CN106895622B - Compressor start method and device for frequency conversion equipment - Google Patents
Compressor start method and device for frequency conversion equipment Download PDFInfo
- Publication number
- CN106895622B CN106895622B CN201710075129.2A CN201710075129A CN106895622B CN 106895622 B CN106895622 B CN 106895622B CN 201710075129 A CN201710075129 A CN 201710075129A CN 106895622 B CN106895622 B CN 106895622B
- Authority
- CN
- China
- Prior art keywords
- frequency
- compressor
- test
- adjusted
- interval
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/26—Problems to be solved characterised by the startup of the refrigeration cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0251—Compressor control by controlling speed with on-off operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/17—Speeds
- F25B2700/171—Speeds of the compressor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2104—Temperatures of an indoor room or compartment
Abstract
The present invention discloses a kind of compressor start method for frequency conversion equipment, which comprises receives set temperature, and according to set temperature and indoor and outdoor surroundings temperature, obtains the target frequency of compressor operation；The minimum rated frequency and maximum rated frequency of compressor are obtained, and using the section between minimum rated frequency and target frequency as first interval, the section between target frequency and maximum rated frequency is as second interval；At least one frequency is selected from first interval and/or second interval as test frequency, and compressor frequency is adjusted to test frequency operation；After compressor runs preset duration with test frequency, compressor frequency is adjusted to target frequency operation by test frequency.To realize the quick start of compressor, avoids compressor and just run after each frequency plateau runs setting time with target frequency, reduce the starting time of system.The invention also discloses a kind of compressor start devices for frequency conversion equipment.
Description
Technical field
The invention mainly relates to the compressor start technical fields for frequency conversion equipment, specifically, more particularly to a kind of
Compressor start method and device thereof for frequency conversion equipment.
Background technique
With popularizing for converter technique, the equipment of the application converter technique such as air-conditioning, refrigerator is more and more, and converter technique can be shown
Write the integration capability efficiency for improving frequency conversion equipment.Frequency conversion equipment is different more by frequency partition height according to its variable frequency range
A grade needs the frequency plateau in each formulation from low to high to run one section in the compressor start for frequency conversion equipment
Setting time, for guaranteeing system reliability of operation.This increases the starting time of system to a certain extent, affects
The cooling and warming ability of startup stage.
Summary of the invention
The main purpose of the present invention is to provide a kind of compressors for frequency conversion equipment to start method and device, it is intended to solve
It is certainly used for the problem of the compressor start time length of frequency conversion equipment in the prior art.
To achieve the above object, the present invention provides a kind of compressor starting method for frequency conversion equipment, described for becoming
Frequency equipment compressor starting method the following steps are included:
Set temperature is received, and according to set temperature and indoor and outdoor surroundings temperature, obtains the target frequency of compressor operation；
The minimum rated frequency and maximum rated frequency of compressor are obtained, and will be between minimum rated frequency and target frequency
Section as first interval, the section between target frequency and maximum rated frequency is as second interval；
At least one frequency is selected from first interval and/or second interval as test frequency, and by compressor frequency
It is adjusted to test frequency operation；
After compressor runs preset duration with test frequency, compressor frequency is adjusted to target frequency by test frequency
Operation.
Preferably, described at least one frequency of selecting from first interval and/or second interval is as test frequency, and incites somebody to action
Compressor frequency be adjusted to test frequency operation the step of include:
Using the biggish section of frequency range in first interval and second interval as section to be tested；
At least one frequency is selected from section to be tested as test frequency, and compressor frequency is adjusted to test frequency
Rate operation.
Preferably, described the step of compressor frequency is adjusted to test frequency operation, includes:
Adjust bypath valve aperture according to bypath valve regulating command, and according to the aperture of bypath valve, determine exhaust and
The pressure difference of return-air；
According to the pressure difference of exhaust and return-air, the frequency modulation speed of compressor is determined, and by compressor frequency with the frequency modulation
Speed is adjusted to test frequency operation.
Preferably, described after compressor runs preset duration with test frequency, by compressor frequency by test frequency tune
Whole is that the step of target frequency is run includes:
After compressor runs preset duration with test frequency, bypath valve gradually out code is received；
When the frequency of compressor is adjusted to target frequency by test frequency, by-passing valve is completely closed, and controls compression
Machine is run with target frequency.
Preferably, described after compressor runs preset duration with test frequency, by compressor frequency by test frequency tune
Include: after the step of whole operation for target frequency
Detect compressor exhaust temperature；
According to target frequency and compressor exhaust temperature, throttling set aperture is adjusted, to ensure compressor stable operation.
In addition, to achieve the above object, the present invention also proposes a kind of compressor start device for frequency conversion equipment, described
Compressor start device for frequency conversion equipment includes:
First obtains module, for receiving set temperature, and according to set temperature and indoor and outdoor surroundings temperature, obtains compression
The target frequency of machine operation；
Second obtains module, for obtaining the minimum rated frequency and maximum rated frequency of compressor, and will be minimum specified
Section between frequency and target frequency is as first interval, and the section between target frequency and maximum rated frequency is as second
Section；
Choosing module, for selecting at least one frequency from first interval and/or second interval as test frequency, and
Compressor frequency is adjusted to test frequency operation；
Module is adjusted, is used for after compressor runs preset duration with test frequency, by compressor frequency by test frequency
It is adjusted to target frequency operation.
Preferably, the Choosing module includes:
First control unit, for using the biggish section of frequency range in first interval and second interval as area to be tested
Between；
The first adjustment unit, for selecting at least one frequency from section to be tested as test frequency, and will compression
Unit frequency is adjusted to test frequency operation.
Preferably, the Choosing module further include:
Determination unit, for adjusting bypath valve aperture, and opening according to bypath valve according to bypath valve regulating command
Degree determines the pressure difference of exhaust and return-air；
Second adjustment unit determines the frequency modulation speed of compressor for the pressure difference according to exhaust and return-air, and will compression
Unit frequency is adjusted to test frequency operation with the frequency modulation speed.
