CN106403486B - Control method, control device and the refrigerator of frequency conversion refrigerating plant - Google Patents
Control method, control device and the refrigerator of frequency conversion refrigerating plant Download PDFInfo
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- CN106403486B CN106403486B CN201610800932.3A CN201610800932A CN106403486B CN 106403486 B CN106403486 B CN 106403486B CN 201610800932 A CN201610800932 A CN 201610800932A CN 106403486 B CN106403486 B CN 106403486B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/003—Arrangement or mounting of control or safety devices for movable devices
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Abstract
The present invention provides control method, control device and the refrigerator of a kind of frequency conversion refrigerating plant, the control method of frequency conversion refrigerating plant includes: that the carrier frequency of frequency converter is recorded as original frequency in the operation of frequency conversion refrigerating plant；Detect the temperature value T0 of device for power switching in frequency conversion refrigerating plant；The temperature value T0 of device for power switching is compared with preset temperature value T1；According to comparison result, carrier frequency is adjusted.The control method of frequency conversion refrigerating plant provided by the invention adjusts carrier frequency to suitable range by the way that the temperature value T0 of device for power switching to be compared with preset temperature value T1, and using comparison result as foundation.It is possible thereby to reduce the fever of power device, the reliability of frequency converter is improved.Device for power switching is also protected simultaneously, the service life of the frequency conversion refrigerating plant is improved, effectively reduces ineffective energy consumption, energy conservation and environmental protection.
Description
Technical field
The present invention relates to refrigeration technology fields, fill in particular to a kind of control method of frequency conversion refrigerating plant, control
It sets and refrigerator.
Background technique
Nowadays almost there is refrigerator in each family, because of the use characteristic that its whole day does not power off, becomes phase in household electricity
When big component part.To reduce refrigerator power consumption, save electric energy and protect environment, many families selected refrigeration effect more preferable and
The frequency conversion refrigerator being more energy-saving and environmentally friendly.
In frequency conversion control technique, the carrier frequency of frequency converter is opening and turning off for the device for power switching of decision inverter
Number, it influence power module power loss.When carrier frequency is big, current waveform sine is good and smooth, but when dead zone
Between aggregate-value it is bigger, time of frequency converter real work shortens, and causes output power smaller.High power loss can make function
Rate module heating increases, unfavorable to frequency converter, and will increase power consumption.
Fixed carrier frequency is used when current refrigerator works, and when selecting low carrier frequency, will lead to current waveform injustice
Sliding, i.e., sine is poor, so that motor noise in operating is larger and has certain fever.So in actual use, to improve frequency conversion
Overall performance is controlled, higher carrier frequencies can be selected to work.However selection higher carrier frequencies work, it cannot but be well adapted for
All actual conditions easily cause the problems such as component generates heat.
Summary of the invention
At least one in order to solve the above-mentioned technical problem, the embodiment of the first aspect of the present invention proposes a kind of frequency conversion system
The control method of device for cooling.
A kind of the second aspect of the present invention embodiment, it is also proposed that control device of frequency conversion refrigerating plant.
A kind of the third aspect of the present invention embodiment, it is also proposed that refrigerator.
The content of one aspect of the present invention is to reduce the on-off times of switching device in the carrier frequency a cycle time,
Loss and the device temperature of driving are reduced with this.
If carrier frequency is 6KHz, in the case where 4200rpm (70HZ),
1 cycle time=1/70s=14.29ms=14285us,
The on-off times in 1 period=(14285us/166us) * 3 phases=generation 258 times；
If carrier frequency is 5KHz, in the case where 4200rpm (70HZ),
1 cycle time=1/70s=14.29ms=14285us
The on-off times in 1 period=(14285us/200us) * 3 phases=generation 214 times.
It can be seen from the above, the switching frequency of switching device can be reduced by reducing carrier frequency, and then reduce related device
Temperature and loss.
In view of this, according to the embodiment of the first aspect of the invention, the invention proposes a kind of frequency conversion refrigerating plants
Control method, for controlling the carrier frequency of frequency converter in frequency conversion refrigerating plant characterized by comprising step S102 is becoming
The carrier frequency of frequency converter is recorded as original frequency when frequency refrigerating plant is run；Step S104 is detected in frequency conversion refrigerating plant
The temperature value T0 of device for power switching；Step S106 compares the temperature value T0 of device for power switching and preset temperature value T1
Compared with；Step S108 adjusts carrier frequency according to the comparison result of step S106.
