CN103116005B - The release of household electrical appliance hydrocarbon refrigerant and low explosion limits measurement mechanism - Google Patents
The release of household electrical appliance hydrocarbon refrigerant and low explosion limits measurement mechanism Download PDFInfo
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- CN103116005B CN103116005B CN201310070329.0A CN201310070329A CN103116005B CN 103116005 B CN103116005 B CN 103116005B CN 201310070329 A CN201310070329 A CN 201310070329A CN 103116005 B CN103116005 B CN 103116005B
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- refrigerant
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- temperature
- measurement system
- hydrocarbon refrigerant
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 53
- 238000005259 measurement Methods 0.000 title claims abstract description 45
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 30
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 30
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 30
- 238000004880 explosion Methods 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 title claims abstract description 13
- 238000009413 insulation Methods 0.000 claims abstract description 7
- 238000005303 weighing Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 9
- 238000013021 overheating Methods 0.000 claims 1
- 238000004378 air conditioning Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 7
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000001282 iso-butane Substances 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 235000015243 ice cream Nutrition 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
<b> the invention discloses the release of a kind of household electrical appliance hydrocarbon refrigerant and low explosion limits measurement mechanism, it comprises hydrocarbon refrigerant concentration measurement system, refrigerant temperature and flow control system, mass measurement system, it is characterized in that: it also comprises spin manifold temperature control system, the design reduces the impact of hot-air convection on mass measurement system, described refrigerant temperature and flow control system adopt external reservoir conduit mechanism, cover heat-insulation layer outward, described mass measurement system adopts 3 weighing measurement structures, the concentration measuring sensor of described hydrocarbon refrigerant concentration measurement system is external, whether this device reaches the measurement of low explosion limits after being mainly used in the hydrocarbon refrigerant leakage of refrigerator and air-conditioning, </b><bGreatT.Gre aT.GTPLC</b><bGr eatT.GreaT.GT is adopted to control, there is refrigerant heat and release control function and measurement of concetration and reach explosion limits warning function, possessing one-level warning and the secondary alarm function of explosion limits.</b>
Description
Technical field
the present invention relates to a kind of household electrical appliance checkout equipment, particularly relate to a kind of for the measurement of concetration after hydrocarbon refrigerant leakage in household electrical appliance, detect whether reach its low explosion limits.
Background technology
in order to protection of the environment, according to Montreal in 1987 bulletin regulation, fluorine-containing cold-producing medium progressively substitute by the cold-producing medium of some low harmful environmental protection, hydrocarbon and HFC are the mains direction of studying of alternative refrigerant.Hydrocarbon substitution refrigerated medium cryogen mainly contains: propane (R-290) and isobutane (R-600a), propane and isobutane toxicity is low, performance good, without ODP value and GWP value is low.Hydrocarbon owing to having nature environmental protection, super good thermodynamic cycle performance is widely used in inside small household appliance at present, the such as refrigerating appliance such as refrigerator, air-conditioning.But hydrocarbon refrigerant has flammable feature, the security therefore after its leakage is the content that current refrigeration industry and testing laboratory extremely pay close attention to.
current China 70% refrigerator employs R600a cold-producing medium.GB4706.13-2008(idtIEC60335-2-24:2007) " particular/special requirement of the safe refrigerating appliance of family expenses and similar applications electrical equipment, ice cream note and ice machine " and IEC60335-2-40:2005 " particular/special requirement of the safe heat pump of family expenses and similar applications electrical equipment, air conditioner and dehumidifier " explicitly point out: in airtight space, should not exceed 75% of the low blast limit value of hydrocarbon refrigerant after hydrocarbon refrigerant leakage, and the duration that its measured value exceedes the low blast limit value 50% of hydrocarbon refrigerant should more than 5min.
still unify the method for testing of combustible refrigerant explosion limits at present in the world, the difference of proving installation may cause explosion limits experiment value to differ several percentage points, domestic Ge great testing laboratory does not all have systematic measuring method at present, the only leak position of analogue measurement cold-producing medium, can not simulate the running status (comprising temperature, pressure condition) of cold-producing medium reality and the exact value of the low explosion limits of inflammable gas exactly.
