A control method and air conditioning system

Abstract

This invention provides a control method and an air conditioning system, relating to the field of air conditioning technology, and solves the technical problem of compressors rapidly increasing their frequency, leading to easy shutdown or frequency reduction. The control method, used for rapidly cooling an air conditioning system, includes: acquiring the real-time temperature of indoor cooling components; determining whether rapid cooling conditions have been met based on the acquired real-time temperature; and when the determination result indicates that rapid cooling conditions have been met, controlling the air conditioning system to switch to rapid cooling mode to reduce the temperature of the indoor cooling components. The air conditioning system is used to execute the control method, and includes a rapid cooling component connected in parallel with an electronic expansion valve, wherein the electronic expansion valve and the rapid cooling component are selectively connected; the rapid cooling component includes a vortex tube, an ejector, and a gas-liquid separator. This invention can achieve rapid cooling without rapidly increasing the compressor frequency.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a control method and an air conditioning system. Background Technology

[0002] With the increasing popularity of air conditioners and the advancement of air conditioning technology, users' demand for rapid cooling is growing stronger. In order to achieve rapid cooling, traditional air conditioning systems often increase the compressor frequency quickly. However, a rapid increase in compressor frequency may cause excessively high discharge pressure and a sharp rise in current. When the system cannot adjust in time, it may cause the system to shut down or reduce its frequency. At the same time, it may also cause compressor reliability issues, which will reduce the user experience.

[0003] To alleviate the problems caused by the rapid frequency increase of the compressor and to ensure that the air conditioning system can achieve rapid cooling, this invention proposes an air conditioning system with a vortex tube and an ejector. Summary of the Invention

[0004] The purpose of this invention is to provide a control method and an air conditioning system to solve the technical problems of compressors rapidly increasing frequency, easily shutting down, or limiting frequency reduction in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] In a first aspect, the present invention provides a control method for rapidly cooling an air conditioning system, comprising:

[0007] Obtain the real-time temperature of the indoor cooling components;

[0008] Based on the real-time temperature of the indoor cooling components, determine whether the conditions for rapid cooling have been met.

[0009] When the judgment result indicates that the rapid cooling condition has been met, the air conditioning system is switched to rapid cooling mode to reduce the temperature of the indoor cooling components.

[0010] Furthermore, the real-time temperature of the indoor cooling components includes the pipe temperature of the indoor heat exchanger.

[0011] Furthermore, the step of determining whether rapid cooling conditions have been met based on the acquired real-time temperature of the indoor cooling components includes:

[0012] Preset start-up tube temperature;

[0013] Compare the real-time temperature of the indoor cooling components with the preset start-up pipe temperature;

[0014] When the real-time temperature of the indoor cooling component is greater than the preset start-up pipe temperature, it is determined that the rapid cooling condition has been met.

[0015] Furthermore, when the judgment result indicates that rapid cooling conditions have been met, controlling the air conditioning system to switch to rapid cooling mode to reduce the temperature of the indoor cooling components includes:

[0016] Close the electronic expansion valve and open the control valve to switch to the rapid cooling unit for cooling.

[0017] Obtain the opening value of the hot-end regulating valve of the vortex tube in the rapid cooling assembly;

[0018] Based on the comparison between the opening value of the hot-end regulating valve of the vortex tube in the rapid cooling component and the preset first opening value of the hot-end regulating valve when the cooling effect is optimal, the opening value of the hot-end regulating valve of the vortex tube is adjusted.

[0019] Furthermore, the adjustment of the hot-end regulating valve opening value of the vortex tube in the rapid cooling component, based on the comparison result between the obtained opening value of the hot-end regulating valve and the preset first opening value of the hot-end regulating valve when the cooling effect is optimal, includes:

[0020] When the obtained opening value of the hot end regulating valve of the vortex tube is less than the preset first opening value, the opening of the hot end regulating valve of the vortex tube is increased.

[0021] When the obtained opening value of the hot end regulating valve of the vortex tube is greater than the preset first opening value, the opening of the hot end regulating valve of the vortex tube is reduced.

