CN203444252U - Online self-diagnosis system for heat pump water heater - Google Patents

Online self-diagnosis system for heat pump water heater Download PDF

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Publication number
CN203444252U
CN203444252U CN201320510824.4U CN201320510824U CN203444252U CN 203444252 U CN203444252 U CN 203444252U CN 201320510824 U CN201320510824 U CN 201320510824U CN 203444252 U CN203444252 U CN 203444252U
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heat pump
water
detection module
pump water
heating machine
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王玉军
秦黄辉
刘军
王颖
季忠海
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Jiangsu Tianshu Electric Appliance Co Ltd
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Jiangsu Tianshu Electric Appliance Co Ltd
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Abstract

The utility model discloses an online self-diagnosis system for a heat pump water heater, relating to a quality detection and control apparatus for a fluid heater using a heat pump. The online self-diagnosis system comprises a self-diagnosis control device, a high-pressure-side pressure detection module, a low-pressure-side pressure detection module, a power supply energy detection module, a water-volume detection and adjustment module and a database management system. The self-diagnosis control device includes a data analysis unit, a quality inspection control terminal, an environment temperature detection module and a heat pump water heater interface unit. The quality inspection control terminal and the environment temperature detection module are connected to the data analysis unit. The data analysis unit is connected to the database management system. According to the utility model, the data analysis unit gets variable working condition operation actual-measurement data by the heat pump water heater controller, and compares the data with variable working condition operation basic data in a variable working condition operation database of the heat pump water heater, so that the automatic judgment on the qualification of the product is carried out instead of artificial judgment, achieving high accuracy of the judgment. Thus, the quality of the heat pump water heater is ensured, and the cost of the quality inspection of the product is greatly reduced.

Description

The online self-diagnosable system of a kind of heat pump water-heating machine
Technical field
The utility model relates to a kind of quality testing control device that utilizes the fluid heater of heat pump, relates in particular to the online self-diagnosable system of a kind of heat pump water-heating machine for heat pump water-heating machine and control method thereof.
Background technology
Because heat pump water-heating machine is because have the plurality of advantages such as energy-saving and environmental protection, safety, country and social approval have been obtained, produce market has a extensive future, traditional water heating equipment has also been produced to revolutionary alternative trend, and domestic big and small water heater and air-conditioning equipment enterprise join in this field one after another.But, because some medium and small sized enterprises do not have the ability of necessary research and development, production and quality inspection, after the product that this type of enterprise produces puts goods on the market, cause unstable product quality, energy-saving effect is poor to consumer, causes severe consequence, and whole heat pump water-heating machine market development is brought to very large negative effect.In addition some accessory manufacturer quality control levels of heat pump water-heating machine are also good lures unevenly, and the accessory bad enterprise of quality control of stocking up, is also difficult to guarantee heat pump water-heating machine overall mass.Owing to lacking the online self-diagnosable system of necessary heat pump water-heating machine, workman or the quality inspection personnel of being responsible for factory inspection lack necessary technical equipment support, often do not possess the condition that judges that this product whether can safe and reliable operation under variable working condition, factory inspection usually becomes a mere formality.Therefore, how improving the heat pump water-heating machine product quality of dispatching from the factory is the huge problem that present heat pump water-heating machine industry is faced.
Chinese invention patent " a kind of air-condition heat exchanger detection system " (Chinese invention patent ZL200910192560.0, Granted publication CN101692020B) a kind of air-condition heat exchanger detection system is disclosed, comprise low pressure recycle tank, liquid-feeding pump and tested heat interchanger, described low pressure recycle tank is connected with output terminal with the input end of tested heat interchanger respectively with indoor efferent duct by indoor input pipe, liquid-feeding pump is between low pressure recycle tank and indoor input pipe, low pressure recycle tank is connected with air-conditioner outdoor unit with muffler by outdoor efferent duct, it is characterized in that being provided with in low pressure recycle tank and outdoor efferent duct junction the ball-cock assembly of efferent duct refrigerant operational throughput outside pulpit, and ball-cock assembly is in low pressure recycle tank, this utility model detection system is used in conjunction with enthalpy difference or thermal equilibrium laboratory, can to various heat exchange device heat exchange property, contrast fast.The heat interchanger heat exchange property that this utility model is mainly used in heat pump detects, and can not solve the technical matters of the online quality inspection of complete machine of heat pump water-heating machine.
