Air conditioning device, control method and device for air conditioning device and storage medium

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 refrigerant circulation loop formed by sequentially connecting a compressor, a hot water tank, a first throttling element, an outdoor heat exchanger, a cold water tank and a liquid storage tank; the indoor water circulation system comprises an indoor heat exchanger, the first end of the indoor heat exchanger is connected with a water outlet of the cold water tank through a cold water pipeline, a hot water pipeline is connected with a water outlet of the hot water tank, and the second end is connected with water inlets of the cold water tank and the hot water tank through water return pipelines. The water return pipeline is provided with a water return three-way valve, and the direction of the water return three-way valve is adjusted to control water in the water return pipeline to flow back to the cold water tank and / or the hot water tank. The structure of the air conditioning device is simplified. 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, a control method and device for the air-conditioning device, and a storage medium. 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 indoor heat exchanger pipeline structure is complicated, which makes the structure of the air conditioning device complicated.

[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, a control method for the air conditioning device, and a control device to simplify the structure of the air conditioning device.

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

[0010] The outdoor heat exchange system includes a compressor, a hot water tank, a first throttling element, an outdoor heat exchanger, a cold water tank, and a liquid storage tank connected in sequence to form a refrigerant circulation loop;

[0011] The indoor water circulation system comprises an indoor heat exchanger, a first end of which is connected to the water outlet of the cold water tank and a hot water tank through a cold water pipeline, and a second end of which is connected to the water inlet of the cold water tank and the hot water tank through a return water pipeline;

[0012] A return water three-way valve is arranged on the return water pipeline, and the valve direction of the return water three-way valve is adjusted to control the water in the return water pipeline to flow back to the cold water tank and / or the hot water tank.

[0013] In some embodiments, the method comprises:

[0014] Determine the target operation mode of the air conditioning device and the cooling and heating demand corresponding to the target operation mode; control the status of the cold and hot water circulation loops and the conduction direction of the return water three-way valve according to the target operation mode; and control the opening of the return water three-way valve according to the cooling and heating demand.

[0015] The method further comprises:

[0016] The opening degrees of the first throttle element and the second throttle element are controlled according to the target operation mode.

[0017] In some embodiments, the device includes: a processor and a memory storing program instructions, and the processor is configured to execute the aforementioned control method for the air-conditioning device when running the program instructions.

[0018] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the aforementioned control method for the air-conditioning device is executed.

[0019] The air conditioning device, control method and control device for the air conditioning device provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] The indoor water circulation system is connected to the cold water tank and hot water tank of the outdoor heat exchange system through the cold water pipe and hot water pipe respectively, and the cold and hot water return pipes of the indoor circulation system are shared. In this way, the structure of the indoor water circulation system is more concise. In addition, the indoor heat exchanger can match the corresponding cold water or hot water based on user needs, thus meeting the diverse needs of users.

[0021] 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

[0022] 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:

[0023] Figure 1is a structural schematic diagram of an air conditioning device provided by an embodiment of the present disclosure;

[0024] 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;

[0025] 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;

[0026] Figure 4 is a schematic diagram of a control method for an air conditioning device according to an embodiment of the present disclosure;

[0027] Figure 5 is a schematic diagram of another control method for an air conditioning device according to an embodiment of the present disclosure;

[0028] Figure 6 is a schematic diagram of another control method for an air conditioning device according to an embodiment of the present disclosure;

[0029] Figure 7 is a schematic diagram of another control device for an air conditioning device provided by an embodiment of the present disclosure;

[0030] Figure 8 is a schematic diagram of another air conditioning device provided by an embodiment of the present disclosure.

[0031] Reference numerals:

[0032] 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; 21: indoor heat exchanger; 211: first indoor heat exchanger; 212: second indoor heat exchanger; 31: first three-way valve; 32: first stop valve; 40: return water three-way valve; 100: processor; 101 memory; 102: communication interface; 103: bus. DETAILED DESCRIPTION

[0033] 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.

[0034] 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 that 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.

