CN109357439A - A kind of control method and air conditioner of compressor exhaust temperature - Google Patents
A kind of control method and air conditioner of compressor exhaust temperature Download PDFInfo
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- CN109357439A CN109357439A CN201811208742.8A CN201811208742A CN109357439A CN 109357439 A CN109357439 A CN 109357439A CN 201811208742 A CN201811208742 A CN 201811208742A CN 109357439 A CN109357439 A CN 109357439A
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- compressor
- temperature
- expansion valve
- electric expansion
- opening angle
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/16—Lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of control method of compressor exhaust temperature and air conditioner, the control method of compressor exhaust temperature is provided with electric expansion valve on the oil return line of compressor；Control method includes: to obtain the delivery temperature of compressor；The delivery temperature of compressor and multiple temperature range ranges are compared；The temperature range range fallen into according to the delivery temperature of compressor, controls the opening angle of electric expansion valve, to control the oil mass for flowing to compressor in oil return line.The control method of compressor exhaust temperature of the invention, electric expansion valve is provided on the oil return line of compressor of air conditioner, it being capable of the temperature range according to locating for the compressor exhaust temperature detected, the aperture of electric expansion valve is controlled, to control the recirculating oil quantity of compressor, and then controlled by delivery temperature of the oil return of compressor to compressor.
Description
Technical field
The present invention relates to air conditioner technical field, in particular to the control method and air-conditioning of a kind of compressor exhaust temperature
Device.
Background technique
In air-conditioning system, delivery temperature protection belongs to compressor temperature and protects one such type.The exhaust of compressor
Temperature is excessively high to not only result in compressor power consumption increase, and lubricating oil can be made to carbonize, and degradation influences the normal work of compressor
Make.
Summary of the invention
In view of this, the present invention is directed to propose a kind of control method of compressor exhaust temperature, with the exhaust to compressor
Temperature is controlled.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of control method of compressor exhaust temperature, is provided with electric expansion valve on the oil return line of compressor；
Obtain the delivery temperature of the compressor；
The delivery temperature of the compressor and multiple temperature range ranges are compared；
The temperature range range fallen into according to the delivery temperature of the compressor, controls the opening angle of the electric expansion valve
Degree, to control the oil mass for flowing to the compressor in the oil return line.
Further, if the delivery temperature of the compressor of the acquisition is higher, the opening angle of the electric expansion valve is controlled
Degree is bigger, so that the oil mass for flowing to the compressor in the oil return line is bigger.
Further, the temperature range range fallen into according to the delivery temperature of the compressor, controls the electronic expansion
The step of opening angle of valve specifically:
The temperature range range fallen into according to the delivery temperature of the compressor determines the unlatching of current electric expansion valve
Angular values；
According to the opening angle of electric expansion valve described in the opening angle Numerical Control of the electric expansion valve；
Wherein, the multiple temperature range range respectively corresponds the opening angle numerical value of corresponding electric expansion valve.
Further, when being greater than 70 DEG C in the delivery temperature of the compressor, and being less than or equal to 85 DEG C, the electronics is controlled
The opening angle of expansion valve is 290 steps~310 steps；
When being greater than 85 DEG C in the delivery temperature of the compressor, and being less than or equal to 100 DEG C, the electric expansion valve is controlled
Opening angle is 390 steps~410 steps.
Further, when being greater than 70 DEG C in the delivery temperature of the compressor, and being less than or equal to 85 DEG C, the electronics is controlled
The opening angle of expansion valve is 300 steps.
Further, when being greater than 85 DEG C in the delivery temperature of the compressor, and being less than or equal to 100 DEG C, the electricity is controlled
The opening angle of sub- expansion valve is 400 steps.
Further, when the delivery temperature of the compressor is less than or equal to 70 DEG C, the compressor keeps normal oil return
Amount；Wherein, the opening angle of the corresponding electric expansion valve of the normal recirculating oil quantity is 190 steps~210 steps.
Further, the opening angle of the corresponding electric expansion valve of the normal recirculating oil quantity is 200 steps.
Compared with the existing technology, the control method of compressor exhaust temperature of the present invention has the advantage that
The control method of compressor exhaust temperature of the present invention is provided with electricity on the oil return line of compressor of air conditioner
Sub- expansion valve, can the temperature range according to locating for the compressor exhaust temperature detected, the aperture of electric expansion valve is carried out
Control, to control the recirculating oil quantity of compressor, and then is controlled by delivery temperature of the oil return of compressor to compressor.
