Air conditioner hot water integrated system with temperature control dehumidification function and control method thereof

Abstract

The application provides an air conditioner and hot water integrated system with temperature control and dehumidification functions and a control method thereof. The integrated system comprises a compressor, an outdoor heat exchanger, first and second indoor heat exchangers, a water tank and a liquid storage device. The exhaust end of the compressor is connected to one end of the outdoor heat exchanger, one end of the indoor heat exchanger or one end of the water tank. The other end of the second indoor heat exchanger is connected to one end of the first indoor heat exchanger. The other end of the outdoor heat exchanger, the other end of the first indoor heat exchanger and the other end of the water tank are all connected to the inside of the liquid storage device. The suction end of the compressor is connected to one end of the outdoor heat exchanger or one end of the second indoor heat exchanger. According to the application, the modes of refrigeration + hot water, heating + hot water and dehumidification + hot water can be realized simultaneously. The application can also adapt to the refrigerant circulation amount in different modes, solve the problems of high power consumption and unsatisfied comfort level, and realize efficient operation of the system.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically to an integrated air conditioning and hot water system with temperature control and dehumidification functions, and its control method. Background Technology

[0002] Residential inverter air conditioners are now widely used in my country, serving as both cooling and dehumidifiers in summer and heating in winter. To meet dehumidification requirements, the evaporation temperature of the air conditioner is typically lower than the return air dew point temperature; however, to meet comfort requirements, the return air temperature should not be too low. When a residential inverter air conditioner is running under low load cooling, the evaporation temperature is usually higher. To maintain dehumidification, the indoor unit's airflow needs to be reduced to lower the evaporation temperature, thus achieving the purpose of dehumidification. In this case, both the cooling efficiency ratio and the dehumidification capacity per unit energy consumption are reduced.

[0003] In the middle and lower reaches of the Yangtze River and areas south of it, relative humidity is high during the transitional season (when air conditioning is not needed for cooling or heating), especially during the "plum rain season" and the "return to spring" period. Dehumidification is necessary to address the comfort and health issues caused by dampness. When conventional household inverter air conditioners are cooling and dehumidifying during the transitional season, the indoor return air temperature and dew point gradually decrease, and the indoor relative humidity stops decreasing or even increases after reaching a certain level, resulting in a cool but not dry indoor environment. Furthermore, the decrease in evaporation temperature and return air dew point significantly reduces the dehumidification capacity per unit of energy consumed by the air conditioner. Therefore, during humid weather in the transitional season, conventional household inverter air conditioners cannot meet the comfort requirements for dehumidification and are usually idle.

[0004] Summer cooling periods and the transitional season's humid weather periods are both relatively long, resulting in high demands for cooling and dehumidification. Conventional air conditioning systems, when operating in cooling and temperature / dehumidification modes, need to release heat outdoors. Recovering this heat as hot water can meet the household's hot water needs.

[0005] However, existing household inverter air conditioners cannot simultaneously achieve cooling + hot water production, heating + hot water production, or dehumidification + hot water production modes, nor can they adjust the required refrigerant charge according to the cooling capacity needs of different modes. This results in high power consumption or failure to meet comfort requirements, thus hindering the efficient operation of the air conditioner.

[0006] Because existing household inverter air conditioners cannot simultaneously achieve cooling + hot water production, heating + hot water production, and dehumidification + hot water production modes, and cannot adjust the required refrigerant charge according to the cooling capacity requirements of different modes, resulting in high power consumption or failure to meet comfort requirements, this invention researches and designs an integrated air conditioning and hot water system with temperature control and dehumidification functions and its control method. Summary of the Invention

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects of existing household inverter air conditioners that cannot simultaneously realize the modes of cooling + hot water production, heating + hot water production, and dehumidification + hot water production, and cannot adjust the required refrigerant charge according to the cooling capacity requirements of different modes, resulting in high power consumption or failure to meet the comfort requirements. Thus, the present invention provides an integrated air conditioning and hot water system with temperature control and dehumidification functions and its control method.

[0008] To address the above problems, the present invention provides an integrated air conditioning and hot water system with temperature control and dehumidification functions, comprising:

[0009] The system comprises a compressor, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a water tank, and a liquid storage device. The discharge end of the compressor is connected to one end of the outdoor heat exchanger, or to one end of the second indoor heat exchanger, or to one end of the water tank. The other end of the outdoor heat exchanger is connected to the interior of the liquid storage device. The other end of the second indoor heat exchanger is connected to one end of the first indoor heat exchanger. The other end of the first indoor heat exchanger is connected to the interior of the liquid storage device. The other end of the water tank is connected to the interior of the liquid storage device. The suction end of the compressor is connected to one end of the outdoor heat exchanger or to one end of the second indoor heat exchanger.

[0010] In some implementations...

[0011] It also includes a four-way valve, which comprises a first D-end, a first E-end, a first S-end, and a first C-end. The four-way valve can switch between two connection states: In the first state, the first D-end is connected to the first C-end, and simultaneously the first E-end is connected to the first S-end; in the second state, the first D-end is connected to the first E-end, and simultaneously the first C-end is connected to the first S-end.

[0012] The first D end is connected to the discharge end of the compressor through a first pipeline, the first E end is connected to one end of the second indoor heat exchanger through a second pipeline, the first S end is connected to the suction end of the compressor through a third pipeline, and the first C end is connected to one end of the outdoor heat exchanger through a fourth pipeline.

[0013] In some implementations...

[0014] The other end of the outdoor heat exchanger is connected to the interior of the liquid storage device through the fifth pipe, the other end of the first indoor heat exchanger is connected to the interior of the liquid storage device through the sixth pipe, and the other end of the water tank is connected to the interior of the liquid storage device through the seventh pipe.

[0015] In some implementations...

[0016] A first throttling device is provided on the fifth pipeline, a second throttling device is provided on the sixth pipeline, and a third throttling device is provided on the seventh pipeline. The first indoor heat exchanger and the second indoor heat exchanger are connected in series, and a fourth throttling device is also provided between them.

[0017] In some implementations...

[0018] The fifth pipe connects to the inside of the liquid storage device at one end, which is the first end. The first end is higher than the inner bottom surface of the liquid storage device by a first height. The sixth pipe connects to the inside of the liquid storage device at one end, which is the second end. The second end is higher than the inner bottom surface of the liquid storage device by a second height. The seventh pipe connects to the inside of the liquid storage device at one end, which is the third end. The third end is higher than the inner bottom surface of the liquid storage device by a third height. The distance between the first end and the top of the liquid storage device is a fourth height, and the fourth height is greater than the first height. The distance between the second end and the top of the liquid storage device is a fifth height, and the fifth height is greater than the second height. The distance between the third end and the top of the liquid storage device is a sixth height, and the sixth height is greater than the third height.

[0019] In some implementations...

[0020] The liquid storage device has a middle height dividing line at half its height. The distance from the first end to the middle height dividing line is the seventh height, and the seventh height is greater than the first height. The distance from the second end to the middle height dividing line is the eighth height, and the eighth height is greater than the second height. The distance from the third end to the middle height dividing line is the ninth height, and the ninth height is greater than the third height.

[0021] In some implementations...

[0022] One end of the water tank is connected to the exhaust end of the compressor through an eighth pipe. The eighth pipe contacts the water tank through a refrigerant pipe and exchanges heat with the water in the water tank. One end of the water tank is one end of the refrigerant pipe, and the other end of the water tank is the other end of the refrigerant pipe. The other end of the refrigerant pipe is connected to the seventh pipe. The refrigerant pipe forms at least a part of the structure of the water tank heat exchanger.

[0023] It also includes an indoor fan and an outdoor fan, the outdoor fan being opposite to the outdoor heat exchanger to drive airflow to exchange heat with the refrigerant in the outdoor heat exchanger, the indoor fan being opposite to at least a portion of the structure of the first indoor heat exchanger, and the indoor fan also being opposite to at least a portion of the structure of the second indoor heat exchanger to drive airflow to exchange heat with the refrigerant in the first indoor heat exchanger and the second indoor heat exchanger.

[0024] In some implementations...

[0025] It also includes an auxiliary compression cylinder, a ninth pipeline, and a tenth pipeline. The intake end of the auxiliary compression cylinder is connected to the upper interior of the liquid storage device through the ninth pipeline, and the exhaust end of the auxiliary compression cylinder is connected to the first pipeline through the tenth pipeline.

[0026] In some implementations...

[0027] The first indoor heat exchanger, the second indoor heat exchanger, the second throttling device, and the fourth throttling device constitute at least a portion of the structure of a set of indoor unit units, wherein there are multiple indoor unit units, and the multiple indoor unit units are connected in parallel to each other.

