Operation control method, device and air conditioning system

Abstract

The present invention discloses an operation control method, device and air-conditioning system. The air-conditioning system includes an outdoor unit, multiple indoor units and multiple control devices corresponding to the multiple indoor units. The control devices are used to control the on-off of the refrigerant flow path between the corresponding indoor units and the outdoor units. The method includes: when the air-conditioning system is running, judging the operation state of the air-conditioning system; when the air-conditioning system is in a heating state, determining the on-state of each indoor unit; when it is determined that at least one indoor unit is in a shutdown state, obtaining the current outdoor ambient temperature and the system operation parameters representing the high-pressure pressure on the high-pressure side of the system; and controlling the on-off of the control device corresponding to the shutdown indoor unit according to the outdoor ambient temperature and the system operation parameters. The present invention uses the control device to control the collected outer ring temperature and the system operation parameters that can reflect the high-pressure pressure on the high-pressure side of the system in a linked manner, which can not only ensure the heating effect when the outdoor temperature is low, but also ensure the normal operation of the unit when the outdoor temperature is high.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an operation control method, device and air conditioning system. Background Art

[0002] As people's living standards continue to improve, air conditioning products are becoming increasingly popular, and users' expectations for air conditioning are also increasing. Due to their small footprint, household multi-split units are becoming increasingly popular in homes and have also been widely adopted in ultra-low temperature regions such as North America and Northern Europe.

[0003] Due to the characteristics of household multi-split systems, when partially powered on, the refrigerant first flows through the indoor unit and then into the expansion valve. This makes it impossible to shut off the refrigerant flow to the idle indoor unit via the expansion valve. The current solution is to set the electronic expansion valve to a relatively small opening, typically 40-60°, to allow refrigerant to circulate in the idle indoor unit and prevent refrigerant accumulation.

[0004] However, during ultra-low temperature heating operation, to achieve a higher exhaust temperature to meet indoor heating needs, the operating units' openings are also smaller, slightly larger than those of the shut-down units. At this time, while some indoor units are operating, more refrigerant enters the shut-down units, resulting in insufficient refrigerant in the operating units. This small difference in expansion valve opening between the operating and shut-down units causes a significant amount of heat absorbed from the outside air to be lost in the shut-down units, preventing the heating needs of the remaining operating indoor units from being effectively met.

[0005] Related technology: A solenoid valve controlled by the controller of the air-conditioning system is respectively provided on the low-pressure pipeline of each indoor unit of a one-to-many air-conditioning system. The heating operation control method includes: the air-conditioning system starts the heating mode; the controller detects whether each indoor unit is in the on state. If not, the controller issues a command to close the solenoid valve corresponding to the indoor unit in the non-on state. By controlling the closure of the solenoid valve, the refrigerant is prevented from carrying heat into the indoor unit that is not turned on, thereby increasing the heating capacity of the running indoor unit. However, under this solution, the closure of the solenoid valve will cause the refrigerant to accumulate in the indoor unit that is not turned on, causing the high-pressure pressure of the system to rise. When the outdoor temperature is slightly higher, especially when the outdoor temperature is close to the overload condition, when only the smallest indoor unit is turned on, the high-pressure protection is easily triggered, affecting the normal use of the unit. This situation makes it difficult to take into account both household multi-split ultra-low temperature models and models in ordinary areas. Summary of the Invention

[0006] In view of this, the present invention discloses an operation control method, device and air-conditioning system to solve the problem that existing multi-split units used in ultra-low temperature zones are prone to triggering high-voltage protection, affecting the normal use of the units.

