CN102997609A - Frequency converting control method for refrigerator - Google Patents
Frequency converting control method for refrigerator Download PDFInfo
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- CN102997609A CN102997609A CN2012105853552A CN201210585355A CN102997609A CN 102997609 A CN102997609 A CN 102997609A CN 2012105853552 A CN2012105853552 A CN 2012105853552A CN 201210585355 A CN201210585355 A CN 201210585355A CN 102997609 A CN102997609 A CN 102997609A
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Abstract
The invention provides a frequency converting control method for a refrigerator. The method includes that (1) whether the refrigerator meets a refrigeration condition or not is determined after defrosting of the refrigerator is finished; (2) if the refrigerator meets the refrigeration condition, an environment temperature and a setting temperature are detected, and a preset revolution meter is inquired so as to control the operation of a compressor at a corresponding maximum revolution speed until the refrigeration is completed; (3) when the refrigerator meets the refrigeration condition again, the operation of the compressor is controlled at a corresponding minimum revolution speed; (4) whether the compartment temperature of the refrigerator decreases to a preset temperature or not after preset time is determined; (5) if the compartment temperature of the refrigerator does not decrease to the preset temperature, the revolving speed of the compressor is increased by one level, and the step (4) is returned; and (6) if the compartment temperature of the refrigerator decreases to the preset temperature, the compressor is controlled to continue operating until the refrigeration is finished. According to the frequency converting control method for the refrigerator, the revolving speed of the compressor is continuously adjusted according to the environment temperature, interior temperatures of compartments and the like, so that the frequency conversion is achieved, the cooling speed of the refrigerator is improved, waste of cooling capacity of the compressor is reduced, and the energy consumption is lowered.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, particularly a kind of method for controlling frequency conversion of refrigerator.
Background technology
In present refrigerator VFC field, following three kinds of control methods are mainly taked in the control of the compressor variable frequency of refrigerator: (1) is according to environment temperature control freezer compressor rotating speed.General each refrigerator is settled an environment temperature sensor, and when environment temperature was high, rotating speed was just high.When environment temperature was low, rotating speed was just low.(2) according to the difference control compressor rotary speed of the temperature of design temperature and refrigerator compartment sensor.The temperature difference is larger, and rotating speed is higher, and the temperature difference is less, and rotating speed is lower.(3) adjust compressor rotary speed by the switch refrigerator doors.Open the door once, revolution rises 1 grade.There are three shortcomings in the prior art scheme: (1) these three kinds of compressor rotary speed control methods are all more single, can't adjust compressor rotary speed according to the needs that reality is used, and really do not embody the effect of frequency-changeable compressor " frequency conversion ".(2) these three kinds of control law rotating ratios are more fixing, can not well control frequency-changeable compressor and carry out frequency conversion, cause when design temperature and the refrigerator actual temperature temperature difference are larger, and compressor rotary speed is lower, food cooling speed is slow; In design temperature and the refrigerator actual temperature temperature difference hour, compressor rotary speed is higher, refrigerator actual power consumption amount is larger.Therefore can not give play to frequency-changeable compressor reaches energy-saving and cost-reducing and fast-refrigerating by frequency conversion effect.(3) switch gate can only reflect the refrigerator switch gate indirectly on the impact of refrigeration requirement, can not reflect definitely that the actual temperature of refrigerator changes.
Summary of the invention
The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or provides at least a kind of useful commerce to select.
For this reason, one object of the present invention is to propose a kind of method for controlling frequency conversion of refrigerator, and the method is according to environment temperature and an indoor lasting adjustment compressor rotary speed such as temperature, realize frequency conversion, improve the cooling velocity of refrigerator, reduced the waste of compressor cold, reduce energy consumption.
