CN105333563B - A kind of refrigeration control method, device and air conditioner - Google Patents
A kind of refrigeration control method, device and air conditioner Download PDFInfo
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- CN105333563B CN105333563B CN201410367322.XA CN201410367322A CN105333563B CN 105333563 B CN105333563 B CN 105333563B CN 201410367322 A CN201410367322 A CN 201410367322A CN 105333563 B CN105333563 B CN 105333563B
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 144
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000006835 compression Effects 0.000 claims abstract description 162
- 238000007906 compression Methods 0.000 claims abstract description 162
- 238000012545 processing Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000003507 refrigerant Substances 0.000 description 8
- 230000009467 reduction Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 230000002045 lasting effect Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention discloses a kind of refrigeration control method, device and air conditioner, is related to temperature control technology field, can realize the cryogenic refrigeration of air conditioner on the basis of the reliability of air conditioner is ensured.Concrete scheme is：Obtain the currency of outdoor environment temperature；When the currency of outdoor environment temperature is higher than the first preset temperature and is less than the second preset temperature, control and run under frequency of the compressor of air conditioner in the first running frequency section, and control the outdoor machine fan of air conditioner using the rotation speed operation in the first rotating speed section；When the lower-frequency limit value in the first running frequency section and the rotating speed higher limit in the first rotating speed section are respectively that air conditioner freezes under the first preset temperature, when can ensure that the compression ratio of compressor is at least recommendation compression ratio, the running frequency of compressor and the rotating speed of outdoor machine fan.During the present invention is used for air conditioner regulation temperature.
Description
Technical field
The present invention relates to temperature control technology field, more particularly to a kind of refrigeration control method, device and air conditioner.
Background technology
Air conditioner is air regulator, is a kind of common household electrical appliance, and it can generally have the function of heating and refrigeration.
Specifically, the process of refrigerastion of air conditioner can include：By compressor by the gaseous coolant boil down to high temperature of low pressure
The gaseous coolant of high pressure；The gaseous coolant of HTHP becomes high-pressure liquid refrigerant after delivering to the condenser radiating of outdoor unit, its
In, refrigerant discharges outdoor by the heat distributed during gaseous state to liquid by outdoor machine fan；Liquid refrigerants is by filtering
After getting in the rapid steamer of machine after device, throttling arrangement (such as electric expansion valve), residing space increase, the pressure born subtract
It is small, then it can vaporize, become gaseous coolant；Refrigerant absorbs amount of heat by liquid to gaseous process, causes the temperature of evaporator
Degree reduce, indoor machine fan by interior air via being blown in evaporator, then can be with blowing cold air.
But the problem of existing, is：When air conditioner cooling operation under the low temperature condition below 0 DEG C of outdoor temperature, by
Low in outdoor environment temperature, (i.e. condenser receives the gaseous state system of the HTHP from compressor to the heat transfer temperature difference of condenser
The temperature of cryogen and the difference of outdoor temperature) become big, condensation process heat release increases, and high pressure does not rise, and causes the compression of compressor
Than diminishing, and then refrigerant circulation is caused to reduce, indoor set refrigerating capacity reduces.If air conditioner continues to make in this case
Cold, the compression ratio of compressor will be reduced persistently, and when the compression ratio of compressor is less than the minimum compression ratio of compressor, compressor exists
Oil return and the lubrication of compressor electric motor of air conditioner can be influenceed by being worked under improper compression ratio, final to influence the reliable of compressor
Property, and then influence the reliability of air conditioner complete machine.
The content of the invention
Embodiments of the invention provide a kind of refrigeration control method, device and air conditioner, it is possible to achieve the low temperature of air conditioner
Refrigeration, while improve the reliability of air conditioner during air conditioner cryogenic refrigeration.
To reach above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
The first aspect of the embodiment of the present invention, there is provided a kind of refrigeration control method, applied to air conditioner, the refrigeration control side
Method includes：
Obtain the currency of outdoor environment temperature；
When the currency of the outdoor environment temperature is higher than the first preset temperature, and the currency of the outdoor environment temperature
During less than the second preset temperature, the compressor operating frequency of the air conditioner is controlled in the first running frequency section, and is controlled
The outdoor machine fan of the air conditioner is made using the rotation speed operation in the first rotating speed section；First preset temperature is less than described
Second preset temperature, first preset temperature are less than 0 DEG C；
When the currency of the outdoor environment temperature is higher than second preset temperature, by the compressor of the air conditioner
Running frequency is controlled in the second running frequency section, and controls the outdoor machine fan of the air conditioner to use the second rotating speed section
Interior rotation speed operation；The lower-frequency limit value in the second running frequency section is more than or equal to the frequency in the first running frequency section
Rate higher limit, the rotating speed higher limit in the second rotating speed section are less than or equal to the lower rotation speed limit value in the first rotating speed section.
The second aspect of the embodiment of the present invention, a kind of refrigeration control device is also provided, be contained in air conditioner, described device bag
Include：
Acquiring unit, for obtaining the currency of outdoor environment temperature；
First control unit, for being higher than the first preset temperature, and the room when the currency of the outdoor environment temperature
When the currency of external environment temperature is less than the second preset temperature, by the compressor operating frequency control of the air conditioner in the first fortune
In line frequency section；When the currency of the outdoor environment temperature is higher than second preset temperature, by the air conditioner
Compressor operating frequency is controlled in the second running frequency section；First preset temperature is less than second preset temperature,
First preset temperature is less than 0 DEG C；The lower-frequency limit value in the second running frequency section is more than or equal to the described first operation
The upper frequency limit value of frequency separation；
Second control unit, for being higher than first preset temperature, and institute when the currency of the outdoor environment temperature
When stating the currency of outdoor environment temperature and being less than second preset temperature, the outdoor machine fan of the air conditioner is controlled using the
Rotation speed operation in one rotating speed section；When the currency of the outdoor environment temperature is higher than second preset temperature, control
The outdoor machine fan of the air conditioner is using the rotation speed operation in the second rotating speed section；The rotating speed upper limit in the second rotating speed section
Lower rotation speed limit value of the value less than or equal to the first rotating speed section.
The third aspect of the embodiment of the present invention, also provides a kind of air conditioner, and the air conditioner includes：
Memory, for storing batch processing code；
Processor, for performing the program code stored in the memory, specific for performing following operate：
Obtain the currency of outdoor environment temperature；
When the currency of the outdoor environment temperature is higher than the first preset temperature, and the currency of the outdoor environment temperature
During less than the second preset temperature, the compressor operating frequency of the air conditioner is controlled in the first running frequency section, and is controlled
The outdoor machine fan of the air conditioner is made using the rotation speed operation in the first rotating speed section；First preset temperature is less than described
Second preset temperature, first preset temperature are less than 0 DEG C；
When the currency of the outdoor environment temperature is higher than second preset temperature, by the compressor of the air conditioner
Running frequency is controlled in the second running frequency section, and controls the outdoor machine fan of the air conditioner to use the second rotating speed section
Interior rotation speed operation；The lower-frequency limit value in the second running frequency section is more than or equal to the frequency in the first running frequency section
Rate higher limit, the rotating speed higher limit in the second rotating speed section are less than or equal to the lower rotation speed limit value in the first rotating speed section.
Refrigeration control method, device and air conditioner provided in an embodiment of the present invention, when air conditioner carries out cryogenic refrigeration (the
Freeze in the temperature range of one preset temperature to the second preset temperature) when, the compressor operating frequency of air conditioner can be controlled
In the first running frequency section, and the outdoor machine fan of air conditioner is controlled using the rotation speed operation in the first rotating speed section.