The control method of frequency conversion refrigerating plant provided by the invention, by by the temperature value T0 of device for power switching and default
Temperature value T1 is compared, and using comparison result as foundation, adjusts carrier frequency to suitable range.Such as device for power switching
Temperature value T0 when being greater than preset temperature value T1, can suitably reduce operating frequency, and reduce variable load wave frequency rate to a certain degree, by
This can reduce the fever of power device, improve the reliability of frequency converter.Device for power switching is also protected simultaneously, improves this
The service life of frequency conversion refrigerating plant effectively reduces ineffective energy consumption, energy conservation and environmental protection.
In addition, the control method of the frequency conversion refrigerating plant in above-described embodiment provided by the invention can also have it is following attached
Add technical characteristic:
In the above-mentioned technical solutions, it is preferable that when the comparison result of step S106 is that T0 is greater than T1, enter step
S202；Step S202 adjusts carrier frequency to first frequency, and first frequency is less than original frequency, wherein if the original frequency
Minimum frequency is run for system, then the original frequency is maintained to continue to run.
In the technical scheme, it when the temperature value T0 of device for power switching is greater than preset temperature value T1, can suitably reduce
Operating frequency, and variable load wave frequency rate is reduced to a certain degree to first frequency, if original frequency has been the minimum frequency of system operation
Rate then maintains the original frequency to continue to run.Because the frequency of device for power switching opened with turned off is excessively high, number excessively can
Cause temperature excessively high, influence the performance of component, carrier frequency can be reduced when more than certain temperature, reduces power device
Fever, improves the reliability of frequency converter.Device for power switching is also protected simultaneously, improve the frequency conversion refrigerating plant uses the longevity
Life, effectively reduces ineffective energy consumption, energy conservation and environmental protection.
In the above-mentioned technical solutions, it is preferable that when the comparison result of step S106 is that T0 is less than or equal to T1, enter step
S204；Whether step S204, detection frequency conversion refrigerating plant are in power consumption mode；If frequency conversion refrigerating plant is in power consumption mode,
Enter step S206；Step S206 adjusts carrier frequency to second frequency, and second frequency is less than original frequency, wherein if described
Original frequency is that system runs minimum frequency, then the original frequency is maintained to continue to run.
In the technical scheme, if the temperature value T0 of device for power switching is less than or equal to preset temperature value T1, further
Judge whether the frequency conversion refrigerating plant is in power consumption mode, if being in power consumption mode, adjusts carrier frequency to less than initial frequency
The second frequency of rate maintains the original frequency to continue to run if original frequency has been the minimum frequency of system operation.It should
Frequency conversion refrigerating plant, such as frequency conversion refrigerator can reduce carrier frequency in power consumption mode operation to a certain degree, reduce power loss.
Compared with the refrigerator of traditional fixed frequency, the appropriate carrier frequency that reduces enhances the flexibility of working condition, and saves
Energy consumption.
In the above-mentioned technical solutions, it is preferable that if frequency conversion refrigerating plant is not in power consumption mode, enter step S208；
Step S208 maintains original frequency to continue to run.
In the technical scheme, the temperature value T0 of device for power switching is less than preset temperature value T1, and the frequency conversion system
Device for cooling is not in power consumption mode, and the original frequency before can keeping at this time is constant, continues to run.With traditional fixed frequency
Refrigerator compare, by the judgement for temperature and power consumption mode, select suitable carrier frequency, enhancing for frequency conversion refrigerating plant
The flexibility of working condition avoids fixed frequency so that the frequency conversion refrigerating plant can choose suitable carrier frequency operation
The problems such as device for power switching generates heat in the refrigerator of rate reduces power loss, energy conservation and environmental protection.
In any of the above-described technical solution, it is preferable that after adjusting or maintaining carrier frequency, and pass through interval time t1,
Repeating said steps S102 to the step S108.
