Air conditioning system

Abstract

The utility model discloses an air conditioning system which comprises a refrigerant circulating system and a water circulating system. The refrigerant circulation system is configured to perform a refrigerant heat exchange cycle by using the compressor, the condenser, the evaporator, the indoor throttling device, and the outdoor throttling device. The water circulation system comprises a plate heat exchanger and a second water pipeline. The plate heat exchanger comprises a refrigerant pipeline and a first water pipeline, the first end of the refrigerant pipeline is connected with an exhaust pipeline of the compressor, and the second end of the refrigerant pipeline is connected with the refrigerant pipeline between the indoor throttling device and the outdoor throttling device. And the two ends of the second water pipeline communicate with the two ends of the first water pipeline to form a circulating water path, and the second water pipeline is configured to heat the air cooled and dehumidified by the evaporator when the refrigerant circulating system executes the cooling and dehumidifying mode. The air conditioning system can realize dehumidification without cooling, and is high in reliability and low in energy consumption.

Description

Technical Field

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

[0002] A three-pipe, non-cooling, dehumidifying air conditioning system uses dual heat exchangers and dual electronic expansion valves in the indoor units. The first row of heat exchangers cools and dehumidifies, while the second row heats and increases the temperature, achieving non-cooling dehumidification. This dual heat exchanger and dual electronic expansion valve design doubles the control complexity of a fluorine-based system, making system reliability difficult to ensure and challenging to develop and debug.

[0003] Another non-cooling dehumidification air conditioning system heats the dehumidified air by adding electric heating, which has high energy consumption.

[0004] The above information disclosed in this background technology is only used to increase the understanding of the background technology of this application. Therefore, it may contain information that does not constitute the prior art known to ordinary technicians in this field. Summary of the Invention

[0005] In view of the problems pointed out in the background technology, the present invention proposes an air-conditioning system, which realizes dehumidification without cooling, has high reliability and low energy consumption.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions:

[0007] In some embodiments of the present application, an air-conditioning system is provided, comprising: a refrigerant circulation system, configured to perform a refrigerant heat exchange cycle by using a compressor, a condenser, an evaporator, an indoor throttling device, and an outdoor throttling device; a water circulation system, comprising: a plate heat exchanger, comprising a refrigerant pipeline and a first water pipeline, the first end of the refrigerant pipeline being connected to the exhaust pipeline of the compressor, and the second end of the refrigerant pipeline being connected to the refrigerant pipeline between the indoor throttling device and the outdoor throttling device; a second water pipeline, the two ends of the second water pipeline being connected to the two ends of the first water pipeline to form a circulating water circuit, and the second water pipeline being configured to heat the air after cooling and dehumidification by the evaporator when the refrigerant circulation system performs a cooling and dehumidification mode.

[0008] The above technical solution has the following advantages or beneficial effects:

[0009] When the air conditioning system operates in non-cooling and dehumidifying mode, the indoor heat exchanger functions as an evaporator, cooling and dehumidifying the indoor air as it circulates through the indoor heat exchanger. The plate heat exchanger functions as a condenser, exchanging heat between the first water pipe and the refrigerant pipe within the plate heat exchanger. This raises the temperature of the water flowing through the first water pipe, which in turn raises the temperature of the water in the second water pipe. The air, cooled and dehumidified by the indoor heat exchanger, then flows through the second water pipe. After being heated by the second water pipe, it is discharged into the indoor space, where it is heated. This achieves non-cooling and dehumidifying effect, improving indoor comfort.

[0010] The air conditioning system utilizes heat exchange between the water circulation system and the refrigerant circulation system. The water circulation system is configured to heat the air that has been cooled and dehumidified by the refrigerant circulation system, thereby heating the cooled and dehumidified air and achieving the effect of dehumidification without cooling the room.

[0011] Compared with the three-pipe non-cooling and dehumidifying air-conditioning system in the prior art, this air-conditioning system has a simple structure and high reliability.

[0012] Compared with the conventional air-conditioning system that does not cool and dehumidify by adding electric heating, the present air-conditioning system has low energy consumption.

[0013] In some embodiments of the present application, the air-conditioning system includes: an outdoor unit, in which the compressor, the outdoor heat exchanger, and the plate heat exchanger are installed; an indoor unit, in which the indoor heat exchanger is installed, one of the outdoor heat exchanger and the indoor heat exchanger acts as a condenser, and the other acts as an evaporator; at least part of the second water pipe section is located on the air outlet side of the indoor heat exchanger to heat the air after being cooled and dehumidified by the indoor heat exchanger.