With in the prior art, due to air conditioner when carrying out cryogenic refrigeration (i.e. outdoor environment temperature less than 0 DEG C) compressor
Compression ratio lasting reduction, when compressor compression ratio be less than compressor recommendation compression ratio when, it is impossible to ensure compressor
The reliability of even air conditioner complete machine is compared, due to the lower-frequency limit value in the first running frequency section and turning for the first rotating speed section
When fast higher limit is respectively that air conditioner freezes under the first preset temperature (limit value at a temperature of cryogenic refrigeration), it is ensured that compression
When the compression ratio of machine is at least recommendation compression ratio, the running frequency of compressor and the rotating speed of outdoor machine fan, and higher than above-mentioned
When being freezed in other temperature ranges of temperature upper limit value, the compression ratio of compressor is actually to be more than to limit at the temperature disclosed above
The compression ratio of compressor when being freezed under value；Therefore, when air conditioner is in the humidity province more than or equal to limit value at this temperature
Between when cryogenic refrigeration is carried out in (temperature range of the first preset temperature to the second preset temperature), if still controlling on compressor operating
Stating can ensure that the compression ratio of compressor is at least under the running frequency for recommending compression ratio, and control outdoor machine fan using above-mentioned
It can ensure that the compression ratio of compressor is at least the rotation speed operation for recommending compression ratio, then can at least ensure the compressor of compressor
To recommend compression ratio, you can to ensure the normal operation of compressor, thereby may be ensured that the reliability of compressor, and then improve
The possibility of air conditioner normal work during cryogenic refrigeration.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of refrigeration control method flow chart in the embodiment of the present invention 1；
Fig. 2 is a kind of refrigeration control method flow chart in the embodiment of the present invention 2；
Fig. 3 is a kind of composition schematic diagram of refrigeration control device in the embodiment of the present invention 3；
Fig. 4 is the composition schematic diagram of another refrigeration control device in the embodiment of the present invention 3；
Fig. 5 is the composition schematic diagram of another refrigeration control device in the embodiment of the present invention 3；
Fig. 6 is the composition schematic diagram of another refrigeration control device in the embodiment of the present invention 3；
Fig. 7 is the composition schematic diagram of another refrigeration control device in the embodiment of the present invention 3；
Fig. 8 is the composition schematic diagram of another refrigeration control device in the embodiment of the present invention 3；
Fig. 9 is a kind of composition schematic diagram of air conditioner in the embodiment of the present invention 4；
Figure 10 is the composition schematic diagram of another air conditioner in the embodiment of the present invention 4.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In addition, the terms " system " and " network " are often used interchangeably herein.The terms " and/
Or ", only a kind of incidence relation for describing affiliated partner, represents there may be three kinds of relations, for example, A and/or B, can be with table
Show：Individualism A, while A and B be present, these three situations of individualism B.In addition, character "/" herein, is typicallyed represent front and rear
Affiliated partner is a kind of relation of "or".
Air conditioner can be small-sized household air conditioner, i.e. one-to-one；Can also be multi-gang air-conditioner device, i.e., one drag it is more.One
One is dragged to refer to that an outdoor unit connects the air conditioner of an indoor set by pipe arrangement；One drags and refers to that an outdoor unit passes through more
Pipe arrangement connects the air conditioner of more than two (i.e. at least two) indoor sets.
Typically there are air conditioner heating, refrigeration and dehumidifying isotype, different application scenarios to use different pattern works
Make.The embodiment of the present invention can apply to the process of refrigerastion of air conditioner, it is particularly possible to applied to outdoor environment temperature below 0 DEG C
The situation that the most of air conditioners of in the market can not freeze.
Embodiment 1
The embodiment of the present invention provides a kind of refrigeration control method, applied to air conditioner, as shown in figure 1, this method specifically may be used
With including：
S101, refrigeration control device obtain the currency of outdoor environment temperature.
Wherein, refrigeration control device can be by monitoring outdoor environment temperature, to obtain working as outdoor environment temperature in real time
Preceding value；Or refrigeration control device according to certain detection cycle, can be periodically detected the temperature value of outdoor environment temperature,
And the temperature value for the outdoor environment temperature for detecting refrigeration control device in the detection cycle where current time is as room
The currency of external environment temperature.
Exemplary, refrigeration control device can use the temperature measuring devices such as temperature sensor, thermometer and thermometer prison
Survey the change of outdoor environment temperature, or the temperature value of monitoring outdoor environment temperature.
It should be noted that in embodiments of the present invention, refrigeration control device obtains the currency of outdoor environment temperature
Method includes but is not limited to above-mentioned cited method, and refrigeration control device obtains its other party of the currency of outdoor environment temperature
Method may be referred to associated description of the prior art, and the embodiment of the present invention repeats no more here.
S102, it is higher than the first preset temperature when the currency of outdoor environment temperature, and the currency of outdoor environment temperature is low
When the second preset temperature, refrigeration control device controls the compressor operating frequency of air conditioner in the first running frequency section
It is interior, and the outdoor machine fan of air conditioner is controlled using the rotation speed operation in the first rotating speed section.
Wherein, the first preset temperature is less than the second preset temperature, and the first preset temperature is less than 0 DEG C.
It should be noted that the first preset temperature is the sky that determination is required according to system reliability and system fan-out capability
The lowest refrigerating temperature for adjusting device to reach.First preset temperature can be a temperature value or temperature range, and second is default warm
Degree can also be that a temperature value or temperature range, the embodiment of the present invention are not limited.When preset temperature is a humidity province
Between when, represented less than preset temperature less than the minimum temperature value in the temperature range, represent to be higher than the temperature higher than preset temperature
Maximum temperature values in section.
Wherein, when the lower-frequency limit value in the first running frequency section is that air conditioner freezes under the first preset temperature, pressure is worked as
When the compression ratio of contracting machine is the recommendation compression ratio of compressor, the running frequency of compressor.
Wherein, the compression ratio of compressor refer to system operating in, pressure at expulsion (compressor discharge gas pressure) with
The ratio of pressure of inspiration(Pi) (pressure of the gas of compressor suction), the compression ratio of recommending of compressor is when compressor runs well
Minimum compression ratio, the recommendation compression ratio of general compressor can be indicated in the specifications of air conditioner.
Specifically, when the timing of rotating speed one of outdoor machine fan, if the running frequency of regulation compressor, with the fortune of compressor
Respective change can occur for the change of line frequency, the compression ratio of compressor.Specifically, fortune of the compression ratio of compressor with compressor
The increase of line frequency and become big；The compression ratio of compressor diminishes with the reduction of the running frequency of compressor.
Compression ratio during compressor operating is vital for the compressor life-span, if compression during compressor operating
Than the recommendation compression ratio less than compressor, the reliability of compressor can be influenceed, therefore general compression when requiring compressor operating
Than the recommendation compression ratio not less than compressor, to ensure the reliability of compressor.If the running frequency of compressor is too low, may lead
Cause the compression ratio of compressor to be less than the recommendation compression ratio of compressor, can so influence the reliability of compressor, therefore, it is necessary to control
The running frequency of compressor, the running frequency of compressor when the compression ratio for obtaining compressor is the recommendation compression ratio of compressor, will
Now lower-frequency limit value of the running frequency of compressor as the first running frequency section.If the running frequency of compressor is less than the
The lower-frequency limit value in one running frequency section, the reliability of compressor can be influenceed；If the running frequency of compressor is higher than the first fortune
The lower-frequency limit value in line frequency section, compressor can run well, and not interfere with the reliability of compressor.First running frequency
The lower-frequency limit value in section is to can guarantee that the minimum running frequency that compressor runs well.Therefore, in embodiments of the present invention, make
The compressor of cold control device control air conditioner is run in the first running frequency section.
Exemplary, the lower-frequency limit value in the first running frequency section in the embodiment of the present invention can be by testing
Arrive.Specific experimentation can include：Control air conditioner freezes under the first preset temperature, obtains the compression of compressor in real time
Than if the compression ratio of compressor is more than the recommendation compression ratio of compressor, the running frequency of compressor progressively being turned down, to obtain pressure
The compression ratio of contracting machine be equal to compressor recommend compression ratio when corresponding compressor running frequency, and using the running frequency as
The lower-frequency limit value in the first running frequency section；If the compression ratio of compressor is less than the recommendation compression ratio of compressor, progressively adjust
The running frequency of big compressor, to obtain corresponding compressor when the compression ratio of compressor is equal to the recommendation compression ratio of compressor
Running frequency, and the lower-frequency limit value using the running frequency as the first running frequency section.
Wherein, the rotating speed higher limit in the first rotating speed section is that air conditioner freezes under the first preset temperature, and compressor
When running frequency is the lower-frequency limit value in the first running frequency section, when the recommendation compression ratio that the compression ratio of compressor is compressor
When, the rotating speed of outdoor machine fan.
It should be noted that when the timing of running frequency one of compressor, if the rotating speed of regulation outdoor machine fan, with outdoor
Respective change can occur for the change of the rotating speed of machine fan, the compression ratio of compressor.Specifically, the compression ratio of compressor is with outdoor
The increase of the rotating speed of machine fan and diminish；The compression ratio of compressor becomes big with the reduction of the rotating speed of outdoor machine fan.At this
In inventive embodiments, refrigeration control device controls the frequency that the running frequency of the compressor of air conditioner is the first running frequency section
Lower limit (running frequency of compressor is certain), by adjusting the rotating speed of outdoor machine fan, may further ensure that compressor
Reliability.
Exemplary, the rotating speed higher limit in the first rotating speed section in the embodiment of the present invention can also be obtained by experiment.
