Air conditioner and hot water integrated system with temperature control and dehumidification functions

Abstract

The utility model provides an air conditioner and hot water integrated system with temperature control and dehumidification functions, which 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 other end of the second indoor heat exchanger communicates with one end of the first indoor heat exchanger, and the other end of the outdoor heat exchanger, the other end of the first indoor heat exchanger and the other end of the water tank communicate with the interior of the liquid storage device. The air suction end of the compressor can communicate with one end of the outdoor heat exchanger or one end of the second indoor heat exchanger or one end of the water tank. According to the utility model, the modes of refrigeration and water heating, heating and water heating and dehumidification and water heating can be realized at the same time, the system can also adapt to the refrigerant circulation amount in different modes, the problem of high power consumption is solved, the problem that the requirement of comfort cannot be met is solved, and the system runs efficiently.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an integrated air conditioning and hot water system with temperature control and dehumidification functions. Background Art

[0002] Household inverter air conditioners are now widely used in my country, serving both cooling and dehumidification in the summer and heating in the winter. To meet dehumidification requirements, the air conditioner's evaporation temperature is typically lower than the return air dew point; however, to maintain comfort, the return air temperature should not be too low. During low-load cooling operation, the evaporation temperature of household inverter air conditioners is typically higher. To achieve both dehumidification and cooling, the indoor unit air volume needs to be reduced, thereby lowering the evaporation temperature. This reduces both the cooling energy efficiency ratio and the dehumidification per unit energy consumed.

[0003] During the transition season (when air conditioning for cooling or heating is not required) in the middle and lower reaches of the Yangtze River and the areas south of it, relative humidity is high. This is particularly true during the plum rain season and the return of the south wind. Dehumidification is therefore necessary to address the comfort and health issues caused by humidity. When conventional household inverter air conditioners cool and dehumidify during the transition season, the indoor return air temperature and return air dew point gradually decrease. Once the indoor relative humidity reaches a certain level, it no longer decreases and may even increase, resulting in a cold but dry indoor environment. Furthermore, the lower evaporation temperature and return air dew point significantly reduce the air conditioner's dehumidification capacity per unit energy consumption. Therefore, during the humid weather of the transition season, conventional household inverter air conditioners are unable to meet the comfort requirements for dehumidification and are often left idle.

[0004] Approximately half of my country's population lives in the middle and lower reaches of the Yangtze River and the region to its south. Summer cooling requirements and the cumulative duration of humid weather during the transitional season are both long, resulting in high cooling and dehumidification demands. Conventional air conditioning systems discharge heat to the outdoors during cooling and temperature control and dehumidification modes. Recovering this heat as hot water can meet domestic hot water needs.

[0005] However, existing household variable-frequency 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 injection amount according to the cooling capacity requirements of different modes, resulting in high power consumption or failure to meet comfort requirements, and unable to achieve efficient operation of the air conditioner.

[0006] Since household variable-frequency air conditioners in the existing technology cannot simultaneously achieve cooling + hot water production, heating + hot water production, and dehumidification + hot water production modes, and cannot adjust the required refrigerant injection amount according to the cooling capacity requirements of different modes, resulting in high power consumption or failure to meet comfort requirements and other technical problems, the utility model studies and designs an integrated air conditioning and hot water system with temperature control and dehumidification functions. Utility Model Content

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the existing technology that household variable-frequency air conditioners cannot simultaneously realize the modes of cooling + hot water making, heating + hot water making, and dehumidification + hot water making, and cannot adjust the required refrigerant filling amount according to the cooling capacity requirements of different modes, resulting in high power consumption or failure to meet comfort requirements, thereby providing an integrated air conditioning and hot water system with temperature control and dehumidification functions.

[0008] In order to solve the above problems, the utility model provides an integrated air conditioning and hot water system with temperature control and dehumidification functions, which includes:

[0009] 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 exhaust end of the compressor can be connected to one end of the outdoor heat exchanger, or to one end of the second indoor heat exchanger, or to one end of the water tank, the other end of the outdoor heat exchanger is connected to the interior of the liquid storage device, the other end of the second indoor heat exchanger is connected to one end of the first indoor heat exchanger, the other end of the first indoor heat exchanger is connected to the interior of the liquid storage device, the other end of the water tank is connected to the interior of the liquid storage device, the suction end of the compressor can be connected to the one end of the outdoor heat exchanger, or to the one end of the second indoor heat exchanger, or to the one end of the water tank.

[0010] In some embodiments,

[0011] The device further includes a four-way valve, the four-way valve including a first D end, a first E end, a first S end, and a first C end. The four-way valve can be switched between the following two communication states: in a first state, the first D end is connected to the first C end, and the first E end is connected to the first S end; in a second state, the first D end is connected to the first E end, and the first C end is connected to the first S end.

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

[0013] In some embodiments,

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

[0015] In some embodiments,

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

[0017] In some embodiments,

[0018] The end of the fifth pipeline connected to the interior of the liquid storage device is the first end, and the first end is higher than the first height of the inner bottom surface of the liquid storage device. The end of the sixth pipeline connected to the interior of the liquid storage device is the second end, and the second end is higher than the second height of the inner bottom surface of the liquid storage device. The end of the seventh pipeline connected to the interior of the liquid storage device is the third end, and the third end is higher than the third height of the inner bottom surface of the liquid storage device. The distance from the first end to the top of the liquid storage device 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 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 is the sixth height, and the sixth height is greater than the third height.

[0019] In some embodiments,

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

[0021] In some embodiments,

[0022] The device further includes a three-way valve, the three-way valve including a second D end, a second S end, and a second C end. The three-way valve can be switched between the following two communication states: in the first state, the second D end is connected to the second C end, and the second S end is blocked; in the second state, the second D end is blocked, and the second C end is connected to the second S end.

[0023] The second D end is connected to the exhaust end of the compressor through the eighth pipeline, the second S end can be connected to the intake end of the compressor through the ninth pipeline, and the second C end can be connected to the one end of the water tank through the tenth pipeline;

[0024] The tenth 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, 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 seventh pipeline, and the refrigerant pipeline forms at least a part of the structure of the water tank heat exchanger;

[0025] It also includes an indoor fan and an outdoor fan, the outdoor fan is opposite to the outdoor heat exchanger to drive the airflow to exchange heat with the refrigerant in the outdoor heat exchanger, the indoor fan is opposite to at least part of the structure of the first indoor heat exchanger, and the indoor fan is also opposite to at least part of the structure of the second indoor heat exchanger to drive the airflow to exchange heat with the refrigerant in the first indoor heat exchanger and the second indoor heat exchanger.

[0026] In some embodiments,

[0027] It also includes an auxiliary compression cylinder, an eleventh pipeline and a twelfth pipeline. The suction end of the auxiliary compression cylinder is connected to the inner upper end of the liquid storage device through the eleventh pipeline, and the exhaust end of the auxiliary compression cylinder is connected to the first pipeline through the twelfth pipeline.

[0028] In some embodiments,

[0029] The first indoor heat exchanger, the second indoor heat exchanger, the second throttling device and the fourth throttling device constitute at least a partial structure of a group of indoor unit units, and there are multiple indoor unit units, and the multiple indoor unit units are connected in parallel with each other.

