CN209372800U - Domestic refrigerator isobutane refrigerant leakage security intelligent test system - Google Patents
Domestic refrigerator isobutane refrigerant leakage security intelligent test system Download PDFInfo
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- CN209372800U CN209372800U CN201821923294.5U CN201821923294U CN209372800U CN 209372800 U CN209372800 U CN 209372800U CN 201821923294 U CN201821923294 U CN 201821923294U CN 209372800 U CN209372800 U CN 209372800U
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Abstract
The Domestic refrigerator of the utility model isobutane refrigerant leakage security intelligent test system, it is characterised in that: test indoor iso-butane simulated leakage device and concentration of isobutane test device including being mounted on explosion-proof environment；Sensor, testboard are also equipped in explosion-proof environment test cabinet；There are also a control rooms, concentration of isobutane detection control apparatus, simulated leakage device control device are installed in control room, simulated leakage device control device connects and controls iso-butane simulated leakage device, and concentration of isobutane detection control apparatus connects and controls concentration of isobutane test device and sensor.The utility model has the beneficial effects that realizing the automation of entire detection process, testing efficiency is improved, and reduces test job intensity.Entire detection process tester does not need to enter test laboratory, reduces the risk that tester comes to harm.With multiple safety protection measure, dangerous generation is prevented.
Description
Technical field
The present invention relates to a kind of Domestic refrigerator isobutane refrigerant leakage security intelligent test systems.
Background technique
Since chlorofluorocarbons is to destroy the substance of ozone layer, in order to protect the living environment, " illiteracy about ozone depleting substances
Paul Tellier protocol " it requires to control all chlorofluorocarbons, the refrigerant containing chlorofluorocarbons has been disapproved for sky now
In the refrigerating appliances such as tune, refrigerator, the new refrigerant for nowadays substituting chlorofluorocarbons is continuously emerged, wherein there is the isobutyl of good environmental-protection function
Alkane refrigerant is used widely in refrigerating appliance.
The major defect of iso-butane is the flammable and explosive of it, when aerial content is 1.8%-8.4%(volume ratio)
When, in case of spark then can burn or explode.Therefore, it to be let out to using the refrigerating appliance of isobutane refrigerant to carry out refrigerant simulation
Security test is leaked, a possibility that burning and explosion is excluded completely.
In safety standard GB 4706.13 " the safe refrigerating appliance of household and similar applications electric appliance, ice river in Henan Province of refrigerating appliance
The particular/special requirement of leaching machine and ice machine " in, it is let out to using the utensil of the combustible refrigerants such as iso-butane to formulate refrigerant simulation
Method for testing security is leaked, but simply shows most basic test method in standard, but specifically how to be practiced without clear
It is required that while now relevant test equipment there are more problems, such as: for test process mainly by manual control, test process is numerous
Miscellaneous, low efficiency, test environment is more dangerous, can not fully meet control requirement of the standard to various parameters in test.
Summary of the invention
In order to compensate for the shortcomings of the prior art, the present invention provides a kind of high degree of automations, esy to use, safe and reliable
Domestic refrigerator isobutane refrigerant leakage security intelligent test system.
The present invention is achieved through the following technical solutions:
A kind of Domestic refrigerator isobutane refrigerant leakage security intelligent test device, it is characterised in that: including
It is mounted on explosion-proof environment and tests indoor iso-butane simulated leakage device and concentration of isobutane test device；
Sensor, testboard are also equipped in explosion-proof environment test cabinet, testboard is for placing Domestic refrigerator to be measured；
There are also a control room, concentration of isobutane detection control apparatus, simulated leakage device control dress are installed in control room
It sets, simulated leakage device control device connects and control iso-butane simulated leakage device, and concentration of isobutane detection control apparatus connects
It connects and controls concentration of isobutane test device and sensor.
