Air conditioner and water heating all-in-one machine with temperature control and dehumidification functions

Abstract

The utility model provides an air conditioner and hot water all-in-one machine 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 refrigerant-water heat exchanger and a liquid storage device, and the exhaust end of the compressor is communicated to one end of the outdoor heat exchanger, one end of the first indoor heat exchanger or one end of the refrigerant-water heat exchanger. One end of the second indoor heat exchanger communicates with the exhaust end or the air suction end of the compressor, the other end of the second indoor heat exchanger communicates with the liquid storage device, and the other end of the outdoor heat exchanger, the other end of the first indoor heat exchanger or the other end of the refrigerant-water heat exchanger communicates with the interior of the liquid storage device. The suction end of the compressor communicates with one end of the outdoor heat exchanger or one end of the first indoor heat exchanger. 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 machine 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 air conditioning and hot water integrated machine 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 air conditioning and hot water integrated machine with temperature control and dehumidification functions.

[0008] In order to solve the above problems, the utility model provides an air conditioning and hot water integrated machine 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 refrigerant-water heat exchanger 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 first indoor heat exchanger, or to one end of the refrigerant-water heat exchanger, the other end of the outdoor heat exchanger is connected to the interior of the liquid storage device, the other end of the first indoor heat exchanger is connected to the interior of the liquid storage device, one end of the second indoor heat exchanger can be connected to the exhaust end or the intake end of the compressor, the other end of the second indoor heat exchanger is connected to the interior of the liquid storage device, the other end of the refrigerant-water heat exchanger is connected to the interior of the liquid storage device, the intake end of the compressor can be connected to the one end of the outdoor heat exchanger or to the one end of the first indoor heat exchanger.

[0010] In some embodiments,

[0011] The device further includes a first four-way valve, the first four-way valve including a first D end, a first E end, a first S end, and a first C end, and the first 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 C end is connected to one end of the outdoor heat exchanger through a second pipeline, the first S end is connected to the suction end of the compressor through a third pipeline, and the first E end is connected to one end of the first indoor heat exchanger through a fourth pipeline.

[0013] In some embodiments,

[0014] The other end of the outdoor heat exchanger is connected to the interior of the liquid storage device through a fifth pipe, the other end of the first indoor heat exchanger is connected to the interior of the liquid storage device through a sixth pipe, the other end of the second indoor heat exchanger is connected to the interior of the liquid storage device through a seventh pipe, and the other end of the refrigerant-water heat exchanger is connected to the interior of the liquid storage device through an eighth pipe;

[0015] It also includes a water tank and a water pump. The water tank is connected to the interior of the refrigerant-water heat exchanger through a first water channel, and the water tank is connected to the interior of the refrigerant-water heat exchanger through a second water channel, so that water and refrigerant can exchange heat in the refrigerant-water heat exchanger to produce hot water. A water pump is provided on the first water channel and / or the second water channel.

[0016] In some embodiments,

[0017] The fifth pipeline is provided with a first throttling device, the seventh pipeline is provided with a second throttling device, the sixth pipeline and the seventh pipeline are merged and connected to the liquid storage device through the fifteenth pipeline, the fifteenth pipeline is provided with a second throttling device, the eighth pipeline is provided with a fourth throttling device, and the first indoor heat exchanger and the second indoor heat exchanger are arranged on the same air flow path indoors.

[0018] In some embodiments,

[0019] 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 fifteenth 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 eighth 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.

[0020] In some embodiments,

[0021] 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.

[0022] In some embodiments,

[0023] 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.

[0024] In some embodiments,

[0025] The second four-way valve further includes a second four-way valve, the second four-way valve including a second D end, a second C end, a second S end, and a second E end. The second four-way valve can be switched between the following two communication states: in a first state, the second D end is connected to the second C end, and the second S end is connected to the second E end; in a second state, the second D end is connected to the second E end, and the second C end is connected to the second S end.

[0026] The second D end is connected to the exhaust end of the compressor through the ninth pipeline, the second S end can be connected to the intake end of the compressor through the tenth pipeline, the second C end can be connected to the third pipeline through the eleventh pipeline, and the second E end can be connected to one end of the second indoor heat exchanger through the twelfth pipeline.

[0027] In some embodiments,

[0028] The compressor includes a first cylinder and a second cylinder, the first cylinder having a first intake port, the second cylinder having a second intake port, the first S end of the first four-way valve being connected to the first intake port of the first cylinder via the third pipeline, and the second S end of the second four-way valve being connected to the second intake port of the second cylinder via the tenth pipeline;

[0029] The system further includes a thirteenth pipeline, one end of the thirteenth pipeline being connected to the twelfth pipeline, the other end of the thirteenth pipeline being connected to the refrigerant-water heat exchanger, and a one-way valve being provided on the eleventh pipeline, the one-way valve only allowing the refrigerant fluid to flow from the third pipeline to the second end C of the second four-way valve;

[0030] The thirteenth pipeline contacts the refrigerant-water heat exchanger through the refrigerant pipeline and exchanges heat with the water in the refrigerant-water heat exchanger. One end of the refrigerant-water heat exchanger is one end of the refrigerant pipeline, and the other end of the refrigerant-water heat exchanger is the other end of the refrigerant pipeline. The other end of the refrigerant pipeline is connected to the eighth pipeline, and the refrigerant pipeline forms at least a partial structure of the refrigerant-water heat exchanger.

[0031] In some embodiments,

[0032] The compressor further includes an auxiliary compression cylinder and a fourteenth pipeline. The auxiliary compression cylinder has a third air intake port. The third air intake port is connected to the inner upper end of the liquid storage device through the fourteenth pipeline. The gas discharged from the auxiliary compression cylinder is mixed with the gas discharged from the first cylinder and the gas discharged from the second cylinder in the casing of the compressor and is discharged through the first pipeline and / or the ninth pipeline.

[0033] In some embodiments,

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

[0035] The utility model provides an air-conditioning and hot water integrated machine with temperature control and dehumidification functions, which has the following beneficial effects:

[0036] The present invention is able to integrate the refrigerant-water heat exchanger into a conventional air-conditioning system and organically combine the heat pump water heater and the air-conditioning system by arranging a compressor, an outdoor heat exchanger, a first and a second indoor heat exchanger, a refrigerant-water heat exchanger and a liquid storage device, as well as the above-mentioned specific connection method of the present invention, 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 production, etc., that is, it is able to realize the modes of cooling + hot water production, heating + hot water production and dehumidification + hot water production at the same time. The present invention is able to adaptively adjust 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 first and second indoor heat exchangers, and the other end of the refrigerant-water heat exchanger 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 the storage device. The above-mentioned connection mode of the liquid device can adapt to the refrigerant circulation volume in different modes, solves the problem of high power consumption caused by the small required refrigerant flow and the large actual circulation flow, and solves the problem of not meeting the comfort requirements due to the large required refrigerant flow and the small actual circulation flow, thereby realizing efficient operation of the system; the utility model shares or partially shares the same set of heat exchangers and piping systems in multiple operating modes, which saves initial investment and use costs and improves the comprehensive use efficiency of the system compared to 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

[0037] Figure 1 This is a system diagram of the air-conditioning and hot water integrated machine with temperature control and dehumidification functions in cooling mode of the present invention;

[0038] Figure 2 This is a system diagram of the air-conditioning and hot water integrated machine with temperature control and dehumidification functions in heating mode of the present invention;

[0039] Figure 3 This is a system diagram of the air-conditioning and hot water integrated machine with temperature control and dehumidification function in the temperature control and dehumidification mode of the present invention;

[0040] Figure 4 This is a system diagram of the air-conditioning and hot water integrated machine with temperature control and dehumidification functions in the hot water only mode of the present invention;

[0041] Figure 5 This is a system diagram of the air-conditioning and hot water integrated machine with temperature control and dehumidification functions in the cooling + hot water production mode of the utility model;

[0042] Figure 6 This is a system diagram of the air-conditioning and hot water integrated machine with temperature control and dehumidification functions in the heating + hot water mode of the present invention;

[0043] Figure 7 This is a system diagram of the air-conditioning and hot water integrated machine with temperature control and dehumidification function in the dehumidification + hot water production mode of the utility model;

[0044] Figure 8 This is a system diagram of an alternative embodiment 1 of the air-conditioning and hot water integrated machine with temperature control and dehumidification functions of the present invention;

[0045] Figure 9 This is a system diagram of alternative embodiment 2 of the air-conditioning and hot water integrated machine with temperature control and dehumidification functions of the present invention.