Chinese invention patent application " air-cooled heat pump test macro " (Chinese invention patent application numbers 201310096998.5, publication number CN103175706A) disclose a kind of air-cooled heat pump test macro, in the inside of tested unit environmental chamber, air-treatment case has been housed and there is thermal equilibrium water tank outside.By the cold and hot amount between surface cooler, thermal equilibrium water tank in tested unit, external source Cooling and Heat Source, air-treatment case, distribute and balance, realize the requirement that different warm areas supply water.In test process, the Temperature and Humidity Control of whole environmental system does not need the input of extra thermal source, and the chilled water flow that only enters test cabinet air-treatment case by adjusting can be realized.For large-scale tested Air-Cooled Heat Pump Unit, can realize inlet air temperature of condenser subregion independently controls, in outdoor temperature lower season, only by control, pass in and out the entering of test cabinet, exhaust air rate, can realize tested unit and test required operating mode, save 50% unit test energy consumption.This system both can be used for research and development of products test, again can be for the tested unit performance test of air-cooled heat pump production line.But, because this system is to utilize environmental chamber to realize the performance test of tested source pump, can not solve equally the technical matters of heat pump water-heating machine On-line Product quality inspection.
Utility model content
The purpose of this utility model is to provide a kind of heat pump water-heating machine online self-diagnosable system, utilize heat-pump hot-water machine controller to obtain variable parameter operation measured data, by with database in variable parameter operation basic data contrast, realize the quality testing of heat pump water-heating machine complete machine automatic online, solve the technical matters of heat pump water-heating machine On-line Product quality inspection.
The utility model solves the problems of the technologies described above adopted technical scheme:
The online self-diagnosable system of a kind of heat pump water-heating machine, for the online product quality of heat-pump hot-water machine production line and fault detect and the judgement of after services of product, described heat pump water-heating machine comprises compressor, water-cooled condenser, evaporator and is connected to the water tank of water-cooled condenser, and for controlling the heat-pump hot-water machine controller of unit operation, it is characterized in that:
The online self-diagnosable system of described heat pump water-heating machine comprises self diagnosis control device, high side pressure detection module, and low-pressure lateral pressure detection module, power supply electric energy detection module, the water yield detects adjustment module and data base management system (DBMS);
Described high side pressure detection module is connected on the pressure duct of compressor, described low-pressure lateral pressure detection module is connected on the low pressure line of compressor, described power supply electric energy detection module is connected to the power import of heat pump water-heating machine, and the described water yield detects the cold water inlet that adjustment module is connected to heat pump water-heating machine;
Described self diagnosis control device comprises data analysis unit, quality inspection control terminal, environment temperature detection module and heat pump water-heating machine interface unit;
Described quality inspection control terminal and environment temperature detection module are connected to data analysis unit; Data analysis unit is connected to data base management system (DBMS), by data base management system (DBMS), accesses heat pump water-heating machine variable parameter operation database;
Described heat-pump hot-water machine controller is provided with RS485 interface module; Described data analysis unit, by heat pump water-heating machine interface unit, is set up both-way communication with the RS485 interface module of described heat-pump hot-water machine controller and is connected;
Described high side pressure detection module, low-pressure lateral pressure detection module, power supply electric energy detection module and the water yield detect adjustment module, by heat pump water-heating machine interface unit, are connected to described data analysis unit.
A kind of preferably technical scheme of the online self-diagnosable system of heat pump water-heating machine of the present utility model, it is characterized in that described self diagnosis control device is provided with Network Interface Module, described self diagnosis control device is connected to the data base management system (DBMS) that is positioned at Local or Remote by described Network Interface Module.
A kind of better technical scheme of the online self-diagnosable system of heat pump water-heating machine of the present utility model, it is characterized in that described high side pressure detection module, low-pressure lateral pressure detection module, it is the functional module of heat-pump hot-water machine controller that power supply electric energy detection module and/or the water yield detect adjustment module, described data analysis unit is by the RS485 interface module being connected with heat pump water-heating machine interface unit, be connected to the functional module that heat-pump hot-water machine controller is corresponding, obtain corresponding every variable parameter operation measured data.