[0030] The utility model provides an integrated air conditioning and hot water system with temperature control and dehumidification functions, which has the following beneficial effects:

[0031] The utility model is capable of integrating the water tank into a conventional air-conditioning system by arranging a compressor, an outdoor heat exchanger, a first and a second indoor heat exchanger, a water tank and a liquid storage device, as well as the specific connection method mentioned above of the utility model, so as to organically combine the heat pump water heater and the air-conditioning system, and can realize multiple operating modes such as cooling, heating, dehumidification, hot water supply, simultaneous hot water supply for cooling, simultaneous hot water supply for heating, dehumidification + hot water production, heat storage defrosting and conventional defrosting, that is, it can realize the modes of cooling + hot water production, heating + hot water production and dehumidification + hot water production at the same time. The utility model is capable of adaptively adjusting the circulation amount of the refrigerant entering the system for circulation by arranging a liquid storage device, and connecting the other end of the outdoor heat exchanger, the other end of the indoor heat exchanger and the other end of the water tank to the interior of the liquid storage device. Since the circulation amount of the refrigerant is different under multiple operating modes, the circulation amount of the refrigerant is adjusted by adjusting the circulation amount of the refrigerant through the upper end of the liquid storage device. The above-mentioned connection method can adapt to the refrigerant circulation volume in different modes, solves the problem of high power consumption caused by small required refrigerant flow and large actual circulation flow, and solves the problem of unsatisfactory comfort caused by large required refrigerant flow and small actual circulation flow, thereby realizing efficient operation of the system; the utility model shares or partially shares the same set of heat exchanger and piping system in multiple operating modes, which saves initial investment and use costs and improves the comprehensive use efficiency of the system compared with installing air conditioners and heat pump water heaters at the same time. The air-conditioning system of the utility model can also use the condensation heat generated by the refrigeration system to heat hot water (cooling + hot water making mode) when cooling and hot water are running at the same time, and can use the indoor heat absorbed by dehumidification to produce hot water (dehumidification + hot water making mode), which can reduce the heat emission of the system to the environment, reduce thermal pollution and improve the energy efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a flow path diagram of the utility model's integrated air conditioning and hot water system with temperature control and dehumidification functions in cooling and conventional defrosting mode;

[0033] Figure 2 This is a flow path structure diagram of the air conditioning and hot water integrated system with temperature control and dehumidification functions in the heating mode of the utility model;

[0034] Figure 3 This is a flow path structure diagram of the air conditioning and hot water integrated system with temperature control and dehumidification function in the temperature control and dehumidification mode of the utility model;

[0035] Figure 4 This is a flow path structure diagram of the air conditioning and hot water integrated system with temperature control and dehumidification functions in the hot water only mode of the utility model;

[0036] Figure 5 This is a flow path structure diagram of the air conditioning and hot water integrated system with temperature control and dehumidification functions in the cooling + hot water production mode of the utility model;

[0037] Figure 6 This is a flow path structure diagram of the air conditioning and hot water integrated system with temperature control and dehumidification functions of the utility model in the temperature control and dehumidification + hot water production mode;

[0038] Figure 7 This is a flow path structure diagram of the air conditioning and hot water integrated system with temperature control and dehumidification functions in the heating + hot water mode of the utility model;

[0039] Figure 8 This is a flow path structure diagram of the air conditioning and hot water integrated system with temperature control and dehumidification function in the heat storage and defrosting mode of the utility model;

[0040] Figure 9 This is a system structure diagram of an alternative embodiment 1 of the air conditioning and hot water integrated system with temperature control and dehumidification functions of the present invention;

[0041] Figure 10 This is a system structure diagram of alternative embodiment 2 of the integrated air-conditioning and hot water system with temperature control and dehumidification functions of the present invention.

[0042] The reference numerals indicate:

[0043] 1. Compressor; 12. Auxiliary compression cylinder; 21. Four-way valve; C, first C-terminal end; D, first D-terminal end; E, first E-terminal end; S, first S-terminal end; 22. Three-way valve; C', second C-terminal end; D', second D-terminal end; E', second E-terminal end; S', second S-terminal end; 3. Outdoor heat exchanger; 41. First indoor heat exchanger; 42. Second indoor heat exchanger; 51. First throttling device; 52. Second throttling device; 53. Third throttling device; 54. Fourth throttling device; 6. Storage Liquid device; 71. Outdoor fan; 72. Indoor fan; 8. Water tank; 81. Water tank inlet; 82. Water tank outlet; 83. Water tank heat exchanger; 101. First pipeline; 102. Second pipeline; 103. Third pipeline; 104. Fourth pipeline; 105. Fifth pipeline; 106. Sixth pipeline; 107. Seventh pipeline; 108. Eighth pipeline; 109. Ninth pipeline; 110. Tenth pipeline; 111. Eleventh pipeline; 112. Twelfth pipeline. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0047] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0050] like Figure 1-10 As shown, the utility model provides an integrated air conditioning and hot water system with temperature control and dehumidification functions, which includes:

[0051] Compressor 1, outdoor heat exchanger 3, first indoor heat exchanger 41, second indoor heat exchanger 42, water tank 8 and liquid storage device 6 (liquid storage tank), the exhaust end of the compressor 1 can be connected to one end of the outdoor heat exchanger 3, or to one end of the second indoor heat exchanger 42, or to one end of the water tank 8, the other end of the outdoor heat exchanger 3 is connected to the interior of the liquid storage device 6, the other end of the second indoor heat exchanger 42 is connected to one end of the first indoor heat exchanger 41, the other end of the first indoor heat exchanger 41 is connected to the interior of the liquid storage device 6, the other end of the water tank 8 is connected to the interior of the liquid storage device 6, the suction end of the compressor 1 can be connected to the one end of the outdoor heat exchanger 3, or to the one end of the second indoor heat exchanger 42, or to the one end of the water tank.

[0052] The utility model is capable of integrating the water tank into a conventional air-conditioning system by arranging a compressor, an outdoor heat exchanger, a first and a second indoor heat exchanger, a water tank and a liquid storage device, as well as the above-mentioned specific connection method of the utility model, so as to organically combine the heat pump water heater and the air-conditioning system, and can realize multiple operating modes such as cooling, heating, dehumidification, hot water supply, simultaneous hot water supply for cooling, simultaneous hot water supply for heating, dehumidification + hot water production, heat storage defrosting and conventional defrosting, that is, it can realize the modes of cooling + hot water production, heating + hot water production and dehumidification + hot water production at the same time. The utility model is capable of adaptively adjusting the circulation amount of refrigerant entering the system for circulation by arranging a liquid storage device and connecting the other end of the outdoor heat exchanger, the other end of the indoor heat exchanger and the other end of the water tank to the interior of the liquid storage device. Since the circulation amount of refrigerant is different under multiple operating modes, the circulation amount of refrigerant under different modes can be adaptively adjusted through the above-mentioned connection method of the liquid storage device, thereby solving the required The problem of high power consumption caused by small refrigerant flow and large actual circulation flow, and the problem of not being able to meet the comfort requirements due to large required refrigerant flow and small actual circulation flow are solved, thereby realizing efficient operation of the system; the utility model shares or partially shares the same set of heat exchanger and piping system in multiple operating modes, which saves initial investment and use costs compared with installing air conditioners and heat pump water heaters at the same time, and improves the comprehensive use efficiency of the system; the air-conditioning system of the utility model can also use the condensation heat generated by the refrigeration system to heat hot water (cooling + hot water making mode) when cooling and hot water are running at the same time, and can use the indoor heat absorbed by dehumidification to make hot water (dehumidification + hot water making mode), which can reduce the heat emission of the system to the environment, reduce thermal pollution and improve the energy efficiency of the system; the heat absorbed by the water in the water tank during defrosting of the outdoor heat exchanger of the utility model can be used for defrosting, which can shorten the defrosting time, reduce indoor temperature fluctuations and improve user comfort.

[0053] In order to solve the problem of high energy consumption of cooling and dehumidification when conventional household variable-frequency air conditioners are running at low load in summer, and the problem of low comfort caused by cooling and dehumidification in humid weather in the transition season, and at the same time recover the waste heat discharged outdoors during cooling operation to meet the demand for domestic hot water, the utility model provides an air-conditioning water heater system with temperature control and dehumidification function, which can simultaneously meet the functions of cooling, heating, temperature control and dehumidification, and hot water production.

[0054] The utility model can solve the following technical problems:

[0055] 1. Solve the problem of low comfort and high energy consumption caused by low air outlet temperature and evaporation temperature when conventional variable frequency air conditioners are running in humid weather during transition seasons in humid areas;

[0056] 2. Solve the problem of heat waste caused by air conditioning discharging heat to the outside during cooling and temperature control and dehumidification operation;

[0057] 3. Solve the problem of slow defrosting speed in conventional defrosting mode, reduce indoor temperature fluctuations, and improve user comfort in low-temperature heating operation;

[0058] 4. Solve the problem of mismatch of system refrigerant filling amount during multi-mode operation;

[0059] 5. In addition to achieving conventional cooling and heating functions, an air conditioning system can also realize the functions of temperature control, dehumidification and water heater, reducing equipment costs and equipment idle rate.

[0060] The utility model proposes an air-conditioning and hot water combined supply system, which collects the condensation heat discharged into the environment during the operation of the air conditioner and uses it to heat hot water or other heating equipment. It can realize multiple functions such as cooling, heating, and hot water supply, saves the initial investment and use cost of the equipment, improves the comprehensive use efficiency of the system, and at the same time can reduce the heat emission of the system to the environment, thereby reducing thermal pollution.