[0028] The present invention also provides a control method for an integrated air conditioning and hot water system with temperature control and dehumidification function as described above, wherein: when the integrated air conditioning and hot water system with temperature control and dehumidification function simultaneously includes a four-way valve and a first throttling device, a second throttling device, a third throttling device, and a fourth throttling device, the control method includes:

[0029] Testing steps, and the required operating modes of the testing system;

[0030] The judgment step is to determine which of the following operating modes is required: cooling mode, heating mode, dehumidification mode, cooling + hot water mode, heating + hot water mode, dehumidification + hot water mode, and defrosting mode;

[0031] The control steps involve controlling the switching of the four-way valve according to the requirements of different operating modes, as well as controlling the on / off state of the first throttling device, the second throttling device, the third throttling device, and the fourth throttling device, and adjusting the opening degree.

[0032] In some implementations...

[0033] The control steps include: when the required operating mode of the system is cooling mode, controlling the four-way valve to connect the first D end with the first C end and the first E end with the first S end, controlling the third throttling device to close, controlling the first throttling device and the second throttling device to open and controlling the opening degree of the two to change, and the fourth throttling device to be fully open.

[0034] When the required operating mode of the system is heating mode, the four-way valve is controlled to connect the first D end with the first E end, and at the same time, the first C end with the first S end. The third throttling device is controlled to close, the first throttling device and the second throttling device are controlled to open and their opening degrees are controlled to change. The fourth throttling device is fully open.

[0035] When the required operating mode of the system is temperature control and dehumidification, the four-way valve is controlled to connect the first D end with the first C end and the first E end with the first S end, and the third throttling device is controlled to close, the first throttling device and the second throttling device are controlled to be fully open, and the fourth throttling device is opened and its opening degree is controlled to change.

[0036] When the required operating mode of the system is cooling + hot water mode, the four-way valve is controlled to connect the first D end with the first C end, and at the same time the first E end with the first S end. The first throttling device and the third throttling device are both opened to adjust the liquid level in the liquid storage device. The second throttling device is opened and its opening degree is controlled to change. The fourth throttling device is fully open.

[0037] When the required operating mode of the system is heating + hot water production mode, the four-way valve is controlled to connect the first D end with the first E end, and at the same time, the first C end with the first S end. The second and third throttling devices are both controlled to open to adjust the liquid level in the storage device. The first throttling device is opened and its opening degree is controlled to change. The fourth throttling device is fully open.

[0038] In some implementations...

[0039] When the required operating mode of the system is temperature control and dehumidification + hot water production mode

[0040] Controlling the four-way valve connects the first D end to the first C end, and simultaneously connects the first E end to the first S end;

[0041] The detection step also includes detecting the water temperature in the water tank;

[0042] When the water temperature is less than the first preset value, the system controls the water tank to operate in the indoor dehumidification mode, controls the first throttling device to close, controls the third throttling device and the second throttling device to open to adjust the liquid level in the storage device, and controls the fourth throttling device to open and change its opening degree.

[0043] When the water temperature is greater than or equal to the first preset value, the outdoor heat exchanger is controlled to operate in the mode of indoor dehumidification. The third throttling device is controlled to close, and the first and second throttling devices are controlled to open to adjust the liquid level in the liquid storage device. The fourth throttling device is controlled to open and its opening degree is varied.

[0044] In some implementations...

[0045] The judgment step, after determining that it is neither a cooling mode nor a heating mode, then determines whether it is a single hot water mode.

[0046] In the control steps, if it is a single hot water mode, the four-way valve is controlled to connect the first D end with the first E end and the first C end with the first S end, and the second throttling device is controlled to close, and the first throttling device and the third throttling device are controlled to open and their opening degrees are controlled to change.

[0047] The judgment step, after determining that it is neither a cooling mode, nor a heating mode, nor a single hot water mode, then determines whether it is a defrosting mode.

[0048] If it is in defrost mode, control the execution of defrost operation mode, control the four-way valve to connect the first D end with the first C end, and at the same time connect the first E end with the first S end, and control the third throttling device to close, control the first throttling device and the second throttling device to open and control the opening degree of the two to change.

[0049] In the judgment step, if it is determined that the system is neither in cooling mode, nor heating mode, nor hot water mode, nor defrosting mode, the control step controls the integrated air conditioning and hot water system with temperature control and dehumidification functions to shut down.

[0050] The integrated air conditioning and hot water system with temperature control and dehumidification functions and its control method provided by this invention have the following beneficial effects:

[0051] This invention, by incorporating a compressor, an outdoor heat exchanger, first and second indoor heat exchangers, a water tank, and a liquid storage device, along with the specific connection method described above, integrates the water tank into a conventional air conditioning system, organically combining a heat pump water heater and an air conditioning system. This allows for multiple operating modes, including cooling, heating, dehumidification, hot water supply, simultaneous cooling and hot water supply, simultaneous heating and hot water supply, dehumidification + hot water production, and defrosting. Specifically, it can simultaneously achieve cooling + hot water production, heating + hot water production, and dehumidification + hot water production modes. By incorporating a liquid storage device and connecting the other ends of the outdoor heat exchanger, the indoor heat exchanger, and the water tank to the interior of the liquid storage device, the invention can adaptively adjust the refrigerant circulation volume entering the system. Since the refrigerant circulation volume differs under various operating modes, the aforementioned connection method of the liquid storage device... This invention can adapt to different refrigerant circulation volumes under different modes, solving the problem of high power consumption caused by a small required refrigerant flow rate but a large actual circulation flow rate, and the problem of insufficient comfort requirements caused by a large required refrigerant flow rate but a small actual circulation flow rate, thus achieving efficient system operation. This invention allows for the sharing or partial sharing of the same heat exchanger and piping system across multiple operating modes. Compared to simultaneously installing air conditioning and heat pump water heaters, this saves initial investment and operating costs, and improves the overall system efficiency. Furthermore, the air conditioning system of this invention can use the condensation heat generated by the refrigeration system to heat water (refrigeration + hot water production mode) when operating simultaneously for cooling and hot water supply, and can use the indoor heat absorbed by dehumidification to produce hot water (dehumidification + hot water production mode). This reduces the system's heat emissions into the environment, lowers thermal pollution, and improves system energy efficiency. Attached Figure Description

[0052] Figure 1 This is a flow path structure diagram of the air conditioning and hot water integrated system with temperature control and dehumidification functions of the present invention in cooling & defrosting mode;

[0053] Figure 2 This is a flow path structure diagram of the air conditioning and hot water integrated system with temperature control and dehumidification function of the present invention in heating mode;

[0054] Figure 3 This is a flow path structure diagram of the integrated air conditioning and hot water system with temperature control and dehumidification function of the present invention in the temperature control and dehumidification mode;

[0055] Figure 4 This is a flow path structure diagram of the integrated air conditioning and hot water system with temperature control and dehumidification functions of the present invention in single hot water mode;

[0056] Figure 5 This is a flow path structure diagram of the air conditioning and hot water integrated system with temperature control and dehumidification functions of the present invention in the cooling + hot water production mode;

[0057] Figure 6This is a flow path structure diagram of the air conditioning and hot water integrated system with temperature control and dehumidification function of the present invention in the temperature control and dehumidification + hot water production mode;

[0058] Figure 7 This is a flow path structure diagram of the air conditioning and hot water integrated system with temperature control and dehumidification functions of the present invention in the heating + hot water mode;

[0059] Figure 8 This is a system structure diagram of an alternative embodiment 1 of the air conditioning and hot water integrated system with temperature control and dehumidification functions of the present invention;

[0060] Figure 9 This is a system structure diagram of an alternative embodiment 2 of the air conditioning and hot water integrated system with temperature control and dehumidification functions of the present invention.

[0061] The reference numerals in the attached figures are as follows:

[0062] 1. Compressor; 12. Auxiliary compression cylinder; 21. Four-way valve; C. First C end; D. First D end; E. First E end; S. First S end; 3. Outdoor heat exchanger; 41. First indoor heat exchanger; 42. Second indoor heat exchanger; 51. First throttling device; 52. Second throttling device; 53. Third throttling device; 54. Fourth throttling device; 6. Liquid storage device; 71. Outdoor fan; 72. Indoor fan; 8. Water tank; 81. Water tank inlet; 82. Water tank outlet; 83. Water tank heat exchanger; 101. First pipeline; 102. Second pipeline; 103. Third pipeline; 104. Fourth pipeline; 105. Fifth pipeline; 106. Sixth pipeline; 107. Seventh pipeline; 108. Eighth pipeline; 109. Ninth pipeline; 110. Tenth pipeline. Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0066] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0067] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0068] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0069] like Figure 1-9 As shown, the present invention provides an integrated air conditioning and hot water system with temperature control and dehumidification functions, comprising:

[0070] The system comprises a compressor 1, an outdoor heat exchanger 3, a first indoor heat exchanger 41, a second indoor heat exchanger 42, a water tank 8, and a liquid storage device 6 (liquid storage tank). The discharge end of the compressor 1 can be connected to one end of the outdoor heat exchanger 3, one end of the second indoor heat exchanger 42, or one end of the water tank 8. The other end of the outdoor heat exchanger 3 is connected to the interior of the liquid storage device 6. The other end of the second indoor heat exchanger 42 is connected to one end of the first indoor heat exchanger 41. The other end of the first indoor heat exchanger 41 is connected to the interior of the liquid storage device 6. The other end of the water tank 8 is connected to the interior of the liquid storage device 6. The suction end of the compressor 1 can be connected to one end of the outdoor heat exchanger 3 or one end of the second indoor heat exchanger 42.