[0035] Unless otherwise stated, the term "plurality" means two or more.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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, a cold water tank 16, and a liquid storage tank 17. The exhaust port of the compressor is connected to the first inlet of the hot water tank, the first outlet of the hot water tank 12 is connected to the first inlet of the cold water tank 16 through the first throttling element 18 and the indoor heat exchanger, and the first outlet of the cold water tank is connected 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, so as to form a refrigerant circulation loop.

[0040] The indoor water circulation system includes an indoor heat exchanger 21, the first end of which is connected to the water outlet of the cold water tank 16 and the hot water tank 12 through a cold water pipeline, and the second end is connected to the water inlet of the cold water tank and the hot water tank through a return water pipeline. A return water three-way valve 40 is provided on the return water pipeline, and the valve direction of the return water three-way valve is adjusted to control the water in the return water pipeline to flow back to the cold water tank and / or the hot water tank.

[0041] Combination Figure 2As shown, when the air-conditioning device is running in cooling mode, the operation process of the outdoor heat exchange system is: 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 for heat dissipation (at this time, the outdoor heat exchanger is a condenser), flows through the cold water tank for heat exchange, and then flows back to the compressor through the liquid storage tank. At the same time, the operation process of the indoor heat exchanger is: the hot water pipeline is cut off, the cold water pipeline is turned on, and the direction of the return water three-way valve connected to the cold water tank is turned on. Cold water flows into the indoor heat exchanger from the outlet of the cold water tank, and then flows back to the water inlet of the cold water tank through the return water three-way valve, forming a cold water circulation loop.

[0042] Combination Figure 3 As shown in the figure, when the air conditioner is running in heating mode, the operation process of the outdoor heat exchanger system is: the refrigerant is discharged through the compressor exhaust port 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 throttling 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 heat exchanger is: the hot water circulation loop is turned on, the cold water circulation loop is cut off, and the direction of the return water three-way valve connecting the hot water tank is turned on. After the hot water flows into the indoor heat exchanger from the outlet of the hot water tank, it flows back to the hot water tank through the return water three-way valve to form a hot water circulation loop. In this way, the indoor heat exchanger can achieve both cooling and heating.

[0043] With the air conditioning device provided by the embodiment of the present disclosure, the indoor water circulation system is connected to the cold water tank and the hot water tank of the outdoor heat exchange system through the cold water pipeline and the hot water pipeline respectively, and the cold and hot water return pipelines of the indoor circulation system are shared. In this way, the structure of the indoor water circulation system is more concise. In addition, the indoor heat exchanger can match the corresponding cold water or hot water based on the user's needs. Thus, the diversified needs of users are met.

[0044] Optionally, the indoor heat exchanger 21 includes one or more groups. When the indoor heat exchanger includes multiple groups, each group of heat exchangers is arranged in a different space indoors.

[0045] Optionally, each group of indoor heat exchangers includes: a first indoor heat exchanger 211 and a second indoor heat exchanger 212, which are arranged in parallel.

[0046] The first end of the first indoor heat exchanger is connected to the cold water pipeline through the first stop valve 32; the first end of the second indoor heat exchanger is connected to the hot water pipeline through the first three-way valve 31. The second ends of the first indoor heat exchanger and the second indoor heat exchanger are both connected to the return water pipeline. The third end of the first three-way valve is connected between the first stop valve and the first end of the first indoor heat exchanger.

[0047] Here, each set of indoor heat exchangers includes two indoor heat exchangers. Through the design of three-way valves and stop valves, the indoor heat exchangers can be connected to the cold water pipeline or the hot water pipeline. Then, the two indoor heat exchangers are both evaporators or condensers. In this way, the status of the two indoor heat exchangers is consistent, and the heat exchange area is larger than that of a single heat exchanger. Thus, it can meet the needs of low-temperature heating or high-temperature cooling.

[0048] In addition, the three-way valve and the stop valve can also control the two indoor heat exchangers, the evaporator and the condenser. In this way, the indoor air can be dehumidified before heating 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 can be achieved without stopping the machine.