Preferably, the adjustment module includes:
Receiving unit refers to for after compressor runs preset duration with test frequency, receiving bypath valve and gradually closing
It enables；
Second control unit, it is for when the frequency of compressor is adjusted to target frequency by test frequency, by-passing valve is complete
Contract fully, and control compressor and run with target frequency.
Preferably, the compressor start device for frequency conversion equipment further include:
Detection module, for detecting compressor exhaust temperature；
Adjustment module, for throttling set aperture being adjusted, to ensure to compress according to target frequency and compressor exhaust temperature
Machine stable operation.
Compressor start method proposed by the present invention for frequency conversion equipment, passes through set temperature based on the received and interior
External environment temperature obtains the target frequency of compressor operation；And it will be between the minimum rated frequency and target frequency of compressor
Section as first interval, section between target frequency and maximum rated frequency as second interval, from first interval and/or
At least one frequency is selected in second interval as test frequency, and frequency is adjusted to test frequency to control compressor, and
With the operation of this test frequency, to determine the stability and reliability of compressor operation；It is pre- with the operation of this test frequency in compressor
If after duration, test frequency is adjusted to target frequency, and run with target frequency.And then realize quickly opening for compressor
It is dynamic, it avoids compressor and is just run after each frequency plateau runs setting time with target frequency, reduce the starting of system
Time.
Detailed description of the invention
Fig. 1 is the flow diagram of the compressor start method first embodiment for frequency conversion equipment of the invention；
Fig. 2 is the flow diagram of the compressor start method second embodiment for frequency conversion equipment of the invention；
Fig. 3 is the functional block diagram of the compressor start device first embodiment for frequency conversion equipment of the invention；
Fig. 4 is the refinement function of the Choosing module of the compressor start device second embodiment for frequency conversion equipment of the invention
It can module diagram；
Fig. 5 is the refinement function of the Choosing module of the compressor start device 3rd embodiment for frequency conversion equipment of the invention
It can module diagram；
Fig. 6 is the refinement function of the adjustment module of the compressor start device fourth embodiment for frequency conversion equipment of the invention
It can module diagram；
Fig. 7 is the functional block diagram of the 5th embodiment of compressor start device for frequency conversion equipment of the invention；
Fig. 8 is the hardware connection diagram of the compressor start method and device for frequency conversion equipment of the invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of compressor start method for frequency conversion equipment, referring to Fig.1, in one embodiment, the use
In frequency conversion equipment compressor start method the following steps are included:
Step S10 receives set temperature, and according to set temperature and indoor and outdoor surroundings temperature, obtains compressor operation
Target frequency；
The compressor start method for being used for frequency conversion equipment is provided in the present embodiment, is primarily adapted for use in convertible frequency air-conditioner, frequency conversion ice
The frequency conversion equipments such as case.Understandably, the demand temperature using user to frequency conversion equipment of different frequency conversion equipments is different, specifically
Temperature setting can be carried out according to demand.Frequency conversion equipment is influenced by the ambient temperature locating for it simultaneously, when set temperature and outer
The difference of boundary's environment temperature is bigger, and it is more to reach the acting of set temperature that frequency conversion equipment overcomes ambient temperature；Conversely, setting
The difference for determining temperature and ambient temperature is smaller, then acting required for frequency conversion equipment is fewer.So being arranged on frequency conversion equipment
There is the detection device of detection temperature, the detection device can be temperature sensor.When receiving set temperature, frequency conversion equipment is opened
Dynamic temperature sensor detects indoor environment temperature and outdoor environment temperature, according to set temperature, indoor environment temperature and outdoor
Environment temperature determines the target frequency of compressor operation.The target frequency is to reach set temperature, the operation frequency of compressor
Rate.Simultaneously also according to this target frequency, compressor can run maximum, minimum frequency and maximum, the minimum aperture of throttling set is true
Determine throttling set initial opening.Flow section sudden contraction, fluid flow rate add when throttling set is by the way that refrigerant is flowed through valve
Fastly, pressure declines, and to realize reducing pressure by regulating flow and adjust the function of flow, the size of pressure decline is shunk depending on flow section
Ratio.Throttling set initial opening is determined according to target frequency in the present embodiment, throttling set when being used for compressor start
Refrigerant is conveyed with this aperture.Target frequency is bigger, and the initial opening of throttling set is bigger.
Step S20, obtains the minimum rated frequency and maximum rated frequency of compressor, and by minimum rated frequency and target
Section between frequency is as first interval, and the section between target frequency and maximum rated frequency is as second interval；
Understandably, in order to realize that different set temperatures, the running frequency of compressor are also different.In order to meet compressor
Normally, the minimum value and maximum value under the conditions of continuous work, compressor are provided with minimum rated frequency and maximum rated frequency, pressure
Frequency when contracting machine continuously works normally must be in the section between minimum rated frequency and maximum rated frequency.The present embodiment
In, the area using the section between minimum rated frequency and target frequency as first interval, between target frequency and maximum frequency
Between be used as second interval.
Step S30 selects at least one frequency as test frequency from first interval and/or second interval, and will pressure
Contracting unit frequency is adjusted to test frequency operation；
The present embodiment starts compressor with throttling set initial opening and opens fortune after the target frequency for obtaining compressor
Row.In order to ensure the stability and reliability of compressor operation, at least one frequency is selected from first interval or second interval
Rate selects at least one frequency as test frequency as test frequency, or from first interval and second interval, and will pressure
The frequency of contracting machine is adjusted to the operation of this test frequency.Specifically, then test frequency is low when test frequency is located at first interval
In the first test frequency of target frequency；When test frequency is located at second interval, then test frequency is higher than target frequency
Second test frequency.In one embodiment, compressor obtains compressor operation according to set temperature and indoor and outdoor surroundings temperature
Target frequency is 60HZ, and the variable frequency range of compressor is 30-130HZ, then this first test frequency can be between 30-60HZ
Arbitrary value, the second test frequency can arbitrary values between 60-130HZ.After picking out test frequency, control compressor with
The operation of this test frequency.When being higher than 120 DEG C because of compressor exhaust temperature, compressor meeting stoppage protection, so in compressor to survey
During trying frequency operation, compressor exhaust temperature need to be detected, to prevent compressor exhaust temperature is excessively high from causing to stop
Machine.Understandably, when throttling set aperture increases, cold medium flux increases, so that delivery temperature is reduced, according to the compression of detection
Machine delivery temperature and test frequency adjust throttling set aperture, to prevent compressor shutdown while ensuring test frequency operation.