[0007] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions:

[0008] A first aspect of the present invention discloses an operation control method for an air conditioning system, the air conditioning system comprising an outdoor unit, a plurality of indoor units, and a plurality of control devices provided in a one-to-one correspondence with the plurality of indoor units, the control devices being configured to control the on / off of a refrigerant flow path between the corresponding indoor units and the outdoor unit, the method comprising:

[0009] When the air-conditioning system is running, determining the operating status of the air-conditioning system;

[0010] When the air conditioning system is in heating state, determine the open state of each indoor unit;

[0011] When it is determined that at least one indoor unit is in a shutdown state, obtaining a current outdoor ambient temperature and a system operating parameter representing a high-pressure pressure on a high-pressure side of the system;

[0012] The opening and closing of the control device corresponding to the shut-down indoor unit is controlled according to the outdoor ambient temperature and the system operating parameters representing the high-pressure pressure on the high-pressure side of the system.

[0013] Further optionally, the system operating parameter characterizing the high-pressure pressure on the high-pressure side of the system is the inner pipe temperature of each started internal unit.

[0014] Further optionally, the opening and closing of the control device corresponding to the stopped indoor unit is controlled according to the outdoor ambient temperature and the system operating parameters representing the high pressure on the high-pressure side of the system, and for each stopped indoor unit, the control includes:

[0015] Determine the outer ring temperature range of the outdoor ambient temperature;

[0016] When the outdoor ambient temperature is less than or equal to a first preset temperature, turning off the corresponding control device;

[0017] When the outdoor ambient temperature is greater than or equal to a second preset temperature, turning on the corresponding control device;

[0018] When the outdoor ambient temperature is greater than the first preset temperature and less than the second preset temperature, the opening and closing of the control devices corresponding to the stopped indoor units are controlled according to the inner pipe temperatures of the started indoor units.

[0019] Further optionally, controlling the opening and closing of the control device corresponding to the stopped indoor unit according to the inner tube temperature of each started indoor unit includes:

[0020] Process the inner tube temperature of each powered-on internal unit to obtain a reference inner tube temperature;

[0021] Determine the inner tube temperature range of the reference inner tube temperature;

[0022] Based on different inner tube temperature ranges, the control device is controlled differently.

[0023] Further optionally, performing different controls on the control device based on different inner tube temperature ranges includes:

[0024] When the reference inner tube temperature is less than or equal to a third preset temperature, closing the control device;

[0025] When the reference inner tube temperature is greater than or equal to a fourth preset temperature, turning on the control device;

[0026] When the reference inner tube temperature is greater than the third preset temperature and less than the fourth preset temperature, the current open state of the control device is maintained unchanged.

[0027] Further optionally, the reference inner tube temperature is the maximum inner tube temperature or the average inner tube temperature among the inner tube temperatures of each started inner machine.

[0028] Further optionally, the method further includes: for each powered-on indoor unit, turning on its corresponding control device.

[0029] Further optionally, the method also includes: when the air-conditioning system is in a non-heating state, turning on the control devices corresponding to each indoor unit.

[0030] The second aspect of the present invention discloses an operation control device, which includes one or more processors and a non-temporary computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement the method according to any one of the first aspects.

[0031] The third aspect of the present invention discloses an air-conditioning system, which includes an outdoor unit, multiple indoor units and multiple control devices arranged in a one-to-one correspondence with the multiple indoor units. The control device is used to control the on-off of the refrigerant flow path between the corresponding indoor unit and the outdoor unit. The method of any one of the first aspects, or the device including the second aspect.

[0032] Further optionally, the control device includes an installation box and an air inlet connecting pipe, a solenoid valve, and an air outlet connecting pipe arranged in the installation box and connected in sequence, at least a portion of an air inlet end of the air inlet connecting pipe is arranged outside the installation box, and at least a portion of an air outlet end of the air outlet connecting pipe is arranged outside the installation box, wherein:

[0033] The air inlet end of the air inlet connecting pipe is provided with a first connecting structure, and the air outlet end of the air outlet connecting pipe is provided with a second connecting structure. The control device is connected to the air pipe of the connecting pipe between the indoor unit and the outdoor unit through the first connecting structure and the second connecting structure.

[0034] The solenoid valve includes a solenoid valve body and a solenoid valve coil. When the solenoid valve coil is energized, the solenoid valve body is turned on. When the solenoid valve is not energized, the solenoid valve body is turned off.

