CN101349601A - Simple method and apparatus for measuring heat load - Google Patents
Simple method and apparatus for measuring heat load Download PDFInfo
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- CN101349601A CN101349601A CNA2008101245265A CN200810124526A CN101349601A CN 101349601 A CN101349601 A CN 101349601A CN A2008101245265 A CNA2008101245265 A CN A2008101245265A CN 200810124526 A CN200810124526 A CN 200810124526A CN 101349601 A CN101349601 A CN 101349601A
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Abstract
The invention relate to a simple method and a simple device for measuring heat load, wherein the simple method for measuring heat load can be divided into the processes of checking, measuring and calculating. Real-time measurement to heat load of each air-conditioning indoor unit is led to be possible since the checking process is introduced and an airflow measuring method is simplified. The simple device for measuring heat load combines the processes of measuring; calculating and displaying together, the data and the calculation formula of moist air parameter and the calculation formula of a surface type heat exchanger are stored in the simple device for measuring heat load. Heat load value is automatically calculated and displayed by the simple device for measuring heat load, personal errors of data query and calculation are avoided, and the problem that air conditioners are charged according to usable area in the past is thoroughly solved, and the charge of an air conditioner is led to be more scientific and reasonable.
Description
Affiliated technical field
The present invention relates to a kind of air-conditioning thermal load measuring method and device, refer in particular to the thermal load simple measuring method and the device of indoor apparatus of air conditioner.
Background technology
At present, the thermal load of known measurement indoor apparatus of air conditioner mainly is to measure air quantity by anemoscope, measures the humiture that passes in and out wind with Temperature Humidity Sensor, according to the data and the formula of soft air parameter, by the computing formula of surface-type heat exchanger, can calculate the thermal load of indoor apparatus of air conditioner.Because anemoscope is measured the technical requirement of air quantity than higher, need measure a plurality of unique points, and according to the different different method of testings of situation needs employing, so just can not measure in real time the thermal load of every indoor apparatus of air conditioner, and in air-conditioning use charge, press for thermal load is measured in real time, realize hope by the thermal load charge, a kind of not only simple but also can learn that the thermal load simple measuring method of every indoor apparatus of air conditioner and device propose at this point.
Summary of the invention
In order to overcome the complicacy of measuring air quantity, reduce technical requirement, reach the purpose that the thermal load of every indoor apparatus of air conditioner is measured in real time, the present invention proposes a kind of thermal load simple measuring method and device, this thermal load simple measuring method is utilized the method for measuring air quantity indirectly with device, and combines with check measuring, and makes the measurement of air quantity become simple, making the thermal load of every indoor apparatus of air conditioner measured in real time becomes possibility, thereby realizes the hope by the thermal load charge.
The technical solution adopted for the present invention to solve the technical problems is: at first discuss the principle that air quantity is measured in real time, for fixed indoor apparatus of air conditioner system, velocity flow profile is with the air quantity size variation in its air channel, air quantity one regularly, wind speed profile is also certain, so every wind speed has certain functional relation with air quantity, finds out funtcional relationship therebetween, just can learn its air quantity by the wind speed of measuring any, in like manner leeway and wind speed are too; For fixed indoor apparatus of air conditioner system, rotation speed of fan also has certain functional relation with air quantity, find out funtcional relationship therebetween, also can learn its air quantity by measuring rotation speed of fan, also there is certain functional relation the position of rotation speed of fan and speed regulator, position one timing of speed regulator, rotation speed of fan is also certain, so also can learn its air quantity by the position of measuring speed regulator; We just can be by the position of measuring wind or leeway or rotation speed of fan or speed regulator like this, draws therebetween funtcional relationship according to the wind quantity test method with standard again, just can learn airflow value; Here we call air flow sensor to the sensor of measuring wind, leeway, rotation speed of fan and speed regulator position; The funtcional relationship that draws therebetween because of the wind quantity test method with standard changes very little in the air-conditioner temperature scope, under normal operating position, change also very little, still can think that funtcional relationship therebetween is constant substantially, also can carry out certain correction to it, it is tallied with the actual situation more; The real-time principle of measuring of air quantity that Here it is.After we learn real-time air quantity, will measure the humiture of indoor apparatus of air conditioner turnover wind, thermal loss near the surface-type heat exchanger in the indoor apparatus of air conditioner, can be reduced in the installation site of Temperature Humidity Sensor as far as possible like this, further improves the measuring accuracy of indoor apparatus of air conditioner thermal load; Learn the humiture of indoor apparatus of air conditioner turnover wind, just can calculate the enthalpy of turnover wind,, just can learn that thermic load value just multiply by airflow value for the enthalpy difference of turnover wind by the computing formula of surface-type heat exchanger according to the data and the computing formula of soft air parameter.The dry-bulb temperature that records the indoor apparatus of air conditioner air intake as us is t