In the technical scheme, after adjusting the frequency conversion refrigerating plant according to condition, function in frequency conversion refrigerating plant is continued to test
The temperature value of rate switching device, when being again in conformance with the adjusting condition of carrier frequency, again to the carrier wave of the frequency conversion refrigerating plant
Frequency is adjusted.It is suitable for its selection under certain operating condition by the lasting detection for the frequency conversion refrigerating plant operating condition
Carrier frequency, the fever of power device can be reduced in this way, protect device for power switching, improve the reliability of frequency converter,
The service life of the frequency conversion refrigerating plant is improved, ineffective energy consumption, energy conservation and environmental protection are effectively reduced.
Embodiment according to the second aspect of the invention, it is also proposed that a kind of control device of frequency conversion refrigerating plant, for controlling
The carrier frequency of frequency converter in frequency conversion refrigerating plant processed characterized by comprising recording unit, in frequency conversion refrigerating plant
The carrier frequency of frequency converter is recorded as original frequency when operation；Detection unit is opened for detecting power in frequency conversion refrigerating plant
Close the temperature value T0 of device；Comparing unit, for the temperature value T0 of device for power switching to be compared with preset temperature value T1；
Unit is adjusted, for the comparison result according to the temperature value T0 and preset temperature value T1 of device for power switching, adjusting carrier frequency.
The control device of frequency conversion refrigerating plant provided by the invention, comparing unit are opened by will test the power that unit measures
The temperature value T0 for closing device is compared with preset temperature value T1, and using comparison result as foundation, is adjusted unit and is adjusted carrier wave
Frequency is to suitable range.When being greater than preset temperature value T1 such as the temperature value T0 of device for power switching, adjusting unit can be appropriate
Operating frequency is reduced, and reduces variable load wave frequency rate to a certain degree and improves frequency converter it is possible thereby to reduce the fever of power device
Reliability.Device for power switching is also protected simultaneously, improves the service life of the frequency conversion refrigerating plant, it is invalid to effectively reduce
Energy consumption, energy conservation and environmental protection.
In addition, the control device of the frequency conversion refrigerating plant in above-described embodiment provided by the invention can also have it is following attached
Add technical characteristic:
In the above-mentioned technical solutions, it is preferable that adjust unit and be also used to adjust carrier frequency to first when T0 is greater than T1
Frequency, first frequency are less than original frequency, wherein if the original frequency is that system runs minimum frequency, remain described first
Beginning frequency continues to run.
In the technical scheme, when the temperature value T0 of device for power switching is greater than preset temperature value T1, adjusting unit can be with
It is appropriate to reduce operating frequency, and variable load wave frequency rate is reduced to a certain degree to first frequency, if original frequency has been system operation
Minimum frequency, then maintain the original frequency to continue to run.Because opening for device for power switching is excessively high, secondary with the frequency of shutdown
Number excessively will lead to that temperature is excessively high, influence the performance of component, and carrier frequency can be reduced when more than certain temperature, reduce function
The fever of rate device improves the reliability of frequency converter.Device for power switching is also protected simultaneously, improves the frequency conversion refrigerating plant
Service life, effectively reduce ineffective energy consumption, energy conservation and environmental protection.
In the above-mentioned technical solutions, it is preferable that detection unit is also used to when T0 is less than or equal to T1, detection frequency conversion refrigeration dress
It whether sets in power consumption mode；Adjust unit be also used to when frequency conversion refrigerating plant be in power consumption mode, adjusting carrier frequency to
Second frequency, second frequency are less than original frequency, wherein if the original frequency is that system runs minimum frequency, maintain institute
Original frequency is stated to continue to run.
In the technical scheme, if the temperature value T0 of device for power switching is less than or equal to preset temperature value T1, list is detected
Member further monitors whether the frequency conversion refrigerating plant is in power consumption mode, if being in power consumption mode, adjusts unit and adjusts carrier wave
The second frequency of frequency to less than original frequency remains described first if original frequency has been the minimum frequency of system operation
Beginning frequency continues to run.The frequency conversion refrigerating plant, such as frequency conversion refrigerator, in power consumption mode operation, due to being reduced when revolving speed is lower
Carrier frequency is smaller on output electric current flatness influence, and carrier frequency can be reduced to a certain degree by adjusting unit, reduces power loss.