[0035] Beneficial Effects: The present invention provides an external control device for a multi-split unit. By linking the control device with the collected external loop temperature and system operating parameters reflecting the high-pressure pressure on the high-pressure side of the system, the device can ensure heating effectiveness when outdoor temperatures are low while also ensuring normal operation of the unit when outdoor temperatures are high. This significantly expands the unit's operating temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the accompanying drawings. The drawings described below are only some embodiments disclosed in the present invention. It is obvious to a person skilled in the art that other drawings can be derived from these drawings without inventive effort.

[0037] Figure 1 A structural diagram of an air-conditioning system according to an embodiment of the present invention is exemplarily shown.

[0038] Figure 2 The flowchart of the operation control method according to an embodiment of the present invention is exemplarily shown.

[0039] Figure 3 The flowchart of the operation control method according to an embodiment of the present invention is exemplarily shown.

[0040] Figure 4 A schematic structural diagram of a control device according to an embodiment of the present invention is exemplarily shown.

[0041] Among them: 1-solenoid valve body, 2-solenoid valve coil, 3-inlet connecting pipe, 4-pipe nut, 5-outlet connecting pipe, 6-pipe joint, 7-installation box. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0043] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. "A plurality" generally includes at least two, but does not exclude the inclusion of at least one.

[0044] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0045] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0046] In order to solve the problem that the existing multi-split units used in ultra-low temperature areas are prone to triggering high-voltage protection, affecting the normal use of the unit. The first embodiment of the present invention provides an operation control method for an air-conditioning system, an outdoor unit of the air-conditioning system, multiple indoor units and multiple control devices corresponding to the multiple indoor units, the control device is used to control the on-off of the refrigerant flow path between the corresponding indoor unit and the outdoor unit, combined with Figure 2 , the method includes S1 to S4, wherein:

[0047] S1, when the air-conditioning system is running, determining the operating status of the air-conditioning system;

[0048] S2, when the air conditioning system is in heating mode, determining the power-on status of each indoor unit;

[0049] S3, when it is determined that at least one indoor unit is in a shutdown state, obtaining the current outdoor ambient temperature and a system operating parameter representing the high pressure pressure on the high pressure side of the system;

[0050] S4, controlling the opening and closing of the control device corresponding to the stopped indoor unit according to the outdoor ambient temperature and the system operating parameter representing the high-pressure pressure on the high-pressure side of the system.

[0051] The ultra-low temperature zone involved in the embodiment of the present invention is a general term, which can be applied to areas with temperatures of -15°C and below, and is not limited to North America and Northern Europe.

[0052] This embodiment provides an external control device for a multi-split air conditioner. The control device is installed on the air pipe connecting the outdoor unit and the indoor unit. A corresponding number of control devices are provided according to the number of indoor units matched with the outdoor unit, and they correspond one-to-one with the indoor units. Each control device is connected to the air pipe connecting the indoor and outdoor units when the air conditioner is installed according to environmental needs. When the whole unit is in heating operation, the control device is linked with the collected outer ring temperature and the system operating parameters representing the high-pressure pressure on the high-pressure side of the system to ensure the heating effect when the outdoor temperature is low, while ensuring the normal operation of the unit when the outdoor temperature is high.

[0053] Combine Figure 1 The air-conditioning system includes an outdoor unit and multiple indoor units, preferably two indoor units. A control device A is provided between heat exchanger A and the outdoor unit connecting pipe, and a control device B is provided between heat exchanger B and the outdoor unit connecting pipe. The outdoor unit includes a compressor, a four-way valve, an outdoor heat exchanger, and electronic expansion valves A and B. During cooling, the refrigerant first passes through the electronic expansion valve and then enters the indoor unit. The flow of refrigerant to the corresponding indoor unit can be cut off by the electronic expansion valve. However, during heating, the four-way valve is reversed, and the refrigerant first passes through the indoor unit and then enters the electronic expansion valve. At this time, even if the electronic expansion valve is closed, the refrigerant will enter the indoor unit, so an additional control device mentioned above is added at the front end of the indoor unit. When necessary, the control device can be used to cut off the refrigerant from entering the corresponding indoor unit.