[0022] Furthermore, after determining that the rapid cooling condition has been met, the step of controlling the air conditioning system to switch to rapid cooling mode also includes:

[0023] Obtain the cooling temperature of the indoor cooling components;

[0024] Based on the obtained cooling temperature of the indoor cooling components, determine whether the exit condition has been met;

[0025] When the judgment result indicates that the exit condition has been met, the air conditioning system is switched from rapid cooling mode to normal cooling mode.

[0026] Furthermore, determining whether the exit requirement has been met based on the obtained cooling temperature of the indoor cooling component includes:

[0027] Preset exit temperature;

[0028] Compare the obtained cooling temperature of the indoor cooling component with the preset exit temperature;

[0029] When the cooling temperature of the indoor cooling component reaches the preset exit temperature, it is determined that the exit condition has been met.

[0030] Furthermore, the preset exit temperature includes:

[0031] To reduce the evaporation temperature, subtract 10-20°C from the indoor ambient temperature; or...

[0032] Exit air outlet temperature refers to the temperature at the air outlet of the indoor unit in the air conditioning system.

[0033] Furthermore, when the judgment result indicates that the exit requirement has been met, controlling the air conditioning system to switch from rapid cooling mode to normal cooling mode includes:

[0034] Gradually open the electronic expansion valve;

[0035] Until the electronic expansion valve reaches the preset opening;

[0036] When the electronic expansion valve reaches the preset opening degree, the control valve is closed.

[0037] The control method provided by this invention is a control method for an air conditioning system with a vortex tube and an ejector. The air conditioning system includes a vortex tube, an ejector or inducing ejector, and a gas-liquid separator, etc. In the rapid cooling stage, the low-temperature refrigerant at the cold end outlet of the vortex tube is used to reduce the temperature of the indoor heat exchanger tubes and the outlet air temperature to achieve rapid cooling. The gas-liquid separator is used to control the refrigerant entering the indoor heat exchanger to be in a liquid state, thereby improving the heat transfer efficiency of the indoor heat exchanger and accelerating the reduction of the outlet air temperature. The ejector is used to depressurize and induce the refrigerant at the hot end outlet of the vortex tube, and the ejector can reduce throttling losses. The control method of this invention enables the air conditioning system to achieve rapid cooling without rapidly increasing the compressor frequency.

[0038] Secondly, the present invention provides an air conditioning system for executing the control method, the air conditioning system including a rapid cooling component arranged in parallel with an electronic expansion valve, the electronic expansion valve and the rapid cooling component being connected to an indoor heat exchanger in an alternative manner.

[0039] Furthermore, the rapid cooling assembly includes a vortex tube, an ejector (also known as an ejector), and a gas-liquid separator, wherein:

[0040] The ejector and the gas-liquid separator are arranged in sequence;

[0041] The hot end of the vortex tube is connected to the ejector nozzle of the injector.

[0042] The liquid outlet of the gas-liquid separator is connected in parallel with the cold end tube of the vortex tube;

[0043] The gas outlet of the gas-liquid separator is connected to the inlet nozzle of the vortex tube.

[0044] Furthermore, the rapid cooling assembly also includes a control valve disposed on the front side of the injector active nozzle, a one-way valve disposed on the liquid outlet side of the gas-liquid separator and on the cold end tube of the vortex tube.

[0045] The air conditioning system provided by this invention includes a vortex tube, an ejector, and a gas-liquid separator. In the rapid cooling stage, the low-temperature refrigerant at the cold end outlet of the vortex tube is used to reduce the temperature of the indoor heat exchanger tubes and the outlet air temperature, thereby achieving rapid cooling. The gas-liquid separator controls the refrigerant entering the indoor heat exchanger to be in a liquid state, improving the heat transfer efficiency of the indoor heat exchanger and thus accelerating the reduction of the outlet air temperature. The ejector is used to depressurize and eject the refrigerant at the hot end outlet of the vortex tube, and the ejector can reduce throttling losses. The air conditioning system of this invention can achieve rapid cooling without rapidly increasing the compressor frequency. Attached Figure Description

[0046] 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, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a diagram showing the refrigerant flow direction during rapid cooling in the air conditioning system of this invention (dashed lines indicate no refrigerant flow).

[0048] Figure 2 This is a three-dimensional structural schematic diagram of the vortex tube in the air conditioning system of the present invention;

[0049] Figure 3 This is a front view of the vortex tube in the air conditioning system of the present invention;

[0050] Figure 4 This is an end view of the vortex tube in the air conditioning system of the present invention;

[0051] Figure 5 This is a schematic diagram of the jet pipe structure and typical internal pressure, temperature and velocity distribution in the air conditioning system of this invention;

[0052] Figure 6 This is a diagram of the rapid cooling control strategy for the air conditioning system of the present invention;

[0053] Figure 7 This is a flowchart of the control method for the air conditioning system of the present invention to exit rapid cooling and resume normal cooling;

[0054] Figure 8 This is a diagram showing the refrigerant flow direction during normal cooling in the air conditioning system of this invention (dashed lines indicate no refrigerant flow).

[0055] In the diagram: 1. Compressor; 2. Four-way valve; 3. Outdoor heat exchanger; 4. Electronic expansion valve; 5. Indoor heat exchanger; 6. Liquid receiver; 7. Control valve; 8. Ejector; 9. Gas-liquid separator; 10. Vortex tube; 101. Inlet nozzle; 102. Vortex chamber; 103. Cold end pipe; 104. Hot end pipe; 105. Hot end regulating valve; 11, 12. Check valve. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0057] This invention provides a control method for rapidly cooling an air conditioning system, comprising:

[0058] The real-time temperature of the indoor cooling components is obtained; furthermore, the real-time temperature of the indoor cooling components includes the pipe temperature of the indoor heat exchanger 5.

[0059] Based on the real-time temperature of the indoor cooling components, determine whether the conditions for rapid cooling have been met.

[0060] Specifically, firstly, the startup pipe temperature is preset;

[0061] Secondly, the real-time temperature of the indoor cooling component, namely the pipe temperature of the indoor heat exchanger 5, is compared with the preset start-up pipe temperature.

[0062] When the real-time temperature of the indoor cooling component, i.e. the pipe temperature of the indoor heat exchanger 5, is greater than the preset start-up pipe temperature, it is determined that the rapid cooling condition has been met.

[0063] In this embodiment, the preset start-up pipe temperature is 16°C. That is, when the obtained pipe temperature of the indoor heat exchanger 5 exceeds 16°C, the air conditioning system needs to be switched from the normal cooling mode to the rapid cooling mode.

[0064] When the judgment result indicates that the rapid cooling condition has been met, the air conditioning system is switched to rapid cooling mode to reduce the temperature of the indoor cooling components.

[0065] In this embodiment, controlling the air conditioning system to switch to rapid cooling mode includes the following steps:

[0066] First, close the electronic expansion valve to cut off the refrigerant flow path in normal cooling mode. Then, open control valve 7 to allow the refrigerant to flow into the fast cooling component, thereby switching to the mode where the fast cooling component provides cooling, which is the rapid cooling mode.

[0067] Then, obtain the opening value of the hot end regulating valve 105 of the vortex tube 10 in the rapid cooling assembly;

[0068] Based on the comparison between the opening value of the hot-end regulating valve 105 of the vortex tube 10 in the rapid cooling component and the first opening value of the hot-end regulating valve when the cooling effect is optimal, the opening value of the vortex tube hot-end regulating valve is adjusted.

[0069] It should be noted that, in this embodiment, in order to utilize the rapid cooling capability of the vortex tube, the preset first opening value of the hot end regulating valve 105 of the vortex tube 10 should be such that when the valve is opened to the first opening value, the cold flow rate (the ratio of the cold end outlet mass flow rate to the inlet mass flow rate) of the vortex tube 10 is between 0.5 and 0.8, thereby ensuring that the cold end outlet temperature of the vortex tube is low, so that the tube temperature and outlet air temperature of the indoor heat exchanger 5 are reduced rapidly, achieving the purpose of rapid cooling.

[0070] Furthermore, based on the comparison between the obtained opening value of the hot-end regulating valve of the vortex tube in the rapid cooling component and the preset first opening value of the hot-end regulating valve when the cooling effect is optimal, the opening value of the vortex tube hot-end regulating valve is adjusted, including:

[0071] When the obtained opening value of the hot end regulating valve of the vortex tube is less than the preset first opening value, the opening of the hot end regulating valve of the vortex tube is increased.

[0072] When the obtained opening value of the hot end regulating valve of the vortex tube is greater than the preset first opening value, the opening of the hot end regulating valve of the vortex tube is reduced.

[0073] Furthermore, when the judgment result indicates that the rapid cooling condition has been met, after controlling the air conditioning system to switch to rapid cooling mode, the following steps are also included:

[0074] Obtain the cooling temperature of the indoor cooling components;

[0075] Based on the obtained cooling temperature of the indoor cooling components, determine whether the exit condition has been met;

[0076] Specifically, including:

[0077] Preset exit temperature;

[0078] Compare the obtained cooling temperature of the indoor cooling component with the preset exit temperature;

[0079] When the cooling temperature of the indoor cooling component reaches the preset exit temperature, it is determined that the exit condition has been met.

[0080] The preset exit temperature includes:

[0081] To reduce the evaporation temperature, subtract 10-20°C from the indoor ambient temperature; or...

[0082] Exit air outlet temperature refers to the temperature at the air outlet of the indoor unit in the air conditioning system.

[0083] When the judgment result indicates that the exit condition has been met, the air conditioning system is switched from rapid cooling mode to normal cooling mode, including:

[0084] Gradually open the electronic expansion valve;

[0085] Until the electronic expansion valve reaches the preset opening;

[0086] When the electronic expansion valve reaches the preset opening degree, the control valve is closed.

[0087] The control method provided by this invention is a control method for an air conditioning system with a vortex tube and an ejector. The air conditioning system includes a vortex tube, an ejector or inducing ejector, and a gas-liquid separator, etc. In the rapid cooling stage, the low-temperature refrigerant at the cold end outlet of the vortex tube is used to reduce the temperature of the indoor heat exchanger tubes and the outlet air temperature to achieve rapid cooling. The gas-liquid separator is used to control the refrigerant entering the indoor heat exchanger to be in a liquid state, thereby improving the heat transfer efficiency of the indoor heat exchanger and accelerating the reduction of the outlet air temperature. The ejector is used to depressurize and induce the refrigerant at the hot end outlet of the vortex tube, and the ejector can reduce throttling losses. The control method of this invention enables the air conditioning system to achieve rapid cooling without rapidly increasing the compressor frequency.

[0088] Example 1:

[0089] The rapid cooling control method of the air conditioning system of the present invention, when the air conditioning system is in cooling mode, such as Figure 6 As shown.

[0090] During cooling, the pipe temperature of the indoor heat exchanger 5 is first obtained to determine whether the preset start-up pipe temperature of 16℃ for rapid cooling has been reached. If the real-time pipe temperature is higher than the preset start-up pipe temperature, the control valve 7 is opened and the electronic expansion valve 4 is closed to enter the rapid cooling mode. In the rapid cooling mode, the opening of the hot end regulating valve 105 of the vortex tube 10 also needs to be adjusted according to the actual situation. Specifically, the current opening value of the hot end regulating valve 105 is obtained and compared with the preset first opening value of the hot end regulating valve when the cooling effect is optimal. The opening of the hot end regulating valve 105 is gradually increased or decreased to reduce the outlet temperature of the cold end pipe 103 of the vortex tube 10, thereby reducing the pipe temperature of the indoor heat exchanger 5 and achieving the goal of rapidly reducing the outlet air temperature.

[0091] Since the minimum temperature for air conditioning cooling is 16°C, in this embodiment, the preset start-up pipe temperature is 16°C. That is, when the real-time pipe temperature is greater than 16°C, rapid cooling is required.

[0092] like Figure 7 The diagram shows the control flow chart of the air conditioning system of this invention after switching to rapid cooling mode and then exiting rapid cooling to resume normal cooling. When the air conditioner is in rapid cooling mode, the evaporation temperature or outlet air temperature of the indoor heat exchanger 5 is obtained. When the evaporation temperature or outlet air temperature reaches the preset exit temperature, it indicates that the system has the ability to provide a considerable amount of cooling capacity. At this time, the electronic expansion valve 4 is gradually opened to the preset opening degree, and the control valve 7 is closed. The air conditioning system returns to the normal cooling state. The refrigerant flow direction during normal cooling is as follows: Figure 8 As shown in the figure. The preset evaporation temperature is an estimated value equal to the indoor ambient temperature of -10 to 20°C. The preset air outlet temperature is the temperature at the air outlet of the indoor unit of the air conditioner.

[0093] This invention utilizes the rapid thermal separation effect of vortex tubes and the pressure-reducing ejection characteristics of ejectors. During rapid cooling, the high-pressure, low-temperature refrigerant in the outdoor heat exchanger expands and depressurizes in the ejector, becoming a gas-liquid two-phase flow that enters the gas-liquid separator. The liquid refrigerant in the gas-liquid separator directly enters the indoor heat exchanger for evaporation, improving the heat transfer efficiency of the indoor heat exchanger and facilitating a faster reduction in outlet air temperature. The gaseous refrigerant in the gas-liquid separator enters the vortex tube for rapid thermal separation. The refrigerant at the cold end of the vortex tube, with an even lower outlet temperature, is introduced into the indoor heat exchanger, which helps reduce the tube temperature and outlet air temperature of the indoor heat exchanger, thereby accelerating cooling. Simultaneously, the use of ejectors to approximate isentropic pressure reduction and eject the refrigerant at the hot end of the vortex tube reduces throttling losses during the rapid cooling phase.

[0094] The present invention provides an air conditioning system for performing the above-described control method. The air conditioning system includes a rapid cooling component arranged in parallel with an electronic expansion valve 4. The electronic expansion valve 4 and the rapid cooling component are connected to an indoor heat exchanger 5 in an alternative manner. The air conditioning system of the present invention can achieve rapid cooling without rapidly increasing the compressor frequency.

[0095] In this embodiment, the rapid cooling assembly includes a vortex tube 10, an ejector 8, and a gas-liquid separator 9, wherein:

[0096] The ejector 8 and the gas-liquid separator 9 are arranged in sequence, and the refrigerant flows into the gas-liquid separator 9 after passing through the ejector 8;

[0097] The hot end tube 104 of the vortex tube 10 is connected to the ejector nozzle of the ejector 8, and the ejector 8 is used to recover the hot gas flow discharged from the hot end tube 104 of the vortex tube 10.

[0098] The liquid outlet of the gas-liquid separator 9 is connected in parallel with the cold end tube 103 of the vortex tube 10 and connected to the indoor heat exchanger 5 to supply low-temperature refrigerant to the indoor heat exchanger 5 respectively.

[0099] The vortex tube 10 separates the gas at the outlet of the gas-liquid separator 9 into two gases with different temperatures. One gas with a higher temperature is recovered by the ejector 8, and the other gas with a lower temperature enters the indoor heat exchanger 5.

[0100] The active nozzle of the ejector 8 is connected to the outlet of the outdoor heat exchanger 3 to depressurize the refrigerant at the outlet of the outdoor heat exchanger 3. Then, the ejector nozzle is connected to the hot end tube 104 of the vortex tube 10 to eject the gas at the hot end outlet of the vortex tube 10. The outlet of the ejector 8 is connected to the gas-liquid separator 9 to send the refrigerant into the gas-liquid separator 9 to achieve rapid cooling.

[0101] By setting up an ejector 8, the hot-end airflow of the vortex tube 10 is used as the jet of the ejector 8. After mixing and cooling with the main flow of the ejector 8, the airflow enters the gas-liquid separator 9, thus realizing the recovery and utilization of the hot airflow. In addition, the energy utilization efficiency of the ejector 8 is higher than that of the electronic expansion valve. When using the ejector 8 instead of the electronic expansion valve for throttling during rapid cooling, the throttling loss can be reduced.

[0102] The gas outlet of the gas-liquid separator 9 is connected to the inlet nozzle of the vortex tube 10.

[0103] The gas-liquid separator 9 is provided in this invention because the cold and heat separation capability can only be achieved when the inlet fluid of the vortex tube 10 is gas. When the inlet of the vortex tube 10 is a two-phase flow of gas and liquid or a liquid, its cold and heat separation capability is greatly reduced or even non-existent. By setting up the gas-liquid separator 9, the two-phase flow at the outlet of the ejector 8 can be separated into gas and liquid, so that the fluid entering the vortex tube 10 is pure gas. Based on this, the cold and heat separation performance of the vortex tube 10 can be utilized to achieve rapid cooling.

[0104] The air conditioning system of the present invention utilizes the ejector 8 and the vortex tube 10 for rapid cooling, which has obvious effect, is easy to operate, and is conducive to widespread use.

[0105] Furthermore, the rapid cooling assembly also includes a control valve 7 located in front of the active nozzle of the injection pipe 8, and check valves 11 and 12 located on the liquid outlet side of the gas-liquid separator 9 and on the cold end pipe 103 of the vortex pipe 10.

[0106] The air conditioning system provided by this invention includes a vortex tube, an ejector or inlet ejector, and a gas-liquid separator. In the rapid cooling stage, the low-temperature refrigerant at the cold end outlet of the vortex tube is used to reduce the temperature of the indoor heat exchanger tubes and the outlet air temperature, enabling rapid cooling without rapidly increasing the compressor frequency. The gas-liquid separator controls the refrigerant entering the indoor heat exchanger to be in a liquid state, improving the heat transfer efficiency of the indoor heat exchanger and thus accelerating the reduction of the outlet air temperature. The ejector is used to depressurize and eject the refrigerant at the hot end outlet of the vortex tube, and the ejector can reduce throttling losses. The air conditioning system of this invention can achieve rapid cooling without rapidly increasing the compressor frequency.

[0107] Example 2:

[0108] The air conditioning system with vortex tube and ejector provided by this invention, such as Figure 1 As shown, it mainly includes compressor 1, four-way valve 2, outdoor heat exchanger 3, electronic expansion valve 4, indoor heat exchanger 5, liquid storage tank 6, control valve 7, ejector 8, gas-liquid separator 9, vortex tube 10, and one-way valve 11.

[0109] The structural schematic diagram of the vortex tube 10 is shown below. Figure 2-4 As shown, it mainly includes an inlet nozzle 101, a vortex chamber 102, a cold end pipe 103, a hot end pipe 104, and a hot end regulating valve 105.

[0110] The working principle of the vortex tube 10: High-pressure fluid enters tangentially from the inlet nozzle 101 of the vortex tube 10, expands within the vortex chamber 102, and undergoes high-speed circular motion to form a free vortex. The angular velocity of the central fluid near the axis of the vortex tube 10 is greater than that of the peripheral fluid on the inner wall of the vortex tube 10. Energy exchange occurs between the central and peripheral fluids; the peripheral fluid gains energy, its temperature increases, and it flows out from the outlet of the hot-end tube 104; the central fluid loses energy, its temperature decreases, and under the resistance of the hot-end regulating valve 105, it flows out in the opposite direction from the outlet of the cold-end tube 103, achieving rapid hot-cold separation. The airflow temperature and flow rate at the cold-end outlet of the vortex tube 10 can be controlled by adjusting the opening of the hot-end regulating valve 105.

[0111] A schematic diagram of the ejector 8 or the ejector is shown below. Figure 5 As shown, the ejector 8 includes main structures such as an active nozzle, a premixing section, a mixing section, and a diffuser section. Its working process is as follows: High-pressure fluid enters the active nozzle and expands approximately isentropically within the nozzle, resulting in a pressure and temperature drop. At the nozzle outlet, it is a high-speed, low-temperature active flow. In the premixing section, the high-speed active flow is used to guide a low-speed, low-pressure ejector flow. The two fluids are fully mixed in the mixing section through momentum exchange, and then enter the diffuser section where they are decelerated and pressurized before flowing out of the ejector outlet.

[0112] This invention utilizes a combination of an ejector 8 and a vortex tube 10 to achieve rapid cooling. The refrigerant flow process during the rapid cooling phase is as follows: Figure 1As shown. When the air conditioning system is turned on and rapid cooling is required, control valve 7 is opened and electronic expansion valve 4 is closed. The high-temperature, high-pressure refrigerant from the compressor 1 outlet passes through four-way valve 2 into the outdoor heat exchanger 3 for cooling, becoming a high-pressure, low-temperature refrigerant. Then, it enters the active nozzle of ejector 8 for expansion, pressure reduction, and temperature reduction. The refrigerant at the outlet of ejector 8 is a gas-liquid two-phase flow. The gas-liquid two-phase refrigerant at the outlet of ejector 8 enters gas-liquid separator 9. The liquid in gas-liquid separator 9 enters indoor heat exchanger 5 through one-way valve 11 for evaporation and heat absorption, reducing the airflow from indoor heat exchanger 5. The gas in gas-liquid separator 9 enters the inlet nozzle of vortex tube 10. Due to the rapid heat and cold separation performance of vortex tube 10, the outlet of the cold end tube 103 of vortex tube 10 obtains a temperature lower than the inlet of vortex tube 10, and the outlet of the hot end tube 104 of vortex tube 10 obtains a temperature higher than the inlet of vortex tube 10. The cold end tube 103 outlet of the vortex tube 10 is connected to the inlet of the indoor heat exchanger 5 via a one-way valve 12, providing assistance for rapidly reducing the outlet air temperature. The hot end tube 104 outlet of the vortex tube is connected to the ejector 8's inlet flow. Under the action of the high-speed jet of the ejector's active flow, it is entrained into the ejector 8, which can recover the hot airflow from the hot end outlet of the vortex tube. The refrigerant at the outlet of the indoor heat exchanger 5 enters the inlet of the liquid receiver 6, and then enters the compressor 1 from the outlet of the liquid receiver 6, thus circulating continuously.

[0113] Since the hot-end airflow of the vortex tube is harmful to refrigeration, the hot-end airflow is used as the ejector jet, mixed with the ejector's main flow, cooled, and then enters the gas-liquid separator to achieve the recovery and utilization of the hot airflow.

[0114] During rapid cooling, the gas-liquid separator 9 ensures that the refrigerant entering the indoor heat exchanger 5 is in a liquid state, thereby improving the heat exchange efficiency of the indoor heat exchanger and accelerating the reduction of the outlet air temperature of the indoor heat exchanger 5. The vortex tube 10 can quickly separate the cold airflow into the indoor heat exchanger 5, thereby accelerating the reduction of the indoor heat exchanger tube temperature and outlet air temperature. The fluid in the active nozzle of the ejector 8 expands approximately isentropically, replacing the electronic expansion valve 4 during rapid cooling, which can reduce throttling losses. At the same time, it can entrain the gas at the outlet of the hot end tube 104 of the vortex tube, preventing it from reducing the cooling effect, thus forming a complete closed-loop system.

[0115] First, it should be noted that "inward" refers to the direction towards the center of the storage space, while "outward" refers to the direction away from the center of the storage space.

[0116] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the purpose of facilitating and simplifying the description of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0117] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0118] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0119] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0120] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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.

[0121] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included 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. A control method characterized by, A method for rapidly cooling an air conditioning system, the air conditioning system including a rapid cooling assembly arranged in parallel with an electronic expansion valve, the electronic expansion valve and the rapid cooling assembly being optionally connected to an indoor heat exchanger, the rapid cooling assembly including a vortex tube, an ejector, and a gas-liquid separator, wherein: the ejector and the gas-liquid separator are arranged sequentially; the hot end tube of the vortex tube is connected to the ejector nozzle; the liquid outlet of the gas-liquid separator is arranged in parallel with the cold end tube of the vortex tube; the gas outlet of the gas-liquid separator is connected to the inlet nozzle of the vortex tube; the method includes: Obtain the real-time temperature of the indoor cooling components; Based on the real-time temperature of the indoor cooling components, determine whether the conditions for rapid cooling have been met. When the judgment result indicates that the rapid cooling condition has been met, the air conditioning system is switched to rapid cooling mode to reduce the temperature of the indoor cooling components. During rapid cooling, the high-pressure, low-temperature refrigerant in the outdoor heat exchanger enters the ejector and the gas-liquid separator in sequence. The liquid refrigerant in the gas-liquid separator enters the indoor heat exchanger. The gaseous refrigerant in the gas-liquid separator enters the vortex tube. The refrigerant with an even lower temperature at the cold end outlet of the vortex tube is introduced into the indoor heat exchanger. The ejector reduces the pressure and ejects the refrigerant at the hot end outlet of the vortex tube.

