Air conditioning system and air conditioning system control method

Abstract

According to the air conditioning system and the air conditioning system control method, the air conditioning system comprises a basic circulation module and an air supply module, the basic circulation module comprises a compressor, and the air supply module comprises an air supply unit and a switch unit; an air supply port of the compressor is connected with the air supply unit through the switch unit; wherein the switch unit is used for closing the switch unit when an air supply port of the compressor has an impact risk so as to stop supplying air to the compressor through the air supply unit; and when the air supplementing opening of the compressor does not have the impact risk, the switch unit is turned on, and air supplementing is conducted on the compressor through the air supplementing unit. By arranging the switch unit and closing the switch unit when the air supply port of the compressor has the impact risk, the impact of the air supply pressure on the air supply pipeline can be avoided, that is, the risk that the air supply pipeline is impacted and damaged can be avoided while the air supply function is achieved, and the reliability of the air conditioning system is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of air conditioning, and more particularly to an air conditioning system and an air conditioning system control method. Background Technology

[0002] With the development of HVAC and industrial refrigeration technologies, screw chillers have been widely used in large buildings, data centers, and industrial cooling applications due to their high efficiency, stability, and wide load adjustment capabilities. To improve the COP (Coefficient of Performance) and cooling capacity of the units under low-temperature or high-load conditions, enthalpy boosting technology has been widely integrated into screw compressor systems in recent years.

[0003] However, in actual operation, the gas replenishment and enthalpy enhancement system has a long-overlooked but significant potential risk: periodic pulsations in the gas replenishment pressure. This pulsation stems from the inherent operating characteristics of the screw compressor—its gas replenishment process is not a continuous and stable supply, but rather an intermittent intake behavior strictly synchronized with the rotor's rotation cycle. When the rotor reaches the set gas replenishment angle, the gas replenishment port opens, and medium-pressure gas is drawn into the compression chamber; when the angle exceeds the design position, the gas replenishment port closes. This "on-off" process repeats with each revolution, causing high-frequency periodic fluctuations in the gas pressure in the gas replenishment pipeline, forming pressure pulsations. Over long-term operation, the alternating stress generated by these pulsations can cause fatigue damage in structurally weak areas such as the gas replenishment pipeline, welded joints, and the economizer housing; ultimately leading to malfunctions such as cracking of the gas replenishment pipeline and leakage at the economizer welds. Summary of the Invention

[0004] The main objective of this invention is to propose an air conditioning system and an air conditioning system control method, which aims to solve the problem of pipeline damage caused by the periodic pulsation of the gas replenishment pressure in the existing gas replenishment enthalpy system.

[0005] To achieve the above objectives, the present invention provides an air conditioning system, comprising a basic circulation module and a gas replenishment module. The basic circulation module includes a compressor, and the gas replenishment module includes a gas replenishment unit and a switching unit. The gas replenishment port of the compressor is connected to the gas replenishment unit through the switching unit. The switching unit is used to close the switching unit when there is a risk of impact at the air inlet of the compressor, so as to stop the air supply to the compressor through the air supply unit; and to open the switching unit when there is no risk of impact at the air inlet of the compressor, so as to supply air to the compressor through the air supply unit.

[0006] Optionally, the switching unit includes an electric valve and a buffer chamber; wherein: The first end of the electric valve is connected to the air supply port of the compressor through the buffer chamber, and the second end of the electric valve is connected to the air supply unit.

[0007] Optionally, the basic circulation module further includes an evaporator, a condenser, and a first throttling device; the gas replenishment unit includes a plate heat exchanger and a second throttling device; wherein: The output end of the condenser is connected to the first end of the first side of the plate heat exchanger, and the second end of the second side of the plate heat exchanger is connected to the input end of the condenser through the first throttling device; The output end of the condenser is also connected to the first end of the second side of the plate heat exchanger through the second throttling device, and the second end of the second side of the plate heat exchanger is connected to the switching unit.

[0008] Optionally, the air replenishment unit further includes a solenoid valve; wherein: The first end of the solenoid valve is connected to the second end of the second side of the plate heat exchanger, and the second end of the solenoid valve is connected to the input end of the evaporator through the throttling device.

[0009] Optionally, the air conditioning system further includes a first pressure sensor and a second pressure sensor; wherein: The first pressure sensor is located at the air inlet of the compressor; The second pressure sensor is located at the exhaust port of the compressor.

[0010] To achieve the above objectives, the present invention also provides an air conditioning system control method, which is applied to the air conditioning system described above, and the air conditioning system control method includes: Obtain the operating data of the air conditioning system's compressor; Based on the operating data, determine whether there is a risk of impact at the compressor's air inlet; If there is a risk of impact at the compressor's air supply port, the switching unit is turned off to stop supplying air to the compressor through the air supply unit; If there is no risk of impact at the compressor's air inlet, the switching unit is turned on to supply air to the compressor through the air supply unit.

[0011] Optionally, determining whether there is a risk of impact at the compressor's air inlet based on the operating data includes: The current load change rate of the air conditioning system is determined based on the operating data. Obtain a preset stable load change rate threshold, and determine whether the current load change rate reaches the preset stable load change rate threshold. If the current load change rate reaches the preset stable load change rate threshold, it is determined that there is an impact risk at the compressor's air inlet.

[0012] Optionally, the step of determining whether the current load change rate reaches the preset stable load change rate threshold includes: If the current load change rate is less than the preset stable load change rate threshold, then the current range of the gas supply pressure within the current monitoring time window is determined based on the operating data. Obtain a preset range threshold and determine whether the current range is greater than the preset range threshold; If the current range is greater than the preset range threshold, it is determined that there is an impact risk at the compressor's air inlet. If the current range is less than or equal to the preset range threshold, then it is determined that there is no impact risk at the compressor's air inlet.

[0013] Optionally, the switching unit includes an electric valve, and the shut-off switching unit includes: Obtain the preset adjustment time and the current opening degree of the electric valve; The opening degree of the electric valve is reduced within the preset adjustment time to reduce the opening degree of the electric valve from the current opening degree to the closed opening degree.

