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 an air conditioning system. An evaporator pipe set comprises a first pipeline and a second pipeline which are connected in parallel; the first dehumidification valve is mounted at the common output end of the first pipeline and the second pipeline; the first control valve is connected with the first dehumidification valve in series; one ends of the fifth control valve and the sixth control valve are connected with the input end of the pipe group; one end of the third control valve is connected with the other end of the sixth control valve and the other end of the fifth control valve, and the other end is connected with the common end of the first dehumidification valve and the first control valve; two ends of the third pipeline are respectively connected with the other end of the fifth control valve and the open end of the first control valve; one end of the second dehumidifying valve is connected with the open end of the first control valve; one end of the fourth pipeline is connected with the other end of the sixth control valve; two ends of the second control valve are respectively connected with the other end of the second dehumidification valve and the pipe group output end; one end of the fourth control valve is connected with a common connection end of the third control valve and the sixth control valve, and the other end is connected with a common end of the second dehumidification valve and the second control valve.

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, apparatus, and air conditioning system for 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 air conditioning system includes an evaporator tube assembly, which includes: a first pipe configured with a first heat exchange unit; a second pipe connected in parallel with the first pipe, the parallel connection end being the tube assembly input end of the evaporator tube assembly, configured with a second heat exchange unit; a first dehumidification valve installed at the common output end of the first and second pipes; a first control valve connected in series with the first dehumidification valve; a fifth control valve, one end of which is connected to the tube assembly input end of the evaporator tube assembly; a sixth control valve, one end of which is connected to the tube assembly input end of the evaporator tube assembly; and a third control valve, one end of which is connected to the other end of the sixth control valve and the other end of the fifth control valve, the other end of which is connected to the first dehumidification valve. The valve and the first control valve are connected to a common connection end; a third pipeline, one end of which is connected to the other end of the fifth control valve and the other end of which is connected to the open end of the first control valve, is configured with a third heat exchange unit; a second dehumidifying valve, one end of which is connected to the open end of the first control valve; a fourth pipeline, one end of which is connected to the other end of the sixth control valve and the other end of which is the tube output end of the evaporator tube group, is configured with a fourth heat exchange unit; a second control valve, one end of which is connected to the other end of the second dehumidifying valve and the other end of which is connected to the tube output end of the evaporator tube group; a fourth control valve, one end of which is connected to the common connection end of the third and sixth control valves and the other end of which is connected to the common connection end of the second dehumidifying valve and the second control valve.

[0010] In some embodiments, the dehumidification valve is an electronic expansion valve with a throttling function; wherein the dehumidification valve includes a first dehumidification valve and a second dehumidification valve.

[0011] In some embodiments, the method, applied to an air conditioning system as described above, includes: acquiring indoor temperature and indoor humidity of an 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 controlling the opening and closing of each control valve according to the target operating mode, so that the air conditioning system operates according to the target operating mode.

[0012] In some embodiments, according to the target operating mode, controlling the opening and closing of each dehumidification valve and / or controlling the opening and closing of each control valve includes: when the target operating mode represents a cooling mode, controlling the first dehumidification valve and the second dehumidification valve to be fully open, and controlling the first control valve, the second control valve, the fifth control valve, and the sixth control valve to be open, and controlling the third control valve and the fourth control valve to be closed, so that the refrigerant flows in parallel in different pipelines to achieve cooling.

[0013] In some embodiments, according to the target operating mode, controlling the opening and closing of each dehumidification valve and / or controlling the opening and closing of each control valve includes: when the target operating mode represents a constant temperature dehumidification mode, controlling the second dehumidification valve to be fully open, controlling the second and third control valves to be open, controlling other control valves to be closed, and controlling the opening degree of the first dehumidification valve so that after the refrigerant flows through the first and second heat exchange units to heat the air and the refrigerant flows through the third and fourth heat exchange units to cool and dehumidify the air, the heated air and the cooled and dehumidified air are mixed at the air outlet of the evaporator tube group and kept at a constant temperature.

[0014] In some embodiments, according to the target operating mode, controlling the opening and closing of each dehumidification valve and / or controlling the opening and closing of each control valve includes: when the target operating mode represents a heating and dehumidification mode, controlling the first dehumidification valve to be fully open, and controlling the first control valve, the fourth control valve, and the fifth control valve to be open, and controlling the other control valves to be closed, and controlling the opening degree of the second dehumidification valve, so that after the refrigerant flows through the first heat exchange unit, the second heat exchange unit, and the third heat exchange unit to heat the air and after the refrigerant flows through the fourth heat exchange unit to cool and dehumidify the air, the heated air and the cooled and dehumidified air are mixed at the air outlet of the evaporator tube group and then heated.

