CN201828289U - Operating parameter monitor for ground source heat pump system - Google Patents
Operating parameter monitor for ground source heat pump system Download PDFInfo
- Publication number
- CN201828289U CN201828289U CN2010205852185U CN201020585218U CN201828289U CN 201828289 U CN201828289 U CN 201828289U CN 2010205852185 U CN2010205852185 U CN 2010205852185U CN 201020585218 U CN201020585218 U CN 201020585218U CN 201828289 U CN201828289 U CN 201828289U
- Authority
- CN
- China
- Prior art keywords
- monitor
- earth
- pump system
- parameter monitor
- sensor
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model relates to an operating parameter monitor for a ground source heat pump system, which comprises a sensor system including a flow sensor, a pressure sensor, a temperature sensor and a split core type current transformer, an electric parameter monitor including a multifunctional electricity meter and a terminal industrial personal computer in communication connection with the split core type current transformer, and a heating power parameter monitor including a polling device in communication connection with the flow sensor, the pressure sensor and the temperature sensor. The heating power parameter monitor is communicated with the electric parameter monitor and supplied with power by the electric parameter monitor. The operating parameter monitor is convenient to carry, simple to operate and can realize real-time and synchronous monitoring on all significant parameters of the ground source heat pump system under the condition of not damaging the original pipeline system and electrical system.
Description
Technical field
The utility model relates to a kind of parameter monitoring instrument, particularly relates to flow, temperature, the pressure of a kind of earth-source hot-pump system operation, the on-line monitoring instrument of parameters of electric power.
Background technology
Earth source heat pump be a kind of utilize underground geothermal using resource (also claim ground can, comprise underground water, soil or surface water etc.) but not only heat supply but also the high-efficiency energy-saving air conditioning system that can freeze.According to the form of Cooling and Heat Source can be divided into the underground water earth source heat pump, pipe laying earth source heat pump and surface water earth source heat pump.
Earth source heat pump realizes that by input a spot of high-grade energy (as electric energy) low-temperature heat energy is to the high temperature bit transition.Ground can be distinguished in the winter time as the thermal source of heat pump heating and the low-temperature receiver of summer air-conditioning, promptly in the winter time, the heat in the ground energy " got ", and after the raising temperature, the supply indoor heating; Summer, indoor heat is taken out, be discharged in the ground energy and go.
The earth source heat pump cooling system is made up of ground temperature heat exchanger, source pump and end system three parts.This three part by ground temperature circulation and terminal changes in temperature circulate two independently closed cycle organically couple together.
The main operational factor of earth-source hot-pump system comprises flow, temperature, pressure, electric power etc., and these parameters are estimated most important for problem investigation, operation adjustment, system's improvement and the system synthesis efficiency of earth-source hot-pump system.Increasing along with the earth source heat pump engineering project, the problem that comes out is also more and more, no matter is in the earth source heat pump design, on still the operation of earth-source hot-pump system moves, does not all have real realization science, reasonably design and use.And the problem that the comprehensive efficiency appraisal of earth-source hot-pump system can the discovery system exists comprises design and misoperation, thereby can improve system or method of operating.Increased actual items to existing theoretical checking and check link by appraisal on the other hand, helped the further perfect of existing theory, thereby really realize the characteristics of earth source heat pump energy-saving and environmental protection.
Ground source heat pump technology scale application and applied links existing problems; make earth-source hot-pump system operation scheme optimization, system's improvement and comprehensive efficiency evaluation have very large market; and the comprehensive earth-source hot-pump system supplemental characteristic of above-mentioned these needs of work, earth-source hot-pump system operational factor monitor will have vast market.
Yet most earth source heat pump projects are not reserved the monitoring interface of each parameter in installation process, and this makes the parameter monitoring in system's operational process become difficult.The inventor develops the utility model that has practical value based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge---earth-source hot-pump system operational factor monitor.This monitor can be under the situation of not destroying original piping system and electrical system, realize the earth-source hot-pump system operational factor comprehensively, in real time, synchronously, monitoring exactly.Can propose prioritization scheme to the operation of earth-source hot-pump system, system is proposed improvement project and system is carried out comprehensive efficiency evaluation by analysis parameter; because earth source heat pump is scale application and problem increase gradually gradually, earth-source hot-pump system operational factor monitor has to be used and market outlook preferably.