Compared with the refrigerator of traditional fixed frequency, the appropriate carrier frequency that reduces enhances the flexibility of working condition, and saves
Energy consumption.
In the above-mentioned technical solutions, it is preferable that it adjusts unit and is also used to when frequency conversion refrigerating plant is not in power consumption mode,
Original frequency is maintained to continue to run.
In the technical scheme, the temperature value T0 of device for power switching is less than preset temperature value T1, and the frequency conversion system
Device for cooling is not in power consumption mode, and the original frequency before can keeping at this time is constant, continues to run.With traditional fixed frequency
Refrigerator compare, by the judgement for temperature and power consumption mode, select suitable carrier frequency, enhancing for frequency conversion refrigerating plant
The flexibility of working condition avoids fixed frequency so that the frequency conversion refrigerating plant can choose suitable carrier frequency operation
The problems such as device for power switching generates heat in the refrigerator of rate reduces power loss, energy conservation and environmental protection.
In any of the above-described technical solution, it is preferable that after adjusting or maintaining carrier frequency, and pass through interval time t1,
Repeat the control process in the control device of the frequency conversion refrigerating plant of any of the above-described.
In the technical scheme, after adjusting the frequency conversion refrigerating plant according to condition, function in frequency conversion refrigerating plant is continued to test
The temperature value of rate switching device, when being again in conformance with the adjusting condition of carrier frequency, again to the carrier wave of the frequency conversion refrigerating plant
Frequency is adjusted.It is suitable for its selection under certain operating condition by the lasting detection for the frequency conversion refrigerating plant operating condition
Carrier frequency, the fever of power device can be reduced in this way, protect device for power switching, improve the reliability of frequency converter,
The service life of the frequency conversion refrigerating plant is improved, ineffective energy consumption, energy conservation and environmental protection are effectively reduced.
Embodiment according to the third aspect of the invention we, it is also proposed that a kind of refrigerator, the frequency conversion refrigeration including any of the above-described
The control device of device.
In the technical scheme, the carrier frequency that refrigerator is adjusted according to condition, by the lasting detection for refrigerator operating condition,
Suitable carrier frequency is selected for it under certain operating condition, the fever of power device can be reduced in this way, power is protected to open
Device is closed, the reliability of frequency converter is improved, improves the service life of the frequency conversion refrigerating plant and refrigerator, it is invalid to effectively reduce
Energy consumption, energy conservation and environmental protection.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
Fig. 1 shows the flow diagram of the control method of frequency conversion refrigerating plant according to an embodiment of the present；
Fig. 2 shows the process signals of the control method of the frequency conversion refrigerating plant of another embodiment according to the present invention
Figure；
Fig. 3 shows the process signal of the control method of the frequency conversion refrigerating plant of another embodiment according to the present invention
Figure；
Fig. 4 shows the schematic block diagram of the control device of frequency conversion refrigerating plant according to an embodiment of the present；
Fig. 5 shows the schematic block diagram of refrigerator according to an embodiment of the present.
Wherein, the corresponding relationship in Fig. 4 and Fig. 5 between appended drawing reference and component names are as follows:
The control device of 3 frequency conversion refrigerating plants, 302 recording units, 304 detection units, 306 comparing units, 308 adjust list
Member, 4 refrigerators.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Referring to the control method of the frequency conversion refrigerating plant of Fig. 1 to Fig. 3 description according to some embodiments of the invention.
As shown in Figure 1, the present invention provides a kind of control methods of frequency conversion refrigerating plant, for controlling frequency conversion refrigerating plant
The carrier frequency of middle frequency converter characterized by comprising step S102, in the operation of frequency conversion refrigerating plant by the load of frequency converter
Wave frequency rate is recorded as original frequency；Step S104 detects the temperature value T0 of device for power switching in frequency conversion refrigerating plant；Step
The temperature value T0 of device for power switching is compared by S106 with preset temperature value T1；Step S108, according to the ratio of step S106
Compared with as a result, adjusting carrier frequency.