[0015] In some embodiments, the outdoor electronic expansion valve is connected to the evaporator tube bundle via a pipe, and the system further includes: after the target operating mode indicates a constant temperature dehumidification mode or a heating dehumidification mode, controlling the outdoor electronic expansion valve to be fully open so that the refrigerant flows to the evaporator tube bundle without throttling.

[0016] In some embodiments, the device includes: a data acquisition module configured to acquire indoor temperature and indoor humidity of an indoor space; a mode determination module configured to determine a target operating mode based on the indoor temperature and indoor humidity; and an operating module configured to control the opening and closing of each dehumidification valve and / or control the opening and closing of each control valve according to the target operating mode, so that the air conditioning system operates according to the target operating mode.

[0017] In some embodiments, the apparatus includes a processor and a memory storing program instructions, the processor being configured to execute the control method for an air conditioning system as described above when the program instructions are executed.

[0018] In some embodiments, the air conditioning system includes: an evaporator tube assembly; and a control device for the air conditioning system as described above, installed on the evaporator tube assembly.

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

[0020] This embodiment of the disclosure achieves controlled heating or cooling / dehumidification of air in all pipes of the evaporator coil assembly by coordinating the control of two dehumidification valves and six control valves. Simultaneously, the number of pipes for heating air and for cooling / dehumidification is dynamically adjusted through the coordinated control of the two dehumidification valves and six control valves to achieve cooling mode, constant temperature dehumidification mode, or heating / dehumidification mode. In summary, this embodiment of the disclosure eliminates the need to control the compressor operating frequency or outdoor fan speed; the target operating mode can be achieved solely through system control of multiple dehumidification valves and multiple control valves in the evaporator coil assembly of the air conditioning system. This provides a simplified control scheme capable of operating in cooling mode, constant temperature dehumidification mode, or heating / dehumidification mode.

[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 a schematic diagram of another control method for an air conditioning system provided in an embodiment of this 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 another control device for an air conditioning system provided in an embodiment of this disclosure.

[0029] Figure label:

[0030] 1: Air conditioning system; 10: Evaporator tube assembly; 20: Compressor;

[0031] 30: Outdoor electronic expansion valve; 40: Condenser;

[0032] 101: First pipeline; 102: Second pipeline;

[0033] 103: Third pipe; 104: Fourth pipe; 105: First dehumidification valve;

[0034] 106: First control valve; 107: Fifth control valve; 108: Sixth control valve;

[0035] 109: Third control valve; 110: Second dehumidification valve; 111: Second control valve;

[0036] 112: Fourth control valve; 1011: First heat exchange unit; 1021: Second heat exchange unit;

[0037] 1031: Third heat exchange unit; 1041: Fourth heat exchange unit;

[0038] 70(200): Control device for air conditioning systems;

[0039] 700: Processor; 701: Memory;

[0040] 702: Communication interface; 703: Bus. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] Unless otherwise stated, the term "multiple" means two or more.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] Combination Figure 1 As shown, this embodiment of the present disclosure provides an air conditioning system 1, including a refrigerant circulation loop. The refrigerant circulation loop includes a compressor 20, an evaporator tube assembly 10, an outdoor electronic expansion valve 30, and a condenser 40 connected in sequence by pipes.

[0048] In the aforementioned air conditioning system, the compressor compresses the gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant. The gaseous refrigerant is then transported to the condenser via a four-way valve for cooling, transforming it into a medium-temperature, high-pressure liquid refrigerant. After being throttled and depressurized by the outdoor electronic expansion valve, it forms a low-temperature, low-pressure gas-liquid mixture. This gas-liquid mixture vaporizes into gaseous refrigerant as it passes through the evaporator tube assembly and returns to the compressor to continue the refrigerant cycle and achieve refrigeration.

[0049] Combination Figure 2 As shown, the evaporator tube assembly 10 includes a first tube 101, a second tube 102, a first dehumidification valve 105, a first control valve 106, a fifth control valve 107, a sixth control valve 108, a third control valve 109, a third tube 103, a second dehumidification valve 110, a fourth tube 104, a second control valve 111, and a fourth control valve 112.

[0050] The first pipeline 101 is equipped with the first heat exchange unit 1011.

