CN2720545Y - Refrigerator fault setting and principle demonstration experiment table - Google Patents
Refrigerator fault setting and principle demonstration experiment table Download PDFInfo
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- CN2720545Y CN2720545Y CN 200420052114 CN200420052114U CN2720545Y CN 2720545 Y CN2720545 Y CN 2720545Y CN 200420052114 CN200420052114 CN 200420052114 CN 200420052114 U CN200420052114 U CN 200420052114U CN 2720545 Y CN2720545 Y CN 2720545Y
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Abstract
The utility model provides a refrigerator fault setting and principle demonstration experiment table, comprising an experiment table, a refrigeration system and an electrical control circuit. The relevant position of the refrigeration system is also provided with a refrigerant valve, a dirt blockage valve, an ice blockage valve, a full blockage valve, a jamming valve and a closing valve of a valve core which are used to install and demonstrate seven refrigeration faults. The refrigerant valve is also connected with a liquid-storage pot. The control coils of the six valves are respectively connected on the corresponding output ends of the receiving circuits of infrared ray. The relevant position of the electrical control circuit is also provided with normally open contacts of failure of a temperature control failure, normally open contacts of burning short circuit of a PTC circuit, normally closed contacts of failure break of a PTC circuit, normally closed contacts of break of a compressor motor, normally closed contacts of damage of a fan, normally closed contacts of break of an electromagnetic valve, normally closed contacts of failure of a defrost timer defrost timer motor, normally closed contacts of failure of a defrost temperature control device and normally closed contacts of failure of a defrost heat-protective device which are controlled by an infrared ray controller. The refrigerator fault setting and principle demonstration experiment table is covert and rapid to install the faults and convenient to demonstrate without polluting the environment.
Description
Technical field
The utility model belongs to the refrigerator technical field, more particularly relates to the improvement of setting of refrigerator fault and principle demonstration experiment table.
Background technology
Cooling cycle system only can be provided with simple faults such as " system jams " in traditional refrigerator experiment table, and function is complete inadequately, and the method for employing generally is manual mode (manually-operated gate).When fault being set or fixing a breakdown, because the valve peripheral hardware on these pipelines, the learner is very easy to find the position of these trouble spots, judges failure cause, is unfavorable for the cultivation of learner's analysis ability and thinking ability.And the setting of fault is trouble, and phenomenon of the failure is not accurate enough.In addition, traditional household electric refrigerator experiment table needs to cause atmospheric pollution to the unnecessary cold-producing medium of airborne release when the fault of " cold-producing medium shortage " is set, and destroys the human living environment and the ecologic equilibrium.
Summary of the invention
The purpose of this utility model, just be to overcome above-mentioned shortcoming and defect, the utilization Infrared Ray Remote Control Technology, provide a kind of fault setting very hidden, can finish the setting and the eliminating of breakdown of refrigeration system and electrical malfunction in moment, operating, demonstrate convenient, free from environmental pollution again refrigerator fault is provided with and the principle demonstration experiment table.
In order to achieve the above object, the utility model comprises refrigeration system and the electric control circuit of being made up of the compressor, condenser, device for drying and filtering, two-position three way magnetic valve and the reefer kapillary that is connected with the outlet B of two-position three way magnetic valve that connect successively, the refrigerator evaporator that is connected with the reefer kapillary, the refrigerating chamber kapillary that is connected with the outlet C of two-position three way magnetic valve, the freezer evaporator that is connected with the refrigerating chamber kapillary.Refrigerator evaporator is connected with compressor with freezer evaporator series connection back.Refrigeration system and electric control circuit are installed on the experiment table.The outlet of condenser also is connected with refrigerant valve and receiver.Also connecting dirty blocking valve between condenser and the device for drying and filtering, also connecting ice block valve between reefer kapillary and the refrigerator evaporator, also connecting whole block valve between the outlet B of two-position three way magnetic valve and the reefer kapillary, also be connected between the outlet B of the outlet of condenser and two-position three way magnetic valve with kapillary and blocking valve.Also connecting the valve core draught excluder between the import A of two-position three way magnetic valve and the outlet C.Above-mentioned refrigerant valve, dirty blocking valve, ice block valve, whole block valve, blocking valve and valve core draught excluder are solenoid valve, its control coil is connected on the corresponding output end of infrared radiation receiving circuit, the control signal of infrared radiation receiving circuit receiving infrared-ray radiating circuit.
