An integrated air conditioning and hot water unit with temperature control and dehumidification functions and its control method.

Abstract

This invention provides an integrated air conditioning and hot water unit with temperature control and dehumidification functions, and its control method. The integrated system includes: a compressor, an outdoor heat exchanger, first and second indoor heat exchangers, a water tank, and a liquid storage device. The compressor's discharge end is connected to the outdoor heat exchanger, the first indoor heat exchanger, or the water tank. One end of the second indoor heat exchanger is connected to the compressor's discharge end or suction end, and the other end is connected to the liquid storage device. The outdoor heat exchanger, the first indoor heat exchanger, or the water tank is connected to the interior of the liquid storage device. The compressor's suction end is connected to one end of the outdoor heat exchanger, one end of the first indoor heat exchanger, or one end of the water tank. The first and second indoor heat exchangers are also respectively connected to throttling devices. According to this invention, it can simultaneously achieve cooling + hot water production, heating + hot water production, and dehumidification + hot water production modes. It can also adapt to the refrigerant circulation volume in different modes, solving the problems of high power consumption and failure to meet comfort requirements, and ensuring efficient system operation.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically to an integrated air conditioning and hot water unit 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 conditioner and hot water unit 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 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 the comfort requirements. Thus, the present invention provides an integrated air conditioner and hot water unit with temperature control and dehumidification functions and its control method.

[0008] To address the above problems, this invention provides an integrated air conditioning and hot water unit 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 first 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 first indoor heat exchanger is connected to the interior of the liquid storage device. One end of the second indoor heat exchanger is connected to either the discharge end or the suction end of the compressor. The other end of the second 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 first indoor heat exchanger, or to one end of the water tank.

[0010] The other end of the first indoor heat exchanger is connected to the interior of the liquid storage device through a sixth pipe, and the other end of the second indoor heat exchanger is connected to the interior of the liquid storage device through a seventh pipe; a second throttling device is provided on the sixth pipe, and a third throttling device is provided on the seventh pipe.

[0011] In some implementations...

[0012] It also includes a first four-way valve, which comprises a first D-end, a first E-end, a first S-end, and a first C-end. The first 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.

[0013] The first D end is connected to the discharge end of the compressor through a first pipeline, the first C end is connected to one end of the outdoor 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 E end is connected to one end of the first indoor heat exchanger through a fourth pipeline.

[0014] In some implementations...

[0015] The other end of the outdoor heat exchanger is connected to the interior of the liquid storage device via the fifth pipeline, and the other end of the water tank is connected to the interior of the liquid storage device via the eighth pipeline.

[0016] In some implementations...

[0017] The fifth pipeline is equipped with a first throttling device, the eighth pipeline is equipped with a fourth throttling device, and the first indoor heat exchanger and the second indoor heat exchanger are arranged on the same airflow path indoors.

[0018] In some implementations...

[0019] The fifth pipeline connects to the interior 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 and seventh pipelines merge and connect to the liquid storage device together. The merged pipeline connects to the interior 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 eighth pipeline connects to the interior 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.

[0020] In some implementations...

[0021] 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.

[0022] In some implementations...

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

[0026] The second D end is connected to the discharge end of the compressor through the ninth pipe, the second S end is connected to the suction end of the compressor through the tenth pipe, the second C end is connected to one end of the water tank through the eleventh pipe, and the second E end is connected to one end of the second indoor heat exchanger through the twelfth pipe.

[0027] The eleventh pipeline contacts the water tank through a refrigerant pipeline and exchanges heat with the water in the water tank. One end of the water tank is one end of the refrigerant pipeline, and the other end of the water tank is the other end of the refrigerant pipeline. The other end of the refrigerant pipeline is connected to the eighth pipeline. The refrigerant pipeline forms at least a part of the structure of the water tank heat exchanger.

[0028] In some implementations...

[0029] The compressor includes a first cylinder and a second cylinder. The first cylinder has a first intake port, and the second cylinder has a second intake port. The first S end of the first four-way valve is connected to the first intake port of the first cylinder through the third pipeline, and the second S end of the second four-way valve is connected to the second intake port of the second cylinder through the tenth pipeline.

[0030] It also includes a thirteenth pipeline, one end of which is connected to the third pipeline and the other end of which is connected to the tenth pipeline. A control valve is installed on the thirteenth pipeline.

[0031] In some implementations...

[0032] It also includes an auxiliary compression cylinder and a fourteenth pipeline. The auxiliary compression cylinder has a third air intake port, which is connected to the upper interior of the liquid storage device through the fourteenth pipeline. The gas discharged from the auxiliary compression cylinder mixes with the gas discharged from the first cylinder and the gas discharged from the second cylinder inside the compressor housing and is discharged through the first pipeline and / or the ninth pipeline.

[0033] In some implementations...

[0034] The first indoor heat exchanger, the second indoor heat exchanger, the second throttling device, and the third throttling device constitute at least a portion of the structure of an indoor unit unit. There are multiple indoor unit units, and the first indoor heat exchanger of each indoor unit is connected between the first four-way valve and the liquid storage device, and the second indoor heat exchanger of each indoor unit is connected between the second four-way valve and the liquid storage device.

[0035] This invention also provides a control method for an integrated air conditioner and water heater with temperature control and dehumidification function as described above, wherein: when the integrated air conditioner and water heater with temperature control and dehumidification function simultaneously includes a first four-way valve, a second four-way valve, a first throttling device, a second throttling device, a third throttling device, a fourth throttling device, and a control valve, the control method includes:

[0036] Testing steps, and the required operating modes of the testing system;

[0037] 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;

[0038] The control steps include, according to the requirements of different operating modes, controlling the switching of the first four-way valve and the second four-way valve, 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, and controlling the opening and closing of the control valve.

[0039] In some implementations...

[0040] The control steps include, when the required operating mode of the system is cooling mode, controlling the first 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 second four-way valve to connect the second D end with the second C end and the second E end with the second S end, controlling the fourth throttling device to close, controlling the first throttling device, the second throttling device, and the third throttling device to open and control the opening degree of the three to change, and controlling the control valve to close.

[0041] When the required operating mode of the system is heating mode, the first four-way valve is controlled to connect the first D end to the first E end, and the first C end to the first S end. The second four-way valve is controlled to connect the second D end to the second E end, and the second C end to the second S end. The fourth throttling device is controlled to close. The first throttling device, the second throttling device, and the third throttling device are all controlled to open and their opening degrees are controlled to change. The control valve is controlled to close.

[0042] When the required operating mode of the system is temperature control and dehumidification, the first 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. The second four-way valve is controlled to connect the second D end with the second E end, and the second C end with the second S end. The fourth throttling device is controlled to close. The first throttling device, the second throttling device, and the third throttling device are all controlled to open, and the opening degree of the three is controlled to change. The control valve is also controlled to open.

[0043] When the required operating mode of the system is cooling + hot water mode, the first 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. The second four-way valve is controlled to connect the second D end with the second C end and the second E end with the second S end. The first throttling device is closed, and the second, third, and fourth throttling devices are all opened and their opening degrees are controlled to change, which can adjust the liquid level in the liquid storage device and control the control valve to close.

[0044] When the system requires a heating + hot water production mode, the first four-way valve is controlled to connect the first D end to the first E end and the first C end to the first S end. The second four-way valve is controlled to connect the second D end to the second C end and the second E end to the second S end. The third throttling device is closed. The first, second, and fourth throttling devices are all opened, and their opening degrees are controlled to change, thereby adjusting the liquid level in the storage device and opening the control valve.

[0045] In some implementations...

[0046] 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.

[0047] In the control steps, if it is a single hot water mode, the first four-way valve is controlled to connect the first D end to the first E end and the first C end to the first S end. The second four-way valve is controlled to connect the second D end to the second C end and the second E end to the second S end. The second throttling device and the third throttling device are both closed. The first throttling device and the fourth throttling device are controlled to open and their opening degrees are controlled to change. The control valve is also controlled to open.

[0048] In some implementations...

[0049] 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.

[0050] If the defrost mode is in use, the detection steps also include detecting the water temperature in the water tank;

[0051] When the water temperature is greater than or equal to the preset value, the system controls the execution of the heat storage defrosting operation mode. The system controls the first four-way valve to connect the first D end with the first C end and the first E end with the first S end. The system controls the second four-way valve to connect the second D end with the second E end and the second C end with the second S end. The second throttling device and the third throttling device are both closed. The system controls the first throttling device and the fourth throttling device to open and controls the opening degree of both to change. The system also controls the control valve to open.

[0052] When the water temperature is less than the preset value, the system controls the execution of the normal defrosting mode, controls the first four-way valve to connect the first D end with the first C end and the first E end with the first S end, controls the second four-way valve to connect the second D end with the second C end and the second E end with the second S end, controls the fourth throttling device to close, controls the first throttling device, the second throttling device, and the third throttling device to open and controls the opening degree of the three to change, and controls the control valve to close.