Another object of the present invention is to propose a kind of air conditioner, can be carried out to the delivery temperature of cooler compressor
Control, reduces delivery temperature in excessive discharge temperature.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of air conditioner, comprising:
Electric expansion valve, the electric expansion valve are located on the oil return line of compressor；
Exhaust gas temperature sensor, to obtain the delivery temperature of the compressor and be sent to controller system；
Controller system for comparing the delivery temperature of the compressor and multiple temperature range ranges, and is sentenced
Determine temperature range range locating for delivery temperature, and, the temperature range range fallen into according to the delivery temperature of the compressor, control
The opening angle of the electric expansion valve is made, to control the oil mass for flowing to the compressor in the oil return line.
Further, further includes:
Storage unit, the storage unit is stored with multiple temperature range ranges, and divides with multiple temperature range ranges
The opening angle numerical value of not corresponding electric expansion valve；
The controller system includes:
Comparison unit for comparing the delivery temperature of the compressor and multiple temperature range ranges, and determines
Temperature range range locating for delivery temperature；
Recognition unit, the temperature range range for being fallen into according to the delivery temperature of the compressor determine current electronics
The opening angle numerical value of expansion valve；
Control unit, the unlatching for electric expansion valve described in the opening angle Numerical Control according to the electric expansion valve
Angle.
Air conditioner of the invention and the control method of above-mentioned compressor delivery temperature are possessed excellent compared with the existing technology
Gesture is identical, and details are not described herein.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the control method flow chart of compressor exhaust temperature described in the embodiment of the present invention；
Fig. 2 is the electrical structure diagram of air conditioner described in the embodiment of the present invention.
Description of symbols:
1- compressor, 101- oil storage tank, 2- gas-liquid separator, 3- exhaust gas temperature sensor, 4- oil eliminator, 5- four-way
Valve, 6- filter, 7- electric expansion valve, 8- oil return capillary, 9- suction temperature sensor, 10- oil return line.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Embodiment one
As illustrated in fig. 1 and 2, the invention proposes a kind of control method of compressor exhaust temperature, compressor of air conditioner 1 is returned
Electric expansion valve 7 is provided on oil pipe line 10；
Control method includes:
The delivery temperature of S1 acquisition compressor；
S2 compares the delivery temperature of compressor and multiple temperature range ranges；
The temperature range range that S3 is fallen into according to the delivery temperature of compressor, controls the opening angle of electric expansion valve, with
The oil mass of compressor is flowed in control oil return line.
Currently, usually being controlled by the aperture of electric expansion valve 7 cold generally in the excessive discharge temperature of air-conditioning system
Matchmaker's internal circulating load, so that the return-air degree of superheat of air-conditioning is controlled, reduction by 1 delivery temperature of compressor, but this control delivery temperature
Mode is easy to happen failure, and when aperture is excessive, the return-air degree of superheat is to repeat, and suction temperature is lower than saturation temperature, returns gas carrying liquid,
It is easy to happen liquid hammer；Or the regulation of temperature is exhausted by throttle capillary tube, but this kind of mode can not adjust air-breathing mistake
Heat, ability of intelligently sacrificing when system exhaust temperature is high reduce by 1 revolving speed of compressor thus to reduce delivery temperature.
In the present invention, it is provided with electric expansion valve 7 on the oil return line 10 of compressor of air conditioner 1, it is swollen by control electronics
The opening angle of swollen valve 7；When the opening angle to electric expansion valve 7 controls, by the delivery temperature of compressor 1 with it is multiple
Temperature range range compares, and according to the temperature range range that the delivery temperature of 1 machine of compression is fallen into, corresponds to control not with this
Same 1 recirculating oil quantity of compressor, so as to the recirculating oil quantity of compressor 1 can be changed when the delivery temperature for detecting compressor is higher,
The oil mass of compressor 1 is flowed in oil return line 10, wherein if the delivery temperature of the compressor 1 obtained is higher, control electronics is swollen
The opening angle of swollen valve 7 is bigger, so that the oil mass for flowing to compressor 1 in oil return line 10 is bigger, for two different temperature
Interval range, if wherein in a temperature range range temperature minimum be greater than another temperature range range in temperature range most
Big value, then when corresponding 1 delivery temperature of current compressor falls into the temperature range range, corresponding control Current electronic expansion valve
7 aperture is greater than aperture when delivery temperature falls into another temperature range range, so that the oil reserve of compressor 1 increases,
Friction slows down between the machinery of compressor 1, and frictional heat is reduced, and the delivery temperature of compressor 1 is reduced with this.