[0014] Optionally, the step of shutting off the switch unit to stop supplying gas to the compressor via the gas supply unit includes: Obtain the current discharge pressure and current intake pressure of the compressor; Calculate the pressure difference between the current exhaust pressure and the current intake pressure; Obtain a preset difference threshold and determine whether the pressure difference is less than the preset difference threshold; If the pressure difference is less than the preset difference threshold, the solenoid valve is opened to output the flash vapor from the gas supply unit to the evaporator.

[0015] This invention proposes an air conditioning system and an air conditioning system control method. The air conditioning system includes a basic circulation module and a gas replenishment module. The basic circulation module includes a compressor, and the gas replenishment module includes a gas replenishment unit and a switching unit. The gas replenishment port of the compressor is connected to the gas replenishment unit through the switching unit. The switching unit is used to close when there is a risk of impact at the gas replenishment port of the compressor, thereby stopping gas replenishment to the compressor through the gas replenishment unit; and to open when there is no risk of impact at the gas replenishment port of the compressor, thereby replenishing the compressor through the gas replenishment unit. By setting the switching unit and closing it when there is a risk of impact at the gas replenishment port of the compressor, the impact of gas replenishment pressure on the gas replenishment pipeline can be avoided. Conversely, opening the switching unit when there is no risk of impact at the gas replenishment port of the compressor enables the gas replenishment function. In other words, this application achieves the gas replenishment function while avoiding the risk of damage to the gas replenishment pipeline due to impact, ensuring the reliability of the air conditioning system. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a modular structure diagram of the air conditioning system of the present invention; Figure 2 This is a flowchart of the first embodiment of the air conditioning system control method of the present invention; Figure 3 This is an overall flowchart of the air conditioning system control method of the present invention; Figure 4 This is a schematic diagram of the module structure of the electronic device of the present invention.

[0019] Explanation of icon numbers: Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0021] This invention provides an air conditioning system, see [link to relevant documentation]. Figure 1 , Figure 1 This is a modular structure diagram of the air conditioning system of the present invention; the air conditioning system includes a basic circulation module and a gas replenishment module, the basic circulation module includes a compressor Q, and the gas replenishment module includes a gas replenishment unit and a switching unit; the gas replenishment port of the compressor Q is connected to the gas replenishment unit through the switching unit; wherein: The switching unit is used to close the switching unit when there is a risk of impact at the gas inlet of the compressor Q, so as to stop the gas supply to the compressor Q through the gas supply unit; and to open the switching unit when there is no risk of impact at the gas inlet of the compressor Q, so as to supply gas to the compressor Q through the gas supply unit.

[0022] The basic circulation module is the device structure within the air conditioning system that realizes the basic refrigerant cycle; specifically, the basic circulation module is a refrigerant circulation system composed of compressor Q, condenser C, evaporator Z, and throttling device.

[0023] The specific structure of the basic loop module can be set according to actual needs.

[0024] The gas replenishment module is a device structure used to replenish gas and increase enthalpy for compressor Q in the basic cycle module.

[0025] The gas injection module is used to draw a portion of the high-pressure liquid refrigerant from the main liquid pipe at the outlet of condenser C and inject this portion of refrigerant into the compression chamber of compressor Q to enhance the cooling or heating capacity of the air conditioning system.

[0026] The air replenishment module specifically includes an air replenishment unit and a switching unit; The refrigerant injection unit injects refrigerant through the refrigerant injection port of compressor Q to achieve the refrigerant injection function.

[0027] The switching unit is used to control the connection between the gas supply unit and the gas supply port of compressor Q. When the switching unit is closed, the gas supply port of compressor Q is disconnected from the gas supply unit, and the gas supply unit cannot supply gas to compressor Q. Similarly, the pressure pulsation of compressor Q will not impact the gas supply channel of the gas supply unit. When the switching unit is open, the gas supply unit can supply gas to compressor Q. Similarly, the pressure pulse of compressor Q will impact the gas supply channel of the gas supply unit.

[0028] When there is a risk of impact at the gas supply port of compressor Q, in order to prevent the pressure pulsation of compressor Q from impacting the gas supply channel and causing damage to the gas supply channel, the switching unit is closed to isolate the gas supply port of compressor Q from the gas supply unit, thereby preventing the gas supply channel from being impacted.

[0029] When there is no risk of impact at the gas supply port of compressor Q, the switching unit will be turned on so that the gas supply unit can supply gas to compressor Q to improve refrigeration efficiency.

[0030] Whether there is a risk of impact at the air supply port of compressor Q can be determined by analyzing the specific operating conditions of the air conditioning system.

[0031] For example, the current load change rate of the air conditioning system can be determined based on the operating data; Obtain a preset stable load change rate threshold, and determine whether the current load change rate reaches the preset stable load change rate threshold. If the current load change rate reaches the preset stable load change rate threshold, it is determined that there is an impact risk at the air supply port of the compressor Q.

[0032] The load change rate refers to how quickly the load of an air conditioning system changes over time during operation.

[0033] Specifically, the load change rate is as follows, for air conditioning systems using variable frequency units:

[0034] Where f(J) is the load change rate; Hz(t) is the instantaneous drive frequency of compressor Q, and Hz(t) is a function of time t; Hz is the unit of frequency, equivalent to seconds. - ¹△t indicates the time taken for the change; For air conditioning systems using fixed-frequency units:

[0035] Where I(t) is the instantaneous current of compressor Q, and I(t) is a function of time t; I is the unit of current, equivalent to seconds. - ¹△t indicates the time taken for the change to occur.

[0036] The preset stable load change rate threshold is used to indicate the maximum allowable load change rate threshold of the unit under stable operating conditions; the specific value of the preset stable load change rate threshold can be set based on experience or actual needs.

[0037] If the current load change rate reaches the preset stable load change rate threshold, it is considered that the current load change rate of the air conditioning system has reached the upper limit, and the air conditioning system is considered to be in a state of large fluctuation. For example, when the air conditioning system is first turned on, or when the external water temperature changes drastically, it will cause large fluctuations in the load change rate. In this case, the pressure pulsation of the compressor Q is large, which can easily cause a large impact on the air supply line. Therefore, in this embodiment, when the current load change rate is detected to reach the preset stable load change rate threshold, it is determined that there is an impact risk at the air supply port of the compressor Q, and then the switching unit is closed to avoid the air supply unit being impacted.