[0053] In the judgment step, if it is determined that the mode is neither cooling mode, nor heating mode, nor hot water mode, nor defrosting mode, the control step controls the air conditioning and hot water unit with temperature control and dehumidification function to stop.

[0054] The air conditioning and hot water integrated unit with temperature control and dehumidification functions and its control method provided by the present invention have the following beneficial effects:

[0055] 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, heat storage defrosting, and conventional 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 first and second indoor heat exchangers, and 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 liquid storage device... The aforementioned connection method can adapt to the refrigerant circulation volume in 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 not meeting 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 in 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

[0056] Figure 1 This is a flow path structure diagram of the air conditioner and water heater with temperature control and dehumidification function of the present invention in the cooling & conventional defrosting mode;

[0057] Figure 2 This is a flow path structure diagram of the air conditioner and water heater with temperature control and dehumidification function of the present invention in heating mode;

[0058] Figure 3 This is a flow path structure diagram of the air conditioner and hot water unit with temperature control and dehumidification function of the present invention in the temperature control and dehumidification mode;

[0059] Figure 4 This is a flow path structure diagram of the air conditioning and hot water integrated unit with temperature control and dehumidification function of the present invention in single hot water mode;

[0060] Figure 5 This is a flow path structure diagram of the air conditioner and hot water unit with temperature control and dehumidification function of the present invention in the cooling + hot water production mode;

[0061] Figure 6This is a flow path structure diagram of the air conditioning and hot water integrated unit with temperature control and dehumidification function of the present invention in the heating + hot water mode;

[0062] Figure 7 This is a flow path structure diagram of the air conditioner and hot water unit with temperature control and dehumidification function of the present invention in the heat storage defrosting mode;

[0063] Figure 8 This is a system structure diagram of an alternative embodiment 1 of the present invention, featuring an integrated air conditioning and hot water unit with temperature control and dehumidification functions;

[0064] Figure 9 This is a system structure diagram of an alternative embodiment 2 of the present invention, featuring an integrated air conditioning and hot water unit with temperature control and dehumidification functions.

[0065] The reference numerals in the attached figures are as follows:

[0066] 10. Compressor; 11. Discharge port; 12. First suction port; 13. Second suction port; 14. Third suction port; 20. Outdoor heat exchanger; 31. First throttling device; 32. Second throttling device; 33. Third throttling device; 34. Fourth throttling device; 41. First indoor heat exchanger; 42. Second indoor heat exchanger; 51. First four-way valve; C, first C end; D, first D end; E, first E end; S, first S end; 52. Second four-way valve; C', second C end; D', second D end; E', second E end; S', second S end; 61. Outdoor fan; 62. Indoor fan; 70. Control valve; 80. Liquid storage device; 90. Water tank; 91. Water tank inlet; 92. Water tank outlet; 93. Refrigerant inlet 94. Refrigerant outlet; 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; 111. Eleventh pipeline; 112. Twelfth pipeline; 113. Thirteenth pipeline; 114. Fourteenth pipeline. Detailed Implementation

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] like Figure 1-9 As shown, the present invention provides an integrated air conditioning and hot water unit with temperature control and dehumidification functions, comprising:

[0074] The system comprises a compressor 10, an outdoor heat exchanger 20, a first indoor heat exchanger 41, a second indoor heat exchanger 42, a water tank 90, and a liquid storage device 80 (liquid storage tank). The discharge end of the compressor 10 can be connected to one end of the outdoor heat exchanger 20, one end of the first indoor heat exchanger 41, or one end of the water tank 90. ​​The other end of the outdoor heat exchanger 20 is connected to the interior of the liquid storage device 80. The other end of the first indoor heat exchanger 41 is connected to the interior of the liquid storage device 80. One end of the second indoor heat exchanger 42 can be connected to either the discharge end or the suction end of the compressor 10. The other end of the second indoor heat exchanger 42 is connected to the interior of the liquid storage device 80. The other end of the water tank 90 is connected to the interior of the liquid storage device 80. The suction end of the compressor 10 can be connected to one end of the outdoor heat exchanger 20, one end of the first indoor heat exchanger 41, or one end of the water tank 90.

[0075] The other end of the first indoor heat exchanger 41 is connected to the interior of the liquid storage device 80 through the sixth pipe 106, and the other end of the second indoor heat exchanger 42 is connected to the interior of the liquid storage device 80 through the seventh pipe 107; a second throttling device 32 is provided on the sixth pipe 106, and a third throttling device 33 is provided on the seventh pipe 107.

[0076] 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, heat storage defrosting, and conventional 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 first and second indoor heat exchangers, and 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 aforementioned connection method of the liquid storage device can adaptively adjust the refrigerant circulation volume under different modes, solving the problem of... This invention addresses the problem of high power consumption caused by a small required refrigerant flow rate but a large actual circulation flow rate, and also solves the problem of insufficient comfort levels 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.

[0077] To address the issues of high energy consumption during low-load operation of conventional household inverter air conditioners in summer and low comfort levels during humid transitional seasons, and to simultaneously recover waste heat from outdoor emissions to meet domestic hot water needs, this invention provides an air conditioning water heater system with temperature control and dehumidification functions. This system can simultaneously provide cooling, heating, temperature control and dehumidification, hot water production, and defrosting. By installing throttling devices on the pipes of the two indoor heat exchangers, the refrigerant flow rate of each indoor heat exchanger can be precisely adjusted, achieving accurate temperature control for different indoor spaces and further improving the comfort of cooling / heating / dehumidification.

[0078] This invention can solve the following technical problems:

[0079] 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;

[0080] 2. Solve the problem of heat waste caused by air conditioners releasing heat to the outside during cooling and temperature control / dehumidification operation; solve the problem of high energy consumption caused by excessively low evaporation temperature when conventional inverter air conditioners are running under low load cooling and dehumidification operation;

[0081] 3. Solves the problem of slow defrosting speed in conventional defrosting mode, reduces indoor temperature fluctuations, and improves the comfort of users operating at low temperatures;

[0082] 4. Resolve the issue of refrigerant charge mismatch during multi-mode operation;

[0083] 5. In addition to providing conventional cooling and heating functions, an air conditioning system can also function as a temperature control and dehumidifier, as well as a water heater, thereby reducing equipment costs and downtime.

[0084] 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.

[0085] In some implementations...

[0086] It also includes a first four-way valve 51 (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 first four-way valve 51 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).

[0087] The first D end D is connected to the exhaust end of the compressor 10 through the first pipe 101, the first C end C is connected to one end of the outdoor heat exchanger 20 through the second pipe 102, the first S end S is connected to the suction end of the compressor 10 through the third pipe 103, and the first E end E is connected to one end of the first indoor heat exchanger 41 through the fourth pipe 104.

[0088] This is the preferred structural form of the present invention. The first four-way valve can effectively switch modes, especially the connection position between the first indoor heat exchanger 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.

[0089] The air conditioner of the present invention also has a main four-way valve (first four-way valve 51) 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 10, 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 20.

[0090] In some implementations...

[0091] The other end of the outdoor heat exchanger 20 is connected to the interior of the liquid storage device 80 through the fifth pipe 105, and the other end of the water tank 90 is connected to the interior of the liquid storage device 80 through the eighth pipe 108.

[0092] 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, the other end of the second indoor heat exchanger is connected to the interior of the liquid storage device via a seventh pipe, and the other end of the water tank is connected to the interior of the liquid storage device via an eighth pipe. This allows the liquid storage device to transport different amounts of refrigerant liquid from its interior to the outdoor heat exchanger via the fifth pipe, to the first indoor heat exchanger via the sixth pipe, to the second indoor heat exchanger via the seventh pipe, and to the water tank via the eighth pipe, under different operating modes. This adaptively manages the refrigerant circulation volume 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.

[0093] Because the optimal injection rate varies across different operating modes, the optimal injection rate in cooling mode tends to be higher in heating mode. Therefore, to ensure the system operates optimally in all modes, a liquid storage tank is added. The advantages of adding a liquid storage tank are:

[0094] 1. Adjust the optimal refrigerant circulation flow rate in the system. When the system charge is matched to the optimal value under the rated cooling condition, the amount of refrigerant required is less when operating in hot water and heating modes. Therefore, by adjusting the opening of the electronic expansion valve upstream of the liquid receiver tank, the subcooling of the system is adjusted, which reduces the amount of refrigerant circulating in the system. The excess refrigerant is stored in the liquid receiver tank, which reduces the condensing pressure and improves the system energy efficiency.

[0095] Specifically:

[0096] The cooling mode optimizes the system's superheat and energy efficiency by adjusting three electronic expansion valves (first throttling device 31, second throttling device 32, and third throttling device 33).