The beneficial effects of the utility model are:
1, the online self-diagnosable system of heat pump water-heating machine of the present utility model and control method thereof, by setting up heat pump water-heating machine variable parameter operation database, for the online autodiagnosis technology of heat pump water-heating machine provides test basis, for reliable basis has been established in heat pump water-heating machine quality inspection robotization; Whether qualified by computer automatic diagnosis product, replace artificial judgment, it is more accurate to judge, can guarantee the quality of finished product, and intelligent degree is higher.
2, the online self-diagnosable system of heat pump water-heating machine of the present utility model and control method thereof, the measured data of utilizing the functional module of heat-pump hot-water machine controller self to obtain, the test environment equipment and the detecting instrument that for quality inspection system, configure have specially been omitted, omitted the connection between quality inspection equipment and tested heat pump water-heating machine, both solved the technical matters of the online quality inspection of complete machine of heat pump water-heating machine, heat pump water-heating machine overall mass can be guaranteed, the cost of product quality can be greatly reduced again.
3, the online self-diagnosable system of heat pump water-heating machine of the present utility model and control method thereof, can be applied to after services of product, personnel or dealer judge that product, whether in normal duty, finds out failure cause and trouble location to the unit energy that breaks down simultaneously soon after sale can to assist company.
Accompanying drawing explanation
Fig. 1 is the self diagnosis control device schematic diagram of the online self-diagnosable system of heat pump water-heating machine of the present utility model;
Fig. 2 is the online self-diagnosable system configuration schematic diagram of heat pump water-heating machine of the present utility model;
Fig. 3 is the control flow chart of the online self-diagnosable system of heat pump water-heating machine;
Fig. 4 is the base data table structural representation of heat pump water-heating machine variable parameter operation database.
The label of each parts in above figure: 100-heat pump water-heating machine, 110-compressor, 120-water-cooled condenser, 130-flow controller, 140-evaporator, 150-gas-liquid separator, 160-water tank, 170-hot water supercharge pump, 180-ebullator, 190-heat-pump hot-water machine controller, 200-self diagnosis control device, 211-data analysis unit, 212-quality inspection control terminal, 213-environment temperature detection module, 220-heat pump water-heating machine interface unit, 221-RS485 interface module, 222-high side pressure detection module, 223-low-pressure lateral pressure detection module, 224-power supply electric energy detection module, the 225-water yield detects adjustment module, 230-Network Interface Module, 300-data base management system (DBMS).
Embodiment
In order to understand better technique scheme of the present utility model, below in conjunction with drawings and Examples, describe in detail further.
The online self-diagnosable system of heat pump water-heating machine of the present utility model can be used for the online product quality of heat-pump hot-water machine production line, also can be used for fault detect and the judgement of after services of product, according to the embodiment shown in Fig. 2, heat pump water-heating machine 100 comprises the heat pump that compressor 110, water-cooled condenser 120, flow controller 130, evaporator 140 and gas-liquid separator 150 connect to form, the water heating circuit that water-cooled condenser 120 and water tank 160, hot water supercharge pump 170 and ebullator 180 connect to form, and for controlling the heat-pump hot-water machine controller 190 of unit operation.
The online self-diagnosable system of heat pump water-heating machine of the present utility model comprises self diagnosis control device 200, high side pressure detection module 222, low-pressure lateral pressure detection module 223, power supply electric energy detection module 224, the water yield detects adjustment module 225 and data base management system (DBMS) 300;
High side pressure detection module 222 is connected on the pressure duct of compressor 110, low-pressure lateral pressure detection module 223 is connected on the low pressure line of compressor 110, power supply electric energy detection module 224 is connected to the power import of heat pump water-heating machine 100, and the water yield detects the cold water inlet that adjustment module 250 is connected to heat pump water-heating machine 100.
An embodiment of the self diagnosis control device 200 of the online self-diagnosable system of heat pump water-heating machine of the present utility model as shown in Figure 1, comprise data analysis unit 211, quality inspection control terminal 212, environment temperature detection module 213, heat pump water-heating machine interface unit 220, and Network Interface Module 230; Data analysis unit 211 and quality inspection control terminal 212 can adopt industrial control computer, also can adopt portable computer or panel computer, especially for after sale service personnel and dealer, the self diagnosis control device 200 that adopts portable computer or panel computer to set up, be more convenient for after sale personnel or dealer detects at the scene and judges that whether product is in normal duty, and to breaking down, unit energy is found out failure cause and trouble location in time.
