WO2008006293A1

WO2008006293A1 - An approach and device for testing an air-condition

Info

Publication number: WO2008006293A1
Application number: PCT/CN2007/002048
Authority: WO
Inventors: Sheng Luo; Gang Jin; Rong Yang; Tianguang Zhao; Yuzhen Miao; Zhansong Xu; Fei Liu; Tianjing Zhang; Qian Li; Liang Zeng
Original assignee: Gree Electric Appliances Inc. Of Zhuhai
Priority date: 2006-07-03
Filing date: 2007-07-02
Publication date: 2008-01-17
Also published as: CN101101239A; BRPI0713897A2; CN101101239B

Abstract

An approach for testing an air-condition includes: S1, connecting the outdoor unit of the air-condition to be tested to the standard indoor unit, and activating and running the air-condition by the existing fixed testing approach; S2, collecting the temperature and humidity value of the air inlet and outlet of the indoor unit, and collecting the air flow value of the outlet; S3, transmitting the temperature and humidity values, the air flow values to a data processing device; S4, calculating the temperature value, humidity value and the air flow value in real time to predict the refrigerating capacity, the heating capacity and the energy efficiency ratio; S5, comparing the refrigerating capacity, the heating capacity and the energy efficiency ratio with pre-set inspecting standard, judging if the outdoor unit of the air-condition meet the inspecting standard; S6, if the outdoor unit meet the inspecting standard, entering into the next program; or else entering into underline remedy program. A testing device includes a standard indoor unit, an electric cabinet and a data processing device.

Description

Method and device for testing air conditioner

The present invention relates to a technique for testing an air conditioner, and more particularly to a method and apparatus for rapidly testing an air conditioning refrigeration, heating capability, and energy efficiency ratio on a production line. Background technique

The split type air conditioner is divided into an indoor unit and an outdoor unit, and is disposed separately from each other. The split type air conditioner outdoor unit includes a compressor, a condenser, a closed, a refrigerant in the circulation pipe, and a ventilation system. In the production process, the outdoor unit of the air conditioner needs to be turned on and tested to test whether it can normally cool and heat. The usual practice is to connect the lined product inspection room to the test-dedicated standard room unit for on-line inspection. This test method is generally It is through the detection of several simple operating parameters such as pressure and current, and it is judged whether it is qualified or not by comparing the parameters. ^ To ensure the quality of the products, the products will be pumped in accordance with the requirements of the national standard after the offline, but the sampling does not really eliminate all the machines with cold, heat and energy efficiency. At present, the air conditioner industry is highly competitive, and various air conditioner manufacturers are striving to control product quality. The existing air conditioner factory only performs a short-time start-up test during the production process of the air conditioner, and then a small amount of random inspection is performed in the laboratory, which is difficult to ensure the overall quality of the air conditioner. How to quickly and comprehensively detect the refrigeration, heating capacity and energy efficiency ratio of the air conditioners produced is a problem facing the entire air conditioning test industry. The most cost-effective method for detecting the cooling performance of air conditioners is to develop a system for quickly detecting the heating capacity and energy efficiency of refrigeration. This method can test the cooling, heating and energy efficiency ratio of air conditioners in the air conditioning production process. Pick out the model with low cooling capacity and low energy efficiency ratio to maximize product consistency and ensure good product quality.

Confirmation In fact, the air conditioner has a certain regularity when it starts up. It is equivalent to the charging of the capacitor. The ability to start up for a short period of time rises quickly, and the ability will stabilize at a value after a long time. The nominal capacity of the air conditioner we usually refer to is the stable value that the air conditioner has achieved for a long time under the conditions specified by the national standard. The situation on the production line is quite special. It has a short test time and does not reach a stable value. It is only in a stage where the capability is rising at a high speed. This is statistically speaking. The present invention is based on this feature, using a reasonable test and calculation method to calculate the cooling capacity online. Summary of the invention

In an aspect of the invention, a method of testing an air conditioner is provided, comprising the steps of:

