An air conditioning and hot water system with dynamic condensation

Abstract

The application is a dynamic condensation air conditioner hot water system, mainly comprising: a compressor 1, a switching four-way valve 2, a segmented outdoor fin heat exchanger 3, throttling capillary tubes 41-42, a heat exchanger 5 of an indoor wall-mounted machine or cabinet machine, a hot water tank 6, angle valves 71-74, one-way valves 81-85, and a fan 9. The application uses stable and reliable valve combinations to dynamically adjust the condensation area of the outdoor fin heat exchanger, so that the two areas of the heat exchanger do not interfere with each other. In the ordinary air conditioner refrigeration circuit (refrigerant balance) working condition, the entire heat exchange area of the outdoor fin heat exchanger participates in condensation, which is equivalent to an air-cooled air conditioner system. In the hot water production + air conditioner refrigeration circuit (refrigerant balance) working condition, the variable heat exchange area is used for auxiliary condensation supercooling or as a liquid accumulator, solving the unstable operation problem of the traditional heat recovery heating and ventilation system. A connecting device with a buffer throttle is designed, and the system is involved in circulation through the pressure difference of the refrigerant itself, solving the operation balance problem of the system refrigerant.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioning heat pump, in particular, to a dynamic condensation air conditioning hot water system. BACKGROUND

[0002] The working principle of air conditioning refrigeration and heat pump heating (water) is based on the "reverse Carnot / Carnot" principle, and the core of the working principle of air conditioning is reverse Carnot cycle. The air conditioning compressor of the outdoor unit compresses the refrigerant to become a high-temperature and high-pressure gas, which is cooled to a constant-temperature and high-pressure liquid through the condenser. The constant-temperature and high-pressure refrigerant is throttled and expanded, and in the indoor unit evaporator, it is converted from liquid state to gaseous state due to pressure reduction, and a large amount of heat is absorbed, and the evaporator is cooled. The fan of the indoor unit blows out cold air from the evaporator to complete the refrigeration process. The working principle of heat pump heating (water) is just the opposite, and at this time the indoor unit of the heat pump heating (water) is a condenser, which realizes heating for the indoor.

[0003] At present, air conditioners and hot water units have been further developed to meet different needs of people.

[0004] The patent CN110345636A "Heat recovery type air source heat pump water heater circulation system and working method" of Xi'an Jiaotong University Yu Jianlin, Lv Xiaolong and Liu Ye, the invention uses a supercooler to increase the supercooling degree of the cycle, reduces the temperature of the refrigerant entering the evaporator, and improves the heat exchange performance of the evaporator of the cycle system; at the same time, the heat released by the supercooler is absorbed by the evaporator again into the system, realizing the recycling of heat; the supercooler is used to preheat the air before entering the evaporator, which can improve the evaporation temperature and thus improve the heating performance coefficient of the cycle system. But this water heater often needs a large cylindrical water tank to heat and store hot water. Generally, the water tank needs 150L-400L, and the air source heat pump can only be installed on the balcony or bay window, so the large size of the water tank is not easy to coordinate with the whole home.

[0005] The patent 113983688A "A new type of heat recovery type high energy efficiency air source heat pump water heater" of Sun Qisong, Zhang Liyuan and Yan Shuaishuai of Haining Pujin New Energy Technology Co., Ltd., the invention can be powered off in time when the water temperature rises, avoiding accidents, and is safe to use, convenient to remove scale in the water tank, and keeps the cleanliness of the water heater. But when this invention produces high-temperature hot water, the refrigerant is easy to be too much, causing too much pressure.