[0061] In some embodiments,

[0062] The device further includes a four-way valve 21 (four-way reversing valve), which includes a first D end D, a first E end E, a first S end S, and a first C end C. The four-way valve 21 can be switched between the following two communication states: in a 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 a 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.

[0063] The first D end D is connected to the exhaust end of the compressor 1 through a first pipe 101, the first E end E is connected to one end of the second indoor heat exchanger 42 through a second pipe 102, the first S end S is connected to the intake end of the compressor 1 through a third pipe 103, and the first C end C is connected to one end of the outdoor heat exchanger 3 through a fourth pipe 104.

[0064] This is the preferred structural form of the present invention. Through the setting of the four-way valve, the mode can be effectively switched, especially the connection position between the first and second indoor heat exchangers and the outdoor heat exchanger can be switched, so as to realize the switching among cooling, heating and dehumidification, as well as the switching among cooling + hot water, heating + hot water and dehumidification + hot water, etc.

[0065] The air conditioner of the present invention also has a main four-way valve (four-way valve 21) for switching between different operating modes. The D tube (first D end) of the four-way valve is connected to the exhaust port of the compressor 1, the S tube (first S end) is connected to the intake port of the compressor, the E tube (first E end) is connected to the second indoor heat exchanger 42, and the C tube (first C end) is connected to the outdoor heat exchanger 3.

[0066] In some embodiments,

[0067] The other end of the outdoor heat exchanger 3 is connected to the interior of the liquid storage device 6 through the fifth pipe 105, the other end of the first indoor heat exchanger 41 is connected to the interior of the liquid storage device 6 through the sixth pipe 106, and the other end of the water tank 8 is connected to the interior of the liquid storage device 6 through the seventh pipe 107.

[0068] The present invention further preferably connects the other end of the outdoor heat exchanger to the interior of the liquid storage device through a fifth pipe, the other end of the first indoor heat exchanger to the interior of the liquid storage device through a sixth pipe, and the other end of the water tank to the interior of the liquid storage device through a seventh pipe. The liquid storage device can be used to transport different amounts of refrigerant liquid inside the liquid storage device to the outdoor heat exchanger through the fifth pipe, to the first indoor heat exchanger through the sixth pipe, and to the water tank through the seventh pipe under different operating modes. By adjusting the liquid level of the liquid storage device, the refrigerant circulation amount in different modes can be adaptively adjusted, thereby solving the problem of mismatch in the optimal refrigerant filling amount of the system under different operating modes.

[0069] When the system requires a large amount of refrigerant to circulate, the liquid level of the liquid storage device is adjusted so that the liquid storage device releases more refrigerant to participate in the circulation, and the liquid level of the liquid storage device decreases; when the system requires a small amount of refrigerant to circulate, the liquid level of the liquid storage device is adjusted so that less refrigerant is released to participate in the circulation, and the liquid level of the liquid storage device increases. In some embodiments,

[0070] The fifth pipeline 105 is provided with a first throttling device 51, the sixth pipeline 106 is provided with a second throttling device 52, and the seventh pipeline 107 is provided with a third throttling device 53. The first indoor heat exchanger 41 and the second indoor heat exchanger 42 are connected in series, and a fourth throttling device 54 is also provided between the two.

[0071] The utility model can also adjust or close the refrigerant flow through or out of the outdoor heat exchanger by providing a first throttling device on the fifth pipeline, thereby effectively controlling the refrigerant flow through the outdoor heat exchanger; can adjust or close the refrigerant flow through or out of the indoor heat exchanger by providing a second throttling device on the sixth pipeline, thereby effectively controlling the refrigerant flow through the indoor heat exchanger; can adjust or close the refrigerant flow through or out of the water tank by providing a third throttling device on the seventh pipeline, thereby effectively controlling the refrigerant flow through the water tank, so as to meet the refrigerant flow required by the indoor and outdoor heat exchangers and water tanks in different operating modes; the fourth throttling device can be opened and adjusted when dehumidification is required to throttle the refrigerant, thereby meeting the functions and effects of dehumidification and dehumidification + hot water production.

[0072] The water tank heat exchanger 83 in the water tank 8 of the air-conditioning system of the utility model forms a series or parallel relationship with the outdoor heat exchanger 3, the first indoor heat exchanger 41 and the second indoor heat exchanger 42 through different combinations of the four-way valve 21, the three-way valve 22 and the first throttling device 51, the second throttling device 52, the third throttling device 53 and the fourth throttling device 54, and can realize cooling, heating, dehumidification, hot water, cooling + hot water, heating + hot water, dehumidification + hot water, heat storage defrosting and conventional defrosting to meet the needs of different users.

[0073] The first throttling device 51 of the air conditioning system of the present invention is preferably connected in series between the outdoor heat exchanger 3 and the liquid storage device 6, the second throttling device 52 is preferably connected in series between the liquid storage device 6 and the first indoor heat exchanger 41, and the third throttling device 53 is connected in series between the liquid storage device 6 and the water tank 8. The first throttling device 51, the second throttling device 52, and the third throttling device 53 are all throttling devices with closed valves and no flow. When the system needs to switch operating modes, closing the throttling device can cut off the refrigerant flow in this section of the pipeline.

[0074] The air-conditioning and hot water system of the present invention detects the opening status of the system operation mode, controls the switches of the first and three-way valves and the throttling device, and activates different operation modes; and detects the water temperature in the water tank and compares it with the set temperature to activate different defrosting operation modes (heat storage defrosting improves defrosting efficiency); the refrigerant used in the air-conditioning and hot water integrated system with temperature control and dehumidification function of the present invention is preferably environmentally friendly and efficient refrigerant such as R32 and R290.

[0075] In some embodiments,

[0076] The end of the fifth pipeline 105 connected to the interior of the liquid storage device 6 is the first end, and the first end is higher than the first height of the inner bottom surface of the liquid storage device 6. The end of the sixth pipeline 106 connected to the interior of the liquid storage device 6 is the second end, and the second end is higher than the second height of the inner bottom surface of the liquid storage device 6. The end of the seventh pipeline 107 connected to the interior of the liquid storage device 6 is the third end, and the third end is higher than the third height of the inner bottom surface of the liquid storage device 6. The distance between the first end and the top of the liquid storage device 6 is the fourth height, and the fourth height is greater than the first height. The distance between the second end and the top of the liquid storage device 6 is the fifth height, and the fifth height is greater than the second height. The distance between the third end and the top of the liquid storage device 6 is the sixth height, and the sixth height is greater than the third height.

[0077] This is a further preferred structural form of the integrated air-conditioning and hot water system with temperature control and dehumidification functions of the present invention, that is, the heights of the fifth pipeline, the sixth pipeline and the seventh pipeline inserted into the liquid storage device are all at the lower end, which can effectively absorb refrigerant from the refrigerant liquid at the bottom of the liquid storage device and enter the corresponding heat exchanger for heat exchange, and can adaptively adjust the refrigerant flow circulating into the system under different operating modes, solving the problem of high power consumption caused by the small required refrigerant flow and the large actual circulation flow. By adjusting the liquid level of the liquid storage device, the refrigerant circulation volume in different modes can be adaptively adjusted, solving the problem of mismatch of the optimal refrigerant filling volume in the system under different functional operating modes.

[0078] In some embodiments,

[0079] The liquid storage device 6 has an intermediate height dividing line that is half the height, the first end is at a distance of the seventh height from the intermediate height dividing line, and the seventh height is greater than the first height, the second end is at a distance of the eighth height from the intermediate height dividing line, and the eighth height is greater than the second height, and the third end is at a distance of the ninth height from the intermediate height dividing line, and the ninth height is greater than the third height.

[0080] This is a further preferred structural form of the integrated air-conditioning and hot water system with temperature control and dehumidification functions of the present invention, that is, the heights of the fifth pipeline, the sixth pipeline and the seventh pipeline inserted into the liquid storage device are all located closer to the lower end of the middle height dividing line, which can further absorb refrigerant from the refrigerant liquid at the bottom of the liquid storage device and enter the corresponding heat exchanger for heat exchange. By adjusting the liquid level of the liquid storage device, the refrigerant circulation volume in different modes can be adaptively adjusted, solving the problem of mismatch in the optimal refrigerant filling volume of the system under different functional operation modes.

