Control method and device for air conditioning system and air conditioning system

Abstract

The invention relates to the technical field of refrigeration equipment, and discloses a control method for an air conditioning system, and the air conditioning system comprises an evaporator assembly which comprises a first heat exchange unit, a second dehumidification valve, a second heat exchange unit, a first dehumidification valve and a third heat exchange unit which are sequentially connected in series; the condenser assembly comprises a fourth heat exchange unit and a fifth heat exchange unit which are connected in parallel, one common connecting end of the fourth heat exchange unit and one common connecting end of the fifth heat exchange unit are connected with the control valve and then connected with the first heat exchange unit, and the method comprises the steps that the indoor temperature and the indoor humidity of the indoor space are obtained; determining a target operation mode according to the indoor temperature and the indoor humidity; and according to the target operation mode, opening and closing of each dehumidification valve and / or opening and closing of a control valve are / is controlled, so that the air conditioning system operates according to the target operation mode. According to the method, a simplified control scheme for operation refrigeration or constant-temperature dehumidification and cooling dehumidification can be provided. The invention further discloses a control device for the air conditioning system and the air conditioning system.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, such as a control method and device for an air conditioning system, and an air conditioning system. Background Technology

[0002] Currently, with the rapid development of science and technology, air conditioners, in addition to traditional cooling and heating functions, also have dehumidification and ventilation functions. To achieve dehumidification, existing air conditioners configure the main throttling mechanism connected to the outdoor heat exchanger to be fully open, and divide the indoor heat exchanger into two sections. A secondary throttling mechanism is connected in series between the two sections, and this secondary throttling mechanism is in a throttling state. Thus, regardless of whether the air conditioner is in cooling or heating cycle, the refrigerant entering the first section of the indoor heat exchanger is in a condensing and heat-releasing state; this section is the heating section. Under the throttling effect of the secondary throttling mechanism, the refrigerant entering the second section of the indoor heat exchanger is a low-pressure fluid; this section is the dehumidification section, thus achieving the dehumidification effect. In this way, during dehumidification operation, the air conditioner achieves condensation and evaporation through the two heat exchangers respectively, achieving dehumidification without cooling. However, when operating in the non-cooling dehumidification mode, the above-mentioned air conditioners do not consider the difference between the set temperature and the indoor temperature, and cannot independently control the indoor temperature and humidity.

[0003] To balance indoor temperature and humidity when operating in dehumidification mode without cooling, a control method for a constant-temperature dehumidification air conditioner is disclosed. The constant-temperature dehumidification air conditioner includes a compressor, a solenoid four-way reversing valve, an outdoor heat exchanger, a filter, a throttling electronic expansion valve, and an indoor heat exchanger. The indoor heat exchanger is divided into a dehumidification section and a heating section. A dehumidification solenoid valve is installed between the dehumidification section and the indoor heat exchanger. Several temperature and humidity sensors are installed in the air conditioner system. The method includes: detecting the indoor temperature using an indoor temperature sensor installed inside the air conditioner, comparing the detected indoor temperature tr with a set temperature to obtain the temperature difference, which conforms to the following expression: e = tr - ts, where ts is the set temperature; ... Based on the temperature difference e, the air conditioner's dehumidification operation mode is divided into a dehumidification cooling zone and a dehumidification dehumidification zone. Further, the dehumidification dehumidification zone is subdivided into a cooling dehumidification zone, a constant temperature dehumidification zone, a heating dehumidification zone, and a heating zone. When the air conditioner is in the dehumidification cooling zone, the indoor dehumidification solenoid valve is de-energized and in the open state. The air conditioner controller sends a cooling operation signal to the outdoor unit, and the frequency control of the outdoor compressor, the speed control of the outdoor fan, and the control of the throttling electronic expansion valve are all controlled according to the cooling operation mode. When the air conditioner is in the dehumidification dehumidification zone, the indoor dehumidification solenoid valve is energized and in the throttling working state. The air conditioner controller sends a dehumidification operation signal to the outdoor unit, and the frequency control of the outdoor compressor, the speed control of the outdoor fan, and the control of the throttling electronic expansion valve are all controlled according to the dehumidification operation mode.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] To achieve cooling-down dehumidification, constant-temperature dehumidification, and heating-up dehumidification, the relevant technologies require a reasonable allocation of the dehumidification section and heating section of the indoor heat exchanger. Furthermore, it necessitates coordinated control of the throttling electronic expansion valve, dehumidification solenoid valve, outdoor fan speed, and compressor operating frequency. Since the heat exchange area of ​​both the dehumidification and heating sections of the indoor heat exchanger is a constant, precise control of the electronic expansion valve, dehumidification solenoid valve, outdoor fan speed, and compressor operating frequency is required to operate these multiple dehumidification modes. This complex control process is challenging and makes it difficult to achieve cooling, constant-temperature, or heating during dehumidification.

