Air conditioning apparatus and control method for air conditioning apparatus

Abstract

The application relates to the technical field of smart homes, and discloses an air conditioning device, which comprises an outdoor heat exchange system, a main refrigerant circulation loop formed by connecting a compressor, a hot water tank, a first throttling element, an outdoor heat exchanger, an ejector, a cold water tank and a liquid storage tank, the cold water tank comprises a first cold water tank and a second cold water tank, the first cold water tank is located in the main refrigerant circulation loop, the second cold water tank is located in a secondary refrigerant circulation loop formed by connecting the liquid storage tank, a second throttling element, the second cold water tank and the ejector, an indoor water circulation system comprises an indoor heat exchanger, the indoor heat exchanger is connected with the cold water tank through a cold water pipeline to form a cold water circulation loop, and the indoor heat exchanger is connected with the hot water tank through a hot water pipeline to form a hot water circulation loop; the water outlet and the water inlet of the first and second cold water tanks are connected to the cold water circulation loop through a first control valve, and the first control valve is adjusted to adjust the water inflow and outflow of the first and second cold water tanks. The device helps to improve the energy efficiency of the air conditioning device. The application further discloses a control method for the air conditioning device.

Description

Technical Field

[0001] The present application relates to the field of smart home technology, for example, to an air-conditioning device and a control method for the air-conditioning device. Background Art

[0002] Traditional air conditioners use refrigerants to regulate indoor temperature and humidity, but they cannot meet users' needs for year-round, uninterrupted heating and cooling with heat recovery. To achieve this, multiple compressors and outdoor heat balancers are typically used to accommodate multi-mode scenarios, with air injection and enthalpy increase being used to compensate for the lack of low-temperature heating conditions in winter.

[0003] The air conditioning system in the related art includes a compressor, a four-way reversing valve, an outdoor unit, and a water-fluorine heat exchanger. The indoor heat exchanger is divided into an indoor heating and dehumidification heat recovery terminal and an indoor cooling and dehumidification terminal. The water-fluorine heat exchanger is divided into a first water-fluorine heat exchanger and a second water-fluorine heat exchanger. The first mode is cooling mode, the second mode is heating mode, and the third mode is dehumidification heat recovery mode. The first water-fluorine heat exchanger is located at the outlet of the compressor and is connected to the indoor heating and dehumidification heat recovery terminal of the domestic hot water tank via a hot water three-way valve.

[0004] During the implementation of the embodiments of the present disclosure, it was found that at least the following problems exist in the related art:

[0005] In the related art, the energy efficiency of the air-conditioning device is low.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] Embodiments of the present disclosure provide an air-conditioning device and a control method for the air-conditioning device, so as to improve the energy efficiency of the air-conditioning device.

[0009] In some embodiments, the air conditioning device comprises:

[0010] The outdoor heat exchange system includes a main refrigerant circulation loop formed by sequentially connecting a compressor, a hot water tank, a first throttling element, an outdoor heat exchanger, an ejector, a cold water tank, and a liquid storage tank;

[0011] The cold water tank includes a first cold water tank and a second cold water tank; the first cold water tank is located in the main refrigerant circulation loop; the second cold water tank is located in the secondary refrigerant circulation loop; the secondary refrigerant circulation loop includes a liquid storage tank, a second throttling element, a second cold water tank, and an ejector connected in sequence;

[0012] The indoor water circulation system includes an indoor heat exchanger, which is connected to a cold water tank through a cold water pipe to form a cold water circulation loop; and is connected to a hot water tank through a hot water pipe to form a hot water circulation loop;

[0013] The water outlet and water inlet of the first cold water tank and the second cold water tank are connected to the cold water circulation loop through the control valve, so that the water inlet and outlet of the first cold water tank and the second cold water tank can be adjusted by adjusting the first control valve.

[0014] Optionally, the first control valve includes:

[0015] A cold water outlet valve is provided on the cold water pipe on the water inlet side of the cold water circulation loop; a first end of the valve is connected to the water outlet of the first cold water tank, a second end is connected to the water outlet of the second cold water tank, and a third end is connected to the first end of the indoor heat exchanger through the cold water pipe;

[0016] The cold water inlet valve is arranged on the cold water pipeline on the outlet side of the cold water circulation loop; its first end is connected to the water inlet of the first cold water tank, the second end is connected to the water inlet of the second cold water tank, and the third end is connected to the second end of the indoor heat exchanger through the cold water pipeline.

[0017] Optionally, the indoor heat exchanger includes: a first indoor heat exchanger and a second indoor heat exchanger, which are arranged in parallel;

[0018] Among them, the first end and the second end of the first indoor heat exchanger are respectively provided with a first three-way valve and a first stop valve connected to the cold water pipeline; the first end and the second end of the second indoor heat exchanger are respectively provided with a second three-way valve and a second stop valve connected to the hot water pipeline; one end of the first three-way valve is connected between the second stop valve and the first end of the second indoor heat exchanger, and one end of the second three-way valve is connected between the first stop valve and the second end of the first indoor heat exchanger.

[0019] Optionally, the water inlet and water outlet of the second cold water tank are also connected to the hot water pipeline through pipelines respectively, and a second control valve is provided at the pipeline connection; by controlling the second control valve, the second cold water tank or hot water tank and the indoor heat exchanger are controlled to be connected.