[0049] It should be noted that each group of indoor heat exchangers may include only one heat exchanger, in which case the indoor heat exchanger has two inlets, one of which is connected to the cold water pipeline and the other is connected to the hot water pipeline. This embodiment of the disclosure does not elaborate on this situation.

[0050] Optionally, the air conditioning device further comprises an ejector 15. The ejector 15 comprises a first inlet, a second inlet and an outlet, wherein the first inlet is connected to the outdoor heat exchanger, and the outlet is connected to the first inlet of the cold water tank. The second inlet is connected to the liquid storage tank through the cold water tank and the second throttling element to form a cold water tank temperature regulation bypass.

[0051] Here, a cold water tank temperature adjustment bypass is formed by using a liquid storage tank and an ejector. In cooling mode, the refrigerant in the refrigerant circulation loop flows through the outdoor heat exchanger, is throttled by the ejector, flows through the 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 cold water tank for heat exchange again, and then flows into the second inlet of the ejector for throttling and returns to the liquid storage tank (i.e. part of the refrigerant flows through the cold water tank temperature adjustment bypass).

[0052] That is, in the cooling mode, the temperature regulating bypass of the cold water tank is turned on, and the temperature of this part of the refrigerant is further reduced to cool the cold water of the cold water tank for a second time. Here, the cold water tank divides the inner cavity into two cavities by a partition, and the two cavities are connected by a hole. Alternatively, the cold water tank includes two independent boxes, and the two boxes are connected by a pipeline. The cold water tank temperature regulating bypass and the refrigerant circulation loop flow through different cavities respectively, so that the water temperature of the two cavities is different. In this way, the heat of the refrigerant is fully utilized to achieve the step-by-step adjustment of the cold water temperature, which helps to increase the indoor cooling capacity in hot seasons. In addition, due to the negative pressure inside the ejector, the refrigerant of the bypass 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, thereby improving the energy efficiency of the air-conditioning device. In this way, while the refrigerant cooling capacity is used to adjust the temperature of the cold water tank, the adjustment of different evaporation temperatures of the refrigerant is also achieved. Thereby making the entire system more energy-saving and efficient.

[0053] The cold water tank 16 includes: a first cold water tank 161 and a second cold water tank 162. The first cold water tank and the second cold water tank are connected through a pipeline, the second cold water tank is provided with a water outlet, and the first cold water tank is provided with a water inlet.

[0054] The first cold water tank comprises a first inlet and a first outlet, wherein the first inlet is connected to the outlet of the ejector, and the first outlet is connected to the inlet of the liquid storage tank.

[0055] The second cold water tank includes a second inlet and a second outlet, wherein the second inlet is connected to the second outlet of the liquid storage tank, the second outlet is connected to the second inlet of the ejector, and the second throttling element is arranged in the pipeline between the second outlet of the liquid storage tank and the second inlet of the second cold water tank.

[0056] Here, in order to better realize the step-by-step regulation of the cold water temperature, two cold water tanks are set. Among them, the first cold water tank is set on the refrigerant circulation loop, and the second cold water tank is set on the cold water tank temperature regulation bypass. In this way, after the refrigerant flowing through the first cold water tank flows back to the liquid storage tank, the liquid refrigerant in the liquid storage tank is throttled by the second throttling device and then exchanges heat with the second cold water tank. The water in the second cold water tank absorbs the coldness of the refrigerant to reduce the water temperature. The refrigerant flowing out of the second cold water tank is mixed with the refrigerant at the first inlet of the ejector, flows back to the liquid storage tank and then flows into the compressor. In this way, the water temperature of the second cold water tank is lower than that of the first cold water tank, which helps to meet the different cooling needs of users.

[0057] In addition, the first cold water tank and the second cold water tank are connected by pipelines, forming a closed loop with the cold water pipeline and the indoor heat exchanger to realize cold water circulation. The second cold water tank is provided with a water outlet, and the first cold water tank is provided with a water inlet, that is, the cold water with a lower temperature flows through the water outlet to the indoor heat exchanger for cooling, and then flows back to the first cold water tank through the water inlet. In this way, the low-temperature water exchanges heat with the indoor environment, which helps to improve the cooling effect.