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

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides a control method and apparatus for an air conditioning system, and an air conditioning system, to provide a simplified control scheme for operating in a cooling mode, a constant temperature dehumidification mode, or a cooling and dehumidification mode.

[0009] In some embodiments, the method includes: an air conditioning system comprising: an evaporator assembly including a first heat exchange unit and a second dehumidification valve, a second heat exchange unit, a first dehumidification valve, and a third heat exchange unit connected in series; and a condenser assembly including a fourth heat exchange unit and a fifth heat exchange unit connected in parallel, wherein one common connection terminal of the fourth heat exchange unit and the fifth heat exchange unit is connected to a control valve and then connected to the first heat exchange unit. The method includes: acquiring the indoor temperature and indoor humidity of the indoor space; determining a target operating mode based on the indoor temperature and indoor humidity; and controlling the opening and closing of each dehumidification valve and / or the control valve according to the target operating mode, so that the air conditioning system operates according to the target operating mode.

[0010] In some embodiments, controlling the opening and closing of each dehumidification valve and / or the opening and closing of the control valve according to the target operating mode includes: when the target operating mode represents a cooling mode, controlling both the first dehumidification valve and the second dehumidification valve to be fully open, and controlling the control valve to open, so that all heat exchange units of the evaporator assembly are connected in series to form a cooling system.

[0011] In some embodiments, the heat exchange area of ​​the first heat exchange unit is matched with the sum of the heat exchange areas of the second and third heat exchange units. According to the target operating mode, the opening and closing of each dehumidification valve and / or the opening and closing of the control valve are controlled, including: when the target operating mode represents a constant temperature dehumidification mode, controlling the first dehumidification valve and the control valve to be fully open, and controlling the second dehumidification valve to be opened to reheat the first heat exchange unit, and the second and third heat exchange units dehumidify.

[0012] In some embodiments, controlling the opening and closing of each dehumidification valve and / or the opening and closing of the control valve according to the target operating mode includes: when the target operating mode represents a heating and dehumidification mode, controlling the first dehumidification valve to open, and controlling the second dehumidification valve and the control valve to be fully open to reheat the first heat exchange unit and the second heat exchange unit, and dehumidifying the third heat exchange unit.

[0013] In some embodiments, controlling the valve to open includes: controlling the valve to open according to an opening threshold; wherein the opening threshold is less than the upper limit threshold of the valve opening, and the valve includes a dehumidifying valve or a control valve.

[0014] In some embodiments, determining a target operating mode based on indoor temperature and indoor humidity includes: determining a cooling mode when the indoor temperature is greater than an upper temperature threshold; determining a constant temperature dehumidification mode when the indoor temperature is within a temperature threshold range and the indoor humidity is greater than a lower humidity threshold; and determining a heating dehumidification mode when the indoor temperature is less than a lower temperature threshold and the indoor humidity is greater than a lower humidity threshold. The temperature threshold range represents (lower temperature threshold, upper temperature threshold).

[0015] In some embodiments, the apparatus includes a processor and a memory storing program instructions, the processor being configured to execute the aforementioned control method for an air conditioning system when the program instructions are executed.