[0097] When operating in heating mode only, since the volume of the indoor heat exchanger is generally smaller than that of the outdoor heat exchanger, there is more refrigerant in the system. Some of the refrigerant is stored in the liquid tank. Adjusting the above three electronic expansion valves will make the system operate near its optimal state.

[0098] When running in cooling mode + hot water mode, because the capacity of the water tank heat exchanger is smaller than that of the outdoor heat exchanger, there is too much refrigerant in the system. Therefore, adjusting the fourth throttling device 34, the second throttling device 32 and the third throttling device 33 increases the refrigerant level in the storage tank and reduces the circulating refrigerant in the system.

[0099] When operating in hot water only mode, adjust the fourth throttling device 34 and the first throttling device 31 to further increase the liquid level in the storage tank;

[0100] When operating in heating + hot water mode, the liquid level in the storage tank decreases, and its filling volume is similar to that in cooling mode.

[0101] When operating in temperature-controlled dehumidification mode only, the injection volume is similar to that in cooling mode.

[0102] 2. When the system adopts parallel compression cycle, gas-liquid separation occurs. The separated gas enters the compressor as supplementary gas, reducing the inlet specific enthalpy of the evaporator and improving the system's operating capacity and energy efficiency.

[0103] In some implementations...

[0104] The fifth pipeline 105 is provided with a first throttling device 31, the eighth pipeline 108 is provided with a fourth throttling device 34, and the first indoor heat exchanger 41 and the second indoor heat exchanger 42 are arranged on the same airflow path indoors.

[0105] 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 first indoor heat exchanger, thereby 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 second indoor heat exchanger, thereby effectively controlling the refrigerant flow through the second indoor heat exchanger. A fourth throttling device on the eighth pipeline can regulate or shut off the refrigerant flow through or out of the water tank, thereby effectively controlling the refrigerant flow through the water tank, thus meeting the refrigerant flow requirements of the indoor and outdoor heat exchangers and the water tank under different operating modes. The 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.

[0106] The water tank heat exchanger in the air conditioning system water tank 90 of the present invention forms different communication methods with the outdoor heat exchanger 20, the first indoor heat exchanger 41 and the second indoor heat exchanger 42 through different combinations of the first four-way valve 51, the second four-way valve 52 and the first throttling device 31, the second throttling device 32, the third throttling device 33 and the fourth throttling device 34. This allows for the realization of multiple operating modes such as cooling, heating, dehumidification, hot water production, cooling + hot water production, heating + hot water production, dehumidification + hot water production, heat storage defrosting and conventional defrosting, to meet the needs of different users.

[0107] In the air conditioning system of the present invention, the first throttling device 31 is preferably connected in series between the outdoor heat exchanger 20 and the liquid storage device 80, the second throttling device 32 is preferably connected in series between the liquid storage device 80 and the first indoor heat exchanger 41, the third throttling device 33 is connected in series between the liquid storage device 80 and the second indoor heat exchanger 42, and the fourth throttling device 34 is connected in series between the liquid storage device 80 and the water tank 90. ​​The first throttling device 31, the second throttling device 32, the third throttling device 33, and the fourth throttling device 34 are preferably valve-closed, flow-free throttling devices. When the system needs to switch operating modes, closing these throttling devices can cut off the refrigerant operation in this section of the pipeline.

[0108] The air conditioning and hot water system of the present invention controls the opening and closing of the first four-way valve, the second four-way valve, the first to fourth throttling devices, and the control valves by detecting the activation status of the system operation mode, thereby activating different operation modes; and activates different defrosting operation modes (heat storage defrosting improves defrosting efficiency) by detecting the water temperature in the water tank and comparing it with the set temperature; the air conditioning and hot water integrated unit with temperature control and dehumidification function of the present invention preferably uses environmentally friendly and efficient refrigerants such as R32 and R290.

[0109] In some implementations...

[0110] The fifth pipe 105 is connected to the inside of the liquid storage device 80 at one end, which is the first end. The first end is higher than the inner bottom surface of the liquid storage device 80 by a first height. The sixth pipe 106 and the seventh pipe 107 merge and are connected to the liquid storage device 80. The end of the merged pipe connected to the inside of the liquid storage device 80 is the second end, which is higher than the inner bottom surface of the liquid storage device 80 by a second height. The eighth pipe 108 is connected to the inside of the liquid storage device 80 at one end, which is the third end. The third end is higher than the inner bottom surface of the liquid storage device 80 by a third height. The distance from the first end to the top of the liquid storage device 80 is the fourth height, and the fourth height is greater than the first height. The distance from the second end to the top of the liquid storage device 80 is the fifth height, and the fifth height is greater than the second height. The distance from the third end to the top of the liquid storage device 80 is the sixth height, and the sixth height is greater than the third height.

[0111] This is a further preferred structural form of the air conditioning and hot water integrated unit with temperature control and dehumidification function of the present invention. Specifically, the insertion height of the fifth, sixth + seventh and eighth pipes into the liquid storage device is all located at the lower end. This allows for effective 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, solving 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 operation of the system.

[0112] In some implementations...

[0113] The liquid storage device 80 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.

[0114] This is a further preferred structural form of the air conditioning and hot water integrated unit with temperature control and dehumidification function of the present invention. Specifically, the insertion height of the fifth, sixth + seventh and eighth 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 refrigerant flow rate circulating in the system under different operating modes, solving 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.

[0115] 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 31, the second throttling device 32, the third throttling device 33 and the fourth throttling device 34 respectively, and the pipes connected to the charge adjustment device are all inserted into a position close to the bottom.

[0116] In some implementations...

[0117] It also includes an indoor fan 62 and an outdoor fan 61. The outdoor fan 61 is opposite to the outdoor heat exchanger 20 so as to drive airflow to exchange heat with the refrigerant in the outdoor heat exchanger 20. The indoor fan 62, the first indoor heat exchanger 41 and the second indoor heat exchanger 42 are all located on the same airflow path. Along the airflow direction, the second indoor heat exchanger 42 is located downstream of the first indoor heat exchanger 41, and the indoor fan 62 is located upstream of the first indoor heat exchanger 41 or downstream of the second indoor heat exchanger 42.

[0118] In some implementations...

[0119] It also includes a second four-way valve 52, which includes a second D-terminal D', a second C-terminal C', a second S-terminal S', and a second E-terminal E'. The second four-way valve 52 can switch between the following two connection states: In the first state, the second D-terminal D' is connected to the second C-terminal C', and the second S-terminal S' is connected to the second E-terminal E'; In the second state, the second D-terminal D' is connected to the second E-terminal E', and the second C-terminal C' is connected to the second S-terminal S'.

[0120] The second D end D' is connected to the discharge end of the compressor 10 through the ninth pipe 109, the second S end S' is connected to the suction end of the compressor 10 through the tenth pipe 110, the second C end C' is connected to one end of the water tank 90 through the eleventh pipe 111, and the second E end E' is connected to one end of the second indoor heat exchanger 42 through the twelfth pipe 112.

[0121] The eleventh pipe 111 contacts the water tank 90 through a refrigerant pipe and exchanges heat with the water in the water tank 90. ​​One end of the water tank 90 is one end of the refrigerant pipe, and the other end of the water tank 90 is the other end of the refrigerant pipe. The other end of the refrigerant pipe is connected to the eighth pipe 108. The refrigerant pipe forms at least part of the structure of the water tank heat exchanger.

[0122] This invention, by setting a second four-way valve, connects the water tank and the second indoor heat exchanger to an air conditioning refrigeration system, enabling hot water production. It also allows for indoor heating via the second indoor heat exchanger, and while the second indoor heat exchanger is heating, the first indoor heat exchanger can also cool the room. This achieves multiple functions including hot water production + cooling, hot water production + heating, and hot water production + dehumidification. The ninth pipe connects one end of the water tank to the compressor's exhaust end. When hot water is needed, adjusting the second four-way valve connects the second C end and the second D end, and opening the fourth throttling device allows for the use of high temperature and high pressure. The refrigerant enters the water tank to heat the water, producing hot water at the required temperature. When defrosting is needed, the second four-way valve is adjusted to connect the second C terminal and the second S terminal. Opening the fourth throttling device allows the high-temperature, high-pressure refrigerant to enter the outdoor heat exchanger for defrosting. The low-temperature refrigerant after heat exchange then enters the water tank to absorb the stored heat, preventing a drop in indoor temperature and improving comfort. The fourth throttling device can be opened and throttled to achieve indoor dehumidification, dehumidification + hot water production, and defrosting using the stored heat energy of the water tank.

[0123] The air conditioner of the present invention also has a main four-way reversing valve (first four-way valve 51) and an auxiliary four-way valve (second four-way valve 52) 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 10, the S pipe is connected to the suction port of the compressor, the E pipe is connected to the first indoor heat exchanger 41, and the C pipe is connected to the outdoor heat exchanger 20.

[0124] In some implementations...

