CN103116005A - Device for measuring whether leaked hydrocarbon refrigerant reaches lower-explosive limit or not for home appliances - Google Patents
Device for measuring whether leaked hydrocarbon refrigerant reaches lower-explosive limit or not for home appliances Download PDFInfo
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- CN103116005A CN103116005A CN2013100703290A CN201310070329A CN103116005A CN 103116005 A CN103116005 A CN 103116005A CN 2013100703290 A CN2013100703290 A CN 2013100703290A CN 201310070329 A CN201310070329 A CN 201310070329A CN 103116005 A CN103116005 A CN 103116005A
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Abstract
The invention discloses a device for measuring whether leaked hydrocarbon refrigerant reaches lower-explosive limit or not for home appliances. The device comprises a hydrocarbon refrigerant concentration measuring system, a refrigerant temperature and flow control system and a quality measuring system. The device is characterized by further comprising a box body temperature control system and an external thermal insulation layer, the influence of the hot-air convection to the quality measuring system can be reduced due to the design, the refrigerant temperature and flow control system adopts an external storage pipeline mechanism, the quality measuring system adopts a three-point weighing and measuring structure, and a concentration measuring sensor of the hydrocarbon refrigerant concentration measuring system is externally arranged; and the device is mainly used for the measuring whether the leaked hydrocarbon refrigerant reaches the lower-explosive limit or not for the refrigerator and the air conditioner, is controlled by a PLC (programmable logic controller), has the functions of refrigerant heating and releasing controlling, concentration measuring, and alarming when the leaked hydrocarbon refrigerant reaches the explosive limit, and has a first-stage alarm function and a second-stage alarm function when the leaked hydrocarbon refrigerant reaches the explosive limit.
Description
Technical field
the present invention relates to a kind of household electrical appliance checkout equipment, relate in particular to a kind of measurement of concetration after leaking for hydrocarbon refrigerant in household electrical appliance, detect and whether reach its low explosion limits.
Background technology
for protection of the environment, according to Montreal bulletin regulation in 1987, fluorine-containing cold-producing medium was progressively substituted by the cold-producing medium of some low evil environmental protection, and 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, low without ODP value and GWP value.Hydrocarbon is widely used in small household appliance the inside, refrigerating appliances such as refrigerator, air-conditioning at present owing to having nature environmental protection, super good thermodynamic cycle performance.But hydrocarbon refrigerant has flammable feature, so the security after its leakage is the content that current refrigeration industry and testing laboratory extremely pay close attention to.
china's 70% refrigerator has used the R600a cold-producing medium at present.GB4706.13-2008(idt IEC60335-2-24:2007) " specific (special) requirements of the safe refrigerating appliance of family expenses and similar applications electrical equipment, ice cream note and ice machine " and IEC 60335-2-40:2005 " specific (special) requirements of safe heat pump, air conditioner and the dehumidifier of family expenses and similar applications electrical equipment " explicitly point out: should not surpass 75% of the low blast of hydrocarbon refrigerant limit value after hydrocarbon refrigerant leaks in airtight space, and its measured value surpasses the low duration of exploding limit value 50% of hydrocarbon refrigerant and should not surpass 5min.
still do not unify in the world at present the method for testing of combustible refrigerant explosion limits, the difference of proving installation may cause the explosion limits experiment value to differ several percentage points, domestic each large testing laboratory does not all have systematic measuring method at present, only the leak position of analogue measurement cold-producing medium, can not simulate the running status (comprising the 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 that is mainly used in refrigerator and air-conditioning, adopt PLC to control, there is cold-producing medium heating and release control function and measurement of concetration and reach the 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 discharges and low explosion limits measurement mechanism, it comprises the 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 has reduced 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 measurement of concetration sensor of described hydrocarbon refrigerant concentration measurement system is external.
preferably, described temperature sensor is placed in the gas piping of refrigerant tank outlet annex, and an input pressure detection table is housed detects refrigerant pressure, adopt the output of solenoid control cold-producing medium, gas piping outside wraps heat-insulation layer, makes the temperature of gas piping inner refrigerant not be subject to the impact of external temperature.
preferably, 3 weighing measurement structures of described mass measurement system comprise that three mass sensors are fixed on the pallet below, and each mass sensor is at a distance of 120 °, and measuring accuracy is high, in the situation that quality is 12 kg precision, is ± 0.1g.
preferably, described measurement of concetration sensor is external, by data line and Instrument connection, can be infrared sensor.The combustable gas concentration that is conducive to little space is measured, and continuous coverage is surveyed regional gas concentration and changed.And can be put into easily the position of required measurement, do not examined the impact of detection space, simultaneously maximum possible maintain tested gaseous environment, avoid similar pump to inhale sampling the concentration of tested inflammable gas exerted an influence.
preferably, this device also comprises the PLC control system, to cold-producing medium output quantity and dual control of time, can monitor the time of the first alarming value and the second alarming value simultaneously.With the output of avoiding excessive hydrocarbon refrigerant be test site produces the danger of blast.
advantage of the present invention is:
1. in the present invention, the design of spin manifold temperature control system has reduced 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, at a distance of 120o, in the situation that quality is 12 kg precision are ± 0.1g.
3. in the present invention, the measuring method of hydrocarbon refrigerant is the use infrared sensor, sensor is external, the combustable gas concentration that is conducive to little space is measured, the impact in examined space can not be put into the position of required measurement, maintain most possibly tested gaseous environment, avoid similar pump to inhale the concentration of sampling to tested inflammable gas and exert an influence simultaneously.
4. apparatus of the present invention adopt PLC to control, and to cold-producing medium output quantity and dual control of time, with the output of avoiding excessive hydrocarbon refrigerant, make test site produce the danger of blast; Can monitor the time of the first alarming value and the second alarming value.
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 be subject to the impact of external temperature.
The accompanying drawing explanation
below in conjunction with drawings and Examples, the invention will be further described:
but Fig. 1 is the present invention's 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, measurement of concetration sensor.
Embodiment
embodiment: as shown in Figure 1, be placed with mass measurement system 5 in heating cabinet, described mass measurement system 5 is 3 weighing measurement structures, by a pallet 8 and three mass sensors 7 being fixed in pallet 8 belows, formed, as shown in Figure 2, each mass sensor 7 is at a distance of 120 °, and measuring accuracy is high, in the situation that quality is 12 kg 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, comprise that a temperature sensor 9 is placed in the gas piping of refrigerant tank outlet annex, and input pressure detection table 10 a detection refrigerant pressure is housed, and adopt solenoid valve 11 to control cold-producing mediums output, input pressure is detected to table 10, output pressure detection table 12 and solenoid valve 11 external, in order that reduce the casing internal leakage, guarantee the safety of test.Cold-producing medium in gas piping is finally by the release zone of appointment of kapillary 13.
as shown in Figure 4, the measurement of concetration 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, at first cold-producing medium is heated in heating cabinet to the temperature of regulation, the refrigerant quality that simultaneously utilizes mass measurement system 5 monitorings in heating cabinet to discharge, cold-producing medium is outwards exported by the external reservoir conduit mechanism of refrigerant temperature and flow control system 2, control flow by solenoid valve 11 in process, obtain the information feedback of refrigerant temperature and flow by temperature sensor 9 and pressure detection table, finally, certain mass, uniform temperature, the cold-producing medium of certain pressure is by the release zone of appointment of kapillary 13, then the concentration by measurement of concetration sensor 14 detection of leaks zones feeds back to hydrocarbon refrigerant concentration measurement system 1, measure this regional combustable gas concentration.Determine whether to carry out one-level warning or the secondary warning of explosion limits according to the concentration measured.
certainly above-described embodiment is only explanation technical conceive of the present invention and characteristics, and its purpose is to allow the person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All modifications that the Spirit Essence of main technical schemes is done according to the present invention, within all should being encompassed in protection scope of the present invention.
Claims (5)
1. a household electrical appliance hydrocarbon refrigerant discharges 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 measurement of concetration sensor (14) of described hydrocarbon refrigerant concentration measurement system (1) is external.
2. household electrical appliance hydrocarbon refrigerant according to claim 1 discharges and low explosion limits measurement mechanism, it is characterized in that: described temperature sensor (9) is placed in the gas piping of refrigerant tank outlet annex, and an input pressure detection table (10) is housed detects refrigerant pressure, adopt solenoid valve (11) to control cold-producing medium output, gas piping outside wraps heat-insulation layer, makes the temperature of gas piping inner refrigerant not be subject to the impact of external temperature.
3. household electrical appliance hydrocarbon refrigerant according to claim 1 discharges and low explosion limits measurement mechanism, it is characterized in that: 3 weighing measurement structures of described mass measurement system (5) comprise that three mass sensors (7) are fixed on pallet (8) below, each mass sensor (7) is at a distance of 120 °, measuring accuracy is high, in the situation that quality is 12 kg precision, is ± 0.1g.
4. household electrical appliance hydrocarbon refrigerant according to claim 1 discharges and low explosion limits measurement mechanism, and it is characterized in that: described measurement of concetration sensor (14) is external, by data line and Instrument connection, can be infrared sensor.
5. household electrical appliance hydrocarbon refrigerant according to claim 1 discharges and low explosion limits measurement mechanism, it is characterized in that: it also comprises PLC control system (3), to cold-producing medium output quantity and dual control of time, can monitor the time of the first alarming value and the second alarming value simultaneously.
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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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108088490A (en) * | 2017-12-29 | 2018-05-29 | 律晖智能科技(上海)有限公司 | A kind of 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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| CN108088490A (en) * | 2017-12-29 | 2018-05-29 | 律晖智能科技(上海)有限公司 | A kind of data acquisition device |
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| CN103116005B (en) | 2015-11-11 |
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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 |