeline between the first throttling element 14 and the first end of the indoor heat exchanger 21.

[0098] In some embodiments, the indoor unit may include a radiation terminal 3. A first end of the radiation terminal 3 is connected to the trunk line 8, and the radiation terminal 3 is used for radiant heat transfer with indoor air.

[0099] In some embodiments, the radiation terminal 3 may be provided in plurality, and the plurality of radiation terminals 3 are provided in parallel with each other.

[0100] In some embodiments, the radiation end 3 may be a floor heating capillary network laid on the ground, such as waterless floor heating, waterless radiator, etc.

[0101] In some other embodiments, the floor heating capillary network can also be laid on the wall to increase the radiation area of ​​the radiation end 3.

[0102] refer to Figure 2 The outdoor unit 1 may include a three-way proportional valve 15. The three-way proportional valve 15 is connected to the pipeline between the exhaust port of the compressor 11 and the four-way valve 13.

[0103] The three-way proportional valve 15 may include an inlet h. The inlet h is connected to the exhaust port of the compressor 11.

[0104] The three-way proportional valve 15 may include a first outlet g. The first outlet g is connected to the four-way valve 13.

[0105] The three-way proportional valve 15 may include a second outlet f. The second outlet f is connected to the second end of the radiation terminal 3.

[0106] The inlet h of the three-way proportional valve 15 may be connected to at least one of the first outlet g and the second outlet g.

[0107] The inlet h of the three-way proportional valve 15 is connected to the first outlet g. When the inlet h and the second outlet f are closed, the first refrigerant circulation loop is connected, and the refrigerant in a high-temperature and high-pressure state flowing out of the exhaust port circulates in the first refrigerant circulation loop through the passage hg.

[0108] The inlet h of the three-way proportional valve 15 is connected to the second outlet f, and when the inlet h and the first outlet g are closed, the exhaust port of the compressor 11 is connected to the second end of the radiation terminal 3 through the passage hf, and the first end of the radiation terminal 3 is connected to the main circuit 8, so that the radiation terminal 3 is connected to part of the first refrigerant circulation circuit (compressor 11, outdoor heat exchanger 12, first throttling element 14 and the pipeline therebetween) to form a second refrigerant circulation circuit.

[0109] When the inlet h of the three-way proportional valve 15 is connected to the second outlet f and the first outlet g is both connected, a part of the refrigerant in a high-temperature and high-pressure state flowing out of the exhaust port circulates in the first refrigerant circulation loop to achieve heating or cooling of the indoor environment at the convection terminal 2; the other part circulates in the second refrigerant circulation loop to achieve heating at the radiation terminal 3.

[0110] In this embodiment, the three-way proportional valve 15 is used as a proportional regulating valve. During heating, the refrigerant distribution ratio can be adjusted by adjusting the three-way proportional valve 15, and the opening and closing of the convection terminal 2 and the radiation terminal 3 and the heat distribution ratio can be flexibly controlled.

[0111] In some embodiments, the three-way proportional valve 15 may be a three-way ball valve. By utilizing the low leakage rate characteristic of the three-way ball valve, when heating with the radiation terminal 3 opened alone or the convection terminal 2 opened alone, the amount of refrigerant migration into the indoor heat exchanger 21 or the floor heating capillary network is reduced, thereby enhancing the stability of the operation of the air conditioning system 100.

[0112] In some embodiments, a first stop valve 51 is connected to the pipeline between the second outlet f and the second end of the radiation terminal 3 .

[0113] refer to Figure 2 The pipeline between the second outlet f and the second end of the radiation terminal 3 is the fifth pipeline. The first stop valve 51 is arranged on the fifth pipeline to control the opening and closing of the fifth pipeline, thereby controlling whether the refrigerant flows from the compressor 11 to the radiation terminal 3.

[0114] In some embodiments, a second stop valve 52 is connected to the pipeline between the four-way valve 13 and the second end of the indoor heat exchanger 21 .

[0115] refer to Figure 2 The pipeline between the four-way valve 13 and the second end of the indoor heat exchanger 21 is the fourth pipeline. The second stop valve 52 is arranged on the fourth pipeline to control the on-off of the fourth pipeline, thereby controlling whether the refrigerant flows from the compressor 11 into the indoor heat exchanger 21.

[0116] In some embodiments, the indoor unit may include a second electric ball valve 4 . One end of the second electric ball valve 4 is connected to the first end of the radiation terminal 3 , and the other end of the second electric ball valve 4 is connected to the trunk 8 .

[0117] Specifically, refer to Figure 3 The first end of the radiation terminal 3 is connected to the trunk line 8 through the sixth pipeline, and the second electric ball valve 4 is arranged on the sixth pipeline.

[0118] By providing the second electric ball valve 4 , the flow of the refrigerant in the sixth pipeline can be adjusted, and the second electric ball valve 4 can control the on-off of the sixth pipeline, that is, control the on-off between the radiation terminal 3 and the trunk 8 .