G1, the relative humidity of air intake is
Or the wet-bulb temperature of air intake is t
S1, just can obtain its enthalpy according to the wet figure of enthalpy of humid air or computing formula is h
1The dry-bulb temperature that we record the indoor apparatus of air conditioner air-out is t
G2, the relative humidity of air-out is
Or the wet-bulb temperature of air-out is t
S2, just can obtain its enthalpy according to the wet figure of enthalpy of humid air or computing formula is h
2The air quantity that records indoor apparatus of air conditioner is q
mThen the thermal load of indoor apparatus of air conditioner is Q=q
m(h
2-h
1).For fixed indoor apparatus of air conditioner system, the pattern of surface-type heat exchanger and size are also certain, its contact coefficient just has certain functional relation with airflow value, its funtcional relationship can be looked into by the performance parameter of surface-type heat exchanger or in-site measurement obtains, we just can survey a humidity value less like this, utilize the formula ε of surface-type heat exchanger
2=1-(t
G2-t
S2)/(t
G1-t
S1) obtain another humidity value, wherein ε
2The expression contact coefficient.In sum, the thermal load simple measuring method can be divided into check, three processes of measurements and calculations, the check process is used for checking the funtcional relationship between actual air volume and the air flow sensor, can be at the scene obtain, or obtain according to identical, close indoor apparatus of air conditioner system with the wind quantity test method of standard; Measuring process is with air flow sensor and Temperature Humidity Sensor the indoor apparatus of air conditioner system to be measured in real time; Computation process is according to the data of measuring, and in conjunction with the data and the computing formula of soft air parameter, calculates the enthalpy of turnover wind, and the computing formula by surface-type heat exchanger calculates thermic load value.
For realizing that the thermal load simple measuring method can adopt as lower device, this device is made up of temperature and humidity measurement part, air measuring part, importation, calculation control part, display part.The temperature and humidity measurement part is measured the humiture of turnover wind with Temperature Humidity Sensor; The air measuring part is measured airflow value with air flow sensor; The importation is used to import according to actual air volume that obtains with the wind quantity test method or identical, the close indoor apparatus of air conditioner system of standard at the scene and the funtcional relationship between the air flow sensor; The display part is used to show the instant thermic load value and the thermic load value that adds up; The calculation control part is made up of Single Chip Microcomputer (SCM) system, reduced the volume of device greatly, provide material guarantee for detecting in real time, it is the device core, can unify to handle to the data of above-mentioned each device, and there are the data of soft air parameter and the computing formula of computing formula and surface-type heat exchanger therein, automatically calculate and the demonstration thermic load value by the thermal load simple measurement mechanism, so not only can save the time of looking into data and computational data, can also avoid the personal error of data query and calculating, final calculating and the demonstration thermic load value of realizing promptly and accurately.On this device basic, increase output, can realize indoor apparatus of air conditioner carried out multiple control modes such as Temperature and Humidity Control, thermal load control, comfortableness control.
The invention has the beneficial effects as follows, increased the check process, the technical wind quantity test method of high, complicated standard that requires is converted to the air flow sensor measurement that is simple and easy to survey, the thermal load of every indoor apparatus of air conditioner is measured in real time becomes possibility; Each is measured calculating section combines, avoid the personal error of data query and calculating, final calculating and the demonstration thermic load value of realizing promptly and accurately, thoroughly solution uses air-conditioning to press the usable floor area charging problem in the past, make that the air-conditioning charge is more scientific and reasonable, reach many with overcharge, few purpose with few charge; The control system of itself and indoor apparatus of air conditioner is combined, also can realize indoor apparatus of air conditioner is carried out multiple control modes such as Temperature and Humidity Control, thermal load control, comfortableness control, finally reach the purpose of energy savings.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Accompanying drawing 1 is a thermal load simple measuring method sketch of the present invention.
Air velocity transducer in the 1. standard testing methods in the accompanying drawing 1,2. surface-type heat exchanger, 3. blower fan, 4. ventilation duct, 5. air intake humidity sensor, 6. EAT sensor, 7. test air flow sensor, 8. air-out humidity sensor, 9. leaving air temp sensor.
Accompanying drawing 2 is thermal load simple measurement mechanism functional block diagrams of the present invention.
1. temperature and humidity measurement parts in the accompanying drawing 2,2. air measuring part, 3. importation, 4. calculation control part, 5. display part.