[0125] The compressor includes a first cylinder and a second cylinder. The first cylinder has a first intake port 12, and the second cylinder has a second intake port 13. The first S end S of the first four-way valve 51 is connected to the first intake port 12 of the first cylinder through the third pipeline 103, and the second S end S' of the second four-way valve 52 is connected to the second intake port 13 of the second cylinder through the tenth pipeline 110.

[0126] It also includes a thirteenth pipe 113, one end of which is connected to the third pipe 103 and the other end of which is connected to the tenth pipe 110. A control valve 70 is provided on the thirteenth pipe 113.

[0127] This invention connects the first and second cylinders and the first and second air intakes to the first and second indoor heat exchangers via first and second four-way valves, enabling dual-temperature cooling and dual-temperature heating for multiple indoor environments, as well as hot water production and dehumidification, and separate dehumidification. Through a control valve and a thirteenth pipeline, the two pipelines connecting to the air intakes of the two cylinders can be integrated into one unit. This means that when only the outdoor heat exchanger is evaporating or only the water tank is acting as an evaporator, the pipeline returning to the compressor can be redirected back to the two cylinders, ensuring that both cylinders have air intake and can perform normal compression.

[0128] 1. The air-conditioning water heater of the present invention comprises a compressor 10, an outdoor heat exchanger 20, a first indoor heat exchanger 41, a second indoor heat exchanger 42, an outdoor fan 61, and an indoor fan 62. The first and second indoor heat exchangers are arranged upstream and downstream along the airflow 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 second and first indoor heat exchangers function as a reheat condenser and a dehumidification evaporator, respectively.

[0129] The compressor has a first compression section, a second compression section, a first suction port 12, a second suction port 13, and a discharge port 11. The first and second compression sections are connected to the first and second suction ports, respectively, and are also connected to the discharge port. The water tank has a refrigerant inlet 93 and a refrigerant outlet 94. The refrigerant inlet 93 is connected to the compressor discharge port 11, and the refrigerant outlet 94 is connected to the liquid storage device 80. The liquid storage device 80 is connected in series between the outdoor heat exchanger 20 and the first and second heat exchangers. When producing hot water, the water tank 90 is connected in parallel with the outdoor heat exchanger 20. The first and second heat exchangers are arranged sequentially along the airflow direction. When cooling, the first and second heat exchangers are connected in parallel, with their outlets connected to the first and second suction ports, respectively, and their inlets connected sequentially to the liquid storage device 80, the outdoor heat exchanger 20, and the compressor discharge port 11. When regulating temperature and dehumidifying, the second indoor heat exchanger 42 is connected in parallel with the outdoor heat exchanger 20, with its inlet connected to the compressor discharge port 11, and its outlet connected sequentially to the first indoor heat exchanger 41 and the first and second suction ports.

[0130] 2. The air conditioner also has a main four-way reversing valve (first four-way valve 51) and a dehumidifying four-way valve (second four-way valve 52). The D port of the first four-way valve is connected to the discharge port 11 of the compressor 10, the S port is connected to the first suction port 12 of the compressor, the C port is connected to the outdoor heat exchanger 20, and the E port is connected to the first indoor heat exchanger 41 to achieve switching between different operating modes. The D pipe of the second four-way reversing valve is connected to the discharge port of the compressor 10, the S pipe is connected to the second suction port 13 of the compressor, the E pipe is connected to the second indoor heat exchanger 42, and the C pipe is connected to the refrigerant inlet 93 of the water tank 90.

[0131] 3. The air conditioner also has a solenoid valve (control valve 70). The solenoid valve is connected in series between the S port of the second four-way valve 52 and the first suction port 12 of the compressor 10.

[0132] 4. The air conditioner also includes a first throttling device 31, a second throttling device 32, a third throttling device 33, and a fourth throttling device 34. The first throttling device 31 is connected in series between the outdoor heat exchanger 20 and the liquid storage device 80; the second throttling device 32 is connected in series between the liquid storage device 80 and the first indoor heat exchanger 41; the third throttling device 33 is connected in series between the liquid storage device 80 and the second indoor heat exchanger 42; and the fourth throttling device 34 is connected in series between the liquid storage device 80 and the water tank 90. ​​All throttling devices can be electronic expansion valves, thermostatic expansion valves, throttling short tubes, or capillary tubes.

[0133] 5. The air conditioner of the present invention also has a refrigerant charge adjustment device (liquid storage device 80), which is connected to the first throttling device 31, the second throttling device 32, the third throttling device 33 and the fourth throttling device 34 respectively, and the pipes connected to the charge adjustment device are all inserted into a position close to the bottom (to ensure that liquid refrigerant enters the connecting pipe).

[0134] 6. The air conditioner of the present invention has multiple operating modes (at least 5 functions and 7 modes) such as cooling, heating, temperature control and dehumidification, hot water production, cooling and hot water production at the same time, temperature control and dehumidification and hot water production at the same time, heating and hot water production at the same time, and heat storage and defrosting.

[0135] 7. The air conditioning water heater system of the present invention uses environmentally friendly and efficient refrigerants such as R32 and R290.

[0136] The present invention has the following beneficial effects:

[0137] 1. When dehumidification is required during the transition season, this invention enables the indoor evaporator on the windward side to dehumidify and cool the return air by switching the function valve, while the indoor heat exchanger on the leeward side becomes a condenser and is connected in parallel with the outdoor condenser. The refrigerant flow distribution is regulated by the electronic expansion valves connected in series on their respective outlet pipes, thereby realizing the distribution of condensing load and the regulation of indoor outlet air temperature, significantly improving comfort and reducing energy consumption.

[0138] 2. This invention achieves stepped cooling and dehumidification of the return air by arranging two heat exchangers in parallel on the indoor side and connecting them to the two suction ports of the compressor, respectively. This results in two different evaporation temperatures during cooling operation. The indoor return air flows sequentially through the two heat exchangers with high and low evaporation temperatures, thereby reducing irreversible losses in the heat exchange process, improving the cooling efficiency ratio and the dehumidification capacity per unit energy consumption.

[0139] 3. This invention, by incorporating a static water tank and corresponding switching valves, enables the system to effectively produce hot water to meet domestic hot water demand in any operating mode, fully recovers the condensing heat of the air conditioner, improves energy efficiency, and reduces the additional cost of producing domestic hot water, making it economical and environmentally friendly.

[0140] 4. The integrated air conditioner and water heater system of the present invention activates the heat storage defrosting mode during winter defrosting. The heat storage defrosting can shorten the defrosting time of the low temperature heating mode, reduce indoor temperature fluctuations, and improve the comfort of users operating in low temperature heating mode.

[0141] 5. By installing a refrigerant liquid storage device, efficient operation in different modes can be achieved;

[0142] 6. The multi-functional air conditioning system described in this invention is relatively simple, reliable, and low in cost.

[0143] like Figure 1-9 The air conditioning and hot water unit with temperature control and dehumidification functions of the present invention shown includes a compressor 10, an outdoor heat exchanger 20, a first throttling device 31, a second throttling device 32, a third throttling device 33 and a fourth throttling device 34, a first indoor heat exchanger 41, a second indoor heat exchanger 42, a first four-way valve 51, a second four-way valve 52, a control valve 70 (preferably a solenoid valve), an outdoor fan 61, an indoor fan 62, a water tank 90, and a liquid storage device 80 for adjusting the refrigerant charge.

[0144] The compressor 10 of the present invention has two compression cylinders and two suction ports: a first suction port 12 and a second suction port 13. The two compression cylinders share a single exhaust port 11, and the exhaust gases are mixed and discharged. The D pipe of the first four-way valve 51 is connected to the exhaust port 11 of the compressor, the C pipe is connected to one end of the outdoor heat exchanger 20, the S pipe is connected to the first suction port 12 of the compressor, and the E pipe is connected to one end of the first indoor heat exchanger 41. The D pipe of the second four-way valve 52 is connected to the exhaust port 11 of the compressor, the E pipe is connected to one end of the second indoor heat exchanger 42, the S pipe is connected to the second suction port 13 of the compressor, the C pipe is connected to the refrigerant inlet 93 of the water tank 90, and the control valve 70 is connected to the first suction pipe (third pipe 103) and the second suction pipe (tenth pipe 110) of the compressor.

[0145] The exhaust port of the compressor 10 of this invention is connected to the D pipe of the first four-way valve 51 and the D pipe of the second four-way valve 52, respectively, and the suction port is connected to the S pipe of the first four-way valve 51 and the second four-way valve 52, respectively. The C pipe of the first four-way valve 51 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 31. The liquid storage device 80 for adjusting the refrigerant charge has three connecting pipe interfaces that are respectively connected to four 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 32 and the first four-way valve 51, and the second indoor heat exchanger is connected to the third throttling device 33 and the E pipe of the second four-way valve, respectively. The refrigerant circulation pipeline of the water tank is connected to the C pipe of the second four-way valve 52 and the fourth throttling device 34, respectively. This invention enables various operating modes, such as individual cooling, heating, dehumidification, hot water production, cooling + hot water production, heating + hot water production, dehumidification + hot water production, heat storage defrosting, and conventional defrosting, through the control of the throttling device, the first and second four-way valves, and the control valve.