Specific experimentation can include：Control control air conditioner freezes under the first preset temperature, and the running frequency of compressor
For the lower-frequency limit value in the first running frequency section, the compression ratio of compressor is obtained in real time, is pressed if the compression ratio of compressor is more than
The recommendation compression ratio of contracting machine, then the rotating speed of outdoor machine fan is progressively tuned up, to obtain the compression ratio of compressor equal to compressor
The rotating speed of corresponding outdoor machine fan during recommendation compression ratio, and turn using the rotating speed of the outdoor machine fan as the first rotating speed section
Fast higher limit；If the compression ratio of compressor is less than the recommendation compression ratio of compressor, the rotating speed of outdoor machine fan is progressively turned down, with
The compression ratio for obtaining compressor is equal to the rotating speed of corresponding outdoor machine fan when recommending compression ratio of compressor, and by the outdoor unit
Rotating speed higher limit of the rotating speed of fan as the first rotating speed section.
S103, when the currency of outdoor environment temperature is higher than the second preset temperature, refrigeration control device is by air conditioner
Compressor operating frequency is controlled in the second running frequency section, and controls the outdoor machine fan of air conditioner to use the second rotating speed area
Interior rotation speed operation.
Wherein, the lower-frequency limit value in the second running frequency section is more than or equal to the upper frequency limit in the first running frequency section
Value, the rotating speed higher limit in the second rotating speed section are less than or equal to the lower rotation speed limit value in the first rotating speed section.
Further, the method for the embodiment of the present invention can also include：When the currency of outdoor environment temperature is less than first
During preset temperature, refrigeration control device control air conditioner enters shutdown mode；Wherein, shutdown mode includes：The shutdown of air conditioner
Pattern, or the park mode of air conditioner.
Exemplary, the shutdown mode (Off mode) of air conditioner can be the institute when air conditioner is connected with power supply
A kind of low-power mode being under closed mode.Wherein, when the currency of outdoor environment temperature is less than the first preset temperature,
It is current when outdoor environment temperature if outdoor environment temperature raises after refrigeration control device control air conditioner enters shutdown mode
When value is higher than the first preset temperature, the air conditioner remains in shutdown mode, until thinking to control the air conditioner to open, the air-conditioning
Device can continue to run with.When the park mode (Sleep mode) of air conditioner can be that air conditioner is connected with power supply, institute
Place in the on state but a kind of low-power mode out of service.Wherein, when the currency of outdoor environment temperature is less than the
During one preset temperature, after refrigeration control device control air conditioner enters shutdown mode, if outdoor environment temperature raises, when outdoor ring
When the currency of border temperature is higher than the first preset temperature, refrigeration control device can restart the air conditioner, using the present invention
Refrigeration control method in embodiment controls the air conditioner to continue to run with.
Refrigeration control method provided in an embodiment of the present invention, when air conditioner carries out cryogenic refrigeration (in the first preset temperature extremely
Freeze in the temperature range of second preset temperature) when, can be by the compressor operating frequency control of air conditioner in the first operation frequency
In rate section, and the outdoor machine fan of air conditioner is controlled using the rotation speed operation in the first rotating speed section.
With in the prior art, due to air conditioner when carrying out cryogenic refrigeration (i.e. outdoor environment temperature less than 0 DEG C) compressor
Compression ratio lasting reduction, when compressor compression ratio be less than compressor recommendation compression ratio when, it is impossible to ensure compressor
The reliability of even air conditioner complete machine is compared, due to the lower-frequency limit value in the first running frequency section and turning for the first rotating speed section
When fast higher limit is respectively that air conditioner freezes under the first preset temperature (limit value at a temperature of cryogenic refrigeration), it is ensured that compression
When the compression ratio of machine is at least recommendation compression ratio, the running frequency of compressor and the rotating speed of outdoor machine fan, and higher than above-mentioned
When being freezed in other temperature ranges of temperature upper limit value, the compression ratio of compressor is actually to be more than to limit at the temperature disclosed above
The compression ratio of compressor when being freezed under value；Therefore, when air conditioner is in the humidity province more than or equal to limit value at this temperature
Between when cryogenic refrigeration is carried out in (temperature range of the first preset temperature to the second preset temperature), if still controlling on compressor operating
Stating can ensure that the compression ratio of compressor is at least under the running frequency for recommending compression ratio, and control outdoor machine fan using above-mentioned
It can ensure that the compression ratio of compressor is at least the rotation speed operation for recommending compression ratio, then can at least ensure the compressor of compressor
To recommend compression ratio, you can to ensure the normal operation of compressor, thereby may be ensured that the reliability of compressor, and then improve
The possibility of air conditioner normal work during cryogenic refrigeration.
Embodiment 2
The embodiment of the present invention provides a kind of refrigeration control method, is carried out by taking the process of refrigerastion of a specific air conditioner as an example
Illustrate, as shown in Fig. 2 specific steps can include：
S201, refrigeration control device obtain the current operation mode of air conditioner, and obtain the currency of outdoor environment temperature.
Optionally, the current operation mode of air conditioner can be this start after reset or continue on
Pattern before once shutting down, can be set according to being actually needed.
S202, refrigeration control device judge whether the current operation mode of air conditioner is refrigeration mode.
Specifically, if the current operation mode of air conditioner is not refrigeration mode, S203 is performed；If the current work of air conditioner
Operation mode is refrigeration mode, then performs S204.
S203, refrigeration control device carry out other Schema controls.
Wherein, other Schema controls may be referred to corresponding control methods of the prior art, and the embodiment of the present invention is here not
Repeat again.
S204, refrigeration control device judge whether the currency of outdoor environment temperature is higher than the first preset temperature, and are less than
Second preset temperature.
Wherein, the first preset temperature is less than the second preset temperature.First preset temperature can be a temperature value or temperature
Section, the second preset temperature can also be a temperature value or temperature range.
Optionally, in embodiments of the present invention, the first preset temperature can be set smaller than to 0 DEG C of temperature value.It is preferred that
, the first preset temperature can be arranged to -15 DEG C of temperature value.
It is further alternative, in embodiments of the present invention, the second preset temperature can be arranged to a specific temperature
Value, for example, the second preset temperature to be arranged to 10 DEG C of situation, when outdoor environment temperature a little higher than 10 DEG C (such as 10.5 DEG C)
When, air conditioner can use normal refrigerating mode to control, when outdoor environment temperature is from when being reduced to 10 DEG C for 10.5 degrees Celsius, air conditioner
Cryogenic refrigeration Schema control can be used again.
Wherein, normal refrigerating mode controls, i.e. the refrigeration control mode of air conditioner in the prior art.Cryogenic refrigeration pattern control
System, i.e., in embodiments of the present invention, when temperature of the currency in the first preset temperature to the second preset temperature of outdoor environment temperature
When spending refrigeration in section, the refrigeration control method of use.
Preferably, due to when the second preset temperature is arranged into specific temperature value (temperature values of such as 10 DEG C),
If outdoor environment temperature frequently in 10 DEG C or so fluctuating changes, may result in refrigeration control device frequently in normally refrigeration mould
Formula controls to be switched between cryogenic refrigeration Schema control, causes system unstable, therefore, can also be incited somebody to action in embodiments of the present invention
Second preset temperature is arranged to a temperature range, to avoid the frequent fluctuation due to outdoor environment temperature from influenceing air conditioner operation
Stability.
For example, in embodiments of the present invention, the second preset temperature can be arranged to 10 DEG C~12 DEG C of temperature range.When
For outdoor environment temperature from when rising to 10.5 DEG C for 10 DEG C, air conditioner still uses cryogenic refrigeration Schema control, only works as outdoor environment
When temperature rises to 12 DEG C and the above, air conditioner just exits cryogenic refrigeration Schema control, switches to normal refrigerating mode control；When
When outdoor environment temperature is 12.5 DEG C, air conditioner is controlled using normal refrigerating mode, when outdoor environment temperature reduces from 12.5 DEG C
For 11 DEG C when, air conditioner is still controlled using normal refrigerating mode, only when outdoor environment temperature be reduced to 10 DEG C and it is following when, it is empty
Device is adjusted just to enter cryogenic refrigeration pattern.It can thus avoid refrigeration control device when outdoor environment fluctuates frequently in normal mode
Switch between formula and cryogenic refrigeration pattern, the problem of causing system unstable.
It should be noted that temperature range is set to the second preset temperature exemplified by 10 DEG C~12 DEG C in the embodiment of the present invention
Situation illustrate.The specific scope of the temperature range includes but is not limited to 10 DEG C~12 DEG C, and the temperature range can basis
The specific soft hardware performance or actual use demand (e.g., the change of outdoor environment temperature) of air conditioner are configured, the present invention
Embodiment is not limited the specific value of temperature range.