[0081] The air conditioner of the present invention also has a refrigerant filling amount adjustment device (i.e., a liquid storage device), which is respectively connected to the first throttling device 51, the second throttling device 52 and the third throttling device 53, and the pipes connected to the filling amount adjustment device are all inserted into a position close to the bottom to ensure that the refrigerant leaving the liquid storage device is in a liquid state, thereby achieving the purpose of liquid level regulation in the liquid storage device.

[0082] In some embodiments,

[0083] The three-way valve 22 includes a second D end D', a second E end E', a second S end S' and a second C end C'. The three-way valve 22 can be switched between the following two communication states: in the first state, the second D end D' is connected to the second C end C', and the second E end E' is connected to the second S end S'; 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'.

[0084] The second D end D' is connected to the exhaust end of the compressor 1 through the eighth pipeline 108, the second E end E' is blocked, the second S end S' can be connected to the intake end of the compressor 1 through the ninth pipeline 109, and the second C end C' can be connected to the one end of the water tank 8 through the tenth pipeline 110;

[0085] The tenth pipe 110 contacts the water tank 8 through a refrigerant pipe and exchanges heat with the water in the water tank 8. One end of the water tank 8 is one end of the refrigerant pipe, and the other end of the water tank 8 is the other end of the refrigerant pipe. The other end of the refrigerant pipe is connected to the seventh pipe 107. The refrigerant pipe forms at least a part of the structure of the water tank heat exchanger 83.

[0086] It also includes an indoor fan 72 and an outdoor fan 71, the outdoor fan 71 is opposite to the outdoor heat exchanger 3 so as to drive the airflow to exchange heat with the refrigerant in the outdoor heat exchanger 3, the indoor fan 72 is opposite to at least part of the structure of the first indoor heat exchanger 41, and the indoor fan 72 is also opposite to at least part of the structure of the second indoor heat exchanger 42 so as to drive the airflow to exchange heat with the refrigerant in the first indoor heat exchanger 41 and the second indoor heat exchanger 42.

[0087] The utility model can connect one end of the water tank to the exhaust end of the compressor through the tenth pipeline, so that when hot water needs to be produced, the second C end and the second D end can be connected by adjusting the three-way valve, and the third throttling device can be opened to utilize the high-temperature and high-pressure refrigerant to enter the water tank to heat the water to produce hot water at the required temperature; when heat storage and defrosting are needed, the second C end and the second S end can be connected by adjusting the three-way valve, and the third throttling device can be opened to utilize the high-temperature and high-pressure refrigerant to enter the outdoor heat exchanger to defrost it, and the low-temperature refrigerant after heat exchange can enter the water tank to absorb the stored heat of the water tank, which will not reduce the indoor temperature and improve the comfort level; the fourth throttling device can be opened and throttling adjustment can be performed to achieve the functions and effects of indoor dehumidification and dehumidification + hot water production.

[0088] The air conditioner of this utility model also has a main four-way reversing valve (four-way valve 21) and an auxiliary three-way valve (three-way valve 22) for switching between different operating modes. The D pipe of the main four-way reversing valve is connected to the exhaust port of the compressor 1, the S pipe is connected to the intake port of the compressor, the E pipe is connected to the second indoor heat exchanger 42, and the C pipe is connected to the outdoor heat exchanger 3. The auxiliary three-way valve is preferably a four-way reversing valve with the E pipe blocked.

[0089] 1. The air-conditioning water heater of the present invention comprises a compressor 1, an outdoor heat exchanger 3, a first indoor heat exchanger 41, a second indoor heat exchanger 42, an outdoor fan 71, and an indoor fan 72. The first and second indoor heat exchangers are arranged in series along the refrigerant flow direction. In cooling mode, both indoor heat exchangers function as evaporators. In heating mode, both indoor heat exchangers function as condensers. In temperature-controlled dehumidification mode, the first and second indoor heat exchangers function as reheat condensers and dehumidification evaporators, respectively.

[0090] 2. The air conditioner also has a first throttling device 51, a second throttling device 52, a third throttling device 53, and a reheat dehumidification auxiliary throttling device (fourth throttling device 54). The first throttling device 51 is connected in series between the outdoor heat exchanger 3 and the liquid storage device 6, the second throttling device 52 is connected in series between the liquid storage device 6 and the first indoor heat exchanger 41, the third throttling device 53 is connected in series between the liquid storage device 6 and the water tank 8, and the dehumidification throttling device is connected in series between the first indoor heat exchanger 41 and the second indoor heat exchanger 42. The first throttling device 51, the second throttling device 52, and the third throttling device 53 are electronic expansion valves with no flow when the valve is closed. The fourth throttling device 54 can be a solenoid valve with closed throttling or a specially designed dehumidification electronic expansion valve, which has a flow characteristic of large flow when fully open, small flow during the dehumidification working period, and a sufficiently small slope.

[0091] 3. The air conditioner also features a main four-way reversing valve (four-way valve 21) and an auxiliary three-way valve (three-way valve 22) for switching between different operating modes. The main four-way reversing valve's D pipe is connected to the compressor's exhaust port, its S pipe is connected to the compressor's intake port, its E pipe is connected to the second indoor heat exchanger 42, and its C pipe is connected to the outdoor heat exchanger 3. The auxiliary three-way valve can also be a four-way reversing valve with its E pipe blocked.

[0092] 4. The air conditioner also has a refrigerant filling amount adjustment device (liquid storage device 6), which is respectively connected to the first throttling device 51, the second throttling device 52 and the third throttling device 53, and the pipes connected to the filling amount adjustment device are all inserted into a position close to the bottom (to ensure that liquid refrigerant enters the connecting pipe).

[0093] 5. The air conditioner has multiple operating modes including cooling, heating, temperature control and dehumidification, hot water making, cooling and hot water making at the same time, temperature control and dehumidification and hot water making at the same time, heating and hot water making at the same time, and heat storage and defrosting.

[0094] 6. The refrigerant used in this air conditioning water heater system is R32, R290 and other environmentally friendly and efficient refrigerants.

[0095] The utility model has the following beneficial effects:

[0096] 1. This utility model connects two heat exchangers in series on the indoor side through a dehumidification electronic expansion valve. One part of the indoor heat exchanger cools and dehumidifies while the other part heats the indoor return air, achieving temperature control and dehumidification in transitional seasons and improving the comfort of the dehumidification process.

[0097] 2. The cooling and temperature control dehumidification mode recovers the condensation heat that would otherwise be discharged outdoors through the water heater, providing domestic hot water while cooling and dehumidifying, thereby improving the overall energy efficiency of the system;

[0098] 3. Thermal storage defrost can shorten the defrost time in low-temperature heating mode, reduce indoor temperature fluctuations, and improve user comfort in low-temperature heating mode;

[0099] 4. By setting up a refrigerant liquid storage device, efficient operation in different modes can be achieved;

[0100] 5. The multifunctional air conditioning system described in this proposal is relatively simple, reliable and low-cost.

[0101] like Figure 1 The air conditioning and hot water integrated system with temperature control and dehumidification function of the utility model shown in the figure includes a compressor 1, an outdoor heat exchanger 3, a first throttling device 51, a second throttling device 52, a third throttling device 53, a first indoor heat exchanger 41, a second indoor heat exchanger 42, a water tank heat exchanger 83, a four-way valve 21, a three-way valve 22 (wherein the three-way valve can also be a four-way reversing valve with an E-tube welded), an outdoor fan 71, an indoor fan 72, a water tank 8 and a liquid storage device 6 for adjusting the refrigerant filling amount, etc.

[0102] The exhaust port of the compressor 1 of the present invention is connected to the D pipe of the four-way valve 21 and the D pipe of the three-way valve 22, respectively, and the intake port is connected to the S pipe of the four-way valve 21 and the S pipe of the three-way valve 22, respectively. The C pipe of the four-way valve 21 is connected to one end of the outdoor heat exchanger, and the other end of the outdoor heat exchanger is connected to the first throttling device 51. The liquid storage device 6 for adjusting the refrigerant filling amount has three connecting pipe interfaces respectively connected to the three throttling devices, wherein the three connecting pipes of the liquid storage tank are respectively inserted into the bottom of the liquid storage tank. The first indoor heat exchanger 41 is respectively connected to the second throttling device 52 and the fourth throttling device 54, and the second indoor heat exchanger is respectively connected to the fourth throttling device 54 and the E pipe of the four-way reversing valve. The refrigerant circulation pipeline of the water tank is respectively connected to the C pipe of the three-way valve 22 and the third throttling device 53. The utility model can realize multiple operation modes such as independent cooling, heating, dehumidification, hot water making, cooling + hot water making, heating + hot water making, dehumidification + hot water making, heat storage defrosting and conventional defrosting by controlling the throttling device and the four-way valve and the three-way valve.

