CN102194364A - Teaching training table for alternating-current variable-frequency multi-unit air conditioning unit - Google Patents
Teaching training table for alternating-current variable-frequency multi-unit air conditioning unit Download PDFInfo
- Publication number
- CN102194364A CN102194364A CN2011101411835A CN201110141183A CN102194364A CN 102194364 A CN102194364 A CN 102194364A CN 2011101411835 A CN2011101411835 A CN 2011101411835A CN 201110141183 A CN201110141183 A CN 201110141183A CN 102194364 A CN102194364 A CN 102194364A
- Authority
- CN
- China
- Prior art keywords
- unit
- frequency
- teaching
- training
- frequency conversion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a teaching training table for an alternating-current variable-frequency multi-unit air conditioning unit. The teaching training table consists of an alternating-current variable-frequency multi-unit air conditioning unit and a manipulation training table; the alternating-current variable-frequency multi-unit air conditioning unit comprises a refrigerating system, an electrical control system and an air heat exchange system; the refrigerating system consists of a variable-frequency compressor, a fixed-frequency compressor, a main four-way valve, an auxiliary four-way valve, a condenser, a throttling component and a multi-unit indoor unit; and the electrical control system comprises a sensor, a master control board, a variable-frequency controller and a plurality of electric apparatus executing mechanisms. The teaching training table is characterized in that: a structural drawing for pipelines of the refrigerating system is printed on the front face of the manipulation training table; and a thermo-dynamical parameter instrument and an electric quantity parameter instrument for displaying real-time parameters are arranged on the front face of the manipulation training table. In the teaching training table, design functions of comprehensive teaching training such as learnings of a running mechanism, signal measurement, fault setting and diagnosis, signal acquisition and real-time demonstration, performance tracking research and the like, and experiments and the like are realized through a simulation run mode and an actual run mode.
Description
Technical field
The present invention relates to the teaching aid field, more particularly, relate to a kind of AC frequency conversion combined air conditioners unit teaching and training platform.
Background technology
The AC frequency conversion combined air conditioners can be selected automatically to heat, freeze and dehumidify drive manner according to environment temperature, make the room reach needed temperature at short notice rapidly and under the slow-speed of revolution, low energy consumption state with the fluctuation of the less temperature difference, realized quick, energy-conservation and comfortable temperature control effect.AC frequency conversion combined air conditioners unit is energy-conservation and comfortable because of it to be used widely, but converter technique makes whole electric control system complexity, and the refrigeration piping control system of cooperation frequency conversion capacity adjustment is relative complex also.Along with the increase of service time, the complete machine performance descends and hidden fault rises greatly.
Produce failure cause multiple situation is arranged, complicated as the design of: circuit control panel, overheated, complicated PIPING DESIGN, the frequency-changeable compressor of master control borad constantly raises speed or deceleration etc., because AC frequency conversion combined air conditioners unit electrical system complexity, the analysis of causes that fault produces needs the professional to investigate, and at present, the grasp that the grasp of AC frequency conversion multi-connected air conditioner maintenance technique does not catch up with, most service technician lacks core skills, its hidden fault can't be got rid of, and causes refrigeration/thermal effect variation.Decline also lacks systematic study and enterprise is to performance.In view of the frequency-conversion air-conditioning system complex structure, the skill that service technician is learnt its principle of work and accurate fault judgement has suitable difficulty, and does not also have special teaching aid to solve this difficulty at present.