Compressor frequency is adjusted to by step S40 after compressor runs preset duration with test frequency by test frequency
Target frequency operation.
Further, control compressor runs preset duration with test frequency, when preset duration is pre-set one section
Between, it can be 1S or 2S, be run in this preset time period with test frequency, to ensure the stability of compressor operation and reliable
Property.It, need to be by its running frequency by test frequency in order to reach preset temperature after compressor runs preset duration with test frequency
It is adjusted to target frequency.Understandably, it according to set temperature and indoor and outdoor surroundings temperature, determines and turns current indoor environment temperature
Fade to cold medium flux required for set temperature.When set temperature and big indoor and outdoor surroundings temperature difference, required refrigerant
It measures more, it is desirable that compressor frequency increases, to accelerate the conveying of refrigerant；When set temperature and indoor and outdoor surroundings temperature difference are little
When, required coolant quantity is few accordingly, and the lower frequency of compressor, which can be realized, achievees the purpose that set temperature.The present embodiment
In, because set temperature is a determining value, i.e., current indoor environment temperature is converted to refrigerant stream required for set temperature
An also determining value is measured, when test frequency is located at first interval, i.e., when test frequency is lower than target frequency, in order to arrive
Up to test frequency, the running frequency of compressor need to be increased to target frequency, i.e. conveying of the compressor to refrigerant by test frequency
Amount increases.When test frequency is located at second interval, i.e., test frequency is higher than target frequency, in order to reach test frequency, need by
The running frequency of compressor is reduced to target frequency by test frequency, i.e. compressor reduces the conveying capacity of refrigerant, so in order to
It realizes set temperature, needs to adjust throttling set aperture according to target frequency.Similarly, in frequency adjustment procedure, detection pressure
Contracting machine delivery temperature, to prevent the excessively high stoppage protection of compressor exhaust temperature.It, can when detecting that compressor exhaust temperature is excessively high
By the way that the increased mode of throttling set aperture is reduced delivery temperature.In summary, in compressor frequency by test frequency tune
It is whole to during target frequency, throttling set aperture is adjusted according to target frequency and compressor exhaust temperature, to ensure compressor
Compressor shutdown is prevented while operation with target frequency, guarantees the stable operation of compressor.
The compressor start method for frequency conversion equipment of the present embodiment is the following steps are included: receive set temperature, and root
According to set temperature and indoor and outdoor surroundings temperature, the target frequency of compressor operation is obtained；Obtain the minimum rated frequency of compressor
With maximum rated frequency, and using the section between minimum rated frequency and target frequency as first interval, target frequency and most
Section between big rated frequency is as second interval；At least one frequency is selected from from first interval and/or second interval
Test frequency operation is adjusted to as test frequency, and by compressor frequency；Preset duration is run with test frequency in compressor
Afterwards, compressor frequency is adjusted to target frequency operation by test frequency.This programme passes through set temperature and room based on the received
Internal and external environment temperature obtains the target frequency of compressor operation；It is adjusted to control compressor less or greater than target frequency
The test frequency of rate, and with the operation of this test frequency, to determine the stability and reliability of compressor operation；In compressor with this
After test frequency runs preset duration, then test frequency adjusted to target frequency, and is run with target frequency.Simultaneously in frequency
Compressor exhaust temperature is detected during adjustment, to adjust throttling set aperture according to compressor exhaust temperature and target frequency,
It prevents compressor shutdown from protecting while ensuring to realize target frequency operation, guarantees the stable operation of system.Realize compressor
Quick start, avoid compressor and just run after each frequency plateau runs setting time with target frequency, reduce and be
The starting time of system.
Further, at least one frequency is selected described in step S30 from first interval and/or second interval as test
Frequency, and the step of compressor frequency is adjusted to test frequency operation includes:
Step S31, using the biggish section of frequency range in first interval and second interval as section to be tested；
Step S32 selects at least one frequency from section to be tested and adjusts as test frequency, and by compressor frequency
It is run to test frequency.
Further, in the embodiment of the present invention, the variable frequency range of compressor is minimum rated frequency to maximum
Determine the frequency separation between frequency.The target frequency of compressor is not necessarily the median of variable frequency range, i.e. first interval
It is not necessarily identical with the frequency range of second interval.When first interval and not identical second interval frequency range, by frequency model
Biggish section is enclosed as section to be tested.At least one frequency is selected from the biggish section to be tested of frequency range as survey
Frequency is tried, and compressor frequency is adjusted to test frequency operation.With the biggish section of test frequency range, make test result more
It is accurate.Compressor start runing time can be reduced by selecting at least one frequency and carrying out test as test frequency, in order into one
Step ensures that the stabilization of compressor is accurately run, and can also select multiple frequencies as test frequency and test respectively.
Further, the step of compressor frequency being adjusted to test frequency operation described in step S30 further include:
Step S33 adjusts bypath valve aperture according to bypath valve regulating command, and according to the aperture of bypath valve, really
The pressure difference of fixed exhaust and return-air；
Step S34 determines the frequency modulation speed of compressor according to the pressure difference of exhaust and return-air, and by compressor frequency with
The frequency modulation speed is adjusted to test frequency operation.
