Control method and device of variable-capacity air conditioning system, variable-capacity air conditioning system and medium

Abstract

The invention relates to the technical field of refrigeration control, and discloses a control method and device of a variable-capacity air conditioning system, the variable-capacity air conditioning system and a medium. The control method comprises the steps that operation parameters of the air conditioner are obtained every preset duration; the effective volume of the drying bottle and / or the gas-liquid separator is adjusted according to the operation parameters until the adjusted compressor performance is within a preset range; the effective volume is a volume through which a refrigerant can flow; the compressor performance comprises at least one of the pressure ratio, the exhaust heat degree and the exhaust pressure. Therefore, the volume-variable drying bottle and / or the gas-liquid separator are / is additionally arranged in the air conditioning system, and the effective volume of the drying bottle and / or the gas-liquid separator is adjusted according to the operating parameters of the air conditioner, so that the circulation volume of the refrigerant in the refrigerant circulation pipeline can be changed; the quantity of the refrigerant in the refrigerant circulating pipeline meets the requirement condition of the current air conditioner system for the refrigerant, so that the system pressure of the air conditioner system is kept in a good state for a long time, and the air conditioner system can be in the good working efficiency for a long time.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a control method and device for a variable volume air conditioning system, a variable volume air conditioning system, and a medium. Background Art

[0002] At present, the overall volume of the air-conditioning system is in a fixed state. However, in actual use, due to changes in ambient temperature or load, the load, high pressure, low pressure, refrigerant temperature, supercooling, etc. of the air-conditioning system will change, causing the air-conditioning system to deviate from the optimal working state. For example: when the system is in a low-load condition, the refrigerant circulation volume of the air-conditioning system is reduced, which increases the supercooling. Excessive supercooling will reduce the heat exchange efficiency of the condenser, thereby affecting the efficiency of the air-conditioning system. Therefore, how to enable the air-conditioning system to maintain optimal working efficiency for a longer period of time needs to be solved urgently.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0005] The embodiments of the present application provide a control method and device for a variable volume air conditioning system, a variable volume air conditioning system, and a medium, so that the air conditioning system can maintain a better working efficiency for a longer period of time.

[0006] The embodiment of the present application provides a control method for a variable volume air conditioning system, wherein the variable volume air conditioning system includes a variable volume drying bottle and / or a variable volume gas-liquid separator. The control method includes: obtaining the operating parameters of the air conditioner at preset time intervals; adjusting the effective volume of the drying bottle and / or the gas-liquid separator according to the operating parameters until the adjusted compressor performance is within a preset range; the effective volume is the volume through which the refrigerant can flow; the compressor performance includes: at least one of the compression ratio, exhaust heat and exhaust pressure.

[0007] The embodiments of the present application can change the circulation amount of refrigerant in the refrigerant circulation pipeline by adding a variable-volume drying bottle and / or a gas-liquid separator to the air-conditioning system and adjusting the effective volume of the drying bottle and / or the gas-liquid separator according to the operating parameters of the air-conditioning, so that the amount of refrigerant in the refrigerant circulation pipeline meets the current demand for refrigerant of the air-conditioning system, thereby maintaining the system pressure of the air-conditioning system in a better state for a longer period of time, so that the air-conditioning system can be in a better working efficiency for a longer period of time.

[0008] Furthermore, the operating parameters include: compressor speed; adjusting the effective volume of the drying bottle and / or the gas-liquid separator according to the operating parameters, including: when the compressor speed obtained at the current moment increases compared with the compressor speed obtained at the previous moment, controlling the effective volume of the drying bottle and / or the gas-liquid separator to increase; when the compressor speed obtained at the current moment decreases compared with the compressor speed obtained at the previous moment, controlling the effective volume of the drying bottle and / or the gas-liquid separator to decrease.

[0009] The present application has found that, under the same compressor speed, the circulation amount of different refrigerants in the refrigerant circulation pipeline has different effects on the system pressure of the variable volume air conditioning system, thereby making the working efficiency of the air conditioning system different. Therefore, by adjusting the effective volume of the drying bottle and / or the gas-liquid separator through the compressor speed, the circulation amount of the refrigerant in the refrigerant circulation pipeline changes with the compressor speed, so as to maintain the system pressure of the variable volume air conditioning system in a better state, so that the air conditioning system can be in a better working efficiency for a longer time.

[0010] Furthermore, the operating parameters include: system high pressure; adjusting the effective volume of the drying bottle and / or the gas-liquid separator according to the operating parameters, including: when the system high pressure obtained at a current moment increases compared with the system high pressure obtained at a previous moment, controlling the effective volume of the drying bottle and / or the gas-liquid separator to increase; when the system high pressure obtained at a current moment decreases compared with the system high pressure obtained at a previous moment, controlling the effective volume of the drying bottle and / or the gas-liquid separator to decrease.

[0011] The present application has found that, under the condition of the same compressor speed, the circulation amount of different refrigerants in the refrigerant circulation pipeline has different effects on the system pressure of the variable volume air conditioning system, thereby making the working efficiency of the air conditioning system different. The change of the system high pressure is consistent with the changing trend of the compressor speed. Therefore, by adjusting the effective volume of the drying bottle and / or the gas-liquid separator through the system high pressure, the circulation amount of the refrigerant in the refrigerant circulation pipeline changes with the system high pressure, so as to maintain the system pressure of the variable volume air conditioning system in a better state, so that the air conditioning system can be in a better working efficiency for a longer time.

[0012] Furthermore, the operating parameters include: system low pressure; adjusting the effective volume of the drying bottle and / or the gas-liquid separator according to the operating parameters, including: when the system low pressure obtained at the current moment is reduced compared with the system low pressure obtained at the previous moment, controlling the effective volume of the drying bottle and / or the gas-liquid separator to increase; when the system low pressure obtained at the current moment is increased compared with the system low pressure obtained at the previous moment, controlling the effective volume of the drying bottle and / or the gas-liquid separator to decrease.

[0013] The present application has found that, under the condition of the same compressor speed, the circulation amount of different refrigerants in the refrigerant circulation pipeline has different effects on the system pressure of the variable volume air conditioning system, thereby making the working efficiency of the air conditioning system different. The change of the system low pressure is opposite to the change trend of the compressor speed. Therefore, by adjusting the effective volume of the drying bottle and / or the gas-liquid separator through the system low pressure, the circulation amount of the refrigerant in the refrigerant circulation pipeline changes with the system low pressure, so as to maintain the system pressure of the variable volume air conditioning system in a better state, so that the air conditioning system can be in a better working efficiency for a longer time.

[0014] Furthermore, the operating parameters include: exhaust temperature; adjusting the effective volume of the drying bottle and / or the gas-liquid separator according to the operating parameters, including: controlling the effective volume of the drying bottle and / or the gas-liquid separator to increase when the exhaust temperature obtained at a current moment is higher than the exhaust temperature obtained at a previous moment; and controlling the effective volume of the drying bottle and / or the gas-liquid separator to decrease when the exhaust temperature obtained at a current moment is lower than the exhaust temperature obtained at a previous moment.

[0015] The present application found that, under the same exhaust temperature, the circulation amount of different refrigerants in the refrigerant circulation pipeline has different effects on the system pressure of the variable volume air conditioning system, thereby making the working efficiency of the air conditioning system different. Therefore, by adjusting the effective volume of the drying bottle and / or the gas-liquid separator by the exhaust temperature, the circulation amount of the refrigerant in the refrigerant circulation pipeline changes with the exhaust temperature, so as to maintain the system pressure of the variable volume air conditioning system in a better state, so that the air conditioning system can be in a better working efficiency for a longer time.

