CN103344357A - 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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- CN103344357A CN103344357A CN2013102883175A CN201310288317A CN103344357A CN 103344357 A CN103344357 A CN 103344357A CN 2013102883175 A CN2013102883175 A CN 2013102883175A CN 201310288317 A CN201310288317 A CN 201310288317A CN 103344357 A CN103344357 A CN 103344357A
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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 Engineering technical field, specifically, relate to a kind of device and detection method that detects the refrigerant system control parameters.
Background technology
In the control of the whole refrigerant of air-conditioning system, high pressure refrigerant pressure or saturation temperature be as an important control parameter, can the execution action of vitals such as the aperture that comprises control compressor frequency, electric expansion valve, rotation speed of fan be exerted an influence usually.Determining of refrigerant system pressure, normally by detecting the intrasystem saturation temperature of refrigerant, by the corresponding relation of saturation temperature and refrigerant system pressure, and then definite refrigerant system pressure.Thereby saturation temperature is a very important control parameter.
The mode that many employings are laid thermistor at the medium position of heat exchanger in the existing air-conditioning is measured saturation temperature.But when operation of air conditioner, usually the internal circulating load because of refrigerant changes, or heat exchanger air side temperature variation, causes temperature sensor location place refrigerant to be in superheat state or supercooled state, and then causes the saturation temperature that records inaccurate.Saturation temperature measure inaccurate meeting cause control system can not be in time correctly to comprising that parameters such as press frequency, expansion valve opening, rotation speed of fan adjust, the phenomenon that misoperation takes place or be failure to actuate, and then cause operation of air conditioner unusual, influence the normal use of air-conditioning.
In addition, adopt in the product of plate type heat exchanger at some, among the hot water product as refrigerant-water heat exchange module, can't thermistor be set at the medium position of heat exchange process, thereby the also very difficult measurement of the saturation temperature of this system.
Though the method for adopts pressure sensor can be measured refrigerant pressure in real time, avoid saturation temperature to measure inaccurate problem simultaneously.But the pressure transducer cost is higher, causes the air-conditioning cost of products to rise easily, and price of complete machine is improved thereupon, and then the air-conditioning product is descended in price competitive power, loses competitive edge in price.
Summary of the invention
The invention provides a kind of device and detection method that detects the refrigerant system control parameters, when having solved products such as air-conditioning, Teat pump boiler, wind cooling cold and hot water and in operational process, having measured refrigerant high pressure saturation temperature, because cold medium flux changes or the air side temperature variation causes temperature sensor location place refrigerant state-transition is superheat state or supercooled state, and then cause the inaccurate problem of saturation temperature that records.The present invention can also solve the higher problem of adopts pressure sensor cost.
The present invention is a kind of brand-new measuring method that substitutes two kinds of existing measuring methods, and it utilizes detector tube to detect the high pressure saturation temperature, and the problem that the refrigerant state changes can not take place, and also can avoid the expensive problem of pressure transducer simultaneously.
In order to solve the problems of the technologies described above, technical scheme of the present invention is, a kind of device that detects the refrigerant system control parameters, described refrigerant 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 seals, the other end is opened, the high pressure refrigerant pipeline connection of opening end and needing to detect of described detector tube, the part body contact of described detector tube is arranging described temperature sensor with the discontiguous detector tube body of low temperature refrigerant pipeline on the body of low temperature refrigerant pipeline.
In technical scheme of the present invention, also have following additional technical feature:
Should be higher than the place that is communicated with of high pressure refrigerant pipeline that needs detect with the body of the contacted detector tube of low temperature refrigerant pipeline.
The position that arranges of described temperature sensor is in the scope apart from 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 in the 6-30mm scope.
The body of described detector tube reliably contacts with low temperature refrigerant pipeline.Fixing as adopting welding.