[0020] Optionally, the second control valve includes a cold and hot water inlet valve and a cold and hot water outlet valve.

[0021] Among them, the hot and cold water outlet valve is arranged in the hot water pipeline on the water inlet side of the hot water circulation loop; its first end is connected to the water outlet of the hot water tank, the second end is connected to the water outlet of the second cold water tank, and the third end is connected to the first end of the indoor heat exchanger through the hot water pipeline.

[0022] The hot and cold water inlet valve is arranged in the cold water pipeline on the water outlet side of the hot water circulation loop; its first end is connected to the water inlet of the hot water tank, the second end is connected to the water inlet of the second cold water tank, and the third end is connected to the second end of the indoor heat exchanger through the hot water pipeline.

[0023] In some embodiments, the method comprises:

[0024] obtaining a target operating mode of the air conditioning device;

[0025] When the target operating mode is not unique, or the target operating mode only includes the cooling mode and the indoor environment is less than the humidity threshold, obtaining a target cooling capacity of the air-conditioning device;

[0026] According to the target cooling capacity, the target state and target opening of the control valve are determined, and the control valve is controlled to execute.

[0027] The air conditioning device and the control method for the air conditioning device provided in the embodiments of the present disclosure can achieve the following technical effects:

[0028] In the disclosed embodiment, two cold water tanks and ejectors are used to form a primary refrigerant circulation loop and a secondary refrigerant circulation loop. This allows the air conditioning system's refrigeration system to achieve stepped cooling, resulting in different cold water temperatures in the two cold water tanks. This helps improve the air conditioning system's energy efficiency and provides multiple temperatures of cold water to the indoor environment.

[0029] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0031] Figure 1 is a structural schematic diagram of an air conditioning device provided by an embodiment of the present disclosure;

[0032] Figure 2 Schematic diagram of the water flow direction of the indoor water circulation system of the air-conditioning device provided by the embodiment of the present disclosure during cooling;

[0033] Figure 3 Schematic diagram of water flow in an indoor water circulation system during heating of an air-conditioning device provided by an embodiment of the present disclosure;

[0034] Figure 4 is a structural schematic diagram of another air conditioning device provided by an embodiment of the present disclosure;

[0035] Figure 5 is a structural schematic diagram of another air conditioning device provided by an embodiment of the present disclosure;

[0036] Figure 6 is a schematic diagram of a control method for an air conditioning device provided by an embodiment of the present disclosure;

[0037] Figure 7 is a schematic diagram of another control method for an air-conditioning device provided by an embodiment of the present disclosure;

[0038] Figure 8 is a schematic diagram of another control method for an air-conditioning device provided by an embodiment of the present disclosure;

[0039] Figure 9 is a schematic diagram of a control device for an air-conditioning device provided by an embodiment of the present disclosure;

[0040] Figure 10 Schematic diagram of another air-conditioning device provided by an embodiment of the present disclosure.

[0041] Reference numerals:

[0042] 11: Compressor; 12: Hot water tank; 13: First throttling element; 14: Outdoor heat exchanger; 15: Ejector; 16: Cold water tank; 161: First cold water tank; 162: Second cold water tank; 17: Liquid storage tank; 18: Second throttling element; 19: Waste heat recovery device; 21: Indoor heat exchanger; 211: First indoor heat exchanger; 212: Second indoor heat exchanger; 31: First three-way valve; 32: First stop valve; 33: Second three-way valve; 34: Second stop valve; 41: Cold water outlet valve; 42: Cold water inlet valve; 51: Cold and hot water outlet valves; 52: Cold and hot water inlet valves; 61: Defrost pipeline; 62: Refrigerant branch; 71: First defrost valve; 72: Second defrost valve; 100: Processor; 101: Memory; 102: Communication interface; 103: Bus. DETAILED DESCRIPTION

[0043] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0044] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0045] Unless otherwise stated, the term "plurality" means two or more.

[0046] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0047] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0048] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0049] Combine Figure 1 The air conditioning device includes an outdoor heat exchange system and an indoor water circulation system. The outdoor heat exchange system includes a compressor 11, a hot water tank 12, a first throttling element 13, an outdoor heat exchanger 14, an ejector 15, a cold water tank 16, and a liquid storage tank 17. The cold water tank 16 includes a first cold water tank 161 and a second cold water tank 162. The indoor water circulation system includes an indoor heat exchanger 21, which is connected to the cold water tank 16 via a cold water pipeline to form a cold water circulation loop; the indoor heat exchanger 21 is connected to the hot water tank 12 via a hot water pipeline to form a hot water circulation loop. The water outlet and water inlet of the first cold water tank 161 and the second cold water tank 162 are both connected to the cold water circulation loop through a first control valve, so that the water inlet and outlet of the first cold water tank 161 and the second cold water tank 162 can be adjusted by adjusting the first control valve.

[0050] The exhaust port of compressor 11 is connected to the first inlet of the hot water tank, and the first outlet of hot water tank 12 is connected to the first inlet of ejector 15 via first throttling element 13 and outdoor heat exchanger 14. The outlet of ejector 15 is connected to the first inlet of first cold water tank 161 and then to the inlet of liquid storage tank 17. The first outlet of liquid storage tank 17 is connected to the return air port of compressor 1, thus forming a primary refrigerant circulation loop. Liquid storage tank 17 includes a second outlet, which is connected to the first inlet of a second cold water tank via a pipeline and second throttling element 18. The first outlet of the second cold water tank is connected to the second inlet of ejector 15, forming a secondary refrigerant circulation loop.

