CN102636361B - Refrigerator performance detecting method and temperature compensating method - Google Patents

Abstract

The invention discloses a refrigerator performance detecting method. A temperature data collector collects temperature information in a refrigerator and transmits the information to an industrial personal computer; a data processing system is arranged on the industrial personal computer and used for storing and displaying the temperature information; a signal transmitting and receiving device for wireless transmission, an input module capable of writing in parameter instructions, a comparator and a timer are arranged in the industrial personal computer and the data collector. The refrigerator performance detecting method comprises the following steps of: 1) setting an acceptable temperature value T in the input module; 2) reading and storing temperature Ta collected by the temperature data collector every t when the timer begins timing; and 3) reading the current temperature value Tb when the timer stops timing, and comparing Tb with T, if Tb is smaller than or identical to T, outputting a result that the performance is acceptable, and if Tb is greater than T, outputting a result that the performance is unacceptable. The method disclosed by the invention can be used for detecting a plurality of refrigerators at the same time, and a temperature compensating module can be used for exactly evaluating the performance of the refrigerators at different temperatures, so that the testing time of the refrigerators is reduced.

Description

Refrigerator method for testing performance and temperature compensation

Technical field

The present invention relates to a kind of refrigerator method for testing performance and temperature compensation.

Background technology

Refrigeration is the Core Feature of refrigerator, and the factory inspection for refrigeration performance is that refrigerator product comes into the market requisite one link of before sales.The program of the factory testing of existing refrigeration for refrigerator performance is after refrigerator enters detection line, point for measuring temperature is arranged in refrigerator, point for measuring temperature connects the temperature data acquisition device of refrigerator outside, according to certain detection ordering and the time interval, the temperature data of industrial computer reading temperature data harvester, to detect refrigeration performance by requirement of dispatching from the factory and judges.Current refrigerator temperature data collector and industrial computer all adopt wired connection mode, industrial computer and temperature data acquisition device are generally apart from each other, make connecting line longer and need design a comparatively ideal cabling scheme just detection place to be made comparatively neatly, not affect passageway unobstructed.Another shortcoming of this mode is that the performance judgment of refrigerator and monitor and detection process need on-the-spot special messenger's operations on detection line, checkout equipment can not move, particularly for the experimental test of development, chamber must be moved to Test Field, bring very big inconvenience to research staff's Test And Research Work.

In addition, current refrigerator Performance Detection all needs first refrigerator to be placed a period of time under standard ambient temperature, make the temperature in its case reach standard ring temperature just to start to detect, thus by set judgment criterion, refrigeration for refrigerator effect is made an appraisal, thus usually need to build special constant temperature laboratory, and in laboratory, will constant temperature system be set, need the expenditures that input one is huge.

Summary of the invention

The technical problem to be solved in the present invention is, for the deficiency that above-mentioned prior art exists, provides a kind of and detects the accurately moveable refrigerator method for testing performance of quick, easy and simple to handle, test-bed.

Another object of the present invention is to provide that a kind of testing environment temperature range is wide, adjustable parameters value thus refrigerator performance is made to the temperature compensation of rational evaluation.

Technical scheme of the present invention is: a kind of refrigerator method for testing performance, temperature data acquisition device gathers the temperature inside the box information of refrigerator and is transferred on industrial computer, on described industrial computer, temperature information is stored on memory with set form and also shows over the display by setting data disposal system, the signal sending and receiving apparatus of wireless transmission is provided with in described industrial computer and data acquisition unit, arranging in described industrial computer can the load module of write parameters instruction, comparer and timer, and refrigerator Performance Detection performs following steps:

1) qualified temperature value T is set at load module;

2) start timing at timer play the temperature Ta every t reading temperature data collector and store;

3) at the end of timer, read current temperature value Tb, and compare with T, if Tb≤T, export pass result; If Tb > is T, then export defective result.

In above-mentioned method, described data handling system comprises central control module, data analysis module, data statistics module, data storage and output module.

In above-mentioned method, be provided with temperature signal collection circuit in described data acquisition unit, gather amplifying circuit, single-chip microcomputer main control unit circuit, communication module circuit, voltage-stabilized power supply circuit.

A kind of temperature compensation of refrigerator method for testing performance, setting suitable environment temperature value T1, setting comprise different difference temperature difference correspondence that is interval and corresponding offset and show, read environment temperature Tx by described temperature data acquisition device, when Tx is not equal to T1, perform temperature compensation subroutine:

1) Tx-T1=A is calculated;

2) show to compare by corresponding with the temperature difference for A, and draw corresponding offset B;

3) qualified temperature value T is set at load module, starts timing at timer and play the temperature Ta every t reading temperature data collector and store, at the end of timer, read current temperature value Tb;

4) if Tb+B≤T, pass result is exported; If Tb+B > is T, then export defective result.

In above-mentioned method, described compensation B is positive number or negative.

The invention has the beneficial effects as follows, industrial computer is built with data processing software, data processing software can according to the data collected, whether automatic decision refrigerator is qualified, compared with artificial or semi-automatic detection, its False Rate and misdetection rate low, temperature data acquisition device part of data acquisition adopts multiple station, can detect multiple stage refrigerator, its work efficiency is improved simultaneously.Temperature compensation module can make refrigerator not need be reduced to predetermined precooling temperature and export a temperature compensation value, reduces refrigerator pre-coo time.

Accompanying drawing explanation

Fig. 1 is hardware configuration schematic diagram of the present invention;

Fig. 2 is temperature data collecting system structured flowchart of the present invention.

Embodiment

Below by way of embodiment, and the invention will be further described by reference to the accompanying drawings.

See Fig. 1-2, refrigerator performance test apparatus of the present invention comprises test cabinet 1, temperature sensor 5 and temperature data acquisition device 4, sending and receiving apparatus 8, industrial computer 7.In test cabinet, be provided with air-conditioner set 2 for keeping chamber temperatures constant, refrigerator 3 is placed on the test-bed of test cabinet.When test starts, temperature sensor 5 is placed on suitable position and dut temperature point in tested refrigerator 3.Each temperature sensor 5 is housed connect 6 by p-wire and receive in temperature data acquisition device 4.Data between industrial computer 7 and temperature data acquisition device 4 pass through sending and receiving apparatus 8 and transmit.One sending and receiving apparatus 8 is connected on industrial computer 7, and another sending and receiving apparatus 8 is arranged on temperature data acquisition device 4.Wireless temperature acquisition system of the present invention can automatically gather monitoring point temperature and send real time temperature data to industrial computer by wireless transmission method, thus the temperature of the effective purpose monitoring point of energy.Wireless temperature acquisition system, achieve the uninterrupted temperature survey to site environment and monitoring, the refrigerator temperature real-time change outside industrial computer room intuitively can be seen by industrial computer, Temperature sampler divides 60 groups, Real-time Collection can be carried out to 6X60=360 temperature spot, meanwhile, in Temperature sampler, communication module is set, Temperature sampler and industrial computer are mounted.

Hardware system mainly comprises following circuit: temperature signal collection circuit, collection amplifying circuit, single-chip microcomputer main control unit circuit, communication module circuit (sending and receiving apparatus), voltage-stabilized power supply circuit.Wherein, the change of temperature signal collection circuit direct measuring tempeature point resistance and temperature signal resistance resistance, produces the voltage signal of simulation, is converted to the discernible digital signal of single-chip microcomputer, by single-chip microcomputer process through A/D.Data acquisition unit main control unit adopts single-chip microcomputer as the core of whole circuit, controls the selection of acquisition channel, the process of data, and is connected with sending and receiving apparatus, carry out transmission and the communication of data.

See Fig. 2, be connected with temperature data acquisition box (onboard data collector) communication in industrial computer, receive temperature information and feed back detections, reading data order.Industrial computer can arrange refrigerator performance test time, product type, the test temperature difference by load module.Industrial computer is provided with temperature data disposal system, comprises central control module, data analysis module, data statistics module, data store and output module, artificial load module.When temperature data acquisition device is wirelessly transmitted to industrial computer, tester at load module input test dependent instruction temperature data, industrial computer just can start test duration, product type, the test temperature difference in data storage and each refrigerator of load module record, and draws each temperature curve by data statistics module.After having tested, data analysis module automatic decision test result, through central control module, and whether qualified at display display test refrigerator temperature, data store and output module outputs to the initial temperature of record, average ring temperature, initial the temperature inside the box, end time, test on display period simultaneously.

Test process is as follows:

Preparatory stage, by constant for test cabinet environment temperature under standard ring temperature (as 25 DEG C), the door body a period of time of opening test refrigerator 3 to make in it temperature at standard ring temperature state.At industrial computer load module, qualified temperature value T is set.The setting test duration.

Test starts, and be placed on by thermistor in case, refrigerator is adjusted to refrigerating state, and industrial computer timer starts timing, and the temperature Ta of per interval t reading temperature data second collector also stores.The detection digital independent of next round is entered again after reading full probe temperature point.

Test terminates, and reads current temperature value Tb, and compare with T at the end of timer, if Tb≤T, exports pass result; If Tb > is T, then export defective result.

Claims (1)

1. a refrigerator method for testing performance, temperature data acquisition device gathers the temperature inside the box information of refrigerator and is transferred on industrial computer, on described industrial computer, temperature information is stored on memory with set form and also shows over the display by setting data disposal system, it is characterized in that: the signal sending and receiving apparatus being provided with wireless transmission in described industrial computer and data acquisition unit, arranging in described industrial computer can the load module of write parameters instruction, comparer and timer, described data handling system comprises central control module, data analysis module, data statistics module, data store and output module, be provided with temperature signal collection circuit in described data acquisition unit, gather amplifying circuit, single-chip microcomputer main control unit circuit, communication module circuit, voltage-stabilized power supply circuit, industrial computer can arrange refrigerator performance test time, product type, the test temperature difference by load module, setting suitable environment temperature value T1, setting comprise different difference temperature difference correspondence that is interval and corresponding offset and show, and read environment temperature Tx by described temperature data acquisition device, when Tx is not equal to T1, refrigerator Performance Detection performs following steps:

1) Tx-T1=A is calculated;

2) show to compare by corresponding with the temperature difference for A, and draw corresponding offset B;

3) qualified temperature value T is set at load module, starts timing at timer and play the temperature Ta every t reading temperature data collector and store, at the end of timer, read current temperature value Tb;

4) if Tb+B≤T, pass result is exported; If Tb+B > is T, then export defective result;

Temperature sampler divides 60 groups, can carry out Real-time Collection to 360 temperature spots.