CN103776234A - Refrigerator frequency conversion control method and application thereof - Google Patents

Abstract

The invention discloses a refrigerator frequency conversion control method and an application thereof. The refrigerator frequency conversion control method and the application thereof are characterized in that when a refrigerator is powered on for the first time, a compressor of the refrigerator runs in the highest frequency, starting rate of first N starting and stopping cycles of the compressor is calculated after the compressor continuously runs for N+1 starting and stopping cycles, and running frequency of the next start of the compressor is determined according to presupposed target starting rate. The refrigerator frequency conversion control method and the application thereof can fully play the advantage that rotational speed of compressor is alterable, enable the refrigerator to achieve the purposes of noise reduction and energy conservation.

Description

A kind of refrigerator method for controlling frequency conversion and application thereof

Technical field

The present invention relates to a kind of refrigerator method for controlling frequency conversion and application thereof, belong to refrigerator control field.

Technical background

Freezer compressor is divided into invariable frequency compressor and frequency-changeable compressor.Invariable frequency compressor product type is abundant, technology maturation, be widely used, but its frequency is immutable, and under certain operating mode, refrigerating capacity is definite value; Frequency-changeable compressor can be realized and change its rotating speed and then change compressor refrigerating capacity, can high-speed cruising at higher load condition lower compression machine, refrigerator can be lowered the temperature by fast-refrigerating, can maintain slow-speed of revolution operation at underload or stable state lower compression machine, refrigeration system efficiency is high, effectively reduce compressor start-stop frequency, make the temperature inside the box fluctuation little, noise is low.

At present, frequency-changeable compressor is mainly adopting the mode of " drawing shelves " aspect rotating speed control, according to environment temperature and the temperature inside the box, compressor revolution is divided different gears, compressor operating frequency is determined by current residing environment temperature and the temperature inside the box, when refrigerator compartment temperature is higher than this chamber starting point temperature certain when value, compressor revolution can rise to certain gear accordingly.In fact suitable compressor refrigerating capacity demand is not only relevant to environment temperature, also comprises the load variations of refrigerator own, and such as refrigerator open or put into load etc., therefore this control method is difficult to accomplish adjust timely and effectively while being changed by casing state.As from the foregoing, existing frequency-changeable compressor FREQUENCY CONTROL technology fails to give full play to the feature of frequency-changeable compressor.

Summary of the invention

For overcoming existing technological deficiency, the object of the present invention is to provide a kind of refrigerator method for controlling frequency conversion and application thereof, can give full play to the advantage of frequency-changeable compressor variable speed, make refrigerator reach noise reduction, energy-conservation object.

The present invention is that technical solution problem adopts following technical scheme:

The feature of a kind of refrigerator method for controlling frequency conversion of the present invention is to carry out as follows:

Step 1: target setting Homes Using TV η₀, refrigerator powers on first, and compressor moves with maximum speed;

Step 2: in the time of the inferior shutdown of compressor operating to the (N+1), through type (1) obtains the refrigerator average Homes Using TV η in a front N continuous start-stop cycle_i:

η_i=compressor accumulated running time/total time (1)

Step 3: through type (2) obtains adjusts COEFFICIENT K_i:

K_i=η_i/η₀ (2)

Step 4: through type (3) obtains the running speed S of compressor while start next time_i:

S_i=K_i×S_(i-1) (3)

If arbitrary compartment temperature is higher than the starting point temperature T of chamber between described in refrigerator₁℃ time, the temperature difference between described compartment temperature and described starting point temperature is Δ T₁, through type (4) upgrades described running speed S_i, and operation (N+1) individual all after dates, recalculate average Homes Using TV η by formula (1) and formula (2)_iwith adjustment COEFFICIENT K_i, the running speed S of compressor while start next time to obtain_i;

S_i=S_(i-1)+K₁×ΔT₁ (4)

In formula (4), K₁for constant, span is 0-1500;

If the temperature difference that the temperature that interior arbitrary the chamber of refrigerator sets is lowered is Δ T₂, through type (5) upgrades described running speed S_i, and operation (N+1) individual all after dates, recalculate average Homes Using TV η by formula (1) and formula (2)_iwith adjustment COEFFICIENT K_i, the running speed S of compressor while start next time to obtain_i;

S_i=S_(i-1)+K₂×ΔT₂ (5)

In formula (5), K₂for constant, span is 0-1500;

If compressor continuous operating time is more than or equal to t1 minute, through type (6) upgrades described running speed S_i, and operation (N+1) individual all after dates, recalculate average Homes Using TV η by formula (1) and formula (2)_iwith adjustment COEFFICIENT K_i, the running speed S of compressor while start next time to obtain_i;

S_i=S_(i-1)+K₃ (6)

In formula (6), K₃for constant, span is 0-2100.