[0071] This invention, by incorporating a compressor, an outdoor heat exchanger, first and second indoor heat exchangers, a water tank, and a liquid storage device, along with the specific connection method described above, integrates the water tank into the air conditioning system, organically combining a heat pump water heater and an air conditioning system. This allows for multiple operating modes, including cooling, heating, dehumidification, hot water supply, simultaneous cooling and hot water supply, simultaneous heating and hot water supply, dehumidification + hot water production, and defrosting. Specifically, it can simultaneously achieve cooling + hot water production, heating + hot water production, and dehumidification + hot water production modes. By incorporating a liquid storage device and connecting the other ends of the outdoor heat exchanger, the indoor heat exchanger, and the water tank to the inside of the liquid storage device, the invention can adaptively adjust the refrigerant circulation rate entering the system. Since the refrigerant circulation rate differs under various operating modes, the aforementioned connection method of the liquid storage device can adaptively adjust the refrigerant circulation rate under different modes, thus solving the problem of the required refrigerant flow rate. This invention addresses the issues of high power consumption caused by a small refrigerant flow rate but a large actual circulation flow rate, and the inability to meet comfort requirements due to a large required refrigerant flow rate but a small actual circulation flow rate, thus achieving efficient system operation. The invention allows for the sharing or partial sharing of the same heat exchanger and piping system across multiple operating modes. Compared to simultaneously installing an air conditioner and a heat pump water heater, this saves initial investment and operating costs, and improves the overall system efficiency. Furthermore, the air conditioning system can utilize the condensation heat generated by the refrigeration system to heat water (refrigeration + hot water production mode) and can use the indoor heat absorbed during dehumidification to produce hot water (dehumidification + hot water production mode), reducing heat emissions into the environment, lowering thermal pollution, and improving system energy efficiency. Additionally, the outdoor heat exchanger absorbs heat from the water in the tank during defrosting, which can be used for defrosting, shortening defrosting time, reducing indoor temperature fluctuations, and improving user comfort.

[0072] To address the issues of high energy consumption for cooling and dehumidification during low-load operation of conventional household inverter air conditioners in summer and low comfort levels during humid transitional seasons, and to recover waste heat emitted from the outside during cooling operation to meet the demand for domestic hot water, this invention provides an air conditioning water heater system with temperature control and dehumidification functions, which can simultaneously meet the functions of cooling, heating, temperature control and dehumidification, and hot water production.

[0073] This invention can solve the following technical problems:

[0074] 1. Solve the problem of low comfort and high energy consumption caused by the excessively low outlet air temperature and evaporation temperature when conventional inverter air conditioners are dehumidified during the transition season in humid regions;

[0075] 2. Solve the problem of heat waste caused by air conditioners releasing heat outdoors during cooling, temperature control, and dehumidification operations;

[0076] 3. Resolve the issue of refrigerant charge mismatch during multi-mode operation;

[0077] 4. An air conditioning system can perform conventional cooling and heating functions, as well as temperature control, dehumidification, and water heater functions, thereby reducing equipment costs and downtime.

[0078] This invention proposes an air conditioning and hot water combined supply system that collects the condensation heat emitted into the environment during air conditioning operation and uses it to heat hot water or other heating equipment. It can realize multiple functions such as cooling, heating, and hot water supply, saving initial investment and operating costs of equipment, improving the overall efficiency of the system, and reducing the heat emitted into the environment, thus reducing thermal pollution.

[0079] In some implementations...

[0080] It also includes a four-way valve 21 (four-way directional valve), which includes a first D-end (D), a first E-end (E), a first S-end (S), and a first C-end (C). The four-way valve 21 can switch between the following two connection states: In the first state, the first D-end (D) is connected to the first C-end (C), and the first E-end (E) is connected to the first S-end (S); In the second state, the first D-end (D) is connected to the first E-end (E), and the first C-end (C) is connected to the first S-end (S).

[0081] The first D end D is connected to the exhaust end of the compressor 1 through the first pipe 101, the first E end E is connected to one end of the second indoor heat exchanger 42 through the second pipe 102, the first S end S is connected to the suction end of the compressor 1 through the third pipe 103, and the first C end C is connected to one end of the outdoor heat exchanger 3 through the fourth pipe 104.

[0082] This is the preferred structural form of the present invention. The four-way valve can effectively switch modes, especially the connection position between the first and second indoor heat exchangers and the outdoor heat exchanger, to achieve switching between cooling, heating and dehumidification, as well as switching between cooling + hot water, heating + hot water and dehumidification + hot water.

[0083] The air conditioner of the present invention also has a main four-way valve (four-way valve 21) for switching between different operating modes. The D pipe (first D end) of the four-way valve is connected to the exhaust port of the compressor 1, the S pipe (first S end) is connected to the suction port of the compressor, the E pipe (first E end) is connected to the second indoor heat exchanger 42, and the C pipe (first C end) is connected to the outdoor heat exchanger 3.

[0084] In some implementations...

[0085] The other end of the outdoor heat exchanger 3 is connected to the interior of the liquid storage device 6 through the fifth pipe 105, the other end of the first indoor heat exchanger 41 is connected to the interior of the liquid storage device 6 through the sixth pipe 106, and the other end of the water tank 8 is connected to the interior of the liquid storage device 6 through the seventh pipe 107.

[0086] In a further preferred embodiment, the other end of the outdoor heat exchanger is connected to the interior of the liquid storage device via a fifth pipe, the other end of the first indoor heat exchanger is connected to the interior of the liquid storage device via a sixth pipe, and the other end of the water tank is connected to the interior of the liquid storage device via a seventh pipe. This allows the liquid storage device to transport different amounts of refrigerant liquid inside the device to the outdoor heat exchanger via the fifth pipe, to the first indoor heat exchanger via the sixth pipe, and to the water tank via the seventh pipe under different operating modes. This enables the refrigerant circulation volume to adapt to different modes, and by adjusting the liquid level in the liquid storage device, the refrigerant circulation volume can be adapted to different modes, thus solving the problem of mismatch in the optimal refrigerant charge volume under different functional operating modes.

[0087] When the system requires a large amount of refrigerant to circulate, the liquid level in the receiver is adjusted to allow more refrigerant to be released into the circulation, causing the liquid level in the receiver to drop. When the system requires a small amount of refrigerant to circulate, the liquid level in the receiver is adjusted to allow less refrigerant to be released into the circulation, causing the liquid level in the receiver to rise.

[0088] In some implementations...

[0089] The fifth pipeline 105 is provided with a first throttling device 51, the sixth pipeline 106 is provided with a second throttling device 52, the seventh pipeline 107 is provided with a third throttling device 53, the first indoor heat exchanger 41 and the second indoor heat exchanger 42 are connected in series, and a fourth throttling device 54 is also provided between them.

[0090] This invention also utilizes a first throttling device on the fifth pipeline to regulate or shut off the refrigerant flow through or out of the outdoor heat exchanger, thereby effectively controlling the refrigerant flow through the outdoor heat exchanger. A second throttling device on the sixth pipeline can regulate or shut off the refrigerant flow through or out of the indoor heat exchanger, thus effectively controlling the refrigerant flow through the indoor heat exchanger. A third throttling device on the seventh pipeline can regulate or shut off the refrigerant flow through or out of the water tank, thus effectively controlling the refrigerant flow through the water tank, to meet the refrigerant flow requirements of the indoor and outdoor heat exchangers and the water tank under different operating modes. A fourth throttling device can be opened and adjusted to throttle the refrigerant flow when dehumidification is needed, satisfying the functions and effects of dehumidification and dehumidification + hot water production.

[0091] The water tank heat exchanger 83 in the air conditioning system water tank 8 of the present invention forms a series or parallel relationship with the outdoor heat exchanger 3, the first indoor heat exchanger 41 and the second indoor heat exchanger 42 through different combinations of the four-way valve 21 and the first throttling device 51, the second throttling device 52, the third throttling device 53 and the fourth throttling device 54. It can realize multiple operating modes such as cooling, heating, dehumidification, hot water production, cooling + hot water production, heating + hot water production, dehumidification + hot water production and defrosting to meet different user needs.