Further, it is applied in example of the invention real one, please refers to Fig. 8, set on the return-air and exhaust line of compressor
It is equipped with by-passing valve and pressure sensor, 8,1 is compressor in figure, 2 is indoor unit, 3 is throttling set, 4 is condenser, 5 is other
Port valve door, 6 be four-way valve, 7 be pressure sensor, 8 be gas-liquid separator.By-passing valve is for balancing compressor vapor return line and row
The pressure of gas pipeline, pressure sensor is for detecting vapor return line pressure and exhaust line pressure.Specifically, bypath valve aperture
It is adjustable, compressor may be jeopardized when pressure sensor detects that the pressure difference between vapor return line and exhaust line is larger
When, increase bypath valve aperture, to reduce pressure difference protection compressor.The frequency modulation speed of compressor is vented with it and back pressure
Poor related, exhaust and back pressure difference are big, and compressor frequency modulation speed is slow, and exhaust and back pressure difference are small, compressor frequency modulation speed
Fastly.After the target frequency for obtaining compressor operation, bypath valve is opened, pressure sensor detects the pressure of exhaust line and returns
The pressure of gas pipeline determines the pressure difference of exhaust and return-air, to determine compressor frequency modulation speed according to the pressure difference.It can
Understand ground, in compressor frequency-modulating process, influenced by extraneous factor, may cause exhaust and back pressure difference becomes larger, influences
To compressor operating.When detecting that exhaust and back pressure difference become larger, that is, increase bypath valve aperture, to reduce exhaust and return
The pressure difference of gas, to ensure the even running of compressor.In the pressure difference according to exhaust and return-air, compressor frequency modulation speed is determined
Afterwards, compressor is controlled with compressor frequency modulation speed making frequency adjustment.Compressor frequency modulation speed is big, and compressor is tuned to test frequency
Rate the time it takes is shorter, can be faster be tuned to test frequency；Correspondingly, compressor frequency modulation speed is small, it is tuned to survey
It is slower to try frequency.After compressor is tuned to test frequency, that is, stop compressor frequency modulation, and with the operation of this test frequency.
Further, described in step S40 after compressor runs preset duration with test frequency, by compressor frequency by surveying
Examination frequency is adjusted to the step of target frequency is run
Step S41 receives bypath valve gradually out code after compressor runs preset duration with test frequency；
Step S42 completely closes by-passing valve when the frequency of compressor is adjusted to target frequency by test frequency, and
Control compressor is run with target frequency.
In the present embodiment, after compressor is tuned to test frequency, preset duration is run with test frequency, presets it herein
In, compressor can even running, then illustrate compressor runnability stablize.When compressor is default with test frequency operation
Between after, in order to realize set temperature, need by test frequency to adjust the frequency of compressor to target corresponding with set temperature
Frequency.The frequency modulation speed that compressor is determined according to exhaust and back pressure difference, because exhaust and back pressure difference are influenced by by-passing valve,
After compressor runs preset time with test frequency, bypath valve need to be closed.It is stable to guarantee, using certain speed
Degree gradually closes this bypath valve, and wherein closing velocity can be used piecewise function mode and change step by step.Receive bypath valve pass
Instruction is closed gradually to close bypath valve in a manner of piecewise function, after compressor test frequency is adjusted to target frequency,
Bypath valve completely closes, and with the operation of this target frequency.
Further, referring to figure 2., the base in the present invention for the compressor start method first embodiment of frequency conversion equipment
On plinth, the second embodiment of the compressor start method for frequency conversion equipment is proposed, it is in a second embodiment, described in compressor
After running preset duration with test frequency, compressor frequency is adjusted to wrap after the step of target frequency is run by test frequency
It includes:
Step S50 detects compressor exhaust temperature；
Step S60 adjusts throttling set and opens according to target frequency and compressor exhaust temperature, to ensure that compressor is stablized
Operation.
In the present embodiment, after compressor is run with target frequency, in fact it could happen that compressor exhaust temperature is excessively high to be caused to press
The problem of contracting machine stoppage protection.So the delivery temperature of compressor is detected, according to pressure when compressor is run with target frequency
Contracting machine delivery temperature adjusts throttling set aperture.Specifically, when detecting that compressor exhaust temperature is excessively high, increase throttling dress
Aperture is set, is increased as throttling set aperture increases cold medium flux, to reduce delivery temperature.Avoid compressor exhaust temperature
It is excessively high that compressor shutdown is caused to run, it ensure that the stable operation of compressor.
The present invention also provides a kind of compressor start devices for frequency conversion equipment, referring to Fig. 3, in one embodiment, this
Inventing the compressor start device for frequency conversion equipment provided includes:
First obtains module 10, for receiving set temperature, and according to set temperature and indoor and outdoor surroundings temperature, obtains pressure
The target frequency of contracting machine operation；
The compressor start device for being used for frequency conversion equipment is provided in the present embodiment, is primarily adapted for use in convertible frequency air-conditioner, frequency conversion ice
The frequency conversion equipments such as case.Understandably, the demand temperature using user to frequency conversion equipment of different frequency conversion equipments is different, specifically
Temperature setting can be carried out according to demand.Frequency conversion equipment is influenced by the ambient temperature locating for it simultaneously, when set temperature and outer
The difference of boundary's environment temperature is bigger, and it is more to reach the acting of set temperature that frequency conversion equipment overcomes ambient temperature；Conversely, setting
The difference for determining temperature and ambient temperature is smaller, then acting required for frequency conversion equipment is fewer.So being arranged on frequency conversion equipment
There is the detection device of detection temperature, the detection device can be temperature sensor.When receiving set temperature, frequency conversion equipment is opened
Dynamic temperature sensor detects indoor environment temperature and outdoor environment temperature, according to set temperature, indoor environment temperature and outdoor
Environment temperature, first obtains the target frequency that module 10 determines compressor operation.The target frequency is to reach set temperature, is pressed
The running frequency of contracting machine.Simultaneously also according to this target frequency, compressor can run maximum, minimum frequency and throttling set most
Greatly, minimum aperture determines throttling set initial opening.Flow section is received suddenly when throttling set is by the way that refrigerant is flowed through valve
Contracting, fluid flow rate are accelerated, pressure decline, and to realize reducing pressure by regulating flow and adjust the function of flow, the size of pressure decline depends on
In the ratio that flow section is shunk.Throttling set initial opening is determined according to target frequency in the present embodiment, to be used for compressor
Throttling set conveys refrigerant with this aperture when starting.Target frequency is bigger, and the initial opening of throttling set is bigger.