[0014] Another technical solution in the above technical solution has the following advantages or beneficial effects:

[0015] Along the air supply direction of the indoor unit, the air flows through the indoor heat exchanger and at least part of the second water pipeline in sequence. The air cooled and dehumidified by the indoor heat exchanger flows directly through at least part of the second water pipeline, which has high heating efficiency.

[0016] In some embodiments of the present application, the second water pipeline includes a coil section, which is arranged on the air outlet side of the indoor heat exchanger, and the coil section is configured to heat the air that has been cooled and dehumidified by the indoor heat exchanger.

[0017] Another technical solution in the above technical solution has the following advantages or beneficial effects:

[0018] By providing a coil section, the water pipe area on the air outlet side of the indoor heat exchanger is increased, thereby increasing the amount of water involved in heating the air, which helps to improve the air heating efficiency.

[0019] In some embodiments of the present application, the second water pipeline also includes an inlet pipeline and an outlet pipeline, the inlet pipeline is connected between the water inlet of the first water pipeline and the water outlet of the coil section, and the outlet pipeline is connected between the water outlet of the first water pipeline and the water inlet of the coil section.

[0020] Another technical solution in the above technical solution has the following advantages or beneficial effects:

[0021] The coil section is arranged in the indoor unit, and the first water pipeline is arranged in the outdoor unit. The indoor and outdoor water pipelines are connected through the water inlet pipeline and the water outlet pipeline.

[0022] In some embodiments of the present application, a water pump is provided on the water inlet pipeline.

[0023] Another technical solution in the above technical solution has the following advantages or beneficial effects:

[0024] The water pump is configured to provide power for water circulation within the water circulation system. When the air conditioning system is in heating or cooling mode, the water pump is turned off, and water in the first and second water pipes is not circulated. When the air conditioning system is in dehumidification mode (non-cooling), the water pump is turned on, and water circulates within the first and second water pipes.

[0025] In some embodiments of the present application, an expansion water tank is provided on the water outlet pipe, and the water flowing out of the first water pipe flows through the expansion water tank.

[0026] Another technical solution in the above technical solution has the following advantages or beneficial effects:

[0027] The expansion tank is configured to balance the water pressure in the water circulation system. After the water flows through the first water pipeline, the water expands due to heat. The water flows through the expansion tank to balance the water pressure, thereby maintaining a constant water pressure in the water circulation system.

[0028] In some embodiments of the present application, the indoor unit is provided with an air outlet and a return air outlet, an air duct is provided between the air outlet and the return air outlet, and the indoor heat exchanger and the coil section are provided in the air duct.

[0029] Another technical solution in the above technical solution has the following advantages or beneficial effects:

[0030] Based on the structure of the existing indoor unit, the coil section is integrated into the indoor unit, which has a compact structure, facilitates the upgrade of the existing indoor unit structure, and reduces development costs.

[0031] In some embodiments of the present application, the air-conditioning system further includes a floor heating pipeline, and both ends of the floor heating pipeline are connected to the second water pipeline.

[0032] Another technical solution in the above technical solution has the following advantages or beneficial effects:

[0033] When the air conditioning system is operating in floor heating mode, the plate heat exchanger functions as a condenser and the outdoor heat exchanger as an evaporator. Refrigerant does not flow through the indoor heat exchanger, the water pump is on, and water does not flow through the coil section of the second water line. The refrigerant circulation path is as follows: refrigerant discharged from the compressor flows through the one-way valve, the refrigerant line in the plate heat exchanger, the first throttle device, the outdoor throttle device, the outdoor heat exchanger, and then returns to the compressor through the four-way valve and gas-liquid separator. The water circulation path is as follows: water circulates through the first water line in the plate heat exchanger and the floor heating line.

[0034] By exchanging heat between the first water pipe and the refrigerant pipe in the plate heat exchanger, the water temperature in the first water pipe is increased, thereby increasing the water temperature in the floor heating pipe, achieving the floor heating effect.

[0035] In some embodiments of the present application, the water inlet end of the floor heating pipeline is connected to the second water pipeline through a three-way valve.

[0036] Another technical solution in the above technical solution has the following advantages or beneficial effects:

[0037] The three-way valve has terminals A, B, and C. It allows only connection between terminals A and C, or between terminals A and B, but not between terminals B and C. By controlling the three-way valve, the air conditioning system can quickly switch between floor heating mode and non-cooling dehumidification mode, with a simple structure.

[0038] In some embodiments of the present application, an air-conditioning system is provided, comprising: an indoor unit including an indoor heat exchanger; an outdoor unit including: a compressor; an outdoor heat exchanger; a plate heat exchanger including a refrigerant pipeline and a first water pipeline, the first end of the refrigerant pipeline being connected to the exhaust pipeline of the compressor, and the second end of the refrigerant pipeline being connected to the refrigerant pipeline between the indoor heat exchanger and the outdoor heat exchanger; a second water pipeline, the two ends of the second water pipeline being connected to the two ends of the first water pipeline to form a circulating water circuit, at least part of the pipeline section of the second water pipeline being located on the air outlet side of the indoor heat exchanger, and the second water pipeline being configured to heat the air after being cooled and dehumidified by the indoor heat exchanger.