Disclosed Chinese utility model patent CN200620074785.8 (name is called refrigeration air-conditioner multifunction test platform) on October 24th, 2007, this multifunction refrigeration air conditioner pilot system is by refrigeration system, and air treatment system and switch board are formed.Switch board is by refrigeration system, the air switch of each electricity consumption device of air treatment system, A.C. contactor, control auxiliary reclay, control high precision regulator, actuator, measurement instrument, data acquisition unit, dynamic similation shows low-voltage circuit, formations such as data acquisition and control computer.Can finish as the refrigeration compressor performance test, the handpiece Water Chilling Units performance test, water-water heat exchanger conducts heat, and multiple teaching tests such as resistance performance test are a kind of all-around test stands.But this test platform is primarily aimed at the demand of laboratory examination research aspect and develops, and it is used for the analytical equipment quantitative under the various operating modes and the situation of refrigeration system, and analytical parameters is to the influence of equipment and running situation.And impart knowledge to students and the detection of most common failure and the professor of maintenance knowledge for the principle of work of the multi-joint machine of convertible frequency air-conditioner, then lack intuitive and demo function, and this testing table need increase various regulating and controlling instrument and equipments, data acquisition computer, need to drop into substantial contribution, can not satisfy the professional teaching need of practice.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of teaching and training platform that is used for teaching of AC frequency conversion combined air conditioners unit refrigeration principle and maintenance skills combined training is provided, can realize series training and experimental design functions such as the study of direct viewing type operation mechanism, operational factor monitoring, running status indication, real time demonstration, performance follow-up study, to solve the problem that above-mentioned prior art exists.
The technical solution used in the present invention is: a kind of AC frequency conversion combined air conditioners unit teaching and training platform, by AC frequency conversion combined air conditioners unit with control training station and form, AC frequency conversion combined air conditioners unit comprises refrigeration system, electric-control system and air heat-exchange system, refrigeration system is by frequency-changeable compressor, invariable frequency compressor, main four-way valve, auxiliary four-way valve, condenser, throttle part, multi-joint indoor units is formed, electric-control system comprises sensor, master control borad, frequency-variable controller and a plurality of electrical equipment topworks, air heat exchange system is by indoor high static pressure airduct heat-exchange system, indoor low static pressure airduct heat-exchange system, the pneumatic hose heat-exchange system, outdoor heat exchange system etc., it is characterized in that: be printed with refrigeration system pipeline configuration figure and heat-exchange system synoptic diagram in the described front of controlling training station, the thermal parameter instrument and the electrical parameter instrument that show the real-time parameter value are installed in the front of controlling training station.
Above-mentioned AC frequency conversion combined air conditioners unit teaching and training platform, at the described training station of controlling operation mode changeover switch is set, comprise true operational mode that connects the air-conditioning unit and the simulation run pattern that breaks away from the air-conditioning unit, also be provided with adjustable parameter simulation device on the training station controlling; In true operational mode, the sensor of air-conditioning unit is connected with the master control borad input port; In the simulation run pattern, the parameter simulation device is connected with the master control borad input port, and the output port of master control borad disconnects and being connected of air-conditioning unit electrical equipment topworks.
Above-mentioned AC frequency conversion combined air conditioners unit teaching and training platform is controlled the fault that training station is provided with a plurality of electrical equipment topworks switch is set described, and described fault is provided with switch and is connected in series with corresponding electrical equipment topworks.
Above-mentioned AC frequency conversion combined air conditioners unit teaching and training platform, at the described refrigeration system pipeline configuration figure in training station front and the other electric signal measurement point that is provided with of a plurality of electrical equipment topworkies on the air heat exchange synoptic diagram controlled, described electric signal measurement point is by drawing on the corresponding electrical equipment actuating mechanism circuit on the air-conditioning unit.
Above-mentioned AC frequency conversion combined air conditioners unit teaching and training platform, described electric-control system also comprises anti-lightning strike filter.
Compared with prior art, the present invention has the following advantages:
1) AC frequency conversion combined air conditioners unit teaching and training platform of the present invention principle and the structure and the workflow of having showed refrigeration system and wind system in mode very intuitively, for engineering technical personnel and after sale service personnel provide good integrated learning of multi-evaporator inverter air conditioner machine set technology and training tool, and the follow-up study that can experimentize to the performance of multi-evaporator inverter air conditioner unit.
2) this teaching and training platform also can be realized functions such as online and two kinds of operational mode switchings of emulation, state parameter and electrical quantity demonstration and detection, fault are provided with, the demonstration of teaching and training platform signal accurately, fault setting, signal measurement, operation indication all meet every designing requirement, reached alternating frequency conversion techniques such as the multiclass solenoid valve in refrigeration system, the pipeline control, electronic expansion valve opening real time demonstration, wind system, inside and outside machine connected mode have been carried out the designing requirement of training study, and can research and analyse the complete machine performance data.