[0119] When the radiation terminal 3 is not needed to operate, the second electric ball valve 4 can be closed to prevent the refrigerant from entering the radiation terminal 3 and to prevent the refrigerant in the trunk line 8 from migrating into the convection terminal 2 .

[0120] By utilizing the low leakage rate characteristic of the second electric ball valve 4, the amount of refrigerant migration into the floor heating capillary network (radiation end 3) during heating is reduced, thereby enhancing the operational stability of the air conditioning system 100. At the same time, by arranging the second electric ball valve 4 in conjunction with the three-way proportional valve 15, the control of the refrigerant flow rate can be more accurate.

[0121] In some embodiments, a third stop valve 53 is provided on the main line 8 .

[0122] refer to Figure 3 By setting a third stop valve 53 on the main line 8 to control the on-off of the main line 8, it is controlled whether the refrigerant flows from the indoor unit to the outdoor heat exchanger 12.

[0123] In some embodiments, reference Figure 2 , Figure 4 A high-pressure liquid reservoir 18 is provided on the trunk line 8. The high-pressure liquid reservoir 18 is located between the first throttling element 14 and the third stop valve 53. The high-pressure liquid reservoir 18 is used to store high-pressure liquid from the condenser to ensure that the condenser can fully release heat.

[0124] In some embodiments, the compressor 11 is an air-supplementing and enthalpy-increasing compressor 11. The compressor 11 may include an air-supplementing port. The air-supplementing port is connected to an air-supplementing pipeline 194.

[0125] In some embodiments, reference Figure 3 The main line 8 is provided with an air supply module 19. The air supply module 19 may be located between the first throttling element 14 and the third stop valve 53, and the air supply module 19 is connected to the air supply port of the compressor 11 through an air supply pipeline 194.

[0126] refer to Figure 4 The air supply module 19 may include an economizer 191. The economizer 191 is disposed on the trunk line 8, and the economizer 191 is connected to the air supply port through an air supply pipeline 194.

[0127] The air supply module 19 may include a bypass line 192. The bypass line 192 connects the economizer 191 with the trunk line 8. Figure 4 The economizer 191 is connected between the bypass pipeline 192 and the air supply pipeline 194 .

[0128] The air supply module 19 may include an auxiliary expansion valve 193. The auxiliary expansion valve 193 is connected to the bypass line 192 to control the on-off of the bypass line 192. The economizer 191 can control the air supply amount of the compressor 11 through the auxiliary expansion valve 193, and enter or exit the air supply mode of the compressor 11 by opening or closing the auxiliary expansion valve 193.

[0129] refer to Figure 3In this embodiment, the air replenishing module 19 is located between the high-pressure liquid reservoir 18 and the third stop valve 53 .

[0130] Specifically, the economizer 191 is provided with a first passage and a second passage which are not connected to each other and can perform heat exchange. The first passage is provided in the trunk 8. One end of the second passage is connected to an end of the bypass line 192 away from the trunk 8, and the other end of the second passage is connected to an end of the air supply line 194 away from the air intake port.

[0131] refer to Figure 4 The first port A and the second port B of the economizer 191 are communicated through the first passage. The third port C and the fourth port D of the economizer 191 are communicated through the second passage.

[0132] The economizer 191 is a common component in the prior art, and its working principle is not elaborated here. Its function is to absorb heat through the throttling evaporation of the refrigerant itself so as to supercool another part of the refrigerant.

[0133] It should be noted that, in this embodiment, when the economizer 191 is in the closed state, the first path is in the closed state and the second path is in the conducting state. When the economizer 191 is in the open state, both the first path and the second path are in the conducting state.

[0134] In the heating mode, when the economizer 191 is in the on state and the auxiliary expansion valve 193 is open, a portion of the refrigerant flowing out of the indoor heat exchanger 21 passes through the auxiliary expansion valve 193 and enters the first passage.

[0135] The refrigerant is throttled by the auxiliary expansion valve 193 and further cooled by thermal expansion, so that the refrigerant in the second path is vaporized, thereby reducing the temperature of another part of the refrigerant.

[0136] The stabilized supercooled liquid enters the outdoor heat exchanger 12 through the second passage for heating, thereby increasing the supercooling degree of the refrigerant entering the outdoor heat exchanger 12 and reducing the refrigeration load.

[0137] At the same time, the gaseous refrigerant re-enters the compressor 11 through the air supply line 194 to continue to be compressed and enters the cycle to improve the capacity and efficiency of the system.

[0138] In some embodiments, the outdoor unit 1 may include a one-way valve 141 . The one-way valve 141 is arranged in parallel with the first throttling element 14 , so that the refrigerant flowing out of the outdoor heat exchanger 12 can flow into the trunk line 8 through the one-way valve 141 .

[0139] In some embodiments, the convection terminal 2 includes a second throttling element 22. The first end of the indoor heat exchanger 21 is connected to the trunk line 8 through the second throttling element 22.

[0140] refer to Figure 3The first end of the indoor heat exchanger 21 is connected to a seventh pipeline, and the other end of the seventh pipeline is connected to the trunk line 8. A second throttling element 22 is arranged on the seventh pipeline.