[0046] The reference numerals indicate:

[0047] 10. Compressor; 11. Exhaust port; 12. First air intake port; 13. Second air intake port; 14. Third air intake port; 20. Outdoor heat exchanger; 31. First throttling device; 32. Second throttling device; 33. Third throttling device; 34. Fourth throttling device; 41. First indoor heat exchanger; 42. Second indoor heat exchanger; 51. First four-way valve; C, first C end; D, first D end; E, first E end; S, first S end; 52. Second four-way valve; C', second C end; D', second D end; E', second E end; S', second S end; 61. Outdoor fan; 62. Indoor fan; 70. One-way valve; 80. Liquid storage device; 90. Refrigerant-water heat exchanger; 91 , refrigerant-water heat exchanger water inlet; 92, refrigerant-water heat exchanger water outlet; 93, refrigerant inlet; 94, refrigerant outlet; 95, water tank water inlet; 96, water tank water outlet; 120, water tank; 121, water pump; 101, first pipeline; 102, second pipeline; 103, third pipeline; 104, fourth pipeline; 105, fifth pipeline; 106, sixth pipeline; 107, seventh pipeline; 108, eighth pipeline; 109, ninth pipeline; 110, tenth pipeline; 111, eleventh pipeline; 112, twelfth pipeline; 113, thirteenth pipeline; 114, fourteenth pipeline; 115, fifteenth pipeline; 201, first waterway; 202, second waterway. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] like Figure 1-9 As shown, the utility model provides an air conditioning and hot water integrated machine with temperature control and dehumidification functions, which includes:

[0055] Compressor 10, outdoor heat exchanger 20, first indoor heat exchanger 41, second indoor heat exchanger 42, refrigerant-water heat exchanger 90 and liquid storage device 80 (liquid storage tank), the exhaust end of the compressor 10 can be connected to one end of the outdoor heat exchanger 20, or to one end of the first indoor heat exchanger 41, or to one end of the refrigerant-water heat exchanger 90, the other end of the outdoor heat exchanger 20 is connected to the interior of the liquid storage device 80, the other end of the first indoor heat exchanger 41 is connected to the interior of the liquid storage device 80, one end of the second indoor heat exchanger 42 can be connected to the exhaust end or the intake end of the compressor 10, the other end of the second indoor heat exchanger 42 is connected to the interior of the liquid storage device 80, the other end of the refrigerant-water heat exchanger 90 is connected to the interior of the liquid storage device 80, the intake end of the compressor 10 can be connected to the one end of the outdoor heat exchanger 20 or to the one end of the first indoor heat exchanger 41.

[0056] The present invention is able to integrate the refrigerant-water heat exchanger into a conventional air-conditioning system and organically combine the heat pump water heater and the air-conditioning system by arranging a compressor, an outdoor heat exchanger, a first and a second indoor heat exchanger, a refrigerant-water heat exchanger and a liquid storage device, as well as the above-mentioned specific connection method of the present invention, 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 production, etc., that is, it is able to realize the modes of cooling + hot water production, heating + hot water production and dehumidification + hot water production at the same time. The present invention is able to adaptively adjust 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 first and second indoor heat exchangers, and the other end of the refrigerant-water heat exchanger 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 the storage device. The above-mentioned connection mode of the liquid device can adapt to the refrigerant circulation volume in different modes, solves the problem of high power consumption caused by the small required refrigerant flow and the large actual circulation flow, and solves the problem of not meeting the comfort requirements due to the large required refrigerant flow and the small actual circulation flow, thereby realizing efficient operation of the system; the utility model shares or partially shares the same set of heat exchangers and piping systems in multiple operating modes, which saves initial investment and use costs and improves the comprehensive use efficiency of the system compared to 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.

[0057] 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.

[0058] The utility model can solve the following technical problems:

[0059] 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;

[0060] 2. Solve the problem of heat waste caused by air conditioning discharging heat to the outside during cooling and temperature control and dehumidification operation;

[0061] 3. Solve the problem of high energy consumption caused by low evaporation temperature when conventional variable frequency air conditioners are running at low load for cooling and dehumidification;

[0062] 4. Solve the problem of mismatch of system refrigerant filling amount during multi-mode operation;

[0063] 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.

[0064] 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.

[0065] In some embodiments,

[0066] The device further includes a first four-way valve 51 (four-way reversing valve), the first four-way valve 51 including a first D end D, a first E end E, a first S end S and a first C end C. The first four-way valve 51 can switch between the following two 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.

[0067] The first D end D is connected to the exhaust end of the compressor 10 through a first pipe 101, the first C end C is connected to one end of the outdoor heat exchanger 20 through a second pipe 102, the first S end S is connected to the intake end of the compressor 10 through a third pipe 103, and the first E end E is connected to one end of the first indoor heat exchanger 41 through a fourth pipe 104.

[0068] This is the preferred structural form of the present invention. Through the setting of the first four-way valve, the mode can be effectively switched, especially the connection position between the first indoor heat exchanger 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.

[0069] The air conditioner of the present invention also has a main four-way valve (first four-way valve 51) for switching between different operating modes. The D tube (first D end) of the four-way valve is connected to the exhaust port of the compressor 10, 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 20.

[0070] In some embodiments,

[0071] The other end of the outdoor heat exchanger 20 is connected to the interior of the liquid storage device 80 via a fifth pipe 105. The other end of the first indoor heat exchanger 41 is connected to the interior of the liquid storage device 80 via a sixth pipe 106. The other end of the second indoor heat exchanger 42 is connected to the interior of the liquid storage device 80 via a seventh pipe 107. The other end of the refrigerant-water heat exchanger 90 is connected to the interior of the liquid storage device 80 via an eighth pipe 108.

[0072] It also includes a water tank 120 and a water pump 121. The water tank 120 is connected to the interior of the refrigerant-water heat exchanger 90 through a first water path 201. The water tank 120 is connected to the interior of the refrigerant-water heat exchanger 90 through a second water path 202, so that water and refrigerant can exchange heat in the refrigerant-water heat exchanger 90 to produce hot water. The water pump 121 is provided on the first water path 201 and / or the second water path 202.

[0073] The utility model 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, the other end of the second indoor heat exchanger to the interior of the liquid storage device through a seventh pipe, and the other end of the refrigerant-water heat exchanger to the interior of the liquid storage device through an eighth pipe. The liquid storage device can be used to transport different amounts of refrigerant liquid in 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 second indoor heat exchanger through the seventh pipe in different operating modes. The indoor heat exchanger is transported to the refrigerant-water heat exchanger through the eighth pipeline. By adjusting the liquid level of the liquid storage device, the refrigerant circulation volume in different modes can be adaptively adjusted, which solves the problem of high power consumption caused by the small required refrigerant flow and the large actual circulation flow, and solves the problem of the large required refrigerant flow and the small actual circulation flow that cannot meet the comfort requirements, thereby realizing efficient operation of the system; the utility model can also control the water flow through the water pump between the water tank and the refrigerant-water heat exchanger, so as to adjust the hot water flow according to different conditions (such as water temperature, indoor heat exchanger pipe temperature, etc.) to further improve the comfort.

[0074] When the system demands a large amount of refrigerant circulation, 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 demands a small amount of refrigerant circulation, 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.

[0075] In some embodiments,

[0076] The fifth pipeline 105 is provided with a first throttling device 31, the sixth pipeline 106 and the seventh pipeline 107 are merged and connected to the liquid storage device 80 through the fifteenth pipeline 115, the fifteenth pipeline 115 is provided with a second throttling device 32, the seventh pipeline 107 is provided with a third throttling device 33, and the eighth pipeline 108 is provided with a fourth throttling device 34. The first indoor heat exchanger 41 and the second indoor heat exchanger 42 are arranged on the same air flow path indoors.

[0077] The utility model can also adjust or close the refrigerant flow through or out of the outdoor heat exchanger by the first throttling device provided on the fifth pipeline, thereby effectively controlling the refrigerant flow through the outdoor heat exchanger. By providing a second throttling device on the fifteenth pipeline after the sixth pipeline and the seventh pipeline are merged, the refrigerant flow through or out of the indoor unit or into the indoor unit can be adjusted or closed, thereby effectively controlling the refrigerant flow through the entire indoor unit. By providing a third throttling device on the seventh pipeline, the refrigerant flow through or out of the second indoor heat exchanger can be adjusted or closed. The refrigerant flow is adjusted or closed, thereby effectively controlling the refrigerant flow through the second indoor heat exchanger; the fourth throttling device is provided on the eighth pipeline, which can adjust or close the refrigerant flow through or out of the refrigerant-water heat exchanger, thereby effectively controlling the refrigerant flow through the refrigerant-water heat exchanger, so as to meet the refrigerant flow required by the indoor and outdoor heat exchangers and the refrigerant-water heat exchanger 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 making.

[0078] The utility model provides a throttling device on the fifteenth pipe after the pipes connecting the two indoor heat exchangers are merged, and provides a throttling device on the pipe connected to the second indoor heat exchanger. It can give priority to regulating the overall refrigerant flow in the room, and then accurately adjust the refrigerant flow of the second indoor heat exchanger, so as to achieve precise temperature control of the indoor environment of the second indoor heat exchanger in particular, and firstly through the main throttling device on the fifteenth pipe, it can quickly adjust the refrigerant flow of the indoor unit unit to the required range, so that the regulation is faster, which can improve the regulation speed and comfort of cooling / heating / dehumidification.