3) this teaching and training platform is simple in structure, principle is directly perceived, is specially adapted to the experimental teaching of carrying out at general students of science and technology.
Description of drawings
Fig. 1 is an AC frequency conversion combined air conditioners unit teaching and training platform connection diagram of the present invention;
Fig. 2 is the training station structural representation of controlling shown in Figure 1;
Fig. 3 is the training station refrigeration system pipeline structural representation of controlling shown in Figure 2;
Fig. 4 and automatically controlled training station printing synoptic diagram shown in Figure 1.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As Fig. 1--shown in 4, the main frame 1 of multi-evaporator inverter air conditioner unit teaching and training platform with control training station 2, automatically controlled training station 3 is connected.Frequency-changeable compressor, invariable frequency compressor, main four-way valve, auxiliary four-way valve, condenser, throttle part, multi-joint indoor units are installed in main frame, the sensor of electric-control system and each electrical equipment topworks are installed on the main frame 1, and the master control borad of electric-control system, frequency-variable controller, anti-lightning strike filter and part electrical equipment (electric control elements such as transformer, blower fan electric capacity, relay, A.C. contactor) are installed on the automatically controlled training station 3.Be printed with refrigeration system pipeline configuration process flow diagram and wind system signal Figure 11 in the front of controlling training station 2, and the blowout-back pressure gauge, low pressure gauge etc. of three-phase current table, 220V source current table, three-phase mains voltage table, 220V line voltmeter, indoor environment temperature table, outdoor environment temperature table and condensator outlet thermometer, fixed press exhaust gas thermometer frequently, frequency conversion press exhaust gas thermometer, indoor evaporator outlet, middle part thermometer and demonstration refrigeration system force value are installed in the front of controlling training station.Above-mentioned instrument is installed in the gauge field 12 and all shows the thermal parameter instrument and the electrical parameter instrument of real-time parameter value.
As shown in Figure 2, on the front of controlling training station 2, being provided with the district 13 that places obstacles, true and simulation run mode switch operational zone 15, analog parameter setting area 14.In the mode switch operational zone, be provided with operation mode changeover switch is set, the parameter simulation device that can manually adjust parameter value is set in the analog parameter setting area, in true operational mode, the sensor in the main frame 1 is connected with the master control borad input port on the automatically controlled training station 3; When operation mode changeover switch during at the simulation run mode state, the parameter simulation device is connected with the master control borad input port, and the output port of master control borad disconnects and being connected of the interior electrical equipment topworks of main frame 1.The parameter that simulation is provided with comprises: condensator outlet pipe temperature, outdoor environment temperature, indoor environment temperature, frequency conversion press delivery temperature, fixed press delivery temperature, indoor evaporator outlet temperature, indoor evaporator central tube temperature etc. frequently.Under the analog operation state, control the output port of each topworks's duty display lamp connecting circuit plate of training station, the master control borad Analog signals is also exported control signal and is given each topworks's duty display lamp, is illustrated under the emulation mode duty of topworks by display lamp.In order to strengthen the training of air-conditioning unit malfunction elimination, switch is set controlling the fault that training station 2 is provided with a plurality of electrical equipment topworks, and be provided with the electric signal measurement point 16 of crucial electrical equipment topworks, electric signal measurement point is by drawing on the corresponding electrical equipment actuating mechanism circuit on the air-conditioning unit, and the electric signal measurement point is located at by the illustrated electrical equipment topworks on the refrigeration system pipeline configuration figure.For example, when the fault of opening auxiliary four-way valve ST2 is provided with switch, auxiliary four-way valve ST2 outage, the flow direction of cold-producing medium can not be selected and change, and can not detect the value of electrical signals of auxiliary four-way valve ST2.The student can improve the ability of site disposal problem rapidly by the training that fault is provided with.