[0051] The second pipeline 102 is connected in parallel with the first pipeline 101, and the parallel connection end is the pipeline input end IN of the evaporator tube group 10. The second pipeline 102 is configured with the second heat exchange unit 1021.

[0052] The first dehumidification valve 105 is installed at the common output end of the first pipeline 101 and the second pipeline 102.

[0053] The first control valve 106 is connected in series with the first dehumidification valve 105.

[0054] The fifth control valve 107 is connected at one end to the inlet IN of the evaporator tube group 10.

[0055] The sixth control valve 108 is connected at one end to the inlet IN of the evaporator tube group 10.

[0056] The third control valve 109 has one end connected to the other end of the sixth control valve 108 and the other end of the fifth control valve 107, and the other end connected to the common connection end of the first dehumidification valve 105 and the first control valve 106.

[0057] The third pipeline 103 is connected at one end to the other end of the fifth control valve 107 and at the other end to the open end of the first control valve 106. The third pipeline 103 is equipped with a third heat exchange unit 1031.

[0058] The second dehumidification valve 110 is connected at one end to the open end of the first control valve 106.

[0059] The fourth pipe 104 is connected at one end to the other end of the sixth control valve 108, and at the other end to the pipe output terminal OUT of the evaporator pipe group 10. The fourth pipe 104 is equipped with the fourth heat exchange unit 1041.

[0060] The second control valve 111 is connected at one end to the other end of the second dehumidification valve 110, and at the other end to the tube output terminal OUT of the evaporator tube group 10.

[0061] The fourth control valve 112 is connected at one end to the common connection end of the third control valve 109 and the sixth control valve 108, and at the other end to the common connection end of the second dehumidification valve 110 and the second control valve 111.

[0062] The air conditioning system provided in this embodiment uses two dehumidifying valves and six control valves to controllably heat or dehumidify air in all pipes of the evaporator coil unit. Simultaneously, the number of pipes for heating air and the number of pipes for cooling and dehumidification are dynamically adjusted through the coordinated control of the two dehumidifying valves and six control valves to achieve cooling mode, constant temperature dehumidification mode, or heating and dehumidification mode.

[0063] Optionally, the dehumidification valve is an electronic expansion valve with a throttling function. The dehumidification valve includes a first dehumidification valve and a second dehumidification valve.

[0064] Optionally, the heat exchange areas of the first heat exchange unit 1011, the second heat exchange unit 1021, the third heat exchange unit 1031, and the fourth heat exchange unit 1041 are the same. This helps to improve the accuracy of temperature regulation in constant temperature mode.

[0065] 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.

[0066] 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, applied to the air conditioning system described above, including:

[0067] S01, the processor obtains the indoor temperature and humidity of the indoor space.

[0068] S02, the processor determines the target operating mode based on indoor temperature and humidity.

[0069] In this step, the target operating mode includes cooling mode, constant temperature dehumidification mode, or heating dehumidification mode.

[0070] S03, the processor controls the opening and closing of each dehumidification valve and / or controls the opening and closing of each control valve according to the target operating mode, so that the air conditioning system operates according to the target operating mode.

[0071] 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 adjusts the opening and closing of each dehumidifying valve and / or each control valve to ensure the air conditioning system operates according to the target mode. This disclosure achieves controlled heating or dehumidification of air in all pipes of the evaporator coil assembly through coordinated control of two dehumidifying valves and six control valves. Simultaneously, the number of pipes for heating air and dehumidification is dynamically adjusted through coordinated control of the two dehumidifying valves and six control valves to achieve cooling mode, constant temperature dehumidification mode, or heating dehumidification mode. In summary, this disclosure eliminates the need to control the compressor operating frequency or outdoor fan speed; the target operating mode can be achieved solely through system control of multiple dehumidifying valves and control valves in the evaporator coil assembly of the air conditioning system. This provides a simplified control scheme capable of operating in cooling mode, constant temperature dehumidification mode, or heating dehumidification mode.

[0072] Optionally, the processor controls the opening and closing of each dehumidification valve and / or controls the opening and closing of each control valve, including:

[0073] When the target operating mode indicates the cooling mode, the processor controls the first and second dehumidification valves to be fully open, and controls the first, second, fifth, and sixth control valves to be open, while controlling the third and fourth control valves to be closed, so that the refrigerant flows in parallel in different pipelines to achieve cooling.