Wherein, the temperature range range fallen into according to the delivery temperature of compressor 1 controls the opening angle of electric expansion valve 7
The step of spending specifically:
The temperature range range that S201 is fallen into according to the delivery temperature of compressor 1 determines opening for current electric expansion valve 7
Open angular values；
S202 is according to the opening angle of the opening angle Numerical Control electric expansion valve 7 of electric expansion valve 7；
Wherein, multiple temperature range ranges respectively correspond the opening angle numerical value of corresponding electric expansion valve 7.
Wherein, multiple temperature range ranges respectively correspond the opening angle numerical value of corresponding electric expansion valve 7.
In the present embodiment, it when getting the excessive discharge temperature of compressor 1, then needs to cool down to compressor 1
Processing is respectively as follows: 0~70 DEG C, 70~85 DEG C and 85 wherein temperature range range is three specifically, in the present embodiment
The opening angle numerical value of~100 DEG C and its corresponding electric expansion valve 7 is, 190~210 steps, 290~310 steps and
390~410 steps.
When the delivery temperature for getting compressor 1 is greater than 70 DEG C, the excessive discharge temperature of compressor 1 at this time needs pair
Compressor 1 carries out cooling processing, and when the delivery temperature of compressor 1 is less than or equal to 70 DEG C, the delivery temperature of compressor 1 is just
Often.
Wherein, specifically, the delivery temperature of compressor 1 is normal when the delivery temperature of compressor 1 is less than or equal to 70 DEG C,
Compressor 1 can operate normally, at this point, compressor 1 keeps normal recirculating oil quantity；Wherein, the corresponding electronic expansion of normal recirculating oil quantity
The opening angle of valve 7 is 190 steps~210 steps, preferably, the opening angle of the corresponding electric expansion valve 7 of normal recirculating oil quantity is 200
Step, so that the opening angle of electric expansion valve 7 is in a suitable state, at this time when the delivery temperature of compressor 1 is normal
Oil mass in compressor 1 is not too high and too low.
When being greater than 70 DEG C in the delivery temperature of compressor 1, and being less than or equal to 85 DEG C, the opening angle of electric expansion valve 7 is controlled
Degree is 290 steps~310 steps；Preferably, the opening angle of control electric expansion valve 7 is 300 steps, at this point, the exhaust temperature of compressor 1
Degree is higher, needs to carry out cooling processing, and the opening angle of electric expansion valve 7 is improved by control, increases the recirculating oil quantity of compressor 1
Greatly, i.e., the lubricating oil for compressor 1 being flowed in oil return line 10 increases, so that the oily accounting inside compressor 1 increases, passes through lubrication
The cooling effect and lubricant effect of oil, reduce the mechanical energy of compressor 1, to play the delivery temperature for reducing compressor 1
Effect.
When being greater than 85 DEG C in the delivery temperature of compressor 1, and being less than or equal to 100 DEG C, the opening angle of electric expansion valve 7 is controlled
Degree is 390 steps~410 steps；Preferably, the opening angle of control electric expansion valve 7 is 400 steps, at this point, the exhaust temperature of compressor 1
Height is spent, the further opening angle for improving electric expansion valve 7, so that the recirculating oil quantity of compressor 1 is larger improved, compression
Oily accounting inside machine 1 increases to much higher value, by the cooling effect and lubricant effect of lubricating oil, makes the mechanical energy of compressor 1
It reduces, to reduce the delivery temperature of compressor 1, the delivery temperature of compressor 1 is made to reach reasonable range.
Wherein, preferably, continuing to monitor the delivery temperature of compressor 1, when the delivery temperature of compressor 1 is higher, pass through
Control improves the opening angle of electric expansion valve 7, increases the recirculating oil quantity of compressor 1, thus the cooling effect for passing through lubricating oil
And lubricant effect, reduce the mechanical energy of compressor 1；When the delivery temperature for monitoring compressor 1 reduces, or it is in normal row
Gas temperature range, if delivery temperature is from when being reduced to 70 DEG C or less for 70 DEG C or more, real-time control reduces the unlatching of electric expansion valve 7
Angle, so that the recirculating oil quantity of compressor 1 is reduced, to guarantee that the oil reserve of compressor 1 is in after delivery temperature reduction
The safe range of one comparison, enables compressor 1 normally to run.
It is flowed in oil return line 10 by the opening angle of electric expansion valve 7 in control oil return line 10 to control with this
To the lubricating oil of compressor 1, recirculating oil quantity is being controlled while guaranteeing that 1 oil mass of compressor is safe, it can be by making compressor 1
Oil reserve increases, so that friction slows down between the machinery of compressor 1, so that frictional heat be made to reduce, compression is reduced and guaranteed with this
The delivery temperature of machine 1.
Embodiment two
As illustrated in fig. 1 and 2, according to the control method of above-mentioned compressor exhaust temperature, the invention proposes a kind of air-conditionings
Device, comprising:
Electric expansion valve 7, electric expansion valve 7 are located on the oil return line 10 of compressor 1；
Exhaust gas temperature sensor 3, to obtain the delivery temperature of compressor 1 and be sent to controller system；
Controller system for comparing the delivery temperature of compressor 1 and multiple temperature range ranges, and determines to arrange
Temperature range range locating for temperature degree, and, the temperature range range fallen into according to the delivery temperature of compressor 1 controls electronics
The opening angle of expansion valve 7, to control the oil mass for flowing to compressor 1 in oil return line 10.
Wherein, as shown in Fig. 2, being the electrical structure diagram of air conditioner in the present embodiment, the compressor 1 of air conditioner includes and pressure
Contracting machine 1 be connected to oil storage tank 101, the four-way valve 5 of air conditioner respectively with the condenser (not shown) of air conditioner, evaporator
(not shown), compressor 1 and gas-liquid separator 2 are connected to, compressor 1 and oil storage tank 101 also respectively with gas-liquid separator
2 connections；Air conditioner further includes having exhaust gas temperature sensor 3 and suction temperature sensor 9, is respectively used to the row of detection compressor 1
The intake air temperature of temperature degree and gas-liquid separator 2.Exhaust gas temperature sensor 3 is arranged close to compressor 1, suction temperature sensor 9
It is arranged close to gas-liquid separator 2.
Wherein, oil eliminator 4 is additionally provided between compressor 1 and four-way valve 5, oil eliminator 4 also connects with gas-liquid separator 2
Logical, electric expansion valve 7 is connected to oil eliminator 4 and gas-liquid separator 2, is also set up between electric expansion valve 7 and oil eliminator 4
There is filter 6, oil return capillary 8 is provided between gas-liquid separator 2 and electric expansion valve 7, will be steamed with this in oil eliminator 4
The impurity in lubricating oil is filtered when vapour is separated with lubricating oil, and passes through electricity in the lubricating oil that compressor 1 is discharged
After sub- expansion valve 7 changes the size of recirculating oil quantity, gas-liquid separator 2 is flowed into simultaneously by the oil return capillary 8 that electric expansion valve 7 connects
It flows back into the oil storage tank 101 of compressor 1, so as to form the recirculating oil quantity control to compressor 1.
When exhaust gas temperature sensor 3 detects the excessive discharge temperature of compressor 1, compressor 1 is discharged oil eliminator 4
High steam in lubricating oil separated, lubricating oil by oil return line 10 enter gas-liquid separator 2, thus gas-liquid separation
Lubricating oil out of, the oil return hole of gas-liquid separator 2 flows into compressor 1 oil storage tank 101, the oil storage of compressor 1 is made with this by device 2
Higher oil reserve is kept in tank 101, when compressor 1 is run, by the lubricating action of lubricating oil, so that the machine of compressor 1
Friction slows down between tool, to make frictional heat reduce, also, lubricating oil has certain cooling effect, reduces and guarantees with this
The delivery temperature of compressor 1.
Wherein, electric expansion valve 7 is provided on oil return line 10, electric expansion valve 7 is electrically connected with controller system, control
Device system processed can control the opening angle of electric expansion valve 7, so as to lead to when the delivery temperature for detecting compressor 1 is higher
The recirculating oil quantity of compressor 1 can be changed by crossing control electric expansion valve 7, i.e., the oil mass of compressor 1 is flowed in oil return line 10.
If the delivery temperature of the compressor 1 obtained is higher, the opening angle for controlling electric expansion valve 7 is bigger, so that oil return
The oil mass that compressor 1 is flowed in pipeline 10 is bigger, so that the oil reserve of compressor 1 increases, rubs between the machinery of compressor 1
Slow down, frictional heat is reduced, also, lubricating oil has certain cooling effect, and the delivery temperature of compressor 1 is reduced with this.
In the present embodiment, air conditioner further includes storage unit, and storage unit is stored with multiple temperature range ranges, and
The opening angle numerical value of electric expansion valve 7 corresponding with multiple temperature range ranges；
Controller system includes:
Comparison unit for comparing the delivery temperature of compressor 1 and multiple temperature range ranges, and determines to be vented
Temperature range range locating for temperature；
Recognition unit, the temperature range range for being fallen into according to the delivery temperature of compressor 1 determine that current electronics is swollen
The opening angle numerical value of swollen valve 7；
Control unit, for the opening angle according to the opening angle Numerical Control electric expansion valve 7 of electric expansion valve 7.
In the present embodiment, it when getting the excessive discharge temperature of compressor 1, then needs to cool down to compressor 1
Processing is respectively as follows: 0~70 DEG C, 70~85 DEG C and 85 wherein temperature range range is three specifically, in the present embodiment
The opening angle numerical value of~100 DEG C and its corresponding electric expansion valve 7 are as follows: 190~210 steps, 290~310 steps and
390~410 steps.
When the delivery temperature for getting compressor 1 is greater than 70 DEG C, the excessive discharge temperature of compressor 1 at this time needs pair
Compressor 1 carries out cooling processing, and when the delivery temperature of compressor 1 is less than or equal to 70 DEG C, the delivery temperature of compressor 1 is just
Often.
Wherein specifically, exhaust gas temperature sensor 3 detects current 1 delivery temperature of compressor, and it is sent to controller system
The comparison unit of system such as detects that temperature is 60 DEG C at this time, and comparison unit determines the exhaust of compressor 1 at this time according to comparative situation
When temperature is less than or equal to 70 DEG C, compressor 1 is operated normally, and recognition unit is determined according to the temperature range range that delivery temperature is fallen into
The opening angle numerical value of current electric expansion valve 7 is 190 steps~210 steps, and compressor 1 keeps normal recirculating oil quantity at this time；Preferably
, it is 200 steps that compressor 1, which keeps the opening angle of the corresponding electric expansion valve 7 of normal recirculating oil quantity, and control unit is swollen according to electronics
The opening angle of the opening angle Numerical Control electric expansion valve 7 of swollen valve 7, so that when the delivery temperature of compressor 1 is normal, electricity
The opening angle of sub- expansion valve 7 is in a suitable state, and the oil mass in compressor 1 is not too high and too low at this time.
When being greater than 70 DEG C in the delivery temperature of compressor 1, and being less than or equal to 85 DEG C, the opening angle of electric expansion valve 7 is controlled
Degree is 290 steps~310 steps；Preferably, the opening angle of control electric expansion valve 7 is 300 steps, at this point, the exhaust temperature of compressor 1
Degree is higher, needs to carry out cooling processing, by increasing the recirculating oil quantity of compressor 1, i.e., flows to compressor 1 in oil return line 10
Lubricating oil increases, so that the oily accounting inside compressor 1 increases, by the cooling effect and lubricant effect of lubricating oil, makes to compress
The mechanical energy of machine 1 reduces, also, lubricating oil has certain cooling effect, to play the delivery temperature for reducing compressor 1
Effect.
When being greater than 85 DEG C in the delivery temperature of compressor 1, and being less than or equal to 100 DEG C, the opening angle of electric expansion valve 7 is controlled
Degree is 390 steps~410 steps；Preferably, the opening angle of control electric expansion valve 7 is 400 steps, at this point, the exhaust temperature of compressor 1
Height is spent, the further opening angle for improving electric expansion valve 7, so that the recirculating oil quantity of compressor 1 is larger improved, compression
Oily accounting inside machine 1 increases to much higher value, by the cooling effect and lubricant effect of lubricating oil, makes the mechanical energy of compressor 1
It reduces, to reduce the delivery temperature of compressor 1.
It is flowed in oil return line 10 by the opening angle of electric expansion valve 7 in control oil return line 10 to control with this
To the lubricating oil of compressor 1, recirculating oil quantity is being controlled while guaranteeing that 1 oil mass of compressor is safe, it can be by making compressor 1
Oil reserve increases, so that friction slows down between the machinery of compressor 1, so that frictional heat is reduced, meanwhile, have in lubricating oil certain
Under the action of cooling effect, the delivery temperature of compressor 1 is reduced and guaranteed.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of control method of compressor exhaust temperature, which is characterized in that be provided with electronics on the oil return line of compressor
Expansion valve；The control method includes:
Obtain the delivery temperature of the compressor；
The delivery temperature of the compressor and multiple temperature range ranges are compared；
The temperature range range fallen into according to the delivery temperature of the compressor, controls the opening angle of the electric expansion valve,
To control the oil mass for flowing to the compressor in the oil return line.