To achieve these goals, embodiments of the invention provide a kind of method for controlling frequency conversion of refrigerator to comprise: A: after the refrigerator defrost finishes, judge whether refrigerator satisfies the refrigeration condition; B: if satisfy the refrigeration condition, then testing environment temperature and design temperature, and according to described environment temperature and described design temperature inquiry preset rotation speed table with by maximum speed control compressor operating corresponding under described environment temperature and the described design temperature until refrigeration finish; C: when described refrigerator satisfies the refrigeration condition again, inquire about the preset rotation speed table to control described compressor operating by minimum speed corresponding under described environment temperature and the described design temperature according to current environment temperature and described design temperature; D: whether the compartment temperature of judging described refrigerator after Preset Time drops to preset temperature; E: if do not drop to described preset temperature, the rotating speed of then controlling described compressor promotes the one-level rotating speed, and returns step D; F: if drop to described preset temperature, then control compressor and continue to move until refrigeration is finished.
Method for controlling frequency conversion according to the refrigerator of the embodiment of the invention, the method in use can allow frequency-changeable compressor according to actual needs (environment temperature and an indoor temperature etc.) continue to adjust compressor rotary speed, realize frequency conversion, improve the cooling velocity of refrigerator, the characteristics of the highly effective refrigeration of frequency-changeable compressor have been given play to fully, reduce the waste of compressor cold, reached energy-saving and cost-reducing purpose.
In one embodiment of the invention, before described step C, also comprise: judge whether to satisfy the defrost condition; If satisfy the defrost condition, then described refrigerator is carried out defrost.
In one embodiment of the invention, described preset rotation speed table comprises a plurality of the first rotating speed set and the set of a plurality of the second rotating speed, include the multistage rotating speed that rotating speed does not wait in each the first rotating speed set and the set of each the second rotating speed, and each the first rotating speed set and the respectively corresponding temperature range of each the second rotating speed set.
In one embodiment of the invention, the minimum speed during interval the first corresponding rotating speed of same temperature is gathered is lower than the minimum speed in the set of the second rotating speed.
In one embodiment of the invention, described Preset Time comprises the first to the 3rd Preset Time, and described chamber comprises refrigerating chamber and refrigerating chamber.
In one embodiment of the invention, described step D further comprises:
Judge after the first Preset Time whether temperature of refrigerating chamber drops to the first preset temperature;
Judge after the second Preset Time whether freezer temperature is lower than the second preset temperature and is higher than the 3rd preset temperature;
Judge after the 3rd Preset Time whether freezer temperature drops to the 3rd preset temperature;
Do not drop to the first preset temperature if after the first Preset Time, judge temperature of refrigerating chamber, judge after the second Preset Time that perhaps freezer temperature does not drop to the second preset temperature, judge after the 3rd Preset Time that perhaps freezer temperature does not drop to the 3rd preset temperature, execution in step E then, otherwise execution in step F.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the flow chart of the method for controlling frequency conversion of refrigerator according to an embodiment of the invention;
Fig. 2 is the flow chart of the method for controlling frequency conversion of refrigerator in accordance with another embodiment of the present invention; And
The control flow chart of the method for controlling frequency conversion of the refrigerator of Fig. 3 another embodiment according to the present invention.
The specific embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein identical or similar label represents identical or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.On the contrary, embodiments of the invention comprise spirit and interior all changes, modification and the equivalent of intension scope that falls into additional claims.
In description of the invention, it will be appreciated that term " first ", " second " etc. only are used for describing purpose, and can not be interpreted as indication or hint relative importance.In description of the invention, need to prove that unless clear and definite regulation and restriction are arranged in addition, term " links to each other ", " connection " should do broad understanding, for example, can be to be fixedly connected with, and also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can indirectly link to each other by intermediary.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.In addition, in description of the invention, except as otherwise noted, the implication of " a plurality of " is two or more.