Second obtains module 20, for obtaining the minimum rated frequency and maximum rated frequency of compressor, and by jot
The section between frequency and target frequency is determined as first interval, and the section between target frequency and maximum rated frequency is as
Two sections；
Understandably, in order to realize that different set temperatures, the running frequency of compressor are also different.In order to meet compressor
Normally, the minimum value and maximum value under the conditions of continuous work, compressor are provided with minimum rated frequency and maximum rated frequency, pressure
Frequency when contracting machine continuously works normally must be in the section between minimum rated frequency and maximum rated frequency.The present embodiment
In, second obtains module 20 using the section between minimum rated frequency and target frequency as first interval, target frequency and most
Section between big frequency is as second interval.
Choosing module 30, for selecting at least one frequency from first interval and/or second interval as test frequency,
And compressor frequency is adjusted to test frequency operation；
The present embodiment starts compressor with throttling set initial opening and opens fortune after the target frequency for obtaining compressor
Row.In order to ensure the stability and reliability of compressor operation, Choosing module 30 is selected from first interval or second interval
At least one frequency selects at least one frequency as test frequency as test frequency, or from first interval and second interval
Rate, and the frequency of compressor is adjusted to the operation of this test frequency.Specifically, then being surveyed when test frequency is located at first interval
Trying frequency is the first test frequency lower than target frequency；When test frequency is located at second interval, then test frequency be higher than
Second test frequency of target frequency.In one embodiment, compressor obtains pressure according to set temperature and indoor and outdoor surroundings temperature
The target frequency of contracting machine operation is 60HZ, and the variable frequency range of compressor is 30-130HZ, then this first test frequency can be 30-
Arbitrary value between 60HZ, the second test frequency can arbitrary values between 60-130HZ.After picking out test frequency, control
Compressor processed is with the operation of this test frequency.When being higher than 120 DEG C because of compressor exhaust temperature, compressor meeting stoppage protection, so
During compressor is run with test frequency, compressor exhaust temperature need to be detected, to prevent compressor exhaust temperature
It is excessively high to cause to shut down.Understandably, when throttling set aperture increases, cold medium flux increases, so that delivery temperature is reduced, according to
The compressor exhaust temperature and test frequency of detection adjust throttling set aperture, to prevent while ensuring test frequency operation
Compressor shutdown.
Module 40 is adjusted, is used for after compressor runs preset duration with test frequency, by compressor frequency by test frequency
Rate is adjusted to target frequency operation.
Further, control compressor runs preset duration with test frequency, when preset duration is pre-set one section
Between, it can be 1S or 2S, be run in this preset time period with test frequency, to ensure the stability of compressor operation and reliable
Property.After compressor runs preset duration with test frequency, in order to reach preset temperature, adjustment module 40 need to be by its running frequency
Target frequency is adjusted to by test frequency.Understandably, according to set temperature and indoor and outdoor surroundings temperature, determining will be indoor at present
Environment temperature is converted to cold medium flux required for set temperature.When set temperature and big indoor and outdoor surroundings temperature difference, institute
The coolant quantity needed is more, it is desirable that compressor frequency increases, to accelerate the conveying of refrigerant；When set temperature and indoor and outdoor surroundings temperature
When difference is little, required coolant quantity is few accordingly, and the lower frequency of compressor, which can be realized, achievees the purpose that set temperature.
In the present embodiment, because set temperature is a determining value, i.e., current indoor environment temperature is converted to required for set temperature
A cold medium flux also determining value, when test frequency is located at first interval, i.e. test frequency is lower than target frequency
When, in order to reach test frequency, the running frequency of compressor need to be increased to target frequency by test frequency, i.e., compressor is to cold
The conveying capacity of matchmaker increases.When test frequency is located at second interval, i.e., when test frequency is higher than target frequency, in order to reach test frequency
The running frequency of compressor need to be reduced to target frequency by test frequency by rate, i.e. compressor reduces the conveying capacity of refrigerant, institute
To need to adjust throttling set aperture according to target frequency to realize set temperature.Similarly, in frequency adjustment procedure,
Compressor exhaust temperature is detected, to prevent the excessively high stoppage protection of compressor exhaust temperature.When detecting compressor exhaust temperature mistake
Gao Shi, can be by reducing delivery temperature for the increased mode of throttling set aperture.In summary, in compressor frequency by testing
Frequency is adjusted to target frequency, throttling set aperture is adjusted according to target frequency and compressor exhaust temperature, to ensure
Compressor shutdown is prevented while compressor is run with target frequency, guarantees the stable operation of compressor.
The compressor start device for frequency conversion equipment of the present embodiment includes: the first acquisition module 10, is set for receiving
Determine temperature, and according to set temperature and indoor and outdoor surroundings temperature, obtains the target frequency of compressor operation；Second obtains module
20, for obtaining the minimum rated frequency and maximum rated frequency of compressor, and will be between minimum rated frequency and target frequency
Section as first interval, the section between target frequency and maximum rated frequency is as second interval；Choosing module 30 is used
It is adjusted in selecting at least one frequency from first interval and/or second interval as test frequency, and by compressor frequency
Test frequency operation；Module 40 is adjusted, is used for after compressor runs preset duration with test frequency, by compressor frequency by surveying
Examination frequency is adjusted to target frequency operation.This programme obtains pressure by set temperature and indoor and outdoor surroundings temperature based on the received
The target frequency of contracting machine operation；It is adjusted to test frequency less or greater than target frequency to control compressor, and with this
Test frequency operation, to determine the stability and reliability of compressor operation；When compressor is default with the operation of this test frequency
After length, then test frequency adjusted to target frequency, and is run with target frequency.Compression is detected in frequency adjustment process simultaneously
Machine delivery temperature, to adjust throttling set aperture according to compressor exhaust temperature and target frequency, it is ensured that realize target frequency fortune
It prevents compressor shutdown from protecting while row, guarantees the stable operation of system.The quick start for realizing compressor avoids pressure
Contracting machine is just run after each frequency plateau runs setting time with target frequency, reduces the starting time of system.
