CN108375256B - Automatic oil return control method and device for air conditioner - Google Patents
Automatic oil return control method and device for air conditioner Download PDFInfo
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- CN108375256B CN108375256B CN201810040563.1A CN201810040563A CN108375256B CN 108375256 B CN108375256 B CN 108375256B CN 201810040563 A CN201810040563 A CN 201810040563A CN 108375256 B CN108375256 B CN 108375256B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004378 air conditioning Methods 0.000 claims abstract description 154
- 239000003921 oil Substances 0.000 claims description 237
- 235000003642 hunger Nutrition 0.000 claims description 86
- 230000037351 starvation Effects 0.000 claims description 86
- 239000007788 liquid Substances 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 14
- 238000001704 evaporation Methods 0.000 claims description 13
- 230000008020 evaporation Effects 0.000 claims description 13
- 230000003134 recirculating effect Effects 0.000 claims description 11
- 239000003507 refrigerant Substances 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 7
- 239000010725 compressor oil Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010729 system oil Substances 0.000 description 2
- 206010041954 Starvation Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
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
-
- 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
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1932—Oil pressures
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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 invention discloses an automatic oil return control method and device for an air conditioner, wherein the method comprises the following steps: acquiring operation parameters of oil pressure, air conditioner operation power, air conditioner operation energy efficiency and compressor exhaust temperature of a compressor when the air conditioner operates; judging whether the air conditioner is in an oil-starved operation state or not according to the acquired operation parameters; and when the air conditioner is judged to be in the oil shortage running state, controlling the air conditioner to enter an oil return control mode so as to control the air conditioner to return oil. The invention solves the problem that the oil shortage judgment mode of the air conditioning unit in the prior art is not accurate enough, and improves the oil shortage judgment accuracy of the air conditioning unit and the running reliability of the air conditioning unit.
Description
Technical field
The present invention relates to air-conditioning technical fields, in particular to a kind of air-conditioning automatic oil return control method and device.
Background technique
In the During Process of Long-term Operation of cooling water air conditioner system, since system gas-liquid two-phase fluid internal circulating load is big, system is deposited again
In various valve members, there are interior leakages and the big phenomenon of pressure drop for system refrigerant and lubricating oil, meanwhile, unit is in certain special limiting conditions
Lower operation, pressure at expulsion is high, and simultaneity factor has band liquid, and system oil component efficiency is poor, causes unit oil starvation protection usually occur and stops
Machine, compressor quality life-span are a greater impact, while adversely affecting to the comfort of product with reliability in client.
Having air-conditioner set in the prior art can be realized the oil return control after air-conditioning oil starvation, but whether it is in air-conditioning
The judgment method of oil starvation state is very single, for example, the patent of invention that Patent publication No is 106152632 A of CN discloses one
Kind oil return control system and method detect pressure by pressure-detecting device, unit oil return are controlled when pressure is lower.It is this to lack
Oily detection method only judges whether air-conditioning is in oil starvation state by pressure, can not be to other characterization unit oil starvations in addition to pressure
Characteristic parameter make a response corresponding so that judgment mode is not accurate enough, the opportunity that may cause oil return control is also inadequate
Accurately, so that the protection of air-conditioner set oil starvation be caused to shut down, lead to air-conditioner set reliability decrease.
For the problem that air-conditioner set oil starvation judgment mode in the related technology is not accurate enough, effective solution is not yet proposed at present
Certainly scheme.
Summary of the invention
The present invention provides a kind of air-conditioning automatic oil return control method and devices, at least to solve air conditioner in the prior art
The not accurate enough problem of group oil starvation judgment mode.
In order to solve the above technical problems, according to an aspect of an embodiment of the present invention, providing a kind of air-conditioning automatic oil return
Control method, comprising: the oil pressure of compressor, operation of air conditioner power, operation of air conditioner efficiency and compressor row when obtaining operation of air conditioner
The operation parameters of temperature degree；According to the operation parameters of acquisition, judge whether air-conditioning is in oil starvation operating status；Determining at air-conditioning
When oil starvation operating status, control air-conditioning enters oil return control model, carries out oil return to control air-conditioning.