Described quality inspection control terminal 212 and environment temperature detection module 213 are connected to data analysis unit 211; Data analysis unit 211 is connected to data base management system (DBMS) 300 by Network Interface Module 230, by data base management system (DBMS) 300 access heat pump water-heating machine variable parameter operation databases.In this embodiment, data base management system (DBMS) 300 can be the data base management system (DBMS) that is placed in production line scene, can be also the remote database management system that is positioned at enterprise headquarters.Especially when self-diagnosable system of the present utility model is used for the fault detect of heat pump water-heating machine after services of product and judges, the technical scheme that access is positioned at the remote database management system of enterprise headquarters is better selection.
Described heat-pump hot-water machine controller 190 is provided with RS485 interface module 221; Data analysis unit 211, by heat pump water-heating machine interface unit 220, is set up both-way communication with the RS485 interface module 221 of heat-pump hot-water machine controller 190 and is connected; Utilize the control sensor of heat-pump hot-water machine controller 190 self, obtain the variable parameter operation measured datas such as inflow temperature, leaving water temperature, delivery temperature, suction temperature and fin temperature of heat pump water-heating machine 100.
High side pressure detection module 222, low-pressure lateral pressure detection module 223, power supply electric energy detection module 224 and the water yield detect adjustment module 225, by heat pump water-heating machine interface unit 220, are connected to data analysis unit 211; Obtain the variable parameter operation measured datas such as environment dry-bulb temperature, environment wet-bulb temperature, discharge, high side pressure, low-pressure lateral pressure, supply voltage, electric current and power.For some high-grade heat pump water-heating machines 100, heat-pump hot-water machine controller 190 itself has just been configured high side pressure detection module 222, low-pressure lateral pressure detection module 223, power supply electric energy detection module 224 and/or the water yield detect the functional modules such as adjustment module 225; In this case, the data analysis unit 211 of the online self-diagnosable system of heat pump water-heating machine of the present utility model, can be via the RS485 interface module 221 being connected with heat pump water-heating machine interface unit 220, directly, by the functional module of heat-pump hot-water machine controller 190 correspondences, obtain the variable parameter operation measured datas such as corresponding discharge, high side pressure, low-pressure lateral pressure, supply voltage, electric current and power.
Control method for the online self-diagnosable system of heat pump water-heating machine of the present utility model, comprises the following steps:
S1: the operating condition of heat pump water-heating machine is carried out to analysis and calculation, by enthalpy difference experimental verification, determine variable parameter operation basic data and the quality Rule of judgment of heat pump water-heating machine, build heat pump water-heating machine variable parameter operation database;
S2: self diagnosis control device is connected to heat-pump hot-water machine controller, obtains the variable parameter operation measured data of heat pump water-heating machine by heat-pump hot-water machine controller; Described variable parameter operation measured data is mainly the measured data that the functional module of heat-pump hot-water machine controller self is obtained, and does not need configuration to be in addition specifically designed to test environment and the detecting instrument that quality inspection detects.For example, utilize the control sensor of heat-pump hot-water machine controller 190 self, obtain the variable parameter operation measured datas such as inflow temperature, leaving water temperature, delivery temperature, suction temperature and fin temperature of heat pump water-heating machine 100.
S3: the variable parameter operation basic data in variable parameter operation measured data and variable parameter operation database is compared, judge that according to quality Rule of judgment whether heat pump water-heating machine quality is qualified.
An embodiment of the control method of the online self-diagnosable system of heat pump water-heating machine of the present utility model as shown in Figure 3, comprises the following steps:
S100: the variable parameter operation state to heat pump water-heating machine carries out analysis and calculation, by enthalpy difference experimental verification, obtains heat pump water-heating machine variable parameter operation basic data, builds heat pump water-heating machine variable parameter operation database;
S200: by the model of the tested heat pump water-heating machine of quality inspection control terminal 212 input, scanning product bar code reads in bar code information;
S210: obtain the running environment data of the online self-diagnosable system of heat pump water-heating machine, described running environment data comprise dry-bulb temperature and the wet-bulb temperature of tested heat pump water-heating machine running environment;
S220: according to the model of tested heat pump water-heating machine and running environment data, inquiry heat pump water-heating machine variable parameter operation database, transfers variable parameter operation basic data and quality Rule of judgment under the current running environment of tested heat pump water-heating machine;
S230: generate tested heat pump water-heating machine base data table, determine the test item of online self diagnosis;
S240: generate tested unit discharge setting value, be sent to heat-pump hot-water machine controller 190 by heat pump water-heating machine interface unit 220; Heat-pump hot-water machine controller 190 is according to the discharge of the tested heat pump water-heating machine of discharge set point adjustment;
S250: control and start tested heat pump water-heating machine 100 by heat-pump hot-water machine controller 190; Tested heat pump water-heating machine 100 carries out quality inspection diagnosis operation according to setting-up time; The time of quality inspection diagnosis operation is set as 15 to 30 minutes conventionally, and the preferred settings time is 20 minutes.