[0006] Zhang Xinyue, Wang Hui's patent CN114811951A "Air source heat pump water heater with air replacement function", when bathing in summer and after bathing in winter, the gas containing heat and water vapor in the bathroom is sucked into the inside of the body through the air exchange assembly, then the water vapor is discharged through the drain, and then the air exchange assembly is used again to blow the gas containing heat in the inside of the cover to the evaporator, the evaporator transmits the heat energy absorbed to the air energy water heater body, and then the air energy water heater body processes to heat the cold water in the water tank. When the heating lamp is turned on after bathing in winter, the heat generated by the heating lamp is blown to the evaporator through the air exchange assembly, which not only ensures that the gas containing heat and water vapor can provide a comfortable bathing environment temperature with the heating lamp, but also fully utilizes the heat generated by the heating lamp inside the shell. However, compared with the traditional air source heat pump, the introduction of the air exchange assembly increases the initial investment and the volume of the air source heat pump.

[0007] Guangdong Finni Technology Co., Ltd. Yu Xian-deng, Huang Hai-ping, Peng Yu-kun's patent CN116202218A "Solar energy and air source heat pump water heater linkage control method, system and device", the invention sets up a circulating water pipe between the solar water heater and the air source heat pump water heater to exchange heat between the solar water heater and the air source heat pump water heater. On this basis, combined with the environmental temperature, the first water temperature in the solar water heater and the second water temperature in the air source heat pump water heater control the heat exchange between the solar water heater and the air source heat pump water heater. When the solar water heater temperature is higher and the air source heat pump water heater heat is lower, the heat exchange uses the solar water heater to heat the air source heat pump water heater, and at this time, the solar water heater is preferentially controlled to supply hot water, realizing the full use of solar energy. However, solar energy is easily affected by weather and environment, such as the plum rain season in the south, which seriously affects the operation and stability of the air source heat pump system.

[0008] The existing technology focuses on introducing multi-source heat sources for air conditioning and hot water combined supply, and the system device is relatively complex, which is suitable for large commercial systems. In small civilian systems, with the high rhythm of modern society, more and more light rental houses or small living room residences will appear, and air conditioning and domestic hot water are needed, but the installation space and budget are limited, and the heating system one-machine multi-purpose scheme will be more suitable. In the current one-machine multi-purpose scheme, air conditioning heat recovery technology is a direction, but whether it is a heat exchanger series or parallel design, there are control problems of large working condition changes, and various working condition refrigerant flow direction and gas mixing, interference problems.

[0009] Therefore, the application provides a dynamic condensing air conditioner hot water system, which adopts conventional switching four-way valves, check valves, angle valves and other basic components in a single cycle unit, realizes free combined supply of air conditioning and domestic hot water through appropriate pipeline connection and reasonable operation method of component switching, and gives a stable and feasible one-machine multi-purpose scheme. SUMMARY

[0010] In order to solve the above technical problems, the application aims to provide a dynamic condensing air conditioner hot water system design scheme with simple structure, complete functions and reliable operation, so as to realize one-machine multi-functional application.

[0011] The application provides a dynamic condensing air conditioner hot water system. The system mainly proposes a scheme that the heat exchange area of the condenser can be dynamically changed, introduces a double working mode of hot water production + air conditioner refrigeration, innovatively realizes one-machine multi-functional green energy-saving application, and solves the control problems of the traditional heat recovery air conditioner and hot water multi-functional unit, the difficult adjustment problems of the large change of refrigerant demand under partial working conditions, and the refrigerant flow direction and gas mixing and interference problems under various working conditions.

[0012] The application solves the problems and adopts the technical scheme: the dynamic condensing air conditioner hot water system comprises a compressor, a switching four-way valve, a segmented outdoor fin heat exchanger, a capillary tube, a heat exchanger of an indoor wall-mounted machine or a cabinet machine, a domestic hot water tank, an angle valve, a check valve and an outdoor fan.

[0013] The ordinary air conditioner refrigeration circuit (refrigerant balance) comprises two aspects: 1, a main circuit: a compressor 1 (an exhaust port), a switching four-way valve 2 (D port and C port are connected), an upper part of an outdoor fin heat exchanger 3, a check valve 82, a lower part of the outdoor fin heat exchanger 3, a check valve 83, check valves 84-85, a throttling capillary tube 42, an angle valve-liquid 73 (fully open), a heat exchanger 5 of an indoor wall-mounted machine or a cabinet machine, an angle valve-gas 74 (fully open), a compressor 1 (a gas inlet), 2, an auxiliary circuit: a compressor 1 (a gas inlet), a switching four-way valve 2 (E port and S port are connected), a throttling capillary tube 41 and a check valve 81, an angle valve 71, a domestic hot water tank 6, an angle valve 72 and a check valve 83.