[0039] Another technical solution in the above technical solution has the following advantages or beneficial effects:

[0040] When the air conditioning system operates in non-cooling and dehumidifying mode, the indoor heat exchanger functions as an evaporator, cooling and dehumidifying the indoor air as it circulates through the indoor heat exchanger. The plate heat exchanger functions as a condenser, exchanging heat between the first water pipe and the refrigerant pipe within the plate heat exchanger. This raises the temperature of the water flowing through the first water pipe, which in turn raises the temperature of the water in the second water pipe. The air, cooled and dehumidified by the indoor heat exchanger, then flows through the second water pipe. After being heated by the second water pipe, it is discharged into the indoor space, where it is heated. This achieves non-cooling and dehumidifying effect, improving indoor comfort.

[0041] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0043] Figure 1 is a schematic diagram of an air conditioning system according to some embodiments;

[0044] Figure 2 A schematic diagram of an air conditioning system according to some embodiments when executing a cooling mode;

[0045] Figure 3 A schematic diagram of an air conditioning system according to some embodiments when executing a heating mode;

[0046] Figure 4 A schematic diagram of an air-conditioning system according to some embodiments performing a non-cooling dehumidification mode;

[0047] Figure 5 is a schematic diagram of an air conditioning system according to some other embodiments;

[0048] Figure 6 is a schematic diagram of an air conditioning system according to some other embodiments;

[0049] Figure 7 A schematic diagram of an air-conditioning system according to some other embodiments when executing a cooling mode;

[0050] Figure 8 is a schematic diagram of an air-conditioning system according to some other embodiments when executing a heating mode;

[0051] Figure 9A schematic diagram of an air-conditioning system according to some other embodiments when executing a floor heating mode;

[0052] Figure 10 A schematic diagram of an air-conditioning system according to some other embodiments performing a non-cooling dehumidification mode;

[0053] Figure 11 is a schematic structural diagram of an indoor unit according to some embodiments;

[0054] Reference numerals:

[0055] 100, indoor unit; 110, return air vent; 120, air outlet; 130, connecting air duct;

[0056] 200, outdoor unit;

[0057] 1. Compressor; 2. High-pressure switch; 3. Pressure sensor; 4. One-way valve; 5. Four-way valve; 7. Outdoor heat exchanger; 8. Second filter; 9. Outdoor throttling device; 10. First throttling device; 11. First stop valve; 12. Second stop valve; 13. Gas-liquid separator; 14. Low-pressure switch; 15. Third filter; 16. Solenoid valve; 17. Capillary tube; 18. Plate heat exchanger; 19. First filter; 20. Water pressure switch; 21. Expansion tank; 22. Three-way valve; 23. Floor heating pipeline; 24. Water pump; 25. Indoor heat exchanger; 26. Indoor throttling device; 27. Coil section; 28. Refrigerant pipeline; 29. ​​First water pipeline; 30. Second water pipeline; 31. Water inlet pipeline; 32. Water outlet pipeline; 33. First refrigerant pipeline; 34. Second refrigerant pipeline. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0059] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0060] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0062] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0063] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0064] In some embodiments of the present application, an air conditioning system is provided, such as a natural fluorine and ground water air conditioning system, referring to Figure 1 The air conditioning system includes a refrigerant circulation system. The refrigerant circulation system is configured to perform a refrigerant heat exchange cycle using a compressor 1, a condenser, an evaporator, an indoor throttling device 26, and an outdoor throttling device 9. For example, the indoor throttling device 26 and the outdoor throttling device 9 are electronic expansion valves.

[0065] Low-temperature, low-pressure refrigerant enters compressor 1, which compresses it into high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, releasing heat into the surrounding environment through the condensation process.

[0066] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser to a low-pressure liquid. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to compressor 1. The evaporator achieves a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material being cooled. Throughout this cycle, the air conditioner regulates the temperature of the indoor space.

[0067] The outdoor unit 200 of the air conditioning system includes the compressor 1, the gas-liquid separator 13, the outdoor heat exchanger 7, and the outdoor throttle device 9. The indoor unit 100 of the air conditioning system includes the indoor heat exchanger 25 and the indoor throttle device 26.