The control method of frequency conversion refrigerating plant provided by the invention, by by the temperature value T0 of device for power switching and default
Temperature value T1 is compared, and using comparison result as foundation, adjusts carrier frequency to suitable range.Such as device for power switching
Temperature value T0 when being greater than preset temperature value T1, can suitably reduce operating frequency, and reduce variable load wave frequency rate to a certain degree, by
This can reduce the fever of power device, improve the reliability of frequency converter.Device for power switching is also protected simultaneously, improves this
The service life of frequency conversion refrigerating plant effectively reduces ineffective energy consumption, energy conservation and environmental protection.
In one embodiment of the invention, it is preferable that as shown in Fig. 2, the comparison result in step S106 is greater than for T0
When T1, S202 is entered step；Step S202 adjusts carrier frequency to first frequency, and first frequency is less than original frequency, wherein
If the original frequency is that system runs minimum frequency, the original frequency is maintained to continue to run.
In this embodiment, when the temperature value T0 of device for power switching is greater than preset temperature value T1, fortune can suitably be reduced
Turn frequency, and reduces variable load wave frequency rate to a certain degree to first frequency, if original frequency has been the minimum frequency of system operation,
The original frequency is then maintained to continue to run.Because the frequency of device for power switching opened with turned off is excessively high, number can excessively be led
It causes temperature excessively high, influences the performance of component, carrier frequency can be reduced when more than certain temperature, reduce the hair of power device
Heat improves the reliability of frequency converter.Device for power switching is also protected simultaneously, improve the frequency conversion refrigerating plant uses the longevity
Life, effectively reduces ineffective energy consumption, energy conservation and environmental protection.
In one embodiment of the invention, as shown in Figure 2, it is preferable that be less than in the comparison result of step S106 for T0
When equal to T1, S204 is entered step；Whether step S204, detection frequency conversion refrigerating plant are in power consumption mode；If frequency conversion refrigeration dress
It sets in power consumption mode, then enters step S206；Step S206 adjusts carrier frequency to second frequency, and second frequency is less than just
Beginning frequency, wherein if the original frequency is that system runs minimum frequency, the original frequency is maintained to continue to run.
In this embodiment, if the temperature value T0 of device for power switching is less than or equal to preset temperature value T1, further sentence
Whether the frequency conversion refrigerating plant that breaks is in power consumption mode, if being in power consumption mode, adjusts carrier frequency to less than original frequency
Second frequency, if original frequency be system operation minimum frequency, maintain the original frequency to continue to run.With biography
The refrigerator of the fixed frequency of system is compared, and the appropriate carrier frequency that reduces enhances the flexibility of working condition, and has saved energy consumption.
In one embodiment of the invention, as shown in Figure 2, it is preferable that if frequency conversion refrigerating plant is not in power consumption mode,
Then enter step S208；Step S208 maintains original frequency to continue to run.
In this embodiment, the temperature value T0 of device for power switching is less than preset temperature value T1, and the frequency conversion is freezed
Device is not in power consumption mode, and the original frequency before can keeping at this time is constant, continues to run.With traditional fixed frequency
Refrigerator is compared, and by the judgement for temperature and power consumption mode, is selected suitable carrier frequency for frequency conversion refrigerating plant, is enhanced
The flexibility of working condition avoids fixed frequency so that the frequency conversion refrigerating plant can choose suitable carrier frequency operation
Refrigerator in device for power switching fever the problems such as, reduce power loss, energy conservation and environmental protection.
In one embodiment of the invention, as shown in Figure 2, it is preferable that after adjusting or maintaining carrier frequency, and between process
Every time t1, repeating said steps S102 to the step S108.
In this embodiment, after adjusting the frequency conversion refrigerating plant according to condition, power in frequency conversion refrigerating plant is continued to test
The temperature value of switching device, when being again in conformance with the adjusting condition of carrier frequency, again to the carrier frequency of the frequency conversion refrigerating plant
Rate is adjusted.It is suitable for its selection under certain operating condition by the lasting detection for the frequency conversion refrigerating plant operating condition
Carrier frequency can reduce the fever of power device in this way, protect device for power switching, improve the reliability of frequency converter, mention
The service life for having risen the frequency conversion refrigerating plant effectively reduces ineffective energy consumption, energy conservation and environmental protection.