51. Connect the empty outdoor unit to be called to the standard indoor unit in the commodity inspection room, start the air conditioner according to the existing test and test mode, and let the air conditioner run for a period of time;

52. Collecting temperature and humidity values of the air inlet and the air outlet of the standard indoor unit, and collecting an air volume value of the air outlet of the standard indoor unit;

53. Transmitting the temperature and humidity value and the air volume value to the data processing device;

54. Perform real-time calculation on the received temperature and humidity values and air volume values to predict the air conditioner cooling, heating capacity and energy efficiency ratio values;

55. Comparing the air conditioner refrigeration, heat generation and energy efficiency ratio values with preset inspection standards to determine whether the outdoor unit of the air conditioner to be tested meets the inspection standard;

56. If the outdoor unit of the air conditioner to be tested is judged as qualified, enter the next production procedure; otherwise, perform the offline rectification procedure. Preferably, after the step S5, the method further comprises the step of displaying the comparison result on the screen. Preferably, the real-time calculation in the step S4 further includes:

S40: Pre-determine, update or improve the parameters before starting the capability calculation;

S41: calling a calculation module;

S42: calculating a module to determine an average working condition;

S43: calculating a calculation formula of the module loading capability;

S44: The calculation module calculates the instantaneous capability value in real time, and the real-time calculation value and the test result are automatically stored in the test result database;

S45: The calculation module searches for the air conditioner capability data in the working condition from the test result database front run data;

S46: The calculation module searches a standard startup database of the working condition from the laboratory standard database to determine a reference object;

S47: The calculation module performs capability correction calculation according to the two databases in the foregoing steps S45 and S46, determines the capability coefficient of the calculation, and obtains the corrected air conditioner capability data;

S48: The calculation module reversely predicts the steady state air conditioner capability data value according to the capability coefficient;

S49: The calculation module converts the corrected air conditioner capability data into a capability value and an energy efficiency ratio under standard working conditions. Preferably, in step S46, the standard startup logic curve under the working condition is searched from the laboratory standard database, and the process of determining the reference object includes the following steps:

S460U obtains the import conditions based on the collected data, and gives the average working condition;

54602. Find a corresponding database or interpolate to form the average working condition data value;

54603. Obtain a characteristic parameter value of the test by a formula of a power-on capability change characteristic; S4604. Determine a startup characteristic curve under the average working condition. Preferably, the step of predicting the steady state air conditioner capability data value according to the capability coefficient in the step S48 comprises the following steps:

54801, considering the average working condition and the correction ability value after the first few minutes of processing;

54802, further performing the correction capability judgment;

54803. When the deviation of the correction capability is less than a predetermined value, enter a prediction calculation formula;

54804, benefiting the parameters of the measurement, inversely calculating the predicted air conditioner capability data value, and estimating the corresponding capability prediction value for each point;

54805. The mean value of all point prediction capabilities after the selected or set time point is less than the air conditioner capability data pre-value. Preferably, the existing fixed test mode is: if the outdoor unit of the air conditioner to be ll is a single cold machine, the cooling operation is directly performed for 3 minutes; if the outdoor unit of the air conditioner to be tested is a cold heading machine, the system is operated first. Heat for 1 minute and turn to cool for 3 minutes. In another aspect of the present invention, an apparatus for testing an empty satire is provided, comprising a standard indoor unit, an electrical control box 2, and a data processing apparatus fixed in a commodity inspection room, characterized in that:

The standard indoor unit is provided with a fixed inlet and outlet vent, the inlet and outlet vents are provided with a temperature and humidity sensor, and an air volume collector is arranged at the air outlet;

The electrical control box includes a signal acquisition device, a signal transmission device, and a result display device, and the signal collection device is configured to receive signals of the temperature and humidity sensor and the component collector;

The data processing device is coupled to the electrical control box for receiving and processing data. Preferably, the electrical control box further includes a power calculation device for measuring product power, and the power calculation device is a power meter. .