[0103] In some embodiments,

[0104] It also includes an auxiliary compression cylinder 12, an eleventh pipeline 111 and a twelfth pipeline 112. The suction end of the auxiliary compression cylinder 12 is connected to the internal upper end of the liquid storage device 6 through the eleventh pipeline 111, and the exhaust end of the auxiliary compression cylinder 12 is connected to the first pipeline 101 through the twelfth pipeline 112.

[0105] Figure 9 This is the first alternative embodiment of the present invention. The compressor in the main embodiment is replaced with a parallel compressor having two compression cylinders, two intake ports, and one exhaust port. The original liquid storage device 6 in the main embodiment system also serves as the flash evaporator of this embodiment. The intake port of the auxiliary compression cylinder 12 is connected to the liquid storage device 6 to absorb the refrigerant gas flashed from the liquid storage device 6. This forms a parallel compression cycle, reduces the evaporator inlet specific enthalpy, improves the system's cooling energy efficiency ratio and heating performance coefficient, and significantly increases the system's heating capacity. This alternative embodiment can achieve the same functional mode as the main embodiment, and the valve switching and operation methods under different operating modes are similar to those of the main embodiment.

[0106] In some embodiments,

[0107] The first indoor heat exchanger 41, the second indoor heat exchanger 42, the second throttling device 52 and the fourth throttling device 54 constitute at least a partial structure of a group of indoor unit units, and there are multiple indoor unit units, and the multiple indoor unit units are connected in parallel to each other.

[0108] Figure 10 This second alternative embodiment of the present invention adds an indoor unit (i.e., at least one indoor unit is arranged in parallel, each indoor unit including a first indoor heat exchanger 41, a second indoor heat exchanger 42, and corresponding throttling devices: a second throttling device 52 and a fourth throttling device 54), forming a multi-split mode of the air conditioning system. The indoor units can be independently turned on or off (in principle, multiple indoor units can be connected in parallel to form a multi-split mode. This embodiment only illustrates the connection of a single multi-split unit in parallel). This alternative embodiment can achieve the same functional modes as the main embodiment, and the switching and operation of valves in different operating modes are similar to those of the main embodiment.

[0109] The present invention also provides a control method for the aforementioned integrated air-conditioning and hot water system with temperature control and dehumidification functions, wherein:

[0110] When the integrated air conditioning and hot water system with temperature control and dehumidification function includes the four-way valve 21, the three-way valve 22, the first throttling device 51, the second throttling device 52, the third throttling device 53 and the fourth throttling device 54, the control method includes:

[0111] Detection steps to detect the required operating mode of the system;

[0112] a judging step of judging whether the desired operating mode is a cooling mode, a heating mode, a dehumidification mode, a cooling + hot water mode, a heating + hot water mode, a dehumidification + hot water mode, or a defrost mode;

[0113] The control step controls the switching of the four-way valve 21 and the three-way valve 22, and controls the on and off of the first throttling device 51, the second throttling device 52, the third throttling device 53 and the fourth throttling device 54 and adjusts the size of the opening according to the requirements of different operating modes.

[0114] The utility model integrates the water tank into the conventional air-conditioning system, organically combines the heat pump water heater and the air-conditioning system, and controls the switching of two four-way valves and the opening and closing and opening degree of three throttling devices according to the needs of different operating modes, so as to realize multiple operating modes such as cooling, heating, dehumidification, hot water supply, simultaneous hot water supply for cooling, simultaneous hot water supply for heating, dehumidification + hot water making mode, heat storage defrost and conventional defrost, that is, it can realize the modes of cooling + hot water making, heating + hot water making and dehumidification + hot water making modes at the same time. The utility model sets a liquid storage device, and connects the other end of the outdoor heat exchanger, the other end of the indoor heat exchanger and the other end of the water tank to the interior of the liquid storage device, so as to adaptively adjust the circulation amount of the refrigerant entering the system for circulation. Since the circulation amount of the refrigerant is different in multiple operating modes, the above-mentioned connection of the liquid storage device can be used to adjust the circulation amount of the refrigerant entering the system for circulation. The method can adapt to the refrigerant circulation volume in different modes, solves the problem of high power consumption caused by small required refrigerant flow and large actual circulation flow, and solves the problem of unsatisfactory comfort caused by large required refrigerant flow and small actual circulation flow, thereby realizing efficient operation of the system; the utility model shares or partially shares the same set of heat exchanger and piping system in multiple operating modes, which saves initial investment and use costs and improves the comprehensive use efficiency of the system compared with installing air conditioners and heat pump water heaters at the same time. The air-conditioning system of the utility model can also use the condensation heat generated by the refrigeration system to heat hot water (cooling + hot water making mode) when cooling and hot water are running at the same time, and can use the indoor heat absorbed by dehumidification to make hot water (dehumidification + hot water making mode), which can reduce the heat emission of the system to the environment, reduce thermal pollution and improve the energy efficiency of the system.

[0115] In some embodiments,

[0116] The control step, when the required operating mode of the system is the cooling mode, controls the four-way valve 21 so that 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, and controls the third throttling device 53 to be closed, controls the first throttling device 51 and the second throttling device 52 to be opened and the opening sizes of the two are controlled to change, and the fourth throttling device 54 is fully opened;

[0117] When the required operating mode of the system is heating mode, the four-way valve 21 is controlled so that 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, and the third throttling device 53 is controlled to be closed, the first throttling device 51 and the second throttling device 52 are controlled to be opened and the opening sizes of the two are controlled to change, and the fourth throttling device 54 is fully opened;

[0118] When the required operating mode of the system is temperature-controlled dehumidification, the four-way valve 21 is controlled so that 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. The third throttling device 53 is controlled to be closed, the first throttling device 51 and the second throttling device 52 are controlled to be fully opened, and the fourth throttling device 54 is opened and its opening size is controlled to change.

[0119] When the required operating mode of the system is the cooling + hot water mode, the four-way valve 21 is controlled so that 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, and the first throttling device 51 is controlled to be closed, the three-way valve 22 is controlled so that the second D end D' is connected to the second C end C', and the second S end S' is blocked, and the first throttling device 51 and the third throttling device 53 are controlled to be opened to adjust the liquid level in the liquid storage device 6, the second throttling device 52 is controlled to be opened and its opening size is controlled to change, and the fourth throttling device 54 is fully opened;

[0120] When the required operating mode of the system is heating + hot water mode, the four-way valve 21 is controlled so that 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 three-way valve 22 is controlled so that the second D end D' is connected to the second C end C', and the second S end S' is blocked. The second throttling device 52 and the third throttling device 53 are both controlled to open to adjust the liquid level in the liquid storage device 6. The first throttling device 51 is opened and its opening size is controlled to change, and the fourth throttling device 54 is fully open.

[0121] like Figure 1As shown, during cooling mode operation, both four-way valve 21 and three-way valve 22 are de-energized, with pipes D and C connected, pipes S and E connected, and the third throttling device 53 closed. High-temperature, high-pressure refrigerant gas discharged from the compressor enters the outdoor heat exchanger 3 through pipes D and C of the four-way valve 21, where it releases heat and condenses into high-pressure liquid refrigerant. It then undergoes partial throttling by the first throttling device 51 before entering the liquid storage device 6. The refrigerant in the liquid storage device is further throttled and reduced in pressure by the second throttling device 52, transforming into a low-temperature, low-pressure two-phase state before entering the first and second indoor heat exchangers 41 and 42. There, it absorbs heat and vaporizes, cooling the indoor air to meet cooling requirements. After heat exchange, the low-pressure refrigerant gas enters the compressor's intake port through pipes E and S of the four-way valve 21, where it is compressed into a high-temperature, high-pressure gas within the compression cylinder, completing the entire refrigeration cycle.

[0122] In this mode, the fourth throttle device 54 is in a fully open state to reduce the refrigerant pressure drop between the first indoor heat exchanger 41 and the second indoor heat exchanger 42. The third throttle device 53 connected to the hot water tank is in a closed state.