[0079] The refrigerant-water heat exchanger in the refrigerant-water heat exchanger 90 of the air-conditioning system of the present invention forms different communication modes with the outdoor heat exchanger 20, the first indoor heat exchanger 41 and the second indoor heat exchanger 42 through different combinations of the first four-way valve 51, the second four-way valve 52 and the first throttling device 31, the second throttling device 32, the third throttling device 33 and the fourth throttling device 34, and can realize cooling, heating, dehumidification, hot water, cooling + hot water, heating + hot water, dehumidification + hot water and other operating modes to meet the needs of different users.

[0080] The first throttling device 31 of the air conditioning system of the present invention is preferably connected in series between the outdoor heat exchanger 20 and the liquid storage device 80, the second throttling device 32 is preferably provided on the fifteenth pipeline 115 connected to the liquid storage device 80, the third throttling device 33 is provided on the seventh pipeline connected to the second indoor heat exchanger 42, and the fourth throttling device 34 is connected in series between the liquid storage device 80 and the refrigerant-water heat exchanger 90. The first throttling device 31, the second throttling device 32, the third throttling device 33, and the fourth throttling device 34 are preferably 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.

[0081] 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 four-way valve and the second four-way valve and the first to fourth throttling devices, and opens different operation modes; the refrigerant used in the air-conditioning and hot water integrated machine with temperature control and dehumidification function of the present invention is preferably environmentally friendly and efficient refrigerant such as R32 and R290.

[0082] In some embodiments,

[0083] The end of the fifth pipeline 105 connected to the interior of the liquid storage device 80 is the first end, and the first end is higher than the first height of the inner bottom surface of the liquid storage device 80. The end of the fifteenth pipeline 115 connected to the interior of the liquid storage device 80 is the second end, and the second end is higher than the second height of the inner bottom surface of the liquid storage device 80. The end of the eighth pipeline 108 connected to the interior of the liquid storage device 80 is the third end, and the third end is higher than the third height of the inner bottom surface of the liquid storage device 80. The distance between the first end and the top of the liquid storage device 80 is the fourth height, and the fourth height is greater than the first height. The distance between the second end and the top of the liquid storage device 80 is the fifth height, and the fifth height is greater than the second height. The distance between the third end and the top of the liquid storage device 80 is the sixth height, and the sixth height is greater than the third height.

[0084] This is a further preferred structural form of the air conditioning and hot water integrated machine with temperature control and dehumidification functions of the present invention, that is, the heights of the fifth pipeline, the fifteenth pipeline and the eighth 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 rate circulating into the system under different operating modes, thereby solving the problem of high power consumption caused by the small required refrigerant flow rate and the large actual circulation flow rate, and solving the problem of the required refrigerant flow rate being large and the actual circulation flow rate being small and the inability to meet the comfort requirements, thereby realizing efficient operation of the system.

[0085] In some embodiments,

[0086] The liquid storage device 80 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.

[0087] This is a further preferred structural form of the air-conditioning and hot water integrated machine with temperature control and dehumidification functions of the present invention, that is, the heights of the fifth pipeline, the sixth + seventh pipeline and the eighth 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, and can adaptively adjust the refrigerant flow rate circulating into the system under different operating modes, thereby solving the problem of high power consumption caused by the small required refrigerant flow rate and the large actual circulation flow rate, and solving the problem of the required refrigerant flow rate being large and the actual circulation flow rate being small and failing to meet the comfort requirements, thereby realizing efficient operation of the system.

[0088] 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 31, the second throttling device 32, the third throttling device 33 and the fourth throttling device 34, and the pipes connected to the filling amount adjustment device are all inserted into a position close to the bottom.

[0089] In some embodiments,

[0090] It also includes an indoor fan 62 and an outdoor fan 61. The outdoor fan 61 is opposite to the outdoor heat exchanger 20 so as to drive the airflow to exchange heat with the refrigerant in the outdoor heat exchanger 20. The indoor fan 62, the first indoor heat exchanger 41 and the second indoor heat exchanger 42 are all located on the same airflow path. Along the flow direction of the airflow, the second indoor heat exchanger 42 is located downstream of the first indoor heat exchanger 41, and the indoor fan 62 is located upstream of the first indoor heat exchanger 41 or downstream of the second indoor heat exchanger 42. The outdoor fan can drive the air flow to exchange heat with the outdoor heat exchanger, and by controlling the opening and closing and the speed of the outdoor fan, the outdoor heat exchanger can be controlled to exchange heat and the heat exchange amount can be adjusted. The indoor fan can drive the air flow to exchange heat with the indoor heat exchanger, and by controlling the opening and closing and the speed of the indoor fan, the indoor heat exchanger can be controlled to exchange heat and the heat exchange amount can be adjusted. The two indoor heat exchangers and the indoor fan are located on the same air flow path, and the air flow can be driven to pass through the first or second indoor heat exchanger first, and then through the other indoor heat exchanger for heat exchange, thereby achieving dual-temperature cooling or heating effects, and also achieving constant temperature dehumidification effects.

[0091] In some embodiments,

[0092] The second four-way valve 52 includes a second D end D', a second C end C', a second S end S' and a second E end E'. The second four-way valve 52 can 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 S end S' is connected to the second E end E'; in the second state, the second D end D' is connected to the second E end E', and the second C end C' is connected to the second S end S'.

[0093] The second D end D' is connected to the exhaust end of the compressor 10 through the ninth pipeline 109, the second S end S' can be connected to the suction end of the compressor 10 through the tenth pipeline 110, the second C end C' can be connected to the third pipeline 103 through the eleventh pipeline 111, and the second E end E' can be connected to one end of the second indoor heat exchanger 42 through the twelfth pipeline 112.

[0094] The utility model can connect the refrigerant-water heat exchanger and the second indoor heat exchanger to the air conditioning refrigeration system by setting a second four-way valve, so as to achieve the effect of hot water production, and can also heat the room through the second indoor heat exchanger, and when the second indoor heat exchanger heats the room, the first indoor heat exchanger can also cool the room, so as to achieve multiple functions of hot water production + cooling, hot water production + heating and hot water production + dehumidification. The ninth pipeline can connect one end of the refrigerant-water heat exchanger to the exhaust end of the compressor, so that when hot water needs to be produced, the second four-way valve can be adjusted to The valve connects the second C end and the second D end. By opening the fourth throttling device, the high-temperature and high-pressure refrigerant can be used to enter the refrigerant-water heat exchanger to heat the water to produce hot water at the required temperature; when dehumidification + hot water production is required, the second four-way valve is adjusted to connect the second C end and the second S end. By opening the fourth throttling device, the dehumidification effect can be achieved at the indoor heat exchanger while producing hot water; the fourth throttling device can be opened and throttling adjusted to achieve the functions and effects of indoor dehumidification and dehumidification + hot water production.

[0095] The air conditioner of this utility model also has a main four-way reversing valve (first four-way valve 51) and an auxiliary four-way valve (second four-way valve 52) for switching between different operating modes. The D pipe of the main four-way reversing valve is connected to the exhaust port of the compressor 10, the S pipe is connected to the intake port of the compressor, the E pipe is connected to the first indoor heat exchanger 41, and the C pipe is connected to the outdoor heat exchanger 20.

[0096] In some embodiments,

[0097] The compressor includes a first cylinder and a second cylinder, the first cylinder having a first intake port 12, the second cylinder having a second intake port 13, the first S end S of the first four-way valve 51 being connected to the first intake port 12 of the first cylinder via the third pipeline 103, and the second S end S' of the second four-way valve 52 being connected to the second intake port 13 of the second cylinder via the tenth pipeline 110;

[0098] The thirteenth pipeline 113 is further included. One end of the thirteenth pipeline 113 is connected to the twelfth pipeline 112, and the other end of the thirteenth pipeline 113 is connected to the refrigerant-water heat exchanger 90. The eleventh pipeline 111 is provided with a one-way valve 70. The one-way valve 70 only allows the refrigerant fluid to flow from the third pipeline 103 to the second C end C' of the second four-way valve 52.

[0099] The thirteenth pipeline 113 contacts the refrigerant-water heat exchanger 90 through the refrigerant pipeline and exchanges heat with the water in the refrigerant-water heat exchanger 90. One end of the refrigerant-water heat exchanger 90 is one end of the refrigerant pipeline, and the other end of the refrigerant-water heat exchanger 90 is the other end of the refrigerant pipeline. The other end of the refrigerant pipeline is connected to the eighth pipeline 108, and the refrigerant pipeline forms at least a partial structure of the refrigerant-water heat exchanger.

[0100] The utility model can be connected to the first and second indoor heat exchangers through the first and second cylinders and the first and second air intakes through the first and second four-way valves respectively, so as to achieve the effects of dual-temperature cooling and dual-temperature heating for multiple indoor environments, as well as the effects of hot water production + dehumidification, separate dehumidification, etc. The two pipes connected to the air intakes of the two cylinders can be connected into one through the one-way valve and the eleventh pipe, that is, when only the outdoor heat exchanger is evaporating or when only the refrigerant-water heat exchanger is used as the evaporator, the pipes leading back to the compressor can be respectively led back to the two cylinders, ensuring that both cylinders have air intake and can perform normal compression.