[0074] Thus, when the target operating mode indicates cooling mode, this embodiment controls the first and second dehumidification valves to be fully open. When either the dehumidification valve or the control valve is fully open, the dehumidification valve has no throttling effect on the refrigerant, and the control valve has no throttling effect on the refrigerant. Simultaneously, this embodiment controls the first, second, fifth, and sixth control valves to be open, and controls the third and fourth control valves to be closed. At this time, the refrigerant flowing into the evaporator pipe assembly can flow in parallel within the four pipes, and each of the four pipes is equipped with a standard evaporator. This achieves the desired cooling effect.

[0075] Optionally, the processor controls the opening and closing of each dehumidification valve and / or the opening and closing of each control valve according to the target operating mode, including:

[0076] When the target operating mode indicates constant temperature and dehumidification mode, the processor controls the second dehumidification valve to be fully open, and controls the second and third control valves to be open, while controlling other control valves to be closed, and controls the opening degree of the first dehumidification valve, so that after the refrigerant flows through the first and second heat exchange units to heat the air and after the refrigerant flows through the third and fourth heat exchange units to cool and dehumidify the air, the heated air and the cooled and dehumidified air are mixed at the air outlet of the evaporator tube group and kept at a constant temperature.

[0077] Thus, when the target operating mode indicates constant temperature dehumidification, this embodiment controls the second dehumidification valve to be fully open, and controls the second and third control valves to be open, while controlling other control valves to be closed, and controlling the first dehumidification valve to be open. At this time, the refrigerant flows through the first and second heat exchange units, condenses and releases heat, thereby heating the air. Afterwards, the refrigerant flows through the third control valve into the third and fourth heat exchange units, where it evaporates, absorbs heat, and dehumidifies, achieving air cooling and dehumidification. The heated air and the cooled and dehumidified air mix at the outlet of the evaporator tube assembly to maintain a constant temperature. This achieves the effect of constant temperature dehumidification.

[0078] Optionally, the processor controls the opening and closing of each dehumidification valve and / or the opening and closing of each control valve according to the target operating mode, including:

[0079] When the target operating mode indicates a heating and dehumidification mode, the processor controls the first dehumidification valve to be fully open, and controls the first control valve, the fourth control valve, and the fifth control valve to be open, and controls the other control valves to be closed, and controls the opening degree of the second dehumidification valve, so that the refrigerant flows through the first heat exchange unit, the second heat exchange unit, and the third heat exchange unit to heat the air, and the refrigerant flows through the fourth heat exchange unit to cool and dehumidify the air. The heated air and the cooled and dehumidified air mix at the air outlet of the evaporator tube group and are then heated.

[0080] Thus, when the target operating mode indicates a heating and dehumidification mode, this embodiment controls the first dehumidification valve to be fully open, and controls the first, fourth, and fifth control valves to be open, while controlling other control valves to be closed, and controlling the second dehumidification valve to be open. At this time, the refrigerant flows through the first, second, and third heat exchange units, condensing and releasing heat to heat the air. Afterward, the refrigerant flows through the fourth control valve into the fourth heat exchange unit for evaporation and heat absorption, achieving air cooling and dehumidification. Since three heat exchange units heat the air through heat exchange with the refrigerant, while one heat exchange unit cools and dehumidifies the air through heat exchange with the refrigerant, the heated air and the cooled and dehumidified air mix at the outlet of the evaporator tube assembly, resulting in an increased temperature and achieving the effect of heating and dehumidification.

[0081] It should be noted that, based on the valve control methods in the constant temperature dehumidification mode and the heating dehumidification mode, it can be seen that, in this embodiment, with four pipelines configured simultaneously, each with its own heat exchange unit, the heat exchange area of ​​the heat exchange unit for heating the air and the heat exchange area for cooling and dehumidifying the air can be dynamically controlled by adjusting the opening and closing of the dehumidification valve and / or control valve. This achieves humidity and temperature regulation of the mixed air, thereby realizing either constant temperature dehumidification or heating dehumidification mode. Compared with controlling the compressor operating frequency and outdoor fan speed, the above control method is simpler and more controllable.

[0082] Optionally, combined Figure 4 As shown, the processor controls the opening and closing of each dehumidification valve and / or controls the opening and closing of each control valve according to the target operating mode, including:

[0083] S11, when the target operating mode indicates constant temperature and dehumidification mode, the processor controls the outdoor electronic expansion valve to be fully open so that the refrigerant flows to the evaporator tube group without throttling.