Specifically, if the currency of outdoor environment temperature is higher than the second preset temperature, S205 is performed；If outdoor environment temperature
The currency of degree is higher than the first preset temperature, and is less than the second preset temperature, then performs S206~S207；Work as outdoor environment temperature
Currency when being less than the first preset temperature, refrigeration control device control air conditioner enters shutdown mode.S206~S207 is low
Warm refrigeration mode control.
S205, refrigeration control device control the compressor operating frequency of air conditioner in the second running frequency section, and
The outdoor machine fan of air conditioner is controlled using the rotation speed operation in the second rotating speed section.
Wherein, the lower-frequency limit value in the second running frequency section is more than or equal to the upper frequency limit in the first running frequency section
Value, the rotating speed higher limit in the second rotating speed section are less than or equal to the lower rotation speed limit value in the first rotating speed section.The control method of this step
I.e. normal refrigerating mode controls, and the setting in specific second running frequency section and the second rotating speed section may be referred to prior art
The refrigeration control method of middle air conditioner, the embodiment of the present invention repeat no more here.
S206, the compressor of refrigeration control device control air conditioner are run in the first running frequency section.
Wherein, when the lower-frequency limit value in the first running frequency section is that air conditioner freezes under the first preset temperature, pressure is worked as
When the compression ratio of contracting machine is the recommendation compression ratio of compressor, the running frequency of compressor.
Wherein, the compression ratio of compressor refer to system operating in, pressure at expulsion (compressor discharge gas pressure) with
The ratio of pressure of inspiration(Pi) (pressure of the gas of compressor suction), the compression ratio of recommending of compressor is when compressor runs well
Minimum compression ratio, the recommendation compression ratio of general compressor can be indicated in the specifications of air conditioner.
Exemplary, the lower-frequency limit value in the first running frequency section in the embodiment of the present invention can be by testing
Arrive.Specific experimentation can include：Control air conditioner freezes under the first preset temperature, and progressively adjusts the fortune of compressor
Line frequency, to obtain the running frequency of corresponding compressor when the compression ratio of compressor meets recommendation compression ratio, and this is run
Minimum running frequency of the frequency as compressor under cryogenic refrigeration pattern, namely the lower-frequency limit value in the first running frequency section.
For example, in an experiment, the recommendation compression ratio of compressor is 2, controls air conditioner to freeze when outdoor environment temperature is -15 DEG C, by
The running frequency of step section compressor, obtain the operation of the corresponding compressor when the compression ratio of compressor meets recommendation compression ratio
Frequency is 43hz, then the lower-frequency limit value in the first running frequency section is arranged into 43hz.
It should be noted that under possessing the frequency in the first running frequency section of the air conditioner of different standard refrigerating capacities
Limit value is different.Wherein, standard refrigerating capacity is used for the maximum cooling capacity for characterizing air conditioner.For example, it is assumed that the maximum of 1P air conditioners
Refrigerating capacity is about 2500W, then in embodiments of the present invention, the standard refrigerating capacity of 1P air conditioners can be arranged into 2500W；
The maximum cooling capacity of 1.5P air conditioners is about 3500W, then in embodiments of the present invention, can freeze the standard of 1.5P air-conditionings energy
Power is arranged to 3500W etc..The recommendation compression ratio of the compressor of air conditioner with various criterion refrigerating capacity is different, and corresponding the
The lower-frequency limit value in one running frequency section is also just different.
It should be noted that when the running frequency of the compressor required by the current refrigeration capacity of air conditioner is less than the first operation
During the lower-frequency limit value of frequency separation, the compressor of air conditioner is still controlled to be transported under the lower-frequency limit value in the first running frequency section
OK.So be in order to ensure that the compression ratio of compressor meets the recommendation compression ratio of compressor, can so as to ensure compressor
By property.
S207, the outdoor machine fan of refrigeration control device control air conditioner are using the rotation speed operation in the first rotating speed section.
Wherein, the rotating speed higher limit in the first rotating speed section is that air conditioner freezes under the first preset temperature, and compressor
When running frequency is the lower-frequency limit value in the first running frequency section, when the recommendation compression ratio that the compression ratio of compressor is compressor
When, the rotating speed of outdoor machine fan.
Exemplary, the rotating speed higher limit in the first rotating speed section in the embodiment of the present invention can be obtained by experiment.Tool
The experimentation of body can include：Control air conditioner freezes under the first preset temperature, and the running frequency of compressor is first
The lower-frequency limit value in running frequency section, and the rotating speed of outdoor machine fan is progressively adjusted, met with obtaining the compression ratio of compressor
Recommend compression ratio when corresponding outdoor machine fan rotating speed, and using the rotating speed as outdoor machine fan under cryogenic refrigeration pattern most
The slow-speed of revolution, namely the rotating speed higher limit in the first rotating speed section.For example, in an experiment, the recommendation compression ratio of compressor is 2, control
Air conditioner freezes when outdoor environment temperature is -15 DEG C, and the running frequency of compressor is the frequency in the first running frequency section
Lower limit 43hz, the rotating speed of outdoor machine fan is progressively adjusted, obtain corresponding to when the compression ratio of compressor meets and recommends compression ratio
The rotating speed of outdoor machine fan be 130rpm, then the rotating speed higher limit in the first rotating speed section is arranged to 130rpm.
It should be noted that possesses the rotating speed higher limit in the first rotating speed section of the air conditioner of different standard refrigerating capacities
It is different.Wherein, standard refrigerating capacity is used for the maximum cooling capacity for characterizing air conditioner.For example, it is assumed that the maximum refrigeration of 1P air conditioners
Amount is about 2500W, then in embodiments of the present invention, the standard refrigerating capacity of 1P air conditioners can be arranged into 2500W；It is 1.5P empty
The maximum cooling capacity for adjusting device is about 3500W, then in embodiments of the present invention, can set the standard refrigerating capacity of 1.5P air-conditionings
For 3500W etc..The recommendation compression ratio of the compressor of air conditioner with various criterion refrigerating capacity is different, corresponding first rotating speed
The rotating speed higher limit in section is also just different.
S207 can specifically include：
S207a, refrigeration control device are by the rotational speed regulation of outdoor machine fan to preset rotation speed.
Wherein, preset rotation speed is more than or equal to the lower rotation speed limit value in the first rotating speed section, and is less than or equal to the first rotating speed section
Rotating speed higher limit
S207b, refrigeration control device obtain the currency of outdoor unit coil temperature.
Wherein, outdoor unit coil pipe is the condenser pipe of outdoor unit, and outdoor unit coil temperature is cold inside the condenser pipe of outdoor unit
The temperature value of matchmaker, the temperature value can be represented by the temperature value of the condenser pipe of outdoor unit in itself, i.e. outdoor unit coil temperature
For characterizing the temperature of refrigerant in air conditioner process of refrigerastion.
Wherein, refrigeration control device can be after the currency of outdoor unit coil temperature be got, according to outdoor unit coil pipe
The currency of temperature is further finely tuned to the rotating speed of outdoor machine fan.Specifically, if outdoor unit coil temperature is current
Value is more than default coil temperature, then continues executing with S207c；If the currency of outdoor unit coil temperature is less than default coil temperature,
Then continue executing with S207d；If outdoor unit coil temperature is equal to default coil temperature, control outdoor machine fan is using default fortune
Turn.
S207c, refrigeration control device control outdoor machine fan are more than or equal to preset rotation speed using in the first rotating speed section
Rotation speed operation.
Wherein, it is that air conditioner freezes under the first preset temperature to preset coil temperature, and the running frequency of compressor is the
During the lower-frequency limit value in one running frequency section, the temperature of outdoor unit coil pipe.
S207d, refrigeration control device control outdoor machine fan are less than or equal to preset rotation speed using in the first rotating speed section
Rotation speed operation.
The outer machine electric expansion valve of S208, refrigeration control device control room.
It should be noted that S208 is optional.It is in order in control compressor operating that the embodiment of the present invention, which performs S208,
After the rotating speed of frequency and outdoor machine fan, then it is finely adjusted by machine electric expansion valve outside control room, can so adjusts refrigerant
Flow, be further ensured that the refrigerating capacity of air conditioner.
Wherein, S208 can specifically include：
S208a, refrigeration control device determine initial valve opening, and keep outdoor unit electronic expansion valve opening to be adjusted to initially
Valve opening continues preset time.
Wherein, initial valve opening is in the embodiment of the present invention, during the outer machine electric expansion valve of control room, outdoor unit electronic expansion
The initial opening of valve.
Wherein it is determined that the step of initial valve opening, can include：According to the first linear relationship, using the operation frequency of compressor
Rate calculates the first valve opening of outdoor machine electric expansion valve.If the first valve opening is more than or equal to the second valve opening, by the first valve
Aperture is defined as initial valve opening.If the first valve opening is less than the second valve opening, the second valve opening is defined as initial valve and opened
Degree.