Fig. 1 is the flow chart of the method for controlling frequency conversion of refrigerator according to an embodiment of the invention.As shown in Figure 1, the method may further comprise the steps:
Step S101: after the refrigerator defrost finishes, judge whether refrigerator satisfies the refrigeration condition.Refrigerator is in defrost process, and compressor stops operating, and this moment, refrigerating chamber and the temperature in the refrigerating chamber of refrigerator rose.Therefore, after defrost finishes, judge whether refrigerator satisfies the refrigeration condition, namely judge refrigerator between the temperature of chamber whether reach the starting point temperature, after reaching, the judgement refrigerator satisfies the refrigeration condition.
Step S102: if satisfy the refrigeration condition, then testing environment temperature and design temperature, and according to environment temperature and design temperature inquiry preset rotation speed table with by maximum speed control compressor operating corresponding under environment temperature and the design temperature until refrigeration finish.The preset rotation speed table comprises a plurality of the first rotating speed set and the set of a plurality of the second rotating speed, include the multistage rotating speed that rotating speed does not wait in each the first rotating speed set and the set of each the second rotating speed, and each the first rotating speed set and the respectively corresponding temperature range of each the second rotating speed set.Minimum speed during interval the first corresponding rotating speed of same temperature is gathered is lower than the minimum speed in the set of the second rotating speed.Consult shown in the table 1, environment temperature is divided into a plurality of temperature ranges, and the corresponding initial minimum speed that is higher than the initial minimum speed of design temperature and is lower than design temperature of each temperature range.
As a concrete example, as shown in table 1, show the preset rotation speed table of one embodiment of the invention, in this embodiment, to set a plurality of compressor rotary speed gears and control, the even or inhomogeneous gear in interval is 10.Compressor stipulate some gears be Rmin, Rmin+1, Rmin+2 ... Rmax.Wherein, Th is environment temperature, and T is a default temperature value.Consult shown in the table 1, for example when T is-20 ℃, during in environment temperature Th≤10 ℃, if require the drop in temperature of freezer compartment of refrigerator to be-17 ℃, this temperature is higher than T, and the minimum speed of corresponding compressor is Rmin so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+10, this moment, the rotating speed of compressor was controlled compressor operating until refrigeration is finished with the maximum speed Rmin+10 under this testing environment temperature.If require the drop in temperature of freezer compartment of refrigerator to be-22 ℃, this temperature is lower than T, the minimum speed of corresponding compressor is Rmin+1 so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+11, then the rotating speed of compressor is controlled compressor operating until refrigeration is finished with the maximum speed Rmin+11 that detects under this environment temperature at this moment.In like manner, design temperature still is-20 ℃.When environment temperature Th becomes 10 ℃＜Th≤21 ℃, if require the drop in temperature of freezer compartment of refrigerator to be-17 ℃, this temperature is higher than T, so as shown in table 1, the minimum speed of the compressor that this moment is corresponding is Rmin+1, because 10 grades of intervals of the rotating speed of compressor, so corresponding maximum speed is Rmin+11 under this temperature, this moment, the rotating speed of compressor was controlled compressor operating until refrigeration is finished with the maximum speed Rmin+11 under this testing environment temperature.If require the drop in temperature of freezer compartment of refrigerator to be-22 ℃, this temperature is lower than T, the minimum speed of corresponding compressor is Rmin+2 so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+12, then the rotating speed of compressor is controlled compressor operating until refrigeration is finished with the maximum speed Rmin+12 that detects under this environment temperature at this moment.The like.
Table 1
In example of the present invention, after the refrigerator defrost finished, when freezing first, then can table look-up moved to the refrigeration end with maximum speed corresponding under the current environmental temperature, after namely compartment temperature drops to the Burnout temperature, stops refrigeration.