[0084] S12, the processor controls the second dehumidification valve to be fully open, and controls the second and third control valves to be open, and controls other control valves to be closed, and controls the opening degree of the first dehumidification valve, so that after the refrigerant flows through the first and second heat exchange units to heat the air and after the refrigerant flows through the third and fourth heat exchange units to cool and dehumidify the air, the heated air and the cooled and dehumidified air are mixed at the air outlet of the evaporator tube group and kept at a constant temperature.

[0085] S13, when the target operating mode indicates heating and dehumidification mode, the processor controls the outdoor electronic expansion valve to be fully open so that the refrigerant flows to the evaporator tube group without throttling.

[0086] S14, the processor controls the first dehumidification valve to be fully open, and controls the first control valve, the fourth control valve, and the fifth control valve to be open, and controls the other control valves to be closed, and controls the opening degree of the second dehumidification valve, so that the refrigerant flows through the first heat exchange unit, the second heat exchange unit, and the third heat exchange unit to heat the air, and the refrigerant flows through the fourth heat exchange unit to cool and dehumidify the air. The heated air and the cooled and dehumidified air mix at the air outlet of the evaporator tube group and then rise in temperature.

[0087] Thus, when the target operating mode is determined to be constant temperature dehumidification mode or heating dehumidification mode, this embodiment first controls the outdoor electronic expansion valve to be fully open so that the refrigerant flows unrestricted from the outdoor unit to the indoor evaporator coil assembly. Then, by adjusting the opening and closing of the dehumidification valve and / or control valve, the heat exchange area of ​​the heat exchange unit that achieves air heating and the heat exchange area of ​​the heat exchange unit that achieves air cooling and dehumidification are dynamically controlled, thereby achieving humidity and temperature regulation of the mixed air, and thus realizing constant temperature dehumidification or heating dehumidification mode.

[0088] 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 valve's upper opening threshold, and the valve includes a dehumidifying valve or a control valve. The control valve includes a first control valve, a second control valve, a third control valve, a fourth control valve, a fifth control valve, or a sixth control valve.

[0089] In this way, by controlling the opening of the dehumidification valve or control valve, the dehumidification valve or control valve can be opened according to the opening threshold, thereby achieving the effect of throttling and reducing pressure.

[0090] 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.

[0091] Optionally, the processor determines the target operating mode based on indoor temperature and humidity, including:

[0092] When the indoor temperature exceeds the upper temperature threshold, the processor determines the target operating mode as cooling mode.

[0093] 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.

[0094] 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.

[0095] The temperature threshold range is represented by (lower temperature threshold and upper temperature threshold).

[0096] 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.

[0097] 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.

[0098] Combination Figure 5 As shown, this embodiment of the disclosure provides a control device 200 for an air conditioning system, including a data acquisition module 51, a mode determination module 52, and an operation module 53. The data acquisition module 51 is configured to acquire the indoor temperature and indoor humidity of the indoor space. The mode determination module 52 is configured to determine a target operating mode based on the indoor temperature and indoor humidity; the operation module 53 is configured to control the opening and closing of each dehumidification valve and / or control the opening and closing of each control valve according to the target operating mode, so that the air conditioning system operates according to the target operating mode.

[0099] The control device 200 for an air conditioning system provided in this disclosure embodiment controls two dehumidification valves and six control valves in a coordinated manner to controllably heat or dehumidify all pipes of the evaporator coil assembly. Simultaneously, through the coordinated control of the two dehumidification valves and six control valves, the number of pipes for heating air and for cooling / dehumidifying is dynamically adjusted to achieve a cooling mode, a constant temperature dehumidification mode, or a heating / dehumidification mode. In summary, this disclosure embodiment eliminates the need to control the compressor operating frequency or the outdoor fan speed; the target operating mode can be achieved solely through system control of multiple dehumidification valves and control valves in the evaporator coil assembly of the air conditioning system. This provides a simplified control scheme capable of operating in a cooling mode, a constant temperature dehumidification mode, or a heating / dehumidification mode.