Iso-butane simulated leakage device includes environmental cabinet, the iso-butane steel cylinder being placed in environmental cabinet, environmental cabinet connection one
Closed cavity, closed cavity is interior to install electric heater and blower, communicates inside closing chamber sport environmental cabinet, is added electricity by blower
The air of hot device heating is blown into environmental cabinet, heats iso-butane steel cylinder；Iso-butane steel cylinder is sequentially connected cylinder valve through pipeline, cuts
Only valve, pressure gauge, pressure reducing valve, explosion-proof solenoid valve, mass flowmenter, standard butt joint, standard butt joint connect capillary, refrigeration
Agent leads to the position to be simulated of Domestic refrigerator by capillary；Mass flowmenter quality of connection flow controller, control are let out
Leak speed.
Domestic refrigerator isobutane refrigerant leakage security intelligent test device, further includes air conditioning chamber, air-conditioning
Indoor location has air-conditioner set, and air conditioning chamber connects explosion-proof environment test cabinet with explosion-proof fan through pipeline, makes explosion-proof environment test cabinet
Keep constant temperature.
It includes temperature sensor, humidity sensor, gas detector that explosion-proof environment, which tests indoor sensor, and iso-butane is dense
It spends test device and uses isobutane gas detector；Gas detector, detection gas leakage are dangerous.
Explosion-proof fan is installed on the wall of explosion-proof environment test cabinet, connects the external world through explosion-proof fan, works as environmental testing chamber
Isobutane gas concentration it is higher when internal gas is discharged.
Isobutane gas detector is installed in environmental cabinet, prevents gas leakage dangerous.
Concentration of isobutane test device uses isobutane gas detector, and concentration of isobutane test device can be installed and is in
Inside refrigerating appliance, which is mounted in an explosion-proof tank, and minute gas flow pump is also equipped in explosion-proof tank,
Minute gas flow pump connection air inlet pipe and muffler, iso-butane detector are mounted in air inlet pipe, and flow is installed on muffler
Regulating valve, minute gas flow pump are used to import the isobutane gas of test point the concentration determination cavity of iso-butane detector.
Simulated leakage device control device is additionally provided with timer；Explosion-proof solenoid valve is connected by simulated leakage device control device
Control, or connected and controlled by timer；Iso-butane bottom of steel cylinder installs Precision Electronics Balance or weight sensor.
The temperature of environmental cabinet passes through the gas cylinder temperature PID control device control on simulated leakage device control device；Heater
The heating power of heating element is smoothly controlled using zero cross fired type solid-state relay, thus control gas cylinder temperature it is steady on
It rises.
Computer, computer connection control concentration of isobutane detection control apparatus, concentration of isobutane detection are installed in control room
PLC controller is respectively adopted in control device and simulated leakage device control device.
The invention has the advantages that
1, thermostatic control is carried out to gas cylinder using environmental cabinet, that is, hot-air circulating-heating case, heating the temperature inside the box is uniform, full
Sufficient test temperature requirement, realizes to the steady heating of isobutane gas and overheating protection, prevents the overheat explosion danger of gas cylinder；
2, iso-butane high temperature gas cylinder quality is automated by mass flowmenter and Precision Electronics Balance realization accurate
Measurement, during the whole test process monitors gas cylinder quality in real time, reaches the precision of standard requirements；
3, it realizes to isobutane gas leakage rate, feed air temperature, the continuous real-time acquisition for discharging gaseous mass, record, and
It carries out automatically controlling.
4, test environment is monitored and is controlled, realize the emergent alarm to the test state of emergency, processing.
5, automatically-monitored and generating date is realized to entire test process by computer and PLC controller.To
The automation of entire detection process is realized, testing efficiency is improved, and reduces test job intensity.Entire detection process is surveyed
Examination personnel do not need to enter test laboratory, reduce the risk that tester comes to harm.
6, multiple safety protection measure is had, has fully considered the various risks that test process is likely to occur, and take
Corresponding measure prevents dangerous generation.
Detailed description of the invention
Attached drawing is structural schematic diagram of the invention.
Fig. 1 is system composition schematic diagram.
1 explosion-proof environment test cabinet, 2 control rooms, 3 air conditioning chambers, 4 explosion-proof environments test interior sensor, 5 explosion-proof fans, 6
Testboard, 7 simulated leakage devices, 8 explosion-proof fans, 9 air-conditioner sets, 10 computers, 11 concentration of isobutane detect control section, 12 moulds
Quasi- leakage device control section.