[0051] Combine Figure 2As shown in the figure, when the air conditioner is operating in cooling mode, the outdoor heat exchange system operates as follows: the refrigerant is discharged through the compressor exhaust port and flows through the hot water tank (in cooling mode, the hot water circulation loop of the indoor heat exchange system is shut off, so the refrigerant basically does not exchange heat with the hot water tank). The refrigerant then flows through the first throttling element to the outdoor heat exchanger for heat dissipation (in this case, the outdoor heat exchanger acts as a condenser). After being throttled by the ejector, it flows through the first cold water tank for heat exchange before flowing into the liquid storage tank. With the second throttling element open and throttling, some of the refrigerant in the liquid storage tank flows through the second cold water tank for heat exchange. It then flows into the ejector's second inlet for throttling before returning to the liquid storage tank (i.e., some of the refrigerant flows through the secondary refrigerant circulation loop). Some of the refrigerant in the liquid storage tank flows back to the compressor.

[0052] At the same time, the indoor water circulation system operates as follows: the hot water circulation loop is shut off, and the cold water circulation loop is opened. Cold water flows from the outlet of the cold water tank through the cold water pipeline into the indoor heat exchanger, and then flows back through the pipeline to the water inlet of the cold water tank. Specifically, in scenario 1, cold water can flow from the outlet of the first cold water tank into the indoor heat exchanger and then back to the first cold water tank. In this case, the first control valve connecting the first cold water tank and the cold water pipeline is open (the first control valve is in the first position). In scenario 2, cold water can flow from the outlet of the second cold water tank through the cold water pipeline into the indoor heat exchanger and then back to the second cold water tank. In this case, the first control valve connecting the second cold water tank and the cold water pipeline is open (the first control valve is in the third position). In scenario 3, cold water can flow from the outlets of the first and second cold water tanks through the cold water pipeline into the indoor heat exchanger and then back to the first and second cold water tanks. In this case, all three ends of the first control valve are open (the first control valve is in the second position). The above three situations can be reasonably selected according to the indoor cooling capacity requirements.

[0053] In cooling mode, a portion of the refrigerant's temperature further cools the cold water in the second cold water tank, resulting in a difference in water temperature between the first and second cold water tanks. This fully utilizes the refrigerant's heat to achieve step-by-step adjustment of the cold water temperature, helping to improve indoor cooling efficiency during hot seasons. Furthermore, due to the negative pressure within the ejector, this bypass refrigerant is drawn into the ejector. This bypass refrigerant no longer requires power from the compressor, further reducing the compressor's load and improving the air conditioning system's energy efficiency.

[0054] Combine Figure 3As shown, when the air conditioner is operating in heating mode, the outdoor heat exchanger system operates as follows: refrigerant is discharged through the compressor exhaust and flows through the hot water tank for heat exchange. The cooled refrigerant then flows through the first throttling element into the outdoor heat exchanger (in this case, the outdoor heat exchanger is the evaporator) to absorb heat. After being throttled by the ejector, it flows through the cold water tank and then into the liquid storage tank. (In heating mode, the cold water circulation loop of the indoor heat exchange system is closed, so the refrigerant undergoes minimal heat exchange with the cold water tank.) The refrigerant in the liquid storage tank flows back to the compressor. Meanwhile, the indoor water circulation system operates as follows: the hot water circulation loop is open, while the cold water circulation loop is closed. Hot water flows from the hot water tank outlet into the indoor heat exchanger and then back to the hot water tank through piping. In heating mode, the secondary refrigerant circulation loop is closed.

[0055] The air conditioning system provided by the disclosed embodiments forms a primary refrigerant circulation loop and a secondary refrigerant circulation loop through the arrangement of two cold water tanks and ejectors. This allows the air conditioning system to achieve stepped cooling, resulting in different cold water temperatures in the two cold water tanks. This helps improve the energy efficiency of the air conditioning system and can provide cold water at different temperatures indoors.

[0056] Optionally, the first control valve includes a cold water outlet valve 41 and a cold water inlet valve 42. The cold water outlet valve 41 is disposed on the water inlet side of the cold water circulation loop; its first end is connected to the water outlet of the first cold water tank, its second end is connected to the water outlet of the second cold water tank, and its third end is connected to the first end of the indoor heat exchanger via a cold water pipeline. The cold water inlet valve 42 is disposed on the water outlet side of the cold water circulation loop; its first end is connected to the water inlet of the first cold water tank, its second end is connected to the water inlet of the second cold water tank, and its third end is connected to the second end of the indoor heat exchanger via a cold water pipeline.

[0057] Here, the first control valve is installed on the cold water pipeline, the cold water outlet valve is installed on the water inlet side, and the cold water inlet valve is installed on the water outlet side. The cold water outlet valve and the cold water inlet valve work together to control the cold water supply and return. In addition, the first control valve not only controls the cold water circulation loop but also adjusts its opening. In particular, when the first and second cold water tanks jointly provide cold water, it can adjust the water output and return of the first and second cold water tanks.