As shown in Figure 3, the refrigeration work process of AC frequency conversion combined air conditioners unit refrigeration system of the present invention is as follows: fixed frequency/frequency-changeable compressor exhaust → main four-way valve ST1 → assist four-way valve ST2 (available flow to two condensers) → condenser → retaining valve → exhaust box → electric expansion valve → exhaust box → liquid storage pipe → branch pipe → multi-joint indoor units → EXV3 throttle part → evaporator → main four-way valve ST1 → compressor; When system heated, main four-way valve ST1 changed pipeline flow-direction, makes the high temperature refrigerant that comes out from compressor flow to multi-joint indoor units earlier, passes through throttling again, evaporates, gets back to compressor in outdoor condenser.
As Fig. 4, on the front of automatically controlled training station 3, print off-premises station master control borad 31, indoor set master control borad 32, anti-lightning strike filter 33, the connection wiring diagram of frequency-variable controller 34 electric control elements such as grade, and on corresponding position, above-mentioned electric components is installed, on the right side of billboard oscillograph 36 is set, oscillographic below is provided with topworks status display area 35, in this zone, frequency-changeable compressor is housed, invariable frequency compressor, a plurality of solenoid valves, main four-way valve, the duty display lamp of a plurality of critical components such as auxiliary four-way valve comes into plain view the real-time running state of each parts.
The present invention is directed to the teaching of the refrigeration system principle of AC frequency conversion combined air conditioners unit, route map by drawing system structure pipeline trend, make student's visual understanding refrigeration and heat the cold-producing medium trend of duty, thereby allow the student read by study practice voluntarily and judge, cultivate students'ability for practice, promote technical ability, be familiar with device structure.Teaching and training platform of the present invention can carry out simulation operations, Long-distance Control and truly move two kinds of patterns controlling on the training station, and realize system synthesis study, training and experimental design functions such as signal measurement, Load Regulation real time demonstration, fault are provided with, also can utilize this training station that the principle of work and the electric control principle of multi-evaporator inverter air conditioner unit are carried out deep research, powerful, practical.
Embodiment as the another kind simplification, when only doing refrigeration system teaching use, on the basis of the foregoing description, the training station of controlling that shows refrigerant system configurations directly is connected with main frame, and master control borad, frequency-variable controller, anti-lightning strike filter and the part electrical equipment (electrical equipments such as transformer, blower fan electric capacity, relay, A.C. contactor) of automatically controlled training station is put back in the main frame, thereby reduce the wiring of system, save taking up room of training station, reduce equipment cost.
Claims (5)
1. AC frequency conversion combined air conditioners unit teaching and training platform, by AC frequency conversion combined air conditioners unit with control training station and form, AC frequency conversion combined air conditioners unit comprises refrigeration system, electric-control system and air heat-exchange system, refrigeration system is by frequency-changeable compressor, invariable frequency compressor, main four-way valve, auxiliary four-way valve, condenser, throttle part, multi-joint indoor units is formed, electric-control system comprises sensor, master control borad, frequency-variable controller and a plurality of electrical equipment topworks, air heat exchange system is by indoor high static pressure airduct heat-exchange system, indoor low static pressure airduct heat-exchange system, the pneumatic hose heat-exchange system, outdoor heat exchange system etc., it is characterized in that: be printed with refrigeration system pipeline configuration figure and heat-exchange system synoptic diagram in the described front of controlling training station, the thermal parameter instrument and the electrical parameter instrument that show the real-time parameter value are installed in the front of controlling training station.
2. AC frequency conversion combined air conditioners unit teaching and training platform according to claim 1, it is characterized in that: operation mode changeover switch is set at the described training station of controlling, comprise true operational mode that connects the air-conditioning unit and the simulation run pattern that breaks away from the air-conditioning unit, also be provided with adjustable parameter simulation device on the training station controlling; In true operational mode, the sensor of air-conditioning unit is connected with the master control borad input port; In the simulation run pattern, the parameter simulation device is connected with the master control borad input port, and the output port of master control borad disconnects and being connected of air-conditioning unit electrical equipment topworks.
3. AC frequency conversion combined air conditioners unit teaching and training platform according to claim 1 and 2, it is characterized in that: control the fault that training station is provided with a plurality of electrical equipment topworks switch is set described, described fault is provided with switch and is connected in series with corresponding electrical equipment topworks.