Step S103: when refrigerator satisfies the refrigeration condition again, inquire about the preset rotation speed table to control compressor operating by minimum speed corresponding under environment temperature and the design temperature according to current environment temperature and design temperature.Namely work as refrigerator and again satisfy after the refrigeration condition, the compressor of refrigerator brings into operation according to minimum speed corresponding under the current environment.Concrete, when refrigerator satisfies the refrigeration condition again, at first judge environment temperature Th, consult shown in the table 1, for example this moment, environment temperature Th became 23 ℃, this moment 21 ℃＜Th≤28 ℃, T still is-20 ℃.If require the drop in temperature of freezer compartment of refrigerator to be-17 ℃, this temperature is higher than T, the minimum speed of corresponding compressor is Rmin+2 so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+12, this moment, the rotating speed of compressor was controlled compressor operating until refrigeration is finished with the minimum speed Rmin+2 under this testing environment temperature.If require the drop in temperature of freezer compartment of refrigerator to be-22 ℃, this temperature is lower than T, the minimum speed of corresponding compressor is Rmin+3 so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+13, then the rotating speed of compressor is controlled compressor operating until refrigeration is finished with the minimum speed Rmin+3 that detects under this environment temperature at this moment.
Step S104: whether the compartment temperature of judging refrigerator after Preset Time drops to preset temperature.As a concrete example, take the refrigerator that comprises refrigerating chamber and refrigerating chamber as example, then Preset Time comprises the first Preset Time to the three Preset Times, and the chamber comprises refrigerating chamber and refrigerating chamber between refrigerator.Its determining step is as follows:
Judge after the first Preset Time whether temperature of refrigerating chamber drops to the first preset temperature; the first preset temperature is the starting point temperature of refrigerating chamber and the medium temperature of break point temperature; it is 6 ℃ such as refrigerating chamber starting point temperature; the break point temperature is 2 ℃; then the first preset temperature is 4 ℃; the first Preset Time preseted according to demand, such as 3 minutes.
Judge after the second Preset Time whether freezer temperature is lower than the second preset temperature and is higher than the 3rd preset temperature.The second preset temperature is refrigerating chamber starting point temperature; the 3rd preset temperature is the medium temperature of refrigerating chamber starting point temperature and refrigerating chamber break point temperature, and for example, refrigerating chamber starting point temperature is-10 degrees centigrade; refrigerating chamber break point temperature is-20 degrees centigrade, and then the refrigerating chamber medium temperature is-15 ℃.The second Preset Time for example is 4 minutes.
Judge after the 3rd Preset Time whether freezer temperature drops to the 3rd preset temperature.The 3rd Preset Time for example is 5 minutes.
Do not drop to the first preset temperature if after the first Preset Time, judge temperature of refrigerating chamber, judge after the second Preset Time that perhaps freezer temperature does not drop to the second preset temperature, judge after the 3rd Preset Time that perhaps freezer temperature does not drop to the 3rd preset temperature, execution in step S105 then, otherwise execution in step S106.
Step S105: if do not drop to preset temperature, the rotating speed of then controlling compressor promotes the one-level rotating speed, and returns step S104.In one embodiment of the invention, if refrigerator temperature does not drop to preset temperature all the time, compressor operation is accumulated to certain hour, compressor forced stoppage then, and compressor is in halted state, and the refrigerating evaporator refrigerator forces to enter the defrost state.For example, as described in step S103, compressor is under 9 ℃ of conditions at environment temperature Th, if compressor starts with rotating speed Rmin, to consult shown in the table 1, this moment, refrigerator compartment did not drop to preset temperature through its temperature behind the Preset Time, compressor is not accumulated yet and is run to certain hour and force to enter the defrost state, the rotating speed of then controlling compressor promotes the one-level rotating speed, namely uses rotating speed Rmin+1, and returns step S104.
Step S106: if drop to preset temperature, then control compressor and continue to move until refrigeration is finished.