Further, referring to Fig. 4, the compressor start device first embodiment of frequency conversion equipment is used for based on the present invention,
The present invention is in the compressor start device second embodiment of frequency conversion equipment, the Choosing module 30 to include:
First control unit 31, for using the biggish section of frequency range in first interval and second interval as to be tested
Section；
The first adjustment unit 32, for selecting at least one frequency from section to be tested as test frequency, and will pressure
Contracting unit frequency is adjusted to test frequency operation.
Further, in the embodiment of the present invention, the variable frequency range of compressor is minimum rated frequency to maximum
Determine the frequency separation between frequency.The target frequency of compressor is not necessarily the median of variable frequency range, i.e. first interval
It is not necessarily identical with the frequency range of second interval.When first interval and not identical second interval frequency range, the first control
Unit 31 is using the biggish section of frequency range as section to be tested.The first adjustment unit 32 is biggish to be tested from frequency range
At least one frequency is selected in section as test frequency, and compressor frequency is adjusted to test frequency operation.To test frequency
The biggish section of rate range, keeps test result more accurate.It selects at least one frequency and test as test frequency and can subtract
Few compressor start runing time can also select multiple frequencies and make to further ensure that the stabilization of compressor is accurately run
It is tested respectively for test frequency.
Further, referring to Fig. 5, the compressor start device second embodiment of frequency conversion equipment is used for based on the present invention,
The present invention is used in the compressor start device 3rd embodiment of frequency conversion equipment, the Choosing module 30 further include:
Determination unit 33, for adjusting bypath valve aperture according to bypath valve regulating command, and according to bypath valve
Aperture determines the pressure difference of exhaust and return-air；
Second adjustment unit 34 determines the frequency modulation speed of compressor for the pressure difference according to exhaust and return-air, and will pressure
Contracting unit frequency is adjusted to test frequency operation with the frequency modulation speed.
Further, it is applied in example of the invention real one, please refers to Fig. 8, set on the return-air and exhaust line of compressor
It is equipped with by-passing valve and pressure sensor, 8,1 is compressor in figure, 2 is indoor unit, 3 is throttling set, 4 is condenser, 5 is other
Port valve door, 6 be four-way valve, 7 be pressure sensor, 8 be gas-liquid separator.By-passing valve is for balancing compressor vapor return line and row
The pressure of gas pipeline, pressure sensor is for detecting vapor return line pressure and exhaust line pressure.Specifically, bypath valve aperture
It is adjustable, compressor may be jeopardized when pressure sensor detects that the pressure difference between vapor return line and exhaust line is larger
When, increase bypath valve aperture, to reduce pressure difference protection compressor.The frequency modulation speed of compressor is vented with it and back pressure
Poor related, exhaust and back pressure difference are big, and compressor frequency modulation speed is slow, and exhaust and back pressure difference are small, compressor frequency modulation speed
Fastly.After the target frequency for obtaining compressor operation, bypath valve is opened, pressure sensor detects the pressure of exhaust line and returns
The pressure of gas pipeline, determination unit 33 determines the pressure difference of exhaust and return-air, to determine compressor tune according to the pressure difference
Frequency speed.Understandably, it in compressor frequency-modulating process, is influenced by extraneous factor, may cause exhaust and back pressure is poor
Become larger, influences compressor operating.When detecting that exhaust and back pressure difference become larger, that is, increase bypath valve aperture, with drop
The pressure difference of low exhaust and return-air, to ensure the even running of compressor.In the pressure difference according to exhaust and return-air, compression is determined
After machine frequency modulation speed, second adjustment unit 34 controls compressor with compressor frequency modulation speed making frequency adjustment.Compressor frequency modulation
Speed is big, and compressor is tuned to that test frequency the time it takes is shorter, can be faster be tuned to test frequency；Correspondingly,
Compressor frequency modulation speed is small, and it is slower to be tuned to test frequency.After compressor is tuned to test frequency, that is, stop compressor tune
Frequently, and with the operation of this test frequency.
Further, referring to Fig. 6, the compressor start device 3rd embodiment of frequency conversion equipment is used for based on the present invention,
The present invention is in the compressor start device fourth embodiment of frequency conversion equipment, the adjustment module 40 to include:
Receiving unit 41 is gradually closed for after compressor runs preset duration with test frequency, receiving bypath valve
Instruction；
Second control unit 42, for when the frequency of compressor is adjusted to target frequency by test frequency, by by-passing valve
It completely closes, and controls compressor and run with target frequency.
In the present embodiment, after compressor is tuned to test frequency, preset duration is run with test frequency, presets it herein
In, compressor can even running, then illustrate compressor runnability stablize.When compressor is default with test frequency operation
Between after, in order to realize set temperature, need by test frequency to adjust the frequency of compressor to target corresponding with set temperature
Frequency.The frequency modulation speed that compressor is determined according to exhaust and back pressure difference, because exhaust and back pressure difference are influenced by by-passing valve,
After compressor runs preset time with test frequency, bypath valve need to be closed.It is stable to guarantee, using certain speed
Degree gradually closes this bypath valve, and wherein closing velocity can be used piecewise function mode and change step by step.Receiving unit 41 receives
Bypath valve is gradually closed in bypath valve out code in a manner of piecewise function, when compressor test frequency is adjusted to mesh
After marking frequency, the second control unit 42 control bypath valve is completely closed, and with the operation of this target frequency.