[0054] After startup, the entire unit's operating mode is first checked. If the unit is in heating mode, the operating status of each indoor unit is then determined. If an indoor unit is detected to be operating, the control device is also turned on and controlled according to normal operation. If an indoor unit is detected to be in shutdown mode (remote shutdown, temperature point shutdown, etc.), the system's high-pressure pressure is determined by combining the outer ring temperature and system operating parameters such as the inner pipe temperature, which represent the high-pressure pressure on the high-pressure side of the system. The corresponding control device is then turned on and off.

[0055] Specifically, when the whole unit is in heating operation and the outdoor ambient temperature is low, the control device is used to cut off the refrigerant flow to the stopped indoor unit, reducing the loss of heat from the outdoor unit to the stopped indoor unit, ensuring that the indoor unit in use has enough refrigerant to meet the heating demand. At the same time, when the high-pressure pressure of the heating system is too high, the control device is turned on to reduce the high-pressure pressure of the system to avoid a protective shutdown caused by excessive pressure. This effectively solves the problem that existing multi-split units used in ultra-low temperature zones are prone to triggering high-pressure protection, affecting the normal use of the unit. Multi-split units in ordinary temperature zones can be used in ultra-low temperature areas without changing the original unit, thereby expanding the operating temperature range of the unit.

[0056] It will be appreciated that system operating parameters representing the high-pressure pressure on the high-pressure side of the system include, but are not limited to, the inner tube temperature of each active internal unit. In this embodiment, the inner tube temperature of each active internal unit is preferred. The inner tube temperature of each active internal unit can intuitively and accurately reflect the system high-pressure pressure, making this method more reliable.

[0057] Further optionally, the control device is preferably a solenoid valve. In step S4, the opening and closing of the control device corresponding to the stopped indoor unit is controlled according to the outdoor ambient temperature and the system operating parameter representing the high-pressure pressure on the high-pressure side of the system. For each stopped indoor unit, steps S41 to S44 are included, wherein:

[0058] S41, determining the outer ring temperature range of the outdoor ambient temperature;

[0059] S42, when the outdoor ambient temperature is less than or equal to a first preset temperature, shutting down the corresponding control device;

[0060] Specifically, combined Figure 3 , when T 外环 When ≤T1, the solenoid valve of the indoor unit in the shutdown state is closed;

[0061] T 外环 When T1 is ≤, the outdoor ambient temperature is low, and the outdoor heat exchange temperature difference is reduced, making it difficult for the system to absorb heat from the outdoor air, resulting in low heating capacity. If the solenoid valve of the stopped indoor unit is opened at this time, since the refrigerant in heating mode passes through the indoor unit before entering the throttling device, a large amount of heat will be lost by the inoperative indoor unit. As a result, only a portion of the heat absorbed by the outdoor unit is supplied to the operating indoor unit, significantly reducing the heating effect. At this time, closing the solenoid valve of the stopped indoor unit cuts off the refrigerant circulation in the inoperative indoor unit, ensuring that all system refrigerant is supplied to the operating indoor unit. This can reduce this loss and improve the heating comfort of the operating indoor unit.

[0062] In addition, since the outdoor ambient temperature is low at this time, the operating high pressure of the whole machine will also be low. After the solenoid valve is closed, the refrigerant will be concentrated in the running indoor unit, which will cause the system high pressure to increase, but it will not trigger the high pressure protection and will not affect the reliable operation of the whole machine.

[0063] T1 is a preset parameter of the program, and its preferred value range is -10 to -5°C. For example, T1 can be -10°C, -9°C, -8°C, -7°C, -6°C, -5°C, etc.