[0092] In the air conditioning system of the present invention, the first throttling device 51 is preferably connected in series between the outdoor heat exchanger 3 and the liquid storage device 6, the second throttling device 52 is preferably connected in series between the liquid storage device 6 and the first indoor heat exchanger 41, and the third throttling device 53 is connected in series between the liquid storage device 6 and the water tank 8. The first throttling device 51, the second throttling device 52, and the third throttling device 53 are all valve-closed throttling devices with no flow. When the system needs to switch operating modes, closing this throttling device can cut off the refrigerant operation in this section of the pipeline.

[0093] The air conditioning and hot water system of this invention controls the switching of a four-way valve and multiple throttling devices by detecting the activation status of the system's operating mode, thereby activating different operating modes; and by detecting the water temperature in the water tank and comparing it with the set temperature, it activates different dehumidification operating modes (the dehumidification + hot water production mode can utilize the heat from indoor dehumidification to produce hot water, effectively utilizing energy consumption and improving energy efficiency); the air conditioning and hot water integrated system of this invention with temperature control and dehumidification functions preferably uses environmentally friendly and efficient refrigerants such as R32 and R290.

[0094] In some implementations...

[0095] The fifth pipe 105 is connected to the interior of the liquid storage device 6 at one end, which is a first end. The first end is higher than the inner bottom surface of the liquid storage device 6 by a first height. The sixth pipe 106 is connected to the interior of the liquid storage device 6 at one end, which is a second end. The second end is higher than the inner bottom surface of the liquid storage device 6 by a second height. The seventh pipe 107 is connected to the interior of the liquid storage device 6 at one end, which is a third end. The third end is higher than the inner bottom surface of the liquid storage device 6 by a third height. The distance between the first end and the top of the liquid storage device 6 is a fourth height, and the fourth height is greater than the first height. The distance between the second end and the top of the liquid storage device 6 is a fifth height, and the fifth height is greater than the second height. The distance between the third end and the top of the liquid storage device 6 is a sixth height, and the sixth height is greater than the third height.

[0096] This is a further preferred structural form of the air conditioning and hot water integrated system with temperature control and dehumidification functions of the present invention. Specifically, the insertion height of the fifth, sixth, and seventh pipes into the liquid storage device is all located at the lower end, which can effectively draw refrigerant from the refrigerant liquid at the bottom of the liquid storage device and enter the corresponding heat exchanger for heat exchange. It can adaptively adjust the flow rate of refrigerant circulating in the system under different operating modes. By adjusting the liquid level of the liquid storage device, it can adapt to the refrigerant circulation volume under different modes, thus solving the problem of mismatch in the optimal refrigerant charge volume of the system under different functional operating modes.

[0097] In some implementations...

[0098] The liquid storage device 6 has a middle height dividing line at half its height. The distance from the first end to the middle height dividing line is the seventh height, and the seventh height is greater than the first height. The distance from the second end to the middle height dividing line is the eighth height, and the eighth height is greater than the second height. The distance from the third end to the middle height dividing line is the ninth height, and the ninth height is greater than the third height.

[0099] This is a further preferred structural form of the air conditioning and hot water integrated system with temperature control and dehumidification functions of the present invention. Specifically, the insertion height of the fifth, sixth, and seventh pipes into the liquid storage device is all located at the lower end of the middle height dividing line. This allows for further absorption of refrigerant from the refrigerant liquid at the bottom of the liquid storage device and its entry into the corresponding heat exchanger for heat exchange. It can adaptively adjust the flow rate of refrigerant circulating in the system under different operating modes. By adjusting the liquid level of the liquid storage device, it can adaptively adjust the refrigerant circulation volume under different modes, thus solving the problem of mismatch in the optimal refrigerant charge volume of the system under different functional operating modes.

[0100] The air conditioner of the present invention also has a refrigerant charge adjustment device (i.e., liquid storage device), which is connected to the first throttling device 51, the second throttling device 52 and the third throttling device 53 respectively, and the pipes connected to the charge adjustment device are inserted into a position close to the bottom to ensure that the refrigerant leaving the liquid storage device is in a liquid state, so as to achieve the purpose of liquid level adjustment in the liquid storage device.

[0101] In some implementations...

[0102] One end of the water tank 8 is connected to the exhaust end of the compressor 1 through the eighth pipe 108. The eighth pipe 108 contacts the water tank 8 through the refrigerant pipe and exchanges heat with the water in the water tank 8. One end of the water tank 8 is one end of the refrigerant pipe, and the other end of the water tank 8 is the other end of the refrigerant pipe. The other end of the refrigerant pipe is connected to the seventh pipe 107. The refrigerant pipe forms at least a part of the structure of the water tank heat exchanger 83.

[0103] It also includes an indoor fan 72 and an outdoor fan 71. The outdoor fan 71 is opposite to the outdoor heat exchanger 3 so as to drive airflow to exchange heat with the refrigerant in the outdoor heat exchanger 3. The indoor fan 72 is opposite to at least a portion of the structure of the first indoor heat exchanger 41 and also opposite to at least a portion of the structure of the second indoor heat exchanger 42 so as to drive airflow to exchange heat with the refrigerant in the first indoor heat exchanger 41 and the second indoor heat exchanger 42.

[0104] This invention connects one end of the water tank to the exhaust end of the compressor via the eighth pipeline. When hot water is needed, the high-temperature and high-pressure refrigerant can be used to heat the water in the water tank by opening the third throttling device to produce hot water at the required temperature. The fourth throttling device can be opened and throttled to achieve the functions and effects of indoor dehumidification and dehumidification + hot water production.

[0105] The air conditioner of the present invention also has a main four-way reversing valve (four-way valve 21) for switching between different operating modes. The D pipe of the main four-way reversing valve is connected to the exhaust port of the compressor 1, the S pipe is connected to the suction port of the compressor, the E pipe is connected to the second indoor heat exchanger 42, and the C pipe is connected to the outdoor heat exchanger 3.

[0106] 1. The air-conditioning water heater of the present invention comprises a compressor 1, an outdoor heat exchanger 3, a first indoor heat exchanger 41, a second indoor heat exchanger 42, an outdoor fan 71, and an indoor fan 72. The first and second indoor heat exchangers are arranged in series along the refrigerant flow direction. In cooling mode, both indoor heat exchangers function as evaporators simultaneously; in heating mode, both indoor heat exchangers function as condensers simultaneously; and in temperature-controlled dehumidification mode, the first and second indoor heat exchangers function as a reheat condenser and a dehumidification evaporator, respectively.

[0107] 2. The air conditioner also includes a first throttling device 51, a second throttling device 52, a third throttling device 53, and a reheat dehumidification auxiliary throttling device (fourth throttling device 54). The first throttling device 51 is connected in series between the outdoor heat exchanger 3 and the liquid storage device 6; the second throttling device 52 is connected in series between the liquid storage device 6 and the first indoor heat exchanger 41; the third throttling device 53 is connected in series between the liquid storage device 6 and the water tank 8; and the dehumidification throttling device is connected in series between the first indoor heat exchanger 41 and the second indoor heat exchanger 42. The first throttling device 51, the second throttling device 52, and the third throttling device 53 are electronic expansion valves with no flow when closed. The fourth throttling device 54 can be a solenoid valve with closed-circuit throttling or a specially designed dehumidification electronic expansion valve, which has the flow characteristics of large flow rate when fully open, small flow rate during the dehumidification operation, and a sufficiently small slope.

[0108] 3. The air conditioner also has a main four-way reversing valve (four-way valve 21) to switch between different operating modes. The D pipe of the main four-way reversing valve is connected to the exhaust port of the compressor 1, the S pipe is connected to the suction port of the compressor, the E pipe is connected to the second indoor heat exchanger 42, and the C pipe is connected to the outdoor heat exchanger 3.

[0109] 4. The air conditioner also has a refrigerant charge adjustment device (liquid storage device 6), which is connected to the first throttling device 51, the second throttling device 52 and the third throttling device 53 respectively, and the pipes connected to the charge adjustment device are inserted into the position close to the bottom (to ensure that liquid refrigerant enters the connecting pipe).

[0110] 5. The air conditioner has multiple operating modes, including cooling, heating, temperature control and dehumidification, hot water production, cooling and hot water production simultaneously, temperature control and dehumidification and hot water production simultaneously, heating and hot water production simultaneously, and defrosting.

[0111] 6. The air conditioning water heater system uses environmentally friendly and efficient refrigerants such as R32 and R290.

[0112] The present invention has the following beneficial effects:

[0113] 1. This invention connects two heat exchangers in series on the indoor side and then connects them through a dehumidifying electronic expansion valve. One part of the heat exchangers in the indoor side cools and dehumidifies while the other part heats the indoor return air, thereby achieving temperature control and dehumidification during the transition season and improving the comfort of the dehumidification process.