[0016] In some embodiments, an air conditioning system includes: an evaporator assembly including a first heat exchange unit and a second dehumidification valve, a second heat exchange unit, a first dehumidification valve, and a third heat exchange unit connected in series; and a condenser assembly including a fourth heat exchange unit and a fifth heat exchange unit connected in parallel, wherein one common connection terminal of the fourth heat exchange unit and the fifth heat exchange unit is connected to a control valve and then connected to the first heat exchange unit.

[0017] In some embodiments, the air conditioning system further includes: a control device for the air conditioning system as described above, installed on the evaporator assembly and the condenser assembly.

[0018] In some embodiments, the heat exchange area of ​​the first heat exchange unit is greater than that of the second heat exchange unit, and the heat exchange area of ​​the first heat exchange unit is greater than that of the third heat exchange unit.

[0019] The control method and apparatus for air conditioning systems and the air conditioning systems provided in this disclosure can achieve the following technical effects:

[0020] This embodiment of the disclosure, through coordinated control of two dehumidification valves and a control valve, enables the heat exchange unit of the evaporator assembly to be configured as a reheat unit or a dehumidification unit. This allows the medium-temperature, high-pressure refrigerant to first flow through the reheat unit, then be throttled by the dehumidification valve before flowing into the dehumidification unit, thereby achieving a constant-temperature dehumidification mode or a heating-up dehumidification mode. Alternatively, by coordinating the control valves and dehumidification valves, all heat exchange units of the evaporator assembly can be connected in series and configured as a regular evaporator, thus achieving a cooling mode. In summary, this embodiment of the disclosure eliminates the need to control the compressor operating frequency, outdoor fan speed, etc., and only requires valve control via two dehumidification valves and a control valve to operate in constant-temperature dehumidification, heating-up defrosting, or cooling modes, thus providing a simplified control scheme for operating in cooling, constant-temperature dehumidification, or cooling-down dehumidification modes.

[0021] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0023] Figure 1 This is a schematic diagram of the system structure of an air conditioning system provided in an embodiment of this disclosure;

[0024] Figure 2 This is a schematic diagram of the structure of an evaporator assembly provided in an embodiment of this disclosure;

[0025] Figure 3 This is a schematic diagram of a control method for an air conditioning system provided in an embodiment of this disclosure;

[0026] Figure 4 This is an application illustration of an embodiment of the present disclosure;

[0027] Figure 5 This is a schematic diagram of a control device for an air conditioning system provided in an embodiment of this disclosure;

[0028] Figure 6 This is a schematic diagram of an air conditioning system provided in an embodiment of this disclosure.

[0029] Figure label:

[0030] 1: Air conditioning system;

[0031] 10: Evaporator assembly; 20: Condenser assembly;

[0032] 30: Compressor; 40: Four-way valve; 50: Electronic expansion valve;

[0033] 60: Oil separator; 70: Liquid storage tank;

[0034] 101: First heat exchange unit; 102: Second dehumidification valve; 103: Second heat exchange unit;

[0035] 104: First dehumidification valve; 105: Third heat exchange unit;

[0036] 201: Fourth heat exchange unit; 202: Fifth heat exchange unit; 203: Control valve;

[0037] 70: Control devices used in air conditioning systems;

[0038] 700: Processor; 701: Memory;

[0039] 702: Communication interface; 703: Bus. Detailed Implementation

[0040] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0041] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0042] Unless otherwise stated, the term "multiple" means two or more.

[0043] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0044] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0045] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.

[0046] Combination Figure 1 As shown, the air conditioning system 1 includes an evaporator assembly 10, a four-way valve 40, a condenser assembly 20, an electronic expansion valve 50, and a compressor 30. The evaporator assembly 10, the four-way valve 40E port, the four-way valve 40C port, and the condenser assembly 20 are connected sequentially by pipes. The four-way valve 40D port is connected to the discharge port of the compressor 30, and the compressor 30 intake port is connected to the four-way valve 40S port through a gas-liquid separator 70.

[0047] Combination Figure 2 As shown, the evaporator assembly 10 includes a first heat exchange unit 101, a second dehumidification valve 102, a second heat exchange unit 103, a first dehumidification valve 104, and a third heat exchange unit 105 connected in series.