[0101] 1. The air-conditioning water heater of the present invention is composed of a compressor 10, an outdoor heat exchanger 20, a first indoor heat exchanger 41, a second indoor heat exchanger 42, an outdoor fan 61, and an indoor fan 62. The first indoor and second indoor heat exchangers are arranged upstream and downstream along the air flow direction. In cooling mode, the two indoor heat exchangers simultaneously serve as evaporators. In heating mode, the two indoor heat exchangers simultaneously serve as condensers. In temperature control and dehumidification mode, the second indoor and first indoor heat exchangers serve as reheat condensers and dehumidification evaporators, respectively. The water flow rate is controlled by adjusting the frequency of the water pump 121, thereby adjusting the water outlet temperature of the refrigerant-water heat exchanger and switching the heating mode of the heat pump water heater.

[0102] The compressor includes a first compression section, a second compression section, a first air intake port 12, a second air intake port 13, and an exhaust port 11. The first and second compression sections are connected to the first and second air intake ports, respectively, and to the exhaust port. The refrigerant-water heat exchanger includes a refrigerant inlet 93 and a refrigerant outlet 94. The refrigerant inlet 93 is connected to the compressor exhaust port 11, and the refrigerant outlet 94 is connected to the liquid storage device 80. The liquid storage device 80 is connected in series between the outdoor heat exchanger 20 and the first and second heat exchangers. When heating water, the water inlet 91 of the refrigerant-water heat exchanger 90 is connected to one end of the water pump 121, the other end of the water pump 121 is connected to the water tank, and the water outlet 92 of the refrigerant-water heat exchanger is connected to the water tank. There are two ways to connect the refrigerant side of the refrigerant-water heat exchanger. One is that the refrigerant inlet 93 of the refrigerant-water heat exchanger 90 is connected to the E end of the second four-way valve 52, and the outlet 94 of the refrigerant-water heat exchanger is connected to one end of the fourth throttling device 34. The other is that the inlet of the refrigerant-water heat exchanger 90 is connected to the exhaust port of the compressor, and the refrigerant outlet of the refrigerant-water heat exchanger is connected to the D pipe of the first four-way valve 51 and the second four-way valve 52. The first and second heat exchangers are arranged sequentially along the air flow direction. During cooling, the first and second heat exchangers are connected in parallel, and their outlets are connected to the first and second air intakes respectively, and their inlets are connected to the liquid storage device 80, the outdoor heat exchanger 20, and the exhaust port 11 of the compressor in sequence; during temperature control and dehumidification, the second indoor heat exchanger 42 is connected in parallel with the outdoor heat exchanger 20, and its inlets are connected to the exhaust port 11 of the compressor respectively, and its outlets are connected to the first indoor heat exchanger 41 and the first and second air intakes in sequence.

[0103] 2. The air conditioner also has a main four-way reversing valve (first four-way valve 51) and a dehumidification four-way valve (second four-way valve 52). Port D of the first four-way valve is connected to the exhaust port 11 of the compressor 10, port S is connected to the first air intake port 12 of the compressor, port C is connected to the outdoor heat exchanger 20, and port E is connected to the first indoor heat exchanger 41 to switch between different operating modes. The D pipe of the second four-way reversing valve is connected to the exhaust port of the compressor 10, the S pipe is connected to the second air intake port 13 of the compressor, the E pipe is connected to the second indoor heat exchanger 42, and the C pipe is connected to the refrigerant inlet 93 of the refrigerant-water heat exchanger 90.

[0104] 3. The air conditioner further includes a one-way valve 70 , which is connected in series between the S port of the second four-way valve 52 and the first air intake port 12 of the compressor 10 .

[0105] 4. The air conditioner further comprises a first throttling device 31, a second throttling device 32, a third throttling device 33, and a fourth throttling device 34. The first throttling device 31 is connected in series between the outdoor heat exchanger 20 and the liquid storage device 80, the second throttling device 32 is connected in series between the liquid storage device 80 and the first and second indoor heat exchangers, the third throttling device 33 is connected in series between the second throttling device 32 and the second indoor heat exchanger 42, and the fourth throttling device 34 is connected in series between the liquid storage device 80 and the refrigerant-water heat exchanger 90. Each of the multiple throttling devices can be an electronic expansion valve, a thermal expansion valve, a throttling short tube, or a capillary tube.

[0106] 5. The air conditioner of the present invention also has a refrigerant filling amount adjustment device (liquid storage device 80), which is respectively connected to the first throttling device 31, the second throttling device 32, the third throttling device 33 and the fourth throttling device 34, 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).

[0107] 6. The air conditioner of the present invention has multiple operating modes (at least 5 functions and 7 modes in total), 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, and heating and hot water making at the same time.

[0108] 7. The refrigerant used in the air conditioning water heater system of the present invention is environmentally friendly and efficient refrigerant such as R32 and R290.

[0109] The utility model has the following beneficial effects:

[0110] 1. When dehumidification is required during the transition season, the utility model switches the functional valve, allowing the indoor windward evaporator to dehumidify and cool the return air, while the indoor leeward heat exchanger becomes a condenser and is connected in parallel with the outdoor condenser. The electronic expansion valves connected in series to the respective outlet pipes adjust the refrigerant flow distribution, thereby achieving condensation load distribution and indoor air outlet temperature regulation, significantly improving comfort and reducing energy consumption.

[0111] 2. This utility model sets two heat exchangers in parallel on the indoor side and connects them to the two air inlets of the compressor respectively, so that the indoor return air has two different evaporation temperatures during cooling operation. The indoor return air flows through the two heat exchangers with high and low evaporation temperatures in sequence, thereby achieving step-by-step cooling and dehumidification of the return air, reducing the irreversible loss in the heat exchange process, and improving the cooling energy efficiency ratio and dehumidification capacity per unit energy consumption.

[0112] 3. This utility model is equipped with a circulating water tank, a refrigerant-water heat exchanger, and corresponding switching valves, so that the system can effectively produce hot water to meet domestic hot water needs in any operating mode, fully recover the condensation heat of the air conditioner, improve energy utilization, and reduce the cost of additional domestic hot water production, which is economical and environmentally friendly.

[0113] 4. By setting up a refrigerant liquid storage device, efficient operation in different modes can be achieved;

[0114] 5. The multifunctional air-conditioning system described in the present invention is relatively simple, reliable and low-cost.

[0115] like Figure 1-9 The air conditioning and hot water integrated machine with temperature control and dehumidification function of the utility model shown in the figure includes a compressor 10, an outdoor heat exchanger 20, a first throttling device 31, a second throttling device 32, a third throttling device 33 and a fourth throttling device 34, a first indoor heat exchanger 41, a second indoor heat exchanger 42, a first four-way valve 51, a second four-way valve 52, a one-way valve 70, an outdoor fan 61, an indoor fan 62, a refrigerant-water heat exchanger 90 and a liquid storage device 80 for adjusting the refrigerant filling amount, etc.

[0116] The compressor 10 of the present invention has two compression cylinders and two air intake ports: a first air intake port 12 and a second air intake port 13. The two compression cylinders share one exhaust port 11, and the exhaust gases are mixed and discharged. The D pipe of the first four-way valve 51 is connected to the exhaust port 11 of the compressor, the C pipe is connected to one end of the outdoor heat exchanger 20, the S pipe is connected to the first air intake port 12 of the compressor, and the E pipe is connected to one end of the first indoor heat exchanger 41. The D pipe of the second four-way valve 52 is connected to the exhaust port 11 of the compressor, the E pipe is connected to one end of the second indoor heat exchanger 42, the S pipe is connected to the second air intake port 13 of the compressor, and the C pipe is connected to the outlet of the one-way valve 70. The one-way valve 70 is connected in series between the first air intake pipeline of the compressor and the C port of the second four-way valve 52.

[0117] The exhaust port of the compressor 10 of the present invention is connected to the D tube of the first four-way valve 51 and the D tube of the second four-way valve 52, respectively, and the intake port is connected to the S tube of the first four-way valve 51 and the second four-way valve 52, respectively. The C tube of the first four-way valve 51 is connected to one end of the outdoor heat exchanger, and the other end of the outdoor heat exchanger is connected to the first throttling device 31. The liquid storage device 80 for adjusting the refrigerant charge has three connecting pipe interfaces respectively connected to the four throttling devices, wherein the three connecting pipes of the liquid storage tank are respectively inserted into the bottom of the liquid storage tank. The first indoor heat exchanger 41 is connected to the second throttling device 32 and the first four-way valve 51, and the second indoor heat exchanger is respectively connected to the third throttling device 33 and the E tube of the second four-way valve. The refrigerant circulation pipeline of the refrigerant-water heat exchanger is respectively connected to the E tube of the second four-way valve 52 and the fourth throttling device 34. The utility model can realize multiple operation modes such as independent cooling, heating, dehumidification, hot water production, cooling + hot water production, heating + hot water production, dehumidification + hot water production, etc. by controlling the throttling device and the first and second four-way valves.