Further, according to the operation parameters of acquisition, judge whether air-conditioning is in oil starvation operating status, comprising: judgement fortune
Whether row parameter meets following condition simultaneously: the oil pressure of compressor is less than the initial given corresponding compressor original oil pressure of oil mass
Value reaches the first numerical value, operation of air conditioner power is less than the initial value for giving the corresponding air-conditioning initial launch frequency of oil mass and reaches second
The value that numerical value, operation of air conditioner efficiency are greater than the initial given corresponding air-conditioning initial launch efficiency of oil mass reaches third value, compression
The value that machine delivery temperature is greater than the initial given corresponding compressor initial exhaust gas temperature of oil mass reaches the 4th numerical value；In operation parameters
When meeting condition simultaneously, determine that air-conditioning is in oil starvation operating status.
Further, when determining that air-conditioning is in oil starvation operating status, control air-conditioning enters oil return control model, with control
Air-conditioning carries out oil return, comprising: the electronic expansion valve opening for increasing air-conditioning makes compressor air suction band liquid, to increase recirculating oil quantity.
Further, increase air-conditioning electronic expansion valve opening, make compressor air suction band liquid, with increase recirculating oil quantity it
Afterwards, further includes: whether the oil pressure for detecting current compressor reaches predetermined normal level；Reach in the oil pressure of current compressor and presets just
When constant value, control air-conditioning improves compressor operating temperature, so that the extra band liquid refrigerant evaporation discharge of compressor.
Further, when the oil pressure of current compressor reaches predetermined normal level, control air-conditioning improves compressor operating temperature
Degree, so that after the extra band liquid refrigerant evaporation discharge of compressor, further includes: oil return control model is directly exited, alternatively, obtaining again
It takes operation parameters when operation of air conditioner and carries out the judgement whether air-conditioning is in oil starvation operating status, determining that it is scarce that air-conditioning is not at
When oily operating status, oil return control model is exited.
Further, the oil pressure of compressor, operation of air conditioner power, operation of air conditioner efficiency and compression when obtaining operation of air conditioner
Before the operation parameters of machine delivery temperature, further includes: in response to the adjustment instruction of triggering, pass through default communication interface adjustment first
Numerical value and/or second value and/or third value and/or the 4th numerical value, wherein air-conditioning is reserved with default communication interface.
According to another aspect of an embodiment of the present invention, a kind of air-conditioning automatic oil return control device is provided, which is characterized in that
It include: acquiring unit, the oil pressure of compressor, operation of air conditioner power, operation of air conditioner efficiency and compression when for obtaining operation of air conditioner
The operation parameters of machine delivery temperature；Judging unit judges whether air-conditioning is in oil starvation operation for the operation parameters according to acquisition
State；Control unit, for when determining that air-conditioning is in oil starvation operating status, control air-conditioning to enter oil return control model, with control
Air-conditioning processed carries out oil return.
Further, judging unit includes: computing module, for judge operation parameters whether and meanwhile meet following condition:
The value that the oil pressure of compressor is less than the initial given corresponding compressor original oil pressure of oil mass reaches the first numerical value, operation of air conditioner power
Less than the initial given corresponding air-conditioning initial launch frequency of oil mass value reach second value, operation of air conditioner efficiency be greater than initially to
The value of the corresponding air-conditioning initial launch efficiency of stand oil amount reaches third value, compressor exhaust temperature is greater than initially given oil mass pair
The value for the compressor initial exhaust gas temperature answered reaches the 4th numerical value；Determining module, for operation parameters simultaneously meet condition when,
Determine that air-conditioning is in oil starvation operating status；Control unit includes: control module, for being in oil starvation operating status in the air-conditioning
When, increase the electronic expansion valve opening of air-conditioning, makes compressor air suction band liquid, to increase recirculating oil quantity.
Further, air-conditioning automatic oil return control device further include: detection unit, in the electronic expansion for increasing air-conditioning
Valve opening makes compressor air suction band liquid, and after increasing recirculating oil quantity, whether the oil pressure for detecting current compressor reaches default normal
Value；Evaporation control unit, for when the oil pressure of current compressor reaches predetermined normal level, control air-conditioning to improve compressor operating
Temperature, so that the extra band liquid refrigerant evaporation discharge of compressor；Control unit is exited, for directly exiting oil return control model, or
Person, operation parameters when obtaining operation of air conditioner again simultaneously carry out the judgement whether air-conditioning is in oil starvation operating status, determine it is empty
When tune is not at oil starvation operating status, oil return control model is exited.