[0123] like Figure 2 As shown, during heating mode operation, four-way valve 21 is energized, connecting pipes D and E, and pipes C and S. Three-way valve 22 is de-energized, connecting pipes D and C, and pipes S and E. Third throttling device 53 is closed. High-temperature, high-pressure gaseous refrigerant discharged from compressor 1 flows through pipes D and E of four-way valve 21, sequentially entering the second indoor heat exchanger 42 and first indoor heat exchanger 41, where it condenses and releases heat, transforming into a high-pressure, subcooled liquid. It then undergoes a first throttling and pressure reduction by the second throttling device 52 before entering the liquid storage device 6. The refrigerant in the liquid storage tank undergoes further throttling and pressure reduction by the first throttling device 51, then enters the outdoor heat exchanger 3, where it evaporates and absorbs heat, transforming into a low-pressure, superheated gas. The gaseous refrigerant flowing out of the outdoor heat exchanger 3 flows through pipes C and S of four-way valve 21, enters the compressor intake, and is compressed into a high-temperature, high-pressure gas within the compression cylinder before being discharged from the compressor exhaust, completing the heating cycle.

[0124] In this mode, the fourth throttle device 54 is in a fully open state to reduce the refrigerant pressure drop between the second indoor heat exchanger 42 and the first indoor heat exchanger 41. The third throttle device 53 connected to the hot water tank is in a closed state.

[0125] like Figure 3 As shown, when the temperature control and dehumidification mode is in operation, the four-way valve 21 and the three-way valve 22 are powered off. Figure 3As shown. The D and C tubes of the four-way valve 21 are connected, while the E and S tubes are connected. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor passes through the D and C tubes of the four-way valve 21, entering the outdoor heat exchanger 3 to release some heat before entering the liquid storage device 6. The two-phase refrigerant in the liquid storage device 6 passes through the second throttling device 52 and enters the first indoor heat exchanger 41, where it continues to release heat and condenses into a subcooled liquid. The refrigerant from the first indoor heat exchanger passes through the fourth throttling device 54, where it is throttled and reduced in pressure, before entering the second indoor heat exchanger 42. The low-temperature, low-pressure refrigerant absorbs heat in the second indoor heat exchanger 42, vaporizing into a low-pressure, superheated gas. It then passes through the E and S tubes of the four-way valve 21 and enters the compressor's intake port. The refrigerant is compressed to a high-temperature, high-pressure state within the compression cylinder and discharged through the compressor's exhaust port, completing the entire reheat and dehumidification cycle.

[0126] In this mode, the fourth throttling device 54 is in a throttling state, the first throttling device 51 and the second throttling device 52 are in a fully open state, and the third throttling device 53 connected to the hot water tank is in a closed state. The second indoor heat exchanger 42 acts as a separate evaporator to cool and dehumidify the indoor air, and the first indoor heat exchanger 41 acts as a reheat condenser to heat the indoor return air. The low-temperature, low-humidity air that has passed through the evaporator is mixed with the high-temperature air that has passed through the reheat heat exchanger and then sent into the room, increasing the supply air temperature during the dehumidification process and ensuring the comfort of the indoor environment. This mode can adjust the supply air temperature by adjusting the outdoor fan speed. That is, the lower the outdoor fan speed, the higher the supply air temperature.

[0127] like Figure 4 As shown, during hot water heating mode, four-way valve 21 is energized, connecting pipes D and E, and pipes C and S. Three-way valve 22 is de-energized, connecting pipes D and C, and pipes S and E. The second throttling device 52 is closed. High-temperature, high-pressure gaseous refrigerant discharged from the compressor flows through pipes D and C of three-way valve 22 into the heat exchanger in the static water tank 8, where it condenses and releases heat to heat the water in the tank. The condensed, subcooled refrigerant flows through the third throttling device 53 and enters the liquid storage device 6. The refrigerant in the liquid storage device 6 is throttled and reduced in pressure by the first throttling device 51 before entering the outdoor heat exchanger 3. The low-temperature, low-pressure refrigerant absorbs heat in the outdoor heat exchanger 3, vaporizing into a low-pressure, superheated gas. It then flows through pipes C and S of four-way valve 21 into the compressor's intake port. The refrigerant is compressed to a high-temperature, high-pressure state within the compression cylinder and discharged through the compressor's exhaust port, completing the entire hot water heating cycle.

[0128] In this mode, the second throttle device 52 is closed, and the third throttle device 53 connected to the hot water tank controls the refrigerant level in the liquid storage device 6 to ensure that the refrigerant in the system is in an optimal state. The first throttle device 51 performs the primary throttling function, controlling the compressor's suction superheat to ensure system reliability and energy efficiency.

[0129] like Figure 5 As shown, during cooling + hot water mode, both four-way valve 21 and three-way valve 22 are de-energized, pipes D and C are connected, pipes S and E are connected, and first throttling device 51 is closed. High-temperature, high-pressure gaseous refrigerant discharged from the compressor flows through pipes D and C of four-way valve 21 and three-way valve 22, respectively, into outdoor heat exchanger 3 and water tank heat exchanger 83 of static water tank 8. The refrigerant, condensed and releasing heat in water tank heat exchanger 83 and outdoor heat exchanger 3 to form a subcooled liquid, flows through third throttling device 53 and first throttling device 51, respectively, and enters liquid storage device 6. The refrigerant in the liquid storage device 6 is throttled and reduced in pressure by the second throttling device 52 and then enters the first indoor heat exchanger 41 and the second indoor heat exchanger 42 in sequence. The low-temperature and low-pressure refrigerant absorbs heat and vaporizes into a low-pressure superheated gas state in the first indoor heat exchanger 41 and the second indoor heat exchanger 42, and then enters the suction port of the compressor through the E pipe and S pipe of the four-way valve 21. The refrigerant is compressed into a high-temperature and high-pressure state in the compression cylinder and then discharged through the exhaust port of the compressor, thereby completing the entire cooling and heating water cycle.

[0130] In this mode, the fourth throttling device 54 is fully open. The third throttling device 53 connected to the hot water tank and the first throttling device 51 connected to the outdoor heat exchanger control the refrigerant level in the liquid storage device 6 to ensure that the refrigerant in the system is in an optimal state. The second throttling device 52 plays the primary throttling role, controlling the compressor's suction superheat to ensure system reliability and energy efficiency. In this mode, the heat load of the water tank 8 and the outdoor heat exchanger 3 can be adjusted by adjusting the speed of the outdoor fan 71. When the water tank temperature deviates significantly from the set temperature, the first throttling device 51 and outdoor fan 71 can be turned off. When the water tank temperature reaches the set temperature, the third throttling device 53 can be turned off to improve system energy efficiency.

[0131] In some embodiments,

[0132] When the required operating mode of the system is temperature control dehumidification + hot water mode,

[0133] Control the four-way valve 21 so that 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. Control the three-way valve 22 so that the second D end D' is connected to the second C end C', and the second S end S' is blocked.

[0134] The detecting step further detects the water temperature in the water tank;

[0135] When the water temperature is less than the first preset value, the water tank is controlled to perform an indoor dehumidification operation mode, the first throttling device 51 is controlled to be closed, the third throttling device 53 and the second throttling device 52 are controlled to be opened to adjust the liquid level in the liquid storage device 6, and the fourth throttling device 54 is controlled to be opened and its opening size is changed;

[0136] When the water temperature is ≥ the first preset value, the outdoor heat exchanger is controlled to perform an operation mode for indoor dehumidification, the third throttling device 53 is controlled to be closed, and the first throttling device 51 and the second throttling device 52 are controlled to be opened to adjust the liquid level in the liquid storage device 6, and the fourth throttling device 54 is controlled to be opened and its opening size is changed.

[0137] like Figure 6 As shown, when operating in temperature-controlled dehumidification and simultaneous hot water production mode, both four-way valve 21 and three-way valve 22 are de-energized. The D and C pipes of four-way valve 21 and three-way valve 22 are connected, and the E and S pipes are connected. High-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the water tank heat exchanger 83 of the static water tank 8 through pipes D and C of three-way valve 22. After condensing and releasing some heat in the water tank heat exchanger 83, it passes through the third throttling device 53 and enters the liquid storage device 6. The refrigerant in the liquid storage device 6 passes through the second throttling device 52 and enters the first indoor heat exchanger 41, where it further condenses and releases heat, becoming a subcooled liquid. The supercooled liquid enters the second indoor heat exchanger 42 after being throttled and reduced in pressure by the fourth throttling device 54. The low-temperature and low-pressure refrigerant absorbs heat and vaporizes into a low-pressure superheated gas in the second indoor heat exchanger 42, and then enters the suction port of the compressor through the E pipe and S pipe of the four-way valve 21. The refrigerant is compressed into a high-temperature and high-pressure state in the compression cylinder and is discharged through the exhaust port of the compressor, thereby completing the entire temperature control, dehumidification and hot water production cycle.