[0141] When the air conditioning system 100 is cooling, the refrigerant flowing out of the outdoor heat exchanger 12 can be throttled by the first throttling element 14. When the refrigerant flow rate flowing out of the outdoor heat exchanger 12 is large, a part of the refrigerant can first flow into the trunk 8 through the one-way valve 141 to avoid reducing the refrigerant flowing into the indoor unit due to the throttling of the refrigerant by the first throttling element 14.

[0142] Although the refrigerant flowing through the one-way valve 141 is not throttled by the first throttling element 14, the second throttling element 22 will throttle the refrigerant flowing into the indoor heat exchanger 21. Therefore, the fact that part of the refrigerant is not throttled by the first throttling element 14 has little effect on the temperature performance and reliability of the air-conditioning system 100.

[0143] In some other embodiments, the second throttling element 22 can be used as a refrigeration expansion valve. When the air conditioning system 100 is refrigerating, the first throttling element 14 can be closed, and the refrigerant flowing out of the outdoor heat exchanger 12 can flow into the trunk 8 through the one-way valve 141, and then flow through the second throttling element 22 on the seventh pipeline for throttling.

[0144] When the convection terminal 2 is in operation, the refrigerant flowing out of the indoor heat exchanger 21 can enter the trunk line 8 after being throttled once by the second throttling element 22, and enter the outdoor heat exchanger 12 after being throttled twice by the first throttling element 14.

[0145] When the convection terminal 2 is not needed to operate, the second throttling element 22 can be closed to prevent the refrigerant from entering the indoor heat exchanger 21 and to prevent the refrigerant in the trunk line 8 from migrating into the convection terminal 2 .

[0146] In some embodiments, the outdoor unit 1 may include a first valve 7. The first valve 7 is connected to the exhaust port of the compressor 11, so that the refrigerant discharged from the exhaust port flows through the first valve 7 and flows in the first refrigerant circulation loop and the second refrigerant circulation loop.

[0147] In this embodiment, reference Figure 3 The first valve 7 is connected to the pipeline between the exhaust port and the inlet h of the three-way proportional valve, and is used to control the connection or disconnection between the exhaust port and the inlet.

[0148] The high-temperature and high-pressure refrigerant flowing out of the exhaust port can flow into the three-way proportional valve 15 through the first valve 7 in the on state.

[0149] In some embodiments, the air conditioning system 100 may include a water heater tank 6. The water heater tank 6 includes a heat exchange coil 6, and the heat exchange coil 6 is arranged in parallel with the first valve 7.

[0150] It should be noted that the water heater tank 6 is disposed in the outdoor unit 1, and may also be disposed in the indoor unit.

[0151] The water heater tank 6 may include a water inlet, which may be connected to a tap water inlet.

[0152] The water heater tank 6 may include a water outlet. The water outlet may be connected to a sanitary ware or a water valve.

[0153] Wherein, water valves may be provided at the water inlet and the water outlet.

[0154] refer to Figure 4 A heat exchange coil 6 is provided in the water tank 6 of the water heater, and the heat exchange coil 6 is used for heat exchange between the refrigerant in a high-temperature and high-pressure state and the aqueous solution in the water tank.

[0155] One end of the heat exchange coil 6 can be connected to the exhaust port, and the other end of the heat exchange coil 6 can be connected to the inlet of the three-way valve. The heat exchange coil 6 is arranged in parallel with the first valve 7, so that the first valve 7 can control the amount of refrigerant entering the heat exchange coil 6.

[0156] In some embodiments, the first valve 7 may be a first electric ball valve, which is connected in parallel at both ends of the heat exchange coil 6 and can flexibly control the amount of refrigerant entering the heat exchange coil 6, thereby controlling the heating power.

[0157] When the convection terminal 2 in the air-conditioning system 100 is cooling, the first valve 7 (first electric ball valve) can be closed, so that the high-temperature and high-pressure refrigerant flowing out of the exhaust port of the compressor 11 flows through the heat exchange coil 6 and then enters the outdoor heat exchanger 12 for condensation.

[0158] The air conditioning system 100 provided in this embodiment not only allows the water heater tank 6 to coexist with the radiation terminal 3, but also can recover the heat of the convection terminal 2 when the convection terminal 2 is in cooling operation, and recover the heat to the heat exchange coil 6 for reuse in heating the water heater tank 6, thereby avoiding direct release of heat to the outdoors.

[0159] In some embodiments, the outdoor unit 1 may include an oil separator 161. The oil separator 161170 is used to separate lubricating oil from the high-temperature and high-pressure refrigerant discharged from the compressor 11.

[0160] The oil separator 161 is connected in series to the pipeline between the exhaust port and the inlet, and the oil return port of the oil separator 161 is connected to the suction port of the compressor 11 through the oil return capillary 162 .

[0161] Specifically, refer to Figure 5 , Figure 7The air inlet of the oil separator 161 is connected to the exhaust port of the compressor 11, the air outlet of the oil separator 161 is connected to the inlet h of the three-way proportional valve 15, and the oil return port at the lower end of the oil separator 161 is connected to the air intake port of the compressor 11 through the oil return capillary 162, so that the lubricating oil separated by the oil separator 161 can flow into the compressor 11 through the oil return capillary 162 and the air intake port.