2. the control method of compressor exhaust temperature according to claim 1, which is characterized in that if the compression of the acquisition
The delivery temperature of machine is higher, and the opening angle for controlling the electric expansion valve is bigger, so that in the oil return line described in flow direction
The oil mass of compressor is bigger.
3. the control method of compressor exhaust temperature according to claim 2, which is characterized in that according to the compressor
The temperature range range that delivery temperature is fallen into, the step of controlling the opening angle of the electric expansion valve specifically:
The temperature range range fallen into according to the delivery temperature of the compressor determines the opening angle of current electric expansion valve
Numerical value；
According to the opening angle of electric expansion valve described in the opening angle Numerical Control of the electric expansion valve；
Wherein, the multiple temperature range range respectively corresponds the opening angle numerical value of corresponding electric expansion valve.
4. the control method of compressor exhaust temperature according to claim 1 to 3, which is characterized in that
When being greater than 70 DEG C in the delivery temperature of the compressor, and being less than or equal to 85 DEG C, the unlatching of the electric expansion valve is controlled
Angle is 290 steps~310 steps；
When being greater than 85 DEG C in the delivery temperature of the compressor, and being less than or equal to 100 DEG C, the unlatching of the electric expansion valve is controlled
Angle is 390 steps~410 steps.
5. the control method of compressor exhaust temperature according to claim 4, which is characterized in that in the row of the compressor
Temperature degree be greater than 70 DEG C, and be less than or equal to 85 DEG C when, control the electric expansion valve opening angle be 300 steps.
6. the control method of compressor exhaust temperature according to claim 5, which is characterized in that in the row of the compressor
Temperature degree be greater than 85 DEG C, and be less than or equal to 100 DEG C when, control the electric expansion valve opening angle be 400 steps.
7. the control method of compressor exhaust temperature according to claim 4, which is characterized in that in the row of the compressor
When temperature degree is less than or equal to 70 DEG C, the compressor keeps normal recirculating oil quantity；Wherein, corresponding described of the normal recirculating oil quantity
The opening angle of electric expansion valve is 190 steps~210 steps.
8. the control method of compressor exhaust temperature according to claim 7, which is characterized in that the normal recirculating oil quantity pair
The opening angle for the electric expansion valve answered is 200 steps.
9. a kind of air conditioner characterized by comprising
Electric expansion valve, the electric expansion valve are located on the oil return line of compressor；
Exhaust gas temperature sensor, to obtain the delivery temperature of the compressor and be sent to controller system；
Controller system for comparing the delivery temperature of the compressor and multiple temperature range ranges, and determines to arrange
Temperature range range locating for temperature degree, and, the temperature range range fallen into according to the delivery temperature of the compressor controls institute
The opening angle of electric expansion valve is stated, to control the oil mass for flowing to the compressor in the oil return line.
10. air conditioner according to claim 9, which is characterized in that further include:
Storage unit, the storage unit are stored with multiple temperature range ranges, and right respectively with multiple temperature range ranges
The opening angle numerical value for the electric expansion valve answered；
The controller system includes:
Comparison unit for comparing the delivery temperature of the compressor and multiple temperature range ranges, and determines to be vented
Temperature range range locating for temperature；
Recognition unit, the temperature range range for being fallen into according to the delivery temperature of the compressor determine current electronic expansion
The opening angle numerical value of valve；
Control unit, the opening angle for electric expansion valve described in the opening angle Numerical Control according to the electric expansion valve
Degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811208742.8A CN109357439A (en) | 2018-10-17 | 2018-10-17 | A kind of control method and air conditioner of compressor exhaust temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN110230900A (en) * | 2019-07-05 | 2019-09-13 | 广东智科电子股份有限公司 | Control method, control system and the storage medium of heat pump system |
| CN113899114A (en) * | 2021-11-15 | 2022-01-07 | 宁波奥克斯电气股份有限公司 | Air conditioner and oil return control method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110230900A (en) * | 2019-07-05 | 2019-09-13 | 广东智科电子股份有限公司 | Control method, control system and the storage medium of heat pump system |
| CN113899114A (en) * | 2021-11-15 | 2022-01-07 | 宁波奥克斯电气股份有限公司 | Air conditioner and oil return control method and device |
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Application publication date: 20190219 |