In one embodiment of the invention, as shown in figure 3, passing through sentencing for switching device temperature and power consumption mode
Disconnected, selection reduces appropriate carrier frequencies or maintains primary frequency, and is continuing monitoring switch device temperature later, into adjusting next time
Section process.
In this embodiment, by being reduced in carrier frequency to suitable range under different conditions, power device is reduced
The fever of part, protects device for power switching, improves the reliability of frequency converter, and improve the frequency conversion refrigerating plant uses the longevity
Life, effectively reduces ineffective energy consumption, energy conservation and environmental protection.And continue monitoring switch device temperature also after adjusting carrier frequency, weight
The multiple control process, ensure that when system meets adjusting condition, carrier frequency is adjusted at any time.
The present invention also provides a kind of control devices 3 of frequency conversion refrigerating plant, as shown in figure 4, for controlling frequency conversion refrigeration
The carrier frequency of frequency converter in device characterized by comprising recording unit 302, being used for will in the operation of frequency conversion refrigerating plant
The carrier frequency of frequency converter is recorded as original frequency；Detection unit 304, for detecting device for power switching in frequency conversion refrigerating plant
Temperature value T0；Comparing unit 306, for the temperature value T0 of device for power switching to be compared with preset temperature value T1；It adjusts
Unit 308 is saved, for the comparison result according to the temperature value T0 and preset temperature value T1 of device for power switching, adjusting carrier frequency
Rate.
In this embodiment, comparing unit 306 is by will test the temperature value T0 of the device for power switching that unit 304 measures
It is compared with preset temperature value T1, and using comparison result as foundation, adjusts unit 308 and adjust carrier frequency to suitable model
It encloses.When being greater than preset temperature value T1 such as the temperature value T0 of device for power switching, operating frequency can suitably be reduced by adjusting unit 308
Rate, and reduce variable load wave frequency rate to a certain degree and improve the reliability of frequency converter it is possible thereby to reduce the fever of power device.Together
When also protect device for power switching, improve the service life of the frequency conversion refrigerating plant, effectively reduce ineffective energy consumption, energy conservation
Environmental protection.
In one embodiment of the invention, as shown in Figure 4, it is preferable that adjust unit 308 and be also used to be greater than T1 in T0
When, carrier frequency is adjusted to first frequency, first frequency is less than original frequency, wherein if the original frequency is system operation
Minimum frequency then maintains the original frequency to continue to run.
In this embodiment, when the temperature value T0 of device for power switching is greater than preset temperature value T1, adjusting unit 308 can be with
It is appropriate to reduce operating frequency, and variable load wave frequency rate is reduced to a certain degree to first frequency, if original frequency has been system operation
Minimum frequency, then maintain the original frequency to continue to run.Because opening for device for power switching is excessively high, secondary with the frequency of shutdown
Number excessively will lead to that temperature is excessively high, influence the performance of component, and carrier frequency can be reduced when more than certain temperature, reduce function
The fever of rate device improves the reliability of frequency converter.Device for power switching is also protected simultaneously, improves the frequency conversion refrigerating plant
Service life, effectively reduce ineffective energy consumption, energy conservation and environmental protection.
In one embodiment of the invention, as shown in Figure 4, it is preferable that detection unit 304 is also used to be less than or equal in T0
When T1, whether detection frequency conversion refrigerating plant is in power consumption mode；Unit 308 is adjusted to be also used to be in energy consumption in frequency conversion refrigerating plant
When mode, carrier frequency is adjusted to second frequency, second frequency is less than original frequency, wherein if the original frequency is system
Minimum frequency is run, then the original frequency is maintained to continue to run.
In this embodiment, if the temperature value T0 of device for power switching is less than or equal to preset temperature value T1, detection unit
304 further monitor whether the frequency conversion refrigerating plant is in power consumption mode, if being in power consumption mode, adjust the adjusting of unit 308
The second frequency of carrier frequency to less than original frequency maintains institute if original frequency has been the minimum frequency of system operation
Original frequency is stated to continue to run.Carrier frequency can be reduced to a certain degree by adjusting unit 308, reduce power loss.Consolidate with traditional
The refrigerator for determining frequency is compared, and the appropriate carrier frequency that reduces enhances the flexibility of working condition, and has saved energy consumption.