[0058] Optionally, the flow direction of the refrigerant in the cold water tank 16 and the hot water tank 12 is opposite to the flow direction of the water.

[0059] Here, both the cold water tank 16 and the hot water tank 12 use a reverse circulation method for heat exchange, so that the heat exchange effect is better. Among them, the cold water tank includes the first cold water tank and the second cold water tank mentioned above. It can be understood that if the flow direction of the refrigerant in the water tank is the same as the flow direction of the water, then the heat exchange efficiency is high in the early stage of heat exchange. With the flow of refrigerant and water, the temperature difference between the two gradually decreases in the later stage, resulting in a decrease in heat exchange efficiency, or even basically zero heat exchange. Therefore, the reverse circulation method is more helpful to improve the heat exchange effect.

[0060] Optionally, a water pump is provided on the water return pipeline. In this way, the cold water circulation system and the hot water circulation system can share a water pump to achieve water circulation, which is conducive to saving resources.

[0061] Optionally, the indoor water circulation system also includes other terminal devices connected to the cold and hot water tanks, such as water heaters and floor heating.

[0062] Based on the aforementioned air conditioning device, combined with Figure 4 As shown, the embodiment of the present disclosure provides a control method for an air conditioning device, comprising:

[0063] S101, the processor determines a target operating mode of the air-conditioning device and a cooling and heating demand corresponding to the target operating mode.

[0064] S102, the processor controls the status of the cold and hot water pipelines and the conduction direction of the return water three-way valve according to the target operation mode.

[0065] S103, the processor controls the opening of the return water three-way valve according to the cooling and heating demand.

[0066] 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 a heating mode. Here, the target operation mode of the air-conditioning device and the cold and heat demand corresponding to the target operation mode can be determined according to the user's demand for smart home appliances. For example, the target temperature, current temperature, operation mode, etc. of smart home appliances are obtained; wherein, smart home appliances include air conditioners, water heaters, floor heating equipment and other terminal devices connected to cold water and hot water. The cold and heat demand, that is, the cold and heat load, can be calculated through the current temperature and target temperature.

[0067] Furthermore, based on the target operation mode, the state of the cold and hot water circulation loops is controlled. When the target operation mode is unique, such as the heating mode or the cooling mode, it is only necessary to control the hot water circulation loop or the cold water circulation to be turned on. When the state of the indoor heat exchanger is different under the diversified operation modes, it is necessary to control the cold and hot water circulation loops to be turned on. Specifically, as mentioned above, the on or off state of the cold and hot water circulation loops depends on the state of the return water three-way valve, the first stop valve, and the first three-way valve. Under different operation modes, the state of each control valve is different. Therefore, the state of the cold and hot water pipes and the conduction direction of the return water three-way valve are controlled through the target operation mode.

[0068] At the same time, the opening of the corresponding three-way return valve is different for different cold and hot demands. Specifically, the cold and hot demands determine the different return water volumes of the cold water tank and the hot water tank, which in turn makes the valve degrees of the three-way return valve different in different conduction directions. For example, when the cold demand is greater than the hot demand, the valve opening of the three-way return valve in the conduction direction with the cold water tank is greater than the valve opening in the conduction direction with the hot water tank. When the cold and hot demands are the same, the valve opening of the three-way return valve in both directions is the same.

[0069] In addition, it should be noted that when the cold / hot demand is unique, that is, when there is only a hot demand or a cold demand, the opening of the conduction direction corresponding to the return water three-way valve can correspond to the hot / cold demand. For example, the valve opening corresponding to the hot / cold demand can be obtained by looking up a table. In other words, the heat exchange efficiency can be adjusted by adjusting the return water speed. In some embodiments, the flow rate of hot / cold water can also be adjusted by adjusting the speed of the water pump. At this time, the opening of the return water three-way valve can be the maximum opening.

[0070] By using the control method for an air conditioner provided in the embodiment of the present disclosure, the indoor heat exchanger can match the corresponding cold water and / or hot water pipeline conduction based on the user's needs (i.e., the target operation mode). And based on the cold and hot demand, the opening of the conduction direction valve of the return water three-way valve is controlled. In this way, the return water volume of the cold water tank and / or hot water tank is controlled to meet the indoor cooling and / or heating needs.