[0014] The hot water production + air conditioning refrigeration circuit (refrigerant balance) includes two aspects 1, main circuit: compressor 1 (exhaust port), switching four-way valve 2 (D port and E port connection), throttling capillary 41 and check valve 81, angle valve 71 (full open), hot water tank 6, angle valve 72 (full open), check valve 83, check valve 82, outdoor fin heat exchanger 3 lower part, check valve 84, check valve 85, throttling capillary 42, angle valve-liquid 73 (full open), indoor wall hanging machine or cabinet machine heat exchanger 5, angle valve-gas 74 (full open), compressor 1 (return air port); 2, auxiliary circuit: compressor 1 (return air port), switching four-way valve 2 (C port and S port connection), outdoor fin heat exchanger 3 lower part, check valve 82 and check valve 85.

[0015] The refrigerant recovery circuit includes two aspects: 1, main circuit: compressor 1 (exhaust port), switching four-way valve 2 (D port and C port connection), outdoor fin heat exchanger 3 upper part, check valve 82, outdoor fin heat exchanger 3 lower part, check valve 83, check valve 84-85, throttling capillary 42, angle valve-liquid 73 (first close), indoor wall hanging machine or cabinet machine heat exchanger 5, angle valve-gas 74 (second close), compressor 1 (return air port); 2, auxiliary circuit: compressor 1 (return air port), switching four-way valve 2 (E port and S port connection), throttling capillary 41 and check valve 81, angle valve 71 (second close), hot water tank 6, angle valve 72 (first close), check valve 83.

[0016] Further, the dynamic condensation air conditioning hot water system is characterized in that when the ordinary air conditioning refrigeration circuit (refrigerant balance), the entire heat exchange area of the outdoor fin heat exchanger serves as the normal air-cooled condenser effect, and the inlet is the full gaseous refrigerant of the compressor exhaust; when the hot water production + air conditioning refrigeration circuit (refrigerant balance), only the lower part of the outdoor fin heat exchanger serves as the function of the supercooling condenser + liquid reservoir, and the inlet is the liquid or gas-liquid mixed state refrigerant of the hot water tank. Further design features are that when the outlet of the hot water tank is liquid refrigerant, the lower part of the outdoor fin heat exchanger serves as the function of the liquid reservoir, the outdoor fan can not work, the stable liquid supply temperature ensures the indoor unit evaporation temperature, and when the outlet of the hot water tank is gas-liquid mixed state refrigerant, the lower part of the outdoor fin heat exchanger serves as the function of the supercooling condenser, the outdoor fan can work, forming the function of forced air cooling and supercooling, which can reduce the unstable working condition of the hot water heat exchanger at high temperature and high pressure, and even if the water temperature rises, the stable liquid supply temperature can be ensured, thereby ensuring the indoor unit evaporation temperature.

[0017] Further, the dynamic condensing air conditioner hot water system is characterized in that the one-way valve 82, the one-way valve 83, the one-way valve 84 and the one-way valve 85 form a comprehensive assembly with the functions of adjusting the refrigerant flow direction, function conversion and refrigerant isolation. When the normal air conditioner refrigeration circuit (refrigerant balance) is used, the one-way flow functions of the one-way valve 82, the one-way valve 84 and the one-way valve 85 enable the entire outdoor fin heat exchanger to be in full function of air-cooled condensation, and the one-way flow function of the one-way valve 83 isolates the flow transmission between the refrigerant and the domestic hot water tank 6, thereby reducing the interference to the normal air conditioner refrigeration circuit. When the hot water preparation + air conditioner refrigeration circuit (refrigerant balance) is used, the one-way flow functions of the one-way valve 82 and the one-way valve 85 isolate the flow transmission between the refrigerant and the upper part of the outdoor fin heat exchanger 3, and the one-way flow functions of the one-way valve 83 and the one-way valve 84 enable the lower part of the outdoor fin heat exchanger 3 to realize the function conversion of subcooling condensation + liquid accumulator, thereby stabilizing the working condition operation.