[0048] The condenser assembly 20 includes a fourth heat exchange unit 201 and a fifth heat exchange unit 202 connected in parallel. One of the common connection terminals of the fourth heat exchange unit 201 and the fifth heat exchange unit 202 is connected to the control valve 203 and then connected to the first heat exchange unit 101.

[0049] In the air conditioning system provided by this disclosure, the compressor compresses the gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant. The gaseous refrigerant is then transported to the condenser assembly via a four-way valve for cooling, where it becomes a medium-temperature, high-pressure liquid refrigerant. After being throttled and depressurized by an electronic expansion valve, it forms a low-temperature, low-pressure gas-liquid mixture. When the gas-liquid mixture passes through the evaporator assembly, it vaporizes back into a gaseous refrigerant and returns to the compressor to continue the refrigerant compression process, thus continuing the refrigerant cycle to achieve refrigeration. In this embodiment, a second dehumidifying valve is connected in series between the first and second heat exchange units of the evaporator assembly, and a first dehumidifying valve is connected in series between the second and third heat exchange units. At the same time, a control valve is configured in the condenser assembly. By coordinating the control valve and the two dehumidifying valves, some heat exchange units of the evaporator assembly can be reheated and configured as reheating units, and some heat exchange units can be dehumidified and configured as dehumidifying units. The heat exchange area of ​​the reheating unit and the dehumidifying unit is adjustable in terms of physical structure. This allows the medium-temperature high-pressure refrigerant to flow through the reheating unit first, then through the dehumidifying valve for throttling, and then into the dehumidifying unit, thereby achieving cooling mode, constant temperature dehumidification, or heating dehumidification.

[0050] In one specific embodiment, the first dehumidification valve 104 is an electronic expansion valve, and the second dehumidification valve 102 is an electronic expansion valve. Thus, by adjusting the opening degree of the electronic expansion valve, the dehumidification valves achieve a throttling and pressure-reducing effect.

[0051] Optionally, the heat exchange area of ​​the first heat exchange unit 101 is greater than the heat exchange area of ​​the second heat exchange unit 102, and the heat exchange area of ​​the first heat exchange unit 101 is greater than the heat exchange area of ​​the third heat exchange unit 103.

[0052] Optionally, the heat exchange area of ​​the first heat exchange unit 101 is matched with the sum of the heat exchange areas of the second heat exchange unit 102 and the third heat exchange unit 103. It should be noted that matching the heat exchange area of ​​the first heat exchange unit 101 with the sum of the heat exchange areas of the second heat exchange unit 102 and the third heat exchange unit 103 includes: the heat exchange area of ​​the first heat exchange unit 101 is greater than or equal to the difference between the sum and the area deviation, and less than or equal to the sum of the sum and the area deviation; wherein, the sum represents the sum of the heat exchange areas of the second heat exchange unit 102 and the third heat exchange unit 103. The area deviation is a positive real number close to zero.

[0053] In one specific embodiment, the heat exchange area of ​​the first heat exchange unit 101 is equal to the sum of the heat exchange areas of the second heat exchange unit 102 and the third heat exchange unit 103. Thus, when the first heat exchange unit acts as a reheating unit and both the second and third heat exchange units act as dehumidification units, the heat exchange area of ​​the reheating unit is comparable to the heat exchange areas of all the dehumidification units, ensuring a constant temperature during dehumidification and achieving constant-temperature dehumidification.

[0054] Optionally, combined Figure 1 As shown, the air conditioning system 1 also includes an oil separator 60. The top port of the oil separator 60 is connected to the port of the four-way valve 40D, and the bottom port of the oil separator 60 is connected to the intake port of the compressor 30. A side port of the oil separator 60 is also connected to the exhaust port of the compressor 30.

[0055] It should be noted that the executing entity in this embodiment can be a processor configured in an air conditioning system or a server communicatively connected to the air conditioning system. This embodiment does not impose specific limitations on this. The following embodiments are described with the executing entity being a processor configured in an air conditioning system.

