Air conditioning device and control method for air conditioning device

Abstract

The invention relates to the technical field of smart home, and discloses an air conditioning device which comprises an outdoor heat exchange system comprising 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 tanks comprise first and second cold water tanks; 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, the second throttling element, the second cold water tank and the ejector; the indoor water circulation system comprises an indoor heat exchanger which is communicated with the cold water tank through a cold water pipeline to form a cold water circulation loop; a hot water circulation loop is formed by communicating a hot water pipeline with the hot water tank; water outlets and water inlets of the first and second cold water tanks are connected to the cold water circulation loop through first control valves, and the first control valves are adjusted to adjust the water inlet and outlet amount of the first and second cold water tanks. The device is favorable for improving the energy efficiency of the air conditioning device. The invention 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 adjust the indoor temperature and humidity, but they cannot meet the user's needs for uninterrupted heating and cooling throughout the year through cold and heat recovery. In order to achieve the above needs, multiple sets of compressors and outdoor heat balancers are generally used to meet the use of multi-mode scenarios, and air replenishment and enthalpy increase are used to supplement the deficiency of low-temperature heating conditions in winter.

[0003] The air conditioning device 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 a cooling mode, the second mode is a heating mode, and the third mode is a dehumidification heat recovery mode. The first water-fluorine heat exchanger is arranged at the air outlet of the compressor and is connected to the indoor heating and dehumidification heat recovery terminal of the domestic hot water tank through a hot water three-way valve.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems 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 the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the 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 components 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 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 pipeline to form a cold water circulation loop; and connected to a hot water tank through a hot water pipeline 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 comprises:

[0015] A cold water outlet valve is arranged on the cold water pipeline at 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 pipeline;

[0016] The cold water inlet valve is arranged on the cold water pipeline at 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 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 operation mode of the air conditioning device;

[0025] When the target operation mode is not unique, or the target operation 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 by the embodiments of the present disclosure can achieve the following technical effects:

[0028] In the disclosed embodiment, two cold water tanks and ejectors are provided to form a primary refrigerant circulation loop and a secondary refrigerant circulation loop. The refrigeration system of the air-conditioning device can achieve step-by-step cooling, so that the cold water temperatures of the two cold water tanks are different. This helps to improve the energy efficiency of the air-conditioning device and can provide multi-temperature cold water for the indoor side.

[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, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

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

[0032] Figure 2 It is a schematic diagram of the water flow direction of the indoor water circulation system when the air-conditioning device provided by the embodiment of the present disclosure is cooling;

[0033] Figure 3 is a schematic diagram of the water flow direction of the indoor water circulation system when the air-conditioning device provided by the embodiment of the present disclosure is heating;

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

[0040] Fig.10 is a 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 valve; 52: cold and hot water inlet valve; 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 contents 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 attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the 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] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "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 indicates: A or B.

[0047] The term "and / or" is a description of the association relationship 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] Combination 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 through a cold water pipeline to form a cold water circulation loop; the indoor heat exchanger 21 is connected to the hot water tank 12 through a hot water pipeline to form a hot water circulation loop. The water outlet and the water inlet of the first cold water tank 161 and the second cold water tank 162 are connected to the cold water circulation loop through a first control valve, so as to adjust the water inlet and outlet of the first cold water tank 161 and the second cold water tank 162 by adjusting the first control valve.

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

[0051] Combination Figure 2As shown, when the air-conditioning device is running in cooling mode, the operation process of the outdoor heat exchange system is as follows: the refrigerant is discharged through the exhaust port of the compressor and flows through the hot water tank (in cooling mode, the hot water circulation loop of the indoor heat exchange system is cut off, so the refrigerant basically does not exchange heat with the hot water tank). Then the refrigerant flows into the outdoor heat exchanger through the first throttling element to dissipate heat (at this time, the outdoor heat exchanger is a condenser), and then after throttling by the ejector, flows through the first cold water tank for heat exchange, and then flows into the liquid storage tank. When the second throttling element is turned on and the throttling effect is exerted, part of the refrigerant in the liquid storage tank flows through the second cold water tank for heat exchange, and then flows into the second inlet of the ejector for throttling and returns to the liquid storage tank (that is, part of the refrigerant flows through the secondary refrigerant circulation loop). Part of the refrigerant in the liquid storage tank flows back to the compressor.