[0162] In some embodiments, the outdoor unit 1 may include a bypass solenoid valve 163. The bypass solenoid valve 163 is arranged in parallel with the oil return capillary tube 162 through a branch line, and the bypass solenoid valve 163 is used to balance the pressure in the pipeline where the oil return capillary tube 162 is located.

[0163] In some embodiments, the outdoor unit 1 may include a gas-liquid separator 17. The gas-liquid separator 17 is used to separate the refrigerant into gas and liquid.

[0164] refer to Figure 7 The gas-liquid separator 17 can be arranged at the air intake of the compressor 11.

[0165] The gas-liquid separator 17 separates the refrigerant returning from the evaporator to the compressor 11 into gas and liquid, and returns only the gas to the compressor 11, thereby preventing the liquid refrigerant from entering the compressor 11 and preventing the compressor 11 from liquid hammer.

[0166] Taking the convection terminal 2 as a duct machine and the radiation terminal 3 as a floor heating capillary network as an example, by controlling the three-way valve and the electric ball valve, eight working modes of cooling and heating can be switched, namely duct machine cooling mode, duct machine cooling + hot water mode, duct machine heating mode, duct machine heating + hot water mode, floor heating heating, floor heating heating + hot water mode, duct machine heating + floor heating heating mode, and duct machine heating + floor heating heating + hot water mode.

[0167] In order to further understand the technical solution of this embodiment, refer to Figure 8-Figure 16 , various working modes of the air conditioning system 100 in this embodiment are specifically described as follows:

[0168] Duct cooling mode:

[0169] The first valve 7 of the outdoor unit 1 is opened, the hg passage in the three-way proportional valve 15 is open (the hf passage is closed), the dc passage in the four-way valve 13 is open, and the es passage is open. The second electric ball valve 4 connected to the first end of the floor heating capillary network is closed, and the economizer 191 is closed.

[0170] refer to Figure 8, which is the flow path of the refrigerant in the duct refrigeration mode, wherein the direction of the arrow is the flow direction of the refrigerant, the red line segment represents the refrigerant path from the exhaust port of the compressor 11 to the evaporator in this mode, and the red line segment represents the refrigerant path from the evaporator to the gas-liquid separator 17.

[0171] refer to Figure 8 After the high-temperature and high-pressure refrigerant is discharged from the exhaust port of the compressor 11, it reaches the oil separator 161 through the first valve 7 for oil and gas separation. The gas discharged from the oil separator 161 enters the inlet h of the three-way proportional valve 15, enters the first valve port d of the four-way valve 13 from the first outlet g, and then enters the (outdoor heat exchanger 12) from the third valve port c of the four-way valve 13 for condensation.

[0172] The condensed liquid refrigerant enters the high-pressure liquid storage tank 18 after bypassing the one-way valve 141, then passes through the economizer 191, reaches the second throttling element 22 through the third stop valve 53, and then enters the indoor heat exchanger 21 (evaporator) of the duct unit for evaporation and heat absorption. The evaporated steam enters the fourth valve port e of the four-way valve 13 through the first stop valve 51, enters the gas-liquid separator 17 through the second valve port s, and finally enters the compressor 11 through the air intake port for compression again, completing the entire refrigeration cycle.

[0173] Duct cooling + hot water mode:

[0174] The first valve 7 of the outdoor unit 1 is closed, the hg passage in the three-way proportional valve 15 is open (the hf passage is closed), the dc passage and the es passage in the four-way valve 13 are open. The electric ball valve connected to the first end of the floor heating capillary network is closed, and the economizer 191 is closed.

[0175] refer to Fig. 9 , which is the flow path of the refrigerant in the duct cooling mode + hot water heating mode, where the arrow direction is the refrigerant flow direction, the red line segment represents the refrigerant path from the exhaust port of the compressor 11 to the evaporator in this mode, and the red line segment represents the refrigerant path from the evaporator to the gas-liquid separator 17.

[0176] refer to Fig. 9 After the high-temperature and high-pressure refrigerant is discharged from the exhaust port of the compressor 11, it first passes through the heat exchange coil 6 to heat the water heater tank 6, and then enters the oil separator 161 for oil and gas separation. The gas discharged from the oil separator 161 enters the inlet h of the three-way proportional valve 15, enters the first valve port d of the four-way valve 13 from the first outlet g, and then enters the third valve port c of the four-way valve 13 (outdoor heat exchanger 12) for condensation.

[0177] The condensed liquid refrigerant enters the high-pressure liquid storage tank 18 after bypassing the one-way valve 141, and then passes through the economizer 191 and the third stop valve 53 to reach the second throttling element 22. After throttling and reducing the pressure by the second throttling element 22, it enters the indoor heat exchanger 21 (evaporator) of the air duct unit for evaporation and heat absorption. The evaporated steam enters the fourth valve port e of the four-way valve 13 through the first stop valve 51, enters the gas-liquid separator 17 through the second valve port s, and finally enters the compressor 11 through the air intake port for compression again, completing the entire refrigeration cycle.