Further, air-conditioning automatic oil return control device further include: adjustment unit, for being compressed when obtaining operation of air conditioner
The oil pressure of machine, operation of air conditioner power, operation of air conditioner efficiency and compressor exhaust temperature operation parameters before, in response to triggering
Adjustment instruction adjusts the first numerical value and/or second value and/or third value and/or the 4th numerical value by default communication interface,
Wherein, air-conditioning is reserved with default communication interface.
In the present invention, in order to realize air-conditioner set oil starvation early warning, air-conditioner set is protected, provided with for reflecting air conditioner
Multiple combined system parameters of group oil starvation state: oil pressure, operation of air conditioner power, operation of air conditioner efficiency and the compressor of compressor
Delivery temperature, using above-mentioned multiple combined system parameters as judgement basis to air-conditioning oil starvation whether judge.Work as above-mentioned parameter
When meeting the Rule of judgment of air-conditioning oil starvation operating status, illustrate that air-conditioning is in oil starvation operating status, control air-conditioning enters oil return control
Molding formula carries out oil return to control air-conditioning.This control mode can efficiently solve air-conditioner set oil starvation in the prior art and sentence
The not accurate enough problem of disconnected mode, improves the accuracy and unit reliability of operation of the judgement of air-conditioner set oil starvation.
Detailed description of the invention
Fig. 1 is a kind of optional flow chart of air-conditioning automatic oil return control method according to an embodiment of the present invention；
Fig. 2 is a kind of optional structural block diagram of air-conditioning automatic oil return control device according to an embodiment of the present invention；And
Fig. 3 is the optional structural block diagram of another kind of air-conditioning automatic oil return control device according to an embodiment of the present invention.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
Embodiment 1
Provide a kind of air-conditioning automatic oil return control method in the preferred embodiment of the invention 1, which can be with
It applies on air-conditioner set, for example, domestic air conditioning unit, market or workshop air-conditioner set, marine air-conditioner unit etc., this
Outside, this method can also be applied in the other equipment with air-conditioner set function.This method can be used as air-conditioner set or set
Standby upper plug-in realizes, can also be by way of the installation application (APP) on air-conditioner set or equipment or installation
The mode of software realizes that Fig. 1 shows a kind of optional flow chart of this method, as shown in Figure 1, this method comprises the following steps
S102-S106:
S102, oil pressure, operation of air conditioner power, operation of air conditioner efficiency and the compressor air-discharging of compressor when obtaining operation of air conditioner
The operation parameters of temperature；
The present invention is provided with the oil that the system parameter for reflecting air-conditioner set or equipment oil starvation state includes: compressor
Pressure, operation of air conditioner power, operation of air conditioner efficiency and compressor exhaust temperature.Wherein, the oil pressure of compressor, air-conditioning when operation of air conditioner
The operation parameters of operation power, operation of air conditioner efficiency and compressor exhaust temperature can be obtained by hardware or software, such as: compression
The oil pressure of machine is obtained by pressure sensor, and operation of air conditioner power samples to obtain by power meter, and operation of air conditioner efficiency passes through water
The software of side heat exchange amount is calculated and compressor exhaust temperature is collected by unit thermocouple.
S104 judges whether air-conditioning is in oil starvation operating status according to the operation parameters of acquisition；
The oil pressure of compressor, operation of air conditioner power, operation of air conditioner efficiency and compressor air-discharging temperature when obtaining operation of air conditioner
After the operation parameters of degree, operation parameters and the air-conditioning system oil starvation operating status that will acquire are compared, when operation parameters are same
When meeting the Rule of judgment of air-conditioning oil starvation operating status, determine that air-conditioning is in oil starvation operating status.
By analyze repeatedly and a large number of experiments discovery, air-conditioner set at runtime, initially give the corresponding pressure of stand oil groundwater increment
Oil pressure, operation of air conditioner power, operation of air conditioner efficiency and the compressor exhaust temperature of contracting machine, there is a more stable numerical value, when
After running after a period of time, when there is few oil or oil starvation due to various reasons in unit, items when compared to system stable operation
Data, multinomial data meeting associativity change, wherein the oil pressure of compressor reduces, operation of air conditioner power reduces, air-conditioning
Operational energy efficiency improves, and compressor exhaust temperature increases.That is, the oil pressure of compressor, operation of air conditioner function when operation of air conditioner
When the operation parameters of rate, operation of air conditioner efficiency and compressor exhaust temperature above-mentioned phenomenon occur simultaneously, can more accurately it illustrate
Air-conditioning is in oil starvation operating status.