Described detector tube is two-part, one section is refrigerant storage pipe, another section is for taking over, described refrigerant storage Guan Yiduan seals, and the other end is communicated with adapter, the other end of adapter and the high pressure refrigerant pipeline connection that needs to detect, 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 the discontiguous refrigerant of low temperature refrigerant pipeline and stores on the body of pipe, and described refrigerant storage pipe position is last, and described adapter position is following.
Described control parameter is refrigerant saturation temperature and refrigerant system pressure, measures saturation temperature by described temperature sensor, by the corresponding relation of saturation temperature and pressure, and then draws the refrigerant system pressure.
A kind of detection method of using said apparatus, when the refrigerant systemic circulation is moved, the high pressure refrigerant enters detector tube inside by high pressure refrigerant pipeline, the gaseous coolant of detector tube inside and the contact site heat release condensation of low temperature refrigerant pipe, and then to make the refrigerant in the detector tube be state of saturation, record the saturation temperature of refrigerant by being laid in temperature sensor on the detector tube, by the corresponding relation of saturation temperature and pressure, draw the refrigerant system pressure.
A kind of device that detects the refrigerant system control parameters, described refrigerant 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 seals, and the other end is opened, the high pressure refrigerant pipeline connection of opening end and needing to detect of described detector tube, the body of described detector tube is in the air, at the detector tube body described temperature sensor is set.
A kind of detection method of using said apparatus, when the refrigerant systemic circulation is moved, the high pressure refrigerant enters detector tube inside by high pressure refrigerant pipeline, detector tube body and surrounding air are carried out heat exchange, make the gaseous coolant heat release condensation of detector tube inside, and then to make the refrigerant in the detector tube be state of saturation, record the saturation temperature of refrigerant by being laid in temperature sensor on the detector tube, by the corresponding relation of saturation temperature and pressure, draw the refrigerant system pressure.
The present invention compared with prior art has the following advantages and good effect:
The present invention utilize detector tube within it portion form miniature condensation process, can make the refrigerant state remain state of saturation, state of saturation is the characteristic of malleable not, to its measurement and acquisition saturation temperature, it is accurate to record saturation temperature, has overcome the problem that deviation appears in existing thermosensitive resistance measurement method easily.Avoided because of the inaccurate control model disorder that causes of control parameter, and misoperation or the phenomenon of being failure to actuate.
2. utilize detector tube to be communicated with high pressure refrigerant pipe, simple in structure, be easy to realize that cost is low, has overcome the expensive problem that adopts pressure sensor brings.
Description of drawings
Fig. 1 is a kind of synoptic diagram that detects the device embodiment 1 of refrigerant system control parameters of the present invention;
Fig. 2 is the local enlarged diagram of a-quadrant among 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
Referring to Fig. 1 and Fig. 2, refrigerant of the present invention system comprises compressor 1, four-way valve 2, condenser 4, evaporator 3 and refrigerant pipeline 5.
In order accurately to record the refrigerant saturation temperature, inventive concept is should make refrigerant be in stable state of saturation all the time, thereby should set up stable refrigerant state of saturation detection zone.
Technical scheme is, pick-up unit comprises detector tube 6, detector tube 6 one ends seal, 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 be adopted modes such as welding or tie up.Described temperature sensor 7 is set on detector tube 6 bodys, and the position of temperature sensor 7 should be located at detector tube 6 and be on the body of overhanging portion, also we can say, be located at discontiguous detector tube 6 bodys of low temperature refrigerant pipeline 5-2 on.The position that arranges of temperature sensor 7 is in the scope apart from 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 the contact site will be avoided in the position of temperature sensor 7, but should be near detector tube 6 tops, such position is refrigerant state of saturation stabilized zone, measures temperature purpose accurately to reach.
Should be higher than the place that is communicated with of high pressure refrigerant pipeline 5-1 that needs detect with the body of the contacted detector tube 6 of low temperature refrigerant pipeline 5-2, be beneficial to refrigerant steam in signal piping after the condensation, liquid refrigerant is discharged signal piping automatically, and then forms the condensation process that continues.。
In the present embodiment, the part body of detector tube 6 blind ends is located on the body of low temperature refrigerant pipeline 5-2.The body of detector tube 6 and low temperature refrigerant pipeline 5-2 contact length are 10mm.
In the present embodiment, described detector tube 6 is two-part, one section is refrigerant storage pipe 6-1, another section is for taking over 6-2, the upper end of described refrigerant storage pipe 6-1 is sealed, and the lower end is communicated with adapter 6-2, and the other end of taking over 6-2 is communicated with needing the high pressure refrigerant pipeline 5-1 that detects, this connection place is refrigerant pressure samples point, referring to 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 the discontiguous refrigerant storage of low temperature refrigerant pipeline 5-2 and manages on the body of 6-1, refrigerant storage pipe 6-1 position is last, and described adapter 6-2 position is following.Refrigerant storage pipe 6-1 internal diameter should be greater than taking over the 6-2 internal diameter.Take over 6-2 and can be common copper pipe or kapillary, select for use kapillary can easily refrigerant be store tube portion and be arranged in different low temperature refrigerant pipeline places.
Certainly, as variation, detector tube 6 can be a monoblock type copper pipe, for example, selects the copper pipe of external diameter Ф 6.35mm for use.
High pressure refrigerant pipeline 5-1 and low temperature refrigerant pipeline 5-2 are the pipelines that has the height pressure differential in the refrigerant pipeline 5.Taking over the high pressure refrigerant pipeline 5-1 place that is communicated with is the pressure samples point.In the present embodiment, high pressure refrigerant pipeline 5-1 and low temperature refrigerant pipeline 5-2 are respectively gas outlet and the air intake duct of compressor, referring to Fig. 1.
The control parameter is refrigerant saturation temperature and refrigerant system pressure, measures saturation temperature by temperature sensor 7, by the corresponding relation of saturation temperature and pressure, draws the refrigerant system pressure.
Referring to Fig. 2, the detection method of refrigerant saturation temperature and pressure is described, when the refrigerant systemic circulation is moved, the high pressure refrigerant enters detector tube 6 inside by high pressure refrigerant pipeline 5-1, the gaseous coolant of detector tube 6 inside and low temperature refrigerant pipe 5-2 contact site heat release condensation, and then to make the refrigerants in the detector tube 6 be state of saturation record the saturation temperature of refrigerant by being laid in temperature sensor 7 on the detector tube 6, by the corresponding relation of saturation temperature and pressure, draw the refrigerant system pressure.
As seen, the present invention sets up stable refrigerant state of saturation detection zone by detector tube 6, make the refrigerant in the detector tube 6 be in state of saturation all the time, the saturation temperature of utilizing this method to record, can not be subjected to the influence of refrigerant circular flow, also can not be subjected to the influence of outside air temperature, the numerical value true and accurate has guaranteed the correctness of system's control model.
The device of a kind of detection refrigerant system pressure (or saturation temperature), the refrigerant 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 seals, and the other end is opened, the high pressure refrigerant pipeline connection of opening end and needing to detect of detector tube, the body of detector tube is in the air, at the detector tube body temperature sensor is set.
The detection method of refrigerant saturation temperature and pressure, when the refrigerant systemic circulation is moved, the high pressure refrigerant enters detector tube inside by high pressure refrigerant pipeline, detector tube body and surrounding air are carried out heat exchange, make the gaseous coolant heat release condensation of detector tube inside, and then to make the refrigerant in the detector tube be state of saturation, record the saturation temperature of refrigerant by being laid in temperature sensor on the detector tube, by the corresponding relation of saturation temperature and pressure, draw the refrigerant system pressure.
As seen, embodiment 2 difference from Example 1 are that detector tube is installed in the air, when environment temperature is low, can make the refrigerant in the detector tube be in state of saturation equally, thereby reach the saturation temperature that records purpose accurately.Though this embodiment is diagram not, those skilled in the art can know and understand this technical scheme according to explanation.
Saturation temperature by the inventive method records can not be subjected to the influence of refrigerant circular flow, can not be subjected to the influence of outside air temperature yet, the cost problem of also having avoided adopts pressure sensor to bring, and simple in structure, be easy to realize, reliable.
Claims (10)
1. device that detects the refrigerant system control parameters, described refrigerant 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 seals, the other end is opened, the high pressure refrigerant pipeline connection of opening end and needing to detect of described detector tube, the part body contact of described detector tube is arranging described temperature sensor with the discontiguous detector tube body of low temperature refrigerant pipeline on the body of low temperature refrigerant pipeline.
2. a kind of device that detects the refrigerant system control parameters according to claim 1 is characterized in that: should be higher than the place that is communicated with of high pressure refrigerant pipeline that needs detect with the body of the contacted detector tube of low temperature refrigerant pipeline.
3. a kind of device that detects the refrigerant system control parameters according to claim 1 is characterized in that: described temperature sensor the position is set in the scope apart from low temperature refrigerant pipeline and detector tube body contact site 5-100mm.
4. according to claim 1 or 2 or 3 described a kind of devices that detect the refrigerant system control parameters, it is characterized in that: the part body of described detector tube blind end is located on the body of low temperature refrigerant pipeline.
5. a kind of device that detects the refrigerant system control parameters according to claim 4, it is characterized in that: the body of described detector tube and low temperature refrigerant pipeline contact length are in the 6-30mm scope.
6. a kind of device that detects the refrigerant system control 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 for taking over, described refrigerant storage Guan Yiduan seals, the other end is communicated with adapter, the other end of taking over and the high pressure refrigerant pipeline connection that needs to detect, 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 the discontiguous refrigerant of low temperature refrigerant pipeline and stores on the body of pipe, described refrigerant storage pipe position is last, and described adapter position is following.
7. a kind of device that detects the refrigerant system control parameters according to claim 1, it is characterized in that: described control parameter is the saturation temperature of refrigerant high-pressure and high-pressure correspondence, measure saturation temperature by described temperature sensor, by the corresponding relation of saturation temperature and pressure, and then draw the refrigerant system pressure.
8. device that detects the refrigerant system control parameters, described refrigerant 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 seals, and the other end is opened, the high pressure refrigerant pipeline connection of opening end and needing to detect of described detector tube, the body of described detector tube is in the air, at the detector tube body described temperature sensor is set.
9. a right to use requires 1 described Device Testing method, it is characterized in that, when the refrigerant systemic circulation is moved, the high pressure refrigerant enters detector tube inside by high pressure refrigerant pipeline, the gaseous coolant of detector tube inside and the contact site heat release condensation of low temperature refrigerant pipe, and then to make the refrigerant in the detector tube be state of saturation record the saturation temperature of refrigerant by being laid in temperature sensor on the detector tube, by the corresponding relation of saturation temperature and pressure, draw the refrigerant system pressure.
10. a right to use requires 8 described Device Testing methods, it is characterized in that, when the refrigerant systemic circulation is moved, the high pressure refrigerant enters detector tube inside by high pressure refrigerant pipeline, and detector tube body and surrounding air are carried out heat exchange, makes the gaseous coolant heat release condensation of detector tube inside, and then to make the refrigerant in the detector tube be state of saturation, record the saturation temperature of refrigerant by being laid in temperature sensor on the detector tube, by the corresponding relation of saturation temperature and pressure, draw the refrigerant system pressure.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105466094A (en) * | 2015-12-25 | 2016-04-06 | 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 |
| CN112856716A (en) * | 2021-01-15 | 2021-05-28 | 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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| 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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| CN103344357B (en) | 2015-04-08 |
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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. |