[0056] Based on the above-mentioned structural configuration of the air conditioning system, combined with Figure 3 As shown, this disclosure provides a control method for an air conditioning system, including:

[0057] S01, the processor obtains the indoor temperature and humidity of the indoor space.

[0058] S02, the processor determines the target operating mode based on indoor temperature and humidity.

[0059] In this step, the target operating mode includes cooling mode, constant temperature dehumidification mode, or heating dehumidification mode.

[0060] S03, the processor controls the opening and closing of each dehumidification valve and / or the opening and closing of the control valve according to the target operating mode, so that the air conditioning system operates according to the target operating mode.

[0061] The control method for an air conditioning system provided in this disclosure acquires the indoor temperature and humidity of the indoor space, and then determines a target operating mode based on these parameters. Based on the target operating mode, this disclosure further controls the opening and closing of each dehumidification valve and / or control valve to ensure the air conditioning system operates according to the target operating mode. By coordinating the control of two dehumidification valves and the control valve, this disclosure enables the heat exchange unit of the evaporator assembly to be configured as a reheat unit or a dehumidification unit. This allows the medium-temperature, high-pressure refrigerant to first flow through the reheat unit, then be throttled by the dehumidification valve, and finally flow into the dehumidification unit, thereby achieving a constant-temperature dehumidification mode or a temperature-increasing dehumidification mode. Alternatively, by coordinating the control of the dehumidification valve and the control valve, all heat exchange units of the evaporator assembly can be connected in series and configured as a regular evaporator, thereby achieving a cooling mode. In summary, the embodiments disclosed herein do not require control of the compressor operating frequency, outdoor fan speed, etc., and can operate in constant temperature dehumidification, heating defrosting mode or cooling mode simply by controlling the valves of two dehumidification valves and a control valve, thereby providing a simplified control scheme for operating in cooling mode, constant temperature dehumidification mode, or cooling dehumidification mode.

[0062] Optionally, the processor controls the opening and closing of each dehumidification valve and / or the opening and closing of the control valve according to the target operating mode, including:

[0063] When the target operating mode indicates the cooling mode, the processor controls both the first and second dehumidification valves to be fully open, and controls the control valve to open, so that all heat exchange units of the evaporator assembly are connected in series to form a cooling system.

[0064] Thus, when the target operating mode indicates the cooling mode, the embodiments of this disclosure control both the first dehumidification valve and the second dehumidification valve to be fully open, so that the first heat exchange unit, the second heat exchange unit, and the third heat exchange unit are connected in series, and at the same time control the control valve to open to achieve cooling.

[0065] Optionally, the processor controls the opening and closing of each dehumidification valve and / or the opening and closing of the control valve according to the target operating mode, including:

[0066] When the target operating mode indicates constant temperature dehumidification mode, the processor controls the first dehumidification valve and the control valve to be fully open, and controls the second dehumidification valve to be opened so that the first heat exchange unit is reheated, and the second heat exchange unit and the third heat exchange unit dehumidify.

[0067] Thus, when the target operating mode is constant temperature and dehumidification mode, the refrigerant is compressed into a high-temperature, high-pressure gaseous refrigerant by the compressor. Ports D and C of the four-way valve are connected, as are ports E and C. The high-temperature, high-pressure gaseous refrigerant flows through the four-way valve, is cooled by the condenser assembly, and then flows through the fully open control valve. Since the control valve is fully open and does not have a throttling function, the refrigerant state flowing into the fourth and fifth heat exchange units remains unchanged. The high-temperature, high-pressure gaseous refrigerant continues to flow into the evaporator assembly and is further cooled by the first heat exchange unit. At this time, the first heat exchange unit is configured as a reheat unit, and the second and third heat exchange units are both configured as dehumidification units. The refrigerant flows through the first heat exchange unit and then undergoes throttling and pressure reduction through the second dehumidification valve. Since the first dehumidification valve is fully open and does not have a throttling function, the refrigerant flows sequentially through the second and third heat exchange units for evaporation and heat absorption. Furthermore, since the heat exchange area of ​​the first heat exchange unit matches the sum of the heat exchange areas of the second and third heat exchange units, that is, the heat exchange area of ​​the reheat unit is comparable to the heat exchange area of ​​the dehumidification unit, the indoor temperature remains basically constant during dehumidification, thus achieving constant temperature dehumidification.