2. The control method according to claim 1, characterized in that, The real-time temperature of the indoor cooling components includes the pipe temperature of the indoor heat exchanger.

3. The control method according to claim 1, characterized in that, The step of determining whether rapid cooling conditions have been met based on the real-time temperature of the indoor cooling components includes: Preset start-up tube temperature; Compare the real-time temperature of the indoor cooling components with the preset start-up pipe temperature; When the real-time temperature of the indoor cooling component is greater than the preset start-up pipe temperature, it is determined that the rapid cooling condition has been met.

4. The control method according to claim 1, characterized by, When the judgment result indicates that rapid cooling conditions have been met, controlling the air conditioning system to switch to rapid cooling mode to reduce the temperature of the indoor cooling components includes: Close the electronic expansion valve and open the control valve to switch to the rapid cooling unit for cooling. Obtain the opening value of the hot-end regulating valve of the vortex tube in the rapid cooling assembly; Based on the comparison between the opening value of the hot-end regulating valve of the vortex tube in the rapid cooling component and the preset first opening value of the hot-end regulating valve when the cooling effect is optimal, the opening value of the hot-end regulating valve of the vortex tube is adjusted.

5. The control method according to claim 4, characterized by The adjustment of the hot-end regulating valve opening value of the vortex tube in the rapid cooling component, based on the comparison between the obtained opening value of the hot-end regulating valve and the preset first opening value of the hot-end regulating valve when the cooling effect is optimal, includes: When the obtained opening value of the hot end regulating valve of the vortex tube is less than the preset first opening value, the opening of the hot end regulating valve of the vortex tube is increased. When the obtained opening value of the hot end regulating valve of the vortex tube is greater than the preset first opening value, the opening of the hot end regulating valve of the vortex tube is reduced.

6. The control method according to claim 1, characterized by When the judgment result indicates that the rapid cooling condition has been met, after controlling the air conditioning system to switch to rapid cooling mode, the method further includes: Obtain the cooling temperature of the indoor cooling components; Based on the obtained cooling temperature of the indoor cooling components, determine whether the exit condition has been met; When the judgment result indicates that the exit condition has been met, the air conditioning system is switched from rapid cooling mode to normal cooling mode.

7. The control method according to claim 6, characterized by The determination of whether the exit requirement has been met based on the obtained cooling temperature of the indoor cooling component includes: Preset exit temperature; Compare the obtained cooling temperature of the indoor cooling component with the preset exit temperature; When the cooling temperature of the indoor cooling component reaches the preset exit temperature, it is determined that the exit condition has been met.

8. The control method according to claim 7, characterized by, The preset exit temperature includes: To reduce the evaporation temperature, subtract 10-20°C from the indoor ambient temperature; or... Exit air outlet temperature refers to the temperature at the air outlet of the indoor unit in the air conditioning system.

9. The control method according to claim 6, characterized by, When the judgment result indicates that the exit requirement has been met, the control of the air conditioning system to switch from rapid cooling mode to normal cooling mode includes: Gradually open the electronic expansion valve; Until the electronic expansion valve reaches the preset opening; When the electronic expansion valve reaches the preset opening degree, the control valve is closed.

10. An air conditioning system for performing the control method as described in any one of claims 1-9, the air conditioning system comprising a rapid cooling component disposed in parallel with an electronic expansion valve, the electronic expansion valve and the rapid cooling component being optionally connected to an indoor heat exchanger. 11.The air conditioning system of claim 10, wherein, The rapid cooling assembly includes a vortex tube, an ejector, and a gas-liquid separator, wherein: The ejector and the gas-liquid separator are arranged in sequence; The hot end of the vortex tube is connected to the ejector nozzle of the injector. The liquid outlet of the gas-liquid separator is connected in parallel with the cold end tube of the vortex tube; The gas outlet of the gas-liquid separator is connected to the inlet nozzle of the vortex tube.

12. The air conditioning system of claim 11, wherein, The rapid cooling assembly also includes a control valve located in front of the active nozzle of the injector, and a one-way valve located on the liquid outlet side of the gas-liquid separator and on the cold end tube of the vortex tube.

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