[0038] If the current load change rate is less than the preset stable load change rate threshold, it is considered that the current load change rate of the air conditioning system is within the allowable range. Therefore, based on the load change rate, it can be considered that there is no impact risk at the air supply port of compressor Q.

[0039] By monitoring the load change rate, it is possible to accurately determine whether there is an impact risk at the air inlet of compressor Q based on the load change rate.

[0040] For example, if the current load change rate is less than the preset stable load change rate threshold, the current range of the gas supply pressure within the current monitoring time window is determined based on the operating data. Obtain a preset range threshold and determine whether the current range is greater than the preset range threshold; If the current range is greater than the preset range threshold, it is determined that there is an impact risk at the air inlet of the compressor Q; If the current range is less than or equal to the preset range threshold, then it is determined that there is no impact risk at the air inlet of the compressor Q.

[0041] The replenishment pressure is the pressure at the replenishment port of compressor Q.

[0042] The current range is the difference between the maximum and minimum values ​​of the replenishment pressure within the current monitoring time window.

[0043] Understandably, within the current monitoring time window, the larger the current range, the greater the fluctuation of the gas supply pressure; conversely, the smaller the current range, the smaller the fluctuation of the gas supply pressure. Therefore, the fluctuation of the gas supply pressure of compressor Q can be determined based on the current range.

[0044] The specific length of the current monitoring time window can be set based on actual needs.

[0045] Specifically:

[0046] Where L(t) is the current extreme value; P(τ) is the replenishment pressure; τ∈[t] [T,t] represents the current monitoring time window, where t is the current time and T is the length of the current monitoring time window; max indicates the maximum value of the gas replenishment pressure within the current monitoring time window; min indicates the minimum value of the gas replenishment pressure within the current monitoring time window.

[0047] The preset range threshold is used to indicate the maximum range value that will not cause a pressure pulse.

[0048] When the current range is detected to be greater than the preset range threshold, it indicates that the pressure fluctuation at the gas inlet of compressor Q is large, which will cause pressure pulses. Therefore, it is considered that there is a risk of impact at the gas inlet of compressor Q.

[0049] When the current range is detected to be less than or equal to the preset range threshold, it indicates that the pressure fluctuation at the gas inlet of compressor Q is small and will not cause pressure pulses. Therefore, it is considered that there is no impact risk at the gas inlet of compressor Q.

[0050] By determining the range of the gas supply pressure difference of compressor Q, the fluctuation of the gas supply pressure of compressor Q can be clarified, thereby enabling an accurate determination of whether compressor Q has an impact risk.

[0051] This embodiment sets up a switching unit, which is turned off when there is a risk of impact at the air supply port of compressor Q, thereby avoiding the impact of air supply pressure on the air supply pipeline. When there is no risk of impact at the air supply port of compressor Q, the switching unit is turned on to realize the air supply function. That is, this application can realize the air supply function while avoiding the risk of the air supply pipeline being damaged by impact, thus ensuring the reliability of the air conditioning system.

[0052] Furthermore, the switching unit includes an electric valve M and a buffer chamber A; wherein: The first end of the electric valve M is connected to the air supply port of the compressor Q through the buffer chamber A, and the second end of the electric valve M is connected to the air supply unit.

[0053] An electric valve M is an automatic control valve that controls the opening and closing of the valve or adjusts the opening degree through an electric actuator. It is used to specifically realize the connection and shutdown of the gas supply unit and the compressor Q.

[0054] Buffer chamber A is a local volumetric structure specifically designed in a fluid system to absorb or attenuate pressure fluctuations, airflow impacts, and pulsating energy.

[0055] The buffer chamber A is located between the electric valve M and the air supply port of the compressor Q.

[0056] When there is a risk of impact at the air supply port of compressor Q, the electric valve M closes, disconnecting the connection between the air supply unit and the air supply port of compressor Q. At the same time, the buffer chamber A connects with the air supply port of compressor Q. The buffer can absorb the backflow of airflow at the air supply port of compressor Q, thereby reducing the pressure pulse and further preventing the pressure pulse from impacting the air supply channel.

[0057] When there is no risk of impact at the air supply port of compressor Q, the electric valve M opens, and the connection between the air supply unit and the air supply port of compressor Q is established, allowing the air supply unit to supply air to the air supply port of compressor Q.

[0058] In other embodiments, a check valve can be installed in the middle of the gas supply line to prevent high-pressure gas from the compression chamber from flowing back into the gas supply line.

[0059] In other embodiments, a spring structure can be installed on the gas supply line to buffer vibration, thereby further buffering the pressure pulsation at the compressor's gas supply port.

[0060] In this embodiment, by setting an electric valve M and a buffer chamber A, the pressure pulse can be further reduced through the buffer chamber A, thereby further improving the reliability of the air conditioning system, based on the on / off control between the air supply port of the compressor Q and the air supply unit.

[0061] Furthermore, the basic circulation module also includes an evaporator Z, a condenser C, and a first throttling device E1; the gas replenishment unit includes a plate heat exchanger K and a second throttling device E2; wherein: The output end of the condenser C is connected to the first end of the first side of the plate heat exchanger K, and the second end of the second side of the plate heat exchanger K is connected to the input end of the condenser C through the first throttling device E1. The output end of the condenser C is also connected to the first end of the second side of the plate heat exchanger K through the second throttling device E2, and the second end of the second side of the plate heat exchanger K is connected to the switching unit.

[0062] Evaporator Z is one of the core heat exchange components in a refrigeration or heat pump system. Its main function is to allow the liquid refrigerant to absorb heat from the medium being cooled and evaporate into a gaseous state under low pressure and low temperature conditions, thereby achieving a cooling effect.