S260: by heat pump water-heating machine interface unit 220, access heat-pump hot-water machine controller 190, and high side pressure detection module 222, low-pressure lateral pressure detection module 223, power supply electric energy detection module 224 and the water yield detect adjustment module 225, according to the definite online self diagnosis test item of base data table, gather item by item the operation measured data of tested heat pump water-heating machine;
S270: every operation measured data is compared with corresponding variable parameter operation basic data, judge whether to meet quality Rule of judgment;
S280: if a certain operation measured data does not meet quality Rule of judgment, show failure cause and trouble location by quality inspection control terminal 212, reprocess support for tested heat pump water-heating machine provides;
S290: if every operation measured data all meets quality Rule of judgment, judge that tested heat pump water-heating machine is qualified, quality inspection diagnosis end of run;
S300: store the quality inspection result data of tested heat pump water-heating machine into finished product information database.
In the control method of the online self-diagnosable system of heat pump water-heating machine of the present utility model shown in Fig. 3, described variable parameter operation database builds according to following steps:
S110: the heat pump water-heating machine to sizing carries out variable parameter operation state analysis and calculating, obtains the design theory data of variable parameter operation;
S120: to the test manufacture of heat pump water-heating machine sizing small-lot testing model machine, small-lot testing model machine is carried out to the enthalpy difference experiment under changing environment operating mode;
S130: the variable parameter operation experimental data that enthalpy difference experiment is obtained and the design theory data of the variable parameter operation checking that compares;
S140: combination product design parameter and target level of product quality, determine every basic data and the quality Rule of judgment of variable parameter operation;
S150: according to the product type of test prototype, by every basic data of variable parameter operation and quality Rule of judgment grouping and classifying, set up the variable parameter operation model of heat pump water-heating machine sizing new product;
S160: by data base management system (DBMS), add variable parameter operation model to database, build heat pump water-heating machine variable parameter operation database.
According to an embodiment who builds heat pump water-heating machine variable parameter operation database, 5 of the heat pump water-heating machine new product short run of same model test manufacture test prototypes, all send into enthalpy difference laboratory and carry out the detection of changing environment operating mode, carry out small lot batch production consistency checking.By 5 groups of experimental datas and design theory data that 5 model machines are detected, compare, as experimental data and gross data are coincide, judge that the gross data under variable working condition is effective, using the gross data of this type product as the basic data that judges that whether this type product is qualified.Basic data through experimental verification is sorted out, the deviation range of stipulating in the design parameter of combination product and heat pump water-heating machine national standard, determine effective range and the quality Rule of judgment of above-mentioned every basic data, thereby set up the variable parameter operation model of heat pump water-heating machine, by data base management system (DBMS), add database to, build heat pump water-heating machine variable parameter operation database.
Fig. 4 is an embodiment of the basic data list structure of heat pump water-heating machine variable parameter operation database.According to this embodiment, the basic data of described variable parameter operation and operation measured data comprise environment dry-bulb temperature, environment wet-bulb temperature, inflow temperature, leaving water temperature, discharge, delivery temperature, suction temperature and fin temperature, and high side pressure, low-pressure lateral pressure, supply voltage, electric current and power.In this embodiment, described quality Rule of judgment comprises the following:
1. high side pressure franchise: ± 5%;
2. low-pressure lateral pressure franchise: ± 5%;
3. Inlet and outlet water temperature difference franchise: ± 0.25 ℃;
4. fin temperature franchise: ± 3 ℃, and suction temperature >=environment temperature-8 ℃;
5. delivery temperature franchise: ± 10%, and delivery temperature >=water tank temperature+15 ℃;
6. suction temperature franchise: ± 10%, and suction temperature >=environment temperature-5 ℃;
7. power franchise: ± 10%;
8. electric current franchise: ± 10%, supply voltage is 220V/50Hz.