[0052] At the same time, the operation process of the indoor water circulation system is: the hot water circulation loop is cut off, and the cold water circulation loop is turned on. 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 to the water inlet of the cold water tank through the pipeline. Specifically, in case one, cold water can flow from the outlet of the first cold water tank into the indoor heat exchanger and flow back to the first cold water tank. At this time, the first control valve connects the first cold water tank and the two ends of the cold water pipeline to be turned on (the first control valve is in the first state). In case two, cold water can flow from the outlet of the second cold water tank through the cold water pipeline into the indoor heat exchanger and flow back to the second cold water tank. At this time, the first control valve connects the second cold water tank and the two ends of the cold water pipeline to be turned on (the first control valve is in the third state). In case three, cold water can flow from the outlet of the first cold water tank and the second cold water tank through the cold water pipeline into the indoor heat exchanger and flow back to the first cold water tank and the second cold water tank. At this time, the three ends of the first control valve are all turned on (the first control valve is in the second state). The above three situations can be reasonably selected according to the indoor cooling capacity requirements.

[0053] In cooling mode, part of the refrigerant temperature further cools the cold water in the second cold water tank. This makes the water temperature of the first cold water tank and the second cold water tank different. In this way, the heat of the refrigerant is fully utilized to achieve step-by-step adjustment of the cold water temperature, which helps to improve the indoor refrigeration energy efficiency in hot seasons. In addition, due to the negative pressure inside the ejector, the bypass refrigerant is sucked into the ejector. That is, the power of the bypass refrigerant does not need to be provided by the compressor, which further reduces the load of the compressor and improves the energy efficiency of the air-conditioning device.

[0054] Combination Figure 3As shown, when the air-conditioning device is running in heating mode, the operation process of the outdoor heat exchanger system is: the refrigerant is discharged through the exhaust port of the compressor and flows through the hot water tank for heat exchange. Then the cooled refrigerant flows into the outdoor heat exchanger through the first throttling element to absorb heat (at this time, the outdoor heat exchanger is an evaporator), and then after being throttled by the ejector, it flows through the cold water tank and then flows into the liquid storage tank (in heating mode, the cold water circulation loop of the indoor heat exchange system is cut off, so the refrigerant basically does not exchange heat with the cold water tank). The refrigerant in the liquid storage tank flows back to the compressor. At the same time, the operation process of the indoor water circulation system is: the hot water circulation loop is turned on, and the cold water circulation loop is cut off. Hot water flows into the indoor heat exchanger from the outlet of the hot water tank and then flows back to the hot water tank through the pipeline. In heating mode, the secondary refrigerant circulation loop is cut off.

[0055] The air conditioning device provided by the embodiment of the present disclosure forms a primary refrigerant circulation loop and a secondary refrigerant circulation loop by setting two cold water tanks and ejectors. The refrigeration system of the air conditioning device can achieve step-by-step cooling, so that the cold water temperatures of the two cold water tanks are different. This helps to improve the energy efficiency of the air conditioning device and can provide multi-temperature cold water for the indoor side.

[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 arranged 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 through the cold water pipeline. The cold water inlet valve 42 is arranged 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 through the cold water pipeline.

[0057] Here, the first control valve is arranged on the cold water pipeline, the cold water outlet valve is arranged on the water inlet side, and the cold water inlet valve is arranged on the water outlet side. The cold water outlet valve and the cold water inlet valve are used together to control the cold water supply and return. In addition, the first control valve is not only used to control the cold water circulation loop, but also to adjust its opening, especially when the first cold water tank and the second cold water tank jointly provide cold water, to 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 161 and a second indoor heat exchanger 162, which 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 31 and a first stop valve 32 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 33 and a second stop valve 34 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 an evaporator and a 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 states of the two indoor heat exchangers are consistent, and the heat exchange area is larger than that of a single heat exchanger. Thereby meeting the needs of low-temperature heating or high-temperature cooling. In the disclosed embodiment of the present disclosure, the air flow direction of the air conditioner 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] Combination 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 the cold water pipeline and the hot water pipeline at the same time. It can be understood that when the second cold water tank is connected to the cold water pipeline, the cold water of the second cold water tank can be connected to the indoor heat exchanger alone, or mixed with the cold water of the first cold water tank and connected to the indoor heat exchanger. But when it is connected alone, the water of the first cold water tank cannot be connected to the indoor heat exchanger alone. Therefore, the second cold water tank is connected to the hot water pipeline. In this way, when there is only a cooling demand indoors (no hot water is circulated in the hot water pipeline), the first indoor heat exchanger can be controlled to be connected to the first cold water tank, and the second indoor heat exchanger can be connected to the second cold water tank. In this way, after the indoor airflow is cooled by the first indoor heat exchanger, it is heat exchanged with the second indoor heat exchanger with a lower temperature, which helps to analyze the water in the airflow (that is, the water vapor temperature easily reaches the dew point temperature, and then condenses into water). Thereby reducing the humidity of the indoor environment during cooling and improving the user's comfort.

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

[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] In this way, when there is no heating demand indoors, the conduction direction of the cold and hot water outlet valve and the cold and hot water inlet valve is adjusted so that the cold water in the second cold water tank flows to the indoor heat exchanger through the hot water pipeline. In this way, the cold water of different water temperatures can be controlled to enter the first heat exchanger and the second heat exchanger respectively. Thus, the air conditioning device forms a dual-temperature cold water circulation loop to achieve the joint regulation of indoor temperature and humidity.

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

[0067] Combination Figure 5 Optionally, the outdoor heat exchange system further includes a defrost pipeline 61 and a refrigerant branch 62. The defrost pipeline is connected between the compressor exhaust port and the outdoor heat exchanger, and a first defrost valve 71 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 72 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.

[0068] Here, in order to improve the defrosting efficiency, a defrosting pipeline and a refrigerant branch are set. A part of the refrigerant at the compressor exhaust port flows directly into the outdoor heat exchanger through the defrosting pipeline, while the refrigerant flowing out of the hot water tank flows into the ejector after merging with the refrigerant flowing through the outdoor heat exchanger through the refrigerant branch. In this way, the refrigerant flowing through the outdoor heat exchanger has a high temperature, which is helpful for 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 operation mode of the air-conditioning device.

[0071] S102: When the target operation mode is not unique, or the target operation 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 disclosed embodiment, the target operation 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 heating mode, the reheat dehumidification mode or non-stop defrosting mode may also be run simultaneously. For example, in summer cooling mode, when the user needs hot water when bathing, the target mode also includes heating mode. Here, the target operation mode of the air-conditioning device can be obtained through the user's demand for smart home appliances. For example, the target temperature and operation instructions of smart home appliances are obtained; wherein smart home appliances include terminal devices such as air conditioners, water heaters, and floor heating equipment that are connected to cold water and hot water.

[0074] The uniqueness of the target operation mode means that the status of each group of indoor heat exchangers is consistent. When there are multiple groups of indoor heat exchangers, the status of multiple groups of indoor heat exchangers is consistent. That is, multiple indoor heat exchangers are all evaporators or all indoor heat exchangers are condensers. Alternatively, the uniqueness of the target operation mode means that when the air-conditioning device is connected to other terminal devices, the cooling and heating requirements of the terminal devices and the indoor heat exchangers are consistent. If the target operation mode is not unique, it means that there are both evaporators and condensers in the indoor heat exchanger. At this time, the cold water circulation loop in the indoor water circulation system is turned on. When the target operation mode only includes the cooling mode and the indoor ambient humidity is less than the humidity threshold, the cold water circulation loop in the indoor water circulation system also needs to be turned on.