In an embodiment of the present invention, the method in use can allow frequency-changeable compressor continue according to actual needs to adjust compressor rotary speed, can follow the actual demand according to food in the refrigerator, reasonably regulate the rotating speed of compressor, when the refrigerator actual temperature is higher, compressor has improved the cooling velocity of refrigerator to run up, and has given play to fully the characteristics of the highly effective refrigeration of frequency-changeable compressor; When the refrigerator actual temperature reduces, can reduce compressor rotary speed in good time, thereby reduce the waste of compressor cold, reach energy-saving and cost-reducing purpose.Continue to follow the tracks of simultaneously the variations in temperature of refrigerator compartment inside by the temperature inside the box, and adjust compressor rotary speed with this, to better meet actual use needs.By a plurality of reference quantity Comprehensive Control compressor rotary speeds such as environment temperature, preset temperature, refrigerator inside actual temperature and compressor stream times, namely adjust compressor rotary speed and continue by the temperature difference of preset temperature and refrigerator inside actual temperature compressor rotary speed is adjusted correction simultaneously.The compressor rotary speed refrigeration of embodiments of the invention to be fit to keep compartment temperature relatively stable, reaches energy-conservation purpose simultaneously.
Method for controlling frequency conversion according to the refrigerator of the embodiment of the invention, the method in use can allow frequency-changeable compressor according to actual needs (environment temperature and an indoor temperature etc.) continue to adjust compressor rotary speed, realize frequency conversion, improve the cooling velocity of refrigerator, the characteristics of the highly effective refrigeration of frequency-changeable compressor have been given play to fully, reduce the waste of compressor cold, reached energy-saving and cost-reducing purpose.
As shown in Figure 2, be the flow chart according to the method for controlling frequency conversion of the another kind of refrigerator of the embodiment of the invention, the method comprises the steps:
Step S201 after the refrigerator defrost finishes, judges whether refrigerator satisfies the refrigeration condition.Refrigerator is in defrost process, and compressor stops operating, and this moment, refrigerating chamber and the temperature in the refrigerating chamber of refrigerator rose.Therefore, after defrost finishes, judge whether refrigerator satisfies the refrigeration condition, namely judge refrigerator between the temperature of chamber whether reach the starting point temperature, after reaching, the judgement refrigerator satisfies the refrigeration condition.
Step S202, if satisfy the refrigeration condition, then testing environment temperature and design temperature, and according to environment temperature and design temperature inquiry preset rotation speed table with by maximum speed control compressor operating corresponding under environment temperature and the design temperature until refrigeration finish.
The preset rotation speed table comprises a plurality of the first rotating speed set and the set of a plurality of the second rotating speed, include the multistage rotating speed that rotating speed does not wait in each the first rotating speed set and the set of each the second rotating speed, and each the first rotating speed set and the respectively corresponding temperature range of each the second rotating speed set.Minimum speed during interval the first corresponding rotating speed of same temperature is gathered is lower than the minimum speed in the set of the second rotating speed.Consult shown in the table 1, environment temperature is divided into a plurality of temperature ranges, and the corresponding initial minimum speed that is higher than the initial minimum speed of design temperature and is lower than design temperature of each temperature range.
As a concrete example, as shown in table 1, in embodiments of the present invention, to set a plurality of compressor rotary speed gears and control, the even or inhomogeneous gear in interval is 10.Compressor stipulate some gears be Rmin, Rmin+1, Rmin+2 ... Rmax.Wherein, Th is environment temperature, and T is a default temperature value.Consult shown in the table 1, for example when T is-20 ℃, during in environment temperature Th≤10 ℃, if require the drop in temperature of freezer compartment of refrigerator to be-17 ℃, this temperature is higher than T, and the minimum speed of corresponding compressor is Rmin so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+10, this moment, the rotating speed of compressor was controlled compressor operating until refrigeration is finished with the maximum speed Rmin+10 under this testing environment temperature.If require the drop in temperature of freezer compartment of refrigerator to be-22 ℃, this temperature is lower than T, the minimum speed of corresponding compressor is Rmin+1 so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+11, then the rotating speed of compressor is controlled compressor operating until refrigeration is finished with the maximum speed Rmin+11 that detects under this environment temperature at this moment.In like manner, design temperature still is-20 ℃.When environment temperature Th becomes 10 ℃＜Th≤21 ℃, if require the drop in temperature of freezer compartment of refrigerator to be-17 ℃, this temperature is higher than T, so as shown in table 1, the minimum speed of the compressor that this moment is corresponding is Rmin+1, because 10 grades of intervals of the rotating speed of compressor, so corresponding maximum speed is Rmin+11 under this temperature, this moment, the rotating speed of compressor was controlled compressor operating until refrigeration is finished with the maximum speed Rmin+11 under this testing environment temperature.If require the drop in temperature of freezer compartment of refrigerator to be-22 ℃, this temperature is lower than T, the minimum speed of corresponding compressor is Rmin+2 so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+12, then the rotating speed of compressor is controlled compressor operating until refrigeration is finished with the maximum speed Rmin+12 that detects under this environment temperature at this moment.The like, give unnecessary details no longer one by one at this.