[0114] 2. The cooling and temperature-controlled dehumidification mode recovers the condensation heat that would otherwise be discharged outdoors through the water heater, providing domestic hot water while cooling and dehumidifying, thus improving the overall energy efficiency of the system;

[0115] 3. By installing a refrigerant liquid storage device, efficient operation in different modes can be achieved;

[0116] 4. The multi-functional air conditioning system described in this proposal is relatively simple, reliable, and low in cost.

[0117] like Figure 1 The air conditioning and hot water integrated system with temperature control and dehumidification functions of the present invention shown includes a compressor 1, an outdoor heat exchanger 3, a first throttling device 51, a second throttling device 52, a third throttling device 53, a first indoor heat exchanger 41, a second indoor heat exchanger 42, a water tank heat exchanger 83, a four-way valve 21, an outdoor fan 71, an indoor fan 72, a water tank 8, and a liquid storage device 6 for adjusting the refrigerant charge.

[0118] The compressor 1 of this invention has its exhaust port connected to the D pipe of a four-way valve 21, and its suction port connected to the four-way valve 21. The C pipe of the four-way valve 21 is connected to one end of the outdoor heat exchanger, and the other end of the outdoor heat exchanger is connected to the first throttling device 51. The liquid storage device 6, used to regulate the refrigerant charge, has three connecting pipe interfaces that are respectively connected to the three throttling devices, wherein the three connecting pipes of the liquid storage tank are respectively inserted into the bottom of the liquid storage tank. The first indoor heat exchanger 41 is connected to the second throttling device 52 and the fourth throttling device 54, respectively, and the second indoor heat exchanger is connected to the fourth throttling device 54 and the E pipe of the four-way reversing valve. The refrigerant circulation pipeline of the water tank is connected to the third throttling device 53. This invention can realize multiple operating modes such as individual cooling, heating, dehumidification, hot water production, cooling + hot water production, heating + hot water production, dehumidification + hot water production, and defrosting by controlling the throttling devices and the four-way valve.

[0119] In some implementations...

[0120] It also includes an auxiliary compression cylinder 12, a ninth pipeline 109 and a tenth pipeline 110. The intake end of the auxiliary compression cylinder 12 is connected to the upper interior of the liquid storage device 6 through the ninth pipeline 109, and the exhaust end of the auxiliary compression cylinder 12 is connected to the first pipeline 101 through the tenth pipeline 110.

[0121] Figure 8 In this first alternative embodiment of the invention, the compressor in the main embodiment is replaced with a parallel compressor, which has two compression cylinders, two suction ports, and one discharge port. The original liquid storage device 6 in the main embodiment system also serves as a flash evaporator in this embodiment. The suction port of the auxiliary compression cylinder 12 is connected to the liquid storage device 6 to absorb the refrigerant gas flashed from the liquid storage device 6. This constitutes a parallel compression cycle, reducing the evaporator inlet specific enthalpy, improving the system's cooling efficiency ratio and heating coefficient of performance, and significantly increasing the system's heating capacity. This alternative embodiment can achieve the same functional mode as the main embodiment, and the valve switching and operation mode under different operating modes are similar to those in the main embodiment.

[0122] In some implementations...

[0123] The first indoor heat exchanger 41, the second indoor heat exchanger 42, the second throttling device 52 and the fourth throttling device 54 constitute at least part of the structure of a set of indoor unit units, and there are multiple indoor unit units, and the multiple indoor unit units are connected in parallel to each other.

[0124] Figure 9 In a second alternative embodiment of the present invention, an additional indoor unit is added (i.e., at least one indoor unit unit is connected in parallel, each indoor unit unit including a first indoor heat exchanger 41, a second indoor heat exchanger 42, and corresponding throttling devices: a second throttling device 52 and a fourth throttling device 54), constituting a multi-split mode for the air conditioning system. The indoor unit can be turned on or off independently (in principle, multiple indoor units can be connected in parallel to form a multi-split mode in the system; this embodiment only describes the parallel connection of one multi-split unit). This alternative embodiment can achieve the same functional mode as the main embodiment, and the switching of valves for different operating modes and the operating methods are similar to those in the main embodiment.

[0125] The present invention also provides a control method for an integrated air conditioning and hot water system with temperature control and dehumidification functions as described above, wherein:

[0126] When the integrated air conditioning and hot water system with temperature control and dehumidification functions simultaneously includes a four-way valve 21, a first throttling device 51, a second throttling device 52, a third throttling device 53, and a fourth throttling device 54, the control method includes:

[0127] Testing steps, and the required operating modes of the testing system;

[0128] The judgment step is to determine which of the following operating modes is required: cooling mode, heating mode, dehumidification mode, cooling + hot water mode, heating + hot water mode, dehumidification + hot water mode, and defrosting mode;

[0129] The control steps involve controlling the switching of the four-way valve 21 according to the requirements of different operating modes, as well as controlling the opening and closing of the first throttling device 51, the second throttling device 52, the third throttling device 53, and the fourth throttling device 54, and adjusting the opening size.

[0130] This invention integrates a water tank into a conventional air conditioning system, organically combining a heat pump water heater and an air conditioning system. It controls the switching of a four-way valve and the opening and closing of four throttling devices according to the needs of different operating modes. This allows for multiple operating modes, including cooling, heating, dehumidification, hot water supply, simultaneous cooling and hot water supply, simultaneous heating and hot water supply, dehumidification + hot water production, and defrosting. Specifically, it can simultaneously achieve cooling + hot water production, heating + hot water production, and dehumidification + hot water production modes. By setting up a liquid storage device and connecting the other end of the outdoor heat exchanger, the other end of the first indoor heat exchanger, and the other end of the water tank to the inside of the liquid storage device, the invention can adaptively adjust the refrigerant circulation volume entering the system. Since the refrigerant circulation volume differs under various operating modes, the above-mentioned connection method of the liquid storage device can... By adapting the refrigerant circulation volume to different modes, this invention solves the problem of high power consumption caused by a small required refrigerant flow rate but a large actual circulation flow rate, as well as the problem of insufficient comfort requirements caused by a large required refrigerant flow rate but a small actual circulation flow rate, thus achieving efficient system operation. This invention allows for the sharing or partial sharing of the same heat exchanger and piping system across multiple operating modes. Compared to simultaneously installing an air conditioner and a heat pump water heater, this saves initial investment and operating costs, and improves the overall system efficiency. Furthermore, the air conditioning system of this invention can utilize the condensation heat generated by the refrigeration system to heat water (refrigeration + hot water production mode) when operating both cooling and hot water supply simultaneously, and can use the indoor heat absorbed by dehumidification to produce hot water (dehumidification + hot water production mode). This reduces the system's heat emissions into the environment, lowers thermal pollution, and improves system energy efficiency.

[0131] In some implementations...

[0132] In the control steps, when the required operating mode of the system is the cooling mode, the four-way valve 21 is controlled to connect the first D end D with the first C end C, and at the same time, the first E end E is connected with the first S end S. The third throttling device 53 is controlled to close, the first throttling device 51 and the second throttling device 52 are controlled to open and their opening degrees are controlled to change. The fourth throttling device 54 is fully open.

[0133] When the required operating mode of the system is heating mode, the four-way valve 21 is controlled to connect the first D end D with the first E end E, and at the same time, the first C end C with the first S end S. The third throttling device 53 is controlled to close, the first throttling device 51 and the second throttling device 52 are controlled to open and the opening degree of the two is controlled to change. The fourth throttling device 54 is fully open.

[0134] When the required operating mode of the system is temperature control and dehumidification, the four-way valve 21 is controlled to connect the first D end D with the first C end C, and at the same time, the first E end E with the first S end S. The third throttling device 53 is controlled to close, the first throttling device 51 and the second throttling device 52 are controlled to be fully open, and the fourth throttling device 54 is opened and its opening degree is controlled to change.

[0135] When the required operating mode of the system is cooling + hot water mode, the four-way valve 21 is controlled to connect the first D end D with the first C end C, and at the same time, the first E end E with the first S end S. The first throttling device 51 is controlled to close, and both the first throttling device 51 and the third throttling device 53 are controlled to open to adjust the liquid level in the liquid storage device 6. The second throttling device 52 is controlled to open and its opening degree is controlled to change. The fourth throttling device 54 is fully open.

[0136] When the required operating mode of the system is heating + hot water production mode, the four-way valve 21 is controlled to connect the first D end D with the first E end E, and at the same time, the first C end C with the first S end S. The second throttling device 52 and the third throttling device 53 are both opened to adjust the liquid level in the liquid storage device 6. The first throttling device 51 is opened and its opening degree is controlled to change. The fourth throttling device 54 is fully open.