Wherein, linear pass of first linear relationship between outdoor unit electronic expansion valve opening and the running frequency of compressor
System, this linear relationship can obtain according to experiment, with the renewal that the software and hardware of air conditioner configures, this linear relationship
It can change, be defined by the experiment of the existing newest air conditioner of in the market.For example, in the embodiment of the present invention, first is linear
Relation is y=0.2x+60, wherein, y represents outdoor unit electronic expansion valve opening, and x represents the running frequency of compressor.According to this
The outdoor unit electronic expansion valve opening that linear relationship obtains is the first aperture.Second valve opening is air conditioner in the first preset temperature
During lower refrigeration, when the compression ratio of compressor is the recommendation compression ratio of compressor, the aperture of electric expansion valve.It is for example, of the invention
The second valve opening is 128 in embodiment.
S208b, refrigeration control device timing since being initial valve opening by the aperture regulation of outdoor unit electric expansion valve,
After preset time, continue the aperture of machine electric expansion valve outside regulation room according to discharge superheat or suction superheat.
Wherein, refrigeration control device is according to the method for the aperture of machine electric expansion valve outside discharge superheat regulation room, specifically
It can include：
Step 1, refrigeration control device obtain the desired value of discharge superheat according to the current operation frequency of compressor.
Wherein, refrigeration control device can calculate row according to the second linear relationship using the current operation frequency of compressor
The desired value of the gas degree of superheat.Second linear relationship can obtain according to experiment.Configured more with the software and hardware of air conditioner
Newly, this linear relationship can change, and be defined by the experiment of the existing newest air conditioner of in the market.Exemplary, at this
In inventive embodiments, preset time is 5 minutes, and the second linear relationship is y=Kx+B, and wherein y represents the target exhaust degree of superheat, model
Enclose and represent the running frequency of compressor for (12~35), x, scope is (20~98hz), and K, B value can obtain according to experimental result
Arrive.
Step 2, refrigeration control device obtain the currency of discharge superheat according to the currency of outdoor unit coil temperature.
Wherein, the currency of discharge superheat subtracts outdoor unit coil temperature equal to delivery temperature.
Specifically, if the desired value of discharge superheat and the absolute value of difference of currency of discharge superheat are less than or equal to
Preset heat threshold value, then continue executing with step 3；If the desired value of discharge superheat and the difference of the currency of discharge superheat
Absolute value is more than preset heat threshold value, then continues executing with step 4.
It should be noted that the preset heat threshold value in the embodiment of the present invention can be configured when air conditioner dispatches from the factory,
For example, preset heat threshold value can be arranged to 3.
It is initial valve opening that step 3, refrigeration control device, which keep the aperture of outdoor unit electric expansion valve,.
Step 4, refrigeration control device obtain the currency of suction superheat and the desired value of suction superheat.
Wherein, the currency of suction superheat is equal to the temperature that suction temperature subtracts indoor coil.The mesh of suction superheat
The scope of scale value can be set according to the working condition of the air conditioner of reality, and the lower limit of the scope of the desired value of suction superheat is extremely
It is the value that can guarantee that the suction superheat that compressor is at least functioning in when recommending compression ratio less.The target of specific suction superheat
Value can determine according to the requirement of the air conditioner refrigerating ability of reality within the above range.Under normal circumstances, suction superheat is worked as
Value when being higher than 7, the cold medium flux in air conditioner can be influenceed, and then influence the refrigerating capacity of air conditioner；When suction superheat
When value is less than 0, liquid may occur back for air conditioner, and then influence the reliability of air conditioner.Therefore, it is however generally that, it will can inhale
The desired value of the gas degree of superheat is arranged to any one numerical value in the range of 0~7.
Specifically, if the currency of suction superheat is less than the desired value of suction superheat, step 5 is continued executing with；If
The currency of suction superheat is more than the desired value of suction superheat, then continues executing with step 6.
Step 5, refrigeration control device are using the default aperture for adjusting step number, tuning up outdoor unit electric expansion valve.
Step 6, refrigeration control device are using the default aperture for adjusting step number, turning outdoor unit electric expansion valve down.
In embodiments of the present invention, default regulation step number can be arranged to 2~10 steps.
It should be noted that step 1~6 are refrigeration control devices from being first by the aperture regulation of outdoor unit electric expansion valve
Beginning valve opening starts timing, after preset time, according to the aperture of machine electric expansion valve outside discharge superheat regulation room or
On the basis of the aperture of machine electric expansion valve outside discharge superheat regulation room, continue to adjust outdoor unit according to suction superheat
The aperture of electric expansion valve.It is of course also possible to refrigeration control device is from being initial by the aperture regulation of outdoor unit electric expansion valve
Valve opening starts timing, after preset time, only according to the aperture of machine electric expansion valve outside suction superheat regulation room.Specifically
Only according to can be to only carry out 4~6 in above-mentioned steps the step of the aperture of machine electric expansion valve outside suction superheat regulation room.
Refrigeration control method provided in an embodiment of the present invention, when air conditioner carries out cryogenic refrigeration (in the first preset temperature extremely
Freeze in the temperature range of second preset temperature) when, can be by the compressor operating frequency control of air conditioner in the first operation frequency
In rate section, and the outdoor machine fan of air conditioner is controlled using the rotation speed operation in the first rotating speed section.
With in the prior art, due to air conditioner when carrying out cryogenic refrigeration (i.e. outdoor environment temperature less than 0 DEG C) compressor
Compression ratio lasting reduction, when compressor compression ratio be less than compressor recommendation compression ratio when, it is impossible to ensure compressor
The reliability of even air conditioner complete machine is compared, due to the lower-frequency limit value in the first running frequency section and turning for the first rotating speed section
When fast higher limit is respectively that air conditioner freezes under the first preset temperature (limit value at a temperature of cryogenic refrigeration), it is ensured that compression
When the compression ratio of machine is at least recommendation compression ratio, the running frequency of compressor and the rotating speed of outdoor machine fan, and higher than above-mentioned
When being freezed in other temperature ranges of temperature upper limit value, the compression ratio of compressor is actually to be more than to limit at the temperature disclosed above
The compression ratio of compressor when being freezed under value；Therefore, when air conditioner is in the humidity province more than or equal to limit value at this temperature
Between when cryogenic refrigeration is carried out in (temperature range of the first preset temperature to the second preset temperature), if still controlling on compressor operating
Stating can ensure that the compression ratio of compressor is at least under the running frequency for recommending compression ratio, and control outdoor machine fan using above-mentioned
It can ensure that the compression ratio of compressor is at least the rotation speed operation for recommending compression ratio, then can at least ensure the compressor of compressor
To recommend compression ratio, you can to ensure the normal operation of compressor, thereby may be ensured that the reliability of compressor, and then improve
The possibility of air conditioner normal work during cryogenic refrigeration.
In embodiments of the present invention, by machine electric expansion valve outside further control room, the flow of refrigerant can be adjusted, is entered
One step ensures the refrigerating capacity of air conditioner.
Embodiment 3
The embodiment of the present invention provides a kind of refrigeration control device, as shown in figure 3, can include：Acquiring unit 31, first is controlled
The control unit 33 of unit 32 and second processed.
Acquiring unit 31, for obtaining the currency of outdoor environment temperature.
First control unit 32, the currency of the outdoor environment temperature for being obtained when acquiring unit 31 are default higher than first
Temperature, and when the currency of outdoor environment temperature is less than the second preset temperature, the compressor operating frequency control of air conditioner is existed
In first running frequency section；When the currency of outdoor environment temperature is higher than the second preset temperature, by the compressor of air conditioner
Running frequency is controlled in the second running frequency section；First preset temperature is less than the second preset temperature, and the first preset temperature is small
In 0 DEG C；The lower-frequency limit value in the second running frequency section is more than or equal to the upper frequency limit value in the first running frequency section.
Second control unit 33, the currency of the outdoor environment temperature for being obtained when acquiring unit 31 are default higher than first
Temperature, and when the currency of outdoor environment temperature is less than the second preset temperature, control the outdoor machine fan of air conditioner to use first
Rotation speed operation in rotating speed section；When the currency of outdoor environment temperature is higher than the second preset temperature, the room of air conditioner is controlled
Outer machine fan is using the rotation speed operation in the second rotating speed section；The rotating speed higher limit in the second rotating speed section is less than or equal to the first rotating speed
The lower rotation speed limit value in section.
Wherein, when the lower-frequency limit value in the first running frequency section is that air conditioner freezes under the first preset temperature, pressure is worked as
When the compression ratio of contracting machine is the recommendation compression ratio of compressor, the running frequency of compressor.