According to above-mentioned principle be arranged air-conditioning oil starvation Rule of judgment, specifically include: compressor oil pressure be less than initially to
It is corresponding that the value of the corresponding compressor original oil pressure of stand oil amount reaches the first numerical value, operation of air conditioner power is less than initially given oil mass
The value of air-conditioning initial launch frequency reaches second value, operation of air conditioner efficiency is greater than the initially given corresponding air-conditioning of oil mass and initially transports
The value of row efficiency reaches third value, compressor exhaust temperature is greater than the initially given corresponding compressor initial exhaust gas temperature of oil mass
Value reach the 4th numerical value；When operation parameters meet condition simultaneously, determine that air-conditioning is in oil starvation operating status.Pass through above-mentioned sky
Whether can with accurate judgement air-conditioning be in oil starvation operating status, to realize oil starvation in time if adjusting the Rule of judgment of unit oil starvation state
Early warning.
S106, when determining that air-conditioning is in oil starvation operating status, control air-conditioning enters oil return control model, to control air-conditioning
Carry out oil return.
When determining that air-conditioning is in oil starvation operating status, control unit increases the electronic expansion valve opening of air-conditioning, makes to compress
Machine absorbing gas belt liquid, a large amount of lubricating oil are sucked compressor out of full-liquid type package again, to increase recirculating oil quantity.Increasing recirculating oil quantity
Later, whether the oil pressure for detecting current compressor reaches predetermined normal level；Reach predetermined normal level in the oil pressure of current compressor
When, control air-conditioning improves compressor operating temperature, so that the extra band liquid refrigerant evaporation discharge of compressor, so that compressor oil level returns
It reforms often.
Preferably, when the oil pressure of current compressor reaches predetermined normal level, control air-conditioning improves compressor operating temperature,
So that after the extra band liquid refrigerant evaporation discharge of compressor, further includes: oil return control model is directly exited, alternatively, obtaining again
Operation parameters when operation of air conditioner simultaneously carry out the judgement whether air-conditioning is in oil starvation operating status, are determining that air-conditioning is not at oil starvation
When operating status, oil return control model is exited, air-conditioner set operates normally.
In the above-described embodiment, in order to realize air-conditioner set oil starvation early warning, air-conditioner set is protected, provided with for reflecting
Multiple combined system parameters of air-conditioner set oil starvation state: the oil pressure of compressor, operation of air conditioner power, operation of air conditioner efficiency and
Compressor exhaust temperature, using above-mentioned multiple combined system parameters as judgement basis to air-conditioning oil starvation whether judge.When upper
When stating parameter and meeting the Rule of judgment of air-conditioning oil starvation operating status, illustrate that air-conditioning is in oil starvation operating status, control air-conditioning enters
Oil return control model carries out oil return to control air-conditioning.This control mode can efficiently solve air-conditioner set in the prior art
The not accurate enough problem of oil starvation judgment mode improves the accuracy and unit reliability of operation of the judgement of air-conditioner set oil starvation.
Another optional embodiment according to an embodiment of the present invention, when obtaining operation of air conditioner the oil pressure of compressor,
Before the operation parameters of operation of air conditioner power, operation of air conditioner efficiency and compressor exhaust temperature, further includes: in response to the tune of triggering
Whole instruction adjusts the first numerical value and/or second value and/or third value and/or the 4th numerical value by default communication interface,
In, air-conditioning is reserved with default communication interface.Different air-conditionings initially give oil pressure, the operation of air conditioner function of the corresponding compressor of oil mass
Rate, operation of air conditioner efficiency and compressor exhaust temperature be not identical, in order to enable the Rule of judgment root of air-conditioning oil starvation operating status
It is adjusted according to the actual conditions (such as model, running environment) of air-conditioning, air-conditioning is conveniently reserved with communication interface, Ke Yili in hardware
The first numerical value and/or second value and/or third value and/or the 4th numerical value under different air-conditionings are adjusted with the communication interface,
The versatility for improving air-conditioning automatic oil return control method further increases the accuracy of air-conditioning oil starvation detection.