Those of ordinary skill in the art will be appreciated that; above embodiment is only for the technical solution of the utility model is described; and be not used as restriction of the present utility model; any variation of the above embodiment being done based on connotation of the present utility model, modification, all will drop in the protection domain of claim of the present utility model.

Claims (3)

1. the online self-diagnosable system of heat pump water-heating machine, for the online product quality of heat-pump hot-water machine production line and fault detect and the judgement of after services of product, described heat pump water-heating machine comprises compressor, water-cooled condenser, evaporator and is connected to the water tank of water-cooled condenser, and for controlling the heat-pump hot-water machine controller of unit operation, it is characterized in that:
The online self-diagnosable system of described heat pump water-heating machine comprises self diagnosis control device, high side pressure detection module, and low-pressure lateral pressure detection module, power supply electric energy detection module, the water yield detects adjustment module and data base management system (DBMS);
Described high side pressure detection module is connected on the pressure duct of compressor, described low-pressure lateral pressure detection module is connected on the low pressure line of compressor, described power supply electric energy detection module is connected to the power import of heat pump water-heating machine, and the described water yield detects the cold water inlet that adjustment module is connected to heat pump water-heating machine;
Described self diagnosis control device comprises data analysis unit, quality inspection control terminal, environment temperature detection module and heat pump water-heating machine interface unit;
Described quality inspection control terminal and environment temperature detection module are connected to data analysis unit; Data analysis unit is connected to data base management system (DBMS), by data base management system (DBMS), accesses heat pump water-heating machine variable parameter operation database;
Described heat-pump hot-water machine controller is provided with RS485 interface module; Described data analysis unit, by heat pump water-heating machine interface unit, is set up both-way communication with the RS485 interface module of described heat-pump hot-water machine controller and is connected;
Described high side pressure detection module, low-pressure lateral pressure detection module, power supply electric energy detection module and the water yield detect adjustment module, by heat pump water-heating machine interface unit, are connected to described data analysis unit.
2. the online self-diagnosable system of heat pump water-heating machine according to claim 1, it is characterized in that described self diagnosis control device is provided with Network Interface Module, described self diagnosis control device is connected to the data base management system (DBMS) that is positioned at Local or Remote by described Network Interface Module.
3. the online self-diagnosable system of heat pump water-heating machine according to claim 1, it is characterized in that described high side pressure detection module, low-pressure lateral pressure detection module, it is the functional module of heat-pump hot-water machine controller that power supply electric energy detection module and/or the water yield detect adjustment module, described data analysis unit is by the RS485 interface module being connected with heat pump water-heating machine interface unit, be connected to the functional module that heat-pump hot-water machine controller is corresponding, obtain corresponding every variable parameter operation measured data.
CN201320510824.4U 2013-08-20 2013-08-20 Online self-diagnosis system for heat pump water heater Expired - Lifetime CN203444252U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103471866A (en) * 2013-08-20 2013-12-25 江苏天舒电器有限公司 Online self-diagnosis system for heat-pump water heaters and control method thereof
WO2015024402A1 (en) * 2013-08-20 2015-02-26 江苏天舒电器有限公司 On-line self-diagnosis system of heat pump water heater, and control method and device therefor
CN104913944A (en) * 2015-06-01 2015-09-16 遵义市立新机械有限责任公司 Hammer type breaker intelligent detection system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103471866A (en) * 2013-08-20 2013-12-25 江苏天舒电器有限公司 Online self-diagnosis system for heat-pump water heaters and control method thereof
WO2015024402A1 (en) * 2013-08-20 2015-02-26 江苏天舒电器有限公司 On-line self-diagnosis system of heat pump water heater, and control method and device therefor
CN103471866B (en) * 2013-08-20 2015-11-11 江苏天舒电器有限公司 A kind of online self-diagnosable system of heat pump water-heating machine and control method thereof
CN104913944A (en) * 2015-06-01 2015-09-16 遵义市立新机械有限责任公司 Hammer type breaker intelligent detection system

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