CN105466094A - Liquid level detection system, air conditioning system with same and liquid level control method - Google Patents
Liquid level detection system, air conditioning system with same and liquid level control method Download PDFInfo
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- CN105466094A CN105466094A CN201511003946.4A CN201511003946A CN105466094A CN 105466094 A CN105466094 A CN 105466094A CN 201511003946 A CN201511003946 A CN 201511003946A CN 105466094 A CN105466094 A CN 105466094A
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- 239000007788 liquid Substances 0.000 title claims abstract description 169
- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 238000004378 air conditioning Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000003507 refrigerant Substances 0.000 claims abstract description 42
- 238000003466 welding Methods 0.000 claims description 5
- 230000007547 defect Effects 0.000 abstract description 6
- 238000010790 dilution Methods 0.000 description 5
- 239000012895 dilution Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 241001269238 Data Species 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a liquid level detection system, which comprises a compressor (1) and a gas-liquid separator (6), and further comprises a liquid level detection pipe (8) with one end communicated with the gas-liquid separator (6), wherein the other end of the liquid level detection pipe (8) is fixed on an exhaust pipe (2) of the compressor (1), a first temperature sensor (9) is arranged at the liquid level detection pipe (8), a second temperature sensor (10) is arranged at an exhaust port of the compressor, and a pressure sensor is arranged at an air suction port of the compressor. According to the liquid level detection system, whether the liquid level in the gas-liquid separator reaches the early warning position or not can be accurately judged, and the defect that the liquid level detection and early warning cannot be carried out when the capacity of the existing gas-liquid separator is insufficient or the quantity of the stored liquid refrigerant exceeds the limit is overcome. The invention also relates to an air conditioning system with the system and a control method for controlling liquid level by using the detection system.
Description
Technical field
The invention belongs to air-conditioning technical field, be specifically related to a kind of liquid level detection system, there is the air-conditioning system of this system and liquid level controlling method.
Background technology
Existing in existing air-conditioning equipment system, being generally all provided with gas-liquid separator (low-pressure liquid storing tank), for preventing compressor hydraulic compression or dilution refrigeration machine oil, avoiding damaging compressor.But for the system that cooling medium charging amount is larger, particularly multi-connected machine, due to engineering also needing additional refrigerant, engineering complexity is high, and coolant quantity is not fixing, gas-liquid separator capacity will be caused so inadequate, and occur back the situation that liquid runs.Existing gas-liquid separator cannot carry out level sensing and early warning when off-capacity or the liquid refrigerants stored amount transfinite, and effectively cannot avoid the problem such as wet operation and refrigerator oil dilution of compressor.
Level sensing and early warning cannot be carried out when off-capacity or the liquid refrigerants stored amount transfinite because gas-liquid separator of the prior art exists, effectively cannot avoid the technical problem of the wet operation and refrigerator oil dilution etc. of compressor, therefore research and design of the present invention goes out a kind of liquid level detection system, has the air-conditioning system of this system and liquid level controlling method.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming gas-liquid separator of the prior art also exists the defect cannot carrying out level sensing and early warning when off-capacity or the liquid refrigerants stored amount transfinite, thus provides a kind of liquid level detection system, has the air-conditioning system of this system and liquid level controlling method.
The invention provides a kind of liquid level detection system, comprise compressor and gas-liquid separator, it also comprises the level sensing pipe that one end is connected with described gas-liquid separator, the other end of this level sensing pipe is fixed on the blast pipe of compressor, and place is provided with the first temperature sensor at level sensing pipe, and exhaust outlet of compressor place is provided with the second temperature sensor, and compressor air suction mouth place is provided with pressure sensor.
Preferably, the one end of the described level sensing pipe be connected with described gas-liquid separator is arranged on the corresponding height place of the early warning liquid level of described gas-liquid separator inside.
Preferably, the height of described early warning liquid level is set to the medium position of described gas-liquid separator.
Preferably, the described other end of described level sensing pipe is blind pipe.
Preferably, described blind pipe one end of being positioned at described compressor exhaust pipe is fixed by the mode of welding and this blast pipe.
Preferably, described first temperature sensor is arranged on the described other end of described level sensing pipe.
Preferably, described first temperature sensor and/or described second temperature sensor are temperature-sensitive bag.
The present invention also provides a kind of air-conditioning system, comprise outdoor heat exchanger, throttle part, indoor heat exchanger, compressor suction duct, described throttle part is arranged on the pipeline between described outdoor heat exchanger and described indoor heat exchanger, and it also comprises aforesaid liquid level detection system.