Summary of the invention
Fundamental purpose of the present utility model is, overcome the also earth-source hot-pump system of spare interface not of installation and operation parameter monitoring equipment not in early stage, can't carry out comprehensive operational factor problems of monitoring, a kind of earth-source hot-pump system operational factor monitor of new structure is provided, technical matters to be solved is to make it can be under the situation of not destroying original piping system and electrical system, realize real-time, the synchronous monitoring of all important parameters of earth-source hot-pump system, be very suitable for practicality.
The purpose of this utility model and solve its technical matters and realize by the following technical solutions.According to a kind of earth-source hot-pump system operational factor monitor that the utility model proposes, comprise the sensing system of non-cpntact measurement, comprise flow sensor, pressure transducer, temperature sensor and split core type current transformer; The thermal parameter monitor is connected with flow sensor, pressure transducer and temperature sensor communication; And the parameters of electric power monitor, be connected with the split core type current transformer communication; Wherein, thermal parameter monitor and the communication of parameters of electric power monitor, the thermal parameter monitor is powered by the parameters of electric power monitor.
The purpose of this utility model and solve its technical matters and also can be applied to the following technical measures to achieve further.
Aforesaid earth-source hot-pump system operational factor monitor, wherein said thermal parameter monitor comprises the logging that is used for the simulating signal that flow sensor, pressure transducer and temperature sensor record is converted into digital signal, and the ultrasonic flow meter of accepting the flow sensor simulating signal that is connected in parallel; Wherein ultrasonic flow meter passes to logging with flow analog signals.
Aforesaid earth-source hot-pump system operational factor monitor, wherein said parameters of electric power monitor comprises four multifunction electric meters that are used for the simulating signal that split core type current transformer records is changed into digital signal, and the industrial computer that is used to store data.
Aforesaid earth source heat pump is the operational factor monitor, and wherein said flow sensor is a ultrasonic sensor.
Aforesaid earth-source hot-pump system operational factor monitor, wherein said pressure transducer is a pressure unit.
Aforesaid earth-source hot-pump system operational factor monitor, wherein said temperature sensor are the Pt1000 temperature sensors that places the temperature bandage.
Aforesaid earth-source hot-pump system operational factor monitor is characterized in that wherein said parameters of electric power monitor also comprises USB interface.
The utility model compared with prior art has tangible advantage and beneficial effect.By technique scheme, the utility model has following advantage and beneficial effect at least:
(1) do not reserve the parameter monitoring in system's operational process under the situation of parameter monitoring interface at earth-source hot-pump system;
(2) monitoring parameter is complete, comprises flow, temperature, pressure and parameters of electric power;
(3) noncontact of the sensor that is connected with the thermal parameter monitor of parameters of electric power monitor and system under test (SUT) monitoring does not destroy original system, accomplishes in real time, synchronous monitoring monitoring when can realize all parameters;
(4) robotization, high precision, all monitorings need not manual intervention after the sensor installation, and full automation, all devices are all selected the high precision imported product for use, complete machine precision height.
(5) the temperature bandage is to utilize canvas, heat-preservation cotton, and the insulation offset plate constitutes, and is used for fixing temperature sensor, and is heat insulation with the external world.
(6) parameters of electric power monitor and thermal parameter monitor can freely be placed, and plug and play is easy to operate.
(7) cable that is connected with sensor and aviation plug are realized the plug and play with thermal parameter monitor and parameters of electric power monitor.