In example of the present invention, after the refrigerator defrost finished, when freezing first, then can table look-up moved to the refrigeration end with maximum speed corresponding under the current environmental temperature, after namely compartment temperature drops to the Burnout temperature, stops refrigeration.
Step S203: judge whether to satisfy the defrost condition.
Step S204: if satisfy the defrost condition, then refrigerator is carried out defrost.
After satisfying the defrost condition, the control refrigerator carries out defrost, re-executes step S101 to the step of step S106 after defrost finishes.
Consult shown in Figure 3ly, be the control flow chart according to the method for controlling frequency conversion of a kind of refrigerator of the embodiment of the invention.
Step S301: the refrigerating evaporator defrost finishes.The compressor of refrigerator only when defrost finishes, just can freeze.Do not finish if judge defrost, then continue execution in step S301.Finish if judge defrost, then execution in step S302.
Step S302: compressor brings into operation with maximum speed RTmax corresponding under the current environmental temperature.When the refrigerating evaporator defrost finishes, at first judge environment temperature, compressor brings into operation with maximum speed RTmax corresponding under the current environmental temperature.As a concrete example, as shown in table 1, in embodiments of the present invention, to set a plurality of compressor rotary speed gears and control, the even or inhomogeneous gear in interval is 10.Compressor stipulate some gears be Rmin, Rmin+1, Rmin+2 ... Rmax.Wherein, Th is environment temperature, and T is a default temperature value.Consult shown in the table 1, for example when T is-20 ℃, during in environment temperature Th≤10 ℃, if require the drop in temperature of freezer compartment of refrigerator to be-17 ℃, this temperature is higher than T, and the minimum speed of corresponding compressor is Rmin so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+10, this moment, the rotating speed of compressor was controlled compressor operating until refrigeration is finished with the maximum speed Rmin+10 under this testing environment temperature.If require the drop in temperature of freezer compartment of refrigerator to be-22 ℃, this temperature is lower than T, the minimum speed of corresponding compressor is Rmin+1 so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+11, then the rotating speed of compressor is controlled compressor operating until refrigeration is finished with the maximum speed Rmin+11 that detects under this environment temperature at this moment.In like manner, design temperature still is-20 ℃.When environment temperature Th becomes 10 ℃＜Th≤21 ℃, if require the drop in temperature of freezer compartment of refrigerator to be-17 ℃, this temperature is higher than T, so as shown in table 1, the minimum speed of the compressor that this moment is corresponding is Rmin+1, because 10 grades of intervals of the rotating speed of compressor, so corresponding maximum speed is Rmin+11 under this temperature, this moment, the rotating speed of compressor was controlled compressor operating until refrigeration is finished with the maximum speed Rmin+11 under this testing environment temperature.If require the drop in temperature of freezer compartment of refrigerator to be-22 ℃, this temperature is lower than T, the minimum speed of corresponding compressor is Rmin+2 so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+12, then the rotating speed of compressor is controlled compressor operating until refrigeration is finished with the maximum speed Rmin+12 that detects under this environment temperature at this moment.The like, give unnecessary details no longer one by one at this.
Step S303: when compressor moves to refrigeration and finishes with maximum speed Rmax corresponding under this moment environment temperature, compressor shutdown.The refrigerating chamber of refrigerator and the temperature of refrigerating chamber all begin rising at this moment.If refrigerator temperature does not drop to preset temperature all the time, compressor operation is accumulated to certain hour, compressor forced stoppage then, and compressor is in halted state, and refrigerating evaporator forces to enter the defrost state.
Step S304: if do not satisfy the condition of defrost, then compressor is in halted state always.This moment, refrigerating chamber and the interior temperature of refrigerating chamber of refrigerator all rose, when rising to the uniform temperature condition, the compressor of refrigerator is according to minimum speed control compressor operating corresponding under the current environment temperature, and namely the compressor of refrigerator brings into operation according to the minimum speed under the current environment.Concrete, when refrigerator satisfies the refrigeration condition again, at first judge environment temperature Th, consult shown in the table 1, for example this moment, environment temperature Th became 23 ℃, this moment 21 ℃＜Th≤28 ℃, T still is-20 ℃.If require the drop in temperature of freezer compartment of refrigerator to be-17 ℃, this temperature is higher than T, the minimum speed of corresponding compressor is Rmin+2 so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+12, this moment, the rotating speed of compressor was controlled compressor operating until refrigeration is finished with the minimum speed Rmin+2 under this testing environment temperature.If require the drop in temperature of freezer compartment of refrigerator to be-22 ℃, this temperature is lower than T, the minimum speed of corresponding compressor is Rmin+3 so at this moment, because 10 grades of intervals of the rotating speed of compressor, so maximum speed corresponding under this temperature is Rmin+13, then the rotating speed of compressor is controlled compressor operating until refrigeration is finished with the minimum speed Rmin+3 that detects under this environment temperature at this moment.
Step S305: whether the compartment temperature of judging refrigerator after Preset Time drops to preset temperature.Preset Time comprises the first preset time t 1, the second preset time t 2 and the 3rd preset time t 3, and the first to the 3rd Preset Time corresponds respectively to refrigerating chamber and the refrigerating chamber of refrigerator.Its determining step is as follows:
Judge after the first preset time t 1 whether temperature of refrigerating chamber Tr drops to the first preset temperature Tm;
Judge after the second preset time t 2 whether freezer temperature Tf is lower than the second preset temperature Tfq and is higher than the 3rd preset temperature Tfm;
Judge after the 3rd preset time t 3 whether freezer temperature Tf drops to the 3rd preset temperature Tfm;
Do not drop to the first preset temperature Tm if after the first preset time t 1, judge temperature of refrigerating chamber Tr, judge after the second preset time t 2 that perhaps freezer temperature Tf does not drop to the second preset temperature Tfq, judge after the 3rd preset time t 3 that perhaps freezer temperature Tf does not drop to the 3rd preset temperature Tfm, execution in step S306 then, otherwise execution in step S307.
Step S306: if do not drop to preset temperature, the rotating speed of then controlling compressor promotes the one-level rotating speed, and returns step S305.If refrigerator temperature does not drop to preset temperature all the time, compressor operation is accumulated to certain hour, compressor forced stoppage then, and compressor is in halted state, and refrigerator enters the defrost state of forcing.Do not enter the Cumulative Elapsed Time of forcing the defrost state if compressor has to arrive, the rotating speed of then controlling compressor promotes the one-level rotating speed.For example, as described in step S304, if compressor is to start with rotating speed Rmin+2 under 23 ℃ of conditions at environment temperature Th, consult shown in the table 1, this moment, the temperature of refrigerator compartment did not drop to preset temperature, and compressor is not accumulated yet and run to certain hour and force to enter the defrost state, and the rotating speed of then controlling compressor promotes the one-level rotating speed, namely use rotating speed Rmin+3, and return step S305.If compressor is to start with rotating speed Rmin+3 under 23 ℃ of conditions at environment temperature Th, consult shown in the table 1, this moment, the temperature of refrigerator compartment did not drop to preset temperature, compressor is not accumulated yet and is run to certain hour and force to enter the defrost state, the rotating speed of then controlling compressor promotes the one-level rotating speed, namely use rotating speed Rmin+4, and return step S305.