[0064] S43, when the outdoor ambient temperature is greater than or equal to a second preset temperature, turning on the control device;

[0065] Specifically, combined Figure 3 , when T 外环 When ≥T2, the solenoid valve of the indoor unit in the shutdown state is opened;

[0066] T 外环 When the outdoor ambient temperature is higher than T2, the outdoor temperature difference increases, and heat is easily absorbed from the outdoor air. In addition, the heating demand is not very high at this time, but the pressure will be high. If the solenoid valve is closed at this time, the heat exchanger area of ​​the indoor heat exchanger will be reduced, which may easily cause the system high pressure to rise to trigger the high pressure protection, affecting the normal use of the unit. In order to ensure stable and reliable operation of the unit, the solenoid valve can be directly opened;

[0067] T2 is a program preset parameter, which can generally be set to above 20°C, for example, T2 can be set to 21°C, 22°C, 23°C or 25°C.

[0068] S44, when the outdoor ambient temperature is greater than the first preset temperature and less than the second preset temperature, controlling the opening and closing of the control devices corresponding to the stopped indoor units according to the inner pipe temperatures of the started indoor units;

[0069] Specifically, combined Figure 3 , when T1<T 外环 When <T2, the opening and closing of the solenoid valve is determined by evaluating the internal pipe temperature.

[0070] Further optionally, in step S44, the opening and closing of the control devices corresponding to the stopped indoor units are controlled according to the inner tube temperatures of the started indoor units, including S441 to S443, wherein:

[0071] S441, processing the inner tube temperature of each powered-on indoor unit to obtain a reference inner tube temperature;

[0072] S442, determining an inner tube temperature range of a reference inner tube temperature;

[0073] S443, performing different controls on the control device based on different inner tube temperature ranges;

[0074] The internal tube temperatures of all running internal units are collected and calculated to obtain a reference internal tube temperature. This temperature is then compared with the program's preset value to determine the internal tube temperature range. Optionally, the reference internal tube temperature can be the maximum or average internal tube temperature of all running internal units, or a value obtained through other calculations.

[0075] Further optionally, step S443 is divided into the following three cases:

[0076] A. When the reference inner tube temperature is less than or equal to the third preset temperature, the control device is turned off;

[0077] Combine Figure 3 If the maximum pipe temperature T 内管max ≤T3, the solenoid valve is closed.

[0078] When the maximum pipe temperature of each running indoor unit is T 内管max When T3 is ≤, the system high pressure is not high. Closing the solenoid valve at this time will not cause the system pressure to rise to the point of triggering the high pressure protection. Closing the solenoid valve can allow all the refrigerant to flow into the operating indoor unit, improving the thermal comfort of the operating indoor unit.

[0079] T3 is the program preset value. Generally, T3 can be set between 45 and 50°C, such as 45°C, 47°C, 49°C or 50°C.

[0080] In addition: You can also use the average pipe temperature of each running internal unit to determine whether there is enough pressure margin to open the solenoid valve.

[0081] B. when the reference inner tube temperature is greater than or equal to a fourth preset temperature, turning on the control device;

[0082] Combine Figure 3 If the maximum pipe temperature T 内管max ≥T4, the solenoid valve is opened.

[0083] At this time, the system pressure is high, and closing the solenoid valve can easily trigger the high-pressure protection due to the reduced area of ​​the indoor evaporator. To ensure reliable and stable operation, the solenoid valve opens to relieve pressure, allowing part of the refrigerant to flow to the inoperative indoor unit, ensuring normal and stable operation of the unit.

[0084] T4 is the program preset value. Generally, T4 can be set between 53 and 58°C, such as 53°C, 55°C, 57°C, 58°C, etc.

[0085] C. When the reference inner tube temperature is greater than the third preset temperature and less than the fourth preset temperature, the current open state of the control device is maintained unchanged;

[0086] Combine Figure 3 If the maximum temperature of the pipe in the running unit is T3<T 内管max When the temperature is less than T4, the solenoid valve maintains its current state without any processing. When the pipe temperature is between T3 and T4, the solenoid valve maintains its current state to prevent the solenoid valve from opening frequently and causing fluctuations in heating performance.