4. AC frequency conversion combined air conditioners unit teaching and training platform according to claim 3, it is characterized in that: at the described refrigeration system pipeline configuration figure in training station front and the other electric signal measurement point that is provided with of a plurality of electrical equipment topworkies on the air heat exchange synoptic diagram controlled, described electric signal measurement point is by drawing on the corresponding electrical equipment actuating mechanism circuit on the air-conditioning unit.
5. AC frequency conversion combined air conditioners unit teaching and training platform according to claim 4, it is characterized in that: described electric-control system also comprises anti-lightning strike filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110141183 CN102194364B (en) | 2011-05-27 | 2011-05-27 | Teaching training table for alternating-current variable-frequency multi-unit air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110141183 CN102194364B (en) | 2011-05-27 | 2011-05-27 | Teaching training table for alternating-current variable-frequency multi-unit air conditioning unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102194364A true CN102194364A (en) | 2011-09-21 |
| CN102194364B CN102194364B (en) | 2013-01-02 |
Family
ID=44602354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110141183 Expired - Fee Related CN102194364B (en) | 2011-05-27 | 2011-05-27 | Teaching training table for alternating-current variable-frequency multi-unit air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102194364B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102184672A (en) * | 2011-05-29 | 2011-09-14 | 顺德职业技术学院 | Digital vortex multi-connected air conditioner refrigerating system teaching training station |
| CN102610156A (en) * | 2012-03-14 | 2012-07-25 | 长春轨道客车股份有限公司 | High-speed motor train unit air-conditioner debugging operation skill training system and control method |
| CN104637385A (en) * | 2013-11-14 | 2015-05-20 | 广东美的制冷设备有限公司 | Air conditioner and function demonstration method thereof |
| CN104655437A (en) * | 2013-11-21 | 2015-05-27 | 珠海格力电器股份有限公司 | Air conditioner simulation equipment |
| CN107204147A (en) * | 2017-06-22 | 2017-09-26 | 星际（重庆）智能装备技术研究院有限公司 | A kind of Fresh air handling units and air-conditioner set demonstration monitoring experiment device based on ARM |
| CN113531773A (en) * | 2021-06-18 | 2021-10-22 | 宁波奥克斯电气股份有限公司 | Multi-connected air conditioner fault detection method and device and multi-connected air conditioner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3934356A (en) * | 1972-10-10 | 1976-01-27 | G. M. Brooks Industries, Inc. | Teaching aid for air conditioning apparatus |
| CN1487247A (en) * | 2003-07-31 | 2004-04-07 | 上海交通大学 | Cooling air conditioner unit fault simulating and diagnosing system |
| CN201207246Y (en) * | 2008-05-16 | 2009-03-11 | 淄博职业学院 | Air-conditioner training device |
| CN201667145U (en) * | 2010-04-02 | 2010-12-08 | 天津圣纳科技有限公司 | Automobile air conditioner system teaching and practical training platform |
| CN202075911U (en) * | 2011-05-27 | 2011-12-14 | 顺德职业技术学院 | Alternating-current variable-frequency multi-connected air conditioning unit teaching training platform |
-
2011
- 2011-05-27 CN CN 201110141183 patent/CN102194364B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3934356A (en) * | 1972-10-10 | 1976-01-27 | G. M. Brooks Industries, Inc. | Teaching aid for air conditioning apparatus |
| CN1487247A (en) * | 2003-07-31 | 2004-04-07 | 上海交通大学 | Cooling air conditioner unit fault simulating and diagnosing system |
| CN201207246Y (en) * | 2008-05-16 | 2009-03-11 | 淄博职业学院 | Air-conditioner training device |
| CN201667145U (en) * | 2010-04-02 | 2010-12-08 | 天津圣纳科技有限公司 | Automobile air conditioner system teaching and practical training platform |
| CN202075911U (en) * | 2011-05-27 | 2011-12-14 | 顺德职业技术学院 | Alternating-current variable-frequency multi-connected air conditioning unit teaching training platform |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102184672A (en) * | 2011-05-29 | 2011-09-14 | 顺德职业技术学院 | Digital vortex multi-connected air conditioner refrigerating system teaching training station |