[0100] Combination Figure 6 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] Combination Figure 1As shown, this disclosure provides an air conditioning system 1, including an evaporator tube assembly and the aforementioned control device 70 (200) for the air conditioning system. The control device 70 (200) for the air conditioning system is installed in the evaporator tube assembly. The installation relationship described herein is not limited to placement inside the evaporator tube 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 (200) for the air conditioning system can be adapted to suitable evaporator tube assemblies to achieve other feasible embodiments.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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. An air conditioning system, comprising an evaporator tube assembly, characterized in that, The evaporator tube assembly includes: The first pipeline is equipped with the first heat exchange unit; The second pipeline is connected in parallel with the first pipeline, and the parallel connection end is the pipeline input end of the evaporator tube group, and a second heat exchange unit is configured thereon; The first dehumidification valve is installed at the common output end of the first and second pipelines; The first control valve is connected in series with the first dehumidification valve; The fifth control valve is connected at one end to the inlet end of the evaporator tube assembly; The sixth control valve is connected at one end to the inlet end of the evaporator tube assembly; The third control valve has one end connected to the other end of the sixth control valve and the other end of the fifth control valve, and the other end connected to the common connection end of the first dehumidification valve and the first control valve. The third pipeline is connected at one end to the other end of the fifth control valve and at the other end to the open end of the first control valve, and is configured with the third heat exchange unit. The second dehumidification valve is connected at one end to the open end of the first control valve; The fourth pipeline is connected at one end to the other end of the sixth control valve, and at the other end to the tube output end of the evaporator tube group, where the fourth heat exchange unit is configured. The second control valve is connected at one end to the other end of the second dehumidification valve and at the other end to the tube output end of the evaporator tube group. The fourth control valve is connected at one end to the common connection terminal of the third and sixth control valves, and at the other end to the common connection terminal of the second dehumidification valve and the second control valve.

2. The air conditioning system according to claim 1, characterized in that, The dehumidification valve is an electronic expansion valve with a throttling function; wherein, the dehumidification valve includes a first dehumidification valve and a second dehumidification valve.

3. A control method for an air conditioning system, characterized in that, Applied to the air conditioning system as described in claim 1 or 2, 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 the opening and closing of each control valve so that the air conditioning system operates in accordance with the target operating mode.

4. The method according to claim 3, characterized in that, Based on the target operating mode, control the opening and closing of each dehumidification valve and / or control the opening and closing of each control valve, including: When the target operating mode indicates the cooling mode, the first and second dehumidification valves are fully opened, and the first, second, fifth, and sixth control valves are all opened, while the third and fourth control valves are closed, so that the refrigerant flows in parallel in different pipelines to achieve cooling.

5. The method according to claim 3, characterized in that, Based on the target operating mode, control the opening and closing of each dehumidification valve and / or control the opening and closing of each control valve, including: When the target operating mode indicates constant temperature and dehumidification mode, the second dehumidification valve is fully opened, and the second and third control valves are opened, while other control valves are closed. The opening degree of the first dehumidification valve is also controlled so that after the refrigerant flows through the first and second heat exchange units to heat the air and the refrigerant flows through the third and fourth heat exchange units to cool and dehumidify the air, the heated air and the cooled and dehumidified air are mixed at the air outlet of the evaporator tube group and kept at a constant temperature.

6. The method according to claim 3, characterized in that, Based on the target operating mode, control the opening and closing of each dehumidification valve and / or control the opening and closing of each control valve, including: When the target operating mode indicates a heating and dehumidification mode, the first dehumidification valve is fully opened, and the first, fourth, and fifth control valves are opened, while other control valves are closed. The opening degree of the second dehumidification valve is also controlled so that the refrigerant flows through the first, second, and third heat exchange units to heat the air, and the refrigerant flows through the fourth heat exchange unit to cool and dehumidify the air. The heated air and the cooled and dehumidified air mix at the outlet of the evaporator tube group and are then heated.

7. The method according to claim 5 or 6, characterized in that, The outdoor electronic expansion valve is connected to the evaporator manifold via piping, and also includes: After the target operating mode indicates constant temperature dehumidification mode or heating dehumidification mode, the outdoor electronic expansion valve is fully opened to prevent refrigerant from flowing to the evaporator tube assembly without throttling.

8. A control device for an air conditioning system, characterized in that, include: The data acquisition module is configured to acquire the indoor temperature and humidity of the indoor space. The mode determination module is configured to determine the target operating mode based on indoor temperature and indoor humidity; The operation module is configured to control the opening and closing of each dehumidification valve and / or control the opening and closing of each control valve according to the target operating mode, so that the air conditioning system operates in accordance with the target operating mode.

9. 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 the control method for an air conditioning system as described in any one of claims 3 to 7 when running the program instructions.

10. An air conditioning system, characterized in that, include: Evaporator tube assembly; The control device for an air conditioning system as described in claim 8 or 9 is installed on the evaporator tube assembly.

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