[0058] Optionally, the indoor heat exchanger includes a first indoor heat exchanger 211 and a second indoor heat exchanger 212, which are arranged in parallel. A first three-way valve 31 and a first stop valve 32 are respectively provided at the first and second ends of the first indoor heat exchanger, connected to the cold water pipeline. A second three-way valve 33 and a second stop valve 34 are respectively provided at the first and second ends of the second indoor heat exchanger, connected to the hot water pipeline. One end of the first three-way valve is connected between the second stop valve and the first end of the second indoor heat exchanger, and one end of the second three-way valve is connected between the first stop valve and the second end of the first indoor heat exchanger.

[0059] Here, each group of indoor heat exchangers includes two indoor heat exchangers. Through the design of the three-way valve and the stop valve, the two indoor heat exchangers can be controlled to be the evaporator and the condenser respectively. In this way, the indoor air can be dehumidified and then heated to avoid the high humidity in winter affecting the perceived temperature of indoor heating. Alternatively, when the outdoor heat exchanger is defrosted in winter, indoor heating can still be guaranteed, that is, defrosting and heating without stopping the machine can be achieved. In addition, the two indoor heat exchangers can also be evaporators or condensers. In this way, the status of the two indoor heat exchangers is the same, and the heat exchange area is larger than that of a single heat exchanger. This can meet the needs of low-temperature heating or high-temperature cooling. In the embodiment disclosed in the present disclosure, the direction of the air conditioning air flow is to flow through the first indoor heat exchanger first and then through the second indoor heat exchanger. If the air flow direction is opposite, the connection relationship between the first indoor heat exchanger and the second indoor heat exchanger and the cold and hot water pipelines also needs to be adaptively adjusted.

[0060] Combine Figure 4 Optionally, the water inlet and outlet of the second cold water tank 162 are also connected to the hot water pipeline through pipelines, and a second control valve is provided at the pipeline connection; by controlling the second control valve, the second cold water tank or hot water tank and the indoor heat exchanger are controlled to be connected.

[0061] Here, the second cold water tank is connected to both the cold water line and the hot water line. As you can see, when the second cold water tank is connected to the cold water line, the cold water in the second cold water tank can be connected to the indoor heat exchanger independently, or mixed with the cold water from the first cold water tank and then connected to the indoor heat exchanger. However, when connected independently, the water from the first cold water tank cannot be connected to the indoor heat exchanger independently. Therefore, the second cold water tank is connected to the hot water line. This way, when only cooling is required indoors (no hot water is flowing through the hot water line), the first indoor heat exchanger can be connected to the first cold water tank, while the second indoor heat exchanger can be connected to the second cold water tank. This allows the indoor airflow to cool down in the first indoor heat exchanger before exchanging heat with the lower-temperature second indoor heat exchanger, helping to extract moisture from the airflow (i.e., the water vapor temperature more easily reaches the dew point, allowing it to condense into water). This reduces indoor humidity during cooling, improving user comfort.

[0062] Optionally, the second control valve includes a cold and hot water inlet valve 52 and a cold and hot water outlet valve 51 .

[0063] The hot and cold water outlet valve 51 is arranged in the hot water pipeline on the water inlet side of the hot water circulation loop; its first end is connected to the water outlet of the hot water tank, the second end is connected to the water outlet of the second cold water tank, and the third end is connected to the first end of the indoor heat exchanger through the hot water pipeline.

[0064] The hot and cold water inlet valve 52 is arranged in the cold water pipeline on the water outlet side of the hot water circulation loop; its first end is connected to the water inlet of the hot water tank, the second end is connected to the water inlet of the second cold water tank, and the third end is connected to the second end of the indoor heat exchanger through the hot water pipeline.

[0065] When there's no demand for indoor heating, the hot and cold water outlet and inlet valves are adjusted to allow cold water from the second cold water tank to flow through the hot water pipeline to the indoor heat exchanger. This allows cold water of different temperatures to flow into the first and second heat exchangers, respectively. This creates a dual-temperature cold water circulation loop for the air conditioner, achieving simultaneous regulation of indoor temperature and humidity.

[0066] In addition, it should be noted that here, since the air flow of the air conditioner first flows through the first heat exchanger, the second cold water tank is connected to the hot water pipe. If the air flow of the air conditioner first flows through the second heat exchanger, the first cold water tank is connected to the hot water pipe.

[0067] Combine Figure 5 Optionally, the outdoor heat exchange system further includes a defrost line 61 and a refrigerant branch line 62. The defrost line is connected between the compressor exhaust port and the outdoor heat exchanger and is provided with a first defrost valve 71 to control its on / off state. The refrigerant branch line is connected between the hot water tank and the ejector and is provided with a second defrost valve 72 to control its on / off state based on the state of the outdoor heat exchanger.

[0068] To improve defrosting efficiency, a defrost line and a refrigerant bypass are provided. A portion of the refrigerant from the compressor exhaust flows directly into the outdoor heat exchanger through the defrost line, while the refrigerant flowing from the hot water tank is combined with the refrigerant flowing through the outdoor heat exchanger through the bypass before flowing into the ejector. This ensures that the refrigerant flowing through the outdoor heat exchanger is at a higher temperature, facilitating defrosting.