Infrared transmitter is made up of oscillator, the power amplifier that is connected with oscillator, the infrared head that is connected with power amplifier and power supply and switch.Prime amplifier that infrared radiation receiving circuit is connected with infrared receiving terminal by infrared receiving terminal and power supply and switch are constituted.The output of prime amplifier is connected with the coil of a plurality of solenoid valves and relay respectively.
Temperature controller inefficacy normally opened contact in the two ends parallel connection of the refrigerating chamber temperature controller in the electric control circuit, with demonstration temperature controller failure of removal.The two ends parallel connection of PTC starter PTC and is burnt the short circuit normally opened contact, and PTC burns or short trouble with demonstration.The PTC that connecting between PTC starter and the power supply normally closed contact that opens circuit that lost efficacy, PTC lost efficacy or open circuit fault with demonstration.The compressor electric motor winding of connecting between compressor and the irritated overheat protector normally closed contact that opens circuit is with demonstration compressor electric motor open circuit fault.The fan of connecting between fan and the button thereof damages normally closed contact, damages fault with the demonstration fan.The electromagnetic valve coil of connecting between two-position three way magnetic valve and the power supply normally closed contact that opens circuit is with demonstration electromagnetic valve coil open circuit fault.The frost removal timer motor inefficacy normally closed contact of connecting between frost removal timer motor and the defrosting heater is with demonstration frost removal timer motor failure of removal.The defrost temperature controller inefficacy normally closed contact of connecting between defrost temperature controller and the defrosting heater is with demonstration defrost temperature controller failure of removal.The defrost thermal protector inefficacy normally closed contact of connecting between temperature fuse and the power supply is with demonstration defrost thermal protector failure of removal.Above-mentioned two normally opened contacts and 7 normally closed contacts are respectively the contact of the corresponding relay of infrared radiation receiving circuit, by this corresponding relay control.Compressor, condenser, kapillary, device for drying and filtering, two-position three way magnetic valve, evaporator are made up of common household electric refrigerator parts.
The function of infrared transmitter is the emission infrared light beam, selects different buttons can send different command signals, that is infrared remote controller.The function of infrared radiation receiving circuit is to receive the infrared signal that is sent by infrared transmitter, after identification is amplified, passes to by circuit and is attached thereto each solenoid valve that connects or the coil of relay, thereby control its action.Infrared transmitter can be used the common TV set remote-controller, and infrared radiation receiving circuit is installed on the refrigerator malfunction test platform, and solenoid valve then is installed in each position and the receiver exit of refrigeration system of refrigerator pipeline.
In use, when infrared transmitter (telepilot) sends different signals, after infrared radiation receiving circuit identification is amplified, the action of control corresponding solenoid valve.When telepilot sends signal and gives the solenoid valve at capillary outlet place in the refrigeration system of refrigerator, close through 2 minutes rear electromagnetic valves, just form " ice is stifled " fault; Give another signal again, solenoid valve is opened, and it is unimpeded that pipeline recovers, and then fault is got rid of.When telepilot sent signal and gives the solenoid valve of device for drying and filtering porch in the refrigeration system of refrigerator, this closed electromagnetic valve just formed " dirty stifled " fault; Give another signal again, solenoid valve is opened, and it is unimpeded that pipeline recovers, and then fault is got rid of.When telepilot sends signal and gives the solenoid valve at receiver jar mouth place in the refrigeration system of refrigerator, this solenoid valve opens and closes, in refrigeration system, increase or reduce the flow of refrigerant liquid, thereby can form the too much or very few phenomenon of the failure of refrigerant charge in the refrigeration system of refrigerator.With the solenoid valve at telepilot control receiver jar mouth place, also can be the refrigerant-recovery in the refrigeration system in receiver, in order to the refrigerant-recovery technology of demonstration refrigeration plant.
The temperature controller of control circuit system lost efficacy, the PTC starter burns short circuit, the PTC starter lost efficacy opens circuit, the compressor electric motor Inside coil opens circuit, fan electromotor damages or the loose contact of fan microswitch, two-position three way valve coil are opened circuit, the frost removal timer motor coil opens circuit or (contact adhesion), the defrost temperature controller lost efficacy (opening circuit), the defrost thermal protector lost efficacy electric faults such as (opening circuit) setting are not changed in the frost removal timer contact; can make short circuit or open circuit by the break-make that relay is set up in control, thereby form the phenomenon of the failure that will be provided with.