[0118] In some embodiments,

[0119] It also includes an auxiliary compression cylinder and a fourteenth pipeline 114. The auxiliary compression cylinder has a third air intake port 14. The third air intake port 14 is connected to the internal upper end of the liquid storage device 80 through the fourteenth pipeline 114. The gas discharged from the auxiliary compression cylinder is mixed with the gas discharged from the first cylinder and the gas discharged from the second cylinder in the casing of the compressor and is discharged through the first pipeline 101 and / or the ninth pipeline 109.

[0120] Figure 8 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 air intakes, and one air exhaust. The original liquid storage device 80 in the main embodiment system also serves as the flash generator of this embodiment. The air intake of the auxiliary compression cylinder is connected to the liquid storage device 80 to absorb the refrigerant gas flashed from the liquid storage device 80. This 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 switching and operation of the valves in different operating modes are similar to those of the main embodiment.

[0121] In some embodiments,

[0122] The first indoor heat exchanger 41, the second indoor heat exchanger 42, the third throttling device 33 and the indoor fan 62 constitute at least a partial structure of a group of indoor unit units, and there are multiple indoor unit units, and the first indoor heat exchanger 41 of each indoor unit unit is connected between the first four-way valve 51 and the liquid storage device 80, and the second indoor heat exchanger 42 of each indoor unit unit is connected between the second four-way valve 52 and the liquid storage device 80.

[0123] Figure 9 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 a corresponding throttling device: a third throttling device 33), 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 the valves in different operating modes are similar to those of the main embodiment.

[0124] The present invention also provides a control method for the aforementioned integrated air-conditioning and hot water machine with temperature control and dehumidification functions, wherein:

[0125] When the integrated air conditioner and hot water machine with temperature control and dehumidification function includes a first four-way valve 51, a second four-way valve 52, a first throttling device 31, a second throttling device 32, a third throttling device 33, and a fourth throttling device 34, the control method includes:

[0126] Detection steps to detect the required operating mode of the system;

[0127] a determination step of determining 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, or a dehumidification + hot water mode;

[0128] The control step controls the switching of the first four-way valve 51 and the second four-way valve 52, and controls the on and off of the first throttling device 31, the second throttling device 32, the third throttling device 33 and the fourth throttling device 34 and adjusts the size of the opening according to the requirements of different operating modes.

[0129] The utility model integrates the refrigerant-water heat exchanger 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 four 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, that is, it can realize the modes of cooling + hot water making, heating + hot water making and dehumidification + hot water making 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 first and second indoor heat exchangers, and the other end of the refrigerant-water heat exchanger 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 under multiple operating modes, the circulation amount of the refrigerant is adjusted by 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 in the 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 in the 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.

[0130] In some embodiments,

[0131] The control step, when the required operating mode of the system is the cooling mode, controls the first four-way valve 51 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, controls the second four-way valve 52 so that 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', controls the fourth throttling device 34 to be closed, controls the first throttling device 31, the second throttling device 32 and the third throttling device 33 to be opened, and controls the opening sizes of the three to vary;

[0132] When the required operating mode of the system is the heating mode, the first four-way valve 51 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 second four-way valve 52 is controlled so that the second D end D' is connected to the second E end E', and the second C end C' is connected to the second S end S'. The fourth throttling device 34 is controlled to be closed, and the first throttling device 31, the second throttling device 32, and the third throttling device 33 are all controlled to be opened, and the opening sizes of the three are controlled to change.

[0133] When the required operating mode of the system is temperature control and dehumidification, the first four-way valve 51 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 second four-way valve 52 is controlled so that the second D end D' is connected to the second E end E', and when connected to the second C end C', it is connected to the second S end S'. The fourth throttling device 34 is controlled to be closed, and the first throttling device 31, the second throttling device 32, and the third throttling device 33 are all controlled to be opened, and the opening sizes of the three are controlled to change.

[0134] When the required operating mode of the system is the cooling + hot water mode, the first four-way valve 51 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 second four-way valve 52 is controlled so that 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'. The first throttling device 31 is closed, and the second throttling device 32, the third throttling device 33, and the fourth throttling device 34 are all opened and their opening sizes are controlled to change, so as to adjust the liquid level in the liquid storage device 80.

[0135] When the required operating mode of the system is heating + hot water mode, the first four-way valve 51 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 second four-way valve 52 is controlled so that 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'. The third throttling device 33 is closed, and the first throttling device 31, the second throttling device 32 and the fourth throttling device 34 are all controlled to be opened and their opening sizes are controlled to change, so as to adjust the liquid level in the liquid storage device 80.

[0136] like Figure 1 As shown, when only the cooling mode is running, the first four-way valve 51 and the second four-way valve 52 are both powered off, and the fourth throttling device 34 (preferably an electronic expansion valve) is closed. At this time, the refrigerant-water heat exchanger does not work. Figure 1 As shown, the first four-way valve 51 and the second four-way valve 52 are both connected with the D tube and the C tube, and the S tube and the E tube. The high-temperature and high-pressure refrigerant gas discharged from the compressor enters the outdoor heat exchanger 20 through the D pipe and C pipe of the first four-way valve 51, releases heat and condenses into high-pressure liquid refrigerant in the outdoor heat exchanger 20, and then enters the liquid storage device 80 (liquid storage tank) after throttling and reducing the pressure by the first throttling device 31. The liquid saturated refrigerant separated from the liquid storage tank is throttled and reduced in pressure by the second throttling device 32 and then divided into two paths: one path evaporates and absorbs heat through the first indoor heat exchanger 41 and then enters the first suction port 12 of the compressor through the E end and S end of the first four-way valve 51; the other path of refrigerant is further throttled and reduced in pressure by the third throttling device 33 and then enters the second indoor heat exchanger 42. After the heat exchange is completed, it enters the second suction port 13 of the compressor through the E and S pipes of the second four-way valve 52. The refrigerants entering the first and second suction ports of the compressor are compressed in their respective compression cylinders and then exhausted and mixed and discharged, thereby completing the entire refrigeration cycle.

[0137] In this mode, the first indoor heat exchanger 41 and the second indoor heat exchanger 42 serve as a high-temperature evaporator and a low-temperature evaporator respectively. The high-temperature evaporator is mainly responsible for the sensible heat load, and the low-temperature evaporator is mainly responsible for the latent heat load. The evaporation process uses step-by-step heat exchange to reduce the heat exchange temperature difference, reduce the irreversible loss of the heat exchange process, and improve the energy efficiency of the system.

[0138] When the air conditioner of the present invention is operating in refrigeration mode, when all four throttling devices are electronic expansion valves, by adjusting the opening of the electronic expansion valve, the frequency of the compressor, and the rotational speed of the first and second fans, the cooling capacity and dehumidification capacity can be adjusted, and the operation energy saving optimization can be achieved, and the return air temperature and humidity can be controlled.

[0139] like Figure 2As shown, when operating in heating mode only, the first four-way valve 51 and the second four-way valve 52 are both energized, the fourth throttling device 34 is closed, and the refrigerant-water heat exchanger is inoperative. Both the first four-way valve 51 and the second four-way valve 52 have the D and E pipes open, and the C and S pipes open. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 is split into two paths. One path passes through the D and E pipes of the first four-way valve 51 and enters the first indoor heat exchanger 41, where it condenses and releases heat to form a liquid. The other path passes through the D and E pipes of the second four-way valve 52 and enters the second indoor heat exchanger 42, where it condenses and releases heat to form a liquid. The refrigerant is then throttled and depressurized by the third throttling device 33 (at this point, the third throttling device 33 primarily serves as a flow distributor) and mixed with the refrigerant exiting the first indoor heat exchanger 41. The mixed refrigerant, after throttling and depressurizing by the second throttling device 32, enters the liquid storage device 80. The liquid saturated refrigerant exiting the liquid storage device 80 is further throttled and reduced in pressure by the first throttling device 31 before entering the outdoor heat exchanger 20, where it evaporates and absorbs heat, transforming into a gaseous state. The gaseous refrigerant passes through the C and S pipes of the first four-way valve 51 and is subsequently split into two paths: one path directly enters the first intake port 12 of the compressor 10, while the other path passes through the one-way valve 70 and enters the second intake port 13 of the compressor. After the refrigerants entering the first and second intake ports of the compressor are compressed in their respective compression cylinders, the exhaust gas is mixed and discharged, completing the heating cycle.