[0146] In some implementations...

[0147] It also includes an auxiliary compression cylinder and a fourteenth pipeline 114. The auxiliary compression cylinder has a third intake port 14, which is connected to the upper interior of the liquid storage device 80 through the fourteenth pipeline 114. The gas discharged from the auxiliary compression cylinder is mixed with the gas discharged from the first cylinder and the gas discharged from the second cylinder in the housing of the compressor and discharged through the first pipeline 101 and / or the ninth pipeline 109.

[0148] 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 80 in the main embodiment system also serves as a flash evaporator in this embodiment. The suction port of the auxiliary compression cylinder is connected to the liquid storage device 80 to absorb the refrigerant gas flashed from the liquid storage device 80. 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.

[0149] In some implementations...

[0150] The first indoor heat exchanger 41, the second indoor heat exchanger 42, the second throttling device 32, the third throttling device 33, and the indoor fan 62 constitute at least a portion of the structure of an indoor unit unit. There are multiple indoor unit units, and the first indoor heat exchanger 41 of each indoor unit is connected between the first four-way valve 51 and the liquid storage device 80, and the second indoor heat exchanger 42 of each indoor unit is connected between the second four-way valve 52 and the liquid storage device 80.

[0151] 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 32 and a third throttling device 33), 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 multi-split mode with one unit connected in parallel). 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.

[0152] The present invention also provides a control method for an integrated air conditioning and hot water unit with temperature control and dehumidification functions as described above, wherein:

[0153] When the air conditioning and hot water unit with temperature control and dehumidification function simultaneously includes a first four-way valve 51, a second four-way valve 52, a first throttling device 31, a second throttling device 32, a third throttling device 33, a fourth throttling device 34, and a control valve 70, the control method includes:

[0154] Testing steps, and the required operating modes of the testing system;

[0155] 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;

[0156] The control steps include, according to the requirements of different operating modes, controlling the switching of the first four-way valve 51 and the second four-way valve 52, controlling the opening and closing of the first throttling device 31, the second throttling device 32, the third throttling device 33 and the fourth throttling device 34 and adjusting the opening size, and controlling the opening and closing of the control valve 70.

[0157] 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 two four-way valves 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, heat storage defrosting, and conventional 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 ends of the first and second indoor heat exchangers, 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 liquid storage device... The aforementioned connection method can adapt to the refrigerant circulation volume in 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 not meeting 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 in 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 utilize the condensation heat generated by the refrigeration system for heating water in a cooling + hot water production mode, and can utilize the indoor heat absorbed by dehumidification for hot water production in a dehumidification + hot water production mode. This reduces the system's heat emissions into the environment, lowers thermal pollution, and improves system energy efficiency.

[0158] In some implementations...

[0159] In the control steps, when the required operating mode of the system is cooling mode, the first four-way valve 51 is controlled to connect the first D end D with the first C end C, and simultaneously connect the first E end E with the first S end S. The second four-way valve 52 is controlled to connect the second D end D' with the second C end C', and simultaneously connect the second E end E' with the second S end S'. The fourth throttling device 34 is controlled to close. The first throttling device 31, the second throttling device 32, and the third throttling device 33 are all controlled to open, and the opening degree of the three is controlled to change. The control valve 70 is controlled to close.

[0160] When the required operating mode of the system is heating mode, the first four-way valve 51 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 four-way valve 52 is controlled to connect the second D end D' with the second E end E', and at the same time, the second C end C' with the second S end S'. The fourth throttling device 34 is controlled to close. The first throttling device 31, the second throttling device 32 and the third throttling device 33 are all controlled to open and their opening degrees are controlled to change. The control valve 70 is controlled to close.

[0161] When the required operating mode of the system is temperature control and dehumidification, the first four-way valve 51 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 second four-way valve 52 is controlled to connect the second D end D' with the second E end E', and at the same time, the second C end C' with the second S end S'. The fourth throttling device 34 is controlled to close. The first throttling device 31, the second throttling device 32 and the third throttling device 33 are all controlled to open and the opening degree of the three is controlled to change. The control valve 70 is also controlled to open.

[0162] When the required operating mode of the system is cooling + hot water mode, the first four-way valve 51 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 second four-way valve 52 is controlled to connect the second D end D' with the second C end C', and at the same time, the second E end E' with the second S end S'. The first throttling device 31 is closed, and the second throttling device 32, the third throttling device 33 and the fourth throttling device 34 are all opened and their opening degrees are controlled to change, which can adjust the liquid level in the liquid storage device 80 and control the control valve 70 to close.

[0163] When the required operating mode of the system is heating + hot water production mode, the first four-way valve 51 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 four-way valve 52 is controlled to connect the second D end D' with the second C end C', and at the same time, the second E end E' with the second S end S'. The third throttling device 33 is closed. The first throttling device 31, the second throttling device 32 and the fourth throttling device 34 are all opened and their opening degrees are controlled to change, which can adjust the liquid level in the liquid storage device 80 and control the control valve 70 to open.

[0164] like Figure 1 As shown, when operating only in cooling mode, both the first four-way valve 51 and the second four-way valve 52 are de-energized, the solenoid valve (control valve 70) is closed, and the fourth throttling device 34 (preferably an electronic expansion valve) is closed. At this time, the hot water storage tank does not operate. Figure 1As shown. Both the first four-way valve 51 and the second four-way valve 52 have D-pipe and C-pipe connected, and S-pipe and E-pipe connected. The high-temperature and high-pressure refrigerant gas discharged from the compressor enters the outdoor heat exchanger 20 through the D-pipe and C-pipe of the first four-way valve 51. In the outdoor heat exchanger 20, it releases heat and condenses into high-pressure liquid refrigerant. Then, after being throttled and depressurized by the first throttling device 31, it enters the liquid storage device 80 (liquid storage tank). The liquid-phase saturated refrigerant separated from the liquid storage tank is divided into two paths: one path is further throttled and depressurized by the second throttling device 32 and enters the first indoor heat exchanger 41 for evaporation and heat absorption, and then enters the first suction port 12 of the compressor through the E-end and S-end of the first four-way valve 51; the other path is further throttled and depressurized by the third throttling device 33 and enters the second indoor heat exchanger 42. After heat exchange, it enters the second suction port 13 of the compressor through the E- and S-pipes of the second four-way valve 52. The refrigerant entering the first and second suction ports of the compressor is compressed in its respective compressor cylinder and then discharged mixed with the exhaust gas, thus completing the entire refrigeration cycle.

[0165] In this mode, the first indoor heat exchanger 41 and the second indoor heat exchanger 42 serve as a high-temperature evaporator and a low-temperature evaporator, respectively. The high-temperature evaporator is mainly responsible for the sensible heat load, while the low-temperature evaporator is mainly responsible for the latent heat load. The evaporation process involves cascade heat exchange, which reduces the heat exchange temperature difference, reduces irreversible losses in the heat exchange process, and improves the system energy efficiency.

[0166] When the air conditioner of this invention is running in cooling mode, and all four throttling devices are electronic expansion valves, adjusting the opening degree of the electronic expansion valve, the frequency of the compressor, and the speed of the first and second fans can achieve the adjustment of cooling capacity and dehumidification capacity, as well as energy-saving optimization, and can achieve the control of return air temperature and humidity.

[0167] like Figure 2As shown, when operating only in heating mode, both the first four-way valve 51 and the second four-way valve 52 are energized, the fourth throttling device 34 is closed, the water tank is not working, and the solenoid valve (control valve 70) is open. Both the first four-way valve 51 and the second four-way valve 52 have their D and E pipes open, and their C and S pipes open. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 is divided into two paths. One path enters the first indoor heat exchanger 41 through the D and E pipes of the first four-way valve 51, condensing and releasing heat to become liquid. It then passes through the second throttling device 32, where its pressure is reduced, and enters the liquid storage device 80. The other path enters the second indoor heat exchanger 42 through the D and E pipes of the second four-way valve 52, condensing and releasing heat to become liquid. It then passes through the third throttling device 33, where its pressure is reduced, and enters the liquid storage device 80. The liquid-phase saturated refrigerant exiting the liquid storage device 80 is further throttled and depressurized by the first throttling device 31 before entering the outdoor heat exchanger 20, where it evaporates and absorbs heat to become gaseous. The gaseous refrigerant passes through the C and S pipes of the first four-way valve 51, and then splits into two paths. One path directly enters the first suction port 12 of the compressor 10, and the other path passes through the control valve 70 to enter the second suction port 13 of the compressor. After the refrigerant entering the first and second suction ports of the compressor is compressed in its respective compression cylinder, the exhaust gas is mixed and discharged, thus completing the entire heating cycle.