[0138] In this mode, the third throttling device 53 connected to the water tank heat exchanger 83 controls the refrigerant level of the liquid storage device 6 to ensure that the refrigerant in the system is in the best state. The fourth throttling device 54 plays the main throttling role, controlling the suction superheat of the compressor to ensure the reliability and energy efficiency of the system operation. In this mode, the heat discharged to the outside by temperature-controlled dehumidification can be recovered in the form of hot water. When the water temperature in the water tank exceeds the set temperature, the third throttling device 53 can be closed and the first throttling device 51 and the outdoor fan 71 can be opened; when the water temperature in the water tank reaches the set temperature, the third throttling device 53 can be closed to improve the system operation energy efficiency. The condensation heat in the dehumidification process is discharged to the outside through the outdoor heat exchanger to maintain the indoor temperature during the dehumidification process.

[0139] like Figure 7As shown, during heating + hot water mode operation, four-way valve 21 is energized, with pipes D and E connected, and pipes C and S connected. Three-way valve 22 is de-energized, with pipes D and C connected, and pipes E and S connected. High-temperature, high-pressure gaseous refrigerant discharged from the compressor enters four-way valve 21 and three-way valve 22 in two separate pathways. One pathway passes through pipes D and C of three-way valve 22 and enters the water tank heat exchanger 83 of the static water tank 8, where it releases heat and condenses. It then passes through the third throttling device 53 and enters the liquid storage device 6, heating the water in the water tank. The other pathway passes through pipes D and E of four-way valve 21, sequentially entering the second indoor heat exchanger 42 and the first indoor heat exchanger 41, where it releases heat and condenses, heating the indoor air. The condensed refrigerant liquid passes through the second throttling device 52 and enters the liquid storage device 6. The refrigerant in the liquid storage device 6 is throttled and reduced in pressure by the first throttling device 51 and then enters the outdoor heat exchanger 3 to evaporate and absorb outdoor heat to become a low-pressure superheated gas state. After coming out of the outdoor heat exchanger 3 in the low-pressure superheated gas state, it passes through the C pipe and S pipe of the four-way valve 21 and enters the suction port of the compressor. The refrigerant is compressed into a high-temperature and high-pressure state in the compression cylinder and then discharged through the exhaust port of the compressor, thus completing the entire heating + hot water heating cycle.

[0140] In this mode, the third throttle device 53, connected to the water tank heat exchanger 83, and the second throttle device 52 regulate the heat load on the first and second indoor heat exchangers 41, 42, and the water tank heat exchanger 83, while also controlling the refrigerant level in the liquid storage device 6 to ensure the refrigerant in the system is in optimal condition. The first throttle device 51 performs the primary throttling function, controlling the compressor's suction superheat to ensure system reliability and energy efficiency.

[0141] The schematic diagrams of the conventional defrosting operation mode and the cooling operation mode are the same, such as Figure 1 shown.

[0142] The utility model detects the opening and closing of the system operation mode and controls the opening and closing of the four-way valve, three-way valve and throttling device to open different operation modes. The refrigerant used in the air conditioning and hot water integrated system with temperature control and dehumidification function of the utility model is environmentally friendly and efficient refrigerant such as R32 and R290.

[0143] In some embodiments,

[0144] The judging step further judges whether the mode is hot water only mode after judging that the mode is neither cooling mode nor heating mode;

[0145] In the control step, if the hot water only mode is used, the four-way valve 21 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 three-way valve 22 is controlled to connect the second D end D' with the second C end C', and the second S end S' is blocked; the second throttling device 52 is controlled to be closed, and the first throttling device 51 and the third throttling device 53 are controlled to be opened and the opening sizes of the two are controlled to change;

[0146] The determining step further determines whether the mode is defrosting mode after determining that the mode is neither cooling mode nor heating mode, and moreover, not hot water only mode;

[0147] If the detection step is in defrost mode, the water temperature in the water tank is also detected;

[0148] When the water temperature is ≥ the second preset value, the heat storage defrost operation mode is executed, the four-way valve 21 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 three-way valve 22 is controlled to block the second D end D', and the second C end C' with the second S end S', and the second throttling device 52 is controlled to be closed, and the first throttling device 51 and the third throttling device 53 are controlled to be opened and the opening sizes of the two are controlled to change;

[0149] When the water temperature is less than the second preset value, the control executes the normal defrost operation mode. In the control step, if it is the defrost mode, the four-way valve 21 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 three-way valve 22 is controlled to connect the second D end D' with the second C end C', and the second S end S' is blocked, and the third throttling device 53 is controlled to be closed, and the first throttling device 51 and the second throttling device 52 are controlled to be opened and the opening sizes of the two are controlled to change;

[0150] In the judging step, when it is judged that the system is neither in cooling mode nor in heating mode, nor in hot water only mode nor in defrosting mode, the controlling step controls the integrated air conditioning and hot water system with temperature control and dehumidification function to shut down.

[0151] like Figure 4As shown, during hot water heating mode, four-way valve 21 is energized, connecting pipes D and E, and pipes C and S. Three-way valve 22 is de-energized, connecting pipes D and C, and pipes S and E. The second throttling device 52 is closed. High-temperature, high-pressure gaseous refrigerant discharged from the compressor flows through pipes D and C of three-way valve 22 into the heat exchanger in the static water tank 8, where it condenses and releases heat to heat the water in the tank. The condensed, subcooled refrigerant flows through the third throttling device 53 and enters the liquid storage device 6. The refrigerant in the liquid storage device 6 is throttled and reduced in pressure by the first throttling device 51 before entering the outdoor heat exchanger 3. The low-temperature, low-pressure refrigerant absorbs heat in the outdoor heat exchanger 3, vaporizing into a low-pressure, superheated gas. It then flows through pipes C and S of four-way valve 21 into the compressor's intake port. The refrigerant is compressed to a high-temperature, high-pressure state within the compression cylinder and discharged through the compressor's exhaust port, completing the entire hot water heating cycle.

[0152] When the hot water only mode is in operation, the four-way valve 21 is energized and the three-way valve 22 is de-energized. Figure 4 As shown. The D and E tubes of the four-way valve 21 are connected, while the C and S tubes are connected. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the heat exchanger in the static water tank 8 through the D and C tubes of the three-way valve 22, where it condenses and releases heat to heat the water in the tank. The condensed, supercooled refrigerant passes through the third throttling device 53 and enters the liquid storage device 6. The refrigerant in the liquid storage device 6 is throttled and depressurized by the first throttling device 51 before entering the outdoor heat exchanger 3. The low-temperature, low-pressure refrigerant absorbs heat in the outdoor heat exchanger 3, vaporizing into a low-pressure, superheated gas. It then passes through the C and S tubes of the four-way valve 21 and enters the compressor's intake port. The refrigerant is compressed to a high-temperature, high-pressure state within the compression cylinder and discharged through the compressor's exhaust port, completing the entire hot water heating cycle.

[0153] In this mode, the second throttle device 52 is closed, and the third throttle device 53 connected to the hot water tank controls the refrigerant level in the liquid storage device 6 to ensure that the refrigerant in the system is in an optimal state. The first throttle device 51 performs the primary throttling function, controlling the compressor's suction superheat to ensure system reliability and energy efficiency.

[0154] like Figure 8As shown, during thermal storage and defrost mode, four-way valve 21 and three-way valve 22 are energized, pipes D and C are connected, pipes E and S are connected, and second throttling device 52 is closed. High-temperature, high-pressure gaseous refrigerant discharged from the compressor passes through pipes D and C of four-way valve 21 and enters outdoor heat exchanger 3, where it releases heat and condenses to melt the frost layer on the outdoor heat exchanger. The condensed refrigerant liquid passes through first throttling device 51 and enters liquid storage device 6. The refrigerant in liquid storage device 6 is throttled and reduced in pressure by third throttling device 53 before entering water tank heat exchanger 83, where it evaporates and absorbs heat from the hot water in the water tank, transforming into a low-pressure, superheated gas. This low-pressure, superheated gas exits water tank heat exchanger 83 and passes through pipes C and S of three-way valve 22 to the compressor intake. The refrigerant is compressed to a high-temperature, high-pressure state within the compression cylinder before being discharged through the compressor exhaust, completing the thermal storage and defrost cycle.