The utility model be in setting of electricity consumption breakdown of refrigerator and principle demonstration aspect, a kind of infrared ray automatic control technology is provided, and it is provided with automatically by remote control thereof and gets rid of the refrigerator most common failure, and teaching demonstration is simple and convenient, the automaticity height, the fault setting is more complete.When the fault of demonstration " cold-producing medium shortage ", no cold-producing medium drains into air, possesses the environmental protection characteristics.Thereby making fault in refrigerator fault setting in the past and the principle demonstration that problems such as trouble, phenomenon of the failure are inaccurate, atmosphere pollution are set is effectively solved.
Description of drawings
Fig. 1 is the synoptic diagram of the utility model refrigeration system.
Fig. 2 is the schematic diagram of its control circuit.
Fig. 3 is the schematic diagram of its infrared transmitter.
Fig. 4 is the schematic diagram of its infrared radiation receiving circuit.
Embodiment
Embodiment 1.A kind of refrigerator fault is provided with and the principle demonstration experiment table, as Fig. 1～shown in Figure 4.It comprises refrigeration system, fan 9 and the electric control circuit of being made up of the compressor 1, condenser 2, device for drying and filtering 3, two-position three way magnetic valve 4 and the reefer kapillary 5 that is connected with the outlet B of two-position three way magnetic valve 4 that connect successively, the refrigerator evaporator 6 that is connected with reefer kapillary 5, the refrigerating chamber kapillary 7 that is connected with the outlet C of two-position three way magnetic valve 4, the freezer evaporator 8 that is connected with refrigerating chamber kapillary 7.Refrigerator evaporator 6 is connected with compressor 1 with freezer evaporator 8 series connection backs.Refrigeration system and electric control circuit are installed on the experiment table.The outlet of condenser 2 also is connected with refrigerant valve 10 and fluid reservoir 11.Also connecting dirty blocking valve 12 between condenser 2 and the device for drying and filtering 3, also connecting ice block valve 13 between reefer kapillary 5 and the refrigerator evaporator 6, also connecting whole block valve 14 between the outlet B of two-position three way magnetic valve 4 and the reefer kapillary 5, also be connected between the outlet B of the outlet of condenser 2 and two-position three way magnetic valve 4 with kapillary 15 and blocking valve 16.Also connecting valve core draught excluder 17 between the import A of two-position three way magnetic valve 4 and the outlet C.Above-mentioned refrigerant valve 10, dirty blocking valve 12, ice block valve 13, whole block valve 14, blocking valve 16 and valve core draught excluder 17 are solenoid valve, and its control coil is connected on the corresponding output end 18 of infrared radiation receiving circuit.The control signal of infrared radiation receiving circuit receiving infrared-ray radiating circuit emission.
Infrared transmitter is made up of oscillator 19, the power amplifier 20 that is connected with oscillator 19, the infrared that is connected with power amplifier 20 21 and power supply 22 and switch 23.Infrared radiation receiving circuit is made of infrared receiving terminal 24, the prime amplifier 25 that is connected with infrared receiving terminal 24 and power supply 26 and switch 27.The output 18 of prime amplifier 25 is connected with the coil of a plurality of solenoid valves and relay respectively.
The method to set up and the mechanism of mechanical part fault are as follows:
Cold-producing medium lacks.Press the button (1) of infrared remote controller, after the normally closed refrigerant valve 10 on the receiver 11 was opened, again by button (2) (system all stop up often open whole block valve 14 action back shutdown systems) and make compressor 1 work, cold-producing medium entered receiver 11.Then, make refrigerant valve 10 on the receiver 11 close (again by one-touch (15)) again, make system's whole block valve 14 open (again by one-touch (15)), compressor 1 remains in operation.Reduce owing to participate in the round-robin cold-producing medium in the system, can judge " cold-producing medium shortage " fault with condenser 2 temperature presentation on the low side by evaporator 6 anterior frosting rear portions are frostless.
Cold-producing medium is excessive.Press the button (1) of infrared remote controller, the refrigerant valve 10 on the receiver 11 is open-minded, and the cold-producing medium in the fluid reservoir 11 enters refrigeration system under the effect of the pressure of fluid reservoir own.After about 1 minute, close the refrigerant valve 10 on the receiver, make compressor operating.Increase owing to participate in the round-robin cold-producing medium in the system, the phenomenon such as overheated and compressor 1 air intake duct frosting by evaporator 6 anterior frost-free rear portion frostings, condenser 2, it is excessive to be judged as cold-producing medium.