In one embodiment of the invention, as shown in Figure 4, it is preferable that adjust unit 308 and be also used to fill in frequency conversion refrigeration
It sets when being not in power consumption mode, original frequency is maintained to continue to run.
In this embodiment, the temperature value T0 of device for power switching is less than preset temperature value T1, and the frequency conversion is freezed
Device is not in power consumption mode, and the original frequency before can keeping at this time is constant, continues to run.With traditional fixed frequency
Refrigerator is compared, and by the judgement for temperature and power consumption mode, is selected suitable carrier frequency for frequency conversion refrigerating plant, is enhanced
The flexibility of working condition avoids fixed frequency so that the frequency conversion refrigerating plant can choose suitable carrier frequency operation
Refrigerator in device for power switching fever the problems such as, reduce power loss, energy conservation and environmental protection.
In one embodiment of the invention, it is preferable that after adjusting or maintaining carrier frequency, and pass through interval time t1,
Repeat the control process in the control device 3 of the frequency conversion refrigerating plant of any of the above-described.
In this embodiment, after adjusting the frequency conversion refrigerating plant according to condition, detection unit 304 continues to test frequency conversion refrigeration
The temperature value of device for power switching in device adjusts unit 308 again to this when being again in conformance with the adjusting condition of carrier frequency
The carrier frequency of frequency conversion refrigerating plant is adjusted.By the lasting detection for the frequency conversion refrigerating plant operating condition, certain
Suitable carrier frequency is selected for it under operating condition, the fever of power device can be reduced in this way, protect device for power switching, mentioned
The reliability of high frequency converter improves the service life of the frequency conversion refrigerating plant, effectively reduces ineffective energy consumption, energy conservation and environmental protection.
In each embodiment of the control device 3 of frequency conversion refrigerating plant of the invention, for entire refrigeration system and
Compressor in system, fixed carrier frequency different from the past, but can select and be adjusted suitably with working environment
Carrier frequency, and carrier frequency can be adjusted when power consumption mode is run or when compressor operating, it can also be in compressor shutdown
Carrier frequency is first adjusted afterwards again by compressor start.
The present invention also provides a kind of refrigerators 4, as shown in figure 5, including the control of the frequency conversion refrigerating plant of any of the above-described
Device 3.
In this embodiment, the carrier frequency that refrigerator 4 is adjusted according to condition, by the lasting detection for 4 operating condition of refrigerator,
Suitable carrier frequency is selected for it under certain operating condition, the fever of power device can be reduced in this way, power is protected to open
Device is closed, the reliability of frequency converter is improved, improves the service life of refrigerator 4, effectively reduce ineffective energy consumption, energy conservation and environmental protection.
In the present invention, term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " peace
Dress ", " connected ", " connection ", the terms such as " fixation " shall be understood in a broad sense, can also be with for example, " connection " may be a fixed connection
It is to be detachably connected, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.It is right
For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of control method of frequency conversion refrigerating plant, for controlling the carrier frequency of frequency converter in the frequency conversion refrigerating plant,
It is characterised by comprising:
The carrier frequency of the frequency converter is recorded as original frequency in frequency conversion refrigerating plant operation by step S102；
Step S104 detects the temperature value T0 of device for power switching in the frequency conversion refrigerating plant；
The temperature value T0 of the device for power switching is compared by step S106 with preset temperature value T1；
Step S108 adjusts the carrier frequency according to the comparison result of the step S106；
When the comparison result of the step S106 is that T0 is greater than T1, S202 is entered step；
The step S202 adjusts the carrier frequency to first frequency, and the first frequency is less than the original frequency,
In, if the original frequency is that system runs minimum frequency, the original frequency is maintained to continue to run；
When the comparison result of the step S106 is that T0 is less than or equal to T1, S204 is entered step；
The step S204, detects whether the frequency conversion refrigerating plant is in power consumption mode；
If the frequency conversion refrigerating plant is in power consumption mode, S206 is entered step；
The step S206 adjusts the carrier frequency to second frequency, and the second frequency is less than the original frequency,
In, if the original frequency is that system runs minimum frequency, the original frequency is maintained to continue to run.