[0018] Further, the dynamic condensing air conditioner hot water system is characterized in that the switching four-way valve is not a traditional cold and hot conversion tool, but functions to switch different condensing heat exchangers on the condensing side. Regardless of the powered or unpowered state of the switching four-way valve, only two interfaces of the switching four-way valve truly participate in the corresponding main circuit circulation operation to switch the condensing heat exchanger, and the other two interfaces only communicate with the low-pressure pipeline of the compressor return gas on the auxiliary circuit.

[0019] Further, the dynamic condensing air conditioner hot water system is characterized in that the domestic hot water tank 6, the throttling capillary tube 41 and the one-way valve 81 form a device for buffering the pressure difference and balancing the refrigerant. When the hot water preparation + air conditioner refrigeration circuit (refrigerant balance) is switched and the system is restored to the normal air conditioner refrigeration circuit (refrigerant balance), the state of the domestic hot water tank 6 is still in the high-temperature and high-pressure area, and the domestic hot water tank 6 still stores part of the system refrigerant. In order to meet the demand of the refrigerant in the normal air conditioner refrigeration circuit (refrigerant balance) and prevent the instability of the insufficient system refrigerant circulation amount, the throttling capillary tube 41 and the one-way valve 81 are combined to form a one-way communication device with throttling. The high-temperature and high-pressure refrigerant stored in the domestic hot water tank 6 is throttled and regulated by the throttling capillary tube 41, thereby buffering and balancing the system pressure, and enabling the refrigerant to return to the low-pressure side of the compressor and participate in the circulation.

[0020] Due to the above scheme, the present application has the following advantages compared with the prior art.

[0021] 1. The application utilizes the above-mentioned throttling balance communication device, on the one hand, under certain working conditions, the low-pressure side of the compressor can be back-pressured by the pressure difference of the refrigerant itself to achieve refrigerant self-balancing. On the other hand, the stable and reliable one-way valve does not interfere with the two regions of the finned heat exchanger when producing hot water.

[0022] 2. The application utilizes one-third of the segmented outdoor finned heat exchanger and outdoor machine auxiliary condensation and subcooling to reduce the refrigerant temperature and pressure, solves the problem of high condensation temperature and high exhaust temperature of the air conditioning system in the traditional heat pump technology and heat recovery working condition.

[0023] 3. The application utilizes the structure design and system optimization scheme to make the system have sufficient refrigerant circulation under various working conditions. In the traditional heat recovery air conditioning system, when the water temperature of the series heat recovery heat exchanger is low, the condensation temperature will be low, and when the condensation pressure is too low, the expansion valve cannot obtain sufficient pressure drop at both ends, which makes it difficult to provide appropriate refrigerant to the evaporator. On the one hand, the system's refrigeration capacity cannot meet the requirements, and on the other hand, it will cause frequent low-pressure alarm and high-temperature exhaust alarm failures. The throtting balance communication device and the switching four-way valve used on the high-pressure side can better solve the circulation participation and operation balance of the refrigerant under different working conditions, and the system will be more stable and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The working principle diagram of the dynamic condensing air conditioning hot water system of the application.

[0025] Figure 2 The working principle diagram of the dynamic condensing air conditioning hot water system of the application.

[0026] Figure 3 The working principle diagram of the dynamic condensing air conditioning hot water system of the application.

[0027] Figure 4 The working principle diagram of the component switching four-way valve of the application, which is the working state diagram when the coil is not powered.

[0028] Figure 5 The working principle diagram of the component switching four-way valve of the application, which is the working state diagram when the coil is powered.