[0071] Based on the aforementioned air conditioning device, combined with Figure 5 As shown, the embodiment of the present disclosure provides another control method for an air conditioning device, comprising:

[0072] S101, the processor determines a target operating mode of the air-conditioning device and a cooling and heating demand corresponding to the target operating mode.

[0073] S121, when the target operation mode is unique, the processor controls the cold water pipeline or the hot water pipeline corresponding to the target operation mode to be turned on, and controls the valve conduction of the return water three-way valve corresponding to the target operation mode to be turned on.

[0074] S122, when the operation mode is not unique, the processor controls the cold water pipeline and the hot water pipeline to be connected, and the first valve direction and the second valve direction of the return water three-way valve are both connected.

[0075] The heating mode corresponds to the first valve direction of the return water three-way valve, and the cooling mode corresponds to the second valve direction of the three-way valve.

[0076] S103, the processor controls the opening of the return water three-way valve according to the cooling and heating demand.

[0077] Here, the unique 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 unique 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.

[0078] The target operation mode uniquely indicates that the indoor heat exchanger is an evaporator or a condenser, that is, the target operation mode is a cooling mode or a heating mode. The heating mode corresponds to the hot water pipeline being connected, and the first valve of the return water three-way valve is connected (that is, the return water three-way valve connects the second end of the indoor heat exchanger and the two ends of the water inlet of the hot water tank). The cooling mode corresponds to the cold water pipeline being connected, and the second valve of the return water three-way valve is connected (that is, the return water three-way valve connects the second end of the indoor heat exchanger and the two ends of the water inlet of the cold water tank).

[0079] The fact that the operation mode is not unique indicates that the indoor heat exchanger has multiple modes. Alternatively, the fact that the operation mode is reheat dehumidification indicates that the indoor heat exchanger also has multiple modes. In this case, some indoor heat exchangers are evaporators, and some indoor heat exchangers are condensers. At this time, both the cold water pipeline and the hot water pipeline need to be connected, and both the first valve direction and the second valve direction of the return water three-way valve need to be connected. That is, the water in the return water pipeline flows back to the cold water tank and the hot water tank, realizing the double-circuit circulation of cold and hot water.

[0080] Optionally, in steps S121 and S122, the processor controls the cold water pipeline and / or the hot water pipeline to be connected, including:

[0081] When the target operating modes of the first heat exchanger and the second heat exchanger are the same, if the operating mode is the cooling mode, the processor controls the first stop valve to be turned on, and the first three-way valve is in the first state; if the operating mode is the heating mode, the processor controls the first stop valve to be turned off, and the first three-way valve is in the second state.

[0082] When the operation modes of the first heat exchanger and the second heat exchanger are different, the processor controls the first stop valve to be turned on, and the first three-way valve is in the third state.

[0083] Among them, the first state refers to the state in which the two ends of the first three-way valve connecting the first heat exchanger and the second heat exchanger are conductive; the second state refers to the state in which all three ends of the first three-way valve are conductive; the third state refers to the state in which the two ends of the first three-way valve connecting the second heat exchanger and the hot water pipeline are conductive.

[0084] Here, each group of indoor heat exchangers includes two heat exchangers, a first heat exchanger and a second heat exchanger. And the air-conditioning airflow first flows through the first heat exchanger and then flows through the second heat exchanger. In this way, the operation modes of the first heat exchanger and the second heat exchanger of each group of indoor heat exchangers can be different, so that the air-conditioning device can realize the non-stop defrosting mode or the reheating dehumidification mode. Among them, the operation modes of the first heat exchanger and the second heat exchanger are different from the operation modes of the air-conditioning device. For example, if the air-conditioning device operates in the reheating dehumidification mode, the first heat exchanger operates in the dehumidification mode, and the second heat exchanger operates in the heating mode.