[0063] The condenser C cools and condenses the high-temperature, high-pressure gaseous refrigerant discharged from the compressor Q into a high-pressure liquid or near-saturated liquid, while releasing the heat absorbed by the refrigerant during the cycle to the external environment.

[0064] Throttling devices generate a pressure drop by locally reducing the diameter, thereby reducing the pressure of the refrigerant and limiting its flow. The specific type of throttling device can be set according to actual needs, such as a throttling orifice plate.

[0065] The plate heat exchanger K forms narrow flow channels between adjacent plates. Two fluids, such as two refrigerants, flow in two separate channels and exchange heat through the plates without directly contacting each other.

[0066] During operation, the refrigerant is discharged from the exhaust port of compressor Q and reaches the condenser C for heat exchange. It then splits into two paths. One path passes through the first flow channel of plate heat exchanger K to the first throttling device E1 and then to the evaporator Z for heat exchange. After heat exchange, it returns to the inlet of compressor Q to complete the cycle. The other path passes through the second throttling device E2 to the second flow channel of plate heat exchanger K. The two flow channels exchange heat within the plate heat exchanger. The refrigerant is discharged from the second flow channel and then input to the gas supply port of compressor Q through the switching unit to replenish the gas supply.

[0067] In this embodiment, by setting an evaporator Z, a condenser C, and a first throttling device E1 in the basic circulation module, and setting a plate heat exchanger K and a second throttling device E2 in the gas replenishment unit, the topology of an air conditioning system with gas replenishment function is constructed.

[0068] Furthermore, the air replenishment unit also includes a solenoid valve F; wherein: The first end of the solenoid valve F is connected to the second end of the second side of the plate heat exchanger K, and the second end of the solenoid valve F is connected to the input end of the evaporator Z through the throttling device.

[0069] Because the gas supply unit and the gas supply port of compressor Q have different states of connection and disconnection; when the gas supply unit and the gas supply port of compressor Q are disconnected, the gas supply unit is equivalent to an idle state.

[0070] In this embodiment, a solenoid valve F is installed in the gas supply unit, and the second end of the second side of the plate heat exchanger K is connected to the input end of the evaporator Z through the solenoid valve F. This allows the second side of the plate heat exchanger K to be connected to the input end of the evaporator Z when the gas supply unit is disconnected from the gas supply port of the compressor Q. This allows the flash vapor output from the second side of the plate heat exchanger K to be drawn into the main liquid pipeline, increasing the subcooling and thus improving the cooling efficiency of the air conditioning system.

[0071] When there is a risk of impact at the gas inlet of compressor Q, the switching unit is disconnected, the solenoid valve F is opened, and the flash vapor output from the second side of plate heat exchanger K merges into the main liquid pipeline and combines with the refrigerant output from the first side of plate heat exchanger K. Then, it reaches evaporator Z through the first throttling device E1.

[0072] When there is no risk of impact at the gas inlet of compressor Q, the switching unit is turned on, the solenoid valve F is closed, and the flash vapor output from the second side of plate heat exchanger K is output to the gas inlet of compressor Q through the switching unit to achieve gas replenishment.

[0073] Furthermore, the air conditioning system also includes a first pressure sensor P and a second pressure sensor P; wherein: The first pressure sensor P is located at the air inlet of the compressor Q; The second pressure sensor P is located at the exhaust port of the compressor Q.

[0074] In order to specifically determine whether there is an impact risk at the air inlet of compressor Q, in this embodiment, pressure sensors P are respectively installed at the air inlet and air outlet of compressor Q to detect the air inlet pressure and exhaust pressure of compressor Q, thereby providing accurate parameter references for whether there is an impact risk at the air inlet of compressor Q.

[0075] This invention provides a method for controlling an air conditioning system, referring to... Figure 2 , Figure 2 This is a flowchart of a first embodiment of the air conditioning system control method of the present invention. The air conditioning system control method is applied to the air conditioning system described above, and the method includes the following steps: Step S10: Obtain the operating data of the compressor Q of the air conditioning system; Operating data is used to indicate the operating status of compressor Q; operating data includes compressor Q's intake pressure, replenishment pressure, and discharge pressure.

[0076] The specific data collected can be obtained by setting up corresponding sensors for specific data types.

[0077] Step S20: Determine whether there is an impact risk at the air supply port of the compressor Q based on the operating data; Whether there is a risk of impact at the air supply port of compressor Q can be determined by analyzing the specific operating conditions of the air conditioning system.

[0078] Step S30: If there is a risk of impact at the air supply port of the compressor Q, the switching unit is turned off to stop supplying air to the compressor Q through the air supply unit; When there is a risk of impact at the gas supply port of compressor Q, in order to prevent the pressure pulsation of compressor Q from impacting the gas supply channel and causing damage to the gas supply channel, the switching unit is closed to isolate the gas supply port of compressor Q from the gas supply unit, thereby preventing the gas supply channel from being impacted.

[0079] Step S40: If there is no risk of impact at the air supply port of the compressor Q, then the switching unit is turned on to supply air to the compressor Q through the air supply unit.

[0080] When there is no risk of impact at the gas supply port of compressor Q, the switching unit will be turned on so that the gas supply unit can supply gas to compressor Q to improve refrigeration efficiency.

[0081] This embodiment sets up a switching unit, which is turned off when there is a risk of impact at the air supply port of compressor Q, thereby avoiding the impact of air supply pressure on the air supply pipeline. When there is no risk of impact at the air supply port of compressor Q, the switching unit is turned on to realize the air supply function. That is, this application can realize the air supply function while avoiding the risk of the air supply pipeline being damaged by impact, thus ensuring the reliability of the air conditioning system.

[0082] Furthermore, in the second embodiment of the air conditioning system control method of the present invention based on the first embodiment, step S20 includes the following steps: Step S21: Determine the current load change rate of the air conditioning system based on the operating data; Step S22: Obtain a preset stable load change rate threshold, and determine whether the current load change rate reaches the preset stable load change rate threshold; Step S23: If the current load change rate reaches the preset stable load change rate threshold, it is determined that there is an impact risk at the air supply port of the compressor Q.

[0083] The load change rate refers to how quickly the load of an air conditioning system changes over time during operation.