The feature of refrigerator method for controlling frequency conversion of the present invention is also:

The running speed S of described compressor_iafter every N start-stop cycle, upgrade, the span of N is 2-10 time.

Described running speed S_iif be more than or equal to the compressor maximum speed of regulation, compressor moves with maximum speed, if running speed S_ithe compressor minimum speed that is less than or equal to regulation, compressor moves with minimum speed.

Described target Homes Using TV η₀for the desirable Homes Using TV of refrigerator, span is 40%-100%.

Described adjustment COEFFICIENT K_iif meet | K_i-1|≤a, K_ithe span of=1, a is 0-0.2.

The starting point temperature T of described chamber₁span be 1-15 ℃.

The span of described t1 minute is 20-360 minute.

The feature of a kind of refrigerator of the present invention is: described refrigerator adopts the refrigerator method for controlling frequency conversion described in above arbitrary feature.

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

The present invention is by being updated periodically the running speed of compressor; thereby can change the refrigerating capacity of adjusting timely and effectively compressor according to refrigerator actual load; load increases compressor frequency and increases; load reduction compressor frequency reduces; make refrigerator all the time in comparatively desirable state operation; and can effectively reduce compressor on-off energy loss, reduce the temperature inside the box fluctuation, reach the object that noise is low, energy consumption is little.

Accompanying drawing explanation

Fig. 1 is control flow chart of the present invention;

Fig. 2 is frequency-changeable compressor power changing trend diagram of the present invention.

The specific embodiment

In the present embodiment, as shown in Figure 1, a kind of refrigerator method for controlling frequency conversion, carries out as follows:

Step 1: set refrigerator target Homes Using TV η₀, target Homes Using TV η₀for the desirable Homes Using TV of refrigerator, span is 40%-100%; Refrigerator powers on first, and compressor moves with maximum speed;

Step 2: in the time of the inferior shutdown of compressor operating to the (N+1), through type (1) obtains the refrigerator average Homes Using TV η in a front N continuous start-stop cycle_i:

η_i=compressor accumulated running time/total time (1)

Step 3: the average Homes Using TV η in a front N continuous start-stop cycle_iwith target Homes Using TV η₀compare, through type (2) obtains adjusts COEFFICIENT K_i:

K_i=η_i/η₀ (2)

Step 4: through type (3) obtains the running speed S of compressor while start next time_i:

S_i=K_i×S_(i-1) (3)

If arbitrary compartment temperature is higher than the starting point temperature T of this chamber in refrigerator₁℃ time, the temperature difference between compartment temperature and starting point temperature is Δ T₁, through type (4) upgrades running speed S_i, and by this rotating speed operation (N+1) individual all after date, recalculate average Homes Using TV η by formula (1) and formula (2)_iwith adjustment COEFFICIENT K_i, the running speed S of compressor while start next time to obtain_i; Otherwise do not upgrade compressor rotary speed;

S_i=S_(i-1)+K₁×ΔT₁ (4)

In formula (4), K₁for constant, span is 0-1500; Between the starting point temperature T of chamber₁span be 1-15 ℃.

If the temperature difference that the temperature that interior arbitrary the chamber of refrigerator sets is lowered is Δ T₂, the temperature that certain chamber sets was Ta before lowering, and after lowering, was Tb, Δ T₂=Ta-Tb, through type (5) upgrades running speed S_i, and by this rotating speed operation (N+1) individual all after date, recalculate average Homes Using TV η by formula (1) and formula (2)_iwith adjustment COEFFICIENT K_i, the running speed S of compressor while start next time to obtain_i; Otherwise do not upgrade compressor rotary speed;

S_i=S_(i-1)+K₂×ΔT₂ (5)

In formula (5), K₂for constant, span is 0-1500;

If compressor continuous operating time is more than or equal to t1 minute, through type (6) upgrades running speed S_i, and by this rotating speed operation (N+1) individual all after date, recalculate average Homes Using TV η by formula (1) and formula (2)_iwith adjustment COEFFICIENT K_i, the running speed S of compressor while start next time to obtain_i; Otherwise do not upgrade compressor rotary speed;

S_i=S_(i-1)+K₃ (6)

In formula (6), K₃for constant, span is 0-2100; The span of t1 minute is 20-360 minute.