[0085] Specifically, when the operation modes of the first heat exchanger and the second heat exchanger are the same, if the target operation mode is the cooling mode, the first heat exchanger and the second heat exchanger are both evaporators. At this time, it is necessary to control the first stop valve to be turned on, and the first three-way valve connecting the two ends of the first heat exchanger and the second heat exchanger is turned on (that is, the first three-way valve is in the first state). In this way, the first heat exchanger and the second heat exchanger are both connected to the cold water tank. If the target operation mode is the heating mode, the first heat exchanger and the second heat exchanger are both condensers. At this time, the first stop valve is controlled to be turned off, and the three ends of the first three-way valve are all turned on. Then the first heat exchanger and the second heat exchanger are both connected to the hot water tank.

[0086] When the operation modes of the first heat exchanger and the second heat exchanger are different, it indicates that the first heat exchanger operates in the dehumidification mode or the defrost mode (at this time, the air conditioning airflow first flows through the first heat exchanger, and the first heat exchanger is an evaporator), and the second heat exchanger operates in the heating mode. In this case, the first stop valve is controlled to be turned on (that is, the first heat exchanger and the hot water pipeline are turned on), and the first three-way valve connecting the second heat exchanger and the two ends of the hot water pipeline are controlled to be turned on (that is, the first three-way valve is in the third state). In this way, the operation modes of the first heat exchanger and the second heat exchanger are different, so as to achieve defrosting or dehumidification during the indoor heating process. That is, the air conditioning device operates in the non-stop defrosting + heating mode, or operates in the reheat dehumidification mode.

[0087] Optionally, in step S103, the processor controls the opening of the return water three-way valve according to the cooling and heating demand, including:

[0088] When there is only heating demand or cooling demand indoors, the processor controls the corresponding valve direction of the return water three-way valve to maintain the maximum opening.

[0089] When there is a heating demand and a cooling demand indoors, the processor controls the ratio of the second valve opening degree and the first valve opening degree of the return water three-way valve according to the ratio of the cooling demand to the heating demand.

[0090] Here, when the operation mode of the air conditioner only includes the heating mode or the cooling mode, there is only a heating demand or a cooling demand in the room. That is, only the hot water pipeline or the cold water pipeline needs to be connected, and the return pipeline is connected to the hot water tank or the cold water tank. At this time, the valve opening of the return water three-way valve corresponding to the operation mode is the largest, so as to ensure that the water volume of the hot water tank or the cold water tank is sufficient. When the water volume is sufficient, the heating demand or the cooling demand is mainly achieved by the compressor and the throttling element. When the air conditioner operates in multiple modes or operates in the reheat dehumidification mode, the indoor heating demand and cooling demand coexist. At this time, the opening of the first valve direction and the second valve direction of the return water three-way valve affects the water volume of the hot water tank and the cold water tank. When the water volume is insufficient, there is a problem that the user's needs cannot be met. Therefore, in order to avoid the situation where the water volume of the water tank is insufficient due to improper return water distribution, the ratio of the opening of the second valve direction to the opening of the first valve direction is controlled to be the ratio of the cold demand volume to the heat demand volume. In this way, the return air three-way valve distributes the return water volume on demand to ensure the indoor cold and hot demand.

[0091] Combination Figure 6 As shown, the embodiment of the present disclosure provides another control method for an air conditioning device, comprising:

[0092] S101, the processor determines a target operating mode of the air-conditioning device and a cooling and heating demand corresponding to the target operating mode.

[0093] S102, the processor controls the status of the cold and hot water pipelines and the conduction direction of the return water three-way valve according to the target operation mode.

[0094] S103, the processor controls the opening of the return water three-way valve according to the cooling and heating demand.

[0095] S204: The processor controls the opening of the first throttling element and the second throttling element according to the cooling and heating demand.

[0096] Here, the outdoor heat exchanger can be used as a heat balancer, and the outdoor heat exchanger can be adjusted to be used as a condenser or an evaporator by adjusting the state of the first throttling element. In addition, as mentioned above, whether the cold water circulation loop is open also determines the state of the cold water tank temperature regulation bypass, that is, the state of the second throttling element. Therefore, based on the demand for cold and hot water, the opening of the first and second throttling elements is controlled.