[0168] like Figure 3 As shown, when only the temperature and humidity control mode is running, the first four-way valve 51 is de-energized, the second four-way valve 52 is energized, the fourth throttling device 34 is closed, the water tank does not work, and the control valve 70 is open. The D and C pipes of the first four-way valve 51 are connected, and the E and S pipes are connected. The D and E pipes of the second four-way valve 52 are connected, and the S and C pipes are connected. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor is divided into two paths. One path enters the outdoor heat exchanger 20 through the D and C pipes of the first four-way valve 51 for heat exchange, condenses and releases heat to become liquid refrigerant, and then enters the liquid receiver 80 after being throttled and depressurized by the first throttling device 31. The other path of refrigerant discharged from the compressor enters the second indoor heat exchanger 42 through the D and E pipes of the second four-way valve 52 for heat exchange, condenses and releases heat to become liquid refrigerant, and then mixes with the liquid-phase saturated refrigerant from the liquid receiver 80 after being throttled and depressurized by the third throttling device 33. The mixed refrigerant then enters the first indoor heat exchanger 41 through the second throttling device 32 for further throttling and depressurization, where it evaporates and absorbs heat to become gaseous. This gaseous refrigerant then enters the first four-way valve 51 through the E and S pipes, and is subsequently divided into two paths. One path is directly drawn into the first suction port 12 of the compressor, and the other path passes through the control valve 70 to enter the second suction port 13 of the compressor. After the refrigerant entering the first and second suction ports of the compressor is compressed in its respective compression cylinder, the exhaust mixture is discharged, thus completing the entire temperature regulation and dehumidification cycle.

[0169] When the air conditioning temperature and dehumidification mode of the present invention is running, if all four throttling devices are electronic expansion valves, the opening degree of the electronic expansion valves can be adjusted to distribute the refrigerant flow between the outdoor heat exchanger 20 and the second indoor heat exchanger 42. Combined with the adjustment of the compressor frequency and the speed of the first and second fans, the indoor dehumidification capacity and outlet air temperature can be adjusted and the energy-saving operation optimized. The return air temperature and humidity can also be controlled.

[0170] In this mode, air dehumidification is achieved without cooling by switching valves. The first indoor heat exchanger 41 acts as a separate evaporator to cool and dehumidify the indoor air, while the second indoor heat exchanger 42 acts as a low-temperature condenser to reheat the cooled and dehumidified air, thereby increasing the supply air temperature and improving the comfort of the indoor environment.

[0171] like Figure 4 As shown, when operating only in hot water mode, the first four-way valve 51 is energized, the second four-way valve 52 is de-energized, the second throttling device 32 and the third throttling device 33 are closed, and the control valve 70 is open. Pipes D and E of the first four-way valve 51 are connected, as are pipes C and S. Pipes D and C of the second four-way valve 52 are connected, as are pipes E and S. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 enters the water tank 90 through pipes D and E of the second four-way valve 52. The high-temperature, high-pressure refrigerant releases heat in the water tank, becoming a high-pressure subcooled liquid. It then passes through the fourth throttling device 34, where its pressure is reduced, and enters the liquid storage device 80. The saturated liquid refrigerant exiting the liquid storage tank passes through the first throttling device 31, where its pressure is reduced, and then enters the outdoor heat exchanger 20, where it evaporates and absorbs heat to become gaseous. Gaseous refrigerant passes through the C and S pipes of the first four-way valve 51, and then splits into two paths. One path directly enters the first suction port 12 of the compressor 10, and the other path passes through the control valve 70 to enter the second suction port 13 of the compressor. After the refrigerant entering the first and second suction ports of the compressor is compressed in its respective compressor cylinder, the exhaust gas is mixed and discharged, thus completing the entire hot water cycle. On the water circulation side, the water in the water tank exchanges heat with the high-temperature and high-pressure refrigerant discharged from the compressor, and the water is heated to the target temperature. Then, it is sent to the user end from the water tank outlet 92. The water tank inlet 91 is connected to the water pipeline network, so that the water in the water tank is maintained at a certain water level.

[0172] like Figure 5As shown, in the cooling + hot water mode, both the first four-way valve 51 and the second four-way valve 52 are de-energized, the first throttling device 31 is closed, the hot water storage tank is working, and the control valve 70 is closed. The D and C pipes of the first four-way valve 51 and the second four-way valve 52 are connected, as are the S and E pipes. The high-temperature, high-pressure refrigerant gas discharged from compressor 10 enters water tank 90 through pipes D and E of the second four-way valve 52 to exchange heat with water. In water tank 90, it releases heat and condenses into high-pressure, subcooled liquid refrigerant. Subsequently, it is throttled and depressurized by the fourth throttling device 34 and enters liquid storage device 80. The liquid saturated refrigerant separated from liquid storage device 80 is divided into two paths: one path is further throttled and depressurized by the second throttling device 32 and enters the first indoor heat exchanger 41 for evaporation and heat absorption, then enters the first suction port 12 of compressor through ends E and S of the first four-way valve 51; the other path is further throttled and depressurized by the third throttling device 33 and enters the second indoor heat exchanger 42. After heat exchange, it enters the second suction port 13 of compressor through pipes E and S of the second four-way valve 52. The refrigerant entering the first and second suction ports of compressor is compressed in its respective compressor cylinder and then discharged mixed with the exhaust gas, thus completing the entire refrigerant cycle. On the water circulation side, the water in the water tank exchanges heat with the high-temperature and high-pressure refrigerant discharged by the compressor, and the water is heated to the target temperature. Then it is sent to the user end from the water tank outlet 92. The water tank inlet 91 is connected to the water pipeline network, so that the water in the water tank is kept at a certain level.

[0173] In this mode, the water tank 90 is equivalent to a condenser, and since the first throttling device 31 is closed, the outdoor heat exchanger 20 does not work, and the hot water produced can meet the domestic water demand, which is energy-saving and environmentally friendly.

[0174] like Figure 6As shown, when operating in heating mode to produce hot water, the first four-way valve 51 is energized, the second four-way valve 52 is de-energized, the third throttling device 33 is closed, and the control valve 70 is open. The first four-way valve 51 connects pipes D and E, and pipes C and S; the second four-way valve 52 connects pipes D and C, and pipes S and E. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 is divided into two paths. One path enters the first indoor heat exchanger 41 through pipes D and E of the first four-way valve 51, condensing and releasing heat into a liquid state. After being throttled and depressurized by the second throttling device 32, it enters the liquid storage device 80. The other path enters the water tank 90 through pipes D and C of the second four-way valve 52, exchanging heat with the water in the tank and heating it. After heat exchange, it is throttled and depressurized by the fourth throttling device 34 before entering the liquid storage device 80. The liquid-phase saturated refrigerant from the liquid storage device 80 is further throttled and depressurized by the first throttling device 31 before entering the outdoor heat exchanger 20 to evaporate and absorb heat into a gaseous state. The gaseous refrigerant then passes through the C and S pipes of the first four-way valve 51 and is subsequently divided into two paths: one path directly enters the first suction port 12 of the compressor 10, and the other path passes through the control valve 70 to enter the second suction port 13 of the compressor. After the refrigerant entering the first and second suction ports of the compressor is compressed in its respective compressor cylinder, the exhaust gases are mixed and discharged, thus completing the entire heating + hot water production cycle.

[0175] The schematic diagrams for the standard defrosting operation mode and the cooling operation mode are the same, as follows: Figure 1 As shown.

[0176] This invention controls the switching of the four-way valve, three-way valve, and 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 unit with temperature control and dehumidification functions of this invention uses environmentally friendly and efficient refrigerants such as R32 and R290.

[0177] In some implementations...

[0178] 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.

[0179] In the control steps, if it is a single hot water mode, the first four-way valve 51 is controlled to connect the first D end D with the first E end E, and the first C end C with the first S end S. The second four-way valve 52 is controlled to connect the second D end D' with the second C end C', and the second E end E' with the second S end S'. The second throttling device 32 and the third throttling device 33 are both closed. The first throttling device 31 and the fourth throttling device 34 are controlled to open and their opening degrees are controlled to change. The control valve 70 is also controlled to open.