Fig. 2 iso-butane simulated leakage device composition schematic diagram.
13 environmental cabinets, 14 electric heaters, 15 blowers, 16 Precision Electronics Balances, 17 iso-butane detectors, 18 iso-butane steel cylinders,
19 cylinder valves, 20 hoses, 21 shut-off valves, 22 pressure gauges, 23 pressure reducing valves, 24 explosion-proof solenoid valves, 25 mass flowmenters, 26 mass
Flow controller, 27 standard copper pipe butt joints, 28 capillaries.
Fig. 3 is pump means structure chart.
29 explosion-proof tanks, 30 tiny flow quantities pump, 17 iso-butane detectors, 31 air inlet pipe, 32 flow control valves, 33 mufflers.
Fig. 4 is concentration of isobutane test device.
Fig. 5 is simulated leakage control device logic chart.
Fig. 6 is concentration of isobutane detection control apparatus logic chart.
Specific embodiment
Attached drawing is a kind of specific embodiment of the invention.
Domestic refrigerator of the invention isobutane refrigerant leakage security intelligent test system, including be mounted on anti-
Iso-butane simulated leakage device 7 and concentration of isobutane test device in quick-fried environmental testing room 1；
Sensor 4, testboard 6 are also equipped in explosion-proof environment test cabinet, testboard is for placing Domestic refrigerator to be measured
Tool；
There are also a control room 2, concentration of isobutane detection control apparatus 11, the control of simulated leakage device are installed in control room
Device 12, simulated leakage device control device connect and control iso-butane simulated leakage device 7, concentration of isobutane detection control dress
It sets connection and controls concentration of isobutane test device and sensor 4.
Iso-butane simulated leakage device 7 includes environmental cabinet 13, the iso-butane steel cylinder 18 being placed in environmental cabinet, and environmental cabinet connects
A closed cavity is connect, electric heater 14 and blower 15 are installed in closed cavity, is communicated inside closing chamber sport environmental cabinet, passes through wind
The air that electric heater heats is blown into environmental cabinet by machine, heats iso-butane steel cylinder；Iso-butane steel cylinder is sequentially connected cylinder valve
19, hose 20, shut-off valve 21, pressure gauge 22, pressure reducing valve 23, explosion-proof solenoid valve 24, mass flowmenter 25, standard butt joint 27,
Standard butt joint connects capillary 28, and refrigerant leads to the position to be simulated of Domestic refrigerator by capillary；Mass flow
Quality of connection flow controller 26 is counted, leakage rate is controlled.
Domestic refrigerator of the invention isobutane refrigerant leakage security intelligent test device, further includes air conditioning chamber
3, air-conditioner set 9 is installed, air conditioning chamber connects explosion-proof environment test cabinet through pipeline and explosion-proof fan 8, makes blast ring in air conditioning chamber
Border test cabinet 1 keeps constant temperature.
It includes temperature sensor, humidity sensor, gas detector, iso-butane that explosion-proof environment, which tests indoor sensor 4,
Concentration determination device uses isobutane gas detector；Gas detector, detection gas leakage are dangerous.
The wall of explosion-proof environment test cabinet 1 is equipped with explosion-proof fan 5, connects the external world through explosion-proof fan, works as environmental testing chamber
Isobutane gas concentration it is higher when internal gas is discharged.
Isobutane gas detector 17 is installed in environmental cabinet, prevents gas leakage dangerous.
Concentration of isobutane test device uses isobutane gas detector, and concentration of isobutane test device is mounted on household system
Cold appliance internal, the iso-butane detector 17 are mounted in an explosion-proof tank 29, and minute gas flow pump is also equipped in explosion-proof tank,
Minute gas flow pump connection air inlet pipe and muffler, iso-butane detector 17 are mounted in air inlet pipe, and stream is installed on muffler
Adjustable valve, minute gas flow pump are used to import the isobutane gas of test point the concentration determination chamber of iso-butane detector
Body.