[0097] Specifically, when there is only a cooling demand indoors, it is determined that the opening of the first throttling element is the largest, and the opening of the second throttling element is less than the maximum opening (that is, the second throttling element is in a throttling state). At this time, the water in the hot water tank does not circulate, so the role of the hot water tank as a condenser is limited. Therefore, the outdoor heat exchanger is required as a condenser, that is, the first throttling element is fully open and does not play a throttling role. Further, in the cooling mode, the second throttling element opens the throttling state. The coldness of the refrigerant can be used to further reduce the water temperature of the cold water tank. In this way, the refrigeration energy efficiency of the air-conditioning device is better.

[0098] Similarly, when there is only heat demand indoors, it is determined that the opening of the first throttling element is less than the maximum opening (i.e., it is in a throttling state), and the opening of the second throttling element is zero (i.e., it is in a closed state). Since the cold water circulation pipeline is not conductive, the water in the cold water tank does not circulate, so the second throttling element is closed. At the same time, the water in the cold water tank does not circulate, and the role of the cold water tank as an evaporator is limited. Therefore, the first throttling element opens the throttling state to make the outdoor heat exchanger act as an evaporator. Thereby improving the heating energy efficiency of the air-conditioning device to meet the needs of users.

[0099] In addition, when there is a cooling demand and a heating demand indoors, if the heating demand is less than the cooling demand, the opening of the first throttling element is controlled to be the maximum opening, and the opening of the second throttling element is controlled to be less than the maximum opening. If the heating demand is greater than the cooling demand, the opening of the first throttling element is controlled to be the target opening, and the opening of the second throttling element is controlled to be less than the maximum opening. Among them, the target opening is less than the maximum opening.

[0100] Here, when the heating demand is greater than the cooling demand, it indicates that the heating demand of the condenser in the air-conditioning device is greater than the cooling demand of the evaporator. Therefore, the first throttling element plays a throttling role (that is, the opening of the first throttling element is less than the maximum opening), so that the outdoor heat exchanger acts as an evaporator. In this way, the energy balance in the air-conditioning device is ensured, that is, the heating demand of the condenser is equal to the cooling demand of the evaporator. Similarly, when the heating demand is less than the heating demand, it indicates that the heating demand of the condenser in the air-conditioning device is less than the cooling demand of the evaporator. Therefore, the first throttling element does not play a throttling role (that is, the opening of the first throttling element is the maximum), so that the indoor heat exchanger acts as a condenser.

[0101] It should be noted that the cooling demand described here refers to the user's active demand to lower the indoor temperature or to dehumidify the indoor room. It does not include the passive demand for lowering the indoor temperature due to defrosting of the outdoor heat exchanger. Therefore, when there is a cooling demand and a heating demand indoors, and the cooling demand is caused by the air-conditioning device running in the defrost mode, the first throttling element is controlled to be in a fully open state and the second throttling element is in a closed state. At this time, because the outdoor heat exchanger is frosted, the indoor heat exchanger should be a condenser to melt the frost layer. Therefore, the first throttling element is in a fully open state. Moreover, defrosting indicates that the outdoor heat exchanger is severely frosted and frozen, which generally occurs in cold seasons. The indoor heating mode is usually operated. Therefore, the cold water circulation loop does not work, and the opening of the second throttling element is zero.

[0102] Combination Figure 7 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] Combination Figure 8As shown, an embodiment of the present disclosure provides an air-conditioning device 300, including: an air-conditioning device 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, 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.

[0107] 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.

[0108] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0109] 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 magnetic disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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 compressor, a hot water tank, a first throttling element, an outdoor heat exchanger, a cold water tank, and a liquid storage tank connected in sequence to form a refrigerant circulation loop; The indoor water circulation system comprises an indoor heat exchanger, a first end of which is connected to the water outlet of the cold water tank and a hot water tank through a cold water pipeline, and a second end of which is connected to the water inlet of the cold water tank and the hot water tank through a return water pipeline; A return water three-way valve is arranged on the return water pipeline, and the valve direction of the return water three-way valve is adjusted to control the water in the return water pipeline to flow back to the cold water tank and / or the hot water tank.