The rotating speed higher limit in the first rotating speed section is that air conditioner freezes under the first preset temperature, and the operation frequency of compressor
When rate is the lower-frequency limit value in the first running frequency section, when the compression ratio of compressor is the recommendation compression ratio of compressor, room
The rotating speed of outer machine fan.
Wherein, it is minimum compression ratio when compressor runs well to recommend compression ratio.
Further, as shown in figure 4, the first control unit 32 can include：Control of determination subelement 321 and first is single
Member 322.
Determination subelement 321, for determining the current refrigeration capacity of air conditioner.
First control subelement 322, required by the current refrigeration capacity for the air conditioner determined when determination subelement 321
When the running frequency of compressor is less than the lower-frequency limit value in the first running frequency section, the compressor of air conditioner is still controlled first
Run under the lower-frequency limit value in running frequency section.
Further, as shown in figure 5, the second control unit 33 can include：Adjust subelement 331, first and obtain son list
The control subelement 333 of member 332 and second.
Subelement 331 is adjusted, for by the rotational speed regulation of outdoor machine fan to preset rotation speed, and preset rotation speed is more than first
The lower rotation speed limit value in rotating speed section, preset rotation speed are less than the rotating speed higher limit in the first rotating speed section.
First obtains subelement 332, for obtaining the currency of outdoor unit coil temperature.
Second control subelement 333, if for the first currency for obtaining the outdoor unit coil temperature that subelement 332 obtains
More than default coil temperature, then outdoor machine fan is controlled to be transported using the rotating speed more than or equal to preset rotation speed in the first rotating speed section
Turn；If the currency of outdoor unit coil temperature is less than default coil temperature, control outdoor machine fan uses the first rotating speed section
The interior rotation speed operation less than or equal to preset rotation speed；If the currency of outdoor unit coil temperature is equal to default coil temperature, control
Outdoor machine fan processed is operated using preset rotation speed.
Further, as shown in fig. 6, refrigeration control device provided in an embodiment of the present invention, can also include：3rd control
Unit 34 and adjustment unit 35.
3rd control unit 34, for being higher than the first preset temperature, and outdoor environment when the currency of outdoor environment temperature
When the currency of temperature is less than the second preset temperature, keep outdoor unit electronic expansion valve opening be adjusted to initial valve opening continue it is pre-
If the time.
Adjustment unit 35, for after preset time, being continued according to discharge superheat or suction superheat outside regulation room
The aperture of machine electric expansion valve.
Further, as shown in fig. 7, adjustment unit 35 can include：Second obtains subelement 351, the first regulator list
The regulator unit 353 of member 352 and second.
Second obtains subelement 351, for the current operation frequency according to compressor, obtains the target of discharge superheat
Value；According to the currency of outdoor unit coil temperature, the currency of discharge superheat is obtained.
First regulator unit 352, if for the second desired value for obtaining the discharge superheat that subelement 351 obtains and the
The absolute value of the difference of the currency for the discharge superheat that two acquisition subelements 351 obtain is less than or equal to preset heat threshold value, then
The aperture for keeping outdoor unit electric expansion valve is initial valve opening.
Second regulator unit 353, if for the second desired value for obtaining the discharge superheat that subelement 351 obtains and the
The absolute value of the difference of the currency for the discharge superheat that two acquisition subelements 351 obtain is more than preset heat threshold value, then basis
Suction superheat continues the aperture of the outer machine electric expansion valve of regulation room.
Further, the second regulator unit 353, it is additionally operable to obtain the currency and suction superheat of suction superheat
Desired value；If the currency of suction superheat is less than the desired value of suction superheat, using default regulation step number, outdoor is tuned up
The aperture of machine electric expansion valve；If the currency of suction superheat is more than the desired value of suction superheat, using default regulation
Step number, turn the aperture of outdoor unit electric expansion valve down.
Further, the 3rd control unit 34, it is additionally operable to according to the first linear relationship, using the running frequency meter of compressor
Calculate the first valve opening of outdoor unit electric expansion valve；If the first valve opening is more than or equal to the second valve opening, by the first valve opening
It is defined as initial valve opening；If the first valve opening is less than the second valve opening, the second valve opening is defined as initial valve opening.
Further, the first preset temperature in the embodiment of the present invention can be -15 DEG C.
Further, as shown in figure 8, the refrigeration control device, can also include：4th control unit 36.
4th control unit 36, the currency of the outdoor environment temperature for being obtained when the acquiring unit 31 are less than
During first preset temperature, the air conditioner is controlled to enter shutdown mode.
Wherein, the shutdown mode includes：The shutdown mode of the air conditioner, or the park mode of the air conditioner.
It should be noted that the specific descriptions of part functional module can in refrigeration control device provided in an embodiment of the present invention
To be no longer described in detail here with reference to the corresponding content in previously described embodiment of the method, the present embodiment.
Refrigeration control device provided in an embodiment of the present invention, when air conditioner carries out cryogenic refrigeration (in the first preset temperature extremely
Freeze in the temperature range of second preset temperature) when, can be by the compressor operating frequency control of air conditioner in the first operation frequency
In rate section, and the outdoor machine fan of air conditioner is controlled using the rotation speed operation in the first rotating speed section.
With in the prior art, due to air conditioner when carrying out cryogenic refrigeration (i.e. outdoor environment temperature less than 0 DEG C) compressor
Compression ratio lasting reduction, when compressor compression ratio be less than compressor recommendation compression ratio when, it is impossible to ensure compressor
The reliability of even air conditioner complete machine is compared, due to the lower-frequency limit value in the first running frequency section and turning for the first rotating speed section
When fast higher limit is respectively that air conditioner freezes under the first preset temperature (limit value at a temperature of cryogenic refrigeration), it is ensured that compression
When the compression ratio of machine is at least recommendation compression ratio, the running frequency of compressor and the rotating speed of outdoor machine fan, and higher than above-mentioned
When being freezed in other temperature ranges of temperature upper limit value, the compression ratio of compressor is actually to be more than to limit at the temperature disclosed above
The compression ratio of compressor when being freezed under value；Therefore, when air conditioner is in the humidity province more than or equal to limit value at this temperature
Between when cryogenic refrigeration is carried out in (temperature range of the first preset temperature to the second preset temperature), if still controlling on compressor operating
Stating can ensure that the compression ratio of compressor is at least under the running frequency for recommending compression ratio, and control outdoor machine fan using above-mentioned
It can ensure that the compression ratio of compressor is at least the rotation speed operation for recommending compression ratio, then can at least ensure the compressor of compressor
To recommend compression ratio, you can to ensure the normal operation of compressor, thereby may be ensured that the reliability of compressor, and then improve
The possibility of air conditioner normal work during cryogenic refrigeration.
Embodiment 4
The embodiment of the present invention provides a kind of air conditioner, as shown in figure 9, can include：Memory 41 and processor 42.
Memory 41, for storing batch processing code.
Processor 42, for performing the program code stored in memory 41, specific for performing following operate：
Obtain the currency of outdoor environment temperature；When the currency of outdoor environment temperature is higher than the first preset temperature, and room
When the currency of external environment temperature is less than the second preset temperature, by the compressor operating frequency control of air conditioner in the first operation frequency
In rate section, and the outdoor machine fan of air conditioner is controlled using the rotation speed operation in the first rotating speed section；First preset temperature is low
In the second preset temperature, the first preset temperature is less than 0 DEG C；When the currency of outdoor environment temperature is higher than the second preset temperature,
The compressor operating frequency of air conditioner is controlled in the second running frequency section, and controls the outdoor machine fan of air conditioner to use
Rotation speed operation in second rotating speed section；The lower-frequency limit value in the second running frequency section is more than or equal to the first running frequency section
Upper frequency limit value, the rotating speed higher limit in the second rotating speed section is less than or equal to the lower rotation speed limit value in the first rotating speed section.
Further, as shown in Figure 10, the air conditioner in the embodiment of the present invention can also include：Temperature sensor 43.Place
Outdoor environment temperature and outdoor unit coil temperature can be obtained by temperature sensor 43 by managing device 42.Processor 41 can be center
Processor (Central Processing Unit, CPU) and digital signal processor (Digital Signal Processor,
DSP) etc..In embodiments of the present invention, CPU can be single arithmetic core, can also include multioperation core.
Memory 41 is connected by bus with processor 42 and completes mutual communication.It is total that the bus can be divided into data
Line and controlling bus etc..For ease of representing, bus only is represented with a thick line in Fig. 9 and Figure 10, it is not intended that only one
Bus or a type of bus.