[0084] Specifically, the load change rate is as follows, for air conditioning systems using variable frequency units:

[0085] Where f(J) is the load change rate; Hz(t) is the instantaneous drive frequency of compressor Q, and Hz(t) is a function of time t; Hz is the unit of frequency, equivalent to seconds. - ¹△t indicates the time taken for the change; For air conditioning systems using fixed-frequency units:

[0086] Where I(t) is the instantaneous current of compressor Q, and I(t) is a function of time t; I is the unit of current, equivalent to seconds. - ¹△t indicates the time taken for the change to occur.

[0087] The preset stable load change rate threshold is used to indicate the maximum allowable load change rate threshold of the unit under stable operating conditions; the specific value of the preset stable load change rate threshold can be set based on experience or actual needs.

[0088] If the current load change rate reaches the preset stable load change rate threshold, it is considered that the current load change rate of the air conditioning system has reached the upper limit, and the air conditioning system is considered to be in a state of large fluctuation. For example, when the air conditioning system is first turned on, or when the external water temperature changes drastically, it will cause large fluctuations in the load change rate. In this case, the pressure pulsation of the compressor Q is large, which can easily cause a large impact on the air supply line. Therefore, in this embodiment, when the current load change rate is detected to reach the preset stable load change rate threshold, it is determined that there is an impact risk at the air supply port of the compressor Q, and then the switching unit is closed to avoid the air supply unit being impacted.

[0089] If the current load change rate is less than the preset stable load change rate threshold, it is considered that the current load change rate of the air conditioning system is within the allowable range. Therefore, based on the load change rate, it can be considered that there is no impact risk at the air supply port of compressor Q.

[0090] In this embodiment, by monitoring the load change rate, it is possible to accurately determine whether there is an impact risk at the air inlet of compressor Q based on the load change rate.

[0091] Furthermore, step S22 is followed by the following step: Step S24: If the current load change rate is less than the preset stable load change rate threshold, then determine the current range of the gas supply pressure within the current monitoring time window based on the operating data. Step S25: Obtain a preset range threshold and determine whether the current range is greater than the preset range threshold; Step S26: If the current range is greater than the preset range threshold, it is determined that there is an impact risk at the air inlet of the compressor Q. Step S25: If the current range is less than or equal to the preset range threshold, then it is determined that there is no impact risk at the air inlet of the compressor Q.

[0092] The replenishment pressure is the pressure at the replenishment port of compressor Q.

[0093] The current range is the difference between the maximum and minimum values ​​of the replenishment pressure within the current monitoring time window.

[0094] Understandably, within the current monitoring time window, the larger the current range, the greater the fluctuation of the gas supply pressure; conversely, the smaller the current range, the smaller the fluctuation of the gas supply pressure. Therefore, the fluctuation of the gas supply pressure of compressor Q can be determined based on the current range.

[0095] The specific length of the current monitoring time window can be set based on actual needs.

[0096] Specifically:

[0097] Where L(t) is the current extreme value; P(τ) is the replenishment pressure; τ∈[t] [T,t] represents the current monitoring time window, where t is the current time and T is the length of the current monitoring time window; max indicates the maximum value of the gas replenishment pressure within the current monitoring time window; min indicates the minimum value of the gas replenishment pressure within the current monitoring time window.

[0098] The preset range threshold is used to indicate the maximum range value that will not cause a pressure pulse.

[0099] When the current range is detected to be greater than the preset range threshold, it indicates that the pressure fluctuation at the gas inlet of compressor Q is large, which will cause pressure pulses. Therefore, it is considered that there is a risk of impact at the gas inlet of compressor Q.

[0100] When the current range is detected to be less than or equal to the preset range threshold, it indicates that the pressure fluctuation at the gas inlet of compressor Q is small and will not cause pressure pulses. Therefore, it is considered that there is no impact risk at the gas inlet of compressor Q.

[0101] In this embodiment, the fluctuation of the gas supply pressure of compressor Q is clarified by determining the range of the gas supply pressure difference of compressor Q, thereby enabling accurate determination of whether compressor Q has an impact risk.

[0102] Furthermore, in the third embodiment of the air conditioning system control method of the present invention based on the first embodiment, the switching unit includes an electric valve M, and step S30 includes the following steps: Step S31: Obtain the preset adjustment time and the current opening degree of the electric valve M; Step S32: Reduce the opening degree of the electric valve M within the preset adjustment time to reduce the opening degree of the electric valve M from the current opening degree to the closed opening degree.

[0103] It is understandable that when the electric valve M changes from fully open to fully closed or from fully closed to fully open in a short period of time, it will cause the pressure in the air supply pipeline to fluctuate, thereby causing a pressure shock and affecting the life of the air supply pipeline.

[0104] In this embodiment, a preset adjustment time is set; the preset adjustment time is the minimum time required for the electric valve M to complete the switching state transition.

[0105] By setting a preset time condition, the electric valve M can be opened or closed slowly within the preset time condition when switching between on and off states. This reduces the dynamic stress generated when the electric valve M switches between on and off, thereby reducing the alternating stress on the gas supply pipeline and avoiding impact on the gas supply pipeline.

[0106] In practical implementation, when it is determined that the electric valve M needs to be opened, the current opening degree of the electric valve M is first obtained, and the adjustment degree between the current opening degree and the target opening degree is determined. For example, if the current opening degree is 20% and the target opening degree is fully open, i.e., 100%, then the opening degree of the electric valve M needs to be increased from 20% to 100% within a preset adjustment time. The specific increase method can be set to increase in a fixed step size. For example, if the fixed step size is set to 10%, then it is necessary to increase the opening degree from 20% to 100% in 8 steps. At this time, the preset adjustment time can be divided by 8 to determine the interval time between each increase.

[0107] For example, if a fixed number of increases is set, such as 5 times, then adjusting the opening from 20% to 100% requires 5 increases at equal intervals, and each increase requires 16% of the opening.

[0108] The closing of the electric valve M can be achieved by analogy with the above-described starting method, and will not be described in detail again.

