CN103344357B - Device for detecting coolant system control parameters and detecting method - Google Patents
Device for detecting coolant system control parameters and detecting method Download PDFInfo
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- CN103344357B CN103344357B CN201310288317.5A CN201310288317A CN103344357B CN 103344357 B CN103344357 B CN 103344357B CN 201310288317 A CN201310288317 A CN 201310288317A CN 103344357 B CN103344357 B CN 103344357B
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Abstract
The invention provides a device for detecting coolant system control parameters and a detecting method. The problem that when coolant high-temperature saturation temperature is measured during an operation process of products such as an air conditioner and a heat-pump water heater, the coolant state at a temperature sensor position is converted to a too-hot state or a too-cold state because of changing of coolant flow or air side temperature, and accordingly detected saturation temperature is not accurate is solved. A stable coolant saturation state detecting zone is established through a detecting pipe, coolants in the detecting pipe are always in a saturation state, the saturation temperature detected through the method cannot be influenced by coolant circulation flow and outside air temperature, achieving is easy, cost is low, numerical values are real and accurate, and correctness of a system control mode is guaranteed.
Description
Technical field
The invention belongs to air conditioning and refrigeration field of engineering technology, specifically, relate to a kind of device and the detection method that detect coolant system controling parameters.
Background technology
In the control of the whole coolant system of air-conditioning, high pressure refrigerant pressure or saturation temperature, as an important controling parameters, usually can control compressor frequency to comprising, the performing an action of vitals such as aperture, rotation speed of fan of electric expansion valve have an impact.The determination of coolant system pressure, normally by detecting the saturation temperature in coolant system, by the corresponding relation of saturation temperature and coolant system pressure, and then determines coolant system pressure.Thus, saturation temperature is a very important controling parameters.
In existing air-conditioning, the mode of the medium position laying thermistor at heat exchanger that adopts measures saturation temperature more.But when operation of air conditioner, usually because the internal circulating load of refrigerant changes, or the change of heat exchanger air-side temperature, cause temperature sensor location place refrigerant to be in superheat state or supercooled state, and then cause the saturation temperature that records inaccurate.Saturation temperature is measured inaccurate meeting and is caused control system correctly not adjust parameters such as comprising press frequency, expansion valve opening, rotation speed of fan in time, phenomenon misoperation occurring or is failure to actuate, and then cause operation of air conditioner abnormal, affect the normal use of air-conditioning.
In addition, adopt in the product of plate type heat exchanger at some, in the hot water product as refrigerant-water heat exchange module, thermistor cannot be set at the medium position of heat exchange process, the thus saturation temperature of this system also very difficult measurement.
Although adopt the method for pressure transducer to measure refrigerant pressure in real time, avoid saturation temperature to measure inaccurate problem simultaneously.But pressure transducer cost is higher, easily cause air-conditioning products cost increase, price of complete machine is improved thereupon, and then air-conditioning products is declined in competitive power in price, lose competitive edge in price.
Summary of the invention
The invention provides a kind of device and the detection method that detect coolant system controling parameters, solve the products such as air-conditioning, Teat pump boiler, wind cooling cold and hot water when measuring refrigerant high pressure saturation temperature in operational process, because of cold medium flux change or air-side temperature, to change the temperature sensor location place refrigerant state transfer caused be superheat state or supercooled state, and then cause the inaccurate problem of saturation temperature that records.The present invention can also solve the problem adopting pressure transducer high expensive.
The present invention is a kind of brand-new measuring method substituting two kinds of existing measuring methods, and it utilizes detector tube to carry out detection high pressure saturation temperature, and the problem that refrigerant state changes can not occur, and also can avoid the problem of pressure transducer high cost simultaneously.
In order to solve the problems of the technologies described above, technical scheme of the present invention is, a kind of device detecting coolant system controling parameters, described coolant system comprises compressor, heat interchanger and refrigerant pipeline, and pick-up unit, described pick-up unit comprises detector tube and temperature sensor, described detector tube one end is closed, the other end is opened, the end of opening of described detector tube is communicated with needing the high pressure refrigerant pipeline detected, the part body contact of described detector tube is on the body of low temperature refrigerant pipeline, with low temperature refrigerant pipeline discontiguous detector tube body on described temperature sensor is set.
In the inventive solutions, also there is following additional technical feature:
The body of the detector tube contacted with low temperature refrigerant pipeline should higher than the connectivity part of the high pressure refrigerant pipeline needing to detect.
The setting position of described temperature sensor is in the scope of distance low-temperature refrigerant pipeline and detector tube body contact site 5-100mm.
The part body of described detector tube blind end is located on the body of low temperature refrigerant pipeline.
The body of described detector tube and low temperature refrigerant pipeline contact length are within the scope of 6-30mm.