[0016] Furthermore, before obtaining the operating parameters of the air conditioner at preset time intervals, the control method of the variable volume air conditioning system also includes: obtaining the working mode of the air conditioner; searching for an initial volume value corresponding to the working mode in a preset database; and adjusting the effective volume of the drying bottle and / or the gas-liquid separator to the initial volume value.

[0017] In the above embodiment, the air conditioner requires different amounts of refrigerant in different working modes. An approximate initial volume value is set in advance according to the amount of refrigerant in different working modes. When in use, the effective volume of the drying bottle and / or the gas-liquid separator is adjusted to the corresponding initial volume value according to the working mode, so as to make the compressor performance within the preset range more quickly later.

[0018] Furthermore, the variable volume air conditioning system includes a compressor, and the gas-liquid separator includes a heating component. Before obtaining the working mode of the air conditioner, the method also includes: determining the startup state of the compressor; when the startup state is a cold machine start, triggering the heating component to turn on until the internal temperature of the gas-liquid separator reaches a preset temperature.

[0019] In the above embodiment, before the compressor is started, the gas-liquid separator is heated by the heating component, which can improve the oil-gas solubility, so that the refrigerant and oil can flow smoothly into the compressor to lubricate the compressor, thereby increasing the life of the compressor.

[0020] Furthermore, the variable volume air conditioning system includes: a compressor, a condenser, a throttle valve, an evaporator and a gas-liquid separator; the compressor is connected to the condenser, the condenser is connected to the evaporator through the throttle valve, and the evaporator is connected to the compressor through the gas-liquid separator; after the compressor performance is within a preset range, the control method of the variable volume air conditioning system also includes: obtaining a shutdown instruction; after receiving the shutdown instruction for a preset duration, adjusting the effective volume of the drying bottle and / or the gas-liquid separator to a maximum, and adjusting the valve opening of the throttle valve to a maximum.

[0021] In the above embodiment, by rapidly increasing the effective volume of the gas-liquid separator to the maximum in a short time, and then adjusting the throttle valve opening between the condenser and the evaporator to the maximum, the system high pressure and the system low pressure can be reduced, the system high and low pressures can be quickly balanced, and the load of the secondary startup of the compressor can be reduced.

[0022] An embodiment of the present application provides a variable volume air-conditioning system, which includes: a compressor, a condenser, a throttle valve, and an evaporator; the compressor is connected to the condenser, and the condenser is connected to the evaporator through the throttle valve; the variable volume air-conditioning system includes: a first variable volume unit, the first variable volume unit includes a gas-liquid separator with a variable volume; the evaporator is connected to the compressor through the first variable volume unit; and / or, a second variable volume unit, the second variable volume unit includes a drying bottle with a variable volume; the condenser is connected to the throttle valve through the second variable volume unit.

[0023] In the above embodiment, by providing a variable-volume gas-liquid separator and a variable-volume drying bottle in the variable-volume air-conditioning system, the overall volume of the air-conditioning system can be adjusted according to the operating parameters, thereby facilitating the adjustment of the air-conditioning system to keep it at a better working efficiency for a longer period of time, thereby maintaining the efficiency of the variable-volume air-conditioning system.

[0024] Furthermore, the first variable volume unit includes: a gas-liquid separator with a variable volume, the evaporator is connected to the compressor via the gas-liquid separator; and a first driving component for controlled adjustment of the effective volume of the gas-liquid separator with a variable volume.

[0025] In the above embodiment, the effective volume of the variable-volume gas-liquid separator is controlled and adjusted by the first driving component so that there will not be too much refrigerant accumulated in the gas-liquid separator to balance the pressure on the high-pressure side of the air-conditioning system, so that the efficiency of the air-conditioning system is less affected to maintain the efficiency of the air-conditioning system.

[0026] Furthermore, the second variable volume unit includes: a variable volume drying bottle, the condenser is connected to the throttle valve via the drying bottle; and a second driving component for controlled adjustment of the effective volume of the variable volume drying bottle.

[0027] In the above embodiment, the effective volume of the variable-volume drying bottle is controlled and adjusted by the second driving component so that there will not be too much refrigerant accumulated in the drying bottle to balance the pressure on the high-pressure side of the air-conditioning system, so that the efficiency of the air-conditioning system is less affected to maintain the efficiency of the air-conditioning system.

[0028] Furthermore, the variable volume air conditioning system also includes: an oil collecting tank, which is connected to the first variable volume unit and / or the second variable volume unit; the oil collecting tank is used to store refrigerant oil and provide the refrigerant oil to the first variable volume unit and / or the second variable volume unit; the first variable volume unit uses the refrigerant oil to change the volume of the variable volume gas-liquid separator; the second variable volume unit uses the refrigerant oil to change the volume of the variable volume drying bottle.

[0029] In the above embodiment, considering that refrigerant oil is easy to obtain and refrigerant oil may originally exist in the refrigerant circulation pipeline, the refrigerant oil is used to transform the volume of the gas-liquid separator and / or the drying bottle through the first variable capacity unit and the second variable capacity unit. Even if the first variable capacity unit and the second variable capacity unit are abnormal and cause the refrigerant oil to leak into the refrigerant circulation pipeline, it will not cause excessive damage to the variable capacity air-conditioning system, thereby improving the reliability of the variable capacity air-conditioning system.

[0030] Furthermore, the variable volume air conditioning system also includes: an oil separator, the inlet of the oil separator is connected to the exhaust port of the compressor; the exhaust port of the oil separator is connected to the condenser, and the oil discharge port of the oil separator is connected to the oil return port of the compressor; the oil separator is used to separate the refrigerant oil carried in the refrigerant discharged from the exhaust port of the compressor.

[0031] In the above embodiment, by adding an oil separator to separate the refrigerant oil carried in the refrigerant discharged from the exhaust port of the compressor, the amount of refrigerant oil carried in the refrigerant flowing through the condenser and the evaporator can be reduced, thereby reducing the accumulation of refrigerant oil on the condenser and the evaporator, thereby improving the heat exchange performance of the condenser and the evaporator.

[0032] Furthermore, the oil discharge port of the oil separator is connected to the oil return port of the compressor through the oil collecting tank; the oil collecting tank is also used to store the refrigeration oil separated by the oil separator.

[0033] In the above embodiment, the refrigerant oil separated by the oil separator is collected by the oil collecting bin, and the stored refrigerant oil is provided by the oil collecting bin to the first variable capacity unit and the second variable capacity unit for variable capacity, thereby realizing the reuse of the refrigerant oil and saving the cost of the variable capacity air conditioning system.

[0034] Furthermore, the variable volume air conditioning system further comprises: a temperature control device, which is arranged between the oil separator and the compressor and is used to control the refrigeration oil flowing into the compressor to a set temperature.

[0035] In the above embodiments, it is taken into consideration that the temperature of the refrigerant oil flowing into the compressor from the oil separator may affect the performance of the compressor. For example, when the oil temperature is too high, the cooling effect on the compressor will decrease, causing the bearing temperature to increase, thereby affecting the performance of the compressor. When the oil temperature is too low, the viscosity of the refrigerant oil will increase, resulting in increased oil film lubrication friction and increased bearing power consumption, thereby affecting the performance of the compressor. By providing a temperature control device to set the temperature of the refrigerant oil flowing into the compressor, it is possible to facilitate the compressor to be in a better performance.