[0180] like Figure 4When operating in single-system hot water mode, the first four-way valve 51 is energized, the second four-way valve 52 is de-energized, the second throttling device 32 and the third throttling device 33 are closed, and the control valve 70 is open. Pipes D and E of the first four-way valve 51 are connected, as are pipes C and S. Pipes D and C of the second four-way valve 52 are connected, as are pipes E and S. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 enters the water tank 90 through pipes D and E of the second four-way valve 52. The high-temperature, high-pressure refrigerant releases heat in the water tank, becoming a high-pressure subcooled liquid. It then passes through the fourth throttling device 34, where its pressure is reduced, and enters the liquid storage device 80. The saturated liquid refrigerant exiting the liquid storage tank passes through the first throttling device 31, where its pressure is reduced, and then enters the outdoor heat exchanger 20, evaporating and absorbing heat to become gaseous. Gaseous refrigerant passes through the C and S pipes of the first four-way valve 51, and then splits into two paths. One path directly enters the first suction port 12 of the compressor 10, and the other path passes through the control valve 70 to enter the second suction port 13 of the compressor. After the refrigerant entering the first and second suction ports of the compressor is compressed in its respective compressor cylinder, the exhaust gas is mixed and discharged, thus completing the entire hot water cycle. On the water circulation side, the water in the water tank exchanges heat with the high-temperature and high-pressure refrigerant discharged from the compressor, and the water is heated to the target temperature. Then, it is sent to the user end from the water tank outlet 92. The water tank inlet 91 is connected to the water pipeline network, so that the water in the water tank is maintained at a certain water level.

[0181] When the air conditioner of this invention produces hot water, if all four throttling devices are electronic expansion valves, adjusting the opening of the first and fourth throttling devices distributes the refrigerant flow between the water tank 90 and the outdoor heat exchanger 20, thereby regulating the supply water temperature.

[0182] In some implementations...

[0183] 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.

[0184] If the defrost mode is in use, the detection steps also include detecting the water temperature in the water tank;

[0185] When the water temperature is greater than or equal to the preset value, the system controls the execution of the heat storage defrosting operation mode. The first four-way valve 51 is controlled to connect the first D end D with the first C end C, and simultaneously connect the first E end E with the first S end S. The second four-way valve 52 is controlled to connect the second D end D' with the second E end E', and simultaneously connect the second C end C' with the second S end S'. The second throttling device 32 and the third throttling device 33 are both closed. The first throttling device 31 and the fourth throttling device 34 are controlled to open and their opening degrees are controlled to change. The control valve 70 is also controlled to open.

[0186] When the water temperature is less than the second preset value, the system controls the execution of the normal defrosting mode. The first four-way valve 51 is controlled to connect the first D end D with the first C end C, and simultaneously connect the first E end E with the first S end S. The second four-way valve 52 is controlled to connect the second D end D' with the second C end C', and simultaneously connect the second E end E' with the second S end S'. The fourth throttling device 34 is closed. The first throttling device 31, the second throttling device 32, and the third throttling device 33 are all opened, and the opening degree of the three is controlled to change. The control valve 70 is closed.

[0187] In the judgment step, if it is determined that the mode is neither cooling mode, nor heating mode, nor hot water mode, nor defrosting mode, the control step controls the air conditioning and hot water unit with temperature control and dehumidification function to stop.

[0188] like Figure 7 As shown, during the operation of the heat storage defrost mode, the first four-way valve 51 is de-energized, the second four-way valve 52 is energized, the second throttling device 32 and the third throttling device 33 are both closed, and the control valve 70 is open. The D and C pipes of the first four-way valve 51 are connected, and the S and E pipes are connected. The D and E pipes of the second four-way valve 52 are connected, and the C and S terminals are connected. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 enters the outdoor heat exchanger 20 through the D and C pipes of the first four-way valve 51 for heat exchange, condenses and releases heat to become liquid refrigerant, and then enters the liquid storage device 80 after being throttled and depressurized by the first throttling device 31. The liquid-saturated refrigerant in the liquid storage device 80 enters the heat storage water tank 90 after being throttled and depressurized by the fourth throttling device 34 to absorb heat. After heat exchange, it is then divided into two paths through the C and S pipes of the second four-way valve 52: one path directly enters the second suction port 13 of the compressor, and the other path enters the first suction port 12 of the compressor through the control valve 70. After the refrigerant entering the first and second suction ports of the compressor is compressed in its respective compression cylinder, it is discharged mixed with the exhaust gas, thus completing the entire heat storage defrosting mode cycle.

[0189] In this mode, the system mainly absorbs heat from the heat storage tank 90 to complete the heat storage defrosting process. Compared with the traditional defrosting process, the defrosting is faster and more stable due to the presence of the heat storage tank, shortening the defrosting cycle. By utilizing the heat stored in the tank, the system has high energy efficiency.

[0190] like Figure 1 As shown, during normal defrosting mode operation, both the first four-way valve 51 and the second four-way valve 52 are de-energized, the solenoid valve (control valve 70) is closed, and the fourth throttling device 34 (preferably an electronic expansion valve) is closed. At this time, the hot water storage tank does not operate. Figure 1As shown. Both the first four-way valve 51 and the second four-way valve 52 have D-pipe and C-pipe connected, and S-pipe and E-pipe connected. The high-temperature and high-pressure refrigerant gas discharged from the compressor enters the outdoor heat exchanger 20 through the D-pipe and C-pipe of the first four-way valve 51. In the outdoor heat exchanger 20, it releases heat and condenses into high-pressure liquid refrigerant. Then, after being throttled and depressurized by the first throttling device 31, it enters the liquid storage device 80 (liquid storage tank). The liquid-phase saturated refrigerant separated from the liquid storage tank is divided into two paths: one path is further throttled and depressurized by the second throttling device 32 and enters the first indoor heat exchanger 41 for evaporation and heat absorption, and then enters the first suction port 12 of the compressor through the E-end and S-end of the first four-way valve 51; the other path is further throttled and depressurized by the third throttling device 33 and enters the second indoor heat exchanger 42. After heat exchange, it enters the second suction port 13 of the compressor through the E- and S-pipes of the second four-way valve 52. The refrigerant entering the first and second suction ports of the compressor is compressed in its respective compressor cylinder and then discharged mixed with the exhaust gas, thus completing the entire refrigeration cycle.

[0191] In this mode, the first indoor heat exchanger 41 and the second indoor heat exchanger 42 serve as a high-temperature evaporator and a low-temperature evaporator, respectively. The high-temperature evaporator is mainly responsible for the sensible heat load, while the low-temperature evaporator is mainly responsible for the latent heat load. The evaporation process involves cascade heat exchange, which reduces the heat exchange temperature difference, reduces irreversible losses in the heat exchange process, and improves the system energy efficiency.

[0192] 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 unit with temperature control and dehumidification functions, characterized in that: include: The system comprises a compressor (10), an outdoor heat exchanger (20), a first indoor heat exchanger (41), a second indoor heat exchanger (42), a water tank (90), and a liquid storage device (80). The discharge end of the compressor (10) is connected to one end of the outdoor heat exchanger (20), one end of the first indoor heat exchanger (41), or one end of the water tank (90). The other end of the outdoor heat exchanger (20) is connected to the interior of the liquid storage device (80), and the other end of the first indoor heat exchanger (41) is connected to the liquid storage device. Inside the container (80), one end of the second indoor heat exchanger (42) can be connected to the exhaust end or suction end of the compressor (10), the other end of the second indoor heat exchanger (42) can be connected to the interior of the liquid storage device (80), the other end of the water tank (90) can be connected to the interior of the liquid storage device (80), and the suction end of the compressor (10) can be connected to one end of the outdoor heat exchanger (20), or to one end of the first indoor heat exchanger (41), or to one end of the water tank (90); The other end of the first indoor heat exchanger (41) is connected to the interior of the liquid storage device (80) through the sixth pipe (106), and the other end of the second indoor heat exchanger (42) is connected to the interior of the liquid storage device (80) through the seventh pipe (107). A second throttling device (32) is provided on the sixth pipe (106), and a third throttling device (33) is provided on the seventh pipe (107). It also includes a first four-way valve (51), which includes a first D end (D), a first C end (C), a first S end (S), and a first E end (E). The first four-way valve (51) 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 (10) through the first pipe (101), the first C end (C) is connected to one end of the outdoor heat exchanger (20) through the second pipe (102), the first S end (S) is connected to the suction end of the compressor (10) through the third pipe (103), and the first E end (E) is connected to one end of the first indoor heat exchanger (41) through the fourth pipe (104). The other end of the outdoor heat exchanger (20) is connected to the interior of the liquid storage device (80) through the fifth pipe (105), and the other end of the water tank (90) is connected to the interior of the liquid storage device (80) through the eighth pipe (108). The fifth pipeline (105) is provided with a first throttling device (31), the eighth pipeline (108) is provided with a fourth throttling device (34), and the first indoor heat exchanger (41) and the second indoor heat exchanger (42) are arranged on the same airflow path in the room; It also includes a second four-way valve (52), which includes a second D end (D'), a second C end (C'), a second S end (S'), and a second E end (E'). The second four-way valve (52) can switch between the following two connection states: In the first state, the second D end (D') is connected to the second C end (C'), and the second S end (S') is connected to the second E end (E'); In the second state, the second D end (D') is connected to the second E end (E'), and the second C end (C') is connected to the second S end (S'). The second D end (D') is connected to the exhaust end of the compressor (10) through the ninth pipe (109), the second S end (S') is connected to the suction end of the compressor (10) through the tenth pipe (110), the second C end (C') is connected to one end of the water tank (90) through the eleventh pipe (111), and the second E end (E') is connected to one end of the second indoor heat exchanger (42) through the twelfth pipe (112). The eleventh pipe (111) contacts the water tank (90) through a refrigerant pipe and exchanges heat with the water in the water tank (90). One end of the water tank (90) is one end of the refrigerant pipe, and the other end of the water tank (90) is the other end of the refrigerant pipe. The other end of the refrigerant pipe is connected to the eighth pipe (108). The refrigerant pipe forms at least a part of the structure of the water tank heat exchanger. The compressor includes a first cylinder and a second cylinder. The first cylinder has a first intake port (12), and the second cylinder has a second intake port (13). The first S end (S) of the first four-way valve (51) is connected to the first intake port (12) of the first cylinder through the third pipeline (103), and the second S end (S') of the second four-way valve (52) is connected to the second intake port (13) of the second cylinder through the tenth pipeline (110). It also includes a thirteenth pipeline (113), one end of which is connected to the third pipeline (103), and the other end of which is connected to the tenth pipeline (110). A control valve (70) is provided on the thirteenth pipeline (113).