[0087] Each indoor unit has its own corresponding control device, which can be controlled separately. If the system pressure is detected to be too high (the pipe temperature is too high), all control devices are preferably activated together for shutting down the indoor unit, that is, cut off at the same time.

[0088] The method provided in this embodiment reduces heat loss in idle indoor units by closing the solenoid valves of inactive indoor units during heating operation when the outer ring temperature is low and the pipe temperatures of all active indoor units are low, ensuring that the active indoor units have sufficient refrigerant to meet heating needs. Furthermore, during heating operation when the outdoor temperature is high or the pipe temperatures of active indoor units are high, the solenoid valves of inactive indoor units are opened to reduce the high pressure on the exhaust side, ensuring normal and stable operation of the unit.

[0089] An embodiment of the second aspect of the present invention discloses an operation control device, which includes one or more processors and a non-temporary computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement the method according to any one of the first aspects.

[0090] The third aspect of the present invention discloses an air-conditioning system, which includes an outdoor unit, multiple indoor units and multiple control devices arranged in a one-to-one correspondence with the multiple indoor units. The control device is used to control the on-off of the refrigerant flow path between the corresponding indoor unit and the outdoor unit. The method of any one of the first aspects, or the device including the second aspect.

[0091] Further optional, combined Figure 4 The control device includes a mounting box 7 and an air inlet connecting pipe 3, a solenoid valve and an air outlet connecting pipe 5 which are arranged in the mounting box 7 and connected in sequence. At least part of the air inlet end of the air inlet connecting pipe 3 is arranged outside the mounting box 7, and at least part of the air outlet end of the air outlet connecting pipe 5 is arranged outside the mounting box 7, wherein:

[0092] The air inlet end of the air inlet connecting pipe 3 is provided with a first connecting structure, and the air outlet end of the air outlet connecting pipe 5 is provided with a second connecting structure. The control device is connected to the air pipe of the connecting pipe between the indoor unit and the outdoor unit through the first connecting structure and the second connecting structure;

[0093] The solenoid valve includes a solenoid valve body 1 and a solenoid valve coil 2. When the solenoid valve coil 2 is not energized, the solenoid valve body 1 is turned on. When the solenoid valve coil 2 is energized, the solenoid valve body 1 is turned off.

[0094] Specifically, the solenoid valve body 1 is an electromagnetic two-way valve, which is the core component of the control device and is used to realize the flow or cutoff of the entire flow path; the solenoid valve coil is a control element, which controls the on and off of the electromagnetic two-way valve by the power supply state of the solenoid valve coil; the solenoid valve is preferably normally open. When the electromagnetic coil is not energized, the electromagnetic two-way valve is in a flow state, and when the electromagnetic coil is energized, the electromagnetic two-way valve is in a cutoff state.

[0095] The air inlet connecting pipe 3 is the heating refrigerant inlet of the device, and is threadedly connected to the external unit stop valve through the connecting nut 4. The connecting nut method can also be omitted, and the air inlet connecting pipe can be directly welded to the middle of the connecting pipe; the air outlet connecting pipe 5 is the heating refrigerant outlet of the device, and is threadedly connected to the air pipe through the pipe joint 6. It can also be welded to the middle of the connecting pipe.

[0096] The installation box 7 is used to protect the electromagnetic two-way valve and pipelines from external forces. There can be one installation box 7 for each control device, or multiple control devices of an external unit can be placed in one installation box 7.

[0097] This allows multi-split units in normal temperature zones to be used in ultra-low temperature areas without changing the original units, thus expanding the operating temperature range of the units.

[0098] In different embodiments provided by the present invention, the same parameters, nouns, logic, etc. should be understood as having a unified meaning, and this application does not intentionally repeat the description in each embodiment.

[0099] The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structures, configurations or implementations described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent configurations included within the spirit and scope of the appended claims.