Embodiment
Set forth the thermal load simple measuring method by accompanying drawing 1, soft air by surface-type heat exchanger (2), comes out from ventilation duct (4) more at last because the operation of blower fan (3) enters ventilation duct (4).At first measure air quantity by air velocity transducer (1) in the standard testing method, and test value and test compared with the test value of air flow sensor (7), constantly change air quantity, obtain the funtcional relationship of test thus with air flow sensor (7) and air quantity, at this moment just can remove air velocity transducer in the standard testing method (1), and replace with air flow sensor (7) with test, be used for testing air quantity; Just can obtain passing in and out the humiture value of wind by EAT sensor (6), air intake humidity sensor (5), air-out humidity sensor (8), leaving air temp sensor (9),, calculate the enthalpy h of air intake in conjunction with the data and the computing formula of soft air parameter
1, the enthalpy h of air-out
2,, draw thermic load value Q=q by the computing formula of surface-type heat exchanger
m(h
2-h
1).
We can know that the thermal load simple measurement mechanism is made up of temperature and humidity measurement part (1), air measuring part (2), importation (3), calculation control part (4), several parts in display part (5) by accompanying drawing 2, and temperature and humidity measurement part (1) is measured the humiture that passes in and out wind with Temperature Humidity Sensor; Air measuring part (2) is measured airflow value with air flow sensor; Importation (3) is used to import according to actual air volume that obtains with the wind quantity test method or identical, the close indoor apparatus of air conditioner system of standard at the scene and the funtcional relationship between the air flow sensor; Display part (5) is used to show the instant thermic load value and the thermic load value that adds up, calculation control part (4) is as the device core, can unify to handle to the data of above-mentioned each device, and there are the data of soft air parameter and the computing formula of computing formula and surface-type heat exchanger therein, so not only can save the time of looking into data and computational data, can also avoid the personal error of data query and calculating, final calculating and the demonstration thermic load value of realizing promptly and accurately.
Claims (2)
1. thermal load simple measuring method, be divided into check, three processes of measurements and calculations, the check process is used for checking the funtcional relationship between actual air volume and the air flow sensor, can be at the scene obtains with the wind quantity test method of standard, or obtains according to identical, close indoor apparatus of air conditioner system; Measuring process is with air flow sensor and Temperature Humidity Sensor the indoor apparatus of air conditioner system to be measured in real time; Computation process is according to the data of measuring, and in conjunction with the data and the computing formula of soft air parameter, calculates the enthalpy of turnover wind, and the computing formula by surface-type heat exchanger calculates thermic load value.It is characterized in that having increased the check process, simplify the air measuring method.
2. a thermal load simple measurement mechanism is made up of temperature and humidity measurement part, air measuring part, importation, calculation control part, display part.It is characterized in that funtcional relationship between actual air volume and the air flow sensor according to obtaining with the wind quantity test method of standard or identical, close indoor apparatus of air conditioner system at the scene, calculation control has the data of soft air parameter and the computing formula of computing formula and surface-type heat exchanger in partly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101245265A CN101349601A (en) | 2008-08-22 | 2008-08-22 | Simple method and apparatus for measuring heat load |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101245265A CN101349601A (en) | 2008-08-22 | 2008-08-22 | Simple method and apparatus for measuring heat load |
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| Publication Number | Publication Date |
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| CN101349601A true CN101349601A (en) | 2009-01-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279695A (en) * | 2013-07-01 | 2015-01-14 | 阿自倍尔株式会社 | Heat quantity displaying device and method |
| CN107215174A (en) * | 2017-06-27 | 2017-09-29 | 安徽江淮汽车集团股份有限公司 | Detection method for detecting air-conditioning thermic load and refrigerant flow |
| CN109115516A (en) * | 2018-08-02 | 2019-01-01 | 安徽江淮汽车集团股份有限公司 | A kind of vehicle occupant compartment fresh air thermic load measurement method |
| CN109827672A (en) * | 2019-03-19 | 2019-05-31 | 上海理工大学 | A kind of motor temperature variation test device of blower for vehicle air conditioning |
-
2008
- 2008-08-22 CN CNA2008101245265A patent/CN101349601A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279695A (en) * | 2013-07-01 | 2015-01-14 | 阿自倍尔株式会社 | Heat quantity displaying device and method |
| CN107215174A (en) * | 2017-06-27 | 2017-09-29 | 安徽江淮汽车集团股份有限公司 | Detection method for detecting air-conditioning thermic load and refrigerant flow |
| CN107215174B (en) * | 2017-06-27 | 2019-05-21 | 安徽江淮汽车集团股份有限公司 | For detecting the detection method of air-conditioning thermic load and refrigerant flow |
| CN109115516A (en) * | 2018-08-02 | 2019-01-01 | 安徽江淮汽车集团股份有限公司 | A kind of vehicle occupant compartment fresh air thermic load measurement method |
| CN109827672A (en) * | 2019-03-19 | 2019-05-31 | 上海理工大学 | A kind of motor temperature variation test device of blower for vehicle air conditioning |
| CN109827672B (en) * | 2019-03-19 | 2020-05-05 | 上海理工大学 | Motor temperature change testing arrangement of vehicle air conditioner air-blower |
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Open date: 20090121 |