Step S307: if drop to preset temperature, it is out of service then to control compressor.This moment, compressor was in halted state, and the temperature in the refrigerating chamber of refrigerator and the refrigerating chamber is in propradation always, judges that whether refrigerator satisfies the refrigeration condition, circulates next time.
Method for controlling frequency conversion according to the refrigerator of the embodiment of the invention, the method in use can allow frequency-changeable compressor according to actual needs (environment temperature and an indoor temperature etc.) continue to adjust compressor rotary speed, realize frequency conversion, improve the cooling velocity of refrigerator, the characteristics of the highly effective refrigeration of frequency-changeable compressor have been given play to fully, reduce the waste of compressor cold, reached energy-saving and cost-reducing purpose.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiment in the situation that does not break away from principle of the present invention and aim, scope of the present invention is limited by claim and equivalent thereof.
Claims (6)
1. the method for controlling frequency conversion of a refrigerator is characterized in that, may further comprise the steps:
A: after the refrigerator defrost finishes, judge whether refrigerator satisfies the refrigeration condition;
B: if satisfy the refrigeration condition, then testing environment temperature and design temperature, and according to described environment temperature and described design temperature inquiry preset rotation speed table with by maximum speed control compressor operating corresponding under described environment temperature and the described design temperature until refrigeration finish;
C: when described refrigerator satisfies the refrigeration condition again, inquire about the preset rotation speed table to control described compressor operating by minimum speed corresponding under described environment temperature and the described design temperature according to current environment temperature and described design temperature;
D: whether the compartment temperature of judging described refrigerator after Preset Time drops to preset temperature;
E: if do not drop to described preset temperature, the rotating speed of then controlling described compressor promotes the one-level rotating speed, and returns step D;
F: if drop to described preset temperature, then control compressor and continue to move until refrigeration is finished.
2. control method according to claim 1 is characterized in that, also comprises before described step C:
Judge whether to satisfy the defrost condition;
If satisfy the defrost condition, then described refrigerator is carried out defrost.
3. control method according to claim 1, it is characterized in that, described preset rotation speed table comprises a plurality of the first rotating speed set and the set of a plurality of the second rotating speed, include the multistage rotating speed that rotating speed does not wait in each the first rotating speed set and the set of each the second rotating speed, and each the first rotating speed set and the respectively corresponding temperature range of each the second rotating speed set.
4. control method according to claim 3 is characterized in that, the minimum speed during interval the first corresponding rotating speed of same temperature is gathered is lower than the minimum speed in the set of the second rotating speed.
5. control method according to claim 1, described Preset Time comprises the first to the 3rd Preset Time, described chamber comprises refrigerating chamber and refrigerating chamber.
6. control method according to claim 5 is characterized in that, described step D further comprises:
Judge after the first Preset Time whether described temperature of refrigerating chamber drops to the first preset temperature;
Judge after the second Preset Time whether described freezer temperature is lower than the second preset temperature and is higher than the 3rd preset temperature;
Judge after the 3rd Preset Time whether described freezer temperature drops to the 3rd preset temperature;
If judge that after the first Preset Time described temperature of refrigerating chamber does not drop to the first preset temperature, judge after the second Preset Time that perhaps described freezer temperature does not drop to the second preset temperature, judge after the 3rd Preset Time that perhaps described freezer temperature does not drop to the 3rd preset temperature, execution in step E then, otherwise execution in step F.
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