[0137] like Figure 1 As shown, during cooling mode operation, the four-way valve 21 is de-energized, allowing pipes D and C to conduct, and pipes S and E to conduct, while the third throttling device 53 is closed. The high-temperature, high-pressure refrigerant gas discharged from the compressor enters the outdoor heat exchanger 3 through pipes D and C of the four-way valve 21. In the outdoor heat exchanger 3, it releases heat and condenses into high-pressure liquid refrigerant. Then, after partial throttling by the first throttling device 51, it enters the liquid receiver 6. The refrigerant in the liquid receiver is further throttled and depressurized by the second throttling device 52, becoming a low-temperature, low-pressure two-phase state before entering the first indoor heat exchanger 41 and the second indoor heat exchanger 42. In the indoor heat exchangers, it absorbs heat and vaporizes, cooling the indoor air to meet the cooling requirements. After heat exchange, the low-pressure refrigerant gas enters the compressor's suction port through pipes E and S of the four-way valve 21, where it is compressed into a high-temperature, high-pressure gas state within the compressor cylinder, thus completing the entire refrigeration cycle.

[0138] In this mode, the fourth throttling device 54 is fully open to reduce the refrigerant pressure drop between the first indoor heat exchanger 41 and the second indoor heat exchanger 42. The third throttling device 53, connected to the hot water tank, is closed.

[0139] like Figure 2As shown, during heating mode operation, the four-way valve 21 is energized, connecting pipes D and E, and pipes C and S; the third throttling device 53 is closed. The high-temperature, high-pressure gaseous refrigerant discharged from compressor 1 enters the second indoor heat exchanger 42 and the first indoor heat exchanger 41 sequentially via pipes D and E of the four-way valve 21, condensing and releasing heat to become a high-pressure subcooled liquid. After the second throttling device 52 performs a first throttling and pressure reduction, it enters the liquid receiver 6. The refrigerant in the liquid receiver tank undergoes further throttling and pressure reduction via the first throttling device 51, then enters the outdoor heat exchanger 3 to evaporate and absorb heat, becoming a low-pressure superheated gas. The gaseous refrigerant flowing out of the outdoor heat exchanger 3 enters the compressor suction port via pipes C and S of the four-way valve 21 and is compressed into a high-temperature, high-pressure gaseous state in the compressor cylinder before being discharged from the compressor exhaust port, thus completing the entire heating cycle.

[0140] In this mode, the fourth throttling device 54 is fully open to reduce the refrigerant pressure drop between the second indoor heat exchanger 42 and the first indoor heat exchanger 41. The third throttling device 53, connected to the hot water tank, is closed.

[0141] like Figure 3 As shown, when the temperature and humidity control mode is running, the four-way valve 21 is de-energized, such as... Figure 3 As shown. The D and C pipes of the four-way valve 21 are connected, and the E and S pipes are connected. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor enters the outdoor heat exchanger 3 through the D and C pipes of the four-way valve 21, releases some heat, and then enters the liquid storage device 6. The two-phase refrigerant in the liquid storage device 6 enters the first indoor heat exchanger 41 after passing through the second throttling device 52, continues to release heat and condenses into a subcooled liquid. The refrigerant from the first indoor heat exchanger enters the second indoor heat exchanger 42 after being throttled and depressurized by the fourth throttling device 54. The low-temperature and low-pressure refrigerant absorbs heat and vaporizes in the second indoor heat exchanger 42, becoming a low-pressure superheated gas. It then enters the compressor suction port through the E and S pipes of the four-way valve 21. The refrigerant is compressed into a high-temperature and high-pressure state in the compressor cylinder and then discharged through the compressor discharge port, thus completing the entire reheat dehumidification cycle.

[0142] In this mode, the fourth throttling device 54 is in a throttling state, the first throttling device 51 and the second throttling device 52 are fully open, and the third throttling device 53 connected to the hot water tank is closed. The second indoor heat exchanger 42 acts as a separate evaporator to cool and dehumidify the indoor air, while the first indoor heat exchanger 41 acts as a reheat condenser to heat and raise the temperature of the indoor return air. The low-temperature, low-humidity air passing through the evaporator is mixed with the high-temperature air passing through the reheat heat exchanger before being sent into the room, increasing the supply air temperature during the dehumidification process and ensuring indoor environmental comfort. The supply air temperature can be adjusted by regulating the outdoor fan speed; that is, the lower the outdoor fan speed, the higher the supply air temperature.

[0143] like Figure 4As shown, during hot water production mode, the four-way valve 21 is energized, connecting pipes D and E, and pipes C and S; the second throttling device 52 is closed. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the heat exchanger in the static water tank 8, where it condenses and releases heat to heat the water. The condensed, subcooled liquid refrigerant then enters the liquid storage device 6 through the third throttling device 53. The refrigerant in the liquid storage device 6, after being throttled and depressurized by the first throttling device 51, enters the outdoor heat exchanger 3. The low-temperature, low-pressure refrigerant absorbs heat and vaporizes in the outdoor heat exchanger 3, becoming a low-pressure superheated gas. It then enters the compressor's suction port through pipes C and S of the four-way valve 21. The refrigerant is compressed into a high-temperature, high-pressure state within the compressor cylinder and discharged through the compressor's exhaust port, thus completing the entire hot water production cycle.

[0144] In this mode, the second throttling device 52 is closed, and the third throttling device 53, connected to the hot water tank, controls the refrigerant level in the liquid storage device 6 to ensure that the refrigerant in the system is in an optimal state. The first throttling device 51 plays a major throttling role, controlling the compressor's suction superheat to ensure the reliability and energy efficiency of the system operation.

[0145] like Figure 5 As shown, during the cooling + hot water operation mode, the four-way valve 21 is de-energized, pipes D and C are open, pipes S and E are open, and the first throttling device 51 is closed. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the outdoor heat exchanger 3 and the water tank heat exchanger 83 of the static water tank 8 through the four-way valve 21, respectively. The refrigerant condenses and releases heat as subcooled liquid in the water tank heat exchanger 83 and the outdoor heat exchanger 3, respectively, and enters the liquid storage device 6 through the third throttling device 53 and the first throttling device 51, respectively. The refrigerant in the liquid storage device 6 is throttled and depressurized by the second throttling device 52 and then enters the first indoor heat exchanger 41 and the second indoor heat exchanger 42 in sequence. The low-temperature and low-pressure refrigerant absorbs heat and vaporizes in the first indoor heat exchanger 41 and the second indoor heat exchanger 42, and then enters the suction port of the compressor through the E pipe and S pipe of the four-way valve 21. The refrigerant is compressed into a high-temperature and high-pressure state in the compressor cylinder and then discharged through the compressor exhaust port, thus completing the entire cooling and hot water production cycle.

[0146] In this mode, the fourth throttling device 54 is fully open. The third throttling device 53, connected to the hot water tank, and the first throttling device 51, connected to the outdoor heat exchanger, control the refrigerant level in the liquid storage device 6 to ensure the refrigerant in the system is in optimal condition. The second throttling device 52 plays a major throttling role, controlling the compressor's suction superheat to ensure the reliability and efficiency of system operation. In this mode, the heat load of the water tank 8 and the outdoor heat exchanger 3 can be adjusted by regulating the speed of the outdoor fan 71. When the water temperature in the tank deviates significantly from the set temperature, the first throttling device 51 and the outdoor fan 71 can be shut off; when the water temperature in the tank reaches the set temperature, the third throttling device 53 can be shut off to improve system efficiency.

[0147] In some implementations...

[0148] When the required operating mode of the system is temperature control and dehumidification + hot water production mode

[0149] The four-way valve 21 is controlled to connect the first D end D with the first C end C, and at the same time connect the first E end E with the first S end S;

[0150] The detection step also includes detecting the water temperature in the water tank;

[0151] When the water temperature is less than the first preset value, the system controls the water tank to operate in the indoor dehumidification mode, controls the first throttling device 51 to close, controls the third throttling device 53 and the second throttling device 52 to open to adjust the liquid level in the liquid storage device 6, and controls the fourth throttling device 54 to open and change its opening degree.

[0152] When the water temperature is greater than or equal to the first preset value, the outdoor heat exchanger is controlled to operate in the mode of indoor dehumidification. The third throttling device 53 is controlled to close, and the first throttling device 51 and the second throttling device 52 are both controlled to open to adjust the liquid level in the liquid storage device 6. The fourth throttling device 54 is controlled to open and its opening degree is changed.

[0153] like Figure 6As shown, during the simultaneous temperature control, dehumidification, and hot water production mode, the four-way valve 21 is de-energized. Pipes D and C of the four-way valve 21 are connected, as are pipes E and S. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the water tank heat exchanger 83 of the static water tank 8. After condensing and releasing some heat in the water tank heat exchanger 83, it enters the liquid storage device 6 through the third throttling device 53. The refrigerant in the liquid storage device 6 enters the first indoor heat exchanger 41 through the second throttling device 52, where it further condenses and releases heat, becoming a subcooled liquid. The subcooled liquid then enters the second indoor heat exchanger 42 after being throttled and depressurized by the fourth throttling device 54. The low-temperature, low-pressure refrigerant absorbs heat and vaporizes in the second indoor heat exchanger 42, becoming a low-pressure superheated gas. It then enters the compressor's suction port through pipes E and S of the four-way valve 21. The refrigerant is compressed into a high-temperature, high-pressure state in the compressor cylinder and discharged through the compressor's exhaust port, thus completing the entire cycle of temperature control, dehumidification, and simultaneous hot water production.