[0036] Furthermore, the variable volume air conditioning system also includes a control module, which is connected to the gas-liquid separator and / or the drying bottle and is used to execute the above-mentioned control method of the variable volume air conditioning system.

[0037] An embodiment of the present application provides a control device for a variable volume air conditioning system, wherein the variable volume air conditioning system includes a variable volume drying bottle and / or a variable volume gas-liquid separator; the device includes: an acquisition module, used to obtain the operating parameters of the air conditioner at preset time intervals; an adjustment module, used to adjust the effective volume of the drying bottle and / or the gas-liquid separator according to the operating parameters until the adjusted compressor performance is within a preset range; the effective volume is the volume through which the refrigerant can flow; the compressor performance includes: at least one of: compression ratio, exhaust heat and exhaust pressure.

[0038] In some embodiments, the storage medium stores computer executable instructions, and when the computer executable instructions are called and executed by the processor, the computer executable instructions enable the processor to implement the control method of the above-mentioned variable volume air conditioning system.

[0039] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] One or more embodiments are exemplarily described by corresponding drawings, and these exemplary descriptions and drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are considered similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0041] Figure 1 is a connection diagram of a first variable volume air conditioning system provided in an embodiment of the present application;

[0042] Figure 2 is a connection diagram of a second variable volume air conditioning system provided in an embodiment of the present application;

[0043] Figure 3 is a connection diagram of a third variable volume air conditioning system provided in an embodiment of the present application;

[0044] Figure 4 is a connection diagram of a fourth variable volume air conditioning system provided in an embodiment of the present application;

[0045] Figure 5 is a connection diagram of a fifth variable volume air conditioning system provided in an embodiment of the present application;

[0046] Figure 6 is a connection diagram of a sixth variable volume air conditioning system provided in an embodiment of the present application;

[0047] Figure 7 is a connection diagram of the seventh variable volume air conditioning system provided in the embodiment of the present application;

[0048] Figure 8is a connection diagram of an eighth variable volume air conditioning system provided in an embodiment of the present application;

[0049] Fig. 9 is a connection diagram of a ninth variable volume air conditioning system provided in an embodiment of the present application;

[0050] Fig.10 is a schematic diagram of a control method for a variable volume air conditioning system provided in an embodiment of the present application;

[0051] Fig.11 It is a schematic diagram of a control device for a variable volume air conditioning system provided in an embodiment of the present application.

[0052] Reference numerals:

[0053] 10: compressor; 20: condenser; 30: throttle valve; 40: evaporator; 50: first variable capacity unit; 51: gas-liquid separator; 52: first control valve; 53: first oil pump; 54: second control valve; 55: third control valve; 56: second oil pump; 60: second variable capacity unit; 61: drying bottle; 62: fourth control valve; 63: third oil pump; 64: fifth control valve; 65: sixth control valve; 66: seventh control valve; 67: eighth control valve; 68: second motor; 69: second screw; 70: second threaded base; 71: second memory alloy; 72: second variable capacity component; 80: fourth oil pump; 90: oil separator; 100: ninth control valve; 110: temperature control device; 120: temperature sensor; 130: pressure sensor; 140: oil circulation meter; 150: oil collection bin; 160: acquisition module; 170: adjustment module. DETAILED DESCRIPTION

[0054] In order to be able to understand the features and technical contents of the embodiments of the present application in more detail, the implementation of the embodiments of the present application is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0055] The terms "first", "second", etc. in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0056] Unless otherwise stated, the term "plurality" means two or more.

[0057] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0058] Embodiment 1

[0059] Combination Figures 1 to 9 As shown, a variable volume air conditioning system is provided in an embodiment of the present application, comprising: a compressor 10, a condenser 20, a throttle valve 30, and an evaporator 40. The compressor 10 is connected to the condenser 20, and the condenser 20 is connected to the evaporator 40 through the throttle valve 30. At the same time, the variable volume air conditioning system also includes: a first variable volume unit 50 and / or a second variable volume unit 60. The first variable volume unit 50 includes a gas-liquid separator 51 with a variable volume, and the evaporator 40 is connected to the compressor 10 through the first variable volume unit 50. The second variable volume unit 60 includes a drying bottle 61 with a variable volume, and the condenser 20 is connected to the throttle valve 30 through the second variable volume unit 60.

[0060] In order to realize the variable volume of the gas-liquid separator 51 and the drying bottle 61, a first variable volume component is provided in the gas-liquid separator 51, and a second variable volume component 72 is provided in the drying bottle 61. The first variable volume component is used to divide the gas-liquid separator 51 into a first variable volume chamber and a second variable volume chamber, and the first variable volume component moves in the gas-liquid separator 51 to change the effective volume of the gas-liquid separator 51. The second variable volume component 72 is used to divide the drying bottle 61 into a third variable volume chamber and a fourth variable volume chamber, and the second variable volume component 72 moves in the drying bottle 61 to change the effective volume of the drying bottle 61. Exemplarily, the first variable volume component and the second variable volume component 72 are both pistons. The first variable volume chamber and the third variable volume chamber are used for the refrigerant to flow through.

[0061] In some embodiments, the first variable volume unit 50 includes: a gas-liquid separator 51 with variable volume and a first drive assembly. The evaporator 40 is connected to the compressor 10 via the gas-liquid separator 51; and the first drive assembly is used to control and adjust the effective volume of the gas-liquid separator 51 with variable volume.

[0062] Combination Figure 2 and Figure 4As shown, in an optional manner of the above embodiment, the first drive assembly may include: an oil collecting bin 150, a first control valve 52 and a first oil pump 53. The oil collecting bin 150 is used to store refrigerant oil. The first control valve 52 disposed between the oil collecting bin 150 and the gas-liquid separator 51 is used to control the refrigerant oil to flow into and out of the gas-liquid separator 51, so as to change the volume of the chamber in the gas-liquid separator 51 through which the refrigerant flows. The first oil pump 53 disposed between the oil collecting bin 150 and the first control valve 52 is used to pressurize the refrigerant oil.

[0063] Exemplarily, the first control valve 52 is used to control the flow of refrigeration oil into and out of the second variable volume chamber of the gas-liquid separator 51 to change the volume of the chamber in the gas-liquid separator 51 through which the refrigerant flows.

[0064] Combination Figures 6 to 9 As shown, in another optional mode of the above embodiment, the first drive component may include: an oil collecting bin 150, a second control valve 54, a third control valve 55 and a first oil pump 53. Among them, the oil collecting bin 150 is used to store refrigerant oil. The second control valve 54 arranged between the oil collecting bin 150 and the gas-liquid separator 51 is used to control the refrigerant oil to flow into the gas-liquid separator 51. The third control valve 55 arranged between the gas-liquid separator 51 and the compressor 10 is used to control the refrigerant oil to flow out of the gas-liquid separator 51 and enter the compressor 10. The first oil pump 53 arranged between the oil collecting bin 150 and the second control valve 54 is used to pressurize the refrigerant oil. In this way, the flow rate of the refrigerant oil flowing into the variable volume gas-liquid separator 51 can be changed by the second control valve 54 and the third control valve 55 to change the volume of the chamber in the gas-liquid separator 51 through which the refrigerant flows.

[0065] Combination Figures 6 to 9 As shown, in the above optional manner, the first drive assembly may further include: a second oil pump 56 , disposed between the gas-liquid separator 51 and the third control valve 55 , for pressurizing the refrigeration oil flowing out of the gas-liquid separator 51 .