Simulated leakage device control device is additionally provided with timer；Explosion-proof solenoid valve 24 is by simulated leakage device control device 12
Connection control, or connected and controlled by timer；18 bottom of iso-butane steel cylinder is installed by Precision Electronics Balance or weight sensor.
The temperature of environmental cabinet passes through the gas cylinder temperature PID control device control on simulated leakage device control device 12；Heating
Device smoothly controls the heating power of heating element using zero cross fired type solid-state relay, to control the steady of gas cylinder temperature
Rise.
Computer 10, computer connection control concentration of isobutane detection control apparatus 11, concentration of isobutane are installed in control room 2
PLC controller is respectively adopted in detection control apparatus and simulated leakage device control device 12.
Present invention temperature of iso-butane when refrigerant simulated leakage security test according to specified in standard, leakage quality
It is required that and iso-butane leakage concentration sampling interval require, detect safe sex determination requirement of various concentration etc., propose it is a set of from
Dynamicization intelligent test system completes real-time acquisition, the processing of data, realizes the automation control of test process.
Entire test macro is broadly divided into three parts: iso-butane simulated leakage device, concentration of isobutane test device are explosion-proof
Environmental testing room.
1, iso-butane simulated leakage device
The device can automatically control the leakage implantation quality of iso-butane, leakage injection length, and can accurately control
The temperature of iso-butane gas cylinder.
Simulated leakage device is used to discharge iso-butane to designated position, and damaged leakage occurs to simulate the pipeline at these positions
When the phenomenon that.
Device uses split-type design, and control cabinet is located at outside test cabinet, is operated by control cabinet to equipment, and clock synchronization
Between, the parameters such as temperature are monitored.
Its technical solution are as follows:
(1) gas cylinder heating part
Heating part include gas cylinder equipped with iso-butane, accommodate the environmental cabinet of gas cylinder, the electric heater outside environmental cabinet and
A few part compositions of blower.
Gas cylinder is the steel cylinder equipped with isobutane refrigerant, is realized by electric heating tube, the blower outside environmental cabinet to gas cylinder
Heating, the air near electric heater for heating, hot-air is blown into environmental cabinet, heats to gas cylinder by fan.
The temperature of environmental cabinet controls (PID controller) by " gas cylinder temperature " the PID instrument on control cabinet, temperature range packet
32 DEG C and 70 DEG C of standard requirements are included, control precision is ± 1 DEG C.
Heater smoothly controls electric heating using solid-state relay zero cross fired technology (zero cross fired type solid-state relay)
The heating power of element to control the steady rising of gas cylinder temperature, and is kept constant in test overall process.
(2) leakage control part
User determines the gross mass and leak time of iso-butane leakage according to standard requirements, calculates leakage rate.
The control of leakage rate is realized using high-precision mass flowmeter for small flow and mass flow controller.Mass flow
Settable and display iso-butane flow is counted, flow-controllable range is (0.2 ~ 12) g/min, and control precision is ± 2% reading.
The refrigerant gross mass finally leaked is weighed by high-precision electronic scale and is obtained.High-precision electronic scale is placed in heating
Outside case, pallet is placed on electronic scale by passing through four support columns of gas cylinder bottom portion steel plate, can complete monitoring measurement gas cylinder
Weight.The maximum scale 10kg of electronic scale, precision are ± 0.1g.
The leak time of iso-butane starts timing after pressing test start-stop button by the Timer Controlling on control cabinet,
Iso-butane leakage is automatically stopped at the end of timing.
The exit of gas cylinder is furnished with explosion-proof solenoid valve, can control on control cabinet, or by Timer Controlling, control leakage is opened
Stop.
Refrigerant is guided by capillary to the position to be simulated, and leakage device has the butt joint of standard copper pipe, for connecting
Connect the capillary brass pipe of different size.
(3) security control part
The equipment such as flowmeter are caused danger or damaged to hypertonia in order to prevent, is equipped with one in the front end of explosion-proof solenoid valve
Pressure reducing valve can be adjusted to suitable pressure.
Equipped with one piece of 1.5 stage pressure table, range -0.1 ~ 3.9MPa can show the pressure in the bottle.