[0029] REFERENCE NUMERALS:

[0030] The compressor 1, the switching four-way valve 2, the segmented outdoor fin heat exchanger 3, the capillary tubes 41-42, the heat exchanger 5 of the indoor wall-mounted or cabinet air conditioner, the hot water tank 6, the angle valves 71-74, the one-way valves 81-85, and the outdoor fan 9. DETAILED DESCRIPTION

[0031] The application will be further described below in conjunction with the drawings and specific embodiments. The following embodiments are used to illustrate the basic principles, main features and advantages of the application. The step numbers in the following embodiments are only set for the convenience of description, and the order between the steps is not limited. The execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.

[0032] In the description of the application, the meaning of multiple is more than two, and if the first and the second are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features. In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art. The terms used in the specification are only used to describe specific embodiments and are not intended to limit the application.

[0033] Referring to Figure 1 , the embodiment of the application provides a flow diagram of a dynamic condensation air conditioning hot water system, which is also a practical and applicable scheme.

[0034] Referring to Figure 2The embodiment of the present application provides a general air conditioner refrigeration circuit (refrigerant balance) flow process schematic diagram of the dynamic condensation air conditioner hot water system, and when working, system refrigerant flow direction contains two circuits, which are a main circuit: high temperature and high pressure refrigerant gas of the compressor 1 (exhaust port) enters the switching four-way valve 2 (D port and C port are connected), then flows through the upper part of the outdoor fin heat exchanger 3, at the same time, passes through the one-way valve 82, because there is one-way blocking of the one-way valve 83, the refrigerant flows to the lower part of the outdoor fin heat exchanger 3 in the same state, is condensed into medium temperature and high pressure liquid or gas-liquid state refrigerant after heat dissipation of the outdoor fan 9, and flows to the one-way valves 84-85 respectively, under the action of the throttling capillary tube 42, the refrigerant becomes low pressure gas-liquid mixture, enters the heat exchanger 5 of the indoor wall-mounted machine or cabinet machine through the angle valve-liquid 73 (fully open) to perform evaporation, reduces circulating air of the target room, and returns to the compressor 1 (return air port) through the angle valve-gas 74 (fully open), so that a single refrigeration cycle process is completed; and a secondary circuit: the compressor 1 (return air port) is communicated with the switching four-way valve 2 (E port and S port are connected), then is connected with the combination of the throttling capillary tube 41 and the one-way valve 81, is communicated with the interface of the angle valve 71 and the hot water tank 6, and the other interface of the hot water tank 6 is communicated with the angle valve 72 and is connected with the one-way valve 83, because the refrigerant of the main circuit is limited in direction by the one-way valve 83, the high temperature and high pressure refrigerant gas of the main circuit cannot enter the secondary circuit. At this time, the secondary circuit is communicated with the return air port of the compressor, is at the low pressure side of the system, when the hot water tank 6 is at different temperatures, according to different pressure changes and different refrigerant storage conditions, the refrigerant participating in system operation can be dynamically adjusted, refrigerant balance is maintained, and system operation stability is kept.