[0068] Optionally, the processor controls the opening and closing of each dehumidification valve and / or the opening and closing of the control valve according to the target operating mode, including: when the target operating mode indicates a heating and dehumidification mode, the processor controls the first dehumidification valve to open, and controls the second dehumidification valve and the control valve to be fully open so that the first heat exchange unit and the second heat exchange unit are reheated, and the third heat exchange unit is dehumidified.

[0069] Thus, when the target operating mode indicates heating and dehumidification mode, the refrigerant is compressed into a high-temperature, high-pressure gaseous refrigerant by the compressor. Ports D and C of the four-way valve are connected, as are ports E and C. The high-temperature, high-pressure gaseous refrigerant flows through the four-way valve, is cooled by the condenser assembly, and then flows through the fully open control valve. Since the control valve is fully open and does not have a throttling function, the refrigerant state flowing into the fourth and fifth heat exchange units remains unchanged, and the high-temperature, high-pressure gaseous refrigerant continues to flow into the evaporator assembly. At this time, the second dehumidification valve is fully open and does not have a throttling function. The refrigerant continues to be cooled by the first and second heat exchange units, both of which are configured as reheat units, while the third heat exchange unit is configured as a dehumidification unit. The refrigerant then flows through the first dehumidification valve for throttling and pressure reduction, and then flows through the third heat exchange unit for evaporation and heat absorption. Furthermore, since the heat exchange area of ​​the first heat exchange unit is larger than that of the second heat exchange unit, and the heat exchange area of ​​the first heat exchange unit is larger than that of the third heat exchange unit, the sum of the heat exchange areas of the first and second heat exchange units is greater than the heat exchange area of ​​the third heat exchange unit. In other words, the heat exchange area of ​​the reheating unit is larger than that of the dehumidification unit. Therefore, the indoor temperature rises during dehumidification, thus achieving heating and dehumidification.

[0070] Optionally, the processor controls the valve to open, including: the processor controls the valve to open according to an opening threshold. The opening threshold is less than the upper limit threshold of the valve's opening, and the valve includes a dehumidifier valve or a control valve. The dehumidifier valve includes a first dehumidifier valve or a second dehumidifier valve.

[0071] In this way, the processor can control the valve to open according to the opening threshold, and the opening threshold is less than the upper limit threshold of the valve opening, so as to achieve the throttling and pressure reduction effect.

[0072] It should be noted that, when the valve is a dehumidifier, the processor determines the first opening threshold of the dehumidifier as the opening threshold, and also determines the first upper opening threshold of the dehumidifier as the upper opening threshold. When the valve is a control valve, the processor determines the second opening threshold of the control valve as the opening threshold, and also determines the second upper opening threshold of the control valve as the upper opening threshold.

[0073] Optionally, the processor determines the target operating mode based on indoor temperature and humidity, including:

[0074] When the indoor temperature exceeds the upper temperature threshold, the processor determines the target operating mode as cooling mode.

[0075] When the indoor temperature is within the temperature threshold range and the indoor humidity is greater than the lower humidity threshold, the processor determines the target operating mode as constant temperature dehumidification mode.

[0076] When the indoor temperature is below the lower limit threshold and the indoor humidity is above the lower limit threshold, the processor determines the target operating mode as the heating and dehumidification mode.

[0077] The temperature threshold range is represented by (lower temperature threshold and upper temperature threshold).