2. The air conditioning and hot water integrated unit with temperature control and dehumidification function according to claim 1, characterized in that: The fifth pipe (105) is connected to the first end of the liquid storage device (80), which is a distance higher than the first height of the inner bottom surface of the liquid storage device (80). The sixth pipe (106) and the seventh pipe (107) merge and are connected to the liquid storage device (80). The end of the merged pipe that is connected to the inside of the liquid storage device (80) is a second end, which is a distance higher than the second height of the inner bottom surface of the liquid storage device (80). The eighth pipe (108) is connected to the liquid storage device (80). One end inside the liquid storage device (80) is the third end, which is a distance higher than the third height of the inner bottom surface of the liquid storage device (80). The distance between the first end and the top of the liquid storage device (80) is the fourth height, which is greater than the first height. The distance between the second end and the top of the liquid storage device (80) is the fifth height, which is greater than the second height. The distance between the third end and the top of the liquid storage device (80) is the sixth height, which is greater than the third height.

3. The air conditioning and hot water integrated unit with temperature control and dehumidification function according to claim 2, characterized in that: The liquid storage device (80) has a middle height dividing line at half the height, the first end is at a distance of a 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 an eighth height from the middle height dividing line and the eighth height is greater than the second height, and the third end is at a distance of a ninth height from the middle height dividing line and the ninth height is greater than the third height.

4. The air conditioning and hot water integrated unit with temperature control and dehumidification function according to claim 1, characterized in that: It also includes an indoor fan (62) and an outdoor fan (61), the outdoor fan (61) being opposite to the outdoor heat exchanger (20) to drive airflow to exchange heat with the refrigerant in the outdoor heat exchanger (20), the indoor fan (62), the first indoor heat exchanger (41) and the second indoor heat exchanger (42) being located on the same airflow path, along the airflow direction, the second indoor heat exchanger (42) being located downstream of the first indoor heat exchanger (41), and the indoor fan (62) being located upstream of the first indoor heat exchanger (41) or downstream of the second indoor heat exchanger (42).

5. The air conditioning and hot water integrated unit with temperature control and dehumidification function according to claim 1, characterized in that: It also includes an auxiliary compression cylinder and a fourteenth pipeline (114). The auxiliary compression cylinder has a third suction port (14), which is connected to the upper interior of the liquid storage device (80) through the fourteenth pipeline (114). The gas discharged from the auxiliary compression cylinder is mixed with the gas discharged from the first cylinder and the gas discharged from the second cylinder in the housing of the compressor and discharged through the first pipeline (101) and / or the ninth pipeline (109).

6. The air conditioning and hot water integrated unit 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 (32), the third throttling device (33), and the indoor fan (62) constitute at least part of the structure of a set of indoor unit units. There are multiple indoor unit units, and the first indoor heat exchanger (41) of each indoor unit is connected between the first four-way valve (51) and the liquid storage device (80), and the second indoor heat exchanger (42) of each indoor unit is connected between the second four-way valve (52) and the liquid storage device (80).

7. A control method for an integrated air conditioning and hot water unit with temperature control and dehumidification function as described in any one of claims 1-6, 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, according to the needs of different operating modes, control the switching of the first four-way valve (51) and the second four-way valve (52), as well as control the opening and closing of the first throttling device (31), the second throttling device (32), the third throttling device (33) and the fourth throttling device (34) and adjust the opening size, and control the opening and closing of the control valve (70).

8. The control method according to claim 7, characterized in that: In the control steps, when the required operating mode of the system is the cooling mode, the first four-way valve (51) 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 second four-way valve (52) is controlled to connect the second D end (D') with the second C end (C'), and at the same time, the second E end (E') is connected with the second S end (S'). The fourth throttling device (34) is controlled to close. The first throttling device (31), the second throttling device (32) and the third throttling device (33) are all controlled to open and the opening degree of the three is controlled to change. The control valve (70) is controlled to close. When the required operating mode of the system is heating mode, the first four-way valve (51) is controlled to connect the first D end (D) with the first E end (E) and the first C end (C) with the first S end (S). The second four-way valve (52) is controlled to connect the second D end (D') with the second E end (E') and the second C end (C') with the second S end (S'). The fourth throttling device (34) is controlled to close. The first throttling device (31), the second throttling device (32) and the third throttling device (33) are all controlled to open and the opening degree of the three is controlled to change. The control valve (70) is controlled to close. When the required operating mode of the system is temperature control and dehumidification mode, the first four-way valve (51) 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 second four-way valve (52) is controlled to connect the second D end (D') with the second E end (E'), and at the same time the second C end (C') is connected with the second S end (S'). The fourth throttling device (34) is controlled to close. The first throttling device (31), the second throttling device (32) and the third throttling device (33) are all controlled to open and the opening size of the three is controlled to change. The control valve (70) is controlled to open. When the required operating mode of the system is cooling + hot water mode, the first four-way valve (51) is controlled to connect the first D end (D) with the first C end (C) and the first E end (E) with the first S end (S). The second four-way valve (52) is controlled to connect the second D end (D') with the second C end (C') and the second E end (E') with the second S end (S'). The first throttling device (31) is closed, and the second throttling device (32), the third throttling device (33) and the fourth throttling device (34) are all opened and their opening degrees are controlled to change, which can adjust the liquid level in the liquid storage device (80) and control the control valve (70) to close. When the required operating mode of the system is heating + hot water mode, the first four-way valve (51) 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 four-way valve (52) is controlled to connect the second D end (D') with the second C end (C'), and at the same time the second E end (E') is connected with the second S end (S'). The third throttling device (33) is closed. The first throttling device (31), the second throttling device (32) and the fourth throttling device (34) are all opened and their opening size is controlled to change, which can adjust the liquid level in the liquid storage device (80) and control the control valve (70) to open.

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 first four-way valve (51) is controlled to connect the first D end (D) with the first E end (E) and the first C end (C) with the first S end (S). The second four-way valve (52) is controlled to connect the second D end (D') with the second C end (C') and the second E end (E') with the second S end (S'). The second throttling device (32) and the third throttling device (33) are both closed. The first throttling device (31) and the fourth throttling device (34) are controlled to open and their opening degrees are controlled to change. The control valve (70) is also controlled to open.

10. 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, nor a single hot water mode, then determines whether it is a defrosting mode. If the defrost mode is in use, the detection steps also include detecting the water temperature in the water tank; When the water temperature is ≥ the preset value, the heat storage defrosting operation mode is executed. The first four-way valve (51) 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 second four-way valve (52) is controlled to connect the second D end (D') with the second E end (E'), and at the same time, the second C end (C') is connected with the second S end (S'). The second throttling device (32) and the third throttling device (33) are both closed. The first throttling device (31) and the fourth throttling device (34) are controlled to open and the opening degree of the two is controlled to change. The control valve (70) is also controlled to open. When the water temperature is less than the second preset value, the system controls the execution of the normal defrosting operation mode, controls the first four-way valve (51) 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), controls the second four-way valve (52) to connect the second D end (D') with the second C end (C'), and at the same time connect the second E end (E') with the second S end (S'), and controls the fourth throttling device (34) to close, controls the first throttling device (31), the second throttling device (32) and the third throttling device (33) to open and controls the opening size of the three to change, and controls the control valve (70) to close; In the judgment step, if it is determined that the mode is neither cooling mode, nor heating mode, nor hot water mode, nor defrosting mode, the control step controls the air conditioning and hot water unit with temperature control and dehumidification function to stop.

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