Combustable gas concentration detector is set by heater box, and combustable gas concentration detector connects combined aural and visual alarm, prevents
Nearby gas cylinder, pipeline gas leakage cause danger to heater box, when concentration is more than 25%LEL alarm, when more than 50%LEL, and cutting release
The power supply of device.
Temperature overheating protective device is equipped in environmental cabinet, when temperature overheating occurs, the PLC controller in control cabinet is automatic
Electric heating power supply and fan power are cut off, it is dangerous to prevent gas cylinder overheat from generating.
Control cabinet, which is equipped with scram button, can cut off the power supply of whole system when emergency safety accident occurs.
2, concentration of isobutane test device
The device can carry out the above online concentration determination for 24 hours to isobutane gas, can pass through computer interface and correlation
Software is controlled, test data is uploaded to computer, saves on computers, show test data, curve.Computer, iso-butane
Concentration Testing control, pump means are sequentially connected.
Its technical solution are as follows:
(1) concentration of isobutane detection part
Using dual wavelength infrared type isobutane gas detector, the above online Concentration Testing for 24 hours is carried out to isobutane gas.
Certain test position gas detecting instruments possibly can not be placed in test point when to solve the problem of actual test, design
Pump desorption system, for the isobutane gas of test point to be pumped to the concentration determination chamber for importing gas detecting instrument by tiny flow quantity
Body.
Pump means uses Explosion-proof Design, is mountable to simulated leakage test site, and be equipped with flow display device, pump is inhaled
Flow 0-2L/min is adjustable.
To reduce influence of the pump desorption system to test position air, it is designed as portable pump means, when test, pump inhales dress
The placement location set shortens pump means length of pipe as close as possible to test zone, vapor return pipeline is had, by the gas of sucking
Body is re-released into sucking position.
(2) concentration of isobutane detects control section
Control section can connect multiple Concentration Testing parts, acquire and show the test data of each detection part, and upper
Position machine carries out data communication, and is responsible for the operation of control explosion-proof environment test cabinet.
Input interface: the input signals such as 4 4-20mA gas detecting instruments, signals output by multi-circuit relay can be connected.
Data acquisition and display: reading the data of each detection part by RS232 interface, shows data
The control of explosion-proof environment test cabinet: the operation and closing of the equipment such as the explosion-proof fan, air door, acousto-optic of test cabinet are controlled.
Host computer communication: the various logouts that will be generated in test data and test process, by RS232 mouthfuls (or
Person other interfaces) it is uploaded to host computer, the instruction that host computer transmits is received, and according to the work of instruction control detection part.
(3) data processing section
By computer interface and associated control software, it will test data and be uploaded to computer, can save on computers,
It shows test data, curve, and test data is analyzed, is handled.
3, explosion-proof environment test cabinet
It for guarantee test facility personnel, the safety of equipment, prevents test site concentration of isobutane is excessively high from causing danger, to examine
Explosion-proof, the antistatic spark for considering test site prevent from leading to fire, explosion danger non-test region concentration of isobutane is excessively high.
It comprises the following structure.
1 explosion-proof environment test cabinet, 2 control rooms, 3 air conditioning chambers, 4 explosion-proof environments test interior sensor (including iso-butane gas
Bulk detector, environment humidity sensor etc.), 5 explosion-proof fans (are arranged when the isobutane gas concentration of environmental testing chamber is higher
Internal gas out), 6 testboards, 7 explosion-proof fans (are connected, control the temperature and humidity of environment test cabinet) with air conditioning chamber, 8 air-conditioner sets.
It is set in explosion-proof environment test cabinet there are two isobutane gas detector, is respectively placed in test cabinet two sides, and be equipped with anti-
Quick-fried blower, air door.Isobutane gas detector and concentration of isobutane detection control section are connected, can be at any time in monitoring and test room
Isobutane gas concentration it is whether exceeded: when isobutane gas detector detects that isobutane gas reaches 25% low quick-fried limit value,
Control circuit automatically turns on air door, but does not cut off power supply.When to detect that isobutane gas concentration reaches 50% low quick-fried for detector
When limit value, control circuit opens explosion-proof fan on the basis of opening air door, and discharge test cabinet includes the sky of isobutane gas
Gas, while combined aural and visual alarm is opened, it is exceeded that interior isobutane gas is tested in warning, and cuts off in test cabinet and own in addition to explosion protection system
Power supply guarantees the safety of test indoor equipment.