In sum, the utility model earth source heat pump is the operational factor monitor, comprises sensing system, thermal parameter monitor and parameters of electric power monitor, monitors flow, temperature, pressure and parameters of electric power synchronously, in real time.The utility model has obvious improvement technically, and has tangible good effect, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present utility model can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Figure 1A is the floor map of ultrasonic sensor;
Figure 1B is the floor map of pressure unit;
Fig. 1 C is the floor map that is installed on the Pt1000 temperature sensor of temperature bandage;
Fig. 1 D is the floor map of split core type current transformer;
Fig. 2 is the schematic internal view of thermal parameter monitor;
Fig. 3 A is a thermal parameter monitor internal circuit diagram;
Fig. 3 B is a thermal parameter monitor circuit partial enlarged drawing;
Fig. 4 is a thermal parameter monitor rear interface synoptic diagram;
Fig. 5 A is the schematic internal view of parameters of electric power monitor;
Fig. 5 B is a parameters of electric power monitor rear interface synoptic diagram;
Fig. 6 is system's testing process synoptic diagram.
Embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined utility model purpose is taked, below in conjunction with accompanying drawing and preferred embodiment, to according to its embodiment of earth-source hot-pump system operational factor monitor, structure, feature and the effect thereof that the utility model proposes, describe in detail as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present utility model can be known to present in the following detailed description that cooperates with reference to graphic preferred embodiment.Explanation by embodiment, when can being to reach technological means that predetermined purpose takes and effect to get one more deeply and concrete understanding to the utility model, yet appended graphic only provide with reference to the usefulness of explanation, be not to be used for the utility model is limited.
The earth-source hot-pump system operational factor monitor of the utility model preferred embodiment comprises sensing system, thermal parameter monitor 2 and parameters of electric power monitor 3.Be divided into flow monitoring system, temperature monitoring system, pressure monitor system, power monitoring system from the parameter monitoring angle.
Sensing system comprises 2 cover flow sensors, 6 sleeve pressure sensor, 6 sleeving temperature sensors, 3 cover split core type current transformers.
Shown in Figure 1A, flow sensor adopts non-contact testing equipment, selects ultrasonic sensor 11 for use, is equipped with according to the caliber size.The flow that need monitor of source heat pump system is ground source and air-conditioning side house steward numerously, and end item also has domestic hot-water's side house steward.
Shown in Figure 1B, pressure transducer can be a pressure unit 12, because the position of setting pressure table all is equipped with valve, therefore tensimeter can onlinely be dismantled, when monitoring, the direct-reading tensimeter of system is pulled down the setting pressure transmitter, pull down pressure unit after the monitoring task is finished, install the direct-reading tensimeter.
Earth-source hot-pump system operational factor monitor is mounting temperature sensor on tube wall normally, shown in Fig. 1 C, make different temperature bandages according to different calibers, bandage is installed the Pt1000 temperature sensor 13 of some, and make single-coated foam in strap end, be used for bandage is fixed in pipeline.The temperature bandage is to utilize canvas, heat-preservation cotton, and the insulation offset plate constitutes, and is used for fixing temperature sensor, and is heat insulation with the external world.According to caliber series, this monitoring system is made 6 sleeving temperatures altogether and is measured bandage, be applicable to respectively caliber≤DN50, DN50～DN100, DN100～DN150, DN150～DN200, DN200～DN400, 〉=DN400,4 of every cover bandages, every kind of bandage is according to the needs of testing, and the sensor number of placement is respectively 3,2 and 1, according to different calibers and different requirements, select suitable temperature bandage.Every kind of temperature bandage all has the bandage of a demarcation, and other a bandage temperature that embodies can compare with calibrated bandage.Not affected by environment in order to guarantee monitor temperature, need during monitoring outside bandage, to twine heat-insulation layer, make the insulation belt of same quantity according to the quantity of bandage.This mode reduces measuring error on the one hand, promotes platinum resistance and tube wall thermal equilibrium on the other hand, increases reaction velocity.
Split core type current transformer 14 shown in Fig. 1 D, and what primary current was respectively 1500A, 800A and 200A respectively is equipped with a cover, and secondary current is 5A, and every cover need be joined each one of A, B, C.