The running speed S of compressor_iafter every N start-stop cycle, upgrade, the span of N is 2-10 time.Adjust COEFFICIENT K_iif meet | K_i-1|≤a, compressor rotary speed can not upgrade, i.e. K_ithe span of=1, a is 0-0.2.

Running speed S_iif be more than or equal to the compressor maximum speed of regulation, compressor moves with maximum speed, if running speed S_ithe compressor minimum speed that is less than or equal to regulation, compressor moves with minimum speed.

Adopt a refrigerator for above refrigerator method for controlling frequency conversion, as shown in Figure 2, can reach the object of energy saving: refrigerator powers on first in running, compressor moves with maximum speed, and in every N start-stop cycle, compressor upgrades rotating speed.As time goes on, casing load reduces, and now compressor rotary speed reduces, refrigerator power reduction, and in the time that compartment temperature trend is stablized, compressor is with the high operation ratio stable operation of the slow-speed of revolution.

Claims (8)

1. a refrigerator method for controlling frequency conversion, is characterized in that carrying out as follows:

Step 1: target setting Homes Using TV η₀, refrigerator powers on first, and compressor moves with maximum speed;

Step 2: in the time of the inferior shutdown of compressor operating to the (N+1), through type (1) obtains the refrigerator average Homes Using TV η in a front N continuous start-stop cycle_i:

η_i=compressor accumulated running time/total time (1)

Step 3: through type (2) obtains adjusts COEFFICIENT K_i:

K_i=η_i/η₀ (2)

Step 4: through type (3) obtains the running speed S of compressor while start next time_i:

S_i=K_i×S_(i-1) (3)

If arbitrary compartment temperature is higher than the starting point temperature T of chamber between described in refrigerator₁℃ time, the temperature difference between described compartment temperature and described starting point temperature is Δ T₁, through type (4) upgrades described running speed S_i, and operation (N+1) individual all after dates, recalculate average Homes Using TV η by formula (1) and formula (2)_iwith adjustment COEFFICIENT K_i, the running speed S of compressor while start next time to obtain_i;

S_i=S_(i-1)+K₁×ΔT₁ (4)

In formula (4), K₁for constant, span is 0-1500;

If the temperature difference that the temperature that interior arbitrary the chamber of refrigerator sets is lowered is Δ T₂, through type (5) upgrades described running speed S_i, and operation (N+1) individual all after dates, recalculate average Homes Using TV η by formula (1) and formula (2)_iwith adjustment COEFFICIENT K_i, the running speed S of compressor while start next time to obtain_i;

S_i=S_(i-1)+K₂×ΔT₂ (5)

In formula (5), K₂for constant, span is 0-1500;

If compressor continuous operating time is more than or equal to t1 minute, through type (6) upgrades described running speed S_i, and operation (N+1) individual all after dates, recalculate average Homes Using TV η by formula (1) and formula (2)_iwith adjustment COEFFICIENT K_i, the running speed S of compressor while start next time to obtain_i;

S_i=S_(i-1)+K₃ (6)

In formula (6), K₃for constant, span is 0-2100.

2. refrigerator method for controlling frequency conversion according to claim 1, is characterized in that: the running speed S of described compressor_iafter every N start-stop cycle, upgrade, the span of N is 2-10 time.

3. refrigerator method for controlling frequency conversion according to claim 1, is characterized in that: described running speed S_iif be more than or equal to the compressor maximum speed of regulation, compressor moves with maximum speed, if running speed S_ithe compressor minimum speed that is less than or equal to regulation, compressor moves with minimum speed.

4. refrigerator method for controlling frequency conversion according to claim 1, is characterized in that: described target Homes Using TV η₀for the desirable Homes Using TV of refrigerator, span is 40%-100%.

5. refrigerator method for controlling frequency conversion according to claim 1, is characterized in that: described adjustment COEFFICIENT K_iif meet | K_i-1|≤a, K_ithe span of=1, a is 0-0.2.

6. refrigerator method for controlling frequency conversion according to claim 1, is characterized in that: the starting point temperature T of chamber between described₁span be 1-15 ℃.

7. refrigerator method for controlling frequency conversion according to claim 1, is characterized in that: the span of described t1 minute is 20-360 minute.

8. a refrigerator, is characterized in that: described refrigerator adopts the refrigerator method for controlling frequency conversion described in arbitrary claim in claim 1-7.

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