After equipment alarm automatically terminates, power supply will not be exported again automatically by testing indoor power supply, need manual confirmation
Equipment is opened according still further to Normal Mode Operation afterwards.
As a part of explosion-proof environment test cabinet, it is equipped with individual air conditioning chamber on the outside, the inside is equipped with air-conditioner set,
To adjust the ambient temperature and humidity of explosion-proof environment test cabinet, it is connected to by explosion-proof fan with explosion-proof environment test cabinet.
4 gas detectors are had in the present invention, are not to be all placed in explosion-proof tank, only one is placed on explosion-proof tank
It is interior, for detecting the concentration of isobutane of test position.Two in the other three are placed in explosion-proof environment test cabinet, are Fig. 1
Concentration of isobutane in environment is tested in a part of middle explosion-proof environment test interior sensor 4, detection, judges to detect whether environment is deposited
In explosion danger, controls explosion-proof environment test cabinet explosion-proof fan and air door (is not drawn into) start and stop in figure, the last one is placed on simulation
On leakage device, iso-butane detector 17 in Fig. 2, its effect is whether sensing gas cylinder nearby has refrigerant leakage, and root
It is discharged according to needing to provide alarm, stopping gas cylinder.
The effect of testboard 6 is to put tested model machine.
Whole system amounts to two PLC, and one is mounted in simulated leakage control device, with timer, temperature controller, mould
Gas detector on quasi- leakage device etc. peripheral components control the operation of simulated leakage device together.Another PLC is mounted in
On concentration of isobutane detection control apparatus, the concentration sensor reading in explosion-proof tank, control pump means operation are read, and be responsible for
With PC compunlcation.
Use process is as follows.
Refrigerator is placed in refrigerator working condition tests room test angles or testing stand by normal operating conditions, putting for refrigerator is answered
Pay attention to testing it in the position freely divulged information, avoids influence of the Forced Convection Air to test result.It should also be noted that keeping away
Non-leaking and test position are excessively close with the flammable agent detector of room environment flammable agent detector and release device, with
Exempt from false alarm, malfunction.
By standard requirements confirmation simulated leakage experiment position and leakage concentration determination position, selected according to combustible refrigerant type
With corresponding dual wavelength infrared type gas detecting instrument and refrigerant gas cylinder, according to simulated leakage test position, choose whether using
Pump means (if test position can not place dual wavelength infrared type gas detecting instrument, uses pump means, suction pipe is fixed
In test position), when testing under needing sample to be powered on state, get out sample power supply.Check infrared-gas inspection
The connection of instrument and mating gas detection alarm controller and computer is surveyed, and accesses power supply, runs the monitoring programme on computer.
It is required according to clause, gas cylinder temperature, the burst size of validation test, release time calculate rate of release, by can
It fires refrigerant simulated leakage experimental rig and carries out related setting, fix capillary (necessity on point of release in the refrigerator of confirmation
When, it need to be before refrigerator foaming, pre-buried capillary), the inspection of dual wavelength infrared type gas is placed in test point in the refrigerator of confirmation
Survey instrument or pump suction pipe mouth.
Concrete operations process is as follows.
1. interfacility link correctly to be connected to (the male and female end slot mouth alignment for paying attention to aviation plug)
2 close the air switch in equipment Electric Appliance Cabinet；
3. opening equipment control power supply (key switch)；
4. connection capillary (22.107.1 must connect Φ 0.7mm capillary, other tests, according to rate of release size,
Select suitable capillary)
5. ensuring that gas cylinder pipeline has connected, gas cylinder is placed on electronic scale, carries out weighing preparation, opens system cut-off
Valve；Notice that electronic scale needs to level, set 0, makes to show data stabilization.