2. 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; The first end of the first indoor heat exchanger is connected to the cold water pipeline through the first stop valve; the first end of the second indoor heat exchanger is connected to the hot water pipeline through the first three-way valve; the second ends of the first indoor heat exchanger and the second indoor heat exchanger are both connected to the return water pipeline; The third end of the first three-way valve is connected between the first stop valve and the first end of the first indoor heat exchanger.

3. The air conditioning device according to claim 1 or 2, characterized in that: Also includes: The ejector comprises a first inlet, a second inlet and an outlet, wherein the first inlet is connected to the outdoor heat exchanger, and the outlet is connected to the first inlet of the cold water tank; The second inlet is connected to the liquid storage tank through the cold water tank and the second throttling element to form a cold water tank temperature regulating bypass.

4. The air conditioning device according to claim 3, characterized in that: The cold water tank comprises: A first cold water tank comprises a first inlet and a first outlet, wherein the first inlet is connected to the outlet of the ejector, and the first outlet is connected to the inlet of the liquid storage tank; A second cold water tank comprises a second inlet and a second outlet, wherein the second inlet is connected to the second outlet of the liquid storage tank, the second outlet is connected to the second inlet of the ejector, and the second throttling element is arranged in the pipeline between the second outlet of the liquid storage tank and the second inlet of the second cold water tank; The first cold water tank is connected to the second cold water tank through a pipeline, the second cold water tank is provided with a water outlet, and the first cold water tank is provided with a water inlet.

5. 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 4, the control method comprises: Determine a target operating mode of the air conditioning device and cooling and heating demand corresponding to the target operating mode; According to the target operation mode, control the status of the cold and hot water pipelines and the conduction direction of the return water three-way valve; and, Control the opening of the return water three-way valve according to the demand for cooling and heating.

6. The method according to claim 5, characterized in that According to the target operation mode, controlling the status of the cold and hot water pipelines and the conduction direction of the return water three-way valve includes: When the target operation mode is unique, the cold water pipeline or the hot water pipeline corresponding to the target operation mode is controlled to be connected, and the valve direction of the return water three-way valve corresponding to the target operation mode is controlled to be connected; wherein the heating mode corresponds to the first valve direction of the return water three-way valve, and the cooling mode corresponds to the second valve direction of the three-way valve; When the target operation mode is not unique, the cold water pipeline and the hot water pipeline are controlled to be connected, and the first valve direction and the second valve direction of the return water three-way valve are both connected.

7. The method according to claim 6, characterized in that Control the conduction of cold water pipes and / or hot water pipes, including: When the target operation modes of the first heat exchanger and the second heat exchanger are the same, if the target operation mode is the cooling mode, the first stop valve is controlled to be turned on, and the first three-way valve is in the first state; if the target operation mode is the heating mode, the first stop valve is controlled to be turned off, and the first three-way valve is in the second state; When the target operation modes of the first heat exchanger and the second heat exchanger are different, the first stop valve is controlled to be turned on, and the first three-way valve is in a third state; Among them, the first state refers to the state in which the two ends of the first three-way valve connecting the first heat exchanger and the second heat exchanger are conductive; the second state refers to the state in which all three ends of the first three-way valve are conductive; the third state refers to the state in which the two ends of the first three-way valve connecting the second heat exchanger and the hot water pipeline are conductive.

8. The method according to claim 5, characterized in that According to the demand for cooling and heating, control the opening of the return water three-way valve, including: When there is only heating demand or cooling demand indoors, the corresponding valve opening of the return water three-way valve is controlled to be kept at the maximum; When there is a heating demand and a cooling demand indoors, the ratio of the second valve opening and the first valve opening of the return water three-way valve is controlled according to the ratio of the cooling demand to the heating demand.

9. A control device for an air conditioning device, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the control method for an air conditioning device according to any one of claims 5 to 8 when running the program instructions.

10. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the control method for an air conditioning device according to any one of claims 5 to 8 is executed.

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