The present invention also provides a kind of liquid level controlling method, and it utilizes the liquid level of aforesaid liquid level detection system to gas-liquid separator to detect, and performs corresponding operation according to the result detected.
Preferably, real-time temperature values T1 is detected to obtain by the first temperature sensor, detect to obtain the temperature value T2 of exhaust outlet of compressor by the second temperature sensor, and detect the pressure of inspiration(Pi) Ps at compressor air suction mouth place simultaneously, calculated the saturation temperature T3 of this place's correspondence by this pressure of inspiration(Pi) Ps.
Preferably, when T2-T1≤the first assigned temperature, show that the refrigerant of level sensing pipe inside is gaseous state, then judge that refrigerant liquid level in now gas-liquid separator is lower than early warning position; When T2-T1 > first assigned temperature, and during T1-T3 < the second assigned temperature, then judge that the refrigerant of now level sensing pipe inside is as liquid, judge that the refrigerant liquid level in now gas-liquid separator has reached early warning position or more further.
Preferably, when detecting the refrigerant liquid level in gas-liquid separator lower than early warning position, normal operational system; When the refrigerant liquid level in gas-liquid separator reach or higher than early warning position time, take control manipulation to regulate and control this liquid level, by this liquid level regulation and control to early warning liquid level time, stop regulation and control, continue normal operational system.
Liquid level detection system provided by the invention, the air-conditioning system with this system and liquid level controlling method have following beneficial effect:
1. accurately can judge whether the liquid level of gas-liquid separator inside reaches early warning position, overcome existing gas-liquid separator cannot carry out level sensing and early warning defect when off-capacity or the liquid refrigerants amount that stores transfinite;
2. can also adjust controling parameters in time according to testing result, avoid compressor to wet the generation of operation, refrigerator oil dilution and the situation such as damage.
Accompanying drawing explanation
Fig. 1 is the structural representation with the air-conditioning system of liquid level detection system of the present invention;
Fig. 2 is the close-up schematic view of the part A in Fig. 1;
Fig. 3 is the view of the refrigerant liquid level in Fig. 2 in gas-liquid separator lower than early warning position;
Fig. 4 is refrigerant liquid level in Fig. 2 in gas-liquid separator view when just reaching early warning position;
Fig. 5 is the view of the refrigerant liquid level in Fig. 2 in gas-liquid separator higher than early warning position.
In figure, Reference numeral is expressed as:
1-compressor, 2-compressor exhaust pipe, 3-outdoor heat exchanger, 4-throttle part, 5-indoor heat exchanger, 6-gas-liquid separator, 7-compressor suction duct, 8-level sensing pipe, 9-the first temperature sensor, the 10-the second temperature sensor, 11-welding position.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
As illustrated in fig. 1 and 2, the invention provides a kind of liquid level detection system, comprise compressor 1 and gas-liquid separator 6, it also comprises the level sensing pipe 8 that one end is connected with described gas-liquid separator 6, the other end of this level sensing pipe 8 is fixed on the blast pipe 2 of compressor 1, and level sensing pipe 8 place is provided with the first temperature sensor 9, and exhaust outlet of compressor place is provided with the second temperature sensor 10, and compressor air suction mouth place is provided with pressure sensor (not shown).
Real-time temperature values T1 can be detected to obtain by the first temperature sensor 9, the temperature value T2 of exhaust outlet of compressor can be detected to obtain by the second temperature sensor 10, and detect the pressure of inspiration(Pi) Ps at compressor air suction mouth place simultaneously, the saturation temperature T3 of this place's correspondence is calculated by this pressure of inspiration(Pi) Ps, and then T1 and T2 and T1 and T3 is compared, then just accurately can judge whether the liquid level of gas-liquid separator inside reaches early warning position, overcome existing gas-liquid separator cannot carry out level sensing and early warning defect when off-capacity or the liquid refrigerants amount that stores transfinite.
Preferably, the one end of the described level sensing pipe 8 be connected with described gas-liquid separator 6 is arranged on the corresponding height place of the early warning liquid level of described gas-liquid separator 6 inside.Can be detected exactly by this one end of level sensing pipe like this and to reach when liquid level or to exceed the situation of more than this early warning liquid level, judge exactly enterprise's separator interior liquid level whether reach early warning position (or height).
Preferably, the height of described early warning liquid level is set to the medium position (this medium position may be selected to be the centre position of gas-liquid separator upper-lower height) of gas-liquid separator.This is a kind of preferred position and embodiment.