[0035] Referring to Figure 3, the embodiment of the present application provides a water heating system of the dynamic condensation air conditioner refrigeration circuit (refrigerant balance) process schematic diagram, when working, system refrigerant flow contains two circuits, which are main circuit: high temperature and high pressure refrigerant gas of compressor 1 (exhaust port) enters switching four-way valve 2 (D port and E port are connected), and passes through throttling capillary 41 and one-way valve 81, at this time, one-way valve 81 is on, therefore, refrigerant flows to domestic hot water tank 6 through angle valve 71 (full opening) in the same state when exhausting, becomes high-pressure liquid refrigerant after condensation cooling, and flows to one-way valve 83 through angle valve 72 (full opening), here, because of the direction restriction of one-way valve 82, the refrigerant cannot flow to the upper part, but only flows to the lower part of the outdoor fin heat exchanger 3, where the system can open or close the outdoor fan according to the temperature and state to condense or supercool the refrigerant, the liquid refrigerant passes through one-way valve 84, and is limited to flow into throttling capillary 42 by one-way valve 85, becomes low-pressure gas-liquid mixture after throttling, enters the heat exchanger 5 of indoor wall-mounted machine or cabinet machine to evaporate, reduces the circulating air of target room, and returns to compressor 1 (return air port) through angle valve-gas 74 (full opening), completes a single refrigeration cycle process; the second auxiliary circuit: compressor 1 (return air port) and switching four-way valve 2 (C port and S port are connected) are communicated, and are connected with the lower part of the outdoor fin heat exchanger 3, because of the common direction restriction of one-way valve 82 and one-way valve 85, the high-pressure refrigerant of the main circuit cannot enter the auxiliary circuit. At this time, the auxiliary circuit is communicated with the return air port of the compressor, is in the low-pressure side of the system, when flowing to the upper part of the outdoor fin heat exchanger 3 at different outdoor temperatures, the refrigerant participating in system operation can be dynamically adjusted according to the different pressure changes and different refrigerant storage conditions, the refrigerant balance is maintained, and the system operation is stable.

[0036] As Figure 4 and Figure 5 shown, the embodiment provides a switching four-way valve working state process schematic diagram, when the switching four-way valve is not powered, the system is in ordinary air conditioner refrigeration circuit (refrigerant balance), the first valve port (D) of the switching four-way valve is communicated with the fourth valve port (C), the second valve port (E) is communicated with the third valve port (S); when the switching four-way valve is powered, the system is in water heating system + air conditioner refrigeration circuit (refrigerant balance), the piston moves to the right, so that the first valve port (D) of the switching four-way valve 2 is communicated with the second valve port (E), the third valve port (S) is communicated with the fourth valve port (C). The first valve port (D) is always connected with the exhaust of the compressor and is in high temperature and high pressure state, and the third valve port (S) is always connected with the return air of the compressor and is in low temperature and low pressure state.

[0037] Combined Figure 1The embodiment of the present application provides the circuit configured by the present application and has the functions of recycling refrigerant and balancing the refrigerant distribution of the system. The application scenario 1: when the unit needs to be disassembled to different places, in order to facilitate the work, the refrigerant increase and decrease need not to be worried, the system only needs to be in the ordinary air conditioning refrigeration circuit, and the opening of the angle valve-liquid is closed, the refrigerant of the whole system can return to the compressor and other components of the system, then the angle valve-gas, the angle valve 1 and the angle valve 2 are closed, and finally the system is stopped, and other components can be disassembled. The application scenario 2: when the unit increases with the running time, the system exhaust is still in a high temperature state, in order to adjust the possible refrigerant and refrigeration oil accumulation in the heat water heat exchanger, the system only needs to be in the ordinary air conditioning refrigeration circuit, the opening of the angle valve-liquid is closed, the low pressure side of the system is reduced to a certain extent, the excess refrigerant and refrigeration oil of the heat water heat exchanger can return to the compressor, then the opening of the angle valve-liquid is slowly opened, because the throttle valve B and the one-way valve 3 have the flow limiting effect and the gas passing characteristics in the low pressure side, most of the excess refrigerant and refrigeration oil participate in the normal air conditioning refrigeration cycle, and the system returns to the balanced working condition.

[0038] Finally, it needs to be explained that the present application is described in detail above, the description of the embodiment is only used to help understand the method of the present application and the core idea, and cannot limit the protection scope of the present application, and equivalent replacement or modification according to the spirit and essence of the present application should be covered in the protection scope of the present application.