[0178] Duct heating mode:

[0179] The first valve 7 of the outdoor unit 1 is fully opened, the hg passage in the three-way proportional valve 15 is open (the hf passage is closed), the de passage and the cs passage in the four-way valve 13 are open. The electric ball valve connected to the first end of the floor heating capillary network is closed, and the economizer 191 is closed.

[0180] refer to Fig.10 , which is the flow path of the refrigerant in the duct heating mode, wherein the direction of the arrow is the flow direction of the refrigerant, the red line segment represents the refrigerant path from the exhaust port of the compressor 11 to the evaporator in this mode, and the red line segment represents the refrigerant path from the evaporator to the gas-liquid separator 17.

[0181] refer to Fig.10 After the high-temperature and high-pressure refrigerant is discharged from the exhaust port of the compressor 11, it passes through the first valve 7 and enters the oil separator 161 for oil-gas separation. The gas discharged from the oil separator 161 enters the inlet h of the three-way proportional valve 15, enters the first valve port d of the four-way valve 13 from the first outlet g, and then passes through the fourth valve port e of the four-way valve 13 through the first stop valve 51 to the indoor heat exchanger 21 of the duct unit, and releases heat and condenses indoors.

[0182] The condensed liquid refrigerant enters the outdoor unit 1 through the third stop valve 53, and then passes through the economizer 191 and the high-pressure liquid storage tank 18 in sequence to reach the first throttling element 14 for throttling and pressure reduction, and then enters the outdoor heat exchanger 12 for evaporation and heat absorption. The evaporated steam refrigerant enters the gas-liquid separator 17 through the third valve port c and the second valve port s of the four-way valve 13, and finally enters the compressor 11 through the air intake port for further compression, completing the entire refrigeration cycle.

[0183] Duct heating + hot water mode:

[0184] The first valve 7 of the outdoor unit 1 is closed, the hg passage in the three-way proportional valve 15 is open (the hf passage is closed), the de passage and the cs passage in the four-way valve 13 are open. The electric ball valve connected to the first end of the floor heating capillary network is closed, and the economizer 191 is closed.

[0185] refer to Fig.11, which is the flow path of the refrigerant in the duct heating + hot water mode, where the arrow direction is the refrigerant flow direction, the red line segment represents the refrigerant path from the exhaust port of the compressor 11 to the evaporator in this mode, and the red line segment represents the refrigerant path from the evaporator to the gas-liquid separator 17.

[0186] refer to Fig.11 After the high-temperature and high-pressure refrigerant is discharged from the exhaust port of the compressor 11, one path enters the heat exchange coil 6, and the other path passes through the first valve 7. By adjusting the opening degree of the first valve 7, the proportion of the refrigerant used for heating the water tank 6 of the water heater can be adjusted as needed.

[0187] After the refrigerant from the outlet of the heat exchange coil 6 and the first valve 7 are combined, it enters the oil separator 161 for oil and gas separation. The gas discharged from the oil separator 161 enters the inlet h of the three-way proportional valve 15, enters the first valve port d of the four-way valve 13 from the first outlet g, and then enters the indoor heat exchanger 21 of the duct unit from the fourth valve port e of the four-way valve 13 through the first stop valve 51, and releases heat and condenses indoors.

[0188] The condensed liquid refrigerant enters the outdoor unit 1 through the third stop valve 53, and then passes through the economizer 191 and the high-pressure liquid storage tank 18 in sequence to reach the first throttling element 14 for throttling and pressure reduction, and then enters the outdoor heat exchanger 12 for evaporation and heat absorption. The evaporated steam refrigerant enters the gas-liquid separator 17 through the third valve port c and the second valve port s of the four-way valve 13, and finally enters the compressor 11 through the air intake port for further compression, completing the entire refrigeration cycle.

[0189] refer to Fig.16 In this mode, if the compressor 11 needs to be operated with air supply, the economizer 191 is turned on, and the auxiliary expansion valve 193 is turned on at the same time. At this time, the refrigerant flowing out of the third stop valve 53 enters the first passage through the bypass pipeline 192, and vaporizes after heat exchange with the refrigerant in the second passage of the economizer 191. The vaporized refrigerant in the first passage can be sucked into the air supply port of the compressor 11 along the air supply pipeline 194, so as to improve the energy efficiency ratio of the air conditioning system 100.

[0190] Floor heating mode:

[0191] The first valve 7 of the outdoor unit 1 is opened, the hf passage in the three-way proportional valve 15 is open (the hg passage is closed), the de passage in the four-way valve 13 is open, and the cs passage is open. The electric ball valve connected to the first end of the floor heating capillary network is closed, the economizer 191 is closed, and the second throttling element 22 is closed.