Further, memory 41 mainly includes program storage area and data storage area.Wherein, program storage area can be deposited
The program code of each functional module of the air conditioner in the embodiment of the present invention is stored up, data storage area can store outdoor environment temperature
Currency, the first preset temperature, the second preset temperature, the first running frequency section, the first rotating speed section, compressor operation
Frequency, the rotating speed of outdoor machine fan and outdoor unit coil temperature etc..
Further, as shown in Figure 10, the air conditioner in the embodiment of the present invention can also include display screen 44 and power supply 45.
Display screen 44 can show current operation mode, indoor temperature, the running frequency of compressor and the outdoor machine fan of air conditioner
Rotating speed etc..
Air conditioner provided in an embodiment of the present invention, when air conditioner carries out cryogenic refrigeration (in the first preset temperature to second pre-
If freezing in the temperature range of temperature) when, the compressor operating frequency of air conditioner can be controlled in the first running frequency section
It is interior, and the outdoor machine fan of air conditioner is controlled using the rotation speed operation in the first rotating speed section.
With in the prior art, due to air conditioner when carrying out cryogenic refrigeration (i.e. outdoor environment temperature less than 0 DEG C) compressor
Compression ratio lasting reduction, when compressor compression ratio be less than compressor recommendation compression ratio when, it is impossible to ensure compressor
The reliability of even air conditioner complete machine is compared, due to the lower-frequency limit value in the first running frequency section and turning for the first rotating speed section
When fast higher limit is respectively that air conditioner freezes under the first preset temperature (limit value at a temperature of cryogenic refrigeration), it is ensured that compression
When the compression ratio of machine is at least recommendation compression ratio, the running frequency of compressor and the rotating speed of outdoor machine fan, and higher than above-mentioned
When being freezed in other temperature ranges of temperature upper limit value, the compression ratio of compressor is actually to be more than to limit at the temperature disclosed above
The compression ratio of compressor when being freezed under value；Therefore, when air conditioner is in the humidity province more than or equal to limit value at this temperature
Between when cryogenic refrigeration is carried out in (temperature range of the first preset temperature to the second preset temperature), if still controlling on compressor operating
Stating can ensure that the compression ratio of compressor is at least under the running frequency for recommending compression ratio, and control outdoor machine fan using above-mentioned
It can ensure that the compression ratio of compressor is at least the rotation speed operation for recommending compression ratio, then can at least ensure the compressor of compressor
To recommend compression ratio, you can to ensure the normal operation of compressor, thereby may be ensured that the reliability of compressor, and then improve
The possibility of air conditioner normal work during cryogenic refrigeration.
The description of embodiment above, it is apparent to those skilled in the art that, for the convenience of description
With it is succinct, can be as needed and by above-mentioned work(only with the division progress of above-mentioned each functional module for example, in practical application
It can distribute and be completed by different functional modules, i.e., the internal structure of device is divided into different functional modules, more than completion
The all or part of function of description.The specific work process of the system, apparatus, and unit of foregoing description, it may be referred to foregoing side
Corresponding process in method embodiment, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the module or
The division of unit, only a kind of division of logic function, can there are other dividing mode, such as multiple units when actually realizing
Or component can combine or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, institute
Display or the mutual coupling discussed or direct-coupling or communication connection can be by some interfaces, device or unit
INDIRECT COUPLING or communication connection, can be electrical, mechanical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part to be contributed in other words to prior art or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are causing a computer
It is each that equipment (can be personal computer, server, or network equipment etc.) or processor (processor) perform the present invention
The all or part of step of embodiment methods described.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage
(ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD
Etc. it is various can be with the medium of store program codes.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (19)
1. a kind of refrigeration control method, it is characterised in that applied to air conditioner, methods described includes：
Obtain the currency of outdoor environment temperature；
When the currency of the outdoor environment temperature is higher than the first preset temperature, and the currency of the outdoor environment temperature is less than
During the second preset temperature, the compressor operating frequency of the air conditioner is controlled in the first running frequency section, and control institute
The outdoor machine fan of air conditioner is stated using the rotation speed operation in the first rotating speed section；First preset temperature is less than described second
Preset temperature, first preset temperature are less than 0 DEG C；
When the currency of the outdoor environment temperature is higher than second preset temperature, by the compressor operating of the air conditioner
FREQUENCY CONTROL controls the outdoor machine fan of the air conditioner using in the second rotating speed section in the second running frequency section
Rotation speed operation；The lower-frequency limit value in the second running frequency section is more than or equal in the frequency in the first running frequency section
Limit value, the rotating speed higher limit in the second rotating speed section are less than or equal to the lower rotation speed limit value in the first rotating speed section；
When the lower-frequency limit value in the first running frequency section is that the air conditioner freezes under first preset temperature, when
When the compression ratio of the compressor is the recommendation compression ratio of the compressor, the running frequency of the compressor；
The rotating speed higher limit in the first rotating speed section is that the air conditioner freezes under first preset temperature, and the pressure
When the running frequency of contracting machine is the lower-frequency limit value in the first running frequency section, when the compression ratio of the compressor is described
During the recommendation compression ratio of compressor, the rotating speed of the outdoor machine fan；
Wherein, the recommendation compression ratio is the minimum compression ratio when compressor runs well.
2. refrigeration control method according to claim 1, it is characterised in that the compressor operating by the air conditioner
FREQUENCY CONTROL in the first running frequency section, including：
Determine the current refrigeration capacity of the air conditioner；
When the running frequency of the compressor required by the current refrigeration capacity of the air conditioner is less than first running frequency
During the lower-frequency limit value in section, the compressor of the air conditioner is still controlled in the lower-frequency limit value in the first running frequency section
Lower operation.
3. refrigeration control method according to claim 1, it is characterised in that the outdoor unit wind of the control air conditioner
Fan uses the rotation speed operation in the first rotating speed section, including：
By the rotational speed regulation of the outdoor machine fan to preset rotation speed, and the preset rotation speed is more than or equal to the first rotating speed area
Between lower rotation speed limit value, the preset rotation speed be less than or equal to the first rotating speed section rotating speed higher limit；
Obtain the currency of outdoor unit coil temperature；
If the currency of the outdoor unit coil temperature is more than default coil temperature, control described in the outdoor machine fan use
The rotation speed operation more than or equal to the preset rotation speed in first rotating speed section；
If the currency of the outdoor unit coil temperature is less than the default coil temperature, the outdoor machine fan is controlled to use
The rotation speed operation less than or equal to the preset rotation speed in the first rotating speed section；
If the currency of the outdoor unit coil temperature is equal to the default coil temperature, the outdoor machine fan is controlled to use
The preset rotation speed operating.
4. refrigeration control method according to claim 1, it is characterised in that also include：
When the currency of the outdoor environment temperature is higher than first preset temperature, and the currency of the outdoor environment temperature
During less than second preset temperature, keep the outdoor unit electronic expansion valve opening be adjusted to initial valve opening persistently preset when
Between；
After the preset time, continued to adjust the outdoor unit electric expansion valve according to discharge superheat or suction superheat
Aperture.
5. refrigeration control method according to claim 4, it is characterised in that described to be continued to adjust institute according to discharge superheat
The aperture of outdoor unit electric expansion valve is stated, including：
According to the current operation frequency of the compressor, the desired value of the discharge superheat is obtained；According to the outdoor unit disk
The currency of pipe temperature, obtain the currency of the discharge superheat；
If the absolute value of the difference of the currency of the desired value of the discharge superheat and the discharge superheat is less than or equal to pre-
If heat degree threshold, then the aperture for keeping the outdoor unit electric expansion valve is the initial valve opening；
If the absolute value of the difference of the currency of the desired value of the discharge superheat and the discharge superheat is more than described pre-
If heat degree threshold, then continued to adjust the aperture of the outdoor unit electric expansion valve according to the suction superheat.
6. refrigeration control method according to claim 5, it is characterised in that described to continue to adjust according to the suction superheat
The aperture of the outdoor unit electric expansion valve is saved, including：
Obtain the currency of the suction superheat and the desired value of the suction superheat；
If the currency of the suction superheat is less than the desired value of the suction superheat, using default regulation step number, adjust
The aperture of the big outdoor unit electric expansion valve；
If the currency of the suction superheat is more than the desired value of the suction superheat, using the default regulation step
Number, turn the aperture of the outdoor unit electric expansion valve down.
7. refrigeration control method according to claim 4, it is characterised in that it is determined that initial valve opening, including：
According to the first linear relationship, the first valve of the outdoor unit electric expansion valve is calculated using the running frequency of the compressor
Aperture；
If first valve opening is more than or equal to the second valve opening, first valve opening is defined as the initial valve and opened
Degree；
If first valve opening is less than second valve opening, second valve opening is defined as the initial valve and opened
Degree.
8. refrigeration control method according to claim 1, it is characterised in that first preset temperature is -15 DEG C.