[0068] The indoor heat exchanger 25 and the outdoor heat exchanger 7 function as either a condenser or an evaporator. When one of the outdoor heat exchanger 7 and the indoor heat exchanger 25 functions as a condenser, the other functions as an evaporator. When the indoor heat exchanger 25 functions as a condenser, the air conditioner functions as a heater in heating mode. When the indoor heat exchanger 25 functions as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0069] The air conditioning system also includes a water circulation system. This water circulation system includes a plate heat exchanger 18. The plate heat exchanger 18 includes a refrigerant pipeline 28. The plate heat exchanger 18 also includes a first water pipeline 29. The first end of the refrigerant pipeline 28 is connected to the exhaust pipe of the compressor 1, and the second end of the refrigerant pipeline 28 is connected to the refrigerant pipeline between the indoor throttling device 26 and the outdoor throttling device 9.

[0070] The water circulation system also includes a second water pipe 30. The two ends of the second water pipe 30 communicate with the two ends of the first water pipe 29 to form a circulating water circuit. When the refrigerant circulation system is in cooling and dehumidification mode, the second water pipe 30 is configured to heat the air after it has been cooled and dehumidified by the evaporator.

[0071] The air conditioning system has a cooling mode. Figure 2 When the air conditioning system is in cooling mode, indoor heat exchanger 25 functions as an evaporator, outdoor heat exchanger 7 functions as a condenser, and water in second water pipe 30 does not flow. Refrigerant discharged from compressor 1 flows sequentially through four-way valve 5, outdoor heat exchanger 7, outdoor throttling device 9, indoor throttling device 26, indoor heat exchanger 25, and then returns to compressor 1 through four-way valve 5 and gas-liquid separator 13. Figure 2 The solid arrows in the figure represent the refrigerant flow path.

[0072] The air conditioning system has a heating mode. Figure 3 When the air conditioning system is in heating mode, indoor heat exchanger 25 functions as a condenser, outdoor heat exchanger 7 functions as an evaporator, and water in second water pipe 30 does not flow. Refrigerant discharged from compressor 1 flows sequentially through four-way valve 5, indoor heat exchanger 25, indoor throttling device 26, outdoor throttling device 9, outdoor heat exchanger 7, and then returns to compressor 1 through four-way valve 5 and gas-liquid separator 13. Figure 3 The solid arrows in the figure represent the refrigerant flow path.

[0073] The air conditioning system has a non-cooling dehumidification mode. Figure 4 When the air conditioning system executes the non-cooling and dehumidifying mode, the indoor heat exchanger 25 is used as an evaporator, the plate heat exchanger 18 is used as a condenser, no refrigerant flows in the outdoor heat exchanger 7, and water circulates in the second water pipe 30. Figure 4 The solid arrows in the figure represent the refrigerant flow path, and the dotted arrows represent the water flow path.

[0074] When the air-conditioning system executes the non-cooling dehumidification mode, the circulation flow path of the refrigerant in the refrigerant circulation system is: the refrigerant discharged from the compressor 1 flows through the refrigerant pipeline 28 in the plate heat exchanger 18, the indoor throttling device 26, the indoor heat exchanger 25 in sequence, and then returns to the compressor 1 through the four-way valve 5 and the gas-liquid separator 13.

[0075] When the air conditioning system executes the non-cooling dehumidification mode, the circulating flow path of water in the water circulation system is: water circulates in the first water pipe 29 and the second water pipe 30.

[0076] When the air conditioning system operates in non-cooling and dehumidifying mode, the indoor heat exchanger 25 functions as an evaporator, cooling and dehumidifying the indoor air as it circulates through the indoor heat exchanger 25. The plate heat exchanger 18 functions as a condenser, exchanging heat between the first water pipe 29 and the refrigerant pipe 28 within the plate heat exchanger 18. This increases the temperature of the water flowing through the first water pipe 29, thereby increasing the temperature of the water in the second water pipe 30. The air, cooled and dehumidified by the indoor heat exchanger 25, then flows through the second water pipe 30. After being heated by the second water pipe 30, it is discharged into the indoor space, where its temperature is increased. This achieves non-cooling and dehumidification, improving the comfort of the occupants.

[0077] The air conditioning system utilizes heat exchange between the water circulation system and the refrigerant circulation system. The water circulation system is configured to heat the air that has been cooled and dehumidified by the refrigerant circulation system, thereby heating the cooled and dehumidified air and achieving the effect of dehumidification without cooling the room.

[0078] Compared with the three-pipe non-cooling and dehumidifying air-conditioning system in the prior art, this air-conditioning system has a simple structure and high reliability.

[0079] Compared with the non-cooling and dehumidifying air-conditioning system in the prior art that adds electric heating, the present air-conditioning system has low energy consumption.

[0080] In some embodiments of the present application, at least a portion of the second water pipe 30 is located on the air outlet side of the indoor heat exchanger 25 to heat the air after being cooled and dehumidified by the indoor heat exchanger 25 .

