CN201497272U

CN201497272U - Air cooling frequency-conversion multi-door refrigerator capable of working with low noise at night

Info

Publication number: CN201497272U
Application number: CN200920044028XU
Authority: CN
Inventors: 王翔
Original assignee: Taizhou LG Electronics Refrigeration Co Ltd
Current assignee: Taizhou LG Electronics Refrigeration Co Ltd
Priority date: 2009-06-16
Filing date: 2009-06-16
Publication date: 2010-06-02
Anticipated expiration: 2019-06-16

Abstract

The utility model relates to an air cooling frequency-conversion multi-door refrigerator capable of working with low noise at night. The refrigerator comprises a photosensitive input unit, a refrigerator door switch, a central processing unit MCU, a variable frequency compressor driving unit, a variable frequency compressor, a variable-speed fan driving unit, a variable-speed fan, a magnet valve (VALE) driving unit and a magnet valve (VALE), wherein the central processing unit MCU is provided with an analogue-to-digital conversion part, a comparison part, a judgment part, a switching part and a timing part; the current ambient brightness of the refrigerator can be sensed through a light sensor arranged on a display board, differential intelligent control can be synthetically performed through the treatment of the central processing unit so as to determine current environment to be day time or late night, when the current environment is determined to be deep night, the variable frequency compressor runs under a low speed, and when the current environment is determined to be day time, the variable frequency compressor runs under a high speed. The utility model, under the premise of ensuring the performance of the refrigerator, reduces the noises of the refrigerator to a great extend through differential intelligent control, thereby providing more comfort for customers to use the refrigerator.

Description

A kind of air-cooled variable-frequency multi-door refrigerator of low noise work in the late into the night

Technical field

The utility model relates to a kind of household electrical appliance, particularly relates to a kind of air-cooled variable-frequency multi-door refrigerator of low noise work in the late into the night.

Background technology

Refrigerator has become town dweller's essential product as household electrical appliance, but because China is populous, and per capita living space is less, the noise that refrigerator produces often influences people's rest and sleep.And the noise of refrigerator mainly is the noise generation of compressor.

For the noise that the reduces refrigerator especially noise when using night, at present existing low noise refrigerator is judged night on daytime by photo resistance sensitization, make refrigerator compressor low cruise when working night, thus the noise that the compressor high-speed cruising of refrigerator brings when reducing the late into the night.Though, this mode noise at night that makes moderate progress, however the method at existing judgement night on daytime is not accurate enough, and it can not satisfy present many people night life, need use the situation of refrigerator at night.

Summary of the invention

The purpose of this utility model provides a kind of air-cooled variable-frequency multi-door refrigerator of low noise work in the late into the night, under the prerequisite of the performance that guarantees refrigerator, by differential Based Intelligent Control, reduce the noise of refrigerator to greatest extent, thereby make client when using refrigerator, feel more comfortable, convenient.To achieve these goals, the utility model is achieved through the following technical solutions:

The air-cooled variable-frequency multi-door refrigerator of a kind of low noise work in the late into the night of the present utility model comprises three tunnel photosensitive input blocks, CPU MCU, the frequency-changeable compressor driver element, the variable speed fan driver element, the solenoid-driven unit, frequency-changeable compressor, variable speed fan and magnetic valve, the output of described CPU MCU respectively with the frequency-changeable compressor driver element, the variable speed fan driver element is connected with the solenoid-driven unit, described frequency-changeable compressor driver element is connected with frequency-changeable compressor, described variable speed fan driver element is connected with variable speed fan, and described solenoid-driven unit is connected with magnetic valve; Described CPU MCU is arranged in the master board; Wherein said CPU MCU comprises mould/number (A/D) converter section, comparing section, judging part, switching part, the input of described mould/number conversion portion is connected with refrigerator door open-close with at least one photosensitive input block, be used for the input of photosensitive input block is converted to the AD value, and comparing section is used for the AD value of mould/number conversion portion output is compared the minimum AD value of output, judging part judges that by the AD value and the predetermined reference value of comparing section output the light that photosensitive input block detects satisfies the light benchmark in the daytime or the late into the night, switching part is according to the result of judging part, switch to the pattern of working by day or the late into the night mode of operation.