Preferably, the electric control box comprises an analog-to-digital conversion interface for collecting voltage, current, pressure signals, and collecting temperature and humidity signals measured by digital temperature and humidity sensors; and the signal transmitting device of the electric control box adopts two-way The wireless data transmission module is connected to the data acquisition device through the RS232 serial port.

Preferably, the data processing device is a computer capable of collecting and processing data, including a signal receiving device, receiving voltage, current, pressure signals from the electrical control box, and temperature and humidity measured by the digital temperature and humidity sensors. Signal, the computer signal receiving device is a two-way wireless data transmission module, and is connected to a serial port of the computer through a serial port. Preferably, the result display device is an indicator light, a liquid crystal display or a digital tube; the computer transmits the result to the two-way wireless data transmission module on the electric control box through a two-way wireless data transmission module connected to the computer, After receiving the result transmitted by the computer, the control box is displayed on the panel of the electric control box through the result display device.

Preferably, the computer is equipped with a calculation module, a test result database, and a laboratory standard database.

Preferably, the laboratory standard database includes laboratory data for each model under different test conditions.

Preferably, the computing module of the computer comprises:

An online capability calculation module that can statistically determine an average operating condition, a load capacity calculation formula, and calculate an instantaneous capability value;

The capacity correction calculation can be performed according to the two databases, and the capacity coefficient of the calculation is determined. Correction processing module for the air conditioner capability data after the forward; a reverse prediction data value processing module capable of backwardly predicting the steady state air conditioner capability data value according to the capability coefficient; the corrected air conditioner capability data can be converted into the standard working condition The condition value prediction data value processing module of the capability value and the energy efficiency ratio. The device and method for testing air conditioner of the invention can quickly detect the refrigeration, heat generation and energy efficiency ratio of the air conditioner on the line, can pick out the model with low cooling and heating capacity, and maximize the consistency of the product, thereby ensuring each unit. The factory air conditioner can reach the nominal nominal capacity, which guarantees the quality of the air conditioner.

DRAWINGS

Figure 1 is a device for testing air conditioners;

Figure 2 is a schematic diagram of the real-time calculation process of the computer in the present invention. Detailed ways

1 is an apparatus for testing an air conditioner 3 according to the present invention, which includes a standard indoor unit 1, an electric control box 2, and a data processing device that are assigned in a commodity inspection room. The standard indoor unit is equipped with a fixed inlet and outlet port. The inlet and outlet ports are provided with a temperature and humidity sensor, and an air volume collector is arranged at the air outlet. The data processing device is a computer that can perform data collection and data processing. The electrical control box 2 includes a signal acquisition device, a signal transmission device, and a result display device. The signal collecting device is used for receiving signals of the temperature and humidity sensor and the component collector; the signal transmitting device is used for transmitting signals, and the two-way wireless data transmission module can be used to connect with the data collecting device through the RS232 serial port; the result display device is used for the user (for example) The tester) displays measurement data, test results, and the like. The electrical control box 2 also includes a power calculation device for measuring the power of the product. Such a power calculation device can be a power meter, especially for measuring the power of the inverter air conditioner. The electrical control box 2 also includes an analog to digital conversion interface for collecting voltage, current, and pressure signals, and for collecting temperature and humidity signals measured by the digital temperature and humidity sensors. In this embodiment, the data processing device is a computer that performs data collection and data processing, and includes a signal receiving device. The signal receiving device is a two-way wireless data transmission module, which is used to receive voltage, current, pressure signals from the electrical control box 2, and temperature and humidity signals of the digital temperature and humidity sensors through the RS232 serial port and the serial port of the computer. .

The computer (that is, the data processing device) transmits the result to the bidirectional line data transmission module on the electric control box 2 through the two-way wireless data transmission module, and after the electronic control box 2 receives the result transmitted by the computer, the result display device is powered Displayed on the panel of the control box 2. The result display device is an indicator light, a liquid crystal display or a digital tube.