[0192] refer to Fig.12, which is the flow path of the refrigerant in the floor heating mode, wherein the direction of the arrow is the flow direction of the refrigerant, the red line segment represents the refrigerant path from the exhaust port of the compressor 11 to the evaporator in this mode, and the red line segment represents the refrigerant path from the evaporator to the gas-liquid separator 17.

[0193] refer to Fig.12 , which is the flow path of the refrigerant in the floor heating mode, wherein the direction of the arrow is the flow direction of the refrigerant, the red line segment represents the refrigerant path between the exhaust port of the compressor 11 and the evaporator, and the red line segment represents the refrigerant path between the evaporator and the gas-liquid separator 17.

[0194] refer to Fig.12 After the high-temperature and high-pressure refrigerant is discharged from the exhaust port of the compressor 11, it passes through the first valve 7 and enters the oil separator 161 for oil-gas separation. The gas discharged from the oil separator 161 enters the inlet h of the three-way proportional valve 15 and enters the floor heating capillary network from the second outlet f through the second stop valve 52. The high-temperature refrigerant releases heat and condenses in the floor heating capillary network.

[0195] The condensed liquid refrigerant flows out through the electric ball valve connected to the floor heating capillary network, and enters the outdoor unit 1 through the third stop valve 53. The condensed liquid refrigerant passes through the economizer 191 and the high-pressure liquid storage tank 18 in turn, reaches the first throttling element 14 for throttling and pressure reduction, and then enters the outdoor heat exchanger 12 for evaporation and heat absorption.

[0196] The evaporated steam enters the gas-liquid separator 17 through the third valve port c and the second valve port s of the four-way valve 13, and finally enters the compressor 11 through the air intake port for further compression, completing the entire refrigeration cycle.

[0197] If the compressor 11 needs to be operated with air supply in this mode, the economizer 191 is turned on, and the auxiliary expansion valve 193 is turned on at the same time. At this time, the refrigerant flowing out of the third stop valve 53 enters the first passage through the bypass pipeline 192, and vaporizes after heat exchange with the refrigerant in the second passage of the economizer 191. The vaporized refrigerant in the first passage can be sucked into the air supply port of the compressor 11 along the air supply pipeline 194, so as to improve the energy efficiency ratio of the air conditioning system 100.

[0198] Floor heating + hot water mode:

[0199] The first valve 7 of the outdoor unit 1 is closed, the hf passage in the three-way proportional valve 15 is open (the hg passage is closed), the de passage in the four-way valve 13 is open, and the cs passage is open. The electric ball valve connected to the first end of the floor heating capillary network is closed, the economizer 191 is closed, and the second throttling element 22 is closed.

[0200] refer to Fig.13, which is the flow path of the refrigerant in the floor heating + hot water mode, where the arrow direction is the refrigerant flow direction, the red line segment represents the refrigerant path from the exhaust port of the compressor 11 to the evaporator in this mode, and the red line segment represents the refrigerant path from the evaporator to the gas-liquid separator 17.

[0201] refer to Fig.13 After the high-temperature and high-pressure refrigerant is discharged from the exhaust port of the compressor 11, one path enters the heat exchange coil 6, and the other path passes through the first valve 7. By adjusting the opening degree of the first valve 7, the proportion of the refrigerant used for heating the water tank 6 of the water heater can be adjusted as needed.

[0202] After the refrigerants from the heat exchange coil 6 and the outlet of the first valve 7 are combined, they enter the oil separator 161 for oil and gas separation. The gas discharged from the oil separator 161 enters the inlet h of the three-way proportional valve 15 and enters the floor heating capillary network from the second outlet f through the second stop valve 52. The high-temperature refrigerant releases heat and condenses in the floor heating capillary network.

[0203] The condensed liquid refrigerant flows out through the electric ball valve connected to the floor heating capillary network, and enters the outdoor unit 1 through the third stop valve 53. The condensed liquid refrigerant passes through the economizer 191 and the high-pressure liquid storage tank 18 in turn, reaches the first throttling element 14 for throttling and pressure reduction, and then enters the outdoor heat exchanger 12 for evaporation and heat absorption.

[0204] The evaporated steam enters the gas-liquid separator 17 through the third valve port c and the second valve port s of the four-way valve 13, and finally enters the compressor 11 through the air intake port for further compression, completing the entire refrigeration cycle.

[0205] If the compressor 11 needs to be operated with air supply in this mode, the economizer 191 is turned on, and the auxiliary expansion valve 193 is turned on at the same time. At this time, the refrigerant flowing out of the third stop valve 53 enters the first passage through the bypass pipeline 192, and vaporizes after heat exchange with the refrigerant in the second passage of the economizer 191. The vaporized refrigerant in the first passage can be sucked into the air supply port of the compressor 11 along the air supply pipeline 194, so as to improve the energy efficiency ratio of the air conditioning system 100.

[0206] Duct heating + floor heating mode:

[0207] The first valve 7 of the outdoor unit 1 is opened, the h-f passage and the hg passage of the three-way proportional valve 15 are both open, the de passage and the cs passage of the four-way valve 13 are open. The electric ball valve connected to the first end of the floor heating capillary network is opened, and the second throttling element 22 is opened.