Claims

1. A method for controlling the operation of an air conditioning system, characterized in that: The air conditioning system includes an outdoor unit, multiple indoor units, and multiple control devices corresponding to the multiple indoor units, the control devices are used to control the opening and closing of the refrigerant flow path between the corresponding indoor units and the outdoor unit, and the method includes: When the air-conditioning system is running, determining the operating status of the air-conditioning system; When the air conditioning system is in a heating state, determining the power-on state of each indoor unit; When it is determined that at least one indoor unit is in a shutdown state, obtaining the current outdoor ambient temperature and a system operating parameter representing the high pressure pressure on the high pressure side of the system; Controlling the opening and closing of the control device corresponding to the stopped indoor unit according to the outdoor ambient temperature and the system operating parameter representing the high-pressure pressure on the high-pressure side of the system; Wherein, the system operating parameter representing the high-pressure pressure on the high-pressure side of the system is the inner pipe temperature of each started indoor unit, and the control device corresponding to the stopped indoor unit is controlled to be turned on and off according to the outdoor ambient temperature and the system operating parameter representing the high-pressure pressure on the high-pressure side of the system, and for each stopped indoor unit, the control includes: Determine the outer ring temperature range of the outdoor ambient temperature; When the outdoor ambient temperature is less than or equal to a first preset temperature, turning off the corresponding control device; When the outdoor ambient temperature is greater than or equal to a second preset temperature, turning on the corresponding control device; When the outdoor ambient temperature is greater than a first preset temperature and less than a second preset temperature, the opening and closing of the control device corresponding to the stopped indoor unit is controlled according to the inner pipe temperature of each of the started indoor units.

2. The method according to claim 1, wherein The controlling of the opening and closing of the control device corresponding to the stopped indoor unit according to the inner tube temperature of each of the started indoor units includes: Processing the inner tube temperature of each of the powered-on internal units to obtain a reference inner tube temperature; determining an inner tube temperature interval of the reference inner tube temperature; Based on different inner tube temperature intervals, the control device is controlled differently.

3. The method according to claim 2, wherein The controlling of the control device in different ways based on different inner tube temperature ranges includes: When the reference inner tube temperature is less than or equal to a third preset temperature, turning off the control device; When the reference inner tube temperature is greater than or equal to a fourth preset temperature, turning on the control device; When the reference inner tube temperature is greater than the third preset temperature and less than the fourth preset temperature, the current open state of the control device is maintained unchanged.

4. The method according to claim 3, wherein The reference inner tube temperature is the maximum inner tube temperature or the average inner tube temperature among the inner tube temperatures of the started inner units.

5. The method according to any one of claims 1 to 4, wherein The method further includes: for each powered-on internal unit, turning on a corresponding control device.

6. The method according to claim 5, wherein The method further comprises: When the air-conditioning system is in a non-heating state, the control devices corresponding to the indoor units are all turned on.

7. An operation control device, characterized in that: The method comprises one or more processors and a non-transitory computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are configured to implement the method according to any one of claims 1 to 6.

8. An air conditioning system, characterized in that: The air-conditioning system includes an outdoor unit, multiple indoor units and multiple control devices arranged in a one-to-one correspondence with the multiple indoor units. The control device is used to control the on-off of the refrigerant flow path between the corresponding indoor unit and the outdoor unit. It adopts the method described in any one of claims 1-6, or includes the device described in claim 7.

9. The air conditioning system according to claim 8, wherein: The control device includes an installation box and an air inlet connecting pipe, a solenoid valve, and an air outlet connecting pipe arranged in the installation box and connected in sequence, wherein at least a portion of the air inlet end of the air inlet connecting pipe is arranged outside the installation box, and at least a portion of the air outlet end of the air outlet connecting pipe is arranged outside the installation box, wherein: The air inlet end of the air inlet connecting pipe is provided with a first connecting structure, and the air outlet end of the air outlet connecting pipe is provided with a second connecting structure. The control device is connected to the air pipe of the connecting pipe between the corresponding indoor unit and the outdoor unit through the first connecting structure and the second connecting structure.

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