Refrigeration system " dirty stifled " (refrigeration system is partly stopped up).Press the button (3) of infrared remote controller, the dirty blocking valve 12 of often opening between device for drying and filtering 3 and the condenser 2 is closed, the obstructed super-dry filtrator 3 of cold-producing medium and by the kapillary 15 in parallel with device for drying and filtering 3.Because the throttling action of this kapillary 15, the two ends of filtrator 3 have tangible temperature difference, evaporator 6 anterior frosting rear portion frost-frees.By these phenomenons, can judge the dirty stifled or components of system as directed obstruction of system.
Refrigeration system " ice is stifled ".Press the button (4) of infrared remote controller, often holding ice block valve 13 and can after 2 minutes, close at the kapillary rear portion of system.By the phenomenon of " freeze during start normally, do not freeze after a few minutes ", can block up by judgement system ice.
Refrigeration system is stifled entirely.Press the button (2) of infrared remote controller, often open whole block valve 14 actions accordingly, system is whole obstructions.Open compressor 1, presentation such as not hot from condenser 2, that evaporator is not cold, compressor 1 is overheated, it is stifled entirely to be judged as refrigeration system.
Two position three-way valve 4 does not commutate.Press the button (13) of infrared remote controller, the blocking valve in parallel 16 with two position three-way valve 4 normal open walks electric after, the normally closed passage of this solenoid valve is opened., reefer temperature controller low excessively, icing action, two position three-way valve 4 by the reefer room temperature refrigerator evaporator porch capillaceous, electric back temperature still is higher than room temperature and can be judged as two position three-way valve 4 and commutate.
The not thorough or bad sealing of two position three-way valve 4 commutations.Press button (13), (14) of infrared remote controller, two solenoid valves in parallel with two position three-way valve 4 normally closed passages and in parallel with two position three-way valve 4 normal open walks get electric after, the normally closed valve core draught excluder 17 of this two solenoid valve is opened.Can be judged as the not thorough or bad sealing of two position three-way valve 4 commutations by phenomenons such as reefer temperature controller action back reefer room temperature are low excessively, icing.Freezer evaporator porch capillaceous temperature still is not higher than room temperature and can be judged as the two position three-way valve bad sealing when moving (reefer does not reach design temperature) by the reefer temperature controller,
Temperature controller inefficacy normally opened contact 29 in the two ends parallel connection of the refrigerating chamber temperature controller 28 in the electric control circuit, with demonstration temperature controller failure of removal.The 30 two ends parallel connections of PTC starter PTC and are burnt short circuit normally opened contact 31, and PTC burns or short trouble with demonstration.The PTC that connecting between PTC starter 30 and the power supply 32 normally closed contact 33 that opens circuit that lost efficacy, PTC lost efficacy or open circuit fault with demonstration.The compressor electric motor winding of connecting between compressor 1 and the irritated overheat protector 34 normally closed contact 35 that opens circuit is with demonstration compressor electric motor open circuit fault.The fan of connecting between fan 9 and the button 36 thereof damages normally closed contact 37, damages fault with the demonstration fan.The electromagnetic valve coil of connecting between two-position three way magnetic valve 4 and the power supply 32 normally closed contact 38 that opens circuit is with demonstration electromagnetic valve coil open circuit fault.The frost removal timer motor inefficacy normally closed contact 41 of connecting between frost removal timer motor 39 and the defrosting heater 40 is with demonstration frost removal timer motor failure of removal.The defrost temperature controller inefficacy normally closed contact 43 of connecting between defrost temperature controller 42 and the defrosting heater 40 is with demonstration defrost temperature controller failure of removal.Temperature fuse 44 and the power supply 32 defrost thermal protector inefficacy normally closed contact 45 of connecting is with demonstration defrost thermal protector failure of removal.Above-mentioned two normally opened contacts and 7 normally closed contacts are respectively the contact of the corresponding output relay of infrared radiation receiving circuit, by this corresponding relay control.
The method to set up and the mechanism of embodiment 1 electric part fault are as follows:
PTC starter 30 burns short circuit.Press the button (6) of infrared remote controller, the PTC in parallel with PTC burns short circuit normally opened contact 31 closures.According to excessive, the serious heating of compressor 1 running current, operation sound after undesired, a few minutes the compressor thermal protector action make that compressor stops to start, phenomenons such as compressor begins again to restart after a few minutes, can judge that PTC starter 30 burns short circuit or compressor electric motor Inside coil layer short circuit.