6. pressure reducing valve is adjusted to 0.2MPa or so when leaving the factory, not in special circumstances without adjustment；(notes: subtracting
The pressure of pressure valve is absolutely unable to adjust to 1MPa or more, and otherwise mass flowmenter can be damaged because of pressure superelevation！)
7. refrigerant burst size as needed, sets flow number by mass flow controller.
8. flow number setting method: after powering on, the SETPT button in the upper right corner is pressed on its panel, into gas per minute
The setting of body burst size, unit is that the SELECT PT button in the upper right corner g/min. is shifting decimal point button, UP and DOWN button is
The plus-minus for carrying out numerical value, after setting, then clicks the SET button in the lower right corner, i.e. setting finishes.
Release time is set by determining timer；The button of primary corresponding numerical digit is often pressed, numerical value is circularly set.
9. refrigerant temperature (32 DEG C ± 1 DEG C and 70 DEG C ± 1 DEG C) as needed adjusts the setting value of gas cylinder thermometer；
(omitting this step if without temperature requirement)
Temperature value setting method: after pressing SET button, setting value starts to beat, then adjusts key head button up and down, is counted
The adduction of value subtracts, and after finally pressing SET button again, numerical value is set successfully.(4 small buttons in the lower left corner, not operate, unless
It is necessary to change temperature alarm desired temperature).
10. pressing the environment start-stop button on control cabinet, waiting temperature stability contorting is in setting value；It (is such as wanted without temperature
It asks, omits this step)
12, the test start-stop button on control cabinet is pressed to start to discharge refrigerant；
12. stopping release refrigerant after reaching timer setting time；
13. obtaining the refrigerant burst size of this test again to gas cylinder weighing；
14. closing environment temperature control by environment start-stop button again；(as there is no temperature requirement and being not turned on environment
Start-stop button then omits this step)
15. closing system shut-off valve；
16. closing combustible refrigerant release device equipment general supply；(notes: please be incite somebody to action when not doing experiment or after the completion of test
General supply is closed, because when mass flowmenter does not have gas to pass through and mass flow controller is non-zero setting value, when too long
Between be powered mass flowmenter valve can be made to open to the maximum state always, it is possible to cause valve body overheat and damage！)；
17. the air switch in pass hull closure Electric Appliance Cabinet.
Claims (10)
1. a kind of Domestic refrigerator isobutane refrigerant leakage security intelligent test device, it is characterised in that: including peace
Indoor iso-butane simulated leakage device and concentration of isobutane test device are tested mounted in explosion-proof environment；
Sensor, testboard are also equipped in explosion-proof environment test cabinet, testboard is for placing Domestic refrigerator to be measured；
There are also a control room, concentration of isobutane detection control apparatus, simulated leakage device control device, mould are installed in control room
Quasi- leakage device control device connects and controls iso-butane simulated leakage device, and concentration of isobutane detection control apparatus is connected and controlled
Concentration of isobutane test device processed and sensor.
2. Domestic refrigerator according to claim 1 isobutane refrigerant leakage security intelligent test device,
Be characterized in that: iso-butane simulated leakage device includes environmental cabinet, the iso-butane steel cylinder being placed in environmental cabinet, environmental cabinet connection one
Closed cavity, closed cavity is interior to install electric heater and blower, communicates inside closing chamber sport environmental cabinet, is added electricity by blower
The air of hot device heating is blown into environmental cabinet, heats iso-butane steel cylinder；Iso-butane steel cylinder is sequentially connected cylinder valve through pipeline, cuts
Only valve, pressure gauge, pressure reducing valve, explosion-proof solenoid valve, mass flowmenter, standard butt joint, standard butt joint connect capillary, refrigeration
Agent leads to the position to be simulated of Domestic refrigerator by capillary；Mass flowmenter quality of connection flow controller, control are let out
Leak speed.
3. Domestic refrigerator according to claim 1 or 2 isobutane refrigerant leakage security intelligent test device,
It is characterized by also including air conditioning chamber, air-conditioner set is installed in air conditioning chamber, air conditioning chamber connects through pipeline with explosion-proof fan explosion-proof
Environmental testing room makes explosion-proof environment test cabinet keep constant temperature.