[0208] refer to Fig.14, which is the flow path of the refrigerant in the duct heating + floor heating mode, wherein the direction of the arrow is the flow direction of the refrigerant, the red line segment represents the refrigerant path from the exhaust port of the compressor 11 to the evaporator in this mode, and the red line segment represents the refrigerant path from the evaporator to the gas-liquid separator 17.

[0209] refer to Fig.14 After the high-temperature and high-pressure refrigerant is discharged from the exhaust port of the compressor 11, it passes through the first valve 7 and enters the oil separator 161 for oil-gas separation. The gas discharged from the oil separator 161 enters the inlet h of the three-way proportional valve 15. It enters the floor heating capillary network from the second outlet f through the second stop valve 52.

[0210] The other path passes through the four-way valve 13d-e from the first outlet g and then enters the indoor heat exchanger 21 of the duct unit through the first stop valve 51. The high-temperature refrigerant releases heat and condenses in the floor heating capillary network and the duct unit.

[0211] The heat distribution ratio for the duct unit and floor heating can be adjusted by adjusting the three-way proportional valve 15.

[0212] The condensed liquid refrigerant flows out through the electric ball valve connected to the first end of the floor heating capillary network and the second throttling element 22, and enters the outdoor unit 1 through the third stop valve 53 in the trunk line 8. The refrigerant of the outdoor unit 1 passes through the economizer 191 and the high-pressure liquid storage tank 18 in turn, reaches the first throttling element 14 for throttling and pressure reduction, and then enters the outdoor heat exchanger 12 for evaporation and heat absorption.

[0213] The evaporated steam enters the gas-liquid separator 17 through the third valve port c and the second valve port s of the four-way valve 13, and finally enters the compressor 11 through the air intake port for further compression, completing the entire refrigeration cycle.

[0214] If the compressor 11 needs to be operated with air supply in this mode, the economizer 191 is turned on, and the auxiliary expansion valve 193 is turned on at the same time. At this time, the refrigerant flowing out of the third stop valve 53 enters the first passage through the bypass pipeline 192, and vaporizes after heat exchange with the refrigerant in the second passage of the economizer 191. The vaporized refrigerant in the first passage can be sucked into the air supply port of the compressor 11 along the air supply pipeline 194, so as to improve the energy efficiency ratio of the air conditioning system 100.

[0215] Duct heating + floor heating + hot water mode

[0216] The first valve 7 of the outdoor unit 1 is closed, the h-f passage and the hg passage of the three-way proportional valve 15 are both open, the de passage and the cs passage of the four-way valve 13 are open. The electric ball valve of the floor heating capillary network is open. The expansion valve of the duct unit is open.

[0217] refer to Fig.15, which is the flow path of the refrigerant in the duct heating + floor heating + hot water heating mode, wherein the direction of the arrow is the flow direction of the refrigerant, the red line segment represents the refrigerant path from the exhaust port of the compressor 11 to the evaporator in this mode, and the red line segment represents the refrigerant path from the evaporator to the gas-liquid separator 17.

[0218] refer to Fig.15 After the high-temperature and high-pressure refrigerant is discharged from the exhaust port of the compressor 11, one path enters the heat exchange coil 6, and the other path passes through the first valve 7. By adjusting the opening degree of the first valve 7, the proportion of the refrigerant used for heating the water tank 6 of the water heater can be adjusted as needed.

[0219] After the refrigerant from the heat exchange coil 6 and the outlet of the first valve 7 merge, it enters the oil separator 161 for oil and gas separation, and the gas discharged from the oil separator 161 enters the inlet h of the three-way proportional valve 15. It enters the floor heating capillary network from the second outlet f through the second stop valve 52.

[0220] The other path passes through the passage de in the four-way valve 13 from the first outlet g, and then enters the indoor heat exchanger 21 of the duct unit through the first stop valve 51. The high-temperature refrigerant releases heat and condenses in the floor heating capillary network and the duct unit.

[0221] The heat distribution ratio for the duct unit and floor heating can be adjusted by adjusting the three-way proportional valve 15.

[0222] The condensed liquid refrigerant flows out through the electric ball valve connected to the first end of the floor heating capillary network and the second throttling element 22, and enters the outdoor unit 1 through the third stop valve 53 in the trunk line 8. The refrigerant of the outdoor unit 1 passes through the economizer 191 and the high-pressure liquid storage tank 18 in turn, reaches the first throttling element 14 for throttling and pressure reduction, and then enters the outdoor heat exchanger 12 for evaporation and heat absorption.

[0223] The evaporated steam enters the gas-liquid separator 17 through the third valve port c and the second valve port s of the four-way valve 13, and finally enters the compressor 11 through the air intake port for further compression, completing the entire refrigeration cycle.

[0224] If the compressor 11 needs to be operated with air supply in this mode, the economizer 191 is turned on, and the auxiliary expansion valve 193 is turned on at the same time. At this time, the refrigerant flowing out of the third stop valve 53 enters the first passage through the bypass pipeline 192, and vaporizes after heat exchange with the refrigerant in the second passage of the economizer 191. The vaporized refrigerant in the first passage can be sucked into the air supply port of the compressor 11 along the air supply pipeline 194, so as to improve the energy efficiency ratio of the air conditioning system 100.