Embodiment 2
The air-conditioning automatic oil return control method provided in preferred embodiment 1 according to the present invention, in currently preferred reality
It applies and provides a kind of air-conditioning automatic oil return control device in example 2.Fig. 2 shows a kind of optional structural block diagram of the device, such as Fig. 2
Shown, which includes:
Acquiring unit 202, the oil pressure of compressor, operation of air conditioner power, operation of air conditioner efficiency when for obtaining operation of air conditioner
With the operation parameters of compressor exhaust temperature；
Judging unit 204 is connect with acquiring unit 202, for the operation parameters according to acquisition, judges whether air-conditioning is in
Oil starvation operating status；
Control unit 206 is connect with judging unit 204, for when determining that air-conditioning is in oil starvation operating status, control to be empty
It transfers in into oil return control model, carries out oil return to control air-conditioning.
In the above-described embodiment, in order to realize air-conditioner set oil starvation early warning, air-conditioner set is protected, provided with for reflecting
Multiple combined system parameters of air-conditioner set oil starvation state: the oil pressure of compressor, operation of air conditioner power, operation of air conditioner efficiency and
Compressor exhaust temperature, using above-mentioned multiple combined system parameters as judgement basis to air-conditioning oil starvation whether judge.When upper
When stating parameter and meeting the Rule of judgment of air-conditioning oil starvation operating status, illustrate that air-conditioning is in oil starvation operating status, control air-conditioning enters
Oil return control model carries out oil return to control air-conditioning.This control mode can efficiently solve air-conditioner set in the prior art
The not accurate enough problem of oil starvation judgment mode improves the accuracy and unit reliability of operation of the judgement of air-conditioner set oil starvation.
In of the invention one optional embodiment, judging unit includes: computing module, for judging operation parameters
Whether meet following condition simultaneously: the value that the oil pressure of compressor is less than the initial given corresponding compressor original oil pressure of oil mass reaches
The value that first numerical value, operation of air conditioner power are less than the initial given corresponding air-conditioning initial launch frequency of oil mass reach second value,
The value that operation of air conditioner efficiency is greater than the initial given corresponding air-conditioning initial launch efficiency of oil mass reaches third value, compressor air-discharging
The value that temperature is greater than the initial given corresponding compressor initial exhaust gas temperature of oil mass reaches the 4th numerical value；Determining module is used for
When operation parameters meet condition simultaneously, determine that air-conditioning is in oil starvation operating status；Control unit includes: control module, is used for
When the air-conditioning is in oil starvation operating status, increase the electronic expansion valve opening of air-conditioning, makes compressor air suction band liquid, to increase back
Oil mass.
In another optional embodiment of the invention, air-conditioning automatic oil return control device further include: detection unit,
For making compressor air suction band liquid detect current compression after increasing recirculating oil quantity in the electronic expansion valve opening for increasing air-conditioning
Whether the oil pressure of machine reaches predetermined normal level；Evaporation control unit reaches predetermined normal level for the oil pressure in current compressor
When, control air-conditioning improves compressor operating temperature, so that the extra band liquid refrigerant evaporation discharge of compressor；Control unit is exited, is used
In directly exiting oil return control model, alternatively, operation parameters when obtaining operation of air conditioner again and carrying out whether air-conditioning is in scarce
The judgement of oily operating status exits oil return control model when determining that air-conditioning is not at oil starvation operating status.
In yet another alternative embodiment of the invention, air-conditioning automatic oil return control device further include: adjustment unit,
For the oil pressure of compressor, operation of air conditioner power, operation of air conditioner efficiency and compressor exhaust temperature when obtaining operation of air conditioner
Before operation parameters, in response to the adjustment instruction of triggering, the first numerical value and/or second value are adjusted by default communication interface
And/or third value and/or the 4th numerical value, wherein air-conditioning is reserved with default communication interface.
About the device in above-described embodiment, wherein each unit, module execute the concrete mode of operation related
It is described in detail in the embodiment of this method, no detailed explanation will be given here.