[0069] Based on the aforementioned air conditioning device, combined with Figure 6 As shown, the embodiment of the present disclosure provides a control method for an air conditioning device, comprising:

[0070] S101: The processor obtains a target operating mode of the air-conditioning device.

[0071] S102: When the target operating mode is not unique, or the target operating mode only includes the cooling mode and the indoor environment is less than a humidity threshold, the processor obtains a target cooling capacity of the air-conditioning device.

[0072] S103: The processor determines the target state and target opening of the first control valve according to the target cooling capacity, and controls the first control valve to execute.

[0073] In the embodiment of the present disclosure, the target operating mode of the air-conditioning device includes multiple modes, such as cooling mode, heating mode, reheat dehumidification mode, non-stop defrosting mode, etc. And the target mode may be unique or not. For example, in winter, when in heating mode, the reheat dehumidification mode or non-stop defrosting mode may also be run simultaneously. For example, in summer, when in cooling mode, when the user needs hot water when taking a bath, the target mode also includes heating mode. Here, the target operating mode of the air-conditioning device can be obtained through the user's demand for smart home appliances. For example, the target temperature, operating instructions, etc. of the smart home appliances are obtained; wherein the smart home appliances include terminal devices connected to cold water and hot water, such as air conditioners, water heaters, and floor heating equipment.

[0074] A unique target operating mode means that the status of each indoor heat exchanger group is consistent. If there are multiple indoor heat exchangers, the status of all indoor heat exchangers is consistent. This means that all indoor heat exchangers are evaporators or all indoor heat exchangers are condensers. Alternatively, a unique target operating mode means that when the air conditioner is connected to other terminal devices, the cooling and heating requirements of the terminal devices and the indoor heat exchangers are consistent. A non-unique target operating mode indicates that the indoor heat exchanger contains both an evaporator and a condenser. In this case, the cold water circulation loop in the indoor water circulation system is open. If the target operating mode only includes cooling mode and the indoor ambient humidity is below the humidity threshold, the cold water circulation loop in the indoor water circulation system must also be open.

[0075] In both of the above situations, there is a demand for cooling in the indoor environment, which involves the control of the cold water circulation loop, and more specifically, the control of the first control valve. Therefore, in the embodiment of the present disclosure, when the target operating mode meets the above situation, the target cooling capacity of the air-conditioning device is obtained. The target cooling capacity can be calculated by the current temperature, the target temperature, etc. Then, based on the target cooling capacity, the target state and the target opening of the first control valve are determined. As mentioned above, there are three situations for the cold water source of refrigeration. The temperature of the cold water source in different situations is different, and the cooling capacity provided is different. Therefore, based on the target cooling capacity, the matching cold water source can be determined, that is, the different conduction directions of the first control valve can be determined to achieve the control of the cold water source. At the same time, the opening of the conduction direction valve is also determined. In particular, when both the first cold water tank and the second cold water tank provide cold water, the opening of the valve determines the water temperature of the mixed cold water.

[0076] Using the control method for an air conditioner provided in an embodiment of the present disclosure, the state of a first control valve is controlled based on the target cooling capacity to match the cold water source provided by the corresponding first and / or second cold water tanks. The valve opening is also controlled to achieve the desired cold water temperature. This utilizes a stepped cooling method to improve the energy efficiency of the air conditioner.

[0077] Optionally, in step S103, the processor determines a target state and a target opening of the first control valve according to the target cooling capacity, including:

[0078] S131: When the target cooling capacity is less than or equal to the first cooling capacity of the first cold water tank, the processor determines that the cold water outlet valve and the cold water inlet valve are in the first state, and the target opening is the maximum opening.

[0079] S132, when the target cooling capacity is greater than the first cooling capacity of the first cold water tank and less than or equal to the second cooling capacity of the second cold water tank, the processor determines that the cold water outlet valve and the cold water inlet valve are in the second state; and determines the target opening of the cold water outlet valve and the cold water inlet valve based on the first difference between the target cooling capacity and the first cooling capacity, or the second difference between the second cooling capacity and the target cooling capacity.

[0080] S133: When the target cooling capacity is greater than the cooling capacity of the second cold water tank, the processor determines that the cold water outlet valve and the cold water inlet valve are in the third state, and the target opening is the maximum opening.

[0081] Among them, the first state of the cold water outlet valve and the cold water inlet valve refers to the state in which the first cold water tank is connected to the cold water circulation loop, the second state refers to the state in which both the first cold water tank and the second cold water tank are connected to the cold water circulation loop, and the third state refers to the state in which the second cold water tank is connected to the cold water circulation loop.

[0082] Here, given a fixed compressor power and throttling element opening, supplying the required indoor cooling capacity depends on the cooling capacity of the first and second cold water tanks. If the target cooling capacity exceeds the first cooling capacity of the first cold water tank, the first cold water tank can meet the indoor cooling demand. Therefore, the first cold water tank supplies cold water to the room (at this point, the cold water source temperature is the same as the first cold water tank's), and the cold water outlet valve and cold water inlet valve are set to the first state. This means that the first cold water tank and the cold water pipeline are connected, while the second cold water tank and the cold water pipeline are disconnected. Simultaneously, the valves are kept at their maximum opening to ensure sufficient water flow. The cold water flow rate can be controlled by a water pump to improve cold water flow.

[0083] If the target cooling capacity is greater than the first cooling capacity of the first cold water tank and less than or equal to the second cooling capacity of the second cold water tank, the first cold water tank cannot meet the indoor cooling demand. Therefore, the first and second cold water tanks jointly provide cold water to the room (the cold water source temperature at this time is the temperature of the mixed cold water from the two cold water tanks). The cold water outlet valve and the cold water inlet valve are determined to be in the second state. That is, the first cold water tank and the cold water pipeline are connected, and the second cold water tank and the cold water pipeline are also connected. Furthermore, the valve opening is determined based on the first difference between the target cooling capacity and the first cooling capacity of the first cold water tank, or the second difference between the second cooling capacity and the target cooling capacity. It can be understood that the larger the target cooling capacity, the more cold water is required from the second cold water tank, resulting in a lower temperature of the mixed cold water.

[0084] If the target cooling capacity is greater than the second cooling capacity of the second cold water tank, the combined cold water from the first and second cold water tanks cannot meet demand. Therefore, the second cold water tank provides cold water to the room (the cold water source temperature is now the same as the water temperature in the second cold water tank). The cold water outlet valve and the cold water inlet valve are set to the third state. This means that the first cold water tank and the cold water pipeline are disconnected, while the second cold water tank and the cold water pipeline are connected. Simultaneously, the valves are kept at their maximum opening to ensure sufficient water flow. Simultaneously, the compressor's current power and / or the throttling element opening are adjusted to further lower the water temperature in the second cold water tank. This ensures that the second cooling capacity of the second cold water tank meets the target cooling capacity. Specifically, the compressor's operating frequency can be increased and / or the openings of the first and second throttling elements can be decreased. When the difference between the target cooling capacity and the second cooling capacity is small, the throttling element opening can be decreased. When the difference is large, the compressor frequency can be adjusted. In some cases, both the compressor and throttling element can be adjusted simultaneously.

[0085] Optionally, in step S132, the processor determines target openings of the cold water outlet valve and the cold water inlet valve according to a first difference between the target cooling capacity and the first cooling capacity, or a second difference between the second cooling capacity and the target cooling capacity, including:

[0086] The larger the first difference is or the smaller the second difference is, the smaller the target opening of the cold water outlet valve and the cold water inlet valve between the first end and the third end is, and the larger the target opening of the cold water outlet valve and the cold water inlet valve between the second end and the third end is.

[0087] Here, the larger the first difference, or the smaller the second difference, the closer the target cooling capacity is to the second cooling capacity of the second cold water tank. Therefore, the valve openings of the cold water outlet valve and the cold water inlet valve in the direction of communication with the second cold water tank are larger, while the valve openings in the direction of communication with the first cold water tank are smaller.

[0088] Combine Figure 7 As shown, the embodiment of the present disclosure provides another control method for an air conditioning device, comprising:

[0089] S101: The processor obtains a target operating mode of the air-conditioning device.

[0090] S102: When the target operating mode is not unique, or the target operating mode only includes the cooling mode and the indoor environment is less than a humidity threshold, the processor obtains a target cooling capacity of the air-conditioning device.

[0091] S103: The processor determines the target state and target opening of the first control valve according to the target cooling capacity, and controls the first control valve to execute.

[0092] S204: When the target operation mode includes only the cooling mode and the indoor ambient humidity is greater than or equal to the humidity threshold, the processor determines that the target state of the first control valve is the first state and the target state of the second control valve is the second state.

[0093] S205, the processor controls the first control valve and the second control valve to execute the target state; and controls the three-way valve and the stop valve of the first indoor heat exchanger and the second indoor heat exchanger to connect the first indoor heat exchanger to the first cold water tank, and the second indoor heat exchanger to the second cold water tank.

[0094] The second state of the second control valve refers to a state in which the second control valve enables communication between the second cold water tank and the indoor heat exchanger.

[0095] Here, when the target operating mode is unique and is cooling mode, it is generally the hot summer season. The indoor environment is not only hot, but also often accompanied by high humidity, especially in the south or coastal cities. This leads to users wanting to further reduce the indoor humidity during cooling, that is, to improve the dehumidification effect during cooling. Therefore, in the embodiment of the present disclosure, when the operating mode only includes cooling mode and the indoor humidity is high, the states of the first control valve and the second control valve are adjusted so that the first indoor heat exchanger cools the indoor air and the second indoor heat exchanger condenses moisture from the cooled air. This achieves humidity regulation during cooling.

[0096] Specifically, the first control valve (including the cold water outlet valve and the cold water inlet valve) is connected to the first cold water tank and the cold water pipeline, so that the first cold water tank serves as the water source for the cold water pipeline. At the same time, the second control valve (including the cold and hot water outlet valves and the cold and hot water inlet valves) is connected to the second cold water tank and the hot water pipeline, so that the second cold water tank serves as the water source for the hot water pipeline. At the same time, the shut-off valve and the three-way valve of the first indoor heat exchanger and the second indoor heat exchanger are adjusted to connect the first heat exchanger to the cold water pipeline and the second heat exchanger to the heat pipe (see Figure 5 In this way, the cold water in the first heat exchanger is the cold water in the first cold water tank, and the cold water in the second heat exchanger is the cold water in the second cold water tank. In this way, the air flowing through the indoor heat exchanger is first cooled and then dehumidified.

[0097] Combine Figure 8 As shown, the embodiment of the present disclosure provides another control method for an air conditioning device, comprising:

[0098] S101: The processor obtains a target operating mode of the air-conditioning device.

[0099] S102: When the target operating mode is not unique, or the target operating mode only includes the cooling mode and the indoor environment is less than a humidity threshold, the processor obtains a target cooling capacity of the air-conditioning device.

[0100] S103: The processor determines the target state and target opening of the first control valve according to the target cooling capacity, and controls the first control valve to execute.

[0101] S304: When the target operation mode includes the non-stop defrosting mode, the processor determines that the target state of the first control valve is the first state and the target opening is the maximum opening.

[0102] S305: The processor controls the first control valve to execute the target state and target opening, and controls the defrost pipeline and the refrigerant branch to be conductive.

[0103] Here, when the target operating mode includes a non-stop defrost mode, one of the indoor heat exchangers must be an evaporator. Furthermore, there is generally a demand for indoor heating during defrosting. To prevent the evaporator from significantly affecting the indoor temperature, the first control valve is adjusted to the first state. That is, the indoor evaporator uses a first cold water tank with a relatively high temperature to provide cold water, reducing the significant fluctuations in indoor temperature caused by defrosting. At the same time, to increase the temperature of the outdoor heat exchanger, the defrost line is controlled to be open so that some of the refrigerant from the compressor exhaust port flows into the outdoor heat exchanger. Furthermore, the refrigerant flowing through the hot water tank no longer flows into the outdoor heat exchanger, but instead flows directly into the ejector, meaning that the refrigerant branch is also open. Specifically, by controlling the states of the first and second defrost valves, the defrost line and the refrigerant branch are kept open.

[0104] Combine Figure 9 As shown, an embodiment of the present disclosure provides a control device 200 for an air conditioning device, comprising a processor 100 and a memory 101. Optionally, the device may further comprise a communication interface 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transmission. The processor 100 may invoke logic instructions stored in the memory 101 to execute the control method for an air conditioning device according to the above embodiment.

[0105] In addition, the logic instructions in the memory 101 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0106] The memory 101 is a computer-readable storage medium that can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes the program instructions / modules stored in the memory 101 to execute functional applications and data processing, thereby implementing the control method for the air conditioning device in the above-mentioned embodiments.

[0107] The memory 101 may include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data generated based on the use of the terminal device. Furthermore, the memory 101 may include high-speed random access memory and non-volatile memory.

[0108] Combine Figure 10 As shown, an embodiment of the present disclosure provides an air-conditioning device 300, comprising: an air-conditioning body, and the above-mentioned control device 200 for the air-conditioning device. The control device 200 for the air-conditioning device is installed on the product body. The installation relationship described here is not limited to placement inside the product, but also includes installation connections with other components of the product, including but not limited to physical connections, electrical connections or signal transmission connections, etc. It can be understood by those skilled in the art that the control device 200 for the air-conditioning device can be adapted to a feasible product body, thereby realizing other feasible embodiments.

[0109] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned control method for an air-conditioning device.

[0110] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0111] The technical solutions of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, an optical disk, and other media that can store program code, or a transient storage medium.

[0112] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. Moreover, the terms used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, the singular forms "a", "an" and "the" are intended to also include the plural forms unless the context clearly indicates otherwise. Similarly, the term "and / or" as used in this application means any and all possible combinations of one or more of the associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of other identical elements in the process, method or device that includes the element. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments can be referenced to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can be referred to the description of the method part.

[0113] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0114] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices and equipment) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units may be merely a logical functional division. In actual implementation, other divisions may be used, such as combining or integrating multiple units or components into another system, or omitting or disabling some features. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be through interfaces, indirect couplings or communication connections between devices or units, and may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of these units may be selected to implement the embodiments according to actual needs. Furthermore, the functional units in the disclosed embodiments may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0115] The flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operations of the systems, methods and computer program products according to the embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified function or action, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. An air conditioning device, characterized in that: include: The outdoor heat exchange system includes a main refrigerant circulation loop formed by sequentially connecting a compressor, a hot water tank, a first throttling element, an outdoor heat exchanger, an ejector, a cold water tank, and a liquid storage tank; The cold water tank includes a first cold water tank and a second cold water tank; the first cold water tank is located in the main refrigerant circulation loop; the second cold water tank is located in the secondary refrigerant circulation loop; the secondary refrigerant circulation loop includes a liquid storage tank, a second throttling element, a second cold water tank, and an ejector connected in sequence; The indoor water circulation system includes an indoor heat exchanger, which is connected to a cold water tank through a cold water pipe to form a cold water circulation loop; and is connected to a hot water tank through a hot water pipe to form a hot water circulation loop; The water outlet and water inlet of the first cold water tank and the second cold water tank are connected to the cold water circulation loop through the first control valve, so that the water inlet and outlet of the first cold water tank and the second cold water tank can be adjusted by adjusting the first control valve.

2. The air conditioning device according to claim 1, characterized in that The first control valve comprises: A cold water outlet valve is provided on the cold water pipe on the water inlet side of the cold water circulation loop; a first end of the valve is connected to the water outlet of the first cold water tank, a second end is connected to the water outlet of the second cold water tank, and a third end is connected to the first end of the indoor heat exchanger through the cold water pipe; The cold water inlet valve is arranged on the cold water pipeline on the outlet side of the cold water circulation loop; its first end is connected to the water inlet of the first cold water tank, the second end is connected to the water inlet of the second cold water tank, and the third end is connected to the second end of the indoor heat exchanger through the cold water pipeline.

3. The air conditioning device according to claim 1, wherein The indoor heat exchanger comprises: A first indoor heat exchanger and a second indoor heat exchanger are arranged in parallel; The first end and the second end of the first indoor heat exchanger are respectively provided with a first three-way valve and a first stop valve connected to the cold water pipeline; A second three-way valve and a second stop valve connected to a hot water pipeline are respectively provided at the first end and the second end of the second indoor heat exchanger; One end of the first three-way valve is connected between the second stop valve and the first end of the second indoor heat exchanger, and one end of the second three-way valve is connected between the first stop valve and the second end of the first indoor heat exchanger.

4. The air conditioning device according to claim 3, characterized in that The water inlet and outlet of the second cold water tank are also connected to the hot water pipeline through pipelines respectively, and a second control valve is provided at the pipeline connection; by controlling the second control valve, the second cold water tank or hot water tank and the indoor heat exchanger are controlled to be connected.

5. The air conditioning device according to any one of claims 1 to 4, characterized in that: The outdoor heat exchange system further includes: A defrost pipeline is connected between the compressor exhaust port and the outdoor heat exchanger, and a first defrost valve is provided on the defrost pipeline to control the on-off state of the defrost pipeline; The refrigerant branch is connected between the hot water tank and the ejector, and a second defrost valve is provided on the refrigerant branch to control the on-off state of the refrigerant branch according to the state of the outdoor heat exchanger.

6. A control method for an air conditioning device, characterized in that: Applied to the air conditioning device according to any one of claims 1 to 5, the control method comprises: obtaining a target operating mode of the air conditioning device; When the target operating mode is not unique, or the target operating mode only includes the cooling mode and the indoor environment is less than the humidity threshold, obtaining a target cooling capacity of the air-conditioning device; According to the target cooling capacity, the target state and target opening degree of the first control valve are determined, and the first control valve is controlled to perform.

7. The method according to claim 6, characterized in that The first control valve includes a cold water outlet valve and a cold water inlet valve. According to the target cooling capacity, the target state and target opening of the control valve are determined, including: When the target cooling capacity is less than or equal to the first cooling capacity of the first cold water tank, determining that the cold water outlet valve and the cold water inlet valve are in the first state and the target opening is the maximum opening; When the target cooling capacity is greater than the first cooling capacity of the first cold water tank and less than or equal to the second cooling capacity of the second cold water tank, determining that the cold water outlet valve and the cold water inlet valve are in the second state; and determining the target openings of the cold water outlet valve and the cold water inlet valve according to a first difference between the target cooling capacity and the first cooling capacity, or a second difference between the second cooling capacity and the target cooling capacity; When the target cooling capacity is greater than the cooling capacity of the second cold water tank, determining that the cold water outlet valve and the cold water inlet valve are in the third state, and the target opening is the maximum opening; Among them, the first state of the cold water outlet valve and the cold water inlet valve refers to the state in which the first cold water tank is connected to the cold water circulation loop, the second state refers to the state in which both the first cold water tank and the second cold water tank are connected to the cold water circulation loop, and the third state refers to the state in which the second cold water tank is connected to the cold water circulation loop.

8. The method according to claim 7, characterized in that Determining the target openings of the cold water outlet valve and the cold water inlet valve according to a first difference between the target cooling capacity and the first cooling capacity, or a second difference between the second cooling capacity and the target cooling capacity, includes: The larger the first difference is or the smaller the second difference is, the smaller the target opening of the first end and the third end of the cold water outlet valve and the cold water inlet valve is, and the larger the target opening of the second end and the third end of the cold water outlet valve and the cold water inlet valve is.

9. The method according to claim 6, characterized in that The second cold water tank is further connected to the hot water pipeline through a pipeline, and a second control valve is provided at the pipeline connection. The indoor heat exchanger includes a first indoor heat exchanger and a second indoor heat exchanger arranged in parallel, and the air flow of the air conditioning device first flows through the first indoor heat exchanger; The method further comprises: When the target operation mode includes only the cooling mode and the indoor ambient humidity is greater than or equal to the humidity threshold, determining that the target state of the first control valve is the first state and the target state of the second control valve is the second state; Controlling the first control valve and the second control valve to execute the target state; and controlling the three-way valve and the stop valve of the first indoor heat exchanger and the second indoor heat exchanger to connect the first indoor heat exchanger to the first cold water tank and the second indoor heat exchanger to the second cold water tank; The first state of the first control valve is a state in which the first cold water tank is connected to the cold water circulation circuit, and the second state of the second control valve is a state in which the second cold water tank is connected to the indoor heat exchanger.

10. The method according to any one of claims 6 to 9, characterized in that Also includes: When the target operation mode includes a non-stop defrosting mode, determining that the target state of the first control valve is a first state and the target opening is a maximum opening; The first control valve is controlled to execute the target state and target opening, and the defrost pipeline and the refrigerant branch are controlled to be conductive.

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