As shown in Figure 2, thermal parameter monitor 2 interior fittings mainly contain logging 21, ultrasonic flow meter 22,24V power supply 23,4-20MA power supply 24, interface 25, flowmeter battery 26, fan 27.
Shown in Fig. 3 A and Fig. 3 B, thermal parameter monitor internal circuit diagram and amplification circuit diagram, connect with 24V power supply 23 in ultrasonic flow meter 22 and flowmeter battery 26 backs in parallel, then in parallel with fan 27, logging 21,4-20MA power supply 24 is that logging 53-60 paths is transmitted electricity.Ground source and air-conditioning side need monitoring simultaneously, so this thermal parameter monitor is provided with 2 ultrasonic flow meters, are connected in parallel, if there is the domestic hot-water can intert monitoring.
As shown in Figure 4, the thermal parameter monitor is provided with 24 temperature interfaces 251, connect temperature sensor, all be seven core plugs, the 1-48 paths of corresponding logging respectively, wherein the sensor number be 3 joint correspondence be 1-8 interface, the sensor number be 2 joint correspondence be the 9-16 interface, the sensor number be 1 joint correspondence be the 17-24 interface, and the correspondence position of each temperature bandage can be changed mutually.The thermal parameter monitor also is provided with 8 pressure interfaces 252, connects pressure transducer, all is three core sockets, the 53-60 paths of corresponding logging.The thermal parameter monitor is provided with 4 flow interfaces 253, connection traffic sensor, 61 and 62 paths of corresponding logging respectively.Interface adopts cable to be connected with aviation plug with sensor, realizes and thermal parameter monitor plug and play.
Shown in Fig. 5 A, the interior fittings of parameters of electric power monitor 3 mainly contains four S7-330 multifunction electric meters 31, industrial computer 32,24V power supply 33, interface 34, USB interface 35, switch 36.
Shown in Fig. 5 B, each multifunction electric meter 31 is three sensor interfaces 341 of corresponding back all, respectively corresponding three forcipated mutual-inductors, be used for monitoring the parameters of electric power of access, comprise electric current, line voltage, phase voltages etc., the data of its reaction can be embodied on the multifunction electric meter.Interface adopts cable to be connected with aviation plug with sensor, realizes the plug and play with the parameters of electric power monitor.
The utility model earth-source hot-pump system operational factor monitor, ultrasonic flow meter 11 are installed on the evaporator ebullator and the condenser ebullator of earth-source hot-pump system respectively.Pressure unit 12 is installed on evaporator import and export (water side), condenser import and export (water side) respectively.Temperature sensor 13 is installed on evaporator import and export (water side), condenser import and export (water side) and each branch road of ground heat exchanger (main branch road) respectively.Forcipated mutual-inductor 14 is separately positioned on earth source heat pump unit, evaporator ebullator and condenser ebullator.
As shown in Figure 6, ultrasonic flow meter 11, pressure unit 12 and temperature sensor 13 obtain simulating signal, and this simulating signal is sent to logging 21 collections of band communication function and changes into digital signal.Dock by power port 254,342 and two electric power of communication port 255,343 usefulness and communication butted line respectively between thermal parameter monitor 2 and the parameters of electric power monitor 3, come thermal parameter monitor and parameters of electric power monitor are powered, and timely logging collection and the digital signal that changes into are sent on the industrial computer 32 that has tangible display screen.Multifunction electric meter 31 has communication function, and directly the electric power data with monitoring transfers to industrial computer 32.
External power supply can adopt 220V voltage AC power, also can adopt the 380V supply voltage, can use joint, alligator forceps, and connection terminal connects, and power supply is directly introduced the general supply interface 344 in the parameters of electric power detector.
By the USB interface above the parameters of electric power monitor 35, can derive being stored in the observation process of industrial computer 32 monitoring parameter heating power, pressure, flow, electric power, process is very
The time period that input needs when data derive just can derive the data of wanting, so that carry out data analysis.The data storage capacities of industrial computer 32 itself is very strong, can store lot of data, the storage that under an amount of situation of data storage, previous data can be backuped, and data can not lost under situations such as sudden power, so the storage of data is very safe.