Another air-conditioning automatic oil return control device is provided in the preferred embodiment of the invention 2.Fig. 3 shows the device
A kind of optional structural block diagram, as shown in figure 3, the device includes:
Air-conditioner set firewire L；
Air-conditioner set zero curve N；
Program controling module is connect, for detecting air-conditioning efficiency, oil with air-conditioner set firewire L and air-conditioner set zero curve N
Pressure, power and delivery temperature, wherein efficiency calculates acquisition by experiment software, oil pressure passes through pressure sensor acquisition, function
Rate is obtained by power meter and delivery temperature is obtained by thermocouple；Execution module, with air-conditioner set firewire L and air conditioner
Group zero curve N connection, and connect with program controling module, it communicates with program controling module, is sent for receiving program controling module
Oil return control command and to program controling module send oil starvation sense command；
Electric expansion valve is connect with execution module, for receiving execution module when air-conditioning is in oil starvation operating status
Control instruction increases aperture, makes compressor air suction band liquid, and a large amount of lubricating oil are sucked compressor out of full-liquid type package again,
To increase recirculating oil quantity；
Inlet water temperature is connect with electric expansion valve, for after detection oil level meets condition, i.e. the oil pressure of current compressor
When reaching predetermined normal level, control air-conditioning improves inlet water temperature, so that the extra band liquid refrigerant evaporation discharge of compressor.
In the above-described embodiment, in order to realize air-conditioner set oil starvation early warning, air-conditioner set is protected, provided with for reflecting
Multiple combined system parameters of air-conditioner set oil starvation state: the oil pressure of compressor, operation of air conditioner power, operation of air conditioner efficiency and
Compressor exhaust temperature, using above-mentioned multiple combined system parameters as judgement basis to air-conditioning oil starvation whether judge.When upper
When stating parameter and meeting the Rule of judgment of air-conditioning oil starvation operating status, illustrate that air-conditioning is in oil starvation operating status, control air-conditioning enters
Oil return control model carries out oil return to control air-conditioning.This control mode can efficiently solve air-conditioner set in the prior art
The not accurate enough problem of oil starvation judgment mode improves the accuracy and unit reliability of operation of the judgement of air-conditioner set oil starvation.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
The common knowledge in the art that person's adaptive change follows general principle of the invention and do not invent including the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (9)
1. a kind of air-conditioning automatic oil return control method characterized by comprising
The oil pressure of compressor when obtaining operation of air conditioner, operation of air conditioner power, operation of air conditioner efficiency and compressor exhaust temperature fortune
Row parameter；
According to the operation parameters of acquisition, judge whether the air-conditioning is in oil starvation operating status；
It when determining that the air-conditioning is in the oil starvation operating status, controls the air-conditioning and enters oil return control model, with control
The air-conditioning carries out oil return；
Wherein, the operation parameters according to acquisition, judge whether the air-conditioning is in oil starvation operating status, comprising:
Judge the operation parameters whether and meanwhile meet following condition:
The value that the oil pressure of the compressor is less than the initial given corresponding compressor original oil pressure of oil mass reaches the first numerical value, described
The value that operation of air conditioner power is less than the initial given corresponding air-conditioning initial launch frequency of oil mass reaches second value, the sky
The value for adjusting operational energy efficiency to be greater than the initial given corresponding air-conditioning initial launch efficiency of oil mass reaches third value, the compression
The value that machine delivery temperature is greater than the initial given corresponding compressor initial exhaust gas temperature of oil mass reaches the 4th numerical value；
When the operation parameters meet the condition simultaneously, determine that the air-conditioning is in oil starvation operating status.
2. the method according to claim 1, wherein described be in oil starvation operation shape in the judgement air-conditioning
It when state, controls the air-conditioning and enters oil return control model, carry out oil return to control the air-conditioning, comprising:
The electronic expansion valve opening for increasing the air-conditioning makes compressor air suction band liquid, to increase recirculating oil quantity.
3. according to the method described in claim 2, it is characterized in that, in the electronic expansion valve opening for increasing the air-conditioning,
Make compressor air suction band liquid, after increasing recirculating oil quantity, further includes:
Whether the oil pressure of detection current compressor reaches predetermined normal level；
When the oil pressure of current compressor reaches the predetermined normal level, controls the air-conditioning and improve compressor operating temperature, with
Make the extra band liquid refrigerant evaporation discharge of compressor.
4. according to the method described in claim 3, it is characterized in that, the current compressor oil pressure reach it is described it is default just
It when constant value, controls the air-conditioning and improves compressor operating temperature, so as to also be wrapped after the extra band liquid refrigerant evaporation discharge of compressor
It includes:
The oil return control model is directly exited, alternatively, described in the operation parameters and progress when obtaining operation of air conditioner again
Whether air-conditioning is in the judgement of oil starvation operating status, when determining that the air-conditioning is not at the oil starvation operating status, exits institute
State oil return control model.