[0075] In both of the above situations, there is a cooling demand in the indoor environment, which involves the control of the cold water circulation loop, and more specifically involves the control of the first control valve. Therefore, when the target operation mode meets the above situation, the embodiment of the present disclosure obtains the target cooling capacity of the air-conditioning device. 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. Especially when the first cold water tank and the second cold water tank both provide cold water, the opening of the valve determines the water temperature of the mixed cold water.

[0076] The control method for an air conditioner provided by the embodiment of the present disclosure is used to control the state of the first control valve based on the target cooling capacity to match the corresponding first cold water tank and / or second cold water tank to provide a cold water source. The valve opening is controlled to obtain a cold water temperature that meets the requirements. In this way, a step-by-step cooling method is used to improve the energy consumption of the air conditioner.

[0077] Optionally, in step S103, the processor determines a target state and a target opening degree 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 according to 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, when the compressor power and the opening of the throttling element are constant, the supply of indoor cooling demand depends on the cooling capacity of the first cold water tank and the second cold water tank. If the target cooling capacity is greater than the first cooling capacity of the first cold water tank, it means that the first cold water tank can meet the indoor cooling demand. Therefore, the first cold water tank provides cold water to the room (at this time, the water temperature of the cold water source is the water temperature of the first cold water tank), and the cold water outlet valve and the cold water inlet valve are determined to be in the first 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 not connected. At the same time, the opening of the above valve is kept at the maximum opening to ensure sufficient water. The cold water flow rate can be controlled by a water pump to improve the cold water circulation.

[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, it indicates that the first cold water tank cannot meet the indoor cooling demand. Therefore, the first cold water tank and the second cold water tank jointly provide cold water for the room (at this time, the water temperature of the cold water source is the water temperature after the cold water of the two cold water tanks is mixed). Determine that the cold water outlet valve and the cold water inlet valve are 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. Further, 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, determine the opening of the valve. It can be understood that the larger the target cooling capacity, the more cold water required by the second cold water tank, so that the temperature of the mixed cold water is lower.

[0084] If the target cooling capacity is greater than the second cooling capacity of the second cold water tank, it indicates that the cold water mixed with the first cold water tank and the second cold water tank cannot meet the demand. Therefore, the second cold water tank provides cold water for the room (at this time, the water temperature of the cold water source is the water temperature of the second cold water tank). Determine that the cold water outlet valve and the cold water inlet valve are in the third state. That is, the first cold water tank and the cold water pipeline are not connected, and the second cold water tank and the cold water pipeline are connected. At the same time, keep the opening of the above valve at the maximum opening to ensure sufficient water. At the same time, adjust the current power of the compressor and / or the opening of the throttling element to further reduce the water temperature of the second cold water tank. Thereby, the second cooling capacity of the second cold water tank can meet the target cooling capacity. Specifically, the operating frequency of the compressor can be increased, and / or the opening of the first throttling element and the second throttling element can be reduced. Among them, when the difference between the target cooling capacity and the second cooling capacity is small, the opening of the throttling element can be reduced. When the difference between the two is large, the frequency of the compressor can be adjusted. Even, the compressor and the throttling element can be adjusted at the same time.

[0085] Optionally, in step S132, the processor determines 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, including:

[0086] The larger the first difference is or the smaller the second difference is, the smaller the target opening between 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 between the second end and the third end is.

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

[0088] Combination 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 operation mode of the air-conditioning device.

[0090] S102: When the target operation mode is not unique, or the target operation 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 cutoff valve of the first indoor heat exchanger and the second indoor heat exchanger to connect the first indoor heat exchanger with the first cold water tank, and connect the second indoor heat exchanger with 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 the second cold water tank and the indoor heat exchanger to communicate with each other.