Preferably, the described other end (being fixed on the one end on described compressor exhaust pipe 2) of described level sensing pipe 8 is blind pipe.The object being set to blind pipe is to only import in this level sensing pipe by a little part for the refrigerant (gas or liquid) at early warning liquid level place, think that follow-up testing provides condition, also do not affect the normal work of gas-liquid separator or even air-conditioning system.
Preferably, one end that described blind pipe is positioned at the blast pipe 2 of described compressor fixes (preferably this blind pipe can be arranged l-shaped further, such shape can conveniently be welded and fixed on blast pipe) by the mode of welding with this blast pipe 2.This is a kind of preferred fixed form, so that this blind pipe and compressor exhaust pipe are fixed together and do not depart from the process run, make the refrigerant in gas-liquid separator can be compressed the impact of the high temperature heat transfer of machine blast pipe overheated gas to a greater degree, be gas or liquid with what accurately detect that early warning position sucks, thus accurately judge whether the liquid level of gas-liquid separator inside reaches early warning position.Can certainly select other but the fixed form being not limited to above-mentioned (such as welding) is fixed the two.
Preferably, described first temperature sensor 9 is arranged on the described other end of described level sensing pipe 8.Because the gas-liquid separator the closer to compressor exhaust pipe more can be subject to the Heat Transfer Influence of blast pipe high-temperature gas more, in gas-liquid separator, refrigerant can be more prone to be heated, no matter be that gas is reached the temperature be close with high-temperature gas in blast pipe by heating, or liquid state is flashed to gas by heating, then the first temperature sensor being arranged on the temperature that can detect more exactly by the refrigerant after heating herein, providing effective precondition for accurately detecting liquid level.
Further preferably can this first temperature sensor be fixed on the outer surface do not fitted with compressor exhaust pipe of level sensing pipe, as shown in Figure 2, further the first temperature sensor can be fixed on described level sensing pipe is welded on the opposite face in the face on described compressor exhaust pipe, such set-up mode first conveniently arranges sensor, and second is the temperature conditions in order to detect the refrigerant after receiving high temperature heat transfer more accurately.Fixed form further preferably between the first temperature sensor with level sensing pipe can adopt and weld, as shown in Figure 2.
Preferably, described first temperature sensor 9 and/or described second temperature sensor 10 are temperature-sensitive bag.This is preferred a kind of kind of temperature sensor, accurately can detect actual temperature.Particularly, described first temperature sensor 9 is liquid level temperature-sensitive bag, and described second temperature sensor 10 is compressor inlet temperature-sensitive bag.
As shown in Figure 1, present invention also offers a kind of air-conditioning system, comprise outdoor heat exchanger 3, throttle part 4 (the present invention can be preferably throttle expansion valve), indoor heat exchanger 5, compressor suction duct 7, described throttle part 4 is arranged on the pipeline between described outdoor heat exchanger 4 and described indoor heat exchanger 5, a complete air-conditioning system can be formed by such structure, complete a complete refrigeration or heat circulation, thus as required for indoor provide cold or the heat of needs.It also comprises aforesaid liquid level detection system.By comprise aforesaid liquid level detection system air-conditioning system can be enable accurately to judge whether the liquid level of gas-liquid separator inside reaches early warning position, thus overcome existing gas-liquid separator cannot carry out level sensing and early warning defect when off-capacity or the liquid refrigerants amount that stores transfinite.
Present invention also offers a kind of liquid level controlling method, it utilizes the liquid level of aforesaid liquid level detection system to gas-liquid separator to detect, and performs corresponding operation according to the result detected.Accurately can judge by utilizing aforesaid liquid level detection system whether the liquid level of gas-liquid separator inside reaches early warning position, thus overcome existing gas-liquid separator cannot carry out level sensing and early warning defect when off-capacity or the liquid refrigerants amount that stores transfinite, and then perform corresponding operation according to the result detected again, avoid wet operations, refrigerator oil of compressor to dilute and the generation of the situation such as damage.
Preferably, real-time temperature values T1 is detected to obtain by the first temperature sensor 9, detect to obtain the temperature value T2 of exhaust outlet of compressor by the second temperature sensor 10, and detect the pressure of inspiration(Pi) Ps at compressor air suction mouth place simultaneously, calculated the saturation temperature T3 of this place's correspondence by this pressure of inspiration(Pi) Ps.By each temperature value detecting or calculate, for accurately detecting liquid level and judging whether gas-liquid separator inside liquid level reaches early warning position and provide important precondition.