[0066] Exemplarily, the second control valve 54 is used to control the flow of refrigerant oil into the second variable volume chamber of the gas-liquid separator 51, and the third control valve 55 is used to control the flow of refrigerant oil out of the second variable volume chamber of the gas-liquid separator 51 and into the compressor 10, so as to change the volume of the chamber in the gas-liquid separator 51 through which the refrigerant flows.

[0067] It can be understood that the first variable volume component is floated on the liquid surface of the refrigerant oil in the second variable volume chamber, and the first variable volume component can be driven to move as the liquid level changes. When the refrigerant oil flows into the second variable volume chamber of the gas-liquid separator 51, the liquid will increase accordingly, driving the first variable volume component to move upward, thereby compressing the volume of the first variable volume chamber, so that the volume of the first variable volume chamber becomes smaller. When the refrigerant oil flows out of the second variable volume chamber of the gas-liquid separator 51, the liquid will decrease accordingly, driving the first variable volume component to move downward, thereby increasing the volume of the first variable volume chamber, so that the volume of the first variable volume chamber becomes larger. Correspondingly, when the first drive component includes the first control valve 52, the refrigerant oil is controlled to flow into the second variable volume chamber of the gas-liquid separator 51 by the first control valve 52 to increase the effective volume of the gas-liquid separator 51; the refrigerant oil is controlled to flow out of the second variable volume chamber of the gas-liquid separator 51 by the first control valve 52 to reduce the effective volume of the gas-liquid separator 51. When the first drive component includes a second control valve 54 and a third control valve 55, the refrigerant oil is caused to flow into the second variable volume chamber of the gas-liquid separator 51 by controlling the second control valve 54 to increase the effective volume of the gas-liquid separator 51; and the refrigerant oil is caused to flow out of the second variable volume chamber of the gas-liquid separator 51 by controlling the third control valve 55 to reduce the effective volume of the gas-liquid separator 51.

[0068] In another optional mode of the above embodiment, the first driving assembly may include: a first threaded base, a first screw and a first motor. The first threaded base is connected to the first variable volume assembly, the first threaded base is cooperatively connected to the first screw, and the first screw is connected to the first motor. The first motor is used to drive the first screw to rotate to drive the first variable volume assembly to move, so as to change the volume of the chamber in the gas-liquid separator 51 through which the refrigerant flows.

[0069] Wherein, the first driving component is arranged in the second variable volume chamber.

[0070] It can be understood that the motor drives the first variable volume component to move downward to increase the volume of the first variable volume chamber; the motor drives the first variable volume component to move upward to reduce the volume of the first variable volume chamber. In the case where the first drive component includes a first threaded base, a first screw and a first motor, the first motor is driven to rotate the first screw in a positive direction to increase the effective volume of the gas-liquid separator 51; the first motor is driven to rotate the first screw in a reverse direction to reduce the effective volume of the gas-liquid separator 51.

[0071] In another optional manner of the above embodiment, the first driving component may include: a first memory alloy. One end of the first memory alloy is connected to the bottom of the second variable volume chamber, and the other end of the first memory alloy is connected to the first variable volume component; the first memory alloy is controlled by the heating temperature and the pressure in the first variable volume chamber to produce deformation to drive the first variable volume component to move.

[0072] Combination Figure 3 and Figure 4 As shown, in an optional manner of the above embodiment, the second drive assembly may include: an oil collecting bin 150, a fourth control valve 62 and a third oil pump 63. The oil collecting bin 150 is used to store refrigerant oil. The fourth control valve 62 disposed between the oil collecting bin 150 and the drying bottle 61 is used to control the refrigerant oil to flow into and out of the drying bottle 61, so as to change the volume of the chamber in the drying bottle 61 through which the refrigerant flows. The third oil pump 63 disposed between the oil collecting bin 150 and the fourth control valve 62 is used to pressurize the refrigerant oil.

[0073] Exemplarily, the fourth control valve 62 is used to control the flow of refrigerant oil into and out of the fourth variable volume chamber of the drying bottle 61 to change the volume of the chamber in the drying bottle 61 through which the refrigerant flows.

[0074] Combination Figure 6 As shown, in another optional mode of the above embodiment, the second drive component may include: an oil collecting bin 150, a fifth control valve 64, a sixth control valve 65 and a third oil pump 63. Among them, the oil collecting bin 150 is used to store refrigerant oil. The fifth control valve 64 arranged between the oil collecting bin 150 and the drying bottle 61 is used to control the refrigerant oil to flow into the drying bottle 61. The sixth control valve 65 arranged between the drying bottle 61 and the compressor 10 is used to control the refrigerant oil to flow out of the drying bottle 61 and enter the compressor 10. The third oil pump 63 arranged between the oil collecting bin 150 and the fifth control valve 64 is used to pressurize the refrigerant oil. In this way, the fifth control valve 64 and the sixth control valve 65 can be used to change the flow rate of the refrigerant oil flowing into the variable volume drying bottle 61 to change the volume of the chamber in the drying bottle 61 through which the refrigerant flows.

[0075] Exemplarily, the fifth control valve 64 is used to control the flow of refrigerant oil into the fourth variable volume chamber of the dry bottle 61, and the sixth control valve 65 is used to control the flow of refrigerant oil out of the fourth variable volume chamber of the dry bottle 61 and into the compressor 10, so as to change the volume of the chamber in the dry bottle 61 through which the refrigerant flows.

[0076] Similarly, combined Figure 5As shown, when the second drive assembly includes the fourth control valve 62, the fourth control valve 62 controls the refrigerant oil to flow into the fourth variable volume chamber of the drying bottle 61 to increase the effective volume of the drying bottle 61; the fourth control valve 62 controls the refrigerant oil to flow out of the fourth variable volume chamber of the drying bottle 61 to reduce the effective volume of the drying bottle 61. Figure 6 As shown, in the case where the second drive assembly includes a fifth control valve 64 and a sixth control valve 65, the fifth control valve 64 is controlled to allow the refrigerant oil to flow into the fourth variable volume chamber of the drying bottle 61 to increase the effective volume of the drying bottle 61; and the sixth control valve 65 is controlled to allow the refrigerant oil to flow out of the fourth variable volume chamber of the drying bottle 61 to reduce the effective volume of the drying bottle 61.

[0077] In some embodiments, the first drive assembly and the second drive assembly can share an oil pump. Figure 5 As shown, the oil collecting tank 150 is connected to the fourth oil pump 80, the fourth oil pump 80 is connected to the variable volume gas-liquid separator 51 through the first control valve 52, and the fourth oil pump 80 is connected to the variable volume drying bottle 61 through the fourth control valve 62. Figure 6 As shown, the oil collecting tank 150 is connected to the fourth oil pump 80 , the fourth oil pump 80 is connected to the variable volume gas-liquid separator 51 through the second control valve 54 , and the fourth oil pump 80 is connected to the variable volume drying bottle 61 through the fifth control valve 64 .

[0078] Combination Figure 7 As shown, in another optional manner of the above embodiment, the second drive assembly may include: a seventh control valve 66 and an eighth control valve 67. The seventh control valve 66 disposed between the compressor 10 and the variable volume drying bottle 61 is used to control the refrigerant discharged from the compressor 10 to flow into the drying bottle 61. The eighth control valve 67 disposed between the drying bottle 61 and the compressor 10 is used to control the refrigerant discharged from the compressor 10 to flow out of the drying bottle 61 and enter the air intake port of the compressor 10.

[0079] In this way, when the gas is introduced into the second variable volume chamber, the introduced gas will generate a thrust on the second variable volume component 72, thereby realizing the movement of the second variable volume component 72. Specifically, when the second driving component includes the seventh control valve 66 and the eighth control valve 67, the seventh control valve 66 is controlled to make the gaseous refrigerant flow into the fourth variable volume chamber of the drying bottle 61 to increase the effective volume of the drying bottle 61; the eighth control valve 67 is controlled to make the gaseous refrigerant flow out of the fourth variable volume chamber of the drying bottle 61 to reduce the effective volume of the drying bottle 61.

[0080] Combination Figure 8As shown, in another optional manner of the above embodiment, the second driving assembly may include: a second threaded base 70, a second screw 69 and a second motor 68. The second threaded base 70 is connected to the second variable volume assembly 72, the second threaded base 70 is cooperatively connected to the second screw 69, and the second screw 69 is connected to the second motor 68; the second motor 68 is used to drive the second screw 69 to rotate to drive the second variable volume assembly 72 to move, so as to change the volume of the chamber in the drying bottle 61 through which the refrigerant flows.

[0081] Similarly, when the second driving assembly includes the second threaded base 70, the second screw 69 and the second motor 68, by driving the second motor 68, the second screw 69 is rotated in the forward direction to increase the effective volume of the drying bottle 61; by driving the second motor 68, the second screw 69 is rotated in the reverse direction to reduce the effective volume of the drying bottle 61.

[0082] Combination Fig. 9 As shown, in another optional manner of the above embodiment, the second driving component may include: a second memory alloy 71. One end of the second memory alloy 71 is connected to the bottom of the fourth variable volume chamber, and the other end of the second memory alloy 71 is connected to the second variable volume component 72; the second memory alloy 71 is controlled by the heating temperature and the pressure in the fourth variable volume chamber to produce deformation, so as to drive the second variable volume component 72 to move.

[0083] Combination Figures 6 to 9 As shown, in some embodiments, the variable volume air conditioning system further includes: an oil separator 90, which is disposed between the compressor 10 and the condenser 20, the inlet of the oil separator 90 is connected to the exhaust port of the compressor 10, the exhaust port of the oil separator 90 is connected to the condenser 20, and the oil discharge port of the oil separator 90 is connected to the oil return port of the compressor 10. The oil separator 90 is used to separate the refrigeration oil carried in the refrigerant discharged from the exhaust port of the compressor 10.

[0084] In some embodiments, the oil discharge port of the oil separator 90 is connected to the oil return port of the compressor 10 through the oil collecting tank 150 , and the oil collecting tank 150 is also used to store the refrigerant oil separated by the oil separator 90 .

[0085] In some embodiments, the variable volume air conditioning system further includes: a ninth control valve 100. The ninth control valve 100 is disposed between the oil separator 90 and the compressor 10, and is used to control the amount of refrigeration oil flowing into the compressor 10. Exemplarily, the ninth control valve 100 is disposed between the fourth oil pump 80 and the compressor 10.

[0086] In some embodiments, the variable volume air conditioning system further includes: a temperature control device 110, which is disposed between the oil separator 90 and the compressor 10, and is used to control the refrigerant oil flowing into the compressor 10 to a set temperature. Exemplarily, the temperature control device 110 is disposed between the fourth oil pump 80 and the ninth control valve 100.

[0087] In some embodiments, the variable volume air conditioning system further includes: a temperature sensor 120 disposed on a connecting pipe of the variable volume air conditioning system for measuring temperature. Exemplarily, the temperature sensor 120 is disposed on a pipe between the temperature control device 110 and the ninth control valve 100 .

[0088] In some embodiments, the variable volume air conditioning system further includes: a pressure sensor 130, which is arranged on the connecting pipe of the variable volume air conditioning system for measuring pressure. Exemplarily, there are two pressure sensors 130, one of which is arranged on the pipe between the gas-liquid separator 51 and the compressor 10; and the other pressure sensor 130 is arranged on the pipe between the compressor 10 and the oil separator 90.

[0089] In some embodiments, the variable volume air conditioning system further includes: an oil circulation meter 140 disposed on a connecting pipe of the variable volume air conditioning system for measuring an oil circulation rate. Exemplarily, the oil circulation meter 140 is disposed on a pipe between the ninth control valve 100 and the compressor 10 .

[0090] Embodiment 2

[0091] The present application provides a control method for a variable volume air conditioning system. The variable volume air conditioning system includes a variable volume drying bottle 61 and / or a variable volume gas-liquid separator 51. Fig.10 As shown, Fig.10 A flow chart of a control method for a variable volume air conditioning system provided in an embodiment of the present application includes:

[0092] Step S101, obtaining the operating parameters of the air conditioner at preset time intervals.

[0093] Among them, the engineer can set the specific value of the preset time according to usage requirements, for example: 5 seconds, 10 seconds, etc.

[0094] In some embodiments, the operating parameters of the air conditioner may be parameters that can be directly collected on the air conditioning system, such as compressor speed, system high pressure, system low pressure, exhaust temperature, intake temperature, etc.

[0095] It can be understood that the system high pressure can be the compressor exhaust pressure, or the pressure on the pipeline between the outlet of the compressor 10 and the throttle valve 30. The system low pressure can be the compressor suction pressure, or the pressure on the pipeline between the throttle valve 30 and the inlet of the compressor 10. The exhaust temperature is the temperature of the exhaust port of the compressor 10. The suction temperature is the temperature of the suction port of the compressor 10. Among them, the compressor speed can be directly read in the air conditioning system. The system high pressure and system low pressure can be measured by setting a pressure sensor. The exhaust temperature and suction temperature can be measured by setting a temperature sensor.

[0096] For example, the compressor speed, system high pressure, system low pressure, exhaust temperature, suction temperature and other operating parameters can be obtained every 5 seconds. For example, there is a 5S interval between time A and time B. The compressor speed, system high pressure, system low pressure, exhaust temperature, suction temperature and other operating parameters are obtained once at time A, and the compressor speed, system high pressure, system low pressure, exhaust temperature, suction temperature and other operating parameters are obtained once at time B.

[0097] It is worth noting that after the operating parameters are obtained, the operating parameters obtained for the last several times can be stored, so as to facilitate the subsequent viewing of changes in the operating parameters. Among them, at least the most recent two operating parameters can be stored.

[0098] Step S102, adjusting the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 according to the operating parameters until the adjusted compressor performance is within a preset range.

[0099] The effective volume is the volume through which the refrigerant can flow. The compressor performance includes: at least one of the compression ratio, exhaust heat and exhaust pressure.

[0100] In some embodiments, the pressure ratio can be obtained by calculating the compressor exhaust absolute pressure / compressor suction absolute pressure to obtain the pressure ratio. It can be understood that the compressor exhaust absolute pressure is the absolute value of the compressor exhaust pressure. The compressor suction absolute pressure is the absolute value of the compressor suction pressure.

[0101] In some embodiments, the exhaust heat can be obtained by calculating the exhaust temperature minus the saturation temperature corresponding to the compressor exhaust pressure. The saturation temperature corresponding to the compressor exhaust pressure can be found in a preset saturation temperature database. The saturation temperature database stores the corresponding relationship between the compressor exhaust pressure and the saturation temperature.

[0102] In some embodiments, the operating parameters may include: compressor speed. Step S102 may include: when the compressor speed obtained at the current moment increases compared to the compressor speed obtained at the previous moment, controlling the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to increase; when the compressor speed obtained at the current moment decreases compared to the compressor speed obtained at the previous moment, controlling the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to decrease.

[0103] For example, it is assumed that the variable volume air conditioning system uses a variable volume dryer bottle 61, and the dryer bottle 61 is changed in volume by refrigeration oil. The amount of oil filled in the dryer bottle is the volume of the refrigeration oil injected into the dryer bottle 61. The more the amount of oil filled in the dryer bottle, the smaller the effective volume of the dryer bottle 61. Combined with Table 1, Table 1 is a schematic table of the relationship between the volume change of the dryer bottle and the compressor performance. As shown in Table 1, when the amount of oil injected into the drying bottle is 120 ml (milliliters) and the speed of the compressor is 5000 rpm (revolutions per minute), the suction pressure of the compressor is 0.262 MAP (megapascals), the suction temperature of the compressor is 13.64°C (degrees Celsius), the exhaust pressure of the compressor is 1.027 MAP, the exhaust temperature is 66.62°C, the electric power of the compressor is 1592.3 W (watts), the heat exchange capacity is 5172.8 W, the refrigerant flow rate is 120.5 kg / h (kilograms per hour), the compressor energy efficiency ratio is 3.249, and the pressure ratio is 3.920. Thus, it can be seen from Table 1 that when the speed of the compressor remains unchanged, as the amount of oil injected into the drying bottle increases, the suction pressure of the compressor remains almost unchanged, but the exhaust pressure of the compressor will continue to increase, thereby reducing the energy efficiency ratio of the compressor. That is, the effective volume of the drying bottle 61 will affect the change of the exhaust pressure of the compressor, and thus affect the performance of the compressor. By adjusting the effective volume of the drying bottle through the compressor speed, the circulation amount of refrigerant in the refrigerant circulation pipeline changes with the compressor speed, which can maintain the system pressure of the variable volume air-conditioning system at a better state, so that the air-conditioning system can be in a better working efficiency for a longer time.

[0104]

[0105] Table 1

[0106] In the above embodiment, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to decrease, which may be that the effective volume of the drying bottle 61 and the gas-liquid separator 51 is controlled to decrease by B as a whole for every decrease in the compressor speed A. The effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to increase, which may be that the effective volume of the drying bottle 61 and the gas-liquid separator 51 is controlled to increase by B as a whole for every increase in the compressor speed A.

[0107] Exemplarily, assuming that the variable volume air conditioning system only has a variable volume drying bottle 61, and the effective volume of the drying bottle 61 ranges from 420 ml (milliliters) to 800 ml, the effective volume of the drying bottle 61 is controlled to decrease by 10% overall for every 1000 rpm (revolutions per minute) decrease in the compressor speed.

[0108] Optionally, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to increase. When the variable volume air conditioning system only has the variable volume drying bottle 61, only the effective volume of the drying bottle 61 can be controlled to increase, for example, the effective volume of the drying bottle 61 is controlled to increase by C. When the variable volume air conditioning system only has the variable volume gas-liquid separator 51, only the effective volume of the gas-liquid separator 51 is controlled to increase, for example, the effective volume of the gas-liquid separator 51 is controlled to increase by D. When the variable volume air conditioning system has the variable volume drying bottle 61 and the variable volume gas-liquid separator 51, the effective volume of the drying bottle 61 is controlled to increase, and the effective volume of the gas-liquid separator 51 is controlled to increase. For example, the effective volume of the drying bottle 61 is controlled to increase by E as a whole, and the effective volume of the gas-liquid separator 51 is controlled to increase by F as a whole.

[0109] Optionally, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to decrease. When the variable volume air conditioning system only has the variable volume drying bottle 61, only the effective volume of the drying bottle 61 can be controlled to decrease, for example, the effective volume of the drying bottle 61 is controlled to decrease by C. When the variable volume air conditioning system only has the variable volume gas-liquid separator 51, only the effective volume of the gas-liquid separator 51 is controlled to decrease, for example, the effective volume of the gas-liquid separator 51 is controlled to decrease by D. When the variable volume air conditioning system has the variable volume drying bottle 61 and the variable volume gas-liquid separator 51, the effective volume of the drying bottle 61 is controlled to decrease, and the effective volume of the gas-liquid separator 51 is controlled to decrease. For example, the effective volume of the drying bottle 61 is controlled to decrease by E, and the effective volume of the gas-liquid separator 51 is controlled to decrease by F.

[0110] In some embodiments, the operating parameters may include: system high pressure. Step S102 may include: when the system high pressure obtained at the current moment increases compared to the system high pressure obtained at the previous moment, controlling the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to increase; when the system high pressure obtained at the current moment decreases compared to the system high pressure obtained at the previous moment, controlling the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to decrease.

[0111] In some embodiments, the operating parameters include: system low pressure. Step S102 may include: when the system low pressure obtained at the current moment decreases compared to the system low pressure obtained at the previous moment, controlling the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to increase; when the system low pressure obtained at the current moment increases compared to the system low pressure obtained at the previous moment, controlling the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to decrease.

[0112] In some embodiments, the operating parameters include: exhaust temperature. Step S102 may include: when the exhaust temperature obtained at the current moment is higher than the exhaust temperature obtained at the previous moment, controlling the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to increase; when the exhaust temperature obtained at the current moment is lower than the exhaust temperature obtained at the previous moment, controlling the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to decrease.

[0113] Exemplarily, operating parameters such as compressor speed, system high pressure, system low pressure, exhaust temperature, and suction temperature are stored at time A. After a preset time, operating parameters such as compressor speed, system high pressure, system low pressure, exhaust temperature, and suction temperature are stored at time B. The operating parameters at the current time are compared with the operating parameters at the previous time, that is, the operating parameter values ​​obtained at time B are increased or decreased compared with the operating parameter values ​​obtained at time A.

[0114] It is understandable that, in the absence of conflicts, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 can be adjusted by combining various operating parameters. For example:

[0115] Example 1: The operating parameters include: compressor speed and system high pressure. Step S102 may include: when the compressor speed obtained at the current moment increases compared to the compressor speed obtained at the previous moment, and the system high pressure obtained at the current moment increases compared to the system high pressure obtained at the previous moment, controlling the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to increase. When the compressor speed obtained at the current moment decreases compared to the compressor speed obtained at the previous moment, and the system high pressure obtained at the current moment decreases compared to the system high pressure obtained at the previous moment, controlling the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to decrease.

[0116] Example 2: The operating parameters include: system low pressure and exhaust temperature. Step S102 may include: when the system low pressure obtained at the current moment decreases compared to the system low pressure obtained at the previous moment, and the exhaust temperature obtained at the current moment increases compared to the exhaust temperature obtained at the previous moment, controlling the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to increase. When the system low pressure obtained at the current moment increases compared to the system low pressure obtained at the previous moment, and the exhaust temperature obtained at the current moment decreases compared to the exhaust temperature obtained at the previous moment, controlling the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to decrease.

[0117] Example 3: The operating parameters include: compressor speed, system high pressure, system low pressure and exhaust temperature. Step S102 may include: when the compressor speed obtained at the current moment increases compared with the compressor speed obtained at the previous moment, the system high pressure obtained at the current moment increases compared with the system high pressure obtained at the previous moment, the system low pressure obtained at the current moment decreases compared with the system low pressure obtained at the previous moment, and the exhaust temperature obtained at the current moment increases compared with the exhaust temperature obtained at the previous moment, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to increase. When the compressor speed obtained at the current moment decreases compared with the compressor speed obtained at the previous moment, the system high pressure obtained at the current moment decreases compared with the system high pressure obtained at the previous moment, the system low pressure obtained at the current moment increases compared with the system low pressure obtained at the previous moment, and the exhaust temperature obtained at the current moment decreases compared with the exhaust temperature obtained at the previous moment, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to decrease.

[0118] Example 4: The system high pressure may be the compressor exhaust pressure, and the system low pressure may be the compressor suction pressure. The operating parameters include: system high pressure and system low pressure. Step S102 may include: calculating the compressor exhaust absolute pressure / compressor suction absolute pressure to obtain the pressure ratio. Calculate the pressure ratio minus the set optimal pressure ratio to obtain the pressure ratio difference; when the pressure ratio difference is greater than 0, calculate the pressure ratio difference multiplied by the preset ratio to obtain the volume ratio to be adjusted; control the overall effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to increase the volume ratio to be adjusted.

[0119] Exemplarily, when the pressure ratio increases by 1 compared to the set optimal pressure ratio, the total effective volume of the drying bottle 61 and the gas-liquid separator 51 is adjusted to increase by 10%.

[0120] In some embodiments, before obtaining the operating parameters of the air conditioner at preset time intervals, the control method of the variable volume air conditioning system also includes: obtaining the working mode of the air conditioner; searching for the initial volume value corresponding to the working mode in a preset database; and adjusting the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to the initial volume value.

[0121] Among them, the working modes of the air conditioner, for example: cooling mode, heating mode, etc.

[0122] The preset database stores the corresponding relationship between the working mode and the initial volume value. The preset database can be set by engineers based on experience.

[0123] In some embodiments, the gas-liquid separator 51 includes a heating component. Before obtaining the working mode of the air conditioner, the method further includes: determining the startup state of the compressor 10; when the startup state is a cold start, triggering the heating component to turn on until the internal temperature of the gas-liquid separator 51 reaches a preset temperature.

[0124] In an optional method of the above embodiment, the startup state can be determined in the following manner: obtain the system high pressure and system low pressure at the current moment; obtain the system pressure difference by subtracting the system low pressure from the system high pressure; when the system pressure difference is greater than or equal to the set pressure difference, determine the startup state as hot engine startup; when the system pressure difference is less than the set pressure difference, determine the startup state as cold engine startup.

[0125] Among them, engineers can set the pressure difference based on experience, for example: 300Kpa (kilopascals).

[0126] In another optional method of the above embodiment, the startup status can be determined in the following way: obtain the time difference between the last shutdown time of the variable-capacity air-conditioning system and the current startup time of the variable-capacity air-conditioning system; when the time difference is less than or equal to the preset time length, determine the startup status as hot machine startup; when the time difference is greater than the preset time length, determine the startup status as cold machine startup.

[0127] The engineer may set the preset duration based on experience, for example, 60 seconds.

[0128] It is understandable that the two optional methods can be combined if there is no conflict. For example, when the system pressure difference is greater than or equal to the set pressure difference and the time difference is less than or equal to the preset time, the startup state is determined to be a hot engine startup. When the system pressure difference is less than the set pressure difference and the time difference is greater than the preset time, the startup state is determined to be a cold engine startup.

[0129] In some embodiments, after the performance of the adjusted compressor is within a preset range, the control method of the variable volume air conditioning system further includes: obtaining a shutdown instruction; after receiving the shutdown instruction for a preset duration, adjusting the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to the maximum, and adjusting the valve opening of the throttle valve 30 to the maximum. In this way, the system high pressure and the system high pressure can be quickly balanced, reducing the load of the secondary startup of the compressor 10.

[0130] Embodiment 3

[0131] Based on the same inventive concept, the present application embodiment provides a control device for a variable volume air conditioning system, such as Fig.11 As shown, the control device of the variable volume air conditioning system includes: an acquisition module 160 and an adjustment module 170. The acquisition module 160 is used to obtain the operating parameters of the air conditioner at preset time intervals; the adjustment module 170 is used to adjust the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 according to the operating parameters until the adjusted compressor performance is within a preset range; the effective volume is the volume that the refrigerant can flow through; the compressor performance includes: at least one of the compression ratio, exhaust heat and exhaust pressure.

[0132] In some embodiments, the operating parameters include: compressor speed; the regulation module 170 is used to adjust the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 according to the operating parameters in the following manner: when the compressor 10 speed obtained at the current moment increases compared with the compressor speed obtained at the previous moment, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to increase; when the compressor 10 speed obtained at the current moment decreases compared with the compressor speed obtained at the previous moment, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to decrease.

[0133] In some embodiments, the operating parameters include: system high pressure; the adjustment module 170 is used to adjust the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 according to the operating parameters in the following manner: when the system high pressure obtained at the current moment increases compared with the system high pressure obtained at the previous moment, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to increase; when the system high pressure obtained at the current moment decreases compared with the system high pressure obtained at the previous moment, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to decrease.

[0134] In some embodiments, the operating parameters include: system low pressure; the regulating module 170 is used to adjust the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 according to the operating parameters in the following manner: when the system low pressure obtained at the current moment is reduced compared with the system low pressure obtained at the previous moment, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to increase; when the system low pressure obtained at the current moment is increased compared with the system low pressure obtained at the previous moment, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to decrease.

[0135] In some embodiments, the operating parameters include: exhaust temperature; the adjustment module 170 is used to adjust the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 according to the operating parameters in the following manner: when the exhaust temperature obtained at the current moment is higher than the exhaust temperature obtained at the previous moment, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to increase; when the exhaust temperature obtained at the current moment is lower than the exhaust temperature obtained at the previous moment, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is controlled to decrease.

[0136] In some embodiments, the adjustment module 170 is also used to obtain the working mode of the air conditioner before obtaining the operating parameters of the air conditioner at preset time intervals; search for the initial volume value corresponding to the working mode in a preset database; and adjust the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 to the initial volume value.

[0137] In some embodiments, the variable volume air conditioning system includes a compressor 10, the gas-liquid separator 51 includes a heating component, and the adjustment module 170 is also used to determine the startup state of the compressor 10 before obtaining the working mode of the air conditioner; when the startup state is a cold machine start, the heating component is triggered to turn on until the internal temperature of the gas-liquid separator 51 reaches a preset temperature.

[0138] In some embodiments, the variable volume air conditioning system includes: a compressor 10, a condenser 20, a throttle valve 30, an evaporator 40 and a gas-liquid separator 51; the compressor 10 is connected to the condenser 20, the condenser 20 is connected to the evaporator 40 through the throttle valve 30, and the evaporator 40 is connected to the compressor 10 through the gas-liquid separator 51. The adjustment module 170 is also used to obtain a shutdown instruction after the performance of the adjusted compressor is within a preset range; after receiving the preset duration of the shutdown instruction, the effective volume of the drying bottle 61 and / or the gas-liquid separator 51 is adjusted to the maximum, and the valve opening of the throttle valve 30 is adjusted to the maximum.

[0139] It can be understood that the various embodiments described in the second embodiment are also applicable to the third embodiment if there is no conflict. Based on the consideration of brevity of description, they will not be repeated here.

[0140] The technical solution of the embodiment of the present application can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method of the embodiment of the present application. The aforementioned storage medium can be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk, etc., which can store program codes, or a transient storage medium.

[0141] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0142] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. At the same time, the above embodiments can be combined with each other to form new embodiments without conflict.

Claims

1. A control method for a variable volume air conditioning system, characterized in that: The variable volume air conditioning system comprises: a variable volume drying bottle and / or a variable volume gas-liquid separator; the method comprises: Obtaining the operating parameters of the air conditioner at preset intervals; The effective volume of the drying bottle and / or the gas-liquid separator is adjusted according to the operating parameters until the adjusted compressor performance is within a preset range; the effective volume is the volume through which the refrigerant can flow; the compressor performance includes: at least one of the compression ratio, exhaust heat and exhaust pressure.

2. The method according to claim 1, characterized in that The operating parameters include: compressor speed; adjusting the effective volume of the drying bottle and / or the gas-liquid separator according to the operating parameters includes: When the compressor speed obtained at the current moment increases compared with the compressor speed obtained at the previous moment, controlling the effective volume of the drying bottle and / or the gas-liquid separator to increase; When the compressor speed obtained at the current moment is smaller than the compressor speed obtained at the previous moment, the effective volume of the drying bottle and / or the gas-liquid separator is controlled to be reduced.

3. The method according to claim 1, characterized in that The operating parameters include: system high pressure; adjusting the effective volume of the drying bottle and / or the gas-liquid separator according to the operating parameters includes: When the system high pressure obtained at the current moment increases compared with the system high pressure obtained at the previous moment, controlling the effective volume of the drying bottle and / or the gas-liquid separator to increase; When the system high pressure obtained at the current moment is lower than the system high pressure obtained at the previous moment, the effective volume of the drying bottle and / or the gas-liquid separator is controlled to be reduced.

4. The method according to claim 1, characterized in that: The operating parameters include: system low pressure; adjusting the effective volume of the drying bottle and / or the gas-liquid separator according to the operating parameters includes: When the system low pressure obtained at the current moment is lower than the system low pressure obtained at the previous moment, controlling the effective volume of the drying bottle and / or the gas-liquid separator to increase; When the system low pressure obtained at the current moment increases compared with the system low pressure obtained at the previous moment, the effective volume of the drying bottle and / or the gas-liquid separator is controlled to decrease.

5. The method according to claim 1, characterized in that The operating parameters include: exhaust temperature; adjusting the effective volume of the drying bottle and / or the gas-liquid separator according to the operating parameters includes: When the exhaust temperature obtained at the current moment is higher than the exhaust temperature obtained at the previous moment, controlling the effective volume of the drying bottle and / or the gas-liquid separator to increase; When the exhaust temperature acquired at the current moment is lower than the exhaust temperature acquired at the previous moment, the effective volume of the drying bottle and / or the gas-liquid separator is controlled to decrease.

6. The method according to claim 1, characterized in that Before obtaining the operating parameters of the air conditioner at preset time intervals, the method further includes: Get the working mode of the air conditioner; Searching for an initial volume value corresponding to the working mode in a preset database; The effective volume of the drying bottle and / or the gas-liquid separator is adjusted to the initial volume value.

7. The method according to claim 6, characterized in that The variable volume air conditioning system comprises: a compressor; the gas-liquid separator comprises a heating component, and before obtaining the working mode of the air conditioner, the method further comprises: determining a startup state of the compressor; When the startup state is a cold startup, the heating component is triggered to turn on until the internal temperature of the gas-liquid separator reaches a preset temperature.

8. The method according to any one of claims 1 to 7, characterized in that: The variable volume air conditioning system comprises: a compressor, a condenser, a throttle valve, an evaporator and a gas-liquid separator; the compressor is connected to the condenser, the condenser is connected to the evaporator through the throttle valve, and the evaporator is connected to the compressor through the gas-liquid separator; after the compressor performance is within a preset range, the method further comprises: Get shutdown instructions; After receiving the preset duration of the shutdown instruction, the effective volume of the drying bottle and / or the gas-liquid separator is adjusted to the maximum, and the valve opening of the throttle valve is adjusted to the maximum.

9. A variable volume air conditioning system, comprising: Compressor, condenser, throttle valve, evaporator; The compressor is connected to the condenser, and the condenser is connected to the evaporator through the throttle valve; characterized in that the variable volume air conditioning system comprises: a first variable capacity unit, wherein the first variable capacity unit comprises a gas-liquid separator with a variable volume; the evaporator is connected to the compressor via the first variable capacity unit; and / or, A second variable capacity unit, wherein the second variable capacity unit comprises a drying bottle with a variable volume; the condenser is connected to the throttle valve via the second variable capacity unit.

10. The variable volume air conditioning system according to claim 9, characterized in that: The first variable capacitance unit comprises: a gas-liquid separator with a variable volume, wherein the evaporator is connected to the compressor via the gas-liquid separator; The first driving component is used for controlling and adjusting the effective volume of the variable-volume gas-liquid separator.

11. The variable volume air conditioning system according to claim 9, characterized in that: The second variable capacitance unit comprises: A drying bottle with a variable volume, wherein the condenser is connected to the throttle valve via the drying bottle; The second driving assembly is used for controlling and adjusting the effective volume of the variable-volume drying bottle.

12. The variable volume air conditioning system according to claim 9, characterized in that: The variable volume air conditioning system also includes: An oil collecting bin connected to the first variable volume unit and / or the second variable volume unit; the oil collecting bin is used to store refrigerant oil and provide the refrigerant oil to the first variable volume unit and / or the second variable volume unit; the first variable volume unit uses the refrigerant oil to change the volume of the variable volume gas-liquid separator; the second variable volume unit uses the refrigerant oil to change the volume of the variable volume drying bottle.

13. The variable volume air conditioning system according to claim 12, characterized in that: The variable volume air conditioning system also includes: An oil separator, wherein the inlet of the oil separator is connected to the exhaust port of the compressor; the exhaust port of the oil separator is connected to the condenser, and the oil discharge port of the oil separator is connected to the oil return port of the compressor; the oil separator is used to separate the refrigeration oil carried in the refrigerant discharged from the exhaust port of the compressor.

14. The variable volume air conditioning system according to claim 13, characterized in that: The oil discharge port of the oil separator is connected to the oil return port of the compressor through the oil collecting tank; the oil collecting tank is also used to store the refrigeration oil separated by the oil separator.

15. The variable volume air conditioning system according to claim 13, characterized in that: The variable volume air conditioning system also includes: The temperature control device is arranged between the oil separator and the compressor, and is used to control the refrigeration oil flowing into the compressor to a set temperature.

16. The variable volume air conditioning system according to any one of claims 9 to 15, characterized in that: The variable volume air conditioning system further comprises: a control module connected to the gas-liquid separator and / or the drying bottle, and configured to execute the control method of the variable volume air conditioning system according to any one of claims 1 to 8.

17. A control device for a variable volume air conditioning system, characterized in that: The variable volume air conditioning system comprises: a variable volume drying bottle, and / or a variable volume gas-liquid separator; the device comprises: An acquisition module, used to acquire the operating parameters of the air conditioner at preset time intervals; The regulating module is used to adjust the effective volume of the drying bottle and / or the gas-liquid separator according to the operating parameters until the adjusted compressor performance is within a preset range; the effective volume is the volume through which the refrigerant can flow; the compressor performance includes: at least one of the compression ratio, exhaust heat and exhaust pressure.

18. A storage medium, characterized in that: The storage medium stores computer executable instructions. When the computer executable instructions are called and executed by the processor, the computer executable instructions enable the processor to implement the control method of the variable volume air conditioning system according to any one of claims 1 to 8.

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