[0081] Along the air supply direction of the indoor unit 100, the air flows through the indoor heat exchanger 25 and at least part of the second water pipe 30 in sequence. The air cooled and dehumidified by the indoor heat exchanger 25 flows directly through at least part of the second water pipe 30, and the heating efficiency is high.

[0082] In some embodiments of this application, refer to Figure 1 and Figure 11 The second water pipe 30 includes a coil section 27 , which is disposed on the air outlet side of the indoor heat exchanger 25 . The coil section 27 is configured to heat the air after being cooled and dehumidified by the indoor heat exchanger 25 .

[0083] By providing the coil section 27, the water pipe area on the air outlet side of the indoor heat exchanger 25 is increased, thereby increasing the amount of water involved in heating the air, which helps to improve the air heating efficiency.

[0084] In some embodiments of this application, refer to Figure 1 The second water pipeline 30 further includes a water inlet pipeline 31. The water inlet pipeline 31 is connected between the water inlet of the first water pipeline 29 and the water outlet of the coil section 27.

[0085] The second water pipeline 30 further includes a water outlet pipeline 32 . The water outlet pipeline 32 is connected between the water outlet of the first water pipeline 29 and the water inlet of the coil section 27 .

[0086] The coil section 27 is provided in the indoor unit 100 , and the first water pipe 29 is provided in the outdoor unit 200 . The indoor and outdoor water pipes are connected through the water inlet pipe 31 and the water outlet pipe 32 .

[0087] In some embodiments of the present application, a water pump 24 is provided on the water inlet pipe 31. The water pump 24 is configured to provide water circulation power in the water circulation system.

[0088] When the air conditioning system is in heating mode or cooling mode, the water pump 24 is turned off, and the water in the first water pipe 29 and the second water pipe 30 does not circulate.

[0089] When the air conditioning system executes the non-cooling dehumidification mode, the water pump 24 is turned on, and water circulates in the first water pipe 29 and the second water pipe 30.

[0090] In some embodiments of the present application, an expansion tank 21 is provided on the water outlet pipe 32. Water flowing from the first water pipe 29 flows through the expansion tank 21. The expansion tank 21 is configured to balance the water pressure within the water circulation system. After the water flows through the first water pipe 29, it expands due to heat. This pressure is balanced by the water flowing through the expansion tank 21, thereby maintaining a constant water pressure within the water circulation system.

[0091] In some embodiments of the present application, a water pressure switch 20 is provided on the water outlet pipe 32. The water pressure switch 20 is configured to detect the pressure in the water line. If the pressure in the water line reaches a set water pressure threshold, the system is shut down.

[0092] In some embodiments of the present application, in the plate heat exchanger 18 , the refrigerant flow direction in the refrigerant pipe 28 is opposite to the water flow direction in the first water pipe 29 , which helps to improve the heat exchange effect.

[0093] In some embodiments of the present application, the air conditioning system further includes a low pressure switch 14, which is provided on the pipeline between the gas-liquid separator 13 and the compressor 1. The low pressure switch 14 is configured to detect the low pressure of the refrigerant in the refrigerant system.

[0094] In some embodiments of the present application, the air conditioning system further includes a high-pressure switch 2, which is disposed on the exhaust pipe of the compressor 1. The high-pressure switch 2 is configured to detect the high-pressure pressure of the refrigerant in the refrigerant system.

[0095] In some embodiments of the present application, the air-conditioning system further includes a one-way valve 4, which is arranged on the exhaust end pipeline of the compressor 1 to prevent the refrigerant from flowing back.

[0096] In some embodiments of the present application, one end of the refrigerant pipeline 28 in the plate heat exchanger 18 is connected to the exhaust end pipeline of the compressor 1 through the first refrigerant pipeline 33, and the other end is connected to the refrigerant pipeline between the indoor throttling device 26 and the outdoor throttling device 9 through the second refrigerant pipeline 34.

[0097] In some embodiments of the present application, the air conditioning system further includes a pressure sensor 3, which is disposed on the first refrigerant pipeline 33. The pressure sensor 3 is configured to disconnect the first refrigerant pipeline 33 when the high pressure of the refrigerant in the first refrigerant pipeline 33 reaches a set threshold.

[0098] In some embodiments of the present application, the air conditioning system further includes a first throttling device 10, which is disposed on the second refrigerant pipe 34. When the air conditioning system performs a non-cooling and dehumidification mode, the first throttling device 10 is fully open without throttling.

[0099] In some embodiments of the present application, the air conditioning system further includes a first filter 19 , which is disposed on the first refrigerant pipeline 33 .

[0100] In some embodiments of the present application, the air-conditioning system further includes a second filter 8 , which is arranged on the upstream and downstream pipelines of the outdoor throttling device 9 .