Further, referring to Fig. 7, the compressor start device fourth embodiment of frequency conversion equipment is used for based on the present invention,
The present invention is in the 5th embodiment of compressor start device of frequency conversion equipment, the compressor start for frequency conversion equipment to be filled
It sets further include:
Detection module 50, for detecting compressor exhaust temperature；
Adjustment module 60, for throttling set aperture being adjusted, to ensure to press according to target frequency and compressor exhaust temperature
Contracting machine stable operation.
In the present embodiment, after compressor is run with target frequency, in fact it could happen that compressor exhaust temperature is excessively high to be caused to press
The problem of contracting machine stoppage protection.So detection module 50 detects the exhaust temperature of compressor when compressor is run with target frequency
Degree, to adjust throttling set aperture according to compressor exhaust temperature.Specifically, when detecting that compressor exhaust temperature is excessively high,
Adjustment module 60 increases throttling set aperture, increases as throttling set aperture increases cold medium flux, to reduce delivery temperature.
It avoids that compressor exhaust temperature is excessively high to cause compressor shutdown to run, ensure that the stable operation of compressor.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the design of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/it is used in it indirectly
He is included in scope of patent protection of the invention relevant technical field.
Claims (10)
1. a kind of compressor start method for frequency conversion equipment, which is characterized in that the compressor for frequency conversion equipment opens
Dynamic method the following steps are included:
Set temperature is received, and according to set temperature and indoor and outdoor surroundings temperature, obtains the target frequency of compressor operation；
The minimum rated frequency and maximum rated frequency of compressor are obtained, and by the area between minimum rated frequency and target frequency
Between be used as first interval, the section between target frequency and maximum rated frequency is as second interval；
At least one frequency is selected from first interval and/or second interval to adjust as test frequency, and by compressor frequency
It is run to test frequency；
The delivery temperature of compressor is detected, and according to the compressor exhaust temperature and test frequency of detection, adjusts throttling
Device aperture；
After compressor runs preset duration with test frequency, compressor frequency is adjusted to target frequency fortune by test frequency
Row.
2. being used for the compressor start method of frequency conversion equipment as described in claim 1, which is characterized in that described from first interval
And/or at least one frequency is selected in second interval as test frequency, and compressor frequency is adjusted to test frequency operation
The step of include:
Using the biggish section of frequency range in first interval and second interval as section to be tested；
At least one frequency is selected from section to be tested as test frequency, and compressor frequency is adjusted to test frequency fortune
Row.
3. being used for the compressor start method of frequency conversion equipment as claimed in claim 1 or 2, which is characterized in that described to compress
Unit frequency be adjusted to test frequency operation the step of include:
Bypath valve aperture is adjusted according to bypath valve regulating command, and according to the aperture of bypath valve, determines exhaust and return-air
Pressure difference；
According to the pressure difference of exhaust and return-air, the frequency modulation speed of compressor is determined, and by compressor frequency with the frequency modulation speed
It is adjusted to test frequency operation.
4. as claimed in claim 3 be used for frequency conversion equipment compressor start method, which is characterized in that it is described compressor with
After test frequency runs preset duration, compressor frequency, which is adjusted to the step of target frequency is run by test frequency, includes:
After compressor runs preset duration with test frequency, bypath valve gradually out code is received；
When the frequency of compressor is adjusted to target frequency by test frequency, by-passing valve is completely closed, and control compressor with
Target frequency operation.
5. as claimed in claim 3 be used for frequency conversion equipment compressor start method, which is characterized in that it is described compressor with
After test frequency runs preset duration, compressor frequency is adjusted to wrap after the step of target frequency is run by test frequency
It includes:
Detect compressor exhaust temperature；
According to target frequency and compressor exhaust temperature, throttling set aperture is adjusted, to ensure compressor stable operation.
6. a kind of compressor start device for frequency conversion equipment, which is characterized in that the compressor for frequency conversion equipment opens
Dynamic device includes:
First obtains module, for receiving set temperature, and according to set temperature and indoor and outdoor surroundings temperature, obtains compressor fortune
Capable target frequency；
Second obtains module, for obtaining the minimum rated frequency and maximum rated frequency of compressor, and by minimum rated frequency
Section between target frequency is as first interval, and the section between target frequency and maximum rated frequency is as the secondth area
Between；
Choosing module, for selecting at least one frequency from first interval and/or second interval as test frequency, and will pressure
Contracting unit frequency is adjusted to test frequency operation；
The Choosing module is also used to detect the delivery temperature of compressor, and according to the compressor exhaust temperature of detection
And test frequency, adjust throttling set aperture；
Module is adjusted, for after compressor runs preset duration with test frequency, compressor frequency to be adjusted by test frequency
For target frequency operation.
7. being used for the compressor start device of frequency conversion equipment as claimed in claim 6, which is characterized in that the Choosing module packet
It includes:
First control unit, for using the biggish section of frequency range in first interval and second interval as section to be tested；
The first adjustment unit, for selecting at least one frequency from section to be tested as test frequency, and frequently by compressor
Rate is adjusted to test frequency operation.
8. the compressor start device for frequency conversion equipment as claimed in claims 6 or 7, which is characterized in that described to select mould
Block further include:
Determination unit, for adjusting bypath valve aperture according to bypath valve regulating command, and according to the aperture of bypath valve, really
The pressure difference of fixed exhaust and return-air；
Second adjustment unit determines the frequency modulation speed of compressor for the pressure difference according to exhaust and return-air, and frequently by compressor
Rate is adjusted to test frequency operation with the frequency modulation speed.