As shown in Figure 3, preferably, when T2-T1≤the first assigned temperature, (this first assigned temperature is preferably 5 DEG C, this preferred assigned temperature can be determined according to a large amount of experimental datas and experimental result) time, show that the refrigerant of level sensing pipe 8 inside is gaseous state, then judge that refrigerant liquid level in now gas-liquid separator is lower than early warning position;
This is because, when T2-T1≤the first assigned temperature, (this first assigned temperature is preferably 5 DEG C, this preferred assigned temperature can be determined according to a large amount of experimental datas and result) time, show that this two temperatures is close, the position be connected with compressor exhaust pipe 2 due to level sensing pipe 8 can be compressed the impact of machine exhaust high temperature, when level sensing pipe internal temperature T1 and compressor exhaust temperature T2 (refrigerant is gaseous state superheat state) close to time, then show that the refrigerant of level sensing pipe 8 inside is gaseous state, then can judge that refrigerant liquid level in now gas-liquid separator is lower than early warning position (namely set detection position), as shown in Figure 3.
As illustrated in figures 4-5, preferably, when T2-T1 > first assigned temperature (this first assigned temperature is preferably 5 DEG C), and (this second assigned temperature is preferably 3 DEG C to T1-T3 < second assigned temperature, this preferred assigned temperature is also determine according to a large amount of experimental datas and experimental result) time, then judge that the refrigerant of now level sensing pipe 8 inside is as liquid, judge that the refrigerant liquid level in now gas-liquid separator has reached early warning position (as shown in Figure 4) or more (as shown in Figure 5) further.
This is because, when T2-T1 > first assigned temperature (this first assigned temperature is preferably 5 DEG C), and (this second assigned temperature is preferably 3 DEG C to T1-T3 < second assigned temperature, this preferred assigned temperature is also determine according to a large amount of experimental datas and experimental result) time, show that T1 and T2 difference is larger, and it is close with T3, when level sensing pipe internal temperature T1 and compressor air suction saturation temperature T3 close to time, due to the impact of compressor exhaust pipe high-temperature heating, the inner refrigerant of level sensing pipe can directly evaporate, the saturation temperature of the low pressure suction port of its evaporating temperature and refrigerant is close, then judge that the refrigerant of now level sensing pipe 8 inside is as liquid, can judge that the refrigerant liquid level in now gas-liquid separator has reached early warning position (namely set detection position) or more further.
Preferably, when detecting the refrigerant liquid level in gas-liquid separator lower than early warning position, normal operational system; When the refrigerant liquid level in gas-liquid separator reach or higher than early warning position time; control manipulation (such as compressor shutdown, reduce the sequence of operations such as compressor operating frequency, adjustment controling parameters) is taked to regulate and control this liquid level; during by the regulation and control of this liquid level to early warning liquid level; stop regulation and control, continue normal operational system.Compressor can be effectively avoided to wet the generation of operation, refrigerator oil dilution and the situation such as damage by such control measures.
Those skilled in the art will readily understand, under the prerequisite of not conflicting, above-mentioned each advantageous manner freely can combine, superpose.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (12)
1. a liquid level detection system, comprise compressor (1) and gas-liquid separator (6), it is characterized in that: also comprise the level sensing pipe (8) that one end is connected with described gas-liquid separator (6), the other end of this level sensing pipe (8) is fixed on the blast pipe (2) of compressor (1), and level sensing pipe (8) place is provided with the first temperature sensor (9), and exhaust outlet of compressor place is provided with the second temperature sensor (10), and compressor air suction mouth place is provided with pressure sensor.
2. liquid level detection system according to claim 1, is characterized in that: the one end of the described level sensing pipe (8) be connected with described gas-liquid separator (6) is arranged on the corresponding height place of the inner early warning liquid level of described gas-liquid separator (6).
3. liquid level detection system according to claim 2, is characterized in that: the height of described early warning liquid level is set to the medium position of described gas-liquid separator (6).
4. according to the liquid level detection system one of claim 1-3 Suo Shu, it is characterized in that: the described other end of described level sensing pipe (8) is blind pipe.
5. liquid level detection system according to claim 4, is characterized in that: one end that described blind pipe is positioned at described compressor exhaust pipe (2) is fixing with this blast pipe (2) by the mode of welding.
6. according to the liquid level detection system one of claim 1-5 Suo Shu, it is characterized in that: described first temperature sensor (9) is arranged on the described other end of described level sensing pipe (8).
7. according to the liquid level detection system one of claim 1-6 Suo Shu, it is characterized in that: described first temperature sensor (9) and/or described second temperature sensor (10) are temperature-sensitive bag.
8. an air-conditioning system, comprise outdoor heat exchanger (3), throttle part (4), indoor heat exchanger (5), compressor suction duct (7), described throttle part (4) is arranged on the pipeline between described outdoor heat exchanger (4) and described indoor heat exchanger (5), it is characterized in that: also comprise the liquid level detection system that one of claim 1-7 is described.
9. a liquid level controlling method, is characterized in that: utilize the described liquid level of liquid level detection system to gas-liquid separator of one of claim 1-7 to detect, perform corresponding operation according to the result detected.
10. liquid level controlling method according to claim 9, it is characterized in that: detect to obtain real-time temperature values T1 by the first temperature sensor (9), the temperature value T2 of exhaust outlet of compressor is detected to obtain by the second temperature sensor (10), and detect the pressure of inspiration(Pi) Ps at compressor air suction mouth place simultaneously, calculated the saturation temperature T3 of this place's correspondence by this pressure of inspiration(Pi) Ps.
11. liquid level controlling methods according to claim 10, it is characterized in that: when T2-T1≤the first assigned temperature, show that the inner refrigerant of level sensing pipe (8) is gaseous state, then judge that refrigerant liquid level in now gas-liquid separator is lower than early warning position;
When T2-T1 > first assigned temperature, and during T1-T3 < the second assigned temperature, then judge that the inner refrigerant of now level sensing pipe (8) is liquid state, judge that the refrigerant liquid level in now gas-liquid separator has reached early warning position or more further.
12. liquid level controlling methods according to claim 11, is characterized in that: when detecting the refrigerant liquid level in gas-liquid separator lower than early warning position, normal operational system; When the refrigerant liquid level in gas-liquid separator reach or higher than early warning position time, take control manipulation to regulate and control this liquid level, by this liquid level regulation and control to early warning liquid level time, stop regulation and control, continue normal operational system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511003946.4A CN105466094B (en) | 2015-12-25 | 2015-12-25 | Liquid level detection system, air conditioning system with same and liquid level control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511003946.4A CN105466094B (en) | 2015-12-25 | 2015-12-25 | Liquid level detection system, air conditioning system with same and liquid level control method |
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| CN105466094A true CN105466094A (en) | 2016-04-06 |
| CN105466094B CN105466094B (en) | 2018-05-01 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109028451A (en) * | 2018-05-24 | 2018-12-18 | 珠海格力电器股份有限公司 | Gas-liquid separation method and device, computer equipment and storage medium |
| CN109162967A (en) * | 2018-11-06 | 2019-01-08 | 珠海格力电器股份有限公司 | Bearing cooling device, compressor, and bearing cooling control method |
| CN109642884A (en) * | 2016-08-29 | 2019-04-16 | 三菱电机株式会社 | Electrosatatic capacity detector and power conversion device |
| CN110462213A (en) * | 2017-03-29 | 2019-11-15 | 株式会社日立产机系统 | Feed flow formula gas compressor |
| CN111412697A (en) * | 2020-03-09 | 2020-07-14 | 珠海格力电器股份有限公司 | Gas-liquid separator, accumulated liquid control method thereof and air conditioner |
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| CN109162967A (en) * | 2018-11-06 | 2019-01-08 | 珠海格力电器股份有限公司 | Bearing cooling device, compressor, and bearing cooling control method |
| CN111412697A (en) * | 2020-03-09 | 2020-07-14 | 珠海格力电器股份有限公司 | Gas-liquid separator, accumulated liquid control method thereof and air conditioner |
| CN111412697B (en) * | 2020-03-09 | 2024-02-06 | 珠海格力电器股份有限公司 | Gas-liquid separator, liquid accumulation control method thereof and air conditioner |
| CN113513797A (en) * | 2021-07-13 | 2021-10-19 | 南京天加环境科技有限公司 | Air conditioning system capable of detecting liquid level of refrigerant |
| CN113970205B (en) * | 2021-10-27 | 2023-03-14 | 珠海格力电器股份有限公司 | Liquid-impact-prevention control system of liquid storage tank |
| CN113970205A (en) * | 2021-10-27 | 2022-01-25 | 珠海格力电器股份有限公司 | Liquid impact prevention control system of liquid storage tank |
| CN113932880B (en) * | 2021-12-21 | 2022-03-18 | 中国飞机强度研究所 | Airplane test liquid level measurement and control system |
| CN113932880A (en) * | 2021-12-21 | 2022-01-14 | 中国飞机强度研究所 | Airplane test liquid level measurement and control system |
| CN115031435A (en) * | 2022-05-17 | 2022-09-09 | 珠海格力电器股份有限公司 | Compressor assembly, air conditioner and control method |
| CN115095507A (en) * | 2022-08-24 | 2022-09-23 | 南通昆仑空调有限公司 | Air conditioner compressor for nuclear power |
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