[0140] like Figure 3 As shown, when operating in temperature-controlled dehumidification mode only, the first four-way valve 51 is de-energized, the second four-way valve 52 is energized, the fourth throttling device 34 is closed, and the refrigerant-water heat exchanger is inoperative. The D and C tubes of the first four-way valve 51 are connected, and the E and S tubes are connected. The D and E tubes of the second four-way valve 52 are connected, and the S and C tubes are connected. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor is split into two paths. One path passes through pipes D and C of the first four-way valve 51 to enter the outdoor heat exchanger 20 for heat exchange, where it condenses and releases heat to become liquid refrigerant. It then passes through the first throttle device 31 for throttling and pressure reduction before entering the liquid storage device 80. The liquid saturated refrigerant exiting the liquid storage device 80 is further throttled and pressure reduced by the second throttle device 32. The other path of refrigerant discharged from the compressor passes through pipes D and E of the second four-way valve 52 to enter the second indoor heat exchanger 42 for heat exchange, where it condenses and releases heat to become liquid refrigerant. It then passes through the third throttle device 33 for throttling and pressure reduction before mixing with the refrigerant exiting the second throttle device 32. The mixed refrigerant enters the first indoor heat exchanger 41, where it evaporates and absorbs heat to become a gaseous refrigerant. This gaseous refrigerant passes through pipes E and S of the first four-way valve 51 and then splits into two paths: one path is directly drawn into the compressor's first intake port 12, while the other path passes through the one-way valve 70 and enters the compressor's second intake port 13. After the refrigerant entering the first and second suction ports of the compressor is compressed in their respective compression cylinders, the exhaust gases are mixed and then discharged, thus completing the entire temperature control and dehumidification cycle.

[0141] When the air conditioner of the present invention is operating in the temperature control and dehumidification mode, when all four throttling devices are electronic expansion valves, the opening of the electronic expansion valve is adjusted to achieve the distribution of the refrigerant flow between the outdoor heat exchanger 20 and the second indoor heat exchanger 42. Combined with the adjustment of the frequency of the compressor and the speed of the first and second fans, the indoor dehumidification amount and the outlet air temperature can be adjusted, and the operation energy saving optimization can be achieved, and the return air temperature and humidity can be controlled.

[0142] In this mode, valve switching allows dehumidification without cooling the air. The first indoor heat exchanger 41 acts as a separate evaporator, cooling and dehumidifying the indoor air. The second indoor heat exchanger 42 acts as a low-temperature condenser, reheating the cooled and dehumidified air to increase the supply air temperature and improve indoor comfort.

[0143] like Figure 4 As shown, when operating in hot water mode only, the first four-way valve 51 and the second four-way valve 52 are both energized, and the second throttling device 32 and the third throttling device 33 are both closed. The D and E tubes of the first four-way valve 51 are connected, and the C and S tubes are connected. The D and E tubes of the second four-way valve 52 are connected, and the C and S tubes are connected. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 enters the refrigerant-water heat exchanger 90 through the D and E tubes of the second four-way valve 52. The high-temperature, high-pressure refrigerant releases heat in the refrigerant-water heat exchanger, becoming a high-pressure subcooled liquid. It is then throttled and depressurized by the fourth throttling device 34 and enters the liquid storage device 80. The saturated liquid refrigerant from the liquid storage tank is throttled and depressurized by the first throttling device 31, then enters the outdoor heat exchanger 20, where it evaporates and absorbs heat to return to a gaseous state. The gaseous refrigerant passes through the C and S pipes of the first four-way valve 51 and is then divided into two paths. One path directly enters the first air intake 12 of the compressor 10, and the other path passes through the one-way valve 70 and enters the second air intake 13 of the compressor. After the refrigerant entering the first and second air intakes of the compressor is compressed in their respective compression cylinders, the exhaust gas is mixed and discharged, thus completing the entire hot water heating cycle. On the water circulation side, the water in the refrigerant-water heat exchanger exchanges heat with the high-temperature and high-pressure refrigerant discharged from the compressor. The water is heated to the target temperature and then delivered to the user end for use through the refrigerant-water heat exchanger outlet 92. The refrigerant-water heat exchanger water inlet 91 is connected to the water pipe network, so that the water in the refrigerant-water heat exchanger is maintained at a certain water level.

[0144] When heating water, the air conditioner of this utility model adjusts the frequency of the variable frequency water pump to adjust the water outlet temperature of the water tank, thus switching the heating mode of the heat pump water heater. When the water flow rate is sufficiently low, the water outlet temperature of the casing is relatively high, and the water is directly heated to the set temperature. The system can be regarded as a single-stage heating heat pump water heater, and the hot water is used immediately after it is taken. When the water pump output power is high and the water flow rate is large, the water outlet temperature of the refrigerant-water heat exchanger is relatively low. However, the water in the water tank is circulated and heated in the refrigerant-water heat exchanger until it reaches the target temperature, and then delivered to the terminal through the water outlet 106. At this time, the system can be regarded as a circulating heating heat pump water heater.

[0145] like Figure 5 As shown, in cooling + hot water mode, the first four-way valve 51 is de-energized, the second four-way valve 52 is energized, and both the first throttling device 31 and the third throttling device 33 are closed, thus operating the refrigerant-water heat exchanger. The D and C tubes of the first four-way valve 51 are connected, and the S and E tubes are connected. The D and E tubes of the second four-way valve 52 are connected, and the S and C tubes are connected. The high-temperature, high-pressure refrigerant gas discharged from compressor 10 passes through pipes D and E of second four-way valve 52 and enters refrigerant-water heat exchanger 90 to exchange heat with water. There, it releases heat and condenses into high-pressure, subcooled liquid refrigerant. It then passes through fourth throttling device 34 for throttling and pressure reduction before entering liquid storage device 80. The saturated liquid refrigerant separated from liquid storage device 80 is further throttled and pressure reduced by second throttling device 32 before evaporating and absorbing heat in first indoor heat exchanger 41. It then passes through ports E and S of first four-way valve 51 and is split into two paths: one path directly enters the compressor's first intake port 12; the other path passes through check valve 70 and enters pipes C and S of second four-way valve 52, entering the compressor's second intake port 13. The refrigerant entering the compressor's first and second intake ports is compressed in their respective compression cylinders before exhaust gas mixes and is discharged, completing the refrigerant cycle. On the water circulation side, the water in the refrigerant-water heat exchanger exchanges heat with the high-temperature and high-pressure refrigerant discharged from the compressor. The water is heated to the target temperature and then enters the water tank from the water outlet 92 of the refrigerant-water heat exchanger. The water in the water tank is circulated and heated repeatedly to the target temperature and then sent to the user end for use through the water tank outlet 96. The water tank inlet 95 is connected to the water pipeline network, so that the water in the refrigerant-water heat exchanger is maintained at a certain water level.

[0146] In this mode, the refrigerant-water heat exchanger 90 is equivalent to a condenser, and since the first throttling device 31 is closed, the outdoor heat exchanger 20 does not work, and the hot water produced can meet the domestic water needs, which is energy-saving and environmentally friendly.

[0147] In some embodiments,

[0148] When the air conditioning and water heating integrated unit also includes a water tank and a water pump, and when the required operating mode of the system is heating + hot water mode,

[0149] The first four-way valve 51 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 second four-way valve 52 is controlled so that the second D end D' is connected to the second E end E', and the second C end C' is connected to the second S end S'. The first throttling device 31, the second throttling device 32, the third throttling device 33, and the fourth throttling device 34 are all controlled to open and their opening sizes are controlled to vary, so as to adjust the liquid level in the liquid storage device 80.

[0150] The detecting step also detects the water temperature in the water tank and the tube temperature of the indoor heat exchanger;

[0151] When the all-in-one machine is turned on and the water temperature is less than a first preset value, the speed of the water pump 121 is controlled to be less than the first preset speed, and when the pipe temperature is less than a second preset value, the indoor fan 62 is controlled to stop, and when the pipe temperature is greater than or equal to the second preset value, the indoor fan 62 is controlled to run and its speed is controlled to be less than the second preset speed;

[0152] When the water temperature is greater than or equal to the first preset value, the rotation speed of the water pump 121 is controlled to be greater than or equal to the first preset rotation speed, and the indoor fan 62 is operated and its rotation speed is controlled to be greater than or equal to the second preset rotation speed.

[0153] like Figure 6As shown, during heating mode operation, both the first four-way valve 51 and the second four-way valve 52 are energized, and the third throttling device 33 is closed. The first four-way valve 51 connects pipes D and E, and pipes C and S. The second four-way valve 52 connects pipes D and E, and pipes S and C. When the unit is initially powered on, the indoor fan is not turned on until the internal pipes warm up. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 is divided into three paths. One path passes through the D and E pipes of the first four-way valve 51 and enters the first indoor heat exchanger 41, where it condenses and releases heat to a liquid state. It then passes through the second throttle device 32 for throttling and pressure reduction before entering the liquid storage device 80. The second path passes through the D and E pipes of the second four-way valve 52 and enters the second indoor heat exchanger 42 for heat exchange. It then passes through the third throttle device 33, where it mixes with the refrigerant exiting the first indoor heat exchanger 41. It then passes through the second throttle device 32 for throttling and pressure reduction before entering the liquid storage device 80. The third path passes through the D and E pipes of the second four-way valve 52 and enters the refrigerant-water heat exchanger 90, where it exchanges heat with the water in the refrigerant-water heat exchanger, heating it. After the heat exchange is complete, it passes through the fourth throttle device 34 for throttling and pressure reduction before entering the liquid storage device 80. The saturated liquid refrigerant exiting the liquid storage device 80 is further throttled and pressure reduced by the first throttle device 31 before entering the outdoor heat exchanger 20, where it evaporates and absorbs heat to a gaseous state. The gaseous refrigerant passes through the C and S pipes of the first four-way valve 51 and is then split into two paths: one path directly enters the first intake port 12 of the compressor 10, and the other path passes through the one-way valve 70 and enters the second intake port 13 of the compressor. After the refrigerant entering the first and second intake ports of the compressor is compressed in their respective compression cylinders, the exhaust gas is mixed and discharged, thus completing the entire heating and hot water cycle.