Claims

1. A dynamic condensing air conditioning hot water system, characterized in that, include: Compressor (1), switching four-way valve (2), segmented outdoor finned heat exchanger (3), heat exchanger of indoor wall-mounted or cabinet air conditioner (5), domestic hot water tank (6), outdoor fan (9); The switching four-way valve (2) includes valve ports D, E, C and S. Valve port D is connected to the compressor exhaust port, valve port E is connected to the domestic hot water tank (6), valve port C is connected to the segmented outdoor finned heat exchanger (3), and valve port S is connected to the compressor intake port. The switching four-way valve (2) is used to switch the compressor exhaust flow to the segmented outdoor finned heat exchanger (3) or the domestic hot water tank (6) for heat exchange. A first capillary tube (41) and a first check valve (81) connected in parallel with the first capillary tube (41) and controlling the flow direction toward the domestic hot water tank (6) are also provided on the pipeline between the domestic hot water tank (6) and the E valve port. The segmented outdoor finned heat exchanger (3) is divided into upper and lower parts. The upper part of the outdoor finned heat exchanger accounts for two-thirds of the total heat exchange area, and the lower part of the outdoor finned heat exchanger accounts for one-third of the total heat exchange area. A second check valve (82) and a third check valve (83) are connected in parallel to the first port of the lower part of the outdoor finned heat exchanger. One end of the second check valve (82) and one end of the third check valve (83) are connected to form a confluence point that controls the flow direction toward the first port of the lower part of the outdoor finned heat exchanger. The first port of the upper part of the outdoor finned heat exchanger is simultaneously connected to the C valve port and the other end of the second check valve (82). The domestic hot water tank (6) is connected to the other end of the third check valve (83). The second port of the lower part of the outdoor finned heat exchanger is connected to one end of the fourth check valve (84), and the second port of the upper part of the outdoor finned heat exchanger is connected to one end of the fifth check valve (85). The other ends of the fourth check valve (84) and the fifth check valve (85) are joined together and connected to the second capillary tube (42). The second capillary tube (42) is connected to the heat exchanger (5) of the indoor wall-mounted unit or cabinet unit and the air intake of the compressor (1) in sequence. It also includes the first to fourth angle valves (71-74), the first angle valve (71) and the second angle valve (72) are connected to the domestic hot water tank (6) and form a circuit, and the third angle valve (73) and the fourth angle valve (74) are connected to the heat exchanger (5) of the indoor wall-mounted unit or cabinet unit and form a circuit.

2. The dynamic condensing air conditioning hot water system according to claim 1, characterized in that: This includes standard air conditioning cooling mode, hot water production + air conditioning cooling mode, and refrigerant recovery mode; The normal air conditioning cooling mode switches the connection between the four-way valve D port and the C port, and the connection between the E port and the S port. The hot water production + air conditioning cooling circuit mode switches the connection between the four-way valve D port and the E port, and the connection between the C port and the S port. In the refrigerant recovery mode, the connection between the D and C ports of the four-way valve is switched, the third angle valve closes first and the fourth angle valve closes last; the connection between the E and S ports of the four-way valve is switched, the first angle valve closes last and the second angle valve closes first.

3. The dynamic condensing air conditioning hot water system according to claim 1, characterized in that, When the air conditioner is in normal cooling mode, the entire heat exchange area of ​​the segmented outdoor finned heat exchanger is used as a normal air-cooled condenser. When hot water production + air conditioning cooling mode is used, the lower part of the outdoor finned heat exchanger operates as a subcooling condenser or liquid receiver. If the outlet of the domestic hot water tank is liquid refrigerant, the lower part of the outdoor finned heat exchanger operates as a liquid receiver and the outdoor fan does not work. If the outlet of the domestic hot water tank is gas-liquid mixed refrigerant, the lower part of the outdoor finned heat exchanger operates as a subcooling condenser and the outdoor fan works.

4. The dynamic condensing air conditioning hot water system according to claim 1, characterized in that, When switching between hot water production and air conditioning cooling modes, and the system returns to normal air conditioning cooling mode, the domestic hot water tank, the first capillary tube, and the first one-way valve form a device to buffer the pressure difference and balance the refrigerant. The high-temperature and high-pressure refrigerant stored in the domestic hot water tank uses its own pressure difference to throttle and regulate the pressure through the first capillary tube, so that the refrigerant returns to the low-pressure side of the compressor and participates in the circulation.

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