[0154] In this mode, the third throttling device 53, connected to the water tank heat exchanger 83, controls the refrigerant level in the liquid storage device 6 to ensure the refrigerant in the system is in optimal condition. The fourth throttling device 54 plays a major throttling role, controlling the compressor's suction superheat to ensure the reliability and energy efficiency of system operation. In this mode, the heat discharged to the outside during temperature-controlled dehumidification can be recovered as hot water. When the water temperature in the water tank exceeds the set temperature, the third throttling device 53 can be closed and the first throttling device 51 and the outdoor fan 71 can be opened; when the water temperature in the water tank reaches the set temperature, the third throttling device 53 can be closed to provide system operating energy efficiency. The condensation heat during the dehumidification process is discharged to the outside through the outdoor heat exchanger to maintain the indoor temperature during the dehumidification process.

[0155] like Figure 7 As shown, during heating + hot water operation, the four-way valve 21 is energized, with pipes D and E connected, and pipes C and S connected. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the four-way valve 21 in two separate paths. One path enters the water tank heat exchanger 83 of the static water tank 8, where it releases heat and condenses before passing through the third throttling device 53 into the liquid storage device 6 to heat the water in the tank. The other path passes through pipes D and E of the four-way valve 21, sequentially entering the second indoor heat exchanger 42 and the first indoor heat exchanger 41, where it releases heat and condenses to heat the indoor air. The condensed refrigerant liquid then passes through the second throttling device 52 into the liquid storage device 6. The refrigerant in the liquid storage device 6 is throttled and depressurized by the first throttling device 51 and then enters the outdoor heat exchanger 3 to evaporate and absorb outdoor heat, becoming a low-pressure superheated gas. The low-pressure superheated gas exiting the outdoor heat exchanger 3 enters the compressor suction port through the C and S pipes of the four-way valve 21. The refrigerant is compressed into a high-temperature and high-pressure state in the compressor cylinder and then discharged through the compressor discharge port, thus completing the entire heating + hot water cycle.

[0156] In this mode, the third throttling device 53 connected to the water tank heat exchanger 83 and the second throttling device 52 regulate the heat load of the first indoor heat exchanger 41, the second indoor heat exchanger 42, and the water tank heat exchanger 83, while controlling the refrigerant level in the liquid storage device 6 to ensure that the refrigerant in the system is in an optimal state. The first throttling device 51 plays a major throttling role, controlling the compressor's suction superheat to ensure the reliability and energy efficiency of the system operation.

[0157] The diagrams for defrosting and cooling modes are the same, as shown below. Figure 1 As shown.

[0158] This invention controls the switching of a four-way valve and a throttling device by detecting the activation status of the system's operating modes, thereby activating different operating modes. The integrated air conditioning and hot water system with temperature control and dehumidification functions of this invention uses environmentally friendly and efficient refrigerants such as R32 and R290.

[0159] In some implementations...

[0160] The judgment step, after determining that it is neither a cooling mode nor a heating mode, then determines whether it is a single hot water mode.

[0161] In the control steps, if it is a single hot water mode, the four-way valve 21 is controlled to connect the first D end D with the first E end E, and at the same time, the first C end C with the first S end S. The second throttling device 52 is controlled to close, and the first throttling device 51 and the third throttling device 53 are controlled to open and their opening degrees are controlled to change.

[0162] The judgment step, after determining that it is neither a cooling mode, nor a heating mode, nor a single hot water mode, then determines whether it is a defrosting mode.

[0163] If it is in defrost mode, control to execute defrost operation mode. The control steps are as follows: if it is in defrost mode, control the four-way valve 21 to connect the first D end D with the first C end C, and at the same time connect the first E end E with the first S end S, and control the third throttling device 53 to close, control the first throttling device 51 and the second throttling device 52 to open, and control the opening degree of the two to change.

[0164] In the judgment step, if it is determined that the system is neither in cooling mode, nor heating mode, nor hot water mode, nor defrosting mode, the control step controls the integrated air conditioning and hot water system with temperature control and dehumidification functions to shut down.

[0165] like Figure 4As shown, during hot water production mode, the four-way valve 21 is energized, connecting pipes D and E, and pipes C and S; the second throttling device 52 is closed. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the heat exchanger in the static water tank 8, where it condenses and releases heat to heat the water. The condensed, subcooled liquid refrigerant then enters the liquid storage device 6 through the third throttling device 53. The refrigerant in the liquid storage device 6, after being throttled and depressurized by the first throttling device 51, enters the outdoor heat exchanger 3. The low-temperature, low-pressure refrigerant absorbs heat and vaporizes in the outdoor heat exchanger 3, becoming a low-pressure superheated gas. It then enters the compressor's suction port through pipes C and S of the four-way valve 21. The refrigerant is compressed into a high-temperature, high-pressure state within the compressor cylinder and discharged through the compressor's exhaust port, thus completing the entire hot water production cycle.

[0166] When operating in single-function hot water mode, the four-way valve 21 is energized, such as... Figure 4 As shown. The D and E pipes of the four-way valve 21 are connected, and the C and S pipes are connected. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the heat exchanger in the static water tank 8, where it condenses and releases heat to heat the water in the tank. The condensed, subcooled liquid refrigerant then enters the liquid storage device 6 through the third throttling device 53. The refrigerant in the liquid storage device 6, after being throttled and depressurized by the first throttling device 51, enters the outdoor heat exchanger 3. The low-temperature, low-pressure refrigerant absorbs heat and vaporizes in the outdoor heat exchanger 3, becoming a low-pressure superheated gas. It then enters the compressor's suction port through the C and S pipes of the four-way valve 21. The refrigerant is compressed into a high-temperature, high-pressure state in the compressor cylinder and then discharged through the compressor's discharge port, thus completing the entire hot water production cycle.

[0167] In this mode, the second throttling device 52 is closed, and the third throttling device 53, connected to the hot water tank, controls the refrigerant level in the liquid storage device 6 to ensure that the refrigerant in the system is in an optimal state. The first throttling device 51 plays a major throttling role, controlling the compressor's suction superheat to ensure the reliability and energy efficiency of the system operation.

[0168] like Figure 1 As shown, during defrosting mode operation, the four-way valve 21 is de-energized, while pipes D and C are open, and pipes S and E are open, and the third throttling device 53 is closed. The high-temperature, high-pressure refrigerant gas discharged from the compressor enters the outdoor heat exchanger 3 through pipes D and C of the four-way valve 21. In the outdoor heat exchanger 3, it is cooled and condensed into high-pressure liquid refrigerant. Then, after partial throttling by the first throttling device 51, it enters the liquid receiver 6. The refrigerant in the liquid receiver is further throttled and depressurized by the second throttling device 52, becoming a low-temperature, low-pressure two-phase state. It then sequentially enters the first indoor heat exchanger 41 and the second indoor heat exchanger 42, absorbing heat and vaporizing in the indoor heat exchangers to cool the indoor air and meet the cooling requirements. After heat exchange, the low-pressure refrigerant gas enters the compressor's suction port through pipes E and S of the four-way valve 21, where it is compressed into a high-temperature, high-pressure gas state in the compressor cylinder, thus completing the entire refrigeration cycle.