[0109] In this embodiment, by gradually increasing or decreasing the opening degree of the electric valve M to the required state within a preset adjustment time, the impact caused by excessive movement of the electric valve M is avoided.

[0110] Furthermore, in the fourth embodiment of the air conditioning system control method of the present invention based on the first embodiment of the present invention, step S30 is followed by the following step: Step S50: Obtain the current discharge pressure and current intake pressure of the compressor Q; Step S60: Calculate the pressure difference between the current exhaust pressure and the current intake pressure; Step S70: Obtain a preset difference threshold and determine whether the pressure difference is less than the preset difference threshold; In step S80, if the pressure difference is less than the preset difference threshold, the solenoid valve F is opened to output the flash vapor from the gas supply unit to the evaporator Z.

[0111] Because the gas supply unit and the gas supply port of compressor Q have different states of connection and disconnection; when the gas supply unit and the gas supply port of compressor Q are disconnected, the gas supply unit is equivalent to an idle state.

[0112] In this embodiment, a solenoid valve F is installed in the gas supply unit, and the second end of the second side of the plate heat exchanger K is connected to the input end of the evaporator Z through the solenoid valve F. This allows the second side of the plate heat exchanger K to be connected to the input end of the evaporator Z when the gas supply unit is disconnected from the gas supply port of the compressor Q. This allows the flash vapor output from the second side of the plate heat exchanger K to be drawn into the main liquid pipeline, increasing the subcooling and thus improving the cooling efficiency of the air conditioning system.

[0113] When there is a risk of impact at the gas inlet of compressor Q, the switching unit is disconnected, the solenoid valve F is opened, and the flash vapor output from the second side of plate heat exchanger K merges into the main liquid pipeline and combines with the refrigerant output from the first side of plate heat exchanger K. Then, it reaches evaporator Z through the first throttling device E1.

[0114] When there is no risk of impact at the gas inlet of compressor Q, the switching unit is turned on, the solenoid valve F is closed, and the flash vapor output from the second side of plate heat exchanger K is output to the gas inlet of compressor Q through the switching unit to achieve gas replenishment.

[0115] The pressure difference between the exhaust pressure and the intake pressure reflects the operating intensity of the compressor Q.

[0116] Understandably, a larger pressure difference indicates that the compressor Q is currently operating at a higher intensity, thus requiring no additional subcooling and therefore no need to open the solenoid valve F. Conversely, a smaller pressure difference indicates that the compressor Q is currently operating at a lower intensity, thus requiring additional subcooling and therefore opening the solenoid valve F to increase the subcooling.

[0117] In this embodiment, a preset difference threshold is specifically set; the specific value of the preset difference threshold can be set based on actual needs.

[0118] When the pressure difference is less than the preset difference threshold, the compressor Q is considered to be in a low pressure difference condition. At this time, the flash vapor is output to the evaporator Z by opening the solenoid valve F to improve the subcooling. When the pressure difference is greater than or equal to the preset difference threshold, the compressor Q is considered to be in a high pressure difference condition. At this time, the solenoid valve F is closed, and there is no need to perform the subcooling increase operation.

[0119] In this embodiment, the switching state of the solenoid valve F is determined based on the pressure difference, thereby determining whether the subcooling needs to be increased based on the actual needs of the compressor Q, which can improve the subcooling under low pressure difference conditions.

[0120] See Figure 3 The overall implementation principle of this application will be explained below.

[0121] When intermediate gas supply is not used, this application shuts off the intermediate gas supply switch unit and sets up a buffer chamber A at the gas supply port of compressor Q to minimize the pulsation when the airflow of intermediate gas supply reverses.

[0122] When the unit is running normally, the refrigerant liquid after heat exchange in the condenser C flows through the main pipeline 1, and the main pipeline 1 flows into the plate heat exchanger K. After heat exchange, it enters the pipeline 2. The intermediate gas supply pipeline 3 takes liquid from the main pipeline 1, throttles it through the orifice plate, and then enters the plate heat exchanger K to exchange heat with the refrigerant liquid in the main pipeline. After heat exchange, flash vapor is obtained and then fed into the compressor Q for refrigeration cycle.

[0123] The first maintenance valve X1, the second maintenance valve X2, and the third maintenance valve X3 before and after the plate heat exchanger pipeline are used for plate heat exchanger maintenance and are normally closed by default.

[0124] A pressure sensor PP and an electric valve M are installed on the air supply line 3.

[0125] Pipeline 4 is installed, and a solenoid valve FF is installed on pipeline 4. When the electric valve ME is closed, the electric valve MF can be opened to achieve double throttling. The condensate is throttled once before passing through the main electronic expansion valve to increase the subcooling.

[0126] In other embodiments, a check valve may be installed in the middle of the gas supply line.

[0127] In other embodiments, a spring structure can be installed on the air supply line to buffer vibration.

[0128] Specific implementation process: Based on the unit's operating conditions, the control process is divided into four stages; In the first stage, the unit load will change accordingly when the unit is first started or when the external water temperature changes drastically. This will have a significant impact on the intermediate pressure of the unit. If the air supply is turned on at this time, the pressure pulsation will cause a large impact on the air supply pipeline, which will have an adverse effect on the pipeline life.

[0129] Therefore, it is necessary to monitor the load change rate over a period of time.

[0130] For variable frequency units: Load change rate:

[0131] For fixed-frequency generator units, the load change rate is:

[0132] If f(J) ≥ the preset stable load change rate threshold X, the electric valve M is closed.

[0133] If f(J) < preset stable load change rate threshold X, then the precondition for opening the electric valve M is met, and the next control stage is executed.

[0134] The second stage involves monitoring the replenishment pressure P over a specific period. The direct factor determining whether pressure pulsation occurs is the range of intermediate replenishment pressures. It can be approximated that a large range over a period indicates unstable replenishment pressure, causing pressure pulsation, which significantly impacts the replenishment pipeline and negatively affects its lifespan. Therefore, it's necessary to selectively activate the electric valve M only when the replenishment pressure is stable and the replenishment range is small, minimizing the impact of pressure pulsation.