[0225] The air conditioning system 100 provided by the utility model can be connected to a radiation terminal 3 (such as waterless floor heating, waterless radiator equipment) or a traditional convection terminal 2 (multi-split terminal) by setting and controlling the opening and closing or opening ratio of the three-way proportional valve 15 and the first valve 7, and can also be connected to a water heater tank 6 to realize a heat recovery function.

[0226] The air conditioning system 100 provided by the utility model uses a three-way ball valve as a proportional regulating valve when the radiation terminal and the convection terminal 2 are connected at the same time. By adjusting the distribution ratio during heating, the opening and closing of the convection terminal 2 and the radiation terminal 3 and the heat distribution ratio can be flexibly controlled. At the same time, by utilizing the low leakage rate characteristic of the ball valve, when heating with only the floor heating or heating with only the duct machine, the amount of refrigerant migration into the duct machine or the floor heating capillary network is reduced, thereby enhancing the stability of the system operation.

[0227] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0228] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. An air conditioning system, characterized in that: An outdoor heat exchanger, used for exchanging heat with outdoor air; A compressor is used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas; A first throttling element, used for throttling the refrigerant passing therethrough; The convection end includes an indoor heat exchanger for convection heat exchange with indoor air, wherein the compressor, the outdoor heat exchanger, the first throttling element and the indoor heat exchanger are connected through pipelines to form a first refrigerant circulation loop; A radiation terminal, used for radiating heat transfer with indoor air, wherein the radiation terminal, the compressor, the outdoor heat exchanger and the first throttling element are connected through a pipeline to form a second refrigerant circulation loop; A first valve connected to the exhaust port of the compressor, so that the refrigerant discharged from the exhaust port flows through the first valve and flows in the first refrigerant circulation loop and the second refrigerant circulation loop; The water tank of the water heater comprises a heat exchange coil, and the heat exchange coil is arranged in parallel with the first valve.

2. An air conditioning system, characterized in that: include: An outdoor heat exchanger, used for exchanging heat with outdoor air; A compressor is used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas; A first throttling element, used for throttling the refrigerant passing therethrough; The convection end includes an indoor heat exchanger for convection heat exchange with indoor air, wherein the compressor, the outdoor heat exchanger, the first throttling element and the indoor heat exchanger are connected through pipelines to form a first refrigerant circulation loop; A radiation terminal, used for radiating heat transfer with indoor air, wherein the radiation terminal, the compressor, the outdoor heat exchanger and the first throttling element are connected through a pipeline to form a second refrigerant circulation loop; a first electric ball valve connected to the exhaust port of the compressor so that the refrigerant discharged from the exhaust port flows through the first electric ball valve and flows in the first refrigerant circulation loop and the second refrigerant circulation loop; The water tank of the water heater comprises a heat exchange coil, and the heat exchange coil is arranged in parallel with the first electric ball valve.

3. The air conditioning system according to claim 1 or 2, characterized in that: Also includes: A four-way valve connected to the first refrigerant circulation loop to switch the refrigerant flow direction; A three-way proportional valve connected to the pipeline between the exhaust port of the compressor and the four-way valve; The three-way proportional valve comprises an inlet, a first outlet and a second outlet, the inlet is connected to the exhaust port, the first outlet is connected to the four-way valve, and the second outlet is connected to the second end of the radiation end; The pipeline between the first throttling element and the first end of the indoor heat exchanger is a trunk line, and the first end of the radiation terminal is connected to the trunk line.

4. The air conditioning system according to claim 3, characterized in that: It also includes a second electric ball valve, one end of which is connected to the first end of the radiation end, and the other end of which is connected to the main line.

5. The air conditioning system according to claim 4, characterized in that: The convection end includes a second throttling element, and the first end of the indoor heat exchanger is connected to the main circuit through the second throttling element.

6. The air conditioning system according to claim 3, characterized in that: It also includes an oil separator, which is serially connected to the pipeline between the exhaust port and the inlet, and the oil return port of the oil separator is connected to the suction port of the compressor through an oil return capillary.

7. The air conditioning system according to claim 3, characterized in that: A third stop valve is arranged on the trunk line.

8. The air conditioning system according to claim 7, characterized in that: The main line is provided with an air supply module, the air supply module is located between the first throttling element and the third stop valve, and the air supply module is connected to the air supply port of the compressor through an air supply pipeline.

9. The air conditioning system according to claim 8, characterized in that: The gas replenishment module comprises: an economizer, disposed in the trunk line and connected to the air supply port through the air supply pipeline; A bypass pipeline connecting the economizer and the trunk line; The auxiliary expansion valve is connected to the bypass pipeline.

10. The air conditioning system according to claim 7, characterized in that: A high-pressure liquid reservoir is provided on the main line, and the high-pressure liquid reservoir is located between the first throttling element and the third stop valve.

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