[0169] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. An integrated air conditioning and hot water system with temperature control and dehumidification functions, characterized in that: include: The compressor (1), outdoor heat exchanger (3), first indoor heat exchanger (41), second indoor heat exchanger (42), water tank (8) and liquid storage device (6) are provided. The exhaust end of the compressor (1) can be connected to one end of the outdoor heat exchanger (3), or to one end of the second indoor heat exchanger (42), or to one end of the water tank (8). The other end of the outdoor heat exchanger (3) is connected to the interior of the liquid storage device (6). The other end of the second indoor heat exchanger (42) is connected to one end of the first indoor heat exchanger (41). The other end of the first indoor heat exchanger (41) is connected to the interior of the liquid storage device (6). The other end of the water tank (8) is connected to the interior of the liquid storage device (6). The suction end of the compressor (1) can be connected to one end of the outdoor heat exchanger (3) or to one end of the second indoor heat exchanger (42). It also includes a four-way valve (21), which includes a first D end (D), a first E end (E), a first S end (S), and a first C end (C). The four-way valve (21) can switch between the following two connection states: In the first state, the first D end (D) is connected to the first C end (C), and the first E end (E) is connected to the first S end (S); In the second state, the first D end (D) is connected to the first E end (E), and the first C end (C) is connected to the first S end (S). The first D end (D) is connected to the exhaust end of the compressor (1) through the first pipe (101), the first E end (E) is connected to one end of the second indoor heat exchanger (42) through the second pipe (102), the first S end (S) is connected to the suction end of the compressor (1) through the third pipe (103), and the first C end (C) is connected to one end of the outdoor heat exchanger (3) through the fourth pipe (104). The other end of the outdoor heat exchanger (3) is connected to the interior of the liquid storage device (6) through the fifth pipe (105), the other end of the first indoor heat exchanger (41) is connected to the interior of the liquid storage device (6) through the sixth pipe (106), and the other end of the water tank (8) is connected to the interior of the liquid storage device (6) through the seventh pipe (107). The fifth pipeline (105) is provided with a first throttling device (51), the sixth pipeline (106) is provided with a second throttling device (52), the seventh pipeline (107) is provided with a third throttling device (53), the first indoor heat exchanger (41) and the second indoor heat exchanger (42) are connected in series, and a fourth throttling device (54) is also provided between them. One end of the water tank (8) is connected to the exhaust end of the compressor (1) through the eighth pipe (108). The eighth pipe (108) is in contact with the water tank (8) through the refrigerant pipe and exchanges heat with the water in the water tank (8). One end of the water tank (8) is one end of the refrigerant pipe, and the other end of the water tank (8) is the other end of the refrigerant pipe. The other end of the refrigerant pipe is connected to the seventh pipe (107). The refrigerant pipe forms at least part of the structure of the water tank heat exchanger (83). It also includes an indoor fan (72) and an outdoor fan (71), the outdoor fan (71) being opposite to the outdoor heat exchanger (3) to drive airflow to exchange heat with the refrigerant in the outdoor heat exchanger (3), the indoor fan (72) being opposite to at least a portion of the structure of the first indoor heat exchanger (41), and the indoor fan (72) also being opposite to at least a portion of the structure of the second indoor heat exchanger (42) to drive airflow to exchange heat with the refrigerant in the first indoor heat exchanger (41) and the second indoor heat exchanger (42).

2. The integrated air conditioning and hot water system with temperature control and dehumidification functions according to claim 1, characterized in that: The fifth pipe (105) is connected to the inside of the liquid storage device (6) at one end, which is the first end. The first end is higher than the inner bottom surface of the liquid storage device (6) by a distance of the first height. The sixth pipe (106) is connected to the inside of the liquid storage device (6) at one end, which is the second end. The second end is higher than the inner bottom surface of the liquid storage device (6) by a distance of the second height. The seventh pipe (107) is connected to the inside of the liquid storage device (6) at one end, which is the third end. The third end is higher than the inner bottom surface of the liquid storage device (6) by a distance of the third height. The distance between the first end and the top of the liquid storage device (6) is the fourth height, and the fourth height is greater than the first height. The distance between the second end and the top of the liquid storage device (6) is the fifth height, and the fifth height is greater than the second height. The distance between the third end and the top of the liquid storage device (6) is the sixth height, and the sixth height is greater than the third height.

3. The integrated air conditioning and hot water system with temperature control and dehumidification functions according to claim 2, characterized in that: The liquid storage device (6) has a middle height dividing line at half the height, the first end is at a distance of the seventh height from the middle height dividing line, and the seventh height is greater than the first height, the second end is at a distance of the eighth height from the middle height dividing line, and the eighth height is greater than the second height, the third end is at a distance of the ninth height from the middle height dividing line, and the ninth height is greater than the third height.

4. The integrated air conditioning and hot water system with temperature control and dehumidification functions according to claim 1, characterized in that: It also includes an auxiliary compression cylinder (12), a ninth pipeline (109) and a tenth pipeline (110). The intake end of the auxiliary compression cylinder (12) is connected to the upper interior of the liquid storage device (6) through the ninth pipeline (109), and the exhaust end of the auxiliary compression cylinder (12) is connected to the first pipeline (101) through the tenth pipeline (110).

5. The integrated air conditioning and hot water system with temperature control and dehumidification function according to claim 1, characterized in that: The first indoor heat exchanger (41), the second indoor heat exchanger (42), the second throttling device (52) and the fourth throttling device (54) constitute at least part of the structure of a set of indoor unit units, wherein there are multiple indoor unit units and the multiple indoor unit units are connected in parallel to each other.

6. A control method for an integrated air conditioning and hot water system with temperature control and dehumidification function as described in any one of claims 1-5, characterized in that: include: Testing steps, and the required operating modes of the testing system; The judgment step is to determine which of the following operating modes is required: cooling mode, heating mode, temperature control and dehumidification mode, cooling + hot water mode, heating + hot water mode, hot water only mode, and defrosting mode. The control steps involve controlling the switching of the four-way valve (21) according to the needs of different operating modes, as well as controlling the opening and closing of the first throttling device (51), the second throttling device (52), the third throttling device (53), and the fourth throttling device (54) and adjusting the opening size.

7. The control method according to claim 6, characterized in that: In the control steps, when the required operating mode of the system is the cooling mode, the four-way valve (21) is controlled to connect the first D end (D) with the first C end (C), and at the same time, the first E end (E) is connected with the first S end (S). The third throttling device (53) is controlled to close, the first throttling device (51) and the second throttling device (52) are controlled to open and the opening degree of the two is controlled to change. The fourth throttling device (54) is fully open. When the required operating mode of the system is heating mode, the four-way valve (21) is controlled to connect the first D end (D) with the first E end (E), and at the same time the first C end (C) is connected with the first S end (S), and the third throttling device (53) is controlled to close, the first throttling device (51) and the second throttling device (52) are controlled to open and the opening degree of the two is controlled to change, and the fourth throttling device (54) is fully open; When the required operating mode of the system is temperature control and dehumidification mode, the four-way valve (21) is controlled to connect the first D end (D) with the first C end (C), and at the same time the first E end (E) is connected with the first S end (S), and the third throttling device (53) is controlled to close, the first throttling device (51) and the second throttling device (52) are controlled to be fully open, and the fourth throttling device (54) is opened and its opening degree is controlled to change. When the required operating mode of the system is cooling + hot water mode, the four-way valve (21) is controlled to connect the first D end (D) with the first C end (C), and at the same time the first E end (E) is connected with the first S end (S). The first throttling device (51) and the third throttling device (53) are both opened to adjust the liquid level in the liquid storage device (6). The second throttling device (52) is opened and its opening degree is controlled to change. The fourth throttling device (54) is fully open. When the required operating mode of the system is heating + hot water mode, the four-way valve (21) is controlled to connect the first D end (D) with the first E end (E), and at the same time the first C end (C) is connected with the first S end (S). The second throttling device (52) and the third throttling device (53) are both opened to adjust the liquid level in the liquid storage device (6). The first throttling device (51) is opened and its opening degree is controlled to change. The fourth throttling device (54) is fully open.

8. The control method according to claim 6, characterized in that: When the system requires a single-function hot water mode. Control the four-way valve (21) so that the first D end (D) is connected to the first C end (C), and at the same time the first E end (E) is connected to the first S end (S); The detection step also includes detecting the water temperature in the water tank; When the water temperature is less than the first preset value, the system controls the water tank to perform indoor dehumidification, controls the first throttling device (51) to close, controls the third throttling device (53) and the second throttling device (52) to open to adjust the liquid level in the liquid storage device (6), and controls the fourth throttling device (54) to open and change its opening size. When the water temperature is ≥ the first preset value, the outdoor heat exchanger is controlled to perform indoor dehumidification operation mode, the third throttling device (53) is controlled to close, and the first throttling device (51) and the second throttling device (52) are both controlled to open to adjust the liquid level in the liquid storage device (6), and the fourth throttling device (54) is controlled to open and its opening degree is changed.

9. The control method according to claim 7, characterized in that: The judgment step, after determining that it is neither a cooling mode nor a heating mode, then determines whether it is a single hot water mode. In the control steps, if it is a single hot water mode, the four-way valve (21) is controlled to connect the first D end (D) with the first E end (E), and at the same time the first C end (C) is connected with the first S end (S), and the second throttling device (52) is controlled to close, and the first throttling device (51) and the third throttling device (53) are controlled to open and the opening degree of the two is controlled to change. The judgment step, after determining that it is neither a cooling mode, nor a heating mode, nor a single hot water mode, then determines whether it is a defrosting mode. If it is in defrost mode, control the execution of defrost operation mode, control the four-way valve (21) to connect the first D end (D) with the first C end (C), and at the same time connect the first E end (E) with the first S end (S), and control the third throttling device (53) to close, control the first throttling device (51) and the second throttling device (52) to open and control the opening degree of the two to change; In the judgment step, if it is determined that the system is neither in cooling mode, nor heating mode, nor hot water mode, nor defrosting mode, the control step controls the integrated air conditioning and hot water system with temperature control and dehumidification functions to shut down.

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