[0154] On the water circulation side, the water in the water tank is pumped to the refrigerant-water heat exchanger 90 to exchange heat with the high-temperature and high-pressure refrigerant discharged from the compressor. The water is heated to the target temperature and then delivered to the user end for use from the water tank outlet 96. The water tank inlet 95 is connected to the water pipe network to complete the entire heating and hot water cycle. It should be noted that in this mode, when the system is just turned on, when the water temperature is lower than the preset value, the water flow of the circulating water pump is reduced. When the indoor heat exchanger pipe temperature is lower than the preset value, the indoor fan 62 does not rotate. When it is higher than the preset value, the indoor fan 62 runs at a low speed to ensure the system exhaust saturation temperature and heating supply air temperature. When the water temperature reaches the preset value, the circulating water flow and the internal fan speed are increased to improve the system operation performance.

[0155] 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 unit with temperature control and dehumidification function of the utility model is environmentally friendly and efficient refrigerant such as R32 and R290.

[0156] In some embodiments,

[0157] 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;

[0158] In the control step, if it is a hot water only mode, the first four-way valve 51 is controlled to connect the first D end D with the first E end E, and the first C end C with the first S end S; the second four-way valve 52 is controlled to connect the second D end D' with the second E end E', and the second C end C' with the second S end S'; the second throttling device 32 and the third throttling device 33 are both closed; the first throttling device 31 and the fourth throttling device 34 are controlled to open and the opening sizes of the two are controlled to change.

[0159] like Figure 4 When operating in hot water only mode, the first four-way valve 51 and the second four-way valve 52 are both energized, and the second throttling device 32 and the third throttling device 33 are closed. The D and E tubes of the first four-way valve 51 are connected, and the C and S tubes are connected. The D and E tubes of the second four-way valve 52 are connected, and the C and S tubes are connected. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 enters the refrigerant-water heat exchanger 90 through the D and E tubes of the second four-way valve 52. The high-temperature, high-pressure refrigerant releases heat in the refrigerant-water heat exchanger and becomes a high-pressure subcooled liquid. It is then throttled and depressurized by the fourth throttling device 34 and enters the liquid storage device 80. The saturated liquid refrigerant from the liquid storage tank is throttled and depressurized by the first throttling device 31 and then enters the outdoor heat exchanger 20, where it evaporates and absorbs heat to become a gaseous state. The gaseous refrigerant passes through the C and S pipes of the first four-way valve 51 and is then split into two paths: one path directly enters the first air intake 12 of the compressor 10, and the other path passes through the one-way valve 70 and enters the second air intake 13 of the compressor. After the refrigerant entering the first and second air intakes of the compressor is compressed in their respective compression cylinders, the exhaust gas is mixed and discharged, thus completing the entire hot water heating cycle. On the water circulation side, the water in the refrigerant-water heat exchanger exchanges heat with the high-temperature, high-pressure refrigerant discharged from the compressor. The water is heated to the target temperature and then delivered to the user end through the water tank outlet 96. The water tank inlet 95 is connected to the water pipe network, thereby maintaining the water level in the refrigerant-water heat exchanger.

[0160] When the air conditioner of the present invention is heating water, when all four throttling devices are electronic expansion valves, the opening of the first and fourth throttling devices is adjusted to realize the distribution of the refrigerant flow between the refrigerant-water heat exchanger 90 and the outdoor heat exchanger 20, thereby realizing the regulation of the water supply temperature.

[0161] In some embodiments,

[0162] When the air conditioning and hot water integrated unit also includes a water tank and a water pump, and when the required operating mode of the system is temperature control dehumidification + hot water mode,

[0163] The first four-way valve 51 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 second four-way valve 52 is controlled so that the second D end D' is connected to the second E end E', and the second C end C' is connected to the second S end S'. The first throttling device 31, the second throttling device 32, the third throttling device 33, and the fourth throttling device 34 are all controlled to open and their openings are controlled to vary, so as to adjust the liquid level in the liquid storage device 80.

[0164] The detecting step also detects the water temperature in the water tank and the tube temperature of the indoor heat exchanger;

[0165] When the all-in-one machine is turned on and the water temperature is less than a first preset value, the speed of the water pump 121 is controlled to be less than the first preset speed, and when the pipe temperature is less than a second preset value, the indoor fan 62 is controlled to stop, and when the pipe temperature is greater than or equal to the second preset value, the indoor fan 62 is controlled to run and its speed is controlled to be less than the second preset speed;

[0166] When the water temperature is greater than or equal to the first preset value, the rotation speed of the water pump 121 is controlled to be greater than or equal to the first preset rotation speed, and the indoor fan 62 is operated and its rotation speed is controlled to be greater than or equal to the second preset rotation speed.

[0167] like Figure 7As shown, during hot water production in the temperature control and dehumidification mode, the first four-way valve 51 is de-energized, the second four-way valve 52 is energized, and the fourth throttling device 34 is open. The D and C tubes of the first four-way valve 51 are connected, and the E and S tubes are connected. The D and E tubes of the second four-way valve 52 are connected, and the S and C tubes are connected. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor is divided into three paths. One path enters the outdoor heat exchanger 20 through the D and C pipes of the first four-way valve 51 for heat exchange, condenses and releases heat to become liquid refrigerant, and then enters the liquid storage device 80 after throttling and reducing the pressure through the first throttling device 31. The other path of refrigerant coming out of the exhaust port 11 of the compressor completes heat exchange in the refrigerant-water heat exchanger 90, and is further throttled and reduced in pressure through the fourth throttling device 34. The throttled refrigerant enters the liquid storage device 80, and the liquid saturated refrigerant coming out of the liquid storage device 80 is further throttled and reduced in pressure through the second throttling device 32; the third path of refrigerant discharged from the compressor enters the second indoor heat exchanger 42 through the D and E pipes of the second four-way valve 52 for heat exchange, condenses and releases heat to become liquid refrigerant, and then is throttled and reduced in pressure through the third throttling device 33, and finally mixes with the refrigerant coming out of the second throttling device 32. The mixed refrigerant enters the first indoor heat exchanger 41, evaporates and absorbs heat to become gaseous. The gaseous refrigerant passes through the E and S pipes of the first four-way valve 51 and is then divided into two paths. One path is directly sucked into the first air intake port 12 of the compressor, and the other path passes through the one-way valve 70 and the C and S pipes of the second four-way valve 52 in sequence and enters the second air intake port 13 of the compressor. After the refrigerant entering the first and second air intake ports of the compressor is compressed in their respective compression cylinders, the exhaust gas is mixed and then discharged. On the water circulation side, the water in the water tank is pumped to the refrigerant-water heat exchanger 90 to exchange heat with the high-temperature and high-pressure refrigerant discharged from the compressor. The water is heated to the target temperature and then delivered to the user end for use through the water tank outlet 96. The water tank inlet 95 is connected to the water pipe network to complete the entire temperature control, dehumidification and hot water production cycle. It should be noted that in this mode, when the system is just turned on, when the water temperature is lower than the preset value, the water flow of the circulating water pump is reduced. When the indoor heat exchanger tube temperature is lower than the preset value, the indoor fan 62 does not rotate. When it is higher than the preset value, the indoor fan 62 runs at a low speed to ensure the system exhaust saturation temperature and heating supply air temperature. When the water temperature reaches the preset value, the circulating water flow and the internal fan speed are increased to improve the system operation performance.

[0168] When the air conditioner of the present invention is operating in the temperature control and dehumidification mode, when the four throttling devices are preferably electronic expansion valves, the opening of the electronic expansion valve is adjusted to achieve the distribution of the refrigerant flow between the outdoor heat exchanger 20 and the second indoor heat exchanger 42. Combined with the adjustment of the frequency of the compressor and the speed of the outdoor fan 61 and the indoor fan 62, the indoor dehumidification amount and the outlet air temperature can be adjusted, and the operation energy saving optimization can be achieved, and the return air temperature and humidity can be controlled.