Summary of the invention
the present invention seeks to: a kind of hydrocarbon refrigerant simulated leakage and apparatus for measuring concentration are provided, test is revealed in the hydrocarbon refrigerant simulation being mainly used in refrigerator and air-conditioning, PLC is adopted to control, there is refrigerant heat and release control function and measurement of concetration and reach explosion limits warning function, possessing one-level warning and the secondary alarm function of explosion limits.
technical scheme of the present invention is: a kind of household electrical appliance hydrocarbon refrigerant release and low explosion limits measurement mechanism, it comprises hydrocarbon refrigerant concentration measurement system, refrigerant temperature and flow control system, mass measurement system and spin manifold temperature control system, the design of described spin manifold temperature control system decreases the impact of hot-air convection on mass measurement system, described refrigerant temperature and flow control system adopt external reservoir conduit mechanism, cover heat-insulation layer outward, described mass measurement system adopts 3 weighing measurement structures, the concentration measuring sensor of described hydrocarbon refrigerant concentration measurement system is external.
preferably, described temperature sensor is placed in the gas piping of refrigerant tank outlet attachment, and an input pressure detection table detection refrigerant pressure is housed, solenoid control cold-producing medium is adopted to export, wrap heat-insulation layer outside gas piping, make the temperature of gas piping inner refrigerant not by the impact of external temperature.
preferably, 3 weighing measurement structures of described mass measurement system comprise three mass sensors and are fixed on below pallet, and each mass sensor is at a distance of 120 °, and measuring accuracy is high, and when quality is 12kg, precision is ± 0.1g.
preferably, described concentration measuring sensor is external, by data line and Instrument connection, can be infrared sensor.Be conducive to little space combustable gas concentration measure, continuous coverage institute survey region gas concentration change.And can be put into the required position measured easily, not by the impact of inspection detection space, the tested gaseous environment of maintenance of maximum possible simultaneously, avoids similar pump to inhale sampling and has an impact to the concentration of tested inflammable gas.
preferably, this device also comprises PLC control system, to cold-producing medium output quantity and time two ore control, can monitor the time of the first alarming value and the second alarming value simultaneously.To avoid the output of excessive hydrocarbon refrigerant be test site produce blast danger.
advantage of the present invention is:
1. in the present invention, the design of spin manifold temperature control system decreases the impact of hot-air convection on mass measurement system.
2. in the present invention, mass measurement system adopts 3 weighing measurement structures, and three mass sensors are at a distance of 120o, and when quality is 12kg, precision is ± 0.1g.
3. in the present invention, the measuring method of hydrocarbon refrigerant is use infrared sensor, sensor is external, the combustable gas concentration being conducive to little space is measured, the impact in not examined space can be put into the required position measured, maintain tested gaseous environment most possibly simultaneously, avoid similar pump to inhale sampling and the concentration of tested inflammable gas is had an impact.
4. apparatus of the present invention adopt PLC to control, and to cold-producing medium output quantity and time two ore control, make test site produce the danger of blast to avoid the output of excessive hydrocarbon refrigerant; The time of the first alarming value and the second alarming value can be monitored.
5. refrigerant temperature of the present invention and flow control system adopt external reservoir conduit mechanism, cover heat-insulation layer outward, make the temperature of gas piping inner refrigerant not by the impact of external temperature.
Accompanying drawing explanation
below in conjunction with drawings and Examples, the invention will be further described:
fig. 1 is that the present invention can heating cabinet and cut-away view;
fig. 2 is mass measurement system figure;
fig. 3 is refrigerant temperature and flow control system figure;
fig. 4 is outside drawing of the present invention.
wherein: 1, hydrocarbon refrigerant concentration measurement system; 2, refrigerant temperature and flow control system; 3, PLC control system; 4, spin manifold temperature control system; 5, mass measurement system; 7, mass sensor; 8, pallet; 9, temperature sensor; 10, input pressure detects table; 11, solenoid valve; 12, output pressure detects table; 13, kapillary; 14, concentration measuring sensor.
Embodiment
embodiment: as shown in Figure 1, mass measurement system 5 is placed with in heating cabinet, described mass measurement system 5 is 3 weighing measurement structures, be made up of a pallet 8 and three mass sensors 7 be fixed on below pallet 8, as shown in Figure 2, each mass sensor 7 is at a distance of 120 °, and measuring accuracy is high, and when quality is 12kg, precision is ± 0.1g.
be illustrated in figure 3 refrigerant temperature and flow control system 2, adopt external reservoir conduit mechanism, cover heat-insulation layer outward, comprising a temperature sensor 9 is placed in the gas piping of refrigerant tank outlet attachment, and an input pressure detection table 10 is housed detects refrigerant pressure, adopt solenoid valve 11 to control cold-producing medium and export, input pressure is detected table 10, output pressure detection table 12 and solenoid valve 11 external, in order that reduce casing internal leakage, ensure the safety of test.Cold-producing medium in gas piping to be released the region of specifying finally by kapillary 13.
as shown in Figure 4, the concentration measuring sensor 14 comprised in hydrocarbon refrigerant concentration measurement system 1 is external, by data line and Instrument connection.
the principle of work of the present embodiment is as follows:
the present embodiment adopts PLC to control, first cold-producing medium is heated in heating cabinet the temperature of regulation, utilize the mass measurement system 5 in heating cabinet to monitor the refrigerant quality of release simultaneously, cold-producing medium is outwards exported by the external reservoir conduit mechanism of refrigerant temperature and flow control system 2, flow is controlled by solenoid valve 11 in process, the information feed back of refrigerant temperature and flow is obtained by temperature sensor 9 and pressure detection table, finally, certain mass, uniform temperature, the cold-producing medium of certain pressure to be released the region of specifying by kapillary 13, then the concentration feedback in concentration measuring sensor 14 detection of leaks region is passed through to hydrocarbon refrigerant concentration measurement system 1, measure the combustable gas concentration in this region.According to one-level warning or the secondary warning of measuring the concentration that obtains and determine whether to carry out explosion limits.
certain above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All modifications done according to the Spirit Essence of main technical schemes of the present invention, all should be encompassed within protection scope of the present invention.
Claims (3)
1. a household electrical appliance hydrocarbon refrigerant release and low explosion limits measurement mechanism, it comprises hydrocarbon refrigerant concentration measurement system (1), refrigerant temperature and flow control system (2), mass measurement system (5) and spin manifold temperature control system (4), it is characterized in that: described refrigerant temperature and flow control system (2) adopt external reservoir conduit mechanism, cover heat-insulation layer outward, described mass measurement system (5) is positioned over heating cabinet inside, adopt 3 weighing measurement structures, the concentration measuring sensor (14) of described hydrocarbon refrigerant concentration measurement system (1) is external, also comprise PLC control system (3), to cold-producing medium output quantity and time two ore control, monitor the time of the first alarming value and the second alarming value simultaneously, 3 weighing measurement structures of described mass measurement system (5) comprise three mass sensors (7) and are fixed on pallet (8) below, each mass sensor (7) is at a distance of 120 °, measuring accuracy is high, when quality is 12kg, precision is ± 0.1g.
2. household electrical appliance hydrocarbon refrigerant release according to claim 1 and low explosion limits measurement mechanism, it is characterized in that: temperature sensor (9) is placed in the gas piping of refrigerant tank outlet attachment, and input pressure detection table (10) detection refrigerant pressure is housed, adopt solenoid valve (11) to control cold-producing medium to export, wrap heat-insulation layer outside gas piping, make the temperature of gas piping inner refrigerant not by the impact of external temperature.
3. household electrical appliance hydrocarbon refrigerant release according to claim 1 and low explosion limits measurement mechanism, it is characterized in that: described concentration measuring sensor (14) is external, by data line and Instrument connection, is infrared sensor.
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| CN201310070329.0A CN103116005B (en) | 2013-03-06 | 2013-03-06 | The release of household electrical appliance hydrocarbon refrigerant and low explosion limits measurement mechanism |
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| CN201310070329.0A CN103116005B (en) | 2013-03-06 | 2013-03-06 | The release of household electrical appliance hydrocarbon refrigerant and low explosion limits measurement mechanism |
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| CN103116005A CN103116005A (en) | 2013-05-22 |
| CN103116005B true CN103116005B (en) | 2015-11-11 |
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| CN108088490B (en) * | 2017-12-29 | 2020-06-02 | 律晖智能科技(上海)有限公司 | Data acquisition device |
| CN108548640A (en) * | 2018-03-13 | 2018-09-18 | 青岛海尔空调器有限总公司 | The hydrogen gas leakage detection method and device of the air-conditioning of Applied Electrochemistry compressor |
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Effective date of registration: 20161228 Address after: No. 1368 road Wuzhong Wuzhong Economic Development Zone in Suzhou city of Jiangsu Province in 215000 Patentee after: In recognition of Yingtai Testing Technology Co. Address before: No. 1368 building inspection Wuzhong road 215104 Suzhou city in Jiangsu Province Patentee before: Yang Zonghui Patentee before: Jiang Yinglong Patentee before: Hu Luoquan |