The body of described detector tube and low temperature refrigerant pipeline reliable contacts.Be welded and fixed as adopted.
Described detector tube is two-part, one section is refrigerant storage pipe, another section is adapter, described refrigerant storage pipe one end is closed, and the other end is communicated with adapter, and the other end of adapter is communicated with needing the high pressure refrigerant pipeline detected, the part body contact of described refrigerant storage duct occlusion end is on the body of low temperature refrigerant pipeline, described temperature sensor is arranged on to be store on the body of pipe with the discontiguous refrigerant of low temperature refrigerant pipeline, described refrigerant storage pipe position upper, described adapter position under.
Described controling parameters is refrigerant saturation temperature and coolant system pressure, measures saturation temperature by described temperature sensor, by the corresponding relation of saturation temperature and pressure, and then draws coolant system pressure.
A kind of detection method using said apparatus, when coolant system circular flow, high pressure refrigerant enters detector tube inside by high pressure refrigerant pipeline, the gaseous coolant of detector tube inside and low temperature refrigerant pipe contact site exothermic condensation, and then make the refrigerant in detector tube be state of saturation, recorded the saturation temperature of refrigerant by the temperature sensor be laid on detector tube, by the corresponding relation of saturation temperature and pressure, draw coolant system pressure.
A kind of device detecting coolant system controling parameters, described coolant system comprises compressor, heat interchanger and refrigerant pipeline, and pick-up unit, described pick-up unit comprises detector tube and temperature sensor, described detector tube one end is closed, and the other end is opened, and the end of opening of described detector tube is communicated with needing the high pressure refrigerant pipeline detected, the body of described detector tube is in air, and detector tube body arranges described temperature sensor.
A kind of detection method using said apparatus, when coolant system circular flow, high pressure refrigerant enters detector tube inside by high pressure refrigerant pipeline, detector tube body and surrounding air carry out heat exchange, make the gaseous coolant exothermic condensation of detector tube inside, and then make the refrigerant in detector tube be state of saturation, recorded the saturation temperature of refrigerant by the temperature sensor be laid on detector tube, by the corresponding relation of saturation temperature and pressure, draw coolant system pressure.
The present invention compared with prior art has the following advantages and good effect:
1. the present invention utilizes detector tube to form miniature condensation process therein, refrigerant state can be made to remain state of saturation, the characteristic of state of saturation not malleable, it is measured and obtains saturation temperature, record saturation temperature accurate, overcome the problem that deviation easily appears in existing thermosensitive resistance measurement method.Avoid the control model that causes because controling parameters is inaccurate disorderly, and misoperation or phenomenon of being failure to actuate.
2. utilize detector tube to be communicated with high pressure refrigerant pipe, structure is simple, and be easy to realize, cost is low, overcomes the high cost problem adopting pressure transducer to bring.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram detecting the device embodiment 1 of coolant system controling parameters of the present invention;
Fig. 2 is the close-up schematic view of a-quadrant in Fig. 1;
1, compressor; 2, four-way valve; 3, evaporator; 4, condenser; 5, refrigerant pipeline; 5-1, high pressure refrigerant pipeline; 5-2, low temperature refrigerant pipe; 6, detector tube; 6-1, refrigerant storage pipe; 6-2, adapter; 7, temperature sensor; 8, throttling valve.
Embodiment
Embodiment 1
See Fig. 1 and Fig. 2, coolant system of the present invention comprises compressor 1, four-way valve 2, condenser 4, evaporator 3 and refrigerant pipeline 5.
In order to accurately record refrigerant saturation temperature, inventive concept is, refrigerant should be made to be in stable state of saturation all the time, thus should set up stable refrigerant state of saturation detection zone.
Technical scheme is, pick-up unit comprises detector tube 6, detector tube 6 one end is closed, the other end is opened, the end of opening of detector tube 6 is communicated with needing high pressure refrigerant pipeline 5-1 to be detected, the part body of detector tube 6 is attached on the body of low temperature refrigerant pipeline 5-2, and a bit of body of detector tube 6 is contacted with the body of low temperature refrigerant pipeline 5-2, and the way of contact can adopt modes such as welding or tie up.Detector tube 6 body arranges described temperature sensor 7, and the position of temperature sensor 7 should be located at detector tube 6 and be on the body of overhanging portion, alternatively, is located at on low temperature refrigerant pipeline 5-2 discontiguous detector tube 6 body.The setting position of temperature sensor 7 is in the scope of distance low-temperature refrigerant pipeline 5-2 and detector tube 6 body contact site 5-100mm.In the present embodiment, distance is 15mm.Our experiments show that, contact site will be avoided in the position of temperature sensor 7, but should near detector tube 6 top, and such position is refrigerant state of saturation stabilized zone, to reach measuring tempeature object accurately.
The body of the detector tube 6 contacted with low temperature refrigerant pipeline 5-2 should higher than the connectivity part of the high pressure refrigerant pipeline 5-1 needing to detect, be beneficial to refrigerant steam in signal piping after condensation, liquid refrigerant discharges signal piping automatically, and then forms the condensation process continued.。
In the present embodiment, the part body of detector tube 6 blind end is located on the body of low temperature refrigerant pipeline 5-2.Body and the low temperature refrigerant pipeline 5-2 contact length of detector tube 6 are 10mm.
In the present embodiment, described detector tube 6 is two-part, one section is refrigerant storage pipe 6-1, another section is adapter 6-2, the upper end of described refrigerant storage pipe 6-1 is closed, and lower end is communicated with adapter 6-2, and the other end of adapter 6-2 is communicated with needing the high pressure refrigerant pipeline 5-1 detected, this connectivity part is refrigerant pressure samples point, see Fig. 2.
The part body contact of refrigerant storage pipe 6-1 blind end is on the body of low temperature refrigerant pipeline 5-2, described temperature sensor 7 is arranged on to be store on the body of pipe 6-1 with the discontiguous refrigerant of low temperature refrigerant pipeline 5-2, refrigerant storage pipe 6-1 position upper, described adapter 6-2 position under.Refrigerant storage pipe 6-1 internal diameter should be greater than adapter 6-2 internal diameter.Adapter 6-2 can be common copper pipe or kapillary, selects kapillary easily refrigerant can be store tube portion and is arranged in different low temperature refrigerant pipeline places.
Certainly, as change, detector tube 6 can be a monoblock type copper pipe, such as, selects the copper pipe of external diameter Ф 6.35mm.
High pressure refrigerant pipeline 5-1 and low temperature refrigerant pipeline 5-2 is the pipeline in refrigerant pipeline 5 with high-low pressure difference.The high pressure refrigerant pipeline 5-1 place that adapter is communicated with is pressure samples point.In the present embodiment, high pressure refrigerant pipeline 5-1 and low temperature refrigerant pipeline 5-2 is gas outlet and the air intake duct of compressor respectively, see Fig. 1.
Controling parameters is refrigerant saturation temperature and coolant system pressure, measures saturation temperature by temperature sensor 7, by the corresponding relation of saturation temperature and pressure, draws coolant system pressure.
See Fig. 2, the detection method of refrigerant saturation temperature and pressure is described, when coolant system circular flow, it is inner that high pressure refrigerant enters detector tube 6 by high pressure refrigerant pipeline 5-1, the gaseous coolant of detector tube 6 inside and low temperature refrigerant pipe 5-2 contact site exothermic condensation, and then make the refrigerant in detector tube 6 be state of saturation, the saturation temperature of refrigerant is recorded by the temperature sensor 7 be laid on detector tube 6, by the corresponding relation of saturation temperature and pressure, draw coolant system pressure.
Visible, the present invention sets up stable refrigerant state of saturation detection zone by detector tube 6, the refrigerant in detector tube 6 is made to be in state of saturation all the time, utilize the saturation temperature that the method records, can not by the impact of refrigerant circular flow, also can not be subject to the impact of outside air temperature, numerical value true and accurate, ensure that the correctness of system control model.
Embodiment 2
A kind of device detecting coolant system pressure (or saturation temperature), coolant system comprises compressor, heat interchanger and refrigerant pipeline, and pick-up unit, pick-up unit comprises detector tube and temperature sensor, detector tube one end is closed, and the other end is opened, and the end of opening of detector tube is communicated with needing the high pressure refrigerant pipeline detected, the body of detector tube is in air, set temperature sensor on detector tube body.
The detection method of refrigerant saturation temperature and pressure, when coolant system circular flow, high pressure refrigerant enters detector tube inside by high pressure refrigerant pipeline, detector tube body and surrounding air carry out heat exchange, make the gaseous coolant exothermic condensation of detector tube inside, and then make the refrigerant in detector tube be state of saturation, recorded the saturation temperature of refrigerant by the temperature sensor be laid on detector tube, by the corresponding relation of saturation temperature and pressure, draw coolant system pressure.
Visible, embodiment 2 difference from Example 1 is, detector tube is installed in atmosphere, when the temperature of the surroundings is low, the refrigerant in detector tube can be made equally to be in state of saturation, thus reach the saturation temperature object accurately recorded.Although this embodiment is diagram not, those skilled in the art according to explanation, can know and understand this technical scheme.
The saturation temperature recorded by the inventive method, by the impact of refrigerant circular flow, also can not can not be subject to the impact of outside air temperature, also avoid the Cost Problems adopting pressure transducer to bring, and structure be simple, be easy to realize, reliable.
Claims (7)
1. one kind is detected the device of coolant system controling parameters, described coolant system comprises compressor, heat interchanger and refrigerant pipeline, and pick-up unit, it is characterized in that: described pick-up unit comprises detector tube and temperature sensor, described detector tube one end is closed, the other end is opened, the end of opening of described detector tube is communicated with needing the high pressure refrigerant pipeline detected, the part body contact of described detector tube is on the body of low temperature refrigerant pipeline, with low temperature refrigerant pipeline discontiguous detector tube body on described temperature sensor is set, the body of the detector tube contacted with low temperature refrigerant pipeline should higher than the connectivity part of the high pressure refrigerant pipeline needing to detect, described temperature sensor should near described detector tube top.
2. a kind of device detecting coolant system controling parameters according to claim 1, is characterized in that: the setting position of described temperature sensor is in the scope of distance low-temperature refrigerant pipeline and detector tube body contact site 5-100mm.
3. a kind of device detecting coolant system controling parameters according to claim 1 and 2, is characterized in that: the part body of described detector tube blind end is located on the body of low temperature refrigerant pipeline.
4. a kind of device detecting coolant system controling parameters according to claim 3, is characterized in that: the body of described detector tube and low temperature refrigerant pipeline contact length are within the scope of 6-30mm.
5. a kind of device detecting coolant system controling parameters according to claim 1, it is characterized in that: described detector tube is two-part, one section is refrigerant storage pipe, another section is adapter, described refrigerant storage pipe one end is closed, the other end is communicated with adapter, the other end of adapter is communicated with needing the high pressure refrigerant pipeline detected, the part body contact of described refrigerant storage duct occlusion end is on the body of low temperature refrigerant pipeline, described temperature sensor is arranged on to be store on the body of pipe with the discontiguous refrigerant of low temperature refrigerant pipeline, described refrigerant storage pipe position is upper, described adapter position under.
6. a kind of device detecting coolant system controling parameters according to claim 1, it is characterized in that: described controling parameters is the saturation temperature that refrigerant high-pressure and high-pressure are corresponding, saturation temperature is measured by described temperature sensor, by the corresponding relation of saturation temperature and pressure, and then draw coolant system pressure.
7. one kind uses the detection method of device described in claim 1, it is characterized in that, when coolant system circular flow, high pressure refrigerant enters detector tube inside by high pressure refrigerant pipeline, the gaseous coolant of detector tube inside and low temperature refrigerant pipe contact site exothermic condensation, and then make the refrigerant in detector tube be state of saturation, the saturation temperature of refrigerant is recorded by the temperature sensor be laid on detector tube, by the corresponding relation of saturation temperature and pressure, draw coolant system pressure.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105466094B (en) * | 2015-12-25 | 2018-05-01 | 珠海格力电器股份有限公司 | Liquid level detection system, air conditioning system with same and liquid level control method |
| CN106226479A (en) * | 2016-08-18 | 2016-12-14 | 珠海格力电器股份有限公司 | Method and device for detecting purity of refrigerant and refrigeration system |
| CN109724745A (en) * | 2017-10-31 | 2019-05-07 | 上汽通用汽车有限公司 | Car air conditioner refrigerant testing auxiliary device |
| CN112856716B (en) * | 2021-01-15 | 2022-05-17 | 广东美的暖通设备有限公司 | Air conditioning system and refrigerant state detection method and device thereof |
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| JP3662238B2 (en) * | 2002-01-10 | 2005-06-22 | エスペック株式会社 | Cooling device and thermostatic device |
| EP2157380B1 (en) * | 2008-01-21 | 2019-10-02 | Mitsubishi Electric Corporation | Heat pump apparatus and air conditioner or water heater having the heat pump apparatus mounted thereon |
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| CN2198586Y (en) * | 1994-06-25 | 1995-05-24 | 肖国雄 | Heat pipe radiating efficient radiator |
| EP0693663A2 (en) * | 1994-07-21 | 1996-01-24 | Mitsubishi Denki Kabushiki Kaisha | Control-information detecting apparatus for a refrigeration air-conditioner using a non-azeotrope refrigerant |
| CN1167249A (en) * | 1996-03-29 | 1997-12-10 | 株式会社电装 | Cooling device by use of boiling and condensing refrigerant |
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Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee after: Hisense Air Conditioning Co.,Ltd. Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd. |
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Effective date of registration: 20230407 Address after: 266510 No. 218, Qian Wan Gang Road, Huangdao District, Qingdao, Shandong. Patentee after: Qingdao Hisense network energy Co.,Ltd. Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee before: Hisense Air Conditioning Co.,Ltd. |