[0169] This utility model addresses the issue of low indoor air supply temperature when operating in the heating and heating water mode at low water temperatures (and in the dehumidification and heating water mode at low water temperatures) by proposing a corresponding control method. When the system is initially powered on, if the water temperature is below a preset value, the circulating water pump flow rate is reduced. When the indoor heat exchanger tube temperature is below a preset value, the indoor fan 62 does not rotate. When the temperature is above the preset value, the indoor fan 62 operates at a low speed to ensure the system's exhaust saturation temperature and heating air supply temperature. When the water temperature reaches the preset value, the circulating water flow rate and indoor fan speed are increased to improve system performance. The operation in the temperature-controlled dehumidification and heating water mode is similar.

[0170] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. It will be apparent to those skilled in the art that improvements and variations (any combination of the embodiments) may be made without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. An air-conditioning and hot water integrated machine with temperature control and dehumidification functions, characterized by: include: A compressor (10), an outdoor heat exchanger (20), a first indoor heat exchanger (41), a second indoor heat exchanger (42), a refrigerant-water heat exchanger (90) and a liquid storage device (80), wherein the exhaust end of the compressor (10) can be connected to one end of the outdoor heat exchanger (20), or to one end of the first indoor heat exchanger (41), or to one end of the refrigerant-water heat exchanger (90), and the other end of the outdoor heat exchanger (20) is connected to the interior of the liquid storage device (80), and the first indoor heat exchanger (41) The other end of the refrigerant-water heat exchanger (90) is connected to the interior of the liquid storage device (80), one end of the second indoor heat exchanger (42) can be connected to the exhaust end or the intake end of the compressor (10), the other end of the second indoor heat exchanger (42) is connected to the interior of the liquid storage device (80), the other end of the refrigerant-water heat exchanger (90) is connected to the interior of the liquid storage device (80), and the intake end of the compressor (10) can be connected to the one end of the outdoor heat exchanger (20) or to the one end of the first indoor heat exchanger (41).

2. The air-conditioning and hot water integrated machine with temperature control and dehumidification function according to claim 1, characterized in that: The device further comprises a first four-way valve (51), wherein the first four-way valve (51) comprises a first D end (D), a first C end (C), a first S end (S), and a first E end (E), and the first four-way valve (51) 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 (10) through a first pipe (101), the first C end (C) is connected to one end of the outdoor heat exchanger (20) through a second pipe (102), the first S end (S) is connected to the intake end of the compressor (10) through a third pipe (103), and the first E end (E) is connected to one end of the first indoor heat exchanger (41) through a fourth pipe (104).

3. The air-conditioning and hot water integrated machine with temperature control and dehumidification function according to claim 2, characterized in that: The other end of the outdoor heat exchanger (20) is connected to the interior of the liquid storage device (80) through a fifth pipe (105), the other end of the first indoor heat exchanger (41) can be connected to the interior of the liquid storage device (80) through a sixth pipe (106), the other end of the second indoor heat exchanger (42) can be connected to the interior of the liquid storage device (80) through a seventh pipe (107), and the other end of the refrigerant-water heat exchanger (90) can be connected to the interior of the liquid storage device (80) through an eighth pipe (108); The invention also includes a water tank (120) and a water pump (121). The water tank (120) is connected to the interior of the refrigerant-water heat exchanger (90) through a first water path (201). The water tank (120) is connected to the interior of the refrigerant-water heat exchanger (90) through a second water path (202), so that water and refrigerant can exchange heat in the refrigerant-water heat exchanger (90) to produce hot water. The water pump (121) is provided on the first water path (201) and / or the second water path (202).

4. The integrated air-conditioning and hot water machine with temperature control and dehumidification function according to claim 3 is characterized in that: The fifth pipeline (105) is provided with a first throttling device (31), the seventh pipeline (107) is provided with a third throttling device (33), the sixth pipeline (106) and the seventh pipeline (107) are connected to the liquid storage device (80) through the fifteenth pipeline (115) after merging, the fifteenth pipeline (115) is provided with a second throttling device (32), the eighth pipeline (108) is provided with a fourth throttling device (34), and the first indoor heat exchanger (41) and the second indoor heat exchanger (42) are provided on the same air flow path indoors.

5. The integrated air-conditioning and hot water machine with temperature control and dehumidification function according to claim 4, characterized in that: The end of the fifth pipeline (105) connected to the interior of the liquid storage device (80) is the first end, and the first end is higher than the first height of the inner bottom surface of the liquid storage device (80). The end of the fifteenth pipeline (115) connected to the interior of the liquid storage device (80) is the second end, and the second end is higher than the second height of the inner bottom surface of the liquid storage device (80). The end of the eighth pipeline (108) connected to the interior of the liquid storage device (80) is the third end, and the third end is higher than the third height of the inner bottom surface of the liquid storage device (80). The distance between the first end and the top of the liquid storage device (80) is the fourth height, and the fourth height is greater than the first height. The distance between the second end and the top of the liquid storage device (80) is the fifth height, and the fifth height is greater than the second height. The distance between the third end and the top of the liquid storage device (80) is the sixth height, and the sixth height is greater than the third height.

6. The integrated air-conditioning and hot water machine with temperature control and dehumidification function according to claim 5, characterized in that: The liquid storage device (80) 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 conditioner and hot water machine with temperature control and dehumidification function according to claim 4, characterized in that: The invention also includes an indoor fan (62) and an outdoor fan (61), wherein the outdoor fan (61) is opposite to the outdoor heat exchanger (20) so as to drive the airflow to exchange heat with the refrigerant in the outdoor heat exchanger (20), and the indoor fan (62), the first indoor heat exchanger (41) and the second indoor heat exchanger (42) are all located on the same airflow path. Along the flow direction of the airflow, the second indoor heat exchanger (42) is located downstream of the first indoor heat exchanger (41), and the indoor fan (62) is located upstream of the first indoor heat exchanger (41) or downstream of the second indoor heat exchanger (42).

8. The integrated air-conditioning and hot water machine with temperature control and dehumidification function according to claim 4, characterized in that: The invention also includes a second four-way valve (52), wherein the second four-way valve (52) includes a second D end (D'), a second C end (C'), a second S end (S') and a second E end (E'), and the second four-way valve (52) 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 communicated with the second E end (E'); in a second state, the second D end (D') is communicated with the second E end (E'), 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 (10) through a ninth pipeline (109), the second S end (S') can be connected to the intake end of the compressor (10) through a tenth pipeline (110), the second C end (C') can be connected to the third pipeline (103) through an eleventh pipeline (111), and the second E end (E') can be connected to one end of the second indoor heat exchanger (42) through a twelfth pipeline (112).

9. The integrated air-conditioning and hot water machine with temperature control and dehumidification function according to claim 8, characterized in that: The compressor comprises a first cylinder and a second cylinder, the first cylinder having a first air intake port (12), the second cylinder having a second air intake port (13), the first S end (S) of the first four-way valve (51) being connected to the first air intake port (12) of the first cylinder via the third pipeline (103), and the second S end (S') of the second four-way valve (52) being connected to the second air intake port (13) of the second cylinder via the tenth pipeline (110); The thirteenth pipeline (113) is further comprised, one end of the thirteenth pipeline (113) is connected to the twelfth pipeline (112), and the other end of the thirteenth pipeline (113) is connected to the refrigerant-water heat exchanger (90); a one-way valve (70) is provided on the eleventh pipeline (111), and the one-way valve (70) only allows the refrigerant fluid to flow from the third pipeline (103) to the second C end (C') of the second four-way valve (52); The thirteenth pipeline (113) contacts the refrigerant-water heat exchanger (90) through the refrigerant pipeline and exchanges heat with the water in the refrigerant-water heat exchanger (90). One end of the refrigerant-water heat exchanger (90) is one end of the refrigerant pipeline, and the other end of the refrigerant-water heat exchanger (90) is the other end of the refrigerant pipeline. The other end of the refrigerant pipeline is connected to the eighth pipeline (108), and the refrigerant pipeline forms at least a partial structure of the refrigerant-water heat exchanger.

10. The integrated air-conditioning and hot water machine with temperature control and dehumidification function according to claim 9, characterized in that: The compressor further comprises an auxiliary compression cylinder and a fourteenth pipeline (114), wherein the auxiliary compression cylinder has a third air intake port (14), and the third air intake port (14) is connected to the internal upper end of the liquid storage device (80) through the fourteenth pipeline (114); the gas discharged from the auxiliary compression cylinder is mixed with the gas discharged from the first cylinder and the gas discharged from the second cylinder in the shell of the compressor and discharged through the first pipeline (101) and / or the ninth pipeline (109).

11. The integrated air-conditioning and hot water machine with temperature control and dehumidification function according to claim 8, characterized in that: The first indoor heat exchanger (41), the second indoor heat exchanger (42), the third throttling device (33) and the indoor fan (62) constitute at least a partial structure of a group of indoor unit units, and there are multiple indoor unit units, and the first indoor heat exchanger (41) of each indoor unit unit is connected between the first four-way valve (51) and the liquid storage device (80), and the second indoor heat exchanger (42) of each indoor unit unit is connected between the second four-way valve (52) and the liquid storage device (80).

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