[0135] Define the following parameters:

[0136] N: Preset range threshold; If L > N, the electric valve M will also be closed. If L≤N, the electric valve M opens.

[0137] The third stage is that when the electric valve M opens or closes, it is not suddenly fully open or suddenly fully closed. Based on past project experience, if the electric valve M suddenly opens or closes, it may cause pressure shock, which is not conducive to the life of the air supply line.

[0138] Therefore, an electric valve M is used to achieve gradual opening, such as opening from 20% to 100% within 5 seconds, reducing the dynamic stress at the moment of opening; the same applies to closing the electric valve M; this control logic is to minimize the alternating stress in the pipeline.

[0139] In existing industry practices, when the gas supply line is closed, the plate heat exchanger K ceases heat exchange and functions solely as a piping component, used only for refrigerant transport. Bypassing at low pressure differentials increases the unit's COP by enhancing subcooling. When the bypass is closed and the gas supply line is open, the unit's cooling capacity is increased by increasing the gas supply volume and thus the compressor Q's workload, but this also increases the unit's power consumption. This application proposes a pipe 4 that, even when the gas supply line is closed, can simultaneously utilize the upper plate heat exchanger K to enhance the unit's subcooling and improve its cooling efficiency.

[0140] Therefore, in the fourth stage of control, if the electric valve M is closed, the unit's intake and exhaust pressure difference will be detected. Only when the pressure difference is low, it is meaningful to improve the subcooling by bypassing the pipeline.

[0141] Define the following parameters: The pressure difference Y = P_exhaust - P_intake represents the difference between the exhaust pressure and the intake pressure. T: Preset difference threshold; F: The on / off state of solenoid valve F (0 indicates closed, 1 indicates open); The valve state can be expressed as: F = 1 - H(YT)

[0142] If Y < T, then solenoid valve F is opened, and flash vapor flows into the main liquid pipeline through pipe 4, increasing the subcooling.

[0143] If Y ≥ T, then keep the solenoid valve F closed.

[0144] After this phase is completed, the control logic will return to phase one and repeat the loop, continuously monitoring the status of the gas supply line.

[0145] By integrating the above four stages of control, it can be ensured that the gas supply line will not be affected when the unit does not require gas supply or when the gas supply pressure fluctuates greatly. At the same time, it can improve the subcooling of the unit under low pressure differential conditions.

[0146] When the unit needs to use supplemental air, it can ensure that the pressure fluctuation of the supplemental air is within a reasonable and controllable range, thus ensuring the safe operation of the system.

[0147] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0148] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0149] This application also provides an air conditioning system control device for implementing the above-described air conditioning system control method. The air conditioning system control device is installed within the air conditioning system and includes: The first acquisition module is used to acquire the operating data of the compressor Q of the air conditioning system; The first judgment module is used to determine whether there is an impact risk at the air inlet of the compressor Q based on the operating data; The first shut-off module is used to shut off the switch unit if there is a risk of impact at the gas supply port of the compressor Q, so as to stop the gas supply to the compressor Q through the gas supply unit; The first activation module is used to activate the switching unit if there is no risk of impact at the air supply port of the compressor Q, so as to supply air to the compressor Q through the air supply unit.

[0150] This air conditioning system control device is equipped with a switching unit. When there is a risk of impact at the air supply port of compressor Q, the switching unit is turned off, thereby avoiding the impact of air supply pressure on the air supply pipeline. When there is no risk of impact at the air supply port of compressor Q, the switching unit is turned on to realize the air supply function. That is, this application can realize the air supply function while avoiding the risk of air supply pipeline being damaged by impact, thus ensuring the reliability of the air conditioning system.

[0151] It should be noted that the first acquisition module in this embodiment can be used to execute step S10 in this application embodiment, the first judgment module in this embodiment can be used to execute step S20 in this application embodiment, the first closing module in this embodiment can be used to execute step S30 in this application embodiment, and the first opening module in this embodiment can be used to execute step S40 in this application embodiment.

[0152] Furthermore, the first determination module includes: The first determining unit is used to determine the current load change rate of the air conditioning system based on the operating data; The first acquisition unit is used to acquire a preset stable load change rate threshold and determine whether the current load change rate reaches the preset stable load change rate threshold. The second determining unit is used to determine that there is an impact risk at the gas supply port of the compressor Q if the current load change rate reaches the preset stable load change rate threshold.

[0153] Furthermore, the first determination module also includes: The first judgment unit is used to determine whether the current load change rate has reached the preset stable load change rate threshold. If the current load change rate is less than the preset stable load change rate threshold, the current range of the gas supply pressure within the current monitoring time window is determined based on the operating data. The second acquisition unit is used to acquire a preset range threshold and determine whether the current range is greater than the preset range threshold. The third determining unit is used to determine that there is an impact risk at the air inlet of the compressor Q if the current range is greater than the preset range threshold. The fourth determining unit is used to determine that there is no impact risk at the air supply port of the compressor Q if the current range is less than or equal to the preset range threshold.

[0154] Furthermore, the switching unit includes an electric valve M, and the first shut-off module includes: The third acquisition unit is used to acquire the preset adjustment time and the current opening degree of the electric valve M; The first adjustment unit is used to reduce the opening degree of the electric valve M within the preset adjustment time, so as to reduce the opening degree of the electric valve M from the current opening degree to the closed opening degree.

[0155] Furthermore, the air conditioning system control device includes: The second shut-off module is used to shut off the switch unit to stop the compressor Q from receiving gas through the gas supply unit, and then obtain the current exhaust pressure and current intake pressure of the compressor Q. The first calculation module is used to calculate the pressure difference between the current exhaust pressure and the current intake pressure. The second judgment module is used to obtain a preset difference threshold and determine whether the pressure difference is less than the preset difference threshold. The first opening module is used to open the solenoid valve F if the pressure difference is less than the preset difference threshold, so as to output the flash vapor of the gas supply unit to the evaporator Z.