2. the control method of frequency conversion refrigerating plant according to claim 1, which is characterized in that further include:
If the frequency conversion refrigerating plant is not in power consumption mode, S208 is entered step；
The step S208, maintains the original frequency to continue to run.
3. the control method of frequency conversion refrigerating plant according to claim 1 or 2, which is characterized in that
After adjusting or maintaining the carrier frequency, and pass through interval time t1, repeating said steps S102 to the step S108.
4. a kind of control device of frequency conversion refrigerating plant, for controlling the carrier frequency of frequency converter in the frequency conversion refrigerating plant,
It is characterised by comprising:
Recording unit, for the carrier frequency of the frequency converter to be recorded as initial frequency in frequency conversion refrigerating plant operation
Rate；
Detection unit, for detecting the temperature value T0 of device for power switching in the frequency conversion refrigerating plant；
Comparing unit, for the temperature value T0 of the device for power switching to be compared with preset temperature value T1；
Unit is adjusted, for the comparison result according to the temperature value T0 and preset temperature value T1 of the device for power switching, adjusting
The carrier frequency；
The adjusting unit is also used to adjust the carrier frequency to first frequency, the first frequency is small when T0 is greater than T1
In the original frequency, wherein if the original frequency is that system runs minimum frequency, maintain the original frequency after reforwarding
Row；
The detection unit is also used to detect whether the frequency conversion refrigerating plant is in power consumption mode when T0 is less than or equal to T1；
The adjusting unit is also used to adjust the carrier frequency to second when the frequency conversion refrigerating plant is in power consumption mode
Frequency, the second frequency are less than the original frequency, wherein if the original frequency is that system runs minimum frequency, tie up
The original frequency is held to continue to run.
5. the control device of frequency conversion refrigerating plant according to claim 4, which is characterized in that
The adjusting unit is also used to when the frequency conversion refrigerating plant is not in power consumption mode, and the original frequency is maintained to continue
Operation.
6. a kind of refrigerator, which is characterized in that the control device including frequency conversion refrigerating plant as described in claim 4 or 5.
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| CN201610800932.3A CN106403486B (en) | 2016-09-02 | 2016-09-02 | Control method, control device and the refrigerator of frequency conversion refrigerating plant |
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| CN201610800932.3A CN106403486B (en) | 2016-09-02 | 2016-09-02 | Control method, control device and the refrigerator of frequency conversion refrigerating plant |
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| CN106403486B true CN106403486B (en) | 2019-06-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107013446B (en) * | 2017-04-25 | 2021-03-16 | 合肥华凌股份有限公司 | Control method of variable frequency compressor, variable frequency control panel and refrigeration equipment |
| CN111256276A (en) * | 2018-11-30 | 2020-06-09 | 广东美的制冷设备有限公司 | Operation control method and system, compressor and air conditioner |
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| CN1049760A (en) * | 1989-08-23 | 1991-03-06 | 三菱电机株式会社 | Pulse width modulation type inverter with temperature-compensating |
| CN1788411A (en) * | 2004-07-09 | 2006-06-14 | 松下电器产业株式会社 | Inverter circuit and compressor |
| CN101619722A (en) * | 2008-07-01 | 2010-01-06 | 海尔集团公司 | Method and circuit for controlling temperature of power module |
| CN205356160U (en) * | 2015-10-21 | 2016-06-29 | 广东源创节能环保科技有限公司 | High -efficient frequency conversion electricity -saving appliance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09140155A (en) * | 1995-11-16 | 1997-05-27 | Sanyo Electric Co Ltd | Protective method for inverter driver |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049760A (en) * | 1989-08-23 | 1991-03-06 | 三菱电机株式会社 | Pulse width modulation type inverter with temperature-compensating |
| CN1788411A (en) * | 2004-07-09 | 2006-06-14 | 松下电器产业株式会社 | Inverter circuit and compressor |
| CN101619722A (en) * | 2008-07-01 | 2010-01-06 | 海尔集团公司 | Method and circuit for controlling temperature of power module |
| CN205356160U (en) * | 2015-10-21 | 2016-06-29 | 广东源创节能环保科技有限公司 | High -efficient frequency conversion electricity -saving appliance |
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