[0155] In this mode, the second throttle device 52 is closed, and the first throttle device 51 controls the refrigerant level in the liquid storage device 6 to ensure that the refrigerant in the system is in an optimal state. The third throttle device 53 plays a primary role in throttling and reducing pressure, controlling the compressor's suction superheat to ensure system reliability and energy efficiency.

[0156] like Figure 1 As shown, during normal defrost mode, both four-way valve 21 and three-way valve 22 are de-energized, pipes D and C are open, pipes S and E are open, and the third throttling device 53 is closed. High-temperature, high-pressure refrigerant gas discharged from the compressor enters the outdoor heat exchanger 3 through pipes D and C of the four-way valve 21. There, it is cooled and condensed into high-pressure liquid refrigerant. It then enters the liquid storage device 6 after partial throttling by the first throttling device 51. The refrigerant in the liquid storage device is further throttled and reduced in pressure by the second throttling device 52, becoming a low-temperature, low-pressure two-phase state. It then enters the first and second indoor heat exchangers 41, 42, where it absorbs heat and vaporizes, cooling the indoor air and meeting cooling requirements. After heat exchange, the low-pressure refrigerant gas enters the compressor's intake port through pipes E and S of the four-way valve 21, where it is compressed into a high-temperature, high-pressure gas within the compression cylinder, completing the entire refrigeration cycle.

[0157] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. Such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. An integrated air conditioning and hot water system with temperature control and dehumidification functions, characterized by: include: A compressor (1), an outdoor heat exchanger (3), a first indoor heat exchanger (41), a second indoor heat exchanger (42), a water tank (8) and a liquid storage device (6); the exhaust end of the compressor (1) can be connected to one end of the outdoor heat exchanger (3), or to one end of the second indoor heat exchanger (42), or to one end of the water tank (8); the other end of the outdoor heat exchanger (3) is connected to the interior of the liquid storage device (6); the other end of the second indoor heat exchanger (42) is connected to one end of the first indoor heat exchanger (41); the other end of the first indoor heat exchanger (41) is connected to the interior of the liquid storage device (6); the other end of the water tank (8) is connected to the interior of the liquid storage device (6); the intake end of the compressor (1) can be connected to the one end of the outdoor heat exchanger (3), or to the one end of the second indoor heat exchanger (42), or to the one end of the water tank (8).

2. The integrated air conditioning and hot water system with temperature control and dehumidification functions according to claim 1 is characterized by: The invention also includes a four-way valve (21), wherein the four-way valve (21) includes a first D end (D), a first E end (E), a first S end (S), and a first C end (C), and the four-way valve (21) can be switched between the following two communication states: in a first state, the first D end (D) is communicated with the first C end (C), and the first E end (E) is communicated with the first S end (S); in a second state, the first D end (D) is communicated with the first E end (E), and the first C end (C) is communicated with the first S end (S). The first D end (D) is connected to the exhaust end of the compressor (1) through a first pipe (101), the first E end (E) is connected to one end of the second indoor heat exchanger (42) through a second pipe (102), the first S end (S) is connected to the intake end of the compressor (1) through a third pipe (103), and the first C end (C) is connected to one end of the outdoor heat exchanger (3) through a fourth pipe (104).

3. The integrated air conditioning and hot water system with temperature control and dehumidification function according to claim 1 or 2, characterized in that: The other end of the outdoor heat exchanger (3) is connected to the interior of the liquid storage device (6) through a fifth pipe (105), the other end of the first indoor heat exchanger (41) is connected to the interior of the liquid storage device (6) through a sixth pipe (106), and the other end of the water tank (8) is connected to the interior of the liquid storage device (6) through a seventh pipe (107).

4. The integrated air conditioning and hot water system with temperature control and dehumidification functions according to claim 3 is characterized by: The fifth pipeline (105) is provided with a first throttling device (51), the sixth pipeline (106) is provided with a second throttling device (52), and the seventh pipeline (107) is provided with a third throttling device (53). The first indoor heat exchanger (41) and the second indoor heat exchanger (42) are connected in series, and a fourth throttling device (54) is also provided between the two.

5. The integrated air conditioning and hot water system with temperature control and dehumidification functions according to claim 3 is characterized by: The end of the fifth pipeline (105) connected to the interior of the liquid storage device (6) is the first end, and the first end is higher than the first height of the inner bottom surface of the liquid storage device (6). The end of the sixth pipeline (106) connected to the interior of the liquid storage device (6) is the second end, and the second end is higher than the second height of the inner bottom surface of the liquid storage device (6). The end of the seventh pipeline (107) connected to the interior of the liquid storage device (6) is the third end, and the third end is higher than the third height of the inner bottom surface of the liquid storage device (6). The distance between the first end and the top of the liquid storage device (6) is a fourth height, and the fourth height is greater than the first height. The distance between the second end and the top of the liquid storage device (6) is a fifth height, and the fifth height is greater than the second height. The distance between the third end and the top of the liquid storage device (6) is a sixth height, and the sixth height is greater than the third height.

6. The integrated air conditioning and hot water system with temperature control and dehumidification functions according to claim 5, characterized in that: The liquid storage device (6) has an intermediate height dividing line of half the height, the first end is at a distance of the seventh height from the intermediate height dividing line, and the seventh height is greater than the first height, the second end is at a distance of the eighth height from the intermediate height dividing line, and the eighth height is greater than the second height, and the third end is at a distance of the ninth height from the intermediate height dividing line, and the ninth height is greater than the third height.

7. The integrated air conditioning and hot water system with temperature control and dehumidification functions according to claim 3, characterized in that: The invention also includes a three-way valve (22), wherein the three-way valve (22) includes a second D end (D'), a second S end (S') and a second C end (C'), and the three-way valve (22) can be switched between the following two communication states: in a first state, the second D end (D') is communicated with the second C end (C'), and the second S end (S') is blocked; in a second state, the second D end (D') is blocked, and the second C end (C') is communicated with the second S end (S'). The second D end (D') is connected to the exhaust end of the compressor (1) through an eighth pipeline (108), the second S end (S') can be connected to the intake end of the compressor (1) through a ninth pipeline (109), and the second C end (C') can be connected to the one end of the water tank (8) through a tenth pipeline (110); The tenth pipeline (110) contacts the water tank (8) through a refrigerant pipeline and exchanges heat with the water in the water tank (8); one end of the water tank (8) is one end of the refrigerant pipeline, and the other end of the water tank (8) is the other end of the refrigerant pipeline. The other end of the refrigerant pipeline is connected to the seventh pipeline (107), and the refrigerant pipeline forms at least a partial structure of the water tank heat exchanger (83); The invention also includes an indoor fan (72) and an outdoor fan (71), wherein the outdoor fan (71) is opposite to the outdoor heat exchanger (3) so as to drive the airflow to exchange heat with the refrigerant in the outdoor heat exchanger (3), and the indoor fan (72) is opposite to at least a part of the structure of the first indoor heat exchanger (41). The indoor fan (72) is also opposite to at least a part of the structure of the second indoor heat exchanger (42) so as to drive the airflow to exchange heat with the refrigerant in the first indoor heat exchanger (41) and the second indoor heat exchanger (42).

8. The integrated air conditioning and hot water system with temperature control and dehumidification functions according to claim 2, characterized in that: The auxiliary compression cylinder (12), an eleventh pipeline (111) and a twelfth pipeline (112) are further included. The suction end of the auxiliary compression cylinder (12) is connected to the internal upper end of the liquid storage device (6) through the eleventh pipeline (111), and the discharge end of the auxiliary compression cylinder (12) is connected to the first pipeline (101) through the twelfth pipeline (112).

9. The integrated air conditioning and hot water system with temperature control and dehumidification functions according to claim 4, characterized in that: The first indoor heat exchanger (41), the second indoor heat exchanger (42), the second throttling device (52) and the fourth throttling device (54) constitute at least a partial structure of a group of indoor unit units, and the indoor unit units are multiple, and the multiple indoor unit units are connected in parallel with each other.

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