[0156] Reference Figure 4 In terms of hardware structure, the electronic device may include components such as a communication module 10, a memory 20, and a processor 30. In the electronic device, the processor 30 is connected to both the memory 20 and the communication module 10. The memory 20 stores a computer program, which is executed by the processor 30. When the computer program is executed, it implements the steps of the above-described method embodiments.

[0157] The communication module 10 can connect to external communication devices via a network. The communication module 10 can receive requests from the external communication devices and can also send requests, instructions, and information to the external communication devices. The external communication devices can be other electronic devices, servers, or IoT devices, such as televisions, etc.

[0158] The memory 20 can be used to store software programs and various data. The memory 20 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as obtaining operating data of the air conditioning system's compressor), etc.; the data storage area may include a database, and may store data or information created based on system usage. Furthermore, the memory 20 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0159] The processor 30 is the control center of the electronic device. It connects various parts of the electronic device via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 20, and by calling data stored in the memory 20, it performs various functions and processes data, thereby providing overall monitoring of the electronic device. The processor 30 may include one or more processing units; optionally, the processor 30 may integrate an application processor and a modem processor. The application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 30.

[0160] although Figure 4 Not shown, but the above-described electronic device may further include a circuit control module for connecting to a power supply to ensure the normal operation of other components. Those skilled in the art will understand that... Figure 4 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0161] The present invention also proposes a computer-readable storage medium having a computer program stored thereon. The computer-readable storage medium may be... Figure 4 The memory 20 in the electronic device may also be at least one of ROM (Read-Only Memory) / RAM (Random Access Memory), magnetic disk, optical disk, etc. The computer-readable storage medium includes a number of instructions to cause a terminal device with a processor (which may be a television, automobile, mobile phone, computer, server, terminal, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0162] In this invention, the terms "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0163] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0164] Although embodiments of the present invention have been shown and described above, the scope of protection of the present invention is not limited thereto. It is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, and substitutions to the above embodiments within the scope of the present invention, and such changes, modifications, and substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air conditioning system, characterized in that, The air conditioning system includes a basic circulation module and a gas replenishment module. The basic circulation module includes a compressor, and the gas replenishment module includes a gas replenishment unit and a switching unit. The gas replenishment port of the compressor is connected to the gas replenishment unit through the switching unit. The switching unit is used to close the switching unit when there is a risk of impact at the air inlet of the compressor, so as to stop the air supply to the compressor through the air supply unit; and to open the switching unit when there is no risk of impact at the air inlet of the compressor, so as to supply air to the compressor through the air supply unit.

2. The air conditioning system as described in claim 1, characterized in that, The switching unit includes an electric valve and a buffer chamber; wherein: The first end of the electric valve is connected to the air supply port of the compressor through the buffer chamber, and the second end of the electric valve is connected to the air supply unit.

3. The air conditioning system as described in claim 1, characterized in that, The basic circulation module further includes an evaporator, a condenser, and a first throttling device; the gas replenishment unit includes a plate heat exchanger and a second throttling device; wherein: The output end of the condenser is connected to the first end of the first side of the plate heat exchanger, and the second end of the second side of the plate heat exchanger is connected to the input end of the condenser through the first throttling device; The output end of the condenser is also connected to the first end of the second side of the plate heat exchanger through the second throttling device, and the second end of the second side of the plate heat exchanger is connected to the switching unit.

4. The air conditioning system as described in claim 3, characterized in that, The air replenishment unit also includes a solenoid valve; wherein: The first end of the solenoid valve is connected to the second end of the second side of the plate heat exchanger, and the second end of the solenoid valve is connected to the input end of the evaporator through the throttling device.

5. The air conditioning system as described in claim 1, characterized in that, The air conditioning system further includes a first pressure sensor and a second pressure sensor; wherein: The first pressure sensor is located at the air inlet of the compressor; The second pressure sensor is located at the exhaust port of the compressor.

6. A method for controlling an air conditioning system, characterized in that, The air conditioning system control method is applied to the air conditioning system as described in any one of claims 1 to 5, and the air conditioning system control method includes: Obtain the operating data of the air conditioning system's compressor; Based on the operating data, determine whether there is a risk of impact at the compressor's air inlet; If there is a risk of impact at the compressor's air supply port, the switching unit is turned off to stop supplying air to the compressor through the air supply unit; If there is no risk of impact at the compressor's air inlet, the switching unit is turned on to supply air to the compressor through the air supply unit.

7. The air conditioning system control method as described in claim 6, characterized in that, The step of determining whether there is a risk of impact at the compressor's air inlet based on the operating data includes: The current load change rate of the air conditioning system is determined based on the operating data. Obtain a preset stable load change rate threshold, and determine whether the current load change rate reaches the preset stable load change rate threshold. If the current load change rate reaches the preset stable load change rate threshold, it is determined that there is an impact risk at the compressor's air inlet.

8. The air conditioning system control method as described in claim 7, characterized in that, The step of determining whether the current load change rate has reached the preset stable load change rate threshold includes: If the current load change rate is less than the preset stable load change rate threshold, then the current range of the gas supply pressure within the current monitoring time window is determined based on the operating data. Obtain a preset range threshold and determine whether the current range is greater than the preset range threshold; If the current range is greater than the preset range threshold, it is determined that there is an impact risk at the compressor's air inlet. If the current range is less than or equal to the preset range threshold, then it is determined that there is no impact risk at the compressor's air inlet.

9. The air conditioning system control method as described in claim 6, characterized in that, The switching unit includes an electric valve, and the closing switching unit includes: Obtain the preset adjustment time and the current opening degree of the electric valve; The opening degree of the electric valve is reduced within the preset adjustment time to reduce the opening degree of the electric valve from the current opening degree to the closed opening degree.

10. The air conditioning system control method as described in claim 6, characterized in that, The closing switch unit, after stopping the gas supply to the compressor via the gas supply unit, includes: Obtain the current discharge pressure and current intake pressure of the compressor; Calculate the pressure difference between the current exhaust pressure and the current intake pressure; Obtain a preset difference threshold and determine whether the pressure difference is less than the preset difference threshold; If the pressure difference is less than the preset difference threshold, the solenoid valve is opened to output the flash vapor from the gas supply unit to the evaporator.

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