9. being used for the compressor start device of frequency conversion equipment as claimed in claim 8, which is characterized in that the adjustment module packet
It includes:
Receiving unit, for receiving bypath valve gradually out code after compressor runs preset duration with test frequency；
Second control unit, for when the frequency of compressor is adjusted to target frequency by test frequency, by-passing valve to be closed completely
It closes, and controls compressor and run with target frequency.
10. being used for the compressor start device of frequency conversion equipment as claimed in claim 8, which is characterized in that described to be used for frequency conversion
The compressor start device of equipment further include:
Detection module, for detecting compressor exhaust temperature；
Adjustment module, for throttling set aperture being adjusted, to ensure that compressor is steady according to target frequency and compressor exhaust temperature
Fixed operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710075129.2A CN106895622B (en) | 2017-02-10 | 2017-02-10 | Compressor start method and device for frequency conversion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710075129.2A CN106895622B (en) | 2017-02-10 | 2017-02-10 | Compressor start method and device for frequency conversion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106895622A CN106895622A (en) | 2017-06-27 |
| CN106895622B true CN106895622B (en) | 2019-06-04 |
Family
ID=59198764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710075129.2A Active CN106895622B (en) | 2017-02-10 | 2017-02-10 | Compressor start method and device for frequency conversion equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106895622B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107763732A (en) * | 2017-09-15 | 2018-03-06 | 珠海格力电器股份有限公司 | Radiation air-conditioner indoor set, air-conditioning system and control method |
| CN108206625A (en) * | 2018-01-10 | 2018-06-26 | 合肥美的电冰箱有限公司 | A kind of method for inhibiting harmonic current of refrigerator, frequency conversion board and refrigerator refrigeration system |
| CN113749480B (en) * | 2021-08-12 | 2022-09-09 | 珠海格力电器股份有限公司 | Control method and device of refrigeration equipment, controller and refrigeration equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013057506A (en) * | 2012-12-27 | 2013-03-28 | Espec Corp | Operation control method of refrigerator in environmental test system, and environmental test system |
| CN103939321A (en) * | 2014-04-02 | 2014-07-23 | 邯郸美的制冷设备有限公司 | Control method and device for air conditioner compressor starting |
| CN104456963A (en) * | 2013-09-25 | 2015-03-25 | 珠海格力电器股份有限公司 | Method and device for controlling work frequency of compressor |
| CN104763624A (en) * | 2014-01-06 | 2015-07-08 | 广东美的制冷设备有限公司 | Frequency control method of compressor |
| CN105020855A (en) * | 2015-07-24 | 2015-11-04 | 广东美的制冷设备有限公司 | Variable frequency air conditioner control method and system |
| CN105571047A (en) * | 2014-10-14 | 2016-05-11 | 青岛海尔科技有限公司 | Control method and device for rapid refrigerating or rapid heating of direct-current variable frequency air conditioner |
-
2017
- 2017-02-10 CN CN201710075129.2A patent/CN106895622B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013057506A (en) * | 2012-12-27 | 2013-03-28 | Espec Corp | Operation control method of refrigerator in environmental test system, and environmental test system |
| CN104456963A (en) * | 2013-09-25 | 2015-03-25 | 珠海格力电器股份有限公司 | Method and device for controlling work frequency of compressor |
| CN104763624A (en) * | 2014-01-06 | 2015-07-08 | 广东美的制冷设备有限公司 | Frequency control method of compressor |
| CN103939321A (en) * | 2014-04-02 | 2014-07-23 | 邯郸美的制冷设备有限公司 | Control method and device for air conditioner compressor starting |
| CN105571047A (en) * | 2014-10-14 | 2016-05-11 | 青岛海尔科技有限公司 | Control method and device for rapid refrigerating or rapid heating of direct-current variable frequency air conditioner |
| CN105020855A (en) * | 2015-07-24 | 2015-11-04 | 广东美的制冷设备有限公司 | Variable frequency air conditioner control method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106895622A (en) | 2017-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10480835B2 (en) | Gas-replenishing and enthalpy-increasing control method, device and apparatus for two-stage compressor | |
| US10197321B2 (en) | Refrigeration apparatus | |
| CN106895622B (en) | Compressor start method and device for frequency conversion equipment | |
| US10465964B2 (en) | Refrigeration cycle apparatus and control method of refrigeration cycle apparatus | |
| US10753660B2 (en) | Air-conditioning apparatus | |
| CN106556187B (en) | The control method that is run under air-conditioning refrigeration system critical state, apparatus and system | |
| US11137157B2 (en) | Method for controlling multi-split air conditioner, multi-split air conditioner system, and computer-readable storage medium | |
| US10222081B2 (en) | Air-conditioning apparatus | |
| US9920965B2 (en) | Air conditioner with oil separators and method for controlling the same | |
| US20190203995A1 (en) | Refrigeration device | |
| US20150168044A1 (en) | Air conditioner and method of controlling an air conditioner | |
| CN104481881B (en) | Air-conditioning unit compressor liquid impact determination method and system and air-conditioning unit | |
| CN108458452A (en) | Air conditioner and its control method and computer readable storage medium | |
| US11092362B2 (en) | Air-conditioning device | |
| US10627138B2 (en) | Air-conditioning apparatus with return oil flow controlled through solenoid valves | |
| CN108444079A (en) | Air conditioner and its control method and computer readable storage medium | |
| CN109073304B (en) | Refrigerating device | |
| CN107339834B (en) | The control method and device of natural cooling unit | |
| CN111306731B (en) | Air conditioner electromagnetic valve control method, device and equipment, electromagnetic valve system and air conditioner | |
| US11204188B2 (en) | Air-conditioning device | |
| US11725661B2 (en) | Method of improved control for variable volume ratio valve | |
| CN114364934B (en) | Outdoor unit and refrigeration cycle device | |
| US20220146165A1 (en) | Air conditioning apparatus | |
| CN109186042B (en) | Defrosting method for air conditioner | |
| EP3988871A1 (en) | Outdoor unit, refrigeration cycle device, and refrigerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |