Gas-liquid separator, air conditioning equipment and air conditioning equipment adjustment method

Abstract

The present invention provides a gas-liquid separator, air conditioning equipment and air conditioning equipment adjustment method. The gas-liquid separator includes a main body, an air intake pipe and a valve. The main body has a first cavity and a second cavity located in the first cavity, so that the gas-liquid mixture in the second cavity enters the first cavity through a preset outlet; the air intake pipe is arranged on the main body and is used to communicate with the air intake cavity of the compressor; the liquid separated from the gas-liquid mixture in the first cavity falls into the bottom of the first cavity, and the valve is used to float on the liquid surface of the liquid falling into the bottom of the first cavity; when the liquid level in the first cavity is equal to a first preset height, the valve is arranged at the preset outlet to block the preset outlet; the height of the air inlet of the air intake pipe is higher than the first preset height. The gas-liquid separator is used to solve the problem of complex structure of the air conditioning system in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to a gas-liquid separator, air conditioning equipment and an air conditioning equipment adjustment method. Background Art

[0002] In air conditioning systems, in order to ensure the reliability of compressor operation, it is necessary to avoid the intake air carrying a large amount of liquid refrigerant as much as possible, that is, the return liquid volume needs to be controlled.

[0003] For household air-conditioning systems, the main solution currently adopted is to use a gas-liquid separator. For the gas-liquid separator, it is necessary to ensure that the return liquid volume will not exceed the air intake port of the selected gas-liquid separator under extreme conditions; in order to ensure that the return liquid volume will not exceed the air intake port of the selected gas-liquid separator under extreme conditions, some air conditioners with large cooling capacity even need to add additional liquid storage tanks.

[0004] At present, a heat recovery device or a pressure difference detection device is usually added to determine the degree of liquid accumulation in the gas-liquid separator, and the degree of liquid accumulation in the gas-liquid separator is controlled accordingly. This method makes the structure of the air-conditioning system complex and the cost high. Summary of the invention

[0005] The main purpose of the present invention is to provide a gas-liquid separator, air conditioning equipment and air conditioning equipment adjustment method to solve the problem of complex structure of the air conditioning system in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a gas-liquid separator is provided, which includes: a main body, the main body having a first cavity and a second cavity located in the first cavity; the second cavity having a preset outlet, and the preset outlet is connected to the first cavity; an intake pipe, the intake pipe is passed through the main body and is used to be connected to the intake cavity of the compressor; a valve member, liquid separated from the gas-liquid mixture in the first cavity falls into the bottom of the first cavity, the valve member is arranged in the first cavity, and is used to float on the liquid surface of the liquid falling into the bottom of the first cavity; when the liquid level of the liquid in the first cavity is equal to a first preset height, the valve member is passed through the preset outlet to block the preset outlet; wherein the height of the air inlet of the intake pipe is higher than the first preset height.

[0007] Furthermore, when the liquid level in the first cavity is higher than the second preset height and lower than the first preset height, the valve member is disposed at the preset outlet to partially block the preset outlet.

[0008] Furthermore, the valve component includes a valve core, which is used to be installed at a preset outlet; the valve core is cylindrical, and the outer circumference of the cross section of the valve core perpendicular to its extension direction gradually decreases from bottom to top; when the liquid level of the liquid in the first cavity is higher than the second preset height and lower than the first preset height, the valve core partially blocks the preset outlet; when the liquid level of the liquid in the first cavity is equal to the first preset height, the valve core blocks the preset outlet.

[0009] Furthermore, the valve component also includes: a bracket, on which the valve core is arranged; and a valve seat, on which the bracket is arranged, and the valve seat is used to float on the liquid surface of the liquid in the first cavity.

[0010] Furthermore, the second cavity has a preset inlet, which is used to communicate with the outlet of the evaporator, so that the gas-liquid mixture flowing out of the outlet of the evaporator enters the second cavity through the preset inlet.

[0011] Furthermore, the preset outlet is arranged at the bottom of the second cavity, and the height of the air inlet of the air intake pipe is higher than the height of the preset outlet.

[0012] According to another aspect of the present invention, an air conditioning device is provided, which includes an evaporator, a compressor and the above-mentioned gas-liquid separator.

[0013] According to another aspect of the present invention, an air conditioning equipment adjustment method is provided, which is applicable to the above-mentioned air conditioning equipment, and the air conditioning equipment adjustment method comprises: calculating the initial operating frequency f0 of the compressor of the air conditioning equipment and the initial opening P0 of the valve port of the expansion valve of the air conditioning equipment according to the outdoor ambient temperature, the initial indoor ambient temperature, the set target temperature and the instantaneous exhaust volume of the air conditioning equipment; after the air conditioning equipment runs at the initial operating frequency f0 and the initial opening P0 for a first predetermined time, detecting the actual exhaust temperature t1 of the compressor; comparing the actual exhaust temperature t1 of the compressor with the corresponding preset exhaust temperature t2 of the compressor, and when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2, adjusting the operating frequency of the compressor and / or the opening of the valve port of the expansion valve; otherwise, no adjustment is required; wherein, △t1>△t2.

[0014] Furthermore, the calculation method of the preset exhaust temperature of the compressor includes: after the air-conditioning equipment runs for a preset time at a preset compressor operating frequency and a predetermined expansion valve opening, detecting the medium temperature in the evaporator of the air-conditioning equipment and the medium temperature in the condenser of the air-conditioning equipment; according to the medium temperature in the evaporator and the medium temperature in the condenser, respectively corresponding to the evaporation pressure and condensation pressure when the medium is in a saturated gas state; according to the evaporation pressure and the condensation pressure, calculating the preset exhaust temperature of the compressor.

[0015] Further, when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1; when the air-conditioning device is in cooling mode, when the outdoor ambient temperature is less than the first preset temperature T1; or when the air-conditioning device is in heating mode, when the outdoor ambient temperature is greater than the second preset temperature T2; when the absolute value of the difference between the indoor ambient temperature and the set target temperature is less than the third preset temperature difference △t3, the operating frequency of the compressor is reduced from the initial operating frequency f0 to the first operating frequency f1; after the compressor runs at the first operating frequency f1 for a second predetermined time, it is determined whether the difference between the actual exhaust temperature t1 of the compressor and the corresponding preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2.

[0016] Further, after the compressor runs at the first operating frequency f1 for a second predetermined time, and when the difference between the actual exhaust temperature t1 of the compressor and the corresponding preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2, the opening of the valve port of the expansion valve is controlled to increase from the initial opening P0 to the first opening P1.

[0017] Further, when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the compressor is less than the second preset temperature difference △t2; when the air-conditioning device is in cooling mode, when the outdoor ambient temperature is greater than the first preset temperature T1; or when the air-conditioning device is in heating mode, when the outdoor ambient temperature is less than the second preset temperature T2; when the absolute value of the difference between the indoor ambient temperature and the set target temperature is greater than the fourth preset temperature difference △t4, the operating frequency of the compressor is increased from the initial operating frequency f0 to the second operating frequency f2; after the compressor runs at the second operating frequency f2 for a third predetermined time, it is determined whether the difference between the actual exhaust temperature t1 of the compressor and the corresponding preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2.

[0018] Further, after the compressor runs at the second operating frequency f2 for a third predetermined time, and when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the corresponding compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2, the opening of the valve port of the expansion valve is controlled to decrease from the initial opening P0 to the second opening P2.

[0019] Applying the technical solution of the present invention, the gas-liquid separator includes a main body and an intake pipe, the main body having a first cavity and a second cavity located in the first cavity; the second cavity having a preset outlet, the preset outlet being connected to the first cavity, so that the gas-liquid mixture in the second cavity enters the first cavity through the preset outlet, the liquid in the gas-liquid mixture entering the first cavity falls to the bottom of the first cavity under the action of its own gravity, and the gas in the gas-liquid mixture flows to the upper part of the first cavity; the intake pipe is penetrated on the main body and is used to communicate with the intake cavity of the compressor, so that the separated gas of the gas-liquid mixture in the first cavity enters the intake pipe, flows along the tube cavity of the intake pipe, and then flows into the intake cavity of the compressor. The gas-liquid separator also includes a valve component, which is arranged in the first cavity and is used to float on the liquid surface of the liquid falling into the bottom of the first cavity; when the liquid level in the first cavity is equal to the first preset height, the valve component is penetrated at the preset outlet to form a shield for the preset outlet, at which time the preset outlet is closed, the second cavity is disconnected from the first cavity, and the gas-liquid mixture in the second cavity can no longer enter the first cavity; the height of the air inlet of the intake pipe is higher than the first preset height, so that it can avoid continued accumulation of liquid in the first cavity, and then avoid the liquid level height of the accumulated liquid in the first cavity exceeding the air inlet height of the intake pipe, thereby ensuring that the liquid level height of the accumulated liquid in the first cavity will not exceed the air inlet height of the intake pipe under any circumstances.

[0020] Compared with the prior art which judges and controls the degree of liquid accumulation in the gas-liquid separator by adding a heat recovery device or a pressure difference detection device, the present gas-liquid separator can prevent the liquid level of the accumulated liquid in the first cavity from exceeding the height of the air inlet of the intake pipe by cooperating between the valve member and the preset outlet of the second cavity. It can be seen that the present gas-liquid separator has a simple structure and a low cost, thereby simplifying the overall structure of the air-conditioning system having the present gas-liquid separator and reducing the cost, thereby solving the problem of complex structure of the air-conditioning system in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 A schematic structural diagram of an embodiment of a gas-liquid separator according to the present invention is shown;

[0023] Figure 2 Shows Figure 1 Schematic diagram of the structure of the valve components of the gas-liquid separator.

[0024] The above drawings include the following reference numerals:

[0025] 100. Gas-liquid separator;

[0026] 10. Main body; 11. First cavity; 12. Second cavity; 121. Preset inlet; 122. Preset outlet; 13. First shell; 14. Second shell; 15. Connecting pipe;

[0027] 20. Intake pipe; 21. Oil return hole; 22. First pipe section; 23. Second pipe section;

[0028] 30. Valve component; 31. Valve core; 32. Bracket; 33. Valve seat. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] The present invention provides a gas-liquid separator 100, please refer to Figure 1 and Figure 2 The gas-liquid separator 100 includes a body 10, an air intake pipe 20 and a valve member 30. The body 10 has a first cavity 11 and a second cavity 12 located in the first cavity 11; the second cavity 12 has a preset outlet 122, and the preset outlet 122 is communicated with the first cavity 11, so that the gas-liquid mixture in the second cavity 12 enters the first cavity 11 through the preset outlet 122; the air intake pipe 20 is arranged on the body 10 and is used to communicate with the air intake cavity of the compressor, so that the gas-liquid mixture in the first cavity 11 can be separated. The separated gas enters the suction chamber of the compressor through the suction pipe 20; the liquid separated from the gas-liquid mixture in the first cavity 11 falls to the bottom of the first cavity 11, and the valve member 30 is arranged in the first cavity 11 and is used to float on the liquid surface of the liquid falling to the bottom of the first cavity 11; when the liquid level in the first cavity 11 is equal to the first preset height, the valve member 30 is penetrated at the preset outlet 122 to form a shield for the preset outlet 122; wherein, the height of the air inlet of the suction pipe 20 is higher than the first preset height.

[0033] In the gas-liquid separator 100 of the present invention, the gas-liquid separator 100 includes a main body 10 and an intake pipe 20, the main body 10 has a first cavity 11 and a second cavity 12 located in the first cavity 11; the second cavity 12 has a preset outlet 122, and the preset outlet 122 is connected to the first cavity 11, so that the gas-liquid mixture in the second cavity 12 enters the first cavity 11 through the preset outlet 122, and the liquid in the gas-liquid mixture entering the first cavity 11 falls to the bottom of the first cavity 11 under the action of its own gravity, while the gas in the gas-liquid mixture flows to the upper part of the first cavity 11; the intake pipe 20 is penetrated on the main body 10 and is used to communicate with the intake cavity of the compressor, so that the separated gas of the gas-liquid mixture in the first cavity 11 enters the intake pipe 20, flows along the tube cavity of the intake pipe 20, and then flows into the intake cavity of the compressor. The gas-liquid separator 100 also includes a valve member 30, which is arranged in the first cavity 11 and is used to float on the liquid surface of the liquid falling into the bottom of the first cavity 11; when the liquid level in the first cavity 11 is equal to the first preset height, the valve member 30 is penetrated at the preset outlet 122 to block the preset outlet 122. At this time, the preset outlet 122 is completely blocked by the valve member 30, the preset outlet 122 is closed, the second cavity 12 is disconnected from the first cavity 11, and the gas-liquid mixture in the second cavity 12 can no longer enter the first cavity 11; the height of the air inlet of the intake pipe 20 is higher than the first preset height, so that the first cavity 11 can be prevented from continuing to accumulate liquid, and the liquid level of the accumulated liquid in the first cavity 11 can be prevented from exceeding the air inlet height of the intake pipe 20, thereby ensuring that the liquid level of the accumulated liquid in the first cavity 11 will not exceed the air inlet height of the intake pipe 20 under any circumstances.

[0034] Compared with the prior art in which the degree of liquid accumulation in the gas-liquid separator is judged and controlled by an additional heat recovery device or a pressure difference detection device, the gas-liquid separator 100 can prevent the liquid level of the accumulated liquid in the first cavity 11 from exceeding the air inlet height of the intake pipe 20 by cooperating with the valve member 30 and the preset outlet 122 of the second cavity 12; it can be seen that the gas-liquid separator 100 has a simple structure and a low cost, thereby simplifying the overall structure of the air-conditioning system having the gas-liquid separator 100 and reducing the cost, thereby solving the problem of complex structure of the air-conditioning system in the prior art.

[0035] Specifically, when the liquid level in the first cavity 11 is higher than the second preset height and lower than the first preset height, the valve member 30 is disposed at the preset outlet 122 to partially block the preset outlet 122. At this time, the flow area of ​​the preset outlet 122 becomes smaller; wherein the first preset height is higher than the second preset height.

[0036] In this embodiment, the valve component 30 includes a valve core 31, which is used to be installed at the preset outlet 122; the valve core 31 is cylindrical, and the outer circumference of the cross section of the valve core 31 perpendicular to its extension direction gradually decreases from bottom to top; when the liquid level in the first cavity 11 is higher than the second preset height and lower than or equal to the first preset height, the valve core 31 is installed at the preset outlet 122, and as the liquid level of the accumulated liquid in the first cavity 11 gradually rises, the blocking area of ​​the preset outlet 122 by the valve core 31 gradually increases, that is, the flow area of ​​the preset outlet 122 gradually decreases.

[0037] When the liquid level in the first cavity 11 is higher than the second preset height and lower than or equal to the first preset height, the valve core 31 blocks at least part of the preset outlet 122; that is, when the liquid level in the first cavity 11 is higher than the second preset height and lower than the first preset height, the valve core 31 blocks part of the preset outlet 122; when the liquid level in the first cavity 11 is equal to the first preset height, the valve core 31 blocks the preset outlet 122, and at this time the preset outlet 122 is completely blocked by the valve core 31.

[0038] Specifically, the valve member 30 further includes a bracket 32 ​​and a valve seat 33 . The valve core 31 is disposed on the bracket 32 ​​. The bracket 32 ​​is disposed on the valve seat 33 . The valve seat 33 is used to float on the liquid surface of the liquid in the first cavity 11 .

[0039] In this embodiment, the second cavity 12 has a preset inlet 121 , which is used to communicate with the outlet of the evaporator so that the gas-liquid mixture flowing out of the outlet of the evaporator enters the second cavity 12 through the preset inlet 121 .

[0040] Specifically, a connecting pipe 15 is provided at the preset inlet 121 of the second cavity 12, and the two pipe openings of the connecting pipe 15 are respectively connected to the preset inlet 121 and the outlet of the evaporator, so that the gas-liquid mixture flowing out from the outlet of the evaporator passes through the tube cavity of the connecting pipe 15 and then enters the second cavity 12 from the preset inlet 121.

[0041] Optionally, the preset outlet 122 is disposed at the bottom of the second cavity 12 , and the height of the air inlet of the air intake pipe 20 is higher than the height of the preset outlet 122 ; the preset inlet 121 is disposed at the top of the second cavity 12 .

[0042] In this embodiment, the main body 10 includes a first shell 13 and a second shell 14 . The first shell 13 surrounds a first cavity 11 . The second shell 14 surrounds a second cavity 12 . The second shell 14 is located in the first cavity 11 .

[0043] In this embodiment, an oil return hole 21 is provided on the suction pipe 20, and the oil return hole 21 is connected to the tube cavity of the suction pipe 20; the oil return hole 21 is provided on the tube section of the suction pipe 20 located in the first cavity 11. Since the medium (refrigerant or heat medium) in the compressor will contact the lubricating oil, a part of the lubricating oil will be discharged from the compressor with the flow of the medium, and enter the circulation loop formed by the evaporator, condenser, gas-liquid separator, etc., and return to the gas-liquid separator after a cycle and deposited at the bottom of the first cavity 11 (that is, the liquid separated by the gas-liquid separator is the lubricating oil). If the oil return hole 21 is not provided, the lubricating oil in the compressor will become less and less, and the lubricating oil deposited in the gas-liquid separator will become more and more.

[0044] Specifically, the air intake pipe 20 includes a first pipe section 22 , which extends in a vertical direction and passes through the main body 10 .

[0045] Specifically, the intake pipe 20 further includes a second pipe segment 23, which is connected to the first pipe segment 22 so that the tube cavities of the second pipe segment 23 are in communication with the tube cavities of the second pipe segment 23, and the tube cavities of the second pipe segment 23 are used to communicate with the intake cavity of the compressor.

[0046] Optionally, the second pipe section 23 extends in the horizontal direction.

[0047] Optionally, the oil return hole 21 is provided on the pipe section of the first pipe section 22 located in the first cavity 11 .

[0048] The present invention further provides an air conditioning device, which includes an evaporator, a compressor and the above-mentioned gas-liquid separator 100.

[0049] Specifically, the air conditioning device further includes a condenser and an expansion valve.

[0050] The present invention also provides an air conditioning equipment adjustment method, which is applicable to the above-mentioned air conditioning equipment.

[0051] In this embodiment, the air conditioning device adjustment method includes: calculating the initial operating frequency f0 of the compressor of the air conditioning device and the initial opening degree P0 of the valve port of the expansion valve of the air conditioning device according to the outdoor ambient temperature, the initial indoor ambient temperature, the set target temperature and the instantaneous exhaust volume of the air conditioning device. After the air conditioning device runs for a first predetermined time at the initial operating frequency f0 and the initial opening degree P0, the actual exhaust temperature of the compressor is detected. Comparing the actual exhaust temperature t1 of the compressor (here refers to the actual exhaust temperature of the compressor detected under the initial operating conditions) with the corresponding preset exhaust temperature t2 of the compressor (here refers to the preset exhaust temperature of the compressor calculated under the initial operating conditions), when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2, that is, t1-t2>△t1 or t1-t2<△t2, it is necessary to adjust the operating frequency of the compressor and / or the opening degree of the valve port of the expansion valve; otherwise, the requirements are met and no adjustment is required; wherein, △t1>△t2.

[0052] Among them, the initial indoor ambient temperature refers to the indoor ambient temperature when the air-conditioning equipment is turned on and / or before adjustment; the instantaneous exhaust volume of the air-conditioning equipment is determined according to the wind gear of the air-conditioning equipment initially set; the initial opening degree P0 of the valve port of the expansion valve is mainly calculated based on the temperature difference between the outdoor ambient temperature and the initial indoor ambient temperature; the exhaust temperature of the compressor refers to the gas temperature at the exhaust port of the compressor.

[0053] Optionally, the first predetermined time is 3 minutes.

[0054] Optionally, Δt2=-Δt1, when the absolute value of the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the compressor is greater than Δt1, it is necessary to adjust the operating frequency of the compressor and / or the opening of the valve port of the expansion valve.

[0055] Optionally, the first preset temperature difference Δt1 is 3°C; the second preset temperature difference Δt2 is -3°C.

[0056] In this embodiment, the calculation method of the preset exhaust temperature of the compressor includes: after the air-conditioning equipment runs for a preset time at a predetermined compressor operating frequency and a predetermined expansion valve opening, detecting the medium temperature in the evaporator of the air-conditioning equipment and the medium temperature in the condenser of the air-conditioning equipment; according to the medium temperature in the evaporator and the medium temperature in the condenser, respectively corresponding to the evaporation pressure and condensation pressure when the medium is in a saturated gas state; according to the evaporation pressure and the condensation pressure, calculating the preset exhaust temperature of the compressor.

[0057] It should be noted that when the preset compressor operating frequency, the preset expansion valve opening, and the preset time are different, the real-time medium temperature detected in the evaporator and the real-time medium temperature in the condenser are also different, and the preset exhaust temperature of the compressor is also different, that is, as the operating conditions of the air-conditioning equipment change, the corresponding preset exhaust temperature of the compressor also changes accordingly.

[0058] Specifically, the adiabatic compression formula is: 1 *V 1 K =Y 2 *V 2 K , where Y 1 V is the suction pressure of the compressor, which is equal to the evaporation pressure in the saturated gas state; 1 Y is the suction specific volume of the compressor; 2 is the exhaust pressure of the compressor, which is equal to the condensing pressure; V 2 is the exhaust volume of the compressor; K is the insulation coefficient, and the value range of K is 1.8 to 2.5.

[0059] The conversion formula between specific volume and temperature is: YV=nRT, where Y is pressure, V is specific volume, n is the molecular mass of the gas, R is the molar constant, and T is temperature.

[0060] Calculation method for preset exhaust temperature of compressor: when evaporation pressure, condensation pressure and suction temperature are known, exhaust temperature can be calculated according to the above adiabatic compression formula and the conversion formula between specific volume and temperature, and then the calculated exhaust temperature is multiplied by the correction coefficient to obtain the corrected exhaust temperature, that is, the preset exhaust temperature is obtained; wherein, the isentropic coefficient and the experimental coefficient are multiplied to obtain the correction coefficient.

[0061] Specifically, the initial operating conditions refer to the air-conditioning equipment operating at the initial operating frequency f0 and the initial opening P0 for the first predetermined time; when the predetermined compressor operating frequency is the initial operating frequency f0, the predetermined expansion valve opening is the initial opening P0, and the preset time is the first predetermined time, the corresponding compressor preset exhaust temperature under the initial operating conditions can be calculated.

[0062] Specifically, a temperature sensing package is set on the outer wall of the pipe of the evaporator for medium circulation to detect the medium temperature in the pipe of the evaporator, and then the medium temperature in the evaporator is obtained; a temperature sensing package is set on the outer wall of the pipe of the condenser for medium circulation to detect the medium temperature in the pipe of the condenser, and then the medium temperature in the condenser is obtained.

[0063] In this embodiment, when the air-conditioning equipment is in cooling mode, when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1, and when the outdoor ambient temperature is lower than the first preset temperature T1, and when the absolute value of the difference between the indoor ambient temperature and the set target temperature is lower than the third preset temperature difference △t3, the operating frequency of the compressor is reduced from the initial operating frequency f0 to the first operating frequency f1. After the compressor runs at the first operating frequency f1 for the second predetermined time, determine whether the difference between the actual exhaust temperature t1 of the compressor (here refers to the actual exhaust temperature of the compressor detected after the compressor runs at the first operating frequency f1 and the initial opening P0 for the second predetermined time) and the corresponding preset exhaust temperature t2 of the compressor (here refers to the preset exhaust temperature of the compressor calculated when the preset compressor operating frequency is the first operating frequency f1, the preset expansion valve opening is the initial opening P0, and the preset time is the second predetermined time) is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2; when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the corresponding compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2, control the opening of the valve port of the expansion valve to increase from the initial opening P0 to the first opening P1; otherwise, the requirement is met and no adjustment is required.

[0064] In this embodiment, when the air-conditioning equipment is in heating mode, when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1, and when the outdoor ambient temperature is greater than the second preset temperature T2, and when the absolute value of the difference between the indoor ambient temperature and the set target temperature is less than the third preset temperature difference △t3, the operating frequency of the compressor is reduced from the initial operating frequency f0 to the first operating frequency f1. After the compressor runs at the first operating frequency f1 for the second predetermined time, determine whether the difference between the actual exhaust temperature t1 of the compressor (here refers to the actual exhaust temperature of the compressor detected after the compressor runs at the first operating frequency f1 and the initial opening P0 for the second predetermined time) and the corresponding preset exhaust temperature t2 of the compressor (here refers to the preset exhaust temperature of the compressor calculated when the preset compressor operating frequency is the first operating frequency f1, the preset expansion valve opening is the initial opening P0, and the preset time is the second predetermined time) is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2; when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the corresponding compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2, control the opening of the valve port of the expansion valve to increase from the initial opening P0 to the first opening P1; otherwise, the requirement is met and no adjustment is required.

[0065] Specifically, the difference between the initial operating frequency f0 and the first operating frequency f1 is △f1, that is, f0-f1=△f1, and the value range of △f1 is 1Hz to 3Hz; the difference between the first opening P1 and the initial opening P0 is △P1, that is, P1-P0=△P1, and the value range of △P1 is 5 steps to 15 steps. In the subsequent repetition of the above adjustment process, if the operating frequency needs to be adjusted to reduce the operating frequency, each adjustment will reduce the operating frequency by 1Hz to 3Hz; if the opening needs to be adjusted to increase the opening, each adjustment will increase the opening by 5 steps to 15 steps.

[0066] Optionally, the second predetermined time is 120 seconds; Δt3>0.

[0067] In this embodiment, when the air-conditioning equipment is in cooling mode, when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the compressor is less than the second preset temperature difference △t2, and when the outdoor ambient temperature is greater than the first preset temperature T1, and when the absolute value of the difference between the indoor ambient temperature and the set target temperature is greater than the fourth preset temperature difference △t4, the operating frequency of the compressor is increased from the initial operating frequency f0 to the second operating frequency f2. After the compressor runs at the second operating frequency f2 for the third predetermined time, determine whether the difference between the actual exhaust temperature t1 of the compressor (here refers to the actual exhaust temperature of the compressor detected after the compressor runs at the second operating frequency f2 and the initial opening P0 for the third predetermined time) and the corresponding preset exhaust temperature t2 of the compressor (here refers to the preset exhaust temperature of the compressor calculated when the preset compressor operating frequency is the second operating frequency f2, the preset expansion valve opening is the initial opening P0, and the preset time is the third predetermined time) is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2; when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the corresponding compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2, control the opening of the valve port of the expansion valve to decrease from the initial opening P0 to the second opening P2; otherwise, the requirements are met and no adjustment is required.

[0068] In this embodiment, when the air-conditioning equipment is in heating mode, when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the compressor is less than the second preset temperature difference △t2, and when the outdoor ambient temperature is less than the second preset temperature T2, and when the absolute value of the difference between the indoor ambient temperature and the set target temperature is greater than the fourth preset temperature difference △t4, the operating frequency of the compressor is increased from the initial operating frequency f0 to the second operating frequency f2. After the compressor runs at the second operating frequency f2 for the third predetermined time, determine whether the difference between the actual exhaust temperature t1 of the compressor (here refers to the actual exhaust temperature of the compressor detected after the compressor runs at the second operating frequency f2 and the initial opening P0 for the third predetermined time) and the corresponding preset exhaust temperature t2 of the compressor (here refers to the preset exhaust temperature of the compressor calculated when the preset compressor operating frequency is the second operating frequency f2, the preset expansion valve opening is the initial opening P0, and the preset time is the third predetermined time) is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2; when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the corresponding compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2, control the opening of the valve port of the expansion valve to decrease from the initial opening P0 to the second opening P2; otherwise, the requirements are met and no adjustment is required.

[0069] Specifically, the difference between the second operating frequency f2 and the initial operating frequency f0 is △f2, that is, f2-f0=△f2, and the value range of △f2 is 1Hz to 3Hz; the difference between the initial opening P0 and the second opening P2 is △P2, that is, P0-P2=△P2, and the value range of △P2 is 5 steps to 15 steps. In the subsequent repetition of the above adjustment process, if the operating frequency needs to be adjusted to increase the operating frequency, each adjustment will increase the operating frequency by 1Hz to 3Hz; if the opening needs to be adjusted to reduce the opening, each adjustment will reduce the opening by 5 steps to 15 steps.

[0070] Optionally, the third predetermined time is 120 seconds; Δt4>0.

[0071] It should be noted that, since the indoor ambient temperature will change under the action of air-conditioning equipment, the indoor ambient temperature mentioned above refers to the real-time indoor ambient temperature.

[0072] It should be noted that the operating frequency of the compressor and the valve opening of the expansion valve can be continuously adjusted by the above-mentioned adjustment method until the difference between the actual exhaust temperature of the compressor and the preset exhaust temperature of the compressor is less than the first preset temperature difference △t1 and greater than the second preset temperature difference △t2.

[0073] It is worth emphasizing that the actual exhaust temperature t1 of the compressor mentioned above refers to the actual exhaust temperature of the compressor detected after the air-conditioning equipment has been running for a corresponding period of time at a corresponding operating frequency and a corresponding valve opening; the preset exhaust temperature of the compressor mentioned above refers to the corresponding evaporation pressure and condensation pressure obtained according to the medium temperature in the evaporator and the medium temperature in the condenser detected at this time after the air-conditioning equipment has been running for a corresponding period of time at a corresponding operating frequency and a corresponding valve opening, and the corresponding preset exhaust temperature of the compressor is calculated according to the corresponding evaporation pressure and condensation pressure.

[0074] It should be noted that the medium mentioned above refers to heat exchange medium, that is, refrigerant or heat medium.

[0075] The air conditioning equipment adjustment method can effectively control the liquid supply of the evaporator, thereby ensuring sufficient supply of liquid refrigerant medium to the evaporator while effectively ensuring the reliability of compressor operation; it can also prevent the evaporator from overheating.

[0076] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0077] In the gas-liquid separator 100 of the present invention, the gas-liquid separator 100 includes a main body 10 and an intake pipe 20, the main body 10 has a first cavity 11 and a second cavity 12 located in the first cavity 11; the second cavity 12 has a preset outlet 122, and the preset outlet 122 is connected to the first cavity 11, so that the gas-liquid mixture in the second cavity 12 enters the first cavity 11 through the preset outlet 122, and the liquid in the gas-liquid mixture entering the first cavity 11 falls to the bottom of the first cavity 11 under the action of its own gravity, while the gas in the gas-liquid mixture flows to the upper part of the first cavity 11; the intake pipe 20 is penetrated on the main body 10 and is used to communicate with the intake cavity of the compressor, so that the separated gas of the gas-liquid mixture in the first cavity 11 enters the intake pipe 20, flows along the tube cavity of the intake pipe 20, and then flows into the intake cavity of the compressor. The gas-liquid separator 100 also includes a valve member 30, which is arranged in the first cavity 11 and is used to float on the liquid surface of the liquid falling into the bottom of the first cavity 11; when the liquid level in the first cavity 11 is equal to the first preset height, the valve member 30 is penetrated at the preset outlet 122 to block the preset outlet 122. At this time, the preset outlet 122 is closed, the second cavity 12 is disconnected from the first cavity 11, and the gas-liquid mixture in the second cavity 12 can no longer enter the first cavity 11; the height of the air inlet of the intake pipe 20 is higher than the first preset height, so that the first cavity 11 can be prevented from continuing to accumulate liquid, and the liquid level of the accumulated liquid in the first cavity 11 can be prevented from exceeding the air inlet height of the intake pipe 20, thereby ensuring that the liquid level of the accumulated liquid in the first cavity 11 will not exceed the air inlet height of the intake pipe 20 under any circumstances.

[0078] Compared with the prior art in which the degree of liquid accumulation in the gas-liquid separator is judged and controlled by an additional heat recovery device or a pressure difference detection device, the gas-liquid separator 100 can prevent the liquid level of the accumulated liquid in the first cavity 11 from exceeding the air inlet height of the intake pipe 20 by cooperating with the valve member 30 and the preset outlet 122 of the second cavity 12; it can be seen that the gas-liquid separator 100 has a simple structure and a low cost, thereby simplifying the overall structure of the air-conditioning system having the gas-liquid separator 100 and reducing the cost, thereby solving the problem of complex structure of the air-conditioning system in the prior art.

[0079] It should be noted that the terms "first", "second", etc. in the specification and claims 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 data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0080] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for adjusting air conditioning equipment, characterized in that: The air conditioning equipment adjustment method is applicable to air conditioning equipment, and the air conditioning equipment adjustment method comprises: Calculate the initial operating frequency f0 of the compressor of the air conditioner and the initial opening degree P0 of the valve port of the expansion valve of the air conditioner according to the outdoor ambient temperature, the initial indoor ambient temperature, the set target temperature and the instantaneous exhaust volume of the air conditioner; After the air conditioner operates at the initial operating frequency f0 and the initial opening degree P0 for a first predetermined time, detecting an actual exhaust temperature t1 of the compressor; Comparing the actual exhaust temperature t1 of the compressor with the corresponding preset exhaust temperature t2 of the compressor, when the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference Δt1 or less than the second preset temperature difference Δt2, adjusting the operating frequency of the compressor and / or the opening of the valve port of the expansion valve; otherwise, no adjustment is required; wherein Δt1>Δt2; When the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1; when the air-conditioning device is in cooling mode, when the outdoor ambient temperature is less than the first preset temperature T1; or when the air-conditioning device is in heating mode, when the outdoor ambient temperature is greater than the second preset temperature T2; when the absolute value of the difference between the indoor ambient temperature and the set target temperature is less than the third preset temperature difference △t3, the operating frequency of the compressor is reduced from the initial operating frequency f0 to the first operating frequency f1; when the compressor is operated at the first operating frequency f1 After the compressor runs for a second predetermined time, determining whether the difference between the actual exhaust temperature t1 of the compressor and the corresponding preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2; after the compressor runs for a second predetermined time at the first operating frequency f1, and when the difference between the actual exhaust temperature t1 of the compressor and the corresponding preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2, controlling the opening of the valve port of the expansion valve to increase from the initial opening P0 to the first opening P1; When the difference between the actual exhaust temperature t1 of the compressor and the preset exhaust temperature t2 of the compressor is less than the second preset temperature difference △t2; when the air-conditioning device is in cooling mode, when the outdoor ambient temperature is greater than the first preset temperature T1; or when the air-conditioning device is in heating mode, when the outdoor ambient temperature is less than the second preset temperature T2; when the absolute value of the difference between the indoor ambient temperature and the set target temperature is greater than the fourth preset temperature difference △t4, the operating frequency of the compressor is increased from the initial operating frequency f0 to the second operating frequency f2; when the compressor is operated at the second operating frequency f2 After the compressor runs for a third predetermined time, determining whether the difference between the actual exhaust temperature t1 of the compressor and the corresponding preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2; after the compressor runs for a third predetermined time at the second operating frequency f2, and when the difference between the actual exhaust temperature t1 of the compressor and the corresponding preset exhaust temperature t2 of the compressor is greater than the first preset temperature difference △t1 or less than the second preset temperature difference △t2, controlling the opening of the valve port of the expansion valve to decrease from the initial opening P0 to the second opening P2; The calculation method of the preset exhaust temperature of the compressor includes: after the air-conditioning equipment runs for a preset time at a preset compressor operating frequency and a predetermined expansion valve opening, detecting the medium temperature in the evaporator of the air-conditioning equipment and the medium temperature in the condenser of the air-conditioning equipment; respectively corresponding to the evaporation pressure and the condensation pressure when the medium is in a saturated gas state according to the medium temperature in the evaporator and the medium temperature in the condenser; and calculating the preset exhaust temperature of the compressor according to the evaporation pressure and the condensation pressure.

2. An air conditioning device, comprising an evaporator, a compressor and a gas-liquid separator (100), characterized in that: The air conditioning equipment is suitable for the air conditioning equipment adjustment method described in claim 1.

3. The air conditioning device according to claim 2, characterized in that: The gas-liquid separator comprises: A main body (10), the main body (10) comprising a first cavity (11) and a second cavity (12) located in the first cavity (11); the second cavity (12) comprising a preset outlet (122), the preset outlet (122) being in communication with the first cavity (11); An air intake pipe (20), the air intake pipe (20) being arranged on the main body (10) and being used for communicating with the air intake chamber of the compressor; A valve component (30), wherein the liquid separated from the gas-liquid mixture in the first cavity (11) falls into the bottom of the first cavity (11), and the valve component (30) is arranged in the first cavity (11) and is used to float on the liquid surface of the liquid falling into the bottom of the first cavity (11); when the liquid surface of the liquid in the first cavity (11) is equal to a first preset height, the valve component (30) is penetrated at the preset outlet (122) to form a shield for the preset outlet (122); wherein the height of the air inlet of the air intake pipe (20) is higher than the first preset height.

4. The air conditioning device according to claim 3, characterized in that: When the liquid level in the first cavity (11) is higher than the second preset height and lower than the first preset height, the valve member (30) is disposed at the preset outlet (122) to partially block the preset outlet (122).

5. The air conditioning device according to claim 4, characterized in that: The valve member (30) comprises a valve core (31), and the valve core (31) is used to be inserted into the preset outlet (122); the valve core (31) is columnar, and the outer circumference of the cross section of the valve core (31) perpendicular to its extension direction gradually decreases from bottom to top; When the liquid level in the first cavity (11) is higher than the second preset height and lower than the first preset height, the valve core (31) partially blocks the preset outlet (122); when the liquid level in the first cavity (11) is equal to the first preset height, the valve core (31) blocks the preset outlet (122).

6. The air conditioning device according to claim 5, characterized in that: The valve member (30) further comprises: A bracket (32), wherein the valve core (31) is arranged on the bracket (32); A valve seat (33), the bracket (32) being arranged on the valve seat (33), and the valve seat (33) being used to float on the liquid surface of the liquid in the first cavity (11).

7. The air conditioning device according to claim 3, characterized in that: The second cavity (12) has a preset inlet (121), and the preset inlet (121) is used to communicate with the outlet of the evaporator, so that the gas-liquid mixture flowing out from the outlet of the evaporator enters the second cavity (12) through the preset inlet (121).

8. The air conditioning device according to claim 3, characterized in that: The preset outlet (122) is arranged at the bottom of the second cavity (12), and the height of the air inlet of the air intake pipe (20) is higher than the height of the preset outlet (122).

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