The data that obtain in the industrial computer 32 are by further data analysis, can estimate source heat pump system reliability of operation entirely, stability and with the self-regulation ability of load variations.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art, in not breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.
Claims (7)
1. an earth-source hot-pump system operational factor monitor is characterized in that: comprise
The sensing system of non-cpntact measurement comprises flow sensor, pressure transducer, temperature sensor and split core type current transformer;
The thermal parameter monitor is connected with flow sensor, pressure transducer and temperature sensor communication; And
The parameters of electric power monitor is connected with the split core type current transformer communication;
Wherein, the thermal parameter monitor is connected with the communication of parameters of electric power monitor, and the thermal parameter monitor is powered by the parameters of electric power monitor.
2. earth-source hot-pump system operational factor monitor according to claim 1, it is characterized in that wherein said thermal parameter monitor comprises the logging that is used for the simulating signal that flow sensor, pressure transducer and temperature sensor record is converted into digital signal, and the ultrasonic flow meter of accepting the flow sensor simulating signal that is connected in parallel; Wherein ultrasonic flow meter passes to logging with flow analog signals.
3. earth-source hot-pump system operational factor monitor according to claim 1, it is characterized in that wherein said parameters of electric power monitor comprises four multifunction electric meters that are used for the simulating signal that split core type current transformer records is changed into digital signal, and the industrial computer that is used to store data.
4. earth source heat pump according to claim 1 is the operational factor monitor, it is characterized in that wherein said flow sensor is a ultrasonic sensor, adopts cable to be connected with the communication of thermal parameter monitor with aviation plug.
5. earth-source hot-pump system operational factor monitor according to claim 1 is characterized in that wherein said pressure transducer is a pressure unit, adopts cable to be connected with the communication of thermal parameter monitor with aviation plug.
6. earth-source hot-pump system operational factor monitor according to claim 1 is characterized in that wherein said temperature sensor is the Pt1000 temperature sensor that places the temperature bandage, adopts cable to be connected with the communication of thermal parameter monitor with aviation plug.
7. according to claim 1 or 3 described earth-source hot-pump system operational factor monitors, it is characterized in that wherein said parameters of electric power monitor also comprises USB interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205852185U CN201828289U (en) | 2010-10-26 | 2010-10-26 | Operating parameter monitor for ground source heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205852185U CN201828289U (en) | 2010-10-26 | 2010-10-26 | Operating parameter monitor for ground source heat pump system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201828289U true CN201828289U (en) | 2011-05-11 |
Family
ID=43966816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205852185U Expired - Lifetime CN201828289U (en) | 2010-10-26 | 2010-10-26 | Operating parameter monitor for ground source heat pump system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201828289U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735288A (en) * | 2012-07-04 | 2012-10-17 | 江苏捷卡自动化控制设备有限公司 | Mobile water source heat pump system performance testing device |
| CN103278193A (en) * | 2013-05-02 | 2013-09-04 | 河北省建筑科学研究院 | Inspection method and device of coefficient of performance of air conditioning heat pump unit |
| WO2014040310A1 (en) * | 2012-09-12 | 2014-03-20 | 成都光码智能科技有限公司 | Device and method for monitoring operating condition of equipment based on reverse carnot principle |
| CN103941678A (en) * | 2014-03-28 | 2014-07-23 | 中国科学院沈阳应用生态研究所 | Ground source heat pump system monitoring method and device |
| CN105070023A (en) * | 2015-09-02 | 2015-11-18 | 北京科技大学 | Wireless sensor network device integrated with multiple types of sensors and operation method thereof |