[0078] Thus, after obtaining the indoor temperature and humidity, this embodiment compares the indoor temperature with an upper temperature threshold and a lower temperature threshold, and simultaneously compares the indoor humidity with a lower humidity threshold. If the indoor temperature is greater than the upper temperature threshold, it indicates that the indoor temperature is too high, requiring the cooling mode to be activated, and the target operating mode is determined to be the cooling mode. If the indoor temperature is within the temperature threshold range and the indoor humidity is greater than the lower humidity threshold, it indicates that the indoor temperature is suitable but the indoor humidity is too high, requiring dehumidification without cooling, and the target operating mode is determined to be the constant temperature dehumidification mode. If the indoor temperature is less than the lower temperature threshold and the indoor humidity is greater than the lower humidity threshold, it indicates that the indoor temperature is too low and the indoor humidity is too high, requiring both heating and dehumidification to be balanced, and the target operating mode is determined to be the heating and dehumidification mode. This embodiment can accurately determine the operating mode required for the air conditioning system based on the indoor temperature and the values ​​of the upper and lower temperature thresholds, the indoor humidity and the lower humidity thresholds.

[0079] In one specific embodiment, the lower temperature threshold is greater than 22°C and less than or equal to 25°C, and the upper temperature threshold is greater than or equal to 26°C and less than or equal to 28°C. Preferably, the upper temperature threshold is equal to 27°C, and the lower temperature threshold is equal to 24°C.

[0080] In practical applications, such as Figure 4 As shown, the control method for the air conditioning system specifically performs the following steps:

[0081] S11, the processor obtains the indoor temperature and humidity of the indoor space.

[0082] S12, the processor determines the target operating mode based on indoor temperature and humidity.

[0083] S13, when the target operating mode indicates the cooling mode, the processor controls both the first and second dehumidification valves to be fully open, and controls the control valve to open, so that all heat exchange units of the evaporator assembly are connected in series to form a cooling system.

[0084] S14, when the target operating mode indicates constant temperature dehumidification mode, the processor controls the first dehumidification valve and the control valve to be fully open, and controls the second dehumidification valve to be opened so that the first heat exchange unit is reheated, and the second heat exchange unit and the third heat exchange unit dehumidify.

[0085] S15, when the target operating mode indicates heating and dehumidification mode, the processor controls the first dehumidification valve to open, and controls the second dehumidification valve and the control valve to be fully opened so that the first heat exchange unit and the second heat exchange unit are reheated, and the third heat exchange unit is dehumidified.

[0086] Combination Figure 5 As shown, this disclosure provides a control device 70 for an air conditioning system, including a processor 700 and a memory 701. Optionally, the device 70 may further include a communication interface 702 and a bus 703. The processor 700, communication interface 702, and memory 701 can communicate with each other via the bus 703. The communication interface 702 can be used for information transmission. The processor 700 can call logical instructions in the memory 701 to execute the control method for the air conditioning system described in the above embodiment.

[0087] Furthermore, the logic instructions in the aforementioned memory 701 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0088] The memory 701, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 700 executes functional applications and data processing by running the program instructions / modules stored in the memory 701, thereby implementing the control method for the air conditioning system in the above embodiments.

[0089] The memory 701 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 701 may include high-speed random access memory and may also include non-volatile memory.

[0090] Combination Figure 6 As shown, this disclosure provides an air conditioning system 1, including an evaporator assembly and a condenser assembly. The evaporator assembly includes a first heat exchange unit and a second dehumidification valve, a second heat exchange unit, a first dehumidification valve, and a third heat exchange unit connected in series. The condenser assembly includes a fourth heat exchange unit and a fifth heat exchange unit connected in parallel. One common connection terminal of the fourth and fifth heat exchange units is connected to a control valve and then to the first heat exchange unit.

[0091] Optionally, the air conditioning system 1 also includes the aforementioned control device 70 for the air conditioning system. The control device 70 is installed in the evaporator assembly and the condenser assembly. The installation relationship described herein is not limited to placement within the evaporator assembly and the condenser assembly, but also includes installation connections with other components of the air conditioning system 1, including but not limited to physical connections, electrical connections, or signal transmission connections. Those skilled in the art will understand that the control device 70 for the air conditioning system can be adapted to any feasible air conditioning system body, thereby realizing other feasible embodiments.

[0092] This disclosure provides a computer-readable storage medium storing computer-executable instructions configured to perform the above-described control method for an air conditioning system.

[0093] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, such as a USB flash drive, external hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk, etc., and other media capable of storing program code.

[0094] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0095] Those skilled in the art will recognize that the units and algorithm steps of the various examples 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 implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0096] The methods and products (including but not limited to devices and equipment) disclosed in the embodiments herein can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. Furthermore, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0097] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A control method for an air conditioning system, characterized in that, The air conditioning system includes: an evaporator assembly comprising a first heat exchange unit and a second dehumidification valve, a second heat exchange unit, a first dehumidification valve, and a third heat exchange unit connected in series; and a condenser assembly comprising a fourth heat exchange unit and a fifth heat exchange unit connected in parallel, wherein one common connection terminal of the fourth and fifth heat exchange units is connected to a control valve and then connected to the first heat exchange unit, the method comprising: To obtain the indoor temperature and humidity of the indoor space; Determine the target operating mode based on indoor temperature and humidity; According to the target operating mode, control the opening and closing of each dehumidification valve and / or control valve to make the air conditioning system operate in accordance with the target operating mode.

2. The method according to claim 1, characterized in that, Based on the target operating mode, control the opening and closing of each dehumidification valve and / or the opening and closing of the control valve, including: When the target operating mode indicates the cooling mode, both the first and second dehumidification valves are fully opened, and the control valve is opened so that all heat exchange units of the evaporator assembly are connected in series to form a cooling system.

3. The method according to claim 1, characterized in that, The heat exchange area of ​​the first heat exchange unit is matched with the sum of the heat exchange areas of the second and third heat exchange units. Based on the target operating mode, the opening and closing of each dehumidification valve and / or the opening and closing of the control valve are controlled, including: When the target operating mode indicates constant temperature dehumidification mode, the first dehumidification valve and the control valve are fully opened, and the second dehumidification valve is opened to reheat the first heat exchange unit, and the second heat exchange unit and the third heat exchange unit dehumidify.

4. The method according to claim 1, characterized in that, Based on the target operating mode, control the opening and closing of each dehumidification valve and / or the opening and closing of the control valve, including: When the target operating mode indicates a heating and dehumidification mode, the first dehumidification valve is opened, and the second dehumidification valve and the control valve are fully opened to reheat the first heat exchange unit and the second heat exchange unit, and to dehumidify the third heat exchange unit.

5. The method according to any one of claims 2 to 4, characterized in that, Controlling valve opening includes: The control valve opens according to an opening threshold; wherein the opening threshold is less than the upper limit threshold of the valve opening, and the valve includes a dehumidification valve or a control valve.

6. The method according to any one of claims 1 to 4, characterized in that, Based on indoor temperature and humidity, determine the target operating mode, including: When the indoor temperature is higher than the upper temperature threshold, the target operating mode is determined to be the cooling mode; When the indoor temperature is within the temperature threshold range and the indoor humidity is greater than the lower humidity threshold, the target operating mode is determined to be constant temperature dehumidification mode. When the indoor temperature is below the lower limit threshold and the indoor humidity is above the lower limit threshold, the target operating mode is determined to be the heating and dehumidification mode. The temperature threshold range is represented by (lower temperature threshold and upper temperature threshold).

7. A control device for an air conditioning system, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to execute, when running the program instructions, the control method for an air conditioning system as described in any one of claims 1 to 6.

8. An air conditioning system, characterized in that, include: The evaporator assembly includes a first heat exchange unit and a second dehumidification valve, a second heat exchange unit, a first dehumidification valve, and a third heat exchange unit connected in series. The condenser assembly includes a fourth heat exchange unit and a fifth heat exchange unit connected in parallel. One of the common connection terminals of the fourth and fifth heat exchange units is connected to a control valve and then to a first heat exchange unit.

9. The air conditioning system according to claim 8, characterized in that, The air conditioning system also includes: The control device for an air conditioning system as described in claim 7 is installed on the evaporator assembly and the condenser assembly.

10. The air conditioning system according to claim 8, characterized in that, The heat exchange area of ​​the first heat exchange unit is greater than that of the second heat exchange unit, and the heat exchange area of ​​the first heat exchange unit is greater than that of the third heat exchange unit.

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