The computer is equipped with a calculation module, a test result database, and a laboratory standard database. The laboratory standard database includes laboratory data for each model under different test conditions. The computing modules of the computer include:

The calculation module for calculating the average working condition, the loading capacity calculation formula and calculating the instantaneous capability value can be calculated;

The capability correction calculation can be performed according to the two databases, the capability coefficient of the calculation is determined, and the corrected air conditioner capability data correction processing module is obtained;

A reverse prediction data value processing module capable of backward predicting a steady state air conditioner capability data value according to a capability coefficient;

The corrected air conditioner capability data can be converted into a standard condition prediction data value processing module of the capability value and the energy efficiency ratio under the standard working condition. When the air conditioner is in the production process, when the online inspection is carried out in the commodity inspection room, the usual operation procedure For: The air conditioner starts for a certain period of time, first heats for a certain period of time and then turns to the cooling state. During this operation, the temperature and humidity values collected by the temperature and humidity sensors are transmitted to the computer in real time through wireless transmission or any other transmission method. The calculation module is called to perform real-time calculation; the real-time calculation value and the test result are automatically stored in the test result database; in the calculation, the capability data in the pre-operational data of the database can be accessed in real time; a laboratory standard database is established, in the test process Find the standard startup running curve under the working condition from the standard database, determine the reference object; perform the capability correction calculation according to the two databases, determine the capacity coefficient of the calculation; and predict the steady state capability value according to the capability coefficient; The value is converted into the capacity value under the nominal condition of the national standard; a power meter is added to the detection device, and the energy efficiency ratio is calculated by borrowing the capability value; thus the computer realizes the capability calculation.

When the computer calculates the cooling capacity of the air conditioner, using the principle of the coma method, knowing the dry bulb and wet bulb temperature of the air inlet, the dry bulb and wet bulb temperature of the hurricane, and the air volume value, the cold heat can be calculated. Value. The dry bulb and wet bulb temperature of the air inlet, the dry bulb and the wet bulb temperature of the air outlet are collected by the temperature and humidity sensors, and the air volume is collected by the air volume collector, or the air volume precision is not very high, because In the standard room machine, the amount of air entering and exiting the air can be regarded as a fixed value, and it is also known. Therefore, when five parameters are known, the value of the cooling and heating amount can be completely calculated. The method of testing an air conditioner using the apparatus shown in FIG. 1 includes the following steps:

S1: connecting the outdoor unit of the air conditioner to be tested and the standard indoor unit in the commodity inspection room to the circuit and the pipeline, starting the air conditioner according to the existing fixed test mode, and letting the air conditioner run for a period of time; for example, one of the present Some fixed test methods are: If it is a single cold machine, run the cooling directly.

3 minutes, if it is a heating and cooling machine, first run heating for 1 minute and then cool for 3 minutes; S2: Collect one or more temperature and humidity sensors installed in the air inlet and outlet of the standard indoor unit to collect the temperature and humidity values of the air inlet and outlet, and transmit the signal to the signal collection device of the electric control box in real time; install an air volume at the air outlet a collector for collecting air volume;

S3: sending the temperature and humidity data of the air inlet and the air outlet to the computer signal receiving device through the signal transmitting device of the electric control box;

S4: The computer calls the calculation module to perform real-time calculation to predict the air conditioner refrigeration, heat generation and energy efficiency ratio values;

S5: The computer compares the values of the air conditioner, the cold, the heat, and the energy efficiency ratio with the inspection standard, and determines whether the outdoor unit of the air conditioner to be tested meets the inspection standard;

S6-: If the outdoor unit of the air conditioner to be tested is judged as qualified, the next production procedure is entered; otherwise, the offline rectification procedure is performed. In another embodiment, after the computer completes the foregoing step S5, the following operations are performed: S5Q: transmitting the comparison result to the two-way wireless data transmission module on the electronic control box through the two-way wireless data transmission module connected to the computer;

S51: After receiving the result transmitted by the computer, the electronic control box is displayed on the panel of the electronic control box through the result display device. In one embodiment, when performing the real-time calculation of the above step S4, the computer includes the following steps:

S40: The computer pre-determines, updates or perfects the parameters before starting the capability calculation;

S41: The computer calls the calculation module;

S42: calculating a module to determine an average working condition; S43: calculating a calculation formula of the module loading capability;

S45: The calculation module searches for the air conditioner capability data in the working condition from the pre-running data of the test result database;

S47: The calculation module performs capability correction calculation according to the two databases in the foregoing steps S4 & S46, determines the capability coefficient of the calculation, and obtains the corrected air conditioner capability data;

S49: The calculation module converts the corrected air conditioner capability data into a capability value and an energy efficiency ratio under standard working conditions. In the above step S46, the standard startup running curve under the working condition is searched from the laboratory standard database, and the process of determining the reference object includes the following steps:

S460 obtains the import conditions based on the collected data, and gives the average working condition;

54603. Obtain a characteristic parameter value of the test by a formula of a power-on capability change characteristic;

54604. Determine a starting characteristic curve under the average working condition. In the above step S48, the process of predicting the steady state air conditioner capability data value based on the capability coefficient includes the following steps:

S4801, considering the average working condition and the correction ability value after the first few minutes of processing; 54802, further performing the correction capability judgment;

54804, using the parameters of the measurement, inversely calculating the predicted air conditioner capability data value, and estimating the corresponding capability prediction value for each point;

54805. The mean value of all point prediction capabilities after the selected or set time point is less than the predicted value of the air conditioner capability data. Due to the frequent changes in the working conditions of the commodity inspection room, especially the relative humidity, in order to ensure the accuracy of the prediction, we can give the corresponding standard database table for the temperature range of the commodity inspection room. This data requirement includes the ability value, current, voltage, high and low pressure, and related temperature values from start-up to stable every five seconds. When the average * working condition cannot be directly obtained from the database, the near-condition interpolation (optional interpolation method) is used.

Finally, through the data sheet of the product machine under the standard conditions and the capacity of the commodity inspection room, the comparison ability value of the standard condition is converted.

In order to ensure the suitability of the scheme, when the program is implemented, the setting options can be given, including the correction factor, the pre-correction judgment value setting, the prediction start time, and the related data setting, etc., in order to cope with possible data fluctuations and thousands. Disturbance, ensuring effective predictive prototype capability values and energy efficiency ratios. According to the above scheme, the data of the general model air conditioner collected online is calculated as follows: The final prediction ability is: 3312. 596W; 3250. 376W; 3241. 346W; 3269. 3431 Laboratory reference working capacity: 3332W; 3298W ; 3261W; 3300W.

The above calculation uses the upper and lower average conditions as the reference standard data. Therefore, the prediction ability is the deviation range: 3241~3312W. There is no calculation program correction and comparison of other setting conditions. Forecast situation at the time. The specific implementations listed above are not limited to the scope of the present invention, and various modifications and changes can be made without departing from the scope of the invention. For example, the open test equipment and method disclosed in the present invention can also be applied in a test room or in other environments.

Claims

Rights request

1. A method of testing an air conditioner, comprising the steps of:

51. Connect the outdoor unit of the air conditioner to be tested to the standard indoor unit in the commodity inspection room, start the air conditioner according to the existing surface test mode, and let the air conditioner run for a period of time;

55. Comparing the air conditioner order, the heat quantity and the energy efficiency ratio value with a preset inspection standard, and determining whether the outdoor unit of the air conditioner to be tested meets the inspection standard;

56. If the outdoor unit of the air conditioner to be tested is judged as qualified, the next production procedure is entered; otherwise, the offline rectification procedure is performed.

The method according to claim 1, characterized in that after the step S5, the method further comprises the step of: displaying the comparison result on the screen.

The method according to claim 1, wherein the real-time calculation in the step S4 further comprises:

S41: calling a calculation module;

S42: calculating a module to determine an average working condition;

S43: calculating a calculation formula of the module loading capability;

S44: The calculation module calculates the instantaneous capability value in real time, and the real-time calculation value and the test result are automatically stored in Test result database;

S49: The calculation module converts the corrected air conditioner capability data into a capability value and an energy efficiency ratio under standard working conditions.

The method according to claim 3, wherein the step S46 searches the laboratory standard database for the standard startup operation curve under the working condition, and the process of determining the reference object includes the following steps:

54601, according to the collected data, the import conditions are obtained, and the average working condition is given;

546 2. Find the corresponding database or interpolate to form the above average working condition data value;

54604. Determine a starting characteristic curve under the average working condition.

The method according to claim 3, wherein the step of predicting the steady state air conditioner capability data value based on the capability coefficient in the step S48 comprises the following steps:

54802, further performing the correction capability judgment;

54804, using the parameters of the measurement, inversely calculating the predicted air conditioner capability data value, each point Calculate the corresponding ability prediction value;

S4805. The mean value of all point prediction capabilities after the selected or set time point is less than the air conditioner capability data predicted value.

The method according to any one of claims 1 to 5, wherein the existing fixed test mode is: if the outdoor unit of the air conditioner to be tested is a single cold machine, the cooling operation is directly performed for 3 minutes. If the outdoor unit of the air conditioner to be tested is a cold heading machine, it is first run for 1 minute and then cooled for 3 minutes.

7. A device for testing empty space, comprising a standard room F3⁄4 machine, an electronic control box and a data processing device fixed in the commodity inspection room, characterized in that:

The standard indoor unit is set!! a predetermined inlet and outlet port, the inlet and outlet ports are provided with a temperature and humidity sensor, and an air volume collector is arranged at the air outlet;

The electrical control box includes a signal acquisition device, a signal transmitting device, and a result display device, and the signal collecting device is configured to receive signals of the temperature and humidity sensor and the component collector;

The data processing device is coupled to the electrical control box for receiving and processing data.

8. The apparatus for testing an air conditioner according to claim 7 of claim 29, wherein the electric control box further comprises a power calculation device for measuring product power, wherein the power calculation device is a power meter. .

9. The apparatus for testing an air conditioner according to claim 7 or 8, wherein the electric control box comprises an analog to digital conversion interface for collecting voltage, current, pressure signals, and collecting digital temperature, The temperature and humidity signals measured by the humidity sensor; the signal transmitting device of the electric control box adopts a two-way wireless data transmission module, and is connected to the data acquisition device through the RS232 serial port.

10. The apparatus for testing an air conditioner according to claim 9, wherein the data processing device is a computer that can perform data collection and processing data, and includes a signal receiving device. Receiving voltage, current, pressure signals from the electrical control box, and temperature and humidity signals measured by the digital temperature and humidity sensors. The computer signal receiving device is a two-way wireless data transmission module connected to the serial port of the computer through the RS232 serial port.

11. The apparatus for testing an air conditioner according to claim 10, wherein said result display means is an indicator light, a liquid crystal display or a digital tube; said computer is connected to a computer by two-way wireless data transmission The module sends the result to the two-way wireless data transmission module on the electric control box. After receiving the result transmitted by the computer, the electronic control box displays the result display device on the panel of the electric control box.

The apparatus for testing an air conditioner according to claim 11, wherein the computer is provided with a calculation module, a test result database, and a laboratory standard database.

13. Apparatus for testing an air conditioner according to claim 12, wherein said laboratory standard database includes laboratory data for each model under different test conditions.

The device for testing an air conditioner according to claim 12 or 13, wherein the calculation module of the computer comprises: - a statistically determining an average working condition, a calculation formula of the loading capacity, and calculating an instantaneous capability value. Online capability calculation module;

The capability correction calculation can be performed according to the two databases, the capability coefficient of the calculation is determined, and the corrected processing module of the corrected air conditioner capability data is obtained;

A reverse predicted data value processing module capable of backward predicting a steady state air conditioner capability data value according to a capability coefficient; the corrected air conditioner capability data can be converted into a standard condition data value and an energy efficiency ratio Processing module.