[0101] In some embodiments of this application, refer to Figure 5 The air conditioning system also includes a pressure relief bypass line. One end of the pressure relief bypass line is connected to the exhaust pipe of the compressor 1 and is located upstream of the one-way valve 4. The other end of the pressure relief bypass line is connected to the inlet pipe of the gas-liquid separator 13.

[0102] The pressure relief bypass line is provided with a solenoid valve 16. The pressure relief bypass line is provided with a capillary tube 17. The pressure relief bypass line is provided with a third filter 15.

[0103] The pressure relief bypass line is configured to balance the pressure in the refrigerant circulation system.

[0104] In some embodiments of the present application, the air conditioning system further includes a first stop valve 11. The first stop valve 11 is provided on the refrigerant pipeline between the indoor throttling device 26 and the outdoor throttling device 9.

[0105] The air conditioning system further includes a second stop valve 12 . The second stop valve 12 is arranged on the refrigerant pipeline between the indoor heat exchanger 25 and the four-way valve 5 .

[0106] In some embodiments of this application, refer to Figure 6 The air conditioning system also includes a floor heating pipe 23, and both ends of the floor heating pipe 23 are connected to the second water pipe 30. For example, the water inlet end of the floor heating pipe 23 is connected to the water outlet pipe 32 of the second water pipe 30, and the water outlet end of the floor heating pipe 23 is connected to the water inlet pipe 31 of the second water pipe 30.

[0107] For example, the water inlet of the floor heating pipe 23 is connected to the water outlet pipe 32 of the second water pipe 30 through the three-way valve 22. The three-way valve 22 has ends A, B, and C. The three-way valve 22 can only connect ends A and C, or A and B, but not B and C.

[0108] Reference Figure 7 When the air-conditioning system executes the cooling mode, the indoor heat exchanger 25 is used as an evaporator, the outdoor heat exchanger 7 is used as a condenser, the water pump 24 is turned off, the water in the first water pipe 29, the second water pipe 30 and the floor heating pipe 23 does not circulate, the first throttling device 10 is closed, and the refrigerant does not flow through the plate heat exchanger 18.

[0109] The refrigerant discharged from the compressor 1 flows through the one-way valve 4, the four-way valve 5, the outdoor heat exchanger 7, the outdoor throttling device 9, the first stop valve 11, the indoor throttling device 26, the indoor heat exchanger 25, the second stop valve 12, and then returns to the compressor 1 through the four-way valve 5 and the gas-liquid separator 13. Figure 7 The solid arrows in the figure represent the refrigerant flow path.

[0110] Reference Figure 8 When the air-conditioning system executes the heating mode, the indoor heat exchanger 25 is used as a condenser, the outdoor heat exchanger 7 is used as an evaporator, the water pump 24 is turned off, the water in the first water pipe 29, the second water pipe 30 and the floor heating pipe 23 does not circulate, the first throttling device 10 is closed, and the refrigerant does not flow through the plate heat exchanger 18.

[0111] The refrigerant discharged from the compressor 1 flows through the one-way valve 4, the four-way valve 5, the second stop valve 12, the indoor heat exchanger 25, the indoor throttling device 26, the second stop valve 12, the outdoor throttling device 9, the outdoor heat exchanger 7 in sequence, and then returns to the compressor 1 through the four-way valve 5 and the gas-liquid separator 13. Figure 8 The solid arrows in the figure represent the refrigerant flow path.

[0112] The air conditioning system also has a floor heating mode. When the air conditioning system is in floor heating mode, refer to Figure 9 The plate heat exchanger 18 is used as a condenser, the outdoor heat exchanger 7 is used as an evaporator, the first stop valve 11 and the second stop valve 12 are closed, the refrigerant does not flow through the indoor heat exchanger 25, the first throttling device 10 is opened, the water pump 24 is turned on, the A end and the C end of the three-way valve 22 are connected, and water does not flow through the coil section 27 of the second water pipeline 30. Figure 9 The solid arrows in the figure represent the refrigerant flow path, and the dotted arrows represent the water flow path.

[0113] When the air-conditioning system executes the floor heating mode, the circulation flow path of the refrigerant is: the refrigerant discharged from the compressor 1 flows through the one-way valve 4, the refrigerant pipeline 28 in the plate heat exchanger 18, the first throttling device 10, the outdoor throttling device 9, the outdoor heat exchanger 7, and then returns to the compressor 1 through the four-way valve 5 and the gas-liquid separator 13.

[0114] When the air-conditioning system executes the floor heating mode, the circulation flow path of the water is: the water circulates through the first water pipe 29 in the plate heat exchanger 18 and the floor heating pipe 23.

[0115] By exchanging heat between the first water pipe 29 and the refrigerant pipe 28 in the plate heat exchanger 18, the water temperature in the first water pipe 29 is increased, thereby increasing the water temperature in the floor heating pipe 23 and achieving the floor heating effect.

[0116] Reference Figure 10 When the air-conditioning system executes the non-cooling and dehumidification mode, the indoor heat exchanger 25 is used as an evaporator, the plate heat exchanger 18 is used as a condenser, the outdoor throttling device 9 is closed, no refrigerant flows in the outdoor heat exchanger 7, the first throttling device 10 is opened, the water pump 24 is opened, the A end and the B end of the three-way valve 22 are connected, the water circulates through the coil section 27, and the water does not flow through the floor heating pipe 23. Figure 10The solid arrows in the figure represent the refrigerant flow path, and the dotted arrows represent the water flow path.

[0117] When the air conditioning system is in non-cooling dehumidification mode, the refrigerant circulation path is as follows: the refrigerant discharged from compressor 1 flows through one-way valve 4, refrigerant pipe 28 in plate heat exchanger 18, first throttling device 10, first stop valve 11, indoor throttling device 26, indoor heat exchanger 25, second stop valve 12, and then returns to compressor 1 through four-way valve 5 and gas-liquid separator 13. First throttling device 10 is fully open and does not throttle.

[0118] When the air conditioning system executes the non-cooling dehumidification mode, the water circulation path is: water circulates in the first water pipe 29 and the second water pipe 30, and the water circulates through the coil section 27.

[0119] This natural fluorine and ground water air conditioning system recovers heat that would otherwise be discharged outdoors during dehumidification by the air conditioner, produces free hot water, and sends it to the coil section 27. By installing the coil section 27 at the air outlet 120 of the indoor unit 100, the coil section 27 heats the air when the indoor unit 100 dehumidifies and cools, thereby achieving the effect of dehumidification without cooling, with low energy consumption and high reliability.

[0120] In some embodiments of this application, refer to Figure 11 The indoor unit 100 is provided with an air outlet 120 and an air return port 110, an air duct is provided between the air outlet 120 and the return air port 110, and an indoor heat exchanger 25 and a coil section 27 are provided in the air duct. The coil section 27 is integrated into the indoor unit 100, and the structure is compact.

[0121] In some embodiments of the present application, based on the structure of the existing indoor unit, a connecting air duct 130 is set between the indoor unit and the coil section 27. The air after heat exchange by the indoor heat exchanger 25 flows into the indoor space through the connecting channel and the coil section 27.

[0122] The coil section 27 is integrated into the indoor unit 100 by connecting the air duct 130 , which facilitates the upgrade of the existing indoor unit 100 structure and reduces development costs.

[0123] In some embodiments of the present application, the air conditioning system includes an indoor unit 100. An indoor heat exchanger 25 is provided in the indoor unit 100.

[0124] The air conditioning system includes an outdoor unit 200. The outdoor unit 200 is provided with a compressor 1. The outdoor unit 200 is provided with an outdoor heat exchanger 7. The outdoor unit 200 is provided with a plate heat exchanger 18.

[0125] Plate heat exchanger 18 includes a refrigerant line 28. A first end of refrigerant line 28 is connected to the exhaust line of compressor 1, and a second end of refrigerant line 28 is connected to the refrigerant line between indoor heat exchanger 25 and outdoor heat exchanger 7. Plate heat exchanger 18 also includes a first water line 29.

[0126] The air conditioning system also includes a second water pipe 30. Both ends of the second water pipe 30 communicate with both ends of the first water pipe 29 to form a circulating water circuit. At least a portion of the second water pipe 30 is located on the outlet side of the indoor heat exchanger 25. The second water pipe 30 is configured to heat the air after it has been cooled and dehumidified by the indoor heat exchanger 25.

[0127] The air conditioning system performs a refrigerant heat exchange cycle by using a compressor 1, a condenser, an evaporator, an indoor throttling device 26, and an outdoor throttling device 9. For example, the indoor throttling device 26 and the outdoor throttling device 9 are electronic expansion valves.

[0128] The indoor heat exchanger 25 and the outdoor heat exchanger 7 function as a condenser or an evaporator. When one of the outdoor heat exchanger 7 and the indoor heat exchanger 25 functions as a condenser, the other functions as an evaporator.

[0129] The air conditioning system has a non-cooling and dehumidifying mode. When the air conditioning system executes the non-cooling and dehumidifying mode, the indoor heat exchanger 25 functions as an evaporator, the plate heat exchanger 18 functions as a condenser, no refrigerant flows in the outdoor heat exchanger 7, and water circulates in the second water pipe 30.

[0130] When the air-conditioning system executes the non-cooling dehumidification mode, the circulation flow path of the refrigerant is: the refrigerant discharged from the compressor 1 flows through the refrigerant pipeline 28 in the plate heat exchanger 18, the indoor throttling device 26, the indoor heat exchanger 25 in sequence, and then returns to the compressor 1 through the four-way valve 5 and the gas-liquid separator 13.

[0131] When the air conditioning system executes the non-cooling dehumidification mode, the water circulation path is: water circulates in the first water pipe 29 and the second water pipe 30.

[0132] When the air conditioning system operates in non-cooling and dehumidifying mode, the indoor heat exchanger 25 functions as an evaporator, cooling and dehumidifying the indoor air as it circulates through the indoor heat exchanger 25. The plate heat exchanger 18 functions as a condenser, exchanging heat between the first water pipe 29 and the refrigerant pipe 28 within the plate heat exchanger 18. This increases the temperature of the water flowing through the first water pipe 29, thereby increasing the temperature of the water in the second water pipe 30. The air, cooled and dehumidified by the indoor heat exchanger 25, then flows through the second water pipe 30. After being heated by the second water pipe 30, it is discharged into the indoor space, where its temperature is increased. This achieves non-cooling and dehumidification, improving the comfort of the occupants.

[0133] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0134] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. An air conditioning system, characterized in that: Includes: A refrigerant circulation system configured to perform a refrigerant heat exchange cycle by using a compressor, a condenser, an evaporator, an indoor throttling device, and an outdoor throttling device; Water circulation system, including: The plate heat exchanger includes a refrigerant pipeline and a first water pipeline, wherein the first end of the refrigerant pipeline is connected to the exhaust pipeline of the compressor, and the second end of the refrigerant pipeline is connected to the refrigerant pipeline between the indoor throttling device and the outdoor throttling device; The second water pipeline has two ends connected to the two ends of the first water pipeline to form a circulating water circuit, and the second water pipeline is configured to heat the air after being cooled and dehumidified by the evaporator.

2. The air conditioning system according to claim 1, characterized in that The air conditioning system includes: an outdoor unit, wherein the compressor, the outdoor heat exchanger, and the plate heat exchanger are provided in the outdoor unit; an indoor unit, wherein an indoor heat exchanger is provided in the indoor unit, one of the outdoor heat exchanger and the indoor heat exchanger serves as a condenser, and the other serves as an evaporator; At least a portion of the second water pipeline is located on the air outlet side of the indoor heat exchanger to heat the air that has been cooled and dehumidified by the indoor heat exchanger.

3. The air conditioning system according to claim 2, characterized in that The second water pipeline includes a coil section, which is arranged on the air outlet side of the indoor heat exchanger. The coil section is configured to heat the air that has been cooled and dehumidified by the indoor heat exchanger.

4. The air conditioning system according to claim 3, characterized in that The second water pipeline also includes an inlet pipeline and an outlet pipeline. The inlet pipeline is connected between the water inlet of the first water pipeline and the water outlet of the coil section, and the outlet pipeline is connected between the water outlet of the first water pipeline and the water inlet of the coil section.

5. The air conditioning system according to claim 4, characterized in that A water pump is provided on the water inlet pipeline.

6. The air conditioning system according to claim 4, characterized in that An expansion water tank is provided on the water outlet pipeline, and the water flowing out of the first water pipeline flows through the expansion water tank.

7. The air conditioning system according to claim 3, characterized in that The indoor unit is provided with an air outlet and an air return outlet, an air duct is provided between the air outlet and the air return outlet, and the indoor heat exchanger and the coil section are provided in the air duct.

8. The air conditioning system according to any one of claims 1 to 7, characterized in that: The air conditioning system further includes a floor heating pipeline, and both ends of the floor heating pipeline are connected to the second water pipeline.

9. The air conditioning system according to claim 8, characterized in that The water inlet end of the floor heating pipeline is connected to the second water pipeline through a three-way valve.

10. An air conditioning system, characterized in that: Includes: Indoor unit, including indoor heat exchanger; Outdoor unit, including: compressor; outdoor heat exchanger; The plate heat exchanger includes a refrigerant pipeline and a first water pipeline, wherein the first end of the refrigerant pipeline is connected to the exhaust pipeline of the compressor, and the second end of the refrigerant pipeline is connected to the refrigerant pipeline between the indoor heat exchanger and the outdoor heat exchanger; A second water pipe, both ends of the second water pipe are connected to both ends of the first water pipe to form a circulating water circuit, at least part of the pipe section of the second water pipe is located on the air outlet side of the indoor heat exchanger, and the second water pipe is configured to heat the air after being cooled and dehumidified by the indoor heat exchanger.

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