PTC starter 30 lost efficacy and opened circuit.Press the button (7) of infrared remote controller, the lost efficacy normally closed contact 33 that opens circuit of the PTC that connects with PTC disconnects.According to compressor " drone " ring, can not start, the compressor thermal protector action makes compressor stop phenomenons such as startups after a few minutes, can judge that 30 inefficacies of PTC starter open circuit.
Compressor 1 motor internal coil opens circuit.Press the button (8) of infrared remote controller, open circuit normally closed contact 35 of the compressor electric motor winding of connecting with compressor electric motor 1 common tap disconnects.From being arranged, phenomenons such as electricity, compressor be noiseless can judge that compressor electric motor 1 Inside coil opens circuit.
Fan 9 motors damage or fan 9 microswitch loose contacts.Press the button (9) of infrared remote controller, the fan of connecting with fan 9 motors damages normally closed contact 37 and disconnects.Do not have phenomenons such as cold wind, the refrigerating chamber refrigeration is bad, the white layer of freezer evaporator is blocked up by refrigerating chamber and can judge that fan electromotor damages or the loose contact of fan microswitch.
Two position three-way valve 4 coils open circuit.Press the button (10) of infrared remote controller, open circuit normally closed contact 38 of the electromagnetic valve coil of connecting with two position three-way valve 4 disconnects.Can be judged as the two-position three way valve coil by phenomenons such as the reefer room temperature are low excessively, icing opens circuit.
Frost removal timer motor 39 coils open circuit or (contact adhesion) do not changed in frost removal timer 46 contacts.Press the button (11) of infrared remote controller, the frost removal timer motor inefficacy normally closed contact 41 of connecting with frost removal timer motor 39 disconnects.Bad by not defrost, refrigerating chamber refrigeration, the white layer of freezer evaporator is blocked up, phenomenon such as beginning defrost can judge that the frost removal timer motor coil opens circuit or (contact adhesion) do not changed in the frost removal timer contact behind the clockwise shearing frost removal timer release handle.
Defrost temperature controller 42 lost efficacy (opening circuit).Press the button (11) of infrared remote controller, the defrost temperature controller inefficacy normally closed contact 43 of connecting with defrost temperature controller 42 disconnects.Bad by not defrost, refrigerating chamber refrigeration, the white layer of freezer evaporator is blocked up, behind the clockwise shearing frost removal timer release handle still phenomenon such as not defrost can judge that defrost temperature controller 42 lost efficacy (opening circuit).
Defrost thermal protector 44 (being temperature fuse 44) lost efficacy (opening circuit).Press the button (12) of infrared remote controller, the defrost thermal protector normally closed contact 45 of connecting with defrost thermal protector 44 disconnects.By compressor after the defrost do not restart, phenomenon such as compressor starts running can judge that the defrost thermal protector lost efficacy (opening circuit) behind the clockwise shearing frost removal timer release handle.
Above fault needs only the button of pressing again on the infra-red remote control mobile phone (15) if will get rid of, and fault can be got rid of in moment.
In the present embodiment; electrical equipments such as the temperature controller of control circuit system, PTC starter, compressor, fan electromotor, two position three-way valve, frost removal timer, defrost temperature controller, defrost thermal protector, solenoid valve, relay adopt the domestic refrigerator element, according to refrigerator requirement and two-circuit frost-free type refrigerator electric part fault figure are set and are connected and installed on the experiment table.
Embodiment 1 is that two-circuit frost-free type refrigerator fault is provided with and the principle demonstration experiment table.It is hidden, quick that it is provided with fault, and demonstration is convenient, and is free from environmental pollution.But wide popularization and application is in the demonstration of refrigerator principle and maintenance, teaching.