5. the method according to claim 1, wherein it is described acquisition operation of air conditioner when compressor oil pressure, sky
Before the operation parameters for allocating and transporting row power, operation of air conditioner efficiency and compressor exhaust temperature, further includes:
In response to the adjustment instruction of triggering, first numerical value and/or second value and/or the are adjusted by default communication interface
Three numerical value and/or the 4th numerical value, wherein the air-conditioning is reserved with the default communication interface.
6. a kind of air-conditioning automatic oil return control device characterized by comprising
Acquiring unit, the oil pressure of compressor, operation of air conditioner power, operation of air conditioner efficiency and compressor when for obtaining operation of air conditioner
The operation parameters of delivery temperature；
Judging unit judges whether the air-conditioning is in oil starvation operating status for the operation parameters according to acquisition；
Control unit, for controlling the air-conditioning and entering oil return control when determining that the air-conditioning is in the oil starvation operating status
Molding formula carries out oil return to control the air-conditioning；
Wherein, the judging unit includes:
Computing module, for judge the operation parameters whether and meanwhile meet following condition:
The value that the oil pressure of the compressor is less than the initial given corresponding compressor original oil pressure of oil mass reaches the first numerical value, described
The value that operation of air conditioner power is less than the initial given corresponding air-conditioning initial launch frequency of oil mass reaches second value, the sky
The value for adjusting operational energy efficiency to be greater than the initial given corresponding air-conditioning initial launch efficiency of oil mass reaches third value, the compression
The value that machine delivery temperature is greater than the initial given corresponding compressor initial exhaust gas temperature of oil mass reaches the 4th numerical value；
Determining module, for when the operation parameters meet the condition simultaneously, determining that the air-conditioning is in oil starvation operation shape
State.
7. device according to claim 6, which is characterized in that
Described control unit includes:
Control module, for increasing the electronic expansion valve opening of the air-conditioning, making when the air-conditioning is in oil starvation operating status
Compressor air suction band liquid, to increase recirculating oil quantity.
8. device according to claim 7, which is characterized in that further include:
Detection unit, for making compressor air suction band liquid, to increase back in the electronic expansion valve opening for increasing the air-conditioning
After oil mass, whether the oil pressure for detecting current compressor reaches predetermined normal level；
Evaporation control unit is improved for when the oil pressure of current compressor reaches the predetermined normal level, controlling the air-conditioning
Compressor operating temperature, so that the extra band liquid refrigerant evaporation discharge of compressor；
Control unit is exited, for directly exiting the oil return control model, alternatively, fortune when obtaining operation of air conditioner again
Row parameter simultaneously carries out the judgement whether air-conditioning is in oil starvation operating status, is not at the oil starvation fortune in the judgement air-conditioning
When row state, the oil return control model is exited.
9. device according to claim 6, which is characterized in that further include:
Adjustment unit, in the acquisition operation of air conditioner oil pressure of compressor, operation of air conditioner power, operation of air conditioner efficiency and
Before the operation parameters of compressor exhaust temperature, in response to the adjustment instruction of triggering, described the is adjusted by default communication interface
One numerical value and/or second value and/or third value and/or the 4th numerical value, wherein the air-conditioning is reserved with the default communication
Interface.
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| CN109114844B (en) * | 2018-08-13 | 2020-02-14 | 珠海格力电器股份有限公司 | Oil return control method of air conditioner compressor unit |
| CN110296547B (en) * | 2019-07-04 | 2020-04-21 | 宁波奥克斯电气股份有限公司 | Multi-split oil return control method and system and air conditioner |
| CN110736239B (en) * | 2019-10-29 | 2020-10-20 | 珠海格力电器股份有限公司 | Method and device for determining lubricating oil allowance in air conditioner |
| CN110762901B (en) * | 2019-11-11 | 2022-01-18 | 宁波奥克斯电气股份有限公司 | Auxiliary oil return control method and device and air conditioner |
| CN114279060B (en) * | 2020-09-28 | 2023-05-26 | 广东美的制冷设备有限公司 | Air conditioner and control method and equipment for electronic expansion valve of indoor unit of air conditioner |
| CN115200264B (en) * | 2022-07-07 | 2023-10-10 | 珠海格力电器股份有限公司 | Oil return control method and device and air conditioner |
| CN117450693B (en) * | 2023-12-25 | 2024-05-03 | 珠海格力电器股份有限公司 | Compressor oil return control method and device, computer equipment and storage medium |
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