CN102519217A - Variable-frequency refrigerator and control method thereof - Google Patents

Abstract

The invention discloses a frequency-variable refrigerator, which comprises a master control panel, a refrigeration sensor, a freezing sensor, an environmental temperature sensor and a variable-speed fan. The refrigerator sensor, the freezing sensor and the environmental temperature sensor are connected with the master control panel, a variable-frequency compressor driving plate is connected with the master control panel and a power source, and a variable-frequency compressor is connected with the variable-frequency compressor driving plate. The master control panel controls the variable-frequency compressor and the variable-speed fan to enter different running modes after comprehensive analysis and computation according to temperatures detected by the various sensors and instructions transmitted by a display panel, and the refrigerator can effectively assuredly quickly achieve the optimal running state under various working conditions.

Description

Frequency conversion refrigerator and control method thereof

Technical field:

The present invention relates to a kind of frequency conversion refrigerator and control method thereof.

Background technology:

Existing frequency conversion refrigerator is mainly considered the rotating speed control of frequency-changeable compressor; Progressively begin to have used simultaneously variable speed fan and frequency-changeable compressor on the now refrigerator; Also do not take all factors into consideration under the different condition a kind of concrete control method of variable speed fan and frequency-changeable compressor rotating speed at present.

Summary of the invention:

For overcoming the defective of prior art; The object of the present invention is to provide a kind of frequency conversion refrigerator and control method thereof; Master control borad is according to the instruction of detected each sensor temperature and display board transmission; After analysis-by-synthesis was calculated, control frequency-changeable compressor, variable speed fan got into different running mode, have guaranteed that effectively refrigerator can both reach optimal operational condition apace under various working conditions.

Technical solution problem of the present invention adopts following technical scheme:

A kind of frequency conversion refrigerator; Comprise master control borad; The refrigeration sensor that is connected with master control borad, freezing sensor, ring temperature sensor and variable speed fan, the frequency-changeable compressor drive plate is connected with said master control borad and power supply, and frequency-changeable compressor is connected with said frequency-changeable compressor drive plate.

Be connected with display board on the said master control borad.

The said frequency-changeable compressor range of speeds is S1～S2, and wherein S1 is a minimum speed, and S2 is a maximum speed; The said variable speed fan range of speeds is S3～S4, and wherein S3 is a minimum speed, and S4 is a maximum speed, and it is T1～T2 that said ring temperature sensor detects the ambient temperature scope.

Compared with present technology, beneficial effect of the present invention is embodied in:

Master control borad is according to the instruction of detected each sensor temperature and display board transmission; After analysis-by-synthesis is calculated; Control frequency-changeable compressor, variable speed fan get into different running mode, have guaranteed that effectively refrigerator can both reach optimal operational condition apace under various working conditions.

Description of drawings:

Fig. 1 is the electrical schematic diagram of part involved in the present invention.

Fig. 2 is a control method FB(flow block) of the present invention.

Below pass through the specific embodiment, and in conjunction with the accompanying drawings the present invention is described further.

The specific embodiment:

Embodiment: referring to Fig. 1,2; The frequency conversion refrigerator of present embodiment; Refrigerator display panel and master control borad adopt the mode of agreement to carry out communication, and the refrigerator master control borad is gathered each chamber, environment temperature through a plurality of temperature sensors (refrigeration sensor, freezing sensor, ring temperature sensor); The refrigerator master control borad directly drives variable speed fan through hardware circuit, software and moves with different rotating speed; The refrigerator master control borad is passed to the frequency-changeable compressor drive plate with the rotary speed information of needs through communications protocol, and frequency-changeable compressor drive plate Driven Compressor is by specifying the rotating speed operation.

Setting the frequency-changeable compressor range of speeds is S1～S2, and wherein S1 is a minimum speed, and S2 is a maximum speed; The said variable speed fan range of speeds is S3～S4, and wherein S3 is a minimum speed, and S4 is a maximum speed, and it is T1～T2 that said ring temperature sensor detects the ambient temperature scope.

The control method of frequency conversion refrigerator of the present invention comprises the steps:

1) the refrigerator energising starts;

2) judge whether refrigeration, freezing sensor temperature satisfy compressor start condition,

If do not satisfy, then return step 2);

If satisfy, then get into next step;

3) master control borad sends instruction according to display board, whether judges current set condition at quick-frozen or fast cold state,

If then the drive variable frequency compressor moves with the S4 rotating speed with S2 rotating speed, variable speed fan;

If not, get into next step 4);

4) master control borad control method:

1. at first divide the fan rotating speed to be divided into n five equilibrium, i.e. compressor rotary speed compressor rotary speed, speed change: $\{S1,S1+\frac{S2-S1}{n},$ $S1+\frac{2(S2-S1)}{n},S1+\frac{3(S2-S1)}{n},\·\·\·\·\·\·,S2\};$ The variable speed fan rotating speed: $\{S3,S3+\frac{S4-S3}{n},$ $S3+\frac{2(S4-S3)}{n},S3+\frac{3(S4-S3)}{n},\·\·\·\·\·\·,S4\};$ To encircle temperature sensor detected temperatures scope T1～T2 and carry out segmentation with temperature T 0, T1＜T0＜T2 wherein, being segmented into is T1～T0 and two stages of T0～T2, is divided into the n five equilibrium in T0～T2 scope: $\{T0,T0+\frac{T2-T0}{n},T0+\frac{2(T2-T0)}{n},T0+\frac{3(T2-T0)}{n},\·\·\·\·\·\·,T2\};$

2. judge that current ambient temperature Th drops on the interval of T1～T2:

Interval at T1～T0, frequency-changeable compressor, variable speed fan acquiescence were with S1, the operation of S3 rotating speed t1 minute; As interval at T0～T2, drop on the branch scopes such as n of T0～T2 according to Th, select corresponding frequency-changeable compressor rotating speed Sx, variable speed fan rotating speed Sy operation t1 minute, get the corresponding rotating speed of interval right margin; As: $T0+\frac{2(T2-T0)}{n}<\mathrm{Th}<$ $T0+\frac{3(T2-T0)}{n},$ Then frequency-changeable compressor with $S1+\frac{3(S2-S1)}{n},$ Variable speed fan with $S3+\frac{3(S4-S3)}{n}$ Rotating speed operation t1 minute;

3. after moving t1 minute with mode in 2.; Judge that refrigeration sensor temperature Tc, freezing sensor temperature Td and target temperature refrigerate the degree of approach of break point Tcoff, freezing break point Tdoff, divided by N, wherein N gets positive integer with the value of Tc-Tcoff, Td-Tdoff; The result keeps integer part N1 and N2; Get the greater among N1, the N2, suppose N2＞N1, revise rotating speed on the rotating speed basis of then frequency-changeable compressor, variable speed fan being confirmed do in 2. $\mathrm{Sx}+\frac{N2(S2-S1)}{n},$ $\mathrm{Sy}++\frac{N2(S4-S3)}{n},$ But maximum is no more than S2, S4; After this if not having to detect satisfies condition in the step 3), then after t2 minute, repeat 3. to detect by revised rotating speed operation; Revised once in the every interval t2 of rotating speed minute, operation is up to compressor shutdown;

4. return step 2).

Claims (4)

1. frequency conversion refrigerator; Comprise master control borad, the refrigeration sensor that is connected with master control borad, freezing sensor, ring temperature sensor and variable speed fan is characterized in that; The frequency-changeable compressor drive plate is connected with said master control borad and power supply, and frequency-changeable compressor is connected with said frequency-changeable compressor drive plate.

2. a kind of frequency conversion refrigerator according to claim 1 is characterized in that, is connected with display board on the said master control borad.

3. a kind of frequency conversion refrigerator according to claim 1 is characterized in that, the said frequency-changeable compressor range of speeds is S1～S2, and wherein S1 is a minimum speed, and S2 is a maximum speed; The said variable speed fan range of speeds is S3～S4, and wherein S3 is a minimum speed, and S4 is a maximum speed, and it is T1～T2 that said ring temperature sensor detects the ambient temperature scope.

4. the control method of the described frequency conversion refrigerator of claim 3 is characterized in that comprising the steps:

1) the refrigerator energising starts;

2) judge whether refrigeration, freezing sensor temperature satisfy compressor start condition,

If do not satisfy, then return step 2);

If satisfy, then get into next step;

3) master control borad sends instruction according to display board, whether judges current set condition at quick-frozen or fast cold state,

If then the drive variable frequency compressor moves with the S4 rotating speed with S2 rotating speed, variable speed fan;

If not, get into next step 4);

4) master control borad control method:

1. at first divide the fan rotating speed to be divided into n five equilibrium, i.e. compressor rotary speed compressor rotary speed, speed change: $\{S1,S1+\frac{S2-S1}{n},$ $S1+\frac{2(S2-S1)}{n},S1+\frac{3(S2-S1)}{n},\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;,S2\};$ The variable speed fan rotating speed: $\{S3,S3+\frac{S4-S3}{n},$ $S3+\frac{2(S4-S3)}{n},S3+\frac{3(S4-S3)}{n},\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;,S4\};$ To encircle temperature sensor detected temperatures scope T1～T2 with temperature

T0 carries out segmentation, T1＜T0＜T2 wherein, and being segmented into is T1～T0 and two stages of T0～T2, is divided into the n five equilibrium in T0～T2 scope: $\{T0,T0+\frac{T2-T0}{n},T0+\frac{2(T2-T0)}{n},T0+\frac{3(T2-T0)}{n},\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;,T2\};$

2. judge that current ambient temperature Th drops on the interval of T1～T2:

Interval at T1～T0, frequency-changeable compressor, variable speed fan acquiescence were with S1, the operation of S3 rotating speed t1 minute;

As interval at T0～T2, drop on the branch scopes such as n of T0～T2 according to Th, select corresponding frequency-changeable compressor rotating speed Sx, variable speed fan rotating speed Sy operation t1 minute, get the corresponding rotating speed of interval right margin; As: $T0+\frac{2(T2-T0)}{n}<\mathrm{Th}<$ $T0+\frac{3(T2-T0)}{n},$ Then frequency-changeable compressor with $S1+\frac{3(S2-S1)}{n},$ Variable speed fan with $S3+\frac{3(S4-S3)}{n}$ Rotating speed operation t1 minute;

3. after moving t1 minute with mode in 2.; Judge that refrigeration sensor temperature Tc, freezing sensor temperature Td and target temperature refrigerate the degree of approach of break point Tcoff, freezing break point Tdoff, divided by N, wherein N gets positive integer with the value of Tc-Tcoff, Td-Tdoff; The result keeps integer part N1 and N2; Get the greater among N1, the N2, suppose N2＞N1, revise rotating speed on the rotating speed basis of then frequency-changeable compressor, variable speed fan being confirmed do in 2. $\mathrm{Sx}+\frac{N2(S2-S1)}{n},$ $\mathrm{Sy}++\frac{N2(S4-S3)}{n},$ But maximum is no more than S2, S4; After this if not having to detect satisfies condition in the step 3), then after t2 minute, repeat 3. to detect by revised rotating speed operation; Revised once in the every interval t2 of rotating speed minute, operation is up to compressor shutdown;

4. return step 2).