| CN102184672B (en) * | 2011-05-29 | 2013-04-17 | 顺德职业技术学院 | Digital vortex multi-connected air conditioner refrigerating system teaching training station |
| CN102610156A (en) * | 2012-03-14 | 2012-07-25 | 长春轨道客车股份有限公司 | High-speed motor train unit air-conditioner debugging operation skill training system and control method |
| CN104637385A (en) * | 2013-11-14 | 2015-05-20 | 广东美的制冷设备有限公司 | Air conditioner and function demonstration method thereof |
| CN104655437A (en) * | 2013-11-21 | 2015-05-27 | 珠海格力电器股份有限公司 | Air conditioner simulation equipment |
| CN107204147A (en) * | 2017-06-22 | 2017-09-26 | 星际（重庆）智能装备技术研究院有限公司 | A kind of Fresh air handling units and air-conditioner set demonstration monitoring experiment device based on ARM |
| CN107204147B (en) * | 2017-06-22 | 2019-06-14 | 星际（重庆）智能装备技术研究院有限公司 | A kind of Fresh air handling units and air-conditioner set demonstration monitoring experiment device based on ARM |
| CN113531773A (en) * | 2021-06-18 | 2021-10-22 | 宁波奥克斯电气股份有限公司 | Multi-connected air conditioner fault detection method and device and multi-connected air conditioner |
| CN113531773B (en) * | 2021-06-18 | 2022-11-15 | 宁波奥克斯电气股份有限公司 | Multi-connected air conditioner fault detection method and device and multi-connected air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102194364B (en) | 2013-01-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102194364B (en) | Teaching training table for alternating-current variable-frequency multi-unit air conditioning unit | |
| CN102692066B (en) | Fault diagnosis control system for variable-frequency air conditioner and control method of fault diagnosis control system | |
| CN100485351C (en) | Multifunction refrigeration air conditioner test platform | |
| CN103472822B (en) | A kind of simulation testing device of central air conditioner automatic control system and method for testing | |
| CN102184672B (en) | Digital vortex multi-connected air conditioner refrigerating system teaching training station | |
| CN201104300Y (en) | Central air-conditioning teaching experiment practice training device | |
| CN202075911U (en) | Alternating-current variable-frequency multi-connected air conditioning unit teaching training platform | |
| CN200965491Y (en) | Refrigeration air conditioning multi-function test platform | |
| CN201215699Y (en) | Analogue multifunctional central air-conditioner experiment device for teaching | |
| CN201207246Y (en) | Air-conditioner training device | |
| CN202275548U (en) | Automobile air conditioner training platform used for teaching | |
| CN103473979B (en) | Air conditioner comprehensive performance test practice teaching platform | |
| CN203490893U (en) | Refrigeration training device | |
| CN202075912U (en) | Instructional training platform for refrigerating system of digital vortex multi-gang air conditioner | |
| CN102354469B (en) | Training platform for automobile manual air conditioner teaching | |
| CN1330973C (en) | Experimental installation for failure diagnosis of air conditioner control circuit | |
| CN203503231U (en) | Teaching and practical training platform for air conditioner comprehensive performance test | |
| CN202102632U (en) | Digital intelligent vortex multi-connection air conditioner integrated control system teaching apparatus | |
| CN211294463U (en) | Air conditioner refrigerating system experiment operation platform for teaching | |
| CN203587368U (en) | Air conditioner simulation equipment | |
| CN202306943U (en) | Teaching and practical training table for automatic air conditioning electronic network intelligent control system of automobile | |
| CN102222443B (en) | Educational instrument for refrigerating system of heat pump hot water machine | |
| CN104655437A (en) | Air conditioner simulation equipment | |
| CN202454161U (en) | Constant-temperature and constant-humidity air conditioner simulating experimental device for teaching | |
| CN208636729U (en) | A kind of air conditioning mode analog regulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20170527 |