4. Domestic refrigerator according to claim 1 or 2 isobutane refrigerant leakage security intelligent test device,
It is characterized by: it includes temperature sensor, humidity sensor, gas detector, isobutyl that explosion-proof environment, which tests indoor sensor,
Alkane concentration determination device uses isobutane gas detector；Gas detector, detection gas leakage are dangerous.
5. Domestic refrigerator according to claim 1 or 2 isobutane refrigerant leakage security intelligent test device,
It is characterized by: being equipped with explosion-proof fan on the wall of explosion-proof environment test cabinet, the external world is connected through explosion-proof fan, when environmental testing room
Internal gas is discharged when higher in interior isobutane gas concentration.
6. Domestic refrigerator according to claim 2 isobutane refrigerant leakage security intelligent test device,
It is characterized in that: isobutane gas detector is installed in environmental cabinet, prevent gas leakage dangerous.
7. Domestic refrigerator according to claim 1 or 2 isobutane refrigerant leakage security intelligent test device,
It is characterized by: concentration of isobutane test device uses isobutane gas detector, the installation of concentration of isobutane test device is in
Inside refrigerating appliance, which is mounted in an explosion-proof tank, and minute gas flow pump is also equipped in explosion-proof tank,
Minute gas flow pump connection air inlet pipe and muffler, iso-butane detector are mounted in air inlet pipe, and flow is installed on muffler
Regulating valve, minute gas flow pump are used to import the isobutane gas of test point the concentration determination cavity of iso-butane detector.
8. Domestic refrigerator according to claim 1 or 2 isobutane refrigerant leakage security intelligent test device,
It is characterized by: simulated leakage device control device is additionally provided with timer；Explosion-proof solenoid valve is by simulated leakage device control device
Connection control, or connected and controlled by timer；Iso-butane bottom of steel cylinder installs Precision Electronics Balance or weight sensor.
9. Domestic refrigerator according to claim 2 isobutane refrigerant leakage security intelligent test device,
Be characterized in that: the temperature of environmental cabinet passes through the gas cylinder temperature PID control device control on simulated leakage device control device；Heater
The heating power of heating element is smoothly controlled using zero cross fired type solid-state relay, thus control gas cylinder temperature it is steady on
It rises.
10. Domestic refrigerator according to claim 1 or 2 isobutane refrigerant leakage security intelligent testing trial assembly
It sets, it is characterised in that: computer is installed, computer connection controls concentration of isobutane detection control apparatus, and iso-butane is dense in control room
PLC controller is respectively adopted in degree detection control apparatus and simulated leakage device control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821923294.5U CN209372800U (en) | 2018-11-21 | 2018-11-21 | Domestic refrigerator isobutane refrigerant leakage security intelligent test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821923294.5U CN209372800U (en) | 2018-11-21 | 2018-11-21 | Domestic refrigerator isobutane refrigerant leakage security intelligent test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459532A (en) * | 2018-11-21 | 2019-03-12 | 山东省计量科学研究院 | Domestic refrigerator isobutane refrigerant leakage security intelligent test system |
| CN111599245A (en) * | 2020-06-19 | 2020-08-28 | 抚顺抚运安仪救生装备有限公司 | Training equipment for simulating dangerous chemical leakage |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459532A (en) * | 2018-11-21 | 2019-03-12 | 山东省计量科学研究院 | Domestic refrigerator isobutane refrigerant leakage security intelligent test system |
| CN109459532B (en) * | 2018-11-21 | 2024-02-06 | 山东省计量科学研究院 | Isobutane refrigerant leakage safety intelligent test system for household refrigeration appliance |
| CN111599245A (en) * | 2020-06-19 | 2020-08-28 | 抚顺抚运安仪救生装备有限公司 | Training equipment for simulating dangerous chemical leakage |
| CN111599245B (en) * | 2020-06-19 | 2022-02-18 | 抚顺抚运安仪救生装备有限公司 | Training equipment for simulating dangerous chemical leakage |
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