The utility model has the advantages that: under the prerequisite of the performance that guarantees refrigerator, by differential Based Intelligent Control, reduce the noise of refrigerator to greatest extent, thereby make client when using refrigerator, feel more comfortable, particularly in order to give the comfortable sleep environment.

Description of drawings

Fig. 1 is the block diagram of CPU.

Fig. 2 is that 72 hours light intensity changes broken line graph.

Fig. 3 is the flow chart of control air-cooled variable-frequency multi-door refrigerator low noise in late into the night work.

The specific embodiment

Below in conjunction with drawings and Examples invention is described in detail.

Shown in the air-cooled variable-frequency multi-door refrigerator electricity theory structure of low noise work in the late into the night described in the utility model, comprise three photosensitive input blocks, CPU MCU, the frequency-changeable compressor driver element, the variable speed fan driver element, VALVE solenoid-driven unit, frequency-changeable compressor, variable speed fan and VALVE magnetic valve, described CPU MCU output respectively with the frequency-changeable compressor driver element, the variable speed fan driver element is connected with VALVE solenoid-driven unit, described frequency-changeable compressor driver element is connected with frequency-changeable compressor, described variable speed fan driver element is connected with variable speed fan, and described VALVE solenoid-driven unit is connected with the VALVE magnetic valve.

Wherein, CPU MCU is arranged in the master board of refrigerator, CPU MCU comprises mould/number (A/D) converter section, comparing section, judging part, switching part, timing portion, the input of mould/number conversion portion is connected with refrigerator door open-close with three photosensitive input blocks, is used for the input of three photosensitive input blocks is converted to the AD value; And comparing section is used for three AD values of mould/number conversion portion output are compared the minimum AD value of output; Judging part judges that by the AD value and the predetermined reference value of comparing section output the light that photosensitive input block detects satisfies the light benchmark in the daytime or the late into the night; Switching part according to the result who judges switch the pattern that works by day or the late into the night mode of operation; Timing portion is used for refrigerator open time or light duration that brightens is carried out timing.

Photosensitive input block is arranged on the display floater of refrigerator, because display floater has light transmission, can really make light sensors arrive light source, in addition, two ends on display floater top, the roughly centre position of display floater bottom respectively is provided with an optical sensor, be provided with three optical sensors at diverse location, the light of different azimuth can be detected by sensor, the light source that prevents certain orientation is not detected because of the limitation of the position of sensor settings, that is to say that the set optical sensor of the present invention can accuracy react the light luminance of environment instantly than the highland.

After the intensity of light is handled through the A/D converter section of CPU MCU, the scope of the AD value that obtains is 0～255 (0～0XFF hexadecimal), the light intensity benchmark that daytime is satisfied in setting is: AD value＜100, the light intensity benchmark that the late into the night is satisfied in setting is: AD value＞220, in the continuous 72 hours calculating of MCU after the refrigerator energising, if continuous 3 times, in each 24 hours period, there is the 8 hour time of surpassing to satisfy AD value＜100 (benchmark on daytime), have surpass 5 hour time satisfy AD value＞220 think so the environment for use of this refrigerator have comparatively stable daytime and the late into the night environment, can enter mode of operation in the late into the night.Actual late into the night, mode of operation was in the middle of 5 hours 4 hours, was to wait for the time of judging because there is half an hour the front, and surplus half an hour is left in the back, and during the actual use of user, it is more accurate to control like this.

When refrigerator work, CPU MCU carries out pattern judgement in the late into the night on daytime, as mentioned above earlier by analyzing the input voltage of photosensitive input block, the light intensity benchmark that daytime is satisfied in setting is: AD value＜100, setting is satisfied the light intensity benchmark in the late into the night and is: AD value＞220.After the refrigerator energising, after the A/D converter section of CPU MCU is changed the input value of three photosensitive input blocks, its value is exported to the comparing section of CPU MCU, comparing section compares three AD values, selects the brightest value of light, the minimum output of AD value just, again with the judging part of exporting to of comparing section, if AD value＜100 then are judged as the light intensity benchmark that satisfies daytime, refrigerator enters the pattern of working by day; If AD value＞220 then are judged as the light intensity benchmark that satisfies the late into the night, refrigerator enters mode of operation in the late into the night.

At dead of night, the user also can use refrigerator sometimes, if use often, when refrigerator is appointed at dead of night mode of operation, the refrigeration of refrigerator can variation, so, be in the late into the night during mode of operation at refrigerator, the timing portion of CPU starts working, when refrigerator door open-close is opened or ambient light brighten, timing portion picks up counting, when the refrigerator open time surpasses 2 minutes or ambient light brightens the duration during greater than 45 minutes, be converted to and be the pattern of working by day, otherwise continue as mode of operation in the late into the night;

As above said, confirm the ambient brightness that refrigerator is in now by the optical sensor on the display floater, to clock by the time on the CPU again, comprehensive affirmation is the late into the night or daytime now.In the time of by day, compressor is with the running of higher power, and fan is with higher revolution running, and magnetic valve switches with more higher frequency and guarantees that each chamber fully freezes, and controls the temperature that temperature sets than the user simultaneously and reduces by 0.5 degree.Client uses refrigerator more frequent during this period of time, and environment temperature is also than higher, and refrigerator refrigeration intensity is big, and noise also can be a little more greatly, but simultaneously environmental noise also relatively more greatly, so client is not obvious to the perception of noise.In the time of at dead of night, compressor is with lower power running, and fan is with lower revolution running, and magnetic valve switches with frequency more on the low side, controls temperature rising 0.5 degree that temperature is set than the user simultaneously.Refrigerator is in steady operational status during this period of time, environment temperature is a little relatively also low, the intensity of refrigerator refrigeration is little also to meet the demands, but noise has obtained obvious reduction, under a little bit smaller relatively situation of environmental noise, client can not be subjected to the interference effect of noise, and pleasant environment for use can be arranged.

In the utility model, when refrigerator at dead of night during mode of operation, CPU MCU sends signal and transfers to frequency-changeable compressor driver element, variable speed fan driver element, VALVE solenoid-driven unit respectively, control frequency-changeable compressor, variable speed fan and VALVE magnetic valve respectively by each driver element again and reduce compressor frequency, reduce rotation speed of the fan and reduce the switching times operation.

Claims

1. the air-cooled variable-frequency multi-door refrigerator of a low noise job in the late into the night, it is characterized in that: comprise the photosensitive input block at least one road, CPU MCU, the frequency-changeable compressor driver element, the variable speed fan driver element, the solenoid-driven unit, frequency-changeable compressor, variable speed fan and magnetic valve, the output of described CPU MCU respectively with the frequency-changeable compressor driver element, the variable speed fan driver element is connected with the solenoid-driven unit, described frequency-changeable compressor driver element is connected with frequency-changeable compressor, described variable speed fan driver element is connected with variable speed fan, and described solenoid-driven unit is connected with magnetic valve; Described CPU MCU is arranged in the master board.

2. the air-cooled variable-frequency multi-door refrigerator of low noise work in the late into the night according to claim 1 is characterized in that: described CPU MCU also comprises timing portion.

3. the air-cooled variable-frequency multi-door refrigerator of low noise work in the late into the night according to claim 1 is characterized in that: described light sensor is arranged on the two ends on display floater top, and the centre position of display floater bottom respectively is provided with an optical sensor.