9. refrigeration control method according to claim 1, it is characterised in that also include：
When the currency of the outdoor environment temperature is less than first preset temperature, controls the air conditioner to enter and shut down mould
Formula；
Wherein, the shutdown mode includes：The shutdown mode of the air conditioner, or the park mode of the air conditioner.
A kind of 10. refrigeration control device, it is characterised in that including：
Acquiring unit, for obtaining the currency of outdoor environment temperature；
First control unit, the currency of the outdoor environment temperature for being obtained when the acquiring unit are default higher than first
Temperature, and when the currency of the outdoor environment temperature is less than the second preset temperature, by the compressor operating frequency control of air conditioner
System is in the first running frequency section；When the currency of the outdoor environment temperature is higher than second preset temperature, by institute
The compressor operating frequency for stating air conditioner is controlled in the second running frequency section；First preset temperature is less than described second
Preset temperature, first preset temperature are less than 0 DEG C；The lower-frequency limit value in the second running frequency section is more than or equal to described
The upper frequency limit value in the first running frequency section；
Second control unit, the currency of the outdoor environment temperature for being obtained when the acquiring unit are higher than described first
Preset temperature, and when the currency of the outdoor environment temperature is less than second preset temperature, control the room of the air conditioner
Outer machine fan is using the rotation speed operation in the first rotating speed section；When the currency of the outdoor environment temperature is pre- higher than described second
If during temperature, the outdoor machine fan of the air conditioner is controlled using the rotation speed operation in the second rotating speed section；Second rotating speed
The rotating speed higher limit in section is less than or equal to the lower rotation speed limit value in the first rotating speed section；
When the lower-frequency limit value in the first running frequency section is that the air conditioner freezes under first preset temperature, when
When the compression ratio of the compressor is the recommendation compression ratio of the compressor, the running frequency of the compressor；
The rotating speed higher limit in the first rotating speed section is that the air conditioner freezes under first preset temperature, and the pressure
When the running frequency of contracting machine is the lower-frequency limit value in the first running frequency section, when the compression ratio of the compressor is described
During the recommendation compression ratio of compressor, the rotating speed of the outdoor machine fan；
Wherein, the recommendation compression ratio is the minimum compression ratio when compressor runs well.
11. refrigeration control device according to claim 10, it is characterised in that first control unit, including：
Determination subelement, for determining the current refrigeration capacity of the air conditioner；
First control subelement, for the institute required by the current refrigeration capacity of the air conditioner determined when the determination subelement
When stating the running frequency of compressor and being less than the lower-frequency limit value in the first running frequency section, the pressure of the air conditioner is still controlled
Contracting machine is run under the lower-frequency limit value in the first running frequency section.
12. refrigeration control device according to claim 10, it is characterised in that second control unit, including：
Subelement is adjusted, for by the rotational speed regulation of the outdoor machine fan to preset rotation speed, and the preset rotation speed is more than institute
The lower rotation speed limit value in the first rotating speed section is stated, the preset rotation speed is less than the rotating speed higher limit in the first rotating speed section；
First obtains subelement, for obtaining the currency of outdoor unit coil temperature；
Second control subelement, if the currency that the outdoor unit coil temperature that subelement obtains is obtained for described first is big
In default coil temperature, then the outdoor machine fan is controlled to be more than or equal to described default turn using in the first rotating speed section
The rotation speed operation of speed；If the currency of the outdoor unit coil temperature is less than the default coil temperature, the outdoor is controlled
Machine fan is using the rotation speed operation less than or equal to the preset rotation speed in the first rotating speed section；If the outdoor unit coil pipe
The currency of temperature is equal to the default coil temperature, then controls the outdoor machine fan to be operated using the preset rotation speed.
13. refrigeration control device according to claim 10, it is characterised in that also include：
3rd control unit, for being higher than first preset temperature, and the room when the currency of the outdoor environment temperature
When the currency of external environment temperature is less than second preset temperature, the outdoor unit electronic expansion valve opening is kept to be adjusted to just
Beginning valve opening continues preset time；
Adjustment unit, for after the preset time, being continued to adjust the room according to discharge superheat or suction superheat
The aperture of outer machine electric expansion valve.
14. refrigeration control device according to claim 13, it is characterised in that the adjustment unit, including：
Second obtains subelement, for the current operation frequency according to the compressor, obtains the target of the discharge superheat
Value；According to the currency of the outdoor unit coil temperature, the currency of the discharge superheat is obtained；
First regulator unit, if obtaining the desired value of the discharge superheat that subelement obtains and described for described second
The absolute value of the difference of the currency for the discharge superheat that second acquisition subelement obtains is less than or equal to preset heat threshold value,
The aperture for then keeping the outdoor unit electric expansion valve is the initial valve opening；
Second regulator unit, if obtaining the desired value of the discharge superheat that subelement obtains and described for described second
The absolute value of the difference of the currency for the discharge superheat that second acquisition subelement obtains is more than the preset heat threshold value,
Then continued to adjust the aperture of the outdoor unit electric expansion valve according to the suction superheat.
15. refrigeration control device according to claim 14, it is characterised in that second regulator unit is specific to use
In the currency and the desired value of the suction superheat that obtain the suction superheat；If the currency of the suction superheat
Less than the desired value of the suction superheat, then using the default aperture for adjusting step number, tuning up the outdoor unit electric expansion valve；
If the currency of the suction superheat is more than the desired value of the suction superheat, using the default regulation step number, adjust
The aperture of the small outdoor unit electric expansion valve.
16. refrigeration control device according to claim 13, it is characterised in that the 3rd control unit, be additionally operable to by
According to the first linear relationship, the first valve opening of the outdoor unit electric expansion valve is calculated using the running frequency of the compressor；
If first valve opening is more than or equal to the second valve opening, first valve opening is defined as the initial valve opening；If
First valve opening is less than second valve opening, then second valve opening is defined as into the initial valve opening.
17. refrigeration control device according to claim 10, it is characterised in that first preset temperature is -15 DEG C.
18. refrigeration control device according to claim 10, it is characterised in that also include：
4th control unit, the currency of the outdoor environment temperature for being obtained when the acquiring unit are less than described first
During preset temperature, the air conditioner is controlled to enter shutdown mode；
Wherein, the shutdown mode includes：The shutdown mode of the air conditioner, or the park mode of the air conditioner.
A kind of 19. air conditioner, it is characterised in that including：
Memory, for storing batch processing code；
Processor, for performing the program code stored in the memory, specific for performing following operate：
Obtain the currency of outdoor environment temperature；
When the currency of the outdoor environment temperature is higher than the first preset temperature, and the currency of the outdoor environment temperature is less than
During the second preset temperature, the compressor operating frequency of the air conditioner is controlled in the first running frequency section, and control institute
The outdoor machine fan of air conditioner is stated using the rotation speed operation in the first rotating speed section；First preset temperature is less than described second
Preset temperature, first preset temperature are less than 0 DEG C；
When the currency of the outdoor environment temperature is higher than second preset temperature, by the compressor operating of the air conditioner
FREQUENCY CONTROL controls the outdoor machine fan of the air conditioner using in the second rotating speed section in the second running frequency section
Rotation speed operation；The lower-frequency limit value in the second running frequency section is more than or equal in the frequency in the first running frequency section
Limit value, the rotating speed higher limit in the second rotating speed section are less than or equal to the lower rotation speed limit value in the first rotating speed section；
When the lower-frequency limit value in the first running frequency section is that the air conditioner freezes under first preset temperature, when
When the compression ratio of the compressor is the recommendation compression ratio of the compressor, the running frequency of the compressor；
The rotating speed higher limit in the first rotating speed section is that the air conditioner freezes under first preset temperature, and the pressure
When the running frequency of contracting machine is the lower-frequency limit value in the first running frequency section, when the compression ratio of the compressor is described
During the recommendation compression ratio of compressor, the rotating speed of the outdoor machine fan；
Wherein, the recommendation compression ratio is the minimum compression ratio when compressor runs well.
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| CN201410367322.XA CN105333563B (en) | 2014-07-29 | 2014-07-29 | A kind of refrigeration control method, device and air conditioner |
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| CN201410367322.XA CN105333563B (en) | 2014-07-29 | 2014-07-29 | A kind of refrigeration control method, device and air conditioner |
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Address after: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Patentee after: Hisense Air Conditioning Co.,Ltd. Address before: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Patentee before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd. |
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Effective date of registration: 20220914 Address after: 528000 No. 8 Rongguirong Port Road, Shunde District, Foshan City, Guangdong Province Patentee after: Guangdong Kelong Jiake Electronics Co.,Ltd. Address before: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Patentee before: Hisense Air Conditioning Co.,Ltd. |