| CN107014511A (en) * | 2017-05-15 | 2017-08-04 | 智能（厦门）传感器有限公司 | A kind of heat point source temperature testing method not directly contacted |
| CN109297223A (en) * | 2018-10-31 | 2019-02-01 | 安徽德胜机电工程有限公司 | A kind of earth source heat pump cold side and freezing side automatic pressure monitor changes in temperature switching valve |
-
2010
- 2010-10-26 CN CN2010205852185U patent/CN201828289U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735288A (en) * | 2012-07-04 | 2012-10-17 | 江苏捷卡自动化控制设备有限公司 | Mobile water source heat pump system performance testing device |
| WO2014040310A1 (en) * | 2012-09-12 | 2014-03-20 | 成都光码智能科技有限公司 | Device and method for monitoring operating condition of equipment based on reverse carnot principle |
| CN103278193A (en) * | 2013-05-02 | 2013-09-04 | 河北省建筑科学研究院 | Inspection method and device of coefficient of performance of air conditioning heat pump unit |
| CN103941678A (en) * | 2014-03-28 | 2014-07-23 | 中国科学院沈阳应用生态研究所 | Ground source heat pump system monitoring method and device |
| CN105070023A (en) * | 2015-09-02 | 2015-11-18 | 北京科技大学 | Wireless sensor network device integrated with multiple types of sensors and operation method thereof |
| CN105070023B (en) * | 2015-09-02 | 2019-06-11 | 北京科技大学 | A kind of wireless sensor network device and operation method collecting sensor |
| CN107014511A (en) * | 2017-05-15 | 2017-08-04 | 智能（厦门）传感器有限公司 | A kind of heat point source temperature testing method not directly contacted |
| CN109297223A (en) * | 2018-10-31 | 2019-02-01 | 安徽德胜机电工程有限公司 | A kind of earth source heat pump cold side and freezing side automatic pressure monitor changes in temperature switching valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201828289U (en) | Operating parameter monitor for ground source heat pump system | |
| Magraner et al. | Comparison between design and actual energy performance of a HVAC-ground coupled heat pump system in cooling and heating operation | |
| CN102033079B (en) | Instrument for testing stratum in-situ thermal property of ground source heat pump and heat exchange quantity of buried pipe | |
| CN102967004B (en) | Temperature area method based heat metering allocation device and allocation method | |
| CN205354304U (en) | A communication interface converter for a wide range of strapping table meter | |
| CN109754195B (en) | Annual performance detection method of ground source heat pump system | |
| CN102288638A (en) | Ground source heat pump thermal response testing system based on PLC (Programmable Logic Controller) | |
| CN203396430U (en) | Portable monitoring instrument for ground source heat pump | |
| CN100456030C (en) | Cold and hot box type heat transfer coefficient detector | |
| CN104897721A (en) | Building wall phase-change heat insulation effect testing system and using method thereof | |
| CN204694654U (en) | Combined type ground source heat pump rock soil thermal physical property and buried pipe heat exchange capacity tester | |
| CN204903055U (en) | Big long -range on -line monitoring device of pipe diameter central heating pipeline stress | |
| CN204808042U (en) | Novel temperature controller testboard | |
| CN105424174A (en) | Centralized solar hot water monitoring system | |
| CN202188926U (en) | Thermal equilibrium rate tester for ground source heat pump system | |
| CN203732965U (en) | Remote intelligent control management system for pipe network | |
| CN201222040Y (en) | Thermal response test instrument for heat-transfer performance of rapid reaction embedded heat exchanger | |
| CN207816871U (en) | Ground geo-thermal response test instrument | |
| CN202661278U (en) | Solar water heater energy efficiency detecting system | |
| CN203299154U (en) | Variable-frequency heat pump type rock-soil thermophysical property tester | |
| CN207541008U (en) | Green agriculture room energy-efficient performance detector | |
| CN202305449U (en) | Ground source heat pump response test system based on PLC (Programmable Logic Controller) | |
| CN205593953U (en) | Portable earth source heat pump ground pipe laying branch road heat transfer performance detector | |
| CN206573305U (en) | In-situ tester for heat bearing of branch of vertical buried pipe heat exchanger | |
| CN203799490U (en) | Automatic wireless centralized meter reading system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110511 |