[0095] Here, when the target operation mode is unique and is the cooling mode, it is generally the hot summer season. The indoor environment is not only high in temperature, but also often accompanied by high humidity, especially in the south or coastal cities. This leads to the user's expectation to further reduce the indoor environmental humidity during cooling, that is, the dehumidification effect needs to be improved during cooling. Therefore, in the embodiment of the present disclosure, when the operation mode only includes the cooling mode and the indoor environmental 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. Thereby, humidity regulation is achieved during cooling.

[0096] Specifically, determine that 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 two ends of the cold water pipeline, so that the first cold water tank serves as the water supply source for the cold water pipeline. At the same time, determine that 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 two ends of the hot water pipeline, so that the second cold water tank serves as the water supply source for the hot water pipeline. At the same time, adjust the stop valve and the three-way valve of the first indoor heat exchanger and the second indoor heat exchanger. So that the first heat exchanger is connected to the cold water pipeline, and the second heat exchanger is connected to the heat pipe pipeline (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 airflow flowing through the indoor heat exchanger is first cooled and then dehumidified.

[0097] Combination 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 operation mode of the air-conditioning device.

[0099] S102: When the target operation mode is not unique, or the target operation 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 a non-stop defrosting mode, the processor determines that the target state of the first control valve is a first state and the target opening is a 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 operation mode includes a non-stop defrosting mode, one of the indoor heat exchangers must be an evaporator. And there is generally a heating demand indoors during defrosting. In order to avoid the evaporator from having a greater impact on the indoor temperature, the state of 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 large fluctuations in indoor temperature caused by defrosting. At the same time, in order to increase the temperature of the outdoor heat exchanger, the defrost pipeline is controlled to be connected so that part of the refrigerant at the compressor exhaust port flows into the outdoor heat exchanger. And the refrigerant flowing through the hot water tank no longer flows into the outdoor heat exchanger, but directly flows into the ejector, that is, the refrigerant branch is also connected. Specifically, by controlling the states of the first defrost valve and the second defrost valve, the defrost pipeline and the refrigerant branch are in a conducting state.

[0104] Combination Fig. 9 As shown, the embodiment of the present disclosure provides a control device 200 for an air conditioning device, including a processor 100 and a memory 101. Optionally, the device may also include a communication interface 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other through the bus 103. The communication interface 102 may be used for information transmission. The processor 100 may call the logic instructions in the memory 101 to execute the control method for the air conditioning device of the above embodiment.

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

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

[0107] The memory 101 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 101 may include a high-speed random access memory and may also include a non-volatile memory.

[0108] Combination Fig.10 As shown, an embodiment of the present disclosure provides an air-conditioning device 300, including: 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 in 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. 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 computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

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

[0112] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words 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 the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "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, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer 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 refer 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 for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may 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, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0115] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order 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, and 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 functions or actions, 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 pipeline to form a cold water circulation loop; and connected to a hot water tank through a hot water pipeline 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 arranged on the cold water pipeline at 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 pipeline; The cold water inlet valve is arranged on the cold water pipeline at 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, characterized in that: The indoor heat exchanger comprises: A first indoor heat exchanger and a second indoor heat exchanger are arranged in parallel; Wherein, 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 also 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 operation mode of the air conditioning device; When the target operation mode is not unique, or the target operation 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 the target opening degree of the first control valve are determined, and the first control valve is controlled to execute.

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, comprises: 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 also 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 which are arranged in parallel, and the air flow of the air conditioner 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 environment 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; Control the first control valve and the second control valve to execute the target state; and control the three-way valve and the cutoff valve of the first indoor heat exchanger and the second indoor heat exchanger to make the first indoor heat exchanger communicate with the first cold water tank, and the second indoor heat exchanger communicate with the second cold water tank; The first state of the first control valve refers to 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 refers to 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 the target opening, and the defrost pipeline and the refrigerant branch are controlled to be conductive.

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