Claims (3)
1. a refrigerator fault is provided with and the principle demonstration experiment table, it comprises the compressor that connects by successively, condenser, device for drying and filtering, two-position three way magnetic valve and the reefer kapillary that is connected with the outlet B of two-position three way magnetic valve, the refrigerator evaporator that is connected with the reefer kapillary, the refrigerating chamber kapillary that is connected with the outlet C of two-position three way magnetic valve, refrigeration system and electric control circuit that the freezer evaporator that is connected with the refrigerating chamber kapillary is formed, refrigerator evaporator is connected with compressor with freezer evaporator series connection back, it is characterized in that said refrigeration system and electric control circuit are installed on the experiment table, the outlet of condenser also is connected with refrigerant valve and receiver, also connecting dirty blocking valve between condenser and the device for drying and filtering, also connecting ice block valve between reefer kapillary and the refrigerator evaporator, also connecting whole block valve between the outlet B of two-position three way magnetic valve and the reefer kapillary, also be connected between the outlet B of the outlet of condenser and two-position three way magnetic valve with kapillary and blocking valve, also connecting the valve core draught excluder between the import A of two-position three way magnetic valve and the outlet C, above-mentioned refrigerant valve, dirty blocking valve, ice block valve, whole block valve, blocking valve and valve core draught excluder are solenoid valve, its control coil is connected on the corresponding output end of infrared radiation receiving circuit, the control signal of infrared radiation receiving circuit receiving infrared-ray radiating circuit.
2. be provided with and the principle demonstration experiment table according to the described refrigerator fault of claim 1, it is characterized in that said infrared transmitter is made up of oscillator, the power amplifier that is connected with oscillator, the infrared head that is connected with power amplifier and power supply and switch, prime amplifier that infrared radiation receiving circuit is connected with infrared receiving terminal by infrared receiving terminal and power supply and switch are constituted, and the output of prime amplifier is connected with the coil of a plurality of solenoid valves and relay respectively.
3. be provided with and the principle demonstration experiment table according to claim 1 or 2 described refrigerator faults; temperature controller inefficacy normally opened contact in the two ends parallel connection that it is characterized in that the refrigerating chamber temperature controller in the said electric control circuit; the two ends parallel connection of PTC starter PTC and is burnt the short circuit normally opened contact; the PTC that connecting between PTC starter and the power supply normally closed contact that opens circuit that lost efficacy; compressor and the overload compressor electric motor winding normally closed contact that opens circuit of connecting between the overheat protector; the fan of connecting between fan and the button thereof damages normally closed contact; the electromagnetic valve coil of connecting between two-position three way magnetic valve and the power supply normally closed contact that opens circuit; the frost removal timer motor inefficacy normally closed contact of connecting between frost removal timer motor and the defrosting heater; the defrost temperature controller inefficacy normally closed contact of connecting between defrost temperature controller and the defrosting heater; the defrost thermal protector inefficacy normally closed contact of connecting between temperature fuse and the power supply; above-mentioned two normally opened contacts and 7 normally closed contacts are respectively the contact of the corresponding relay of infrared radiation receiving circuit, by this corresponding relay control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420052114 CN2720545Y (en) | 2004-07-05 | 2004-07-05 | Refrigerator fault setting and principle demonstration experiment table |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420052114 CN2720545Y (en) | 2004-07-05 | 2004-07-05 | Refrigerator fault setting and principle demonstration experiment table |
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| Publication Number | Publication Date |
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| CN2720545Y true CN2720545Y (en) | 2005-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200420052114 Expired - Fee Related CN2720545Y (en) | 2004-07-05 | 2004-07-05 | Refrigerator fault setting and principle demonstration experiment table |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103761920A (en) * | 2014-02-18 | 2014-04-30 | 郑州牧业工程高等专科学校 | Refrigerating system fault simulation experiment set |
| CN104900127A (en) * | 2014-03-07 | 2015-09-09 | 湖南众航科技有限公司 | Hydraulic and air pressure fault diagnosis and maintenance experiment table |
| CN106782011A (en) * | 2016-12-30 | 2017-05-31 | 武汉华育诺为信息技术有限公司 | A kind of refrigeration system for real training |
-
2004
- 2004-07-05 CN CN 200420052114 patent/CN2720545Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103761920A (en) * | 2014-02-18 | 2014-04-30 | 郑州牧业工程高等专科学校 | Refrigerating system fault simulation experiment set |
| CN103761920B (en) * | 2014-02-18 | 2016-05-18 | 郑州牧业工程高等专科学校 | A kind of breakdown of refrigeration system analogue experiment installation |
| CN104900127A (en) * | 2014-03-07 | 2015-09-09 | 湖南众航科技有限公司 | Hydraulic and air pressure fault diagnosis and maintenance experiment table |
| CN106782011A (en) * | 2016-12-30 | 2017-05-31 | 武汉华育诺为信息技术有限公司 | A kind of refrigeration system for real training |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |