CN109282447A - A kind of control method preventing pipeline vibration and air conditioner - Google Patents
A kind of control method preventing pipeline vibration and air conditioner Download PDFInfo
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- CN109282447A CN109282447A CN201811089385.8A CN201811089385A CN109282447A CN 109282447 A CN109282447 A CN 109282447A CN 201811089385 A CN201811089385 A CN 201811089385A CN 109282447 A CN109282447 A CN 109282447A
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- compressor
- solenoid valve
- runing time
- electric expansion
- expansion valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of control method for preventing pipeline vibration and air conditioners, are related to air-conditioning technical field, and the control method for preventing pipeline vibration includes the following steps: to obtain compressor operating time；Judge whether the compressor operating time is greater than the first default runing time；According to compressor operating frequency and the aperture of system pressure adjustment electric expansion valve to setting step number；Control the operation of solenoid valve.The control method of the present invention for preventing pipeline vibration tentatively judges that air conditioner enters low-frequency operation shape probability of state first by the way that the runing time of compressor to be compared with the first preset time；After determining that the runing time of compressor reaches the first default runing time, the aperture of electric expansion valve is adjusted with system pressure further according to the running frequency of compressor, and controls the operation of solenoid valve, and then slow down the vibration of pipeline, reduce pipeline stress, improves the stability and safety of air conditioner operation.
Description
Technical field
The present invention relates to air conditioner technical field, in particular to a kind of control method for preventing pipeline vibration and air conditioner.
Background technique
At present air conditioner in the process of running, low-frequency operation for a period of time after, it is serious to easily cause pipeline vibration, causes pipe
Road stress increases, thus the hidden danger disconnected there are pipeline vibration.
Summary of the invention
In view of this, the present invention is directed to propose a kind of control method for preventing pipeline vibration, is shaken with solving air-conditioner hose
Move serious problem.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of control method preventing pipeline vibration, includes the following steps:
Obtain the runing time of compressor；
Judge whether the runing time of the compressor is greater than the first default runing time；
When determining that the runing time of the compressor is greater than the first default runing time, according to the fortune of the compressor
Line frequency and the aperture of system pressure adjustment electric expansion valve are to setting step number；
Control is set to the operation of the solenoid valve of refrigerant return branch road, is adjusted by controlling the operation of the solenoid valve
The pressure of the compressor inlet side.
Further, the running frequency according to compressor and the aperture of system pressure adjustment electric expansion valve are extremely set
Step number includes:
Detect the running frequency of the compressor；
Judge whether the running frequency of the compressor is lower than frequency given threshold；
When determining the running frequency of the compressor lower than the frequency given threshold, the system pressure is detected；
Judge whether the system pressure is lower than pressure given threshold；
When determining the system pressure lower than the pressure given threshold, the aperture for adjusting the electric expansion valve is extremely set
Step number.
Further, the solenoid valve is check valve.
Further, it is described control solenoid valve operation include:
The solenoid valve is opened, and records the runing time of the solenoid valve；
Judge whether the runing time of the solenoid valve is greater than the second default runing time；
When determining that the runing time of the solenoid valve is greater than the second default runing time, the solenoid valve is closed.
Further, the running frequency according to compressor and the aperture of system pressure adjustment electric expansion valve are extremely set
Step number includes:
The electric expansion valve is adjusted according to the running frequency of the compressor and the pressure of the compressor air-discharging pipeline
Aperture to setting step number.
Compared with the existing technology, the control method of the present invention for preventing pipeline vibration has the advantage that
(1) control method of the present invention for preventing pipeline vibration, first by by the runing time of compressor and the
One preset time is compared, and tentatively judges that air conditioner enters low-frequency operation shape probability of state；Determine the runing time of compressor
After reaching the first default runing time, the aperture of electric expansion valve is adjusted with system pressure further according to the running frequency of compressor
To setting step number, so that resonance point of the running frequency of compressor far from itself, and refrigerant is further adjusted by solenoid valve
Reflux, mitigate system loading, and then slow down the vibration of pipeline, reduce pipeline stress, improve the stability of air conditioner operation with
Safety.
(2) control method of the present invention for preventing pipeline vibration, reach first in the runing time for determining compressor
After default runing time, the running frequency of compressor is detected, if the running frequency of compressor sets threshold not less than frequency
Value, then be not adjusted the operating condition of air conditioner；When the running frequency of compressor is lower than frequency given threshold, further
Detection system pressure is not adjusted the operating condition of air conditioner if system pressure is not less than pressure given threshold；When being
When pressure of uniting is lower than pressure given threshold, the aperture of electric expansion valve is adjusted to setting step number, so as to adjust refrigerant in pipeline
Flow, change system pressure load, slow down pipeline vibration, reduce pipeline stress.
Another object of the present invention is to propose a kind of air conditioner, to solve the problems, such as air-conditioner hose serious vibration.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of air conditioner, the air conditioner include:
Compressor, for being compressed to refrigerant；
Outdoor heat exchanger exchanges heat for the refrigerant to the exhaust outlet of compressor；The outdoor heat exchanger with it is described
The exhaust outlet of compressor is connected；
Indoor heat exchanger exchanges heat for the refrigerant to the compressor inlet；The indoor heat exchanger with it is described
The air inlet of compressor is connected；
Electric expansion valve, for adjusting the flow of the refrigerant；The electric expansion valve is set to the outdoor heat exchanger
On pipeline between the indoor heat exchanger；
Solenoid valve, for adjusting the pressure of the compressor inlet side；The solenoid valve is set to refrigerant return branch
On, one end of the refrigerant return branch is connected on the pipeline between the electric expansion valve and the indoor heat exchanger, institute
The other end for stating refrigerant return branch is connected to the air inlet side of the compressor；
Control device, for controlling the operation of the compressor, the electric expansion valve and the solenoid valve；The pressure
Contracting machine, the electric expansion valve, the solenoid valve are communicated to connect with the control device.
Further, the control device controls the fortune of the compressor, the electric expansion valve and the solenoid valve
Row includes the following steps:
Obtain the runing time of the compressor；
Judge whether the runing time of the compressor is greater than the first default runing time；
When determining that the compressor operating time is greater than the first default runing time, according to the operation of the compressor
Frequency and system pressure adjust the aperture of the electric expansion valve to setting step number；
Control is set to the operation of the solenoid valve of refrigerant return branch road, is adjusted by controlling the operation of the solenoid valve
The pressure of the compressor inlet side.
Further, the control device adjusts electric expansion valve according to the running frequency and system pressure of the compressor
Aperture to setting step number include the following steps:
Detect the running frequency of the compressor；
Judge whether the running frequency of the compressor is lower than frequency given threshold；
When determining the running frequency of the compressor lower than the frequency given threshold, the system pressure is detected；
Judge whether the system pressure is lower than pressure given threshold；
When determining the system pressure lower than the pressure given threshold, the aperture for adjusting the electric expansion valve is extremely set
Step number.
Further, the control device controls the operation of the solenoid valve and includes:
The solenoid valve is opened, and records the runing time of the solenoid valve；
Judge whether the runing time of the solenoid valve is greater than the second default runing time；
When determining that the runing time of the solenoid valve is greater than the second default runing time, the solenoid valve is closed.
Further, the running frequency according to compressor and the aperture of system pressure adjustment electric expansion valve are extremely set
Step number includes:
The electric expansion valve is adjusted according to the running frequency of the compressor and the pressure of the compressor air-discharging pipeline
Aperture to setting step number
Possessed advantage is identical compared with the existing technology with the above-mentioned control method for preventing pipeline vibration for the air conditioner,
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 flow chart that pipeline vibration is prevented described in the embodiment of the present invention；
Fig. 2 is to adjust opening for electric expansion valve according to compressor operating frequency and system pressure described in the embodiment of the present invention
The flow chart of degree；
Fig. 3 is the flow chart of control surfacing solenoid valve operation described in the embodiment of the present invention；
Fig. 4 is the flow chart that control device described in the embodiment of the present invention controls coolant circulating system operation.
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 1
After air conditioner runs a period of time, indoor environment temperature is close to set temperature, at this time the running frequency meeting of air conditioner
It reduces, the compressor of air conditioner is easily run near the resonance point of itself；When compressor is run near the resonance point of itself,
Vibration strongly is had, thus the vibration for driving pipe-line system strong；To improve stabilization of the air conditioner in low-frequency operation
Property, shown in Figure 1, the present embodiment provides a kind of control method for preventing pipeline vibration, which includes the following steps:
S1: the runing time of compressor is obtained；
S2: judging whether the runing time of compressor is greater than the first default runing time, determines that compressor operating time is big
When the first default runing time, S3 is entered step, S1 is otherwise entered step；
S3: according to the running frequency of compressor and the aperture of system pressure adjustment electric expansion valve to setting step number；
S4: control is set to the operation of the solenoid valve of refrigerant return branch road, is adjusted by controlling the operation of solenoid valve
The pressure of compressor inlet side.
Control method provided in this embodiment first remembers the runing time of compressor after air conditioner unlatching
Record, and the runing time of the compressor is compared with the preset first default runing time, pass through compressor operating time
With the comparison result of the first default runing time, tentatively judge that compressor enters low-frequency operation shape probability of state；Wherein first is pre-
If runing time can be debugged according to the performance of compressor, such as the first default runing time can be set as to 5 minutes, 8 points
Clock, 15 minutes etc..
If the runing time of compressor is not more than the first default runing time, tentatively judge that compressor enters low-frequency operation
Shape probability of state is smaller, continues to record the runing time of compressor, and when by the runing time with the first default operation
Between be compared, until compressor runing time be greater than the first default runing time, judge at this time compressor enter low frequency transport
Row shape probability of state is larger；The aperture of electric expansion valve is further adjusted extremely according to the running frequency of compressor and system pressure
Step number is set, the aperture of electric expansion valve is made to maintain equilibrium state with running frequency to inhibit to vibrate；Wherein electric expansion valve
It is set on the pipeline between outdoor heat exchanger and indoor heat exchanger, therefore, is adjusted by the aperture to electric expansion valve,
The flow of adjustable refrigerant changes the running frequency of compressor so that compressor assembly pressure load changes, from
And make the running frequency of compressor far from the resonance point of its own, and then pipeline vibration and stress reduce, it improves air conditioner and exists
Stability when low-frequency operation.
Since the resonance point of each compressor is different, corresponding electric expansion valve setting step number is also different, while compressor
When in different running frequencies, the setting step number of electric expansion valve is also changed correspondingly, i.e., the setting step number of electric expansion valve with
The resonance point and the real-time running frequency of compressor of corresponding compressor are related, the tool of the setting step number of each electric expansion valve
Body numerical value can be determined according to the resonance point of corresponding compressor and the real-time running frequency of compressor, so that by electronic expansion
The aperture of valve is adjusted to when setting step number, and the running frequency of corresponding compressor can be far from its own resonance point, to slow down
Vibration improves the stability of air conditioner operation；Specifically, such as according to the resonance point of compressor, by corresponding electric expansion valve
Setting step number is set as 50 steps, 60 steps etc..
For slowing down vibration, the present embodiment is further adjusted the flow of refrigerant by solenoid valve.Solenoid valve is single
To valve, it is set to refrigerant return branch road；Wherein refrigerant return branch is for adjusting refrigerant from electric expansion valve and indoor heat exchange
To the reflux of compressor inlet side at pipeline between device, one end of refrigerant return branch is connected to the air inlet side of compressor
Surfacing mouth, the other end is connected on the pipeline between electric expansion valve and indoor heat exchanger.When solenoid valve is opened, from electronics
The part refrigerant come out in expansion valve leads to the surfacing mouth that refrigerant return branch returns to compressor inlet side, and system loading can occur
Variation slows down pipeline vibration, reduces pipeline stress, improves the stability and safety of air conditioner operation.
After the runing time of compressor reaches the first default runing time, according to the running frequency of compressor and system pressure
Power adjusts the aperture of electric expansion valve, so that the running frequency and system pressure phase of the aperture of electric expansion valve and compressor
Matching, and then slow down the vibration of pipeline.
The control method provided in this embodiment for preventing pipeline vibration, first by by the runing time of compressor and first
Preset time is compared, and tentatively judges that air conditioner enters low-frequency operation shape probability of state；Determine that the runing time of compressor reaches
To after the first default runing time, the aperture of electric expansion valve is adjusted extremely with system pressure further according to the running frequency of compressor
Set step number so that resonance point of the running frequency of compressor far from itself, and further adjusted by solenoid valve refrigerant from
To the reflux of compressor inlet side at pipeline between electric expansion valve and indoor heat exchanger, mitigate system loading, and then subtracts
The vibration of slow pipeline, reduces pipeline stress, improves the stability and safety of air conditioner operation.
Embodiment 2
On the basis of embodiment 1, shown in Figure 2, according to the running frequency of compressor and system pressure in the present embodiment
The aperture of power adjustment electric expansion valve extremely sets step number
S31: the running frequency of compressor is detected；
S32: judging whether the running frequency of compressor is lower than frequency given threshold, determines that the running frequency of compressor is lower than
When frequency given threshold, S33 is entered step, S31 is otherwise entered step；
S33: detection system pressure；
S34: judging whether system pressure is lower than pressure given threshold, when decision-making system pressure is lower than pressure given threshold,
S35 is entered step, S33 is otherwise entered step；
S35: the aperture of electric expansion valve is adjusted to setting step number.
After determining that compressor operating time reaches the first default runing time, the running frequency of compressor is detected, and sentence
Whether the running frequency of disconnected compressor is lower than frequency given threshold；If the running frequency of compressor is not less than frequency given threshold,
Then judge that pipeline vibration situation is not serious, be adjusted without the operating condition to air conditioner, continues to test the operation of compressor
Frequency, and the compressor operating frequency that will test is compared with frequency given threshold, until compressor operating frequency is lower than frequency
Rate given threshold.
When determining that compressor operating frequency is lower than frequency given threshold, detection system pressure, and by system pressure and press
Power given threshold is compared；If system pressure is not less than pressure given threshold, still judge without the operation feelings to air conditioner
Condition is adjusted, and continues to test system pressure, and system pressure detected is compared with pressure given threshold, until being
Pressure of uniting is lower than pressure given threshold, judges that pipeline vibration is serious at this time, to slow down pipeline vibration, improves the steady of air conditioner operation
It is qualitative, the aperture of electric expansion valve is adjusted, the aperture of electric expansion valve is adjusted to setting step number, so as to adjust pipeline
The flow of middle refrigerant changes system pressure load, the running frequency of regulating system, so that the running frequency of system is far from compressor
The resonance point of itself reduces pipeline stress to slow down pipeline vibration.
Frequency given threshold and pressure given threshold in the present embodiment set occurrence all in accordance with practical type, such as will
Frequency given threshold is set as 30Hz, 40Hz etc., and pressure given threshold is set as 4MPa, 4.1Mpa, 4.2Mpa etc..
The control method provided in this embodiment for preventing pipeline vibration is determining that it is pre- that the runing time of compressor reaches first
If after runing time, being detected to the running frequency of compressor, if the running frequency of compressor is not less than frequency given threshold,
The operating condition of air conditioner is not adjusted then；When the running frequency of compressor is lower than frequency given threshold, further examine
Examining system pressure is not adjusted the operating condition of air conditioner if system pressure is not less than pressure given threshold；Work as system
When pressure is lower than pressure given threshold, the aperture of electric expansion valve is adjusted to setting step number, so as to adjust refrigerant in pipeline
Flow changes system pressure load, slows down pipeline vibration, reduces pipeline stress.
Embodiment 3
It is shown in Figure 3 on the basis of embodiment 2, it is adjusted in the present embodiment in the aperture to electric expansion valve
Afterwards, the further operation of control solenoid valve, wherein the operation of control solenoid valve includes:
S41: opens solenoid valve, and record the runing time of solenoid valve；
S42: judging whether the runing time of solenoid valve is greater than the second default runing time, determines the runing time of solenoid valve
When greater than the second default runing time, S43 is entered step, S41 is otherwise entered step；
S43: solenoid valve is closed.
Solenoid valve is set to refrigerant return branch road, since one end of refrigerant return branch is connected to electric expansion valve and room
On pipeline between interior heat exchanger, the other end is connected to the surfacing mouth of compressor inlet side, and electric expansion valve is set to pressure
The high-pressure side of contracting machine, therefore refrigerant return branch is connected the pressure of one end with the pipeline between electric expansion valve and indoor heat exchanger
Power is greater than the refrigerant return branch and is connected with compressor inlet the pressure of one end, therefore is set to the electromagnetism of refrigerant return branch road
The normal condition of valve is in off state, in case the refrigerant come out in air conditioner normal course of operation from electric expansion valve is without interior
Heat exchanger is directly entered compressor, influences the stability of air conditioner operation and the performance of air conditioner.
After being adjusted to the aperture of electric expansion valve, the cold medium flux for entering the room heat exchanger changes, system pressure
Power also changes correspondingly, and for the stability for improving air conditioner operation, slows down pipeline vibration, will be set to the electricity of refrigerant return branch road
Magnet valve is opened, i.e., so that between pipeline and compressor between electric expansion valve and indoor heat exchanger by refrigerant return branch into
Row connection, so that the refrigerant to air inlet side in compressor supplements, so that system pressure load be made to change, slows down pipe
The vibration on road reduces pipeline stress.
Timing is carried out while solenoid valve is opened, records the runing time of solenoid valve, when the runing time of solenoid valve reaches
When to the second default runing time, solenoid valve is closed, system runs smoothly at this time, and pipeline vibration is retarded, to improve
The safety of pipeline.
Second default runing time can be debugged according to the performance of compressor, can such as be set the second default runing time
It is 10 seconds, 15 seconds etc..
The system pressure mentioned in the present embodiment includes the pressure of compressor air-discharging pipeline, i.e., the system pressure in the present embodiment
Power refers to high side pressure.
The control method provided in this embodiment for preventing pipeline vibration will after being adjusted to the aperture of electric expansion valve
The solenoid valve for being set to refrigerant return branch road is opened, and is adjusted to the flow of refrigerant, is mended to the refrigerant in compressor
It fills, when the runing time of solenoid valve reaches the second default runing time, closes solenoid valve, system runs smoothly at this time, pipeline
Vibrate it is retarded, to improve the safety of pipeline.
Embodiment 4
The present embodiment provides a kind of air conditioner, which includes:
Compressor, for being compressed to refrigerant；
Outdoor heat exchanger exchanges heat for the refrigerant to exhaust outlet of compressor；The exhaust of outdoor heat exchanger and compressor
Mouth is connected；
Indoor heat exchanger exchanges heat for the refrigerant to compressor inlet；The air inlet of indoor heat exchanger and compressor
Mouth is connected；
Electric expansion valve, for adjusting the flow of refrigerant；Electric expansion valve is set to outdoor heat exchanger and indoor heat exchanger
Between pipeline on；
Solenoid valve, for adjusting the pressure of compressor inlet side；Solenoid valve is set to refrigerant return branch road, and refrigerant returns
One end of stream branch is connected on the pipeline between electric expansion valve and indoor heat exchanger, the other end connection of refrigerant return branch
In the air inlet side of compressor；
Control device, for controlling compressor, electric expansion valve and the operation of solenoid valve；Compressor, electric expansion valve,
Solenoid valve is communicated to connect with control device.
Compressor, outdoor heat exchanger, indoor heat exchanger, electric expansion valve, solenoid valve collectively form the circulatory system of refrigerant；
When air conditioner is run, control device controls following for refrigerant by the operation of control compressor, electric expansion valve and solenoid valve
Ring is adjusted the running frequency of system, so that resonance point of the running frequency far from compressor itself, so that it is negative to mitigate system
Lotus, and then slow down the vibration of pipeline, reduce pipeline stress, improves the stability and safety of air conditioner operation.
Embodiment 5
On the basis of embodiment 4, control device controls compressor, electric expansion valve and solenoid valve in the present embodiment
Operation includes the following steps:
S1: the runing time of compressor is obtained；
S2: judging whether the runing time of compressor is greater than the first default runing time, determines that compressor operating time is big
When the first default runing time, S3 is entered step, S1 is otherwise entered step；
S3: according to the running frequency of compressor and the aperture of system pressure adjustment electric expansion valve to setting step number；
S4: control is set to the operation of the solenoid valve of refrigerant return branch road, is adjusted by controlling the operation of solenoid valve
The pressure of compressor inlet side.
First by the way that the runing time of compressor to be compared with the first preset time in the present embodiment, preliminary judgement is empty
Device is adjusted to enter low-frequency operation shape probability of state；After determining that the runing time of compressor reaches the first default runing time, further according to
The running frequency of compressor adjusts the aperture of electric expansion valve with system pressure to step number is set, so that the operation frequency of compressor
Rate further adjusts refrigerant between electric expansion valve and indoor heat exchanger far from itself resonance point by solenoid valve
To the reflux of compressor inlet side at pipeline, mitigate system loading, and then slow down the vibration of pipeline, reduces pipeline stress, mention
The stability and safety of high air conditioner operation.
Embodiment 6
On the basis of embodiment 5, control device is according to the running frequency of compressor and system pressure tune in the present embodiment
The aperture of whole electric expansion valve to setting step number includes the following steps:
S31: the running frequency of compressor is detected；
S32: judging whether the running frequency of compressor is lower than frequency given threshold, determines that the running frequency of compressor is lower than
When frequency given threshold, S33 is entered step, S31 is otherwise entered step；
S33: detection system pressure；
S34: judging whether system pressure is lower than pressure given threshold, when decision-making system pressure is lower than pressure given threshold,
S35 is entered step, S33 is otherwise entered step；
S35: the aperture of electric expansion valve is adjusted to setting step number.
The present embodiment is after the runing time for determining compressor reaches the first default runing time, to the operation frequency of compressor
Rate is detected, if the running frequency of compressor is not less than frequency given threshold, is not adjusted to the operating condition of air conditioner
It is whole；When the running frequency of compressor is lower than frequency given threshold, further detection system pressure, if system pressure is not less than pressure
Power given threshold is not adjusted the operating condition of air conditioner then；When system pressure is lower than pressure given threshold, by electronics
The aperture of expansion valve is adjusted to setting step number, so as to adjust the flow of refrigerant in pipeline, is changed system pressure load, is slowed down pipeline
Vibration reduces pipeline stress.
Embodiment 7
On the basis of embodiment 6, the operation of control device control surfacing solenoid valve includes: in the present embodiment
S41: opens solenoid valve, and record the runing time of solenoid valve；
S42: judging whether the runing time of solenoid valve is greater than the second default runing time, determines the runing time of solenoid valve
When greater than the second default runing time, S43 is entered step, S41 is otherwise entered step；
S43: solenoid valve is closed.
Air conditioner provided in this embodiment after being adjusted to the aperture of electric expansion valve, will be set to refrigerant return branch
The solenoid valve of road is opened, and is adjusted to the flow of refrigerant, is supplemented the refrigerant in compressor, when the operation of solenoid valve
When time reaches the second default runing time, solenoid valve is closed, system runs smoothly at this time, and pipeline vibration is retarded, thus
Improve the safety of pipeline.
To sum up, described referring to fig. 4, air conditioner provided by the invention controls the fortune of coolant circulating system by control device
Row, specific control process are as follows:
S1: the runing time of compressor is obtained；
S2: judging whether the runing time of compressor is greater than the first default runing time, determines that compressor operating time is big
When the first default runing time, S31 is entered step, S1 is otherwise entered step；
S31: the running frequency of compressor is detected；
S32: judging whether the running frequency of compressor is lower than frequency given threshold, determines that the running frequency of compressor is lower than
When frequency given threshold, S33 is entered step, S31 is otherwise entered step；
S33: detection system pressure；
S34: judging whether system pressure is lower than pressure given threshold, when decision-making system pressure is lower than pressure given threshold,
S35 is entered step, S33 is otherwise entered step；
S35: the aperture of electric expansion valve is adjusted to setting step number；
S41: opens solenoid valve, and record the runing time of solenoid valve；
S42: judging whether the runing time of solenoid valve is greater than the second default runing time, determines the runing time of solenoid valve
When greater than the second default runing time, S43 is entered step, S41 is otherwise entered step；
S43: solenoid valve is closed.
The system pressure mentioned in the present embodiment includes the pressure of compressor air-discharging pipeline, i.e., the system pressure in the present embodiment
Power refers to high side pressure；Specifically, extremely according to the running frequency of compressor and the aperture of system pressure adjustment electric expansion valve
Setting step number includes:
It is extremely set according to the aperture of the running frequency of compressor and the pressure of compressor air-discharging pipeline adjustment electric expansion valve
Step number.
The aperture for adjusting electric expansion valve according to the runing time of compressor, running frequency and system pressure first, makes
The running frequency and system pressure of the aperture and compressor that obtain electric expansion valve match；The aperture of electric expansion valve is carried out
After adjustment, further the solenoid valve for being set to refrigerant return branch road is opened, when the runing time of solenoid valve reaches second in advance
If when runing time, closing solenoid valve, system runs smoothly at this time, and pipeline vibration is retarded, to improve the peace of pipeline
Quan Xing.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and 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 for preventing pipeline vibration, which comprises the steps of:
Obtain the runing time of compressor；
Judge whether the runing time of the compressor is greater than the first default runing time；
When determining that the runing time of the compressor is greater than the first default runing time, according to the operation of compressor frequency
Rate and the aperture of system pressure adjustment electric expansion valve are to setting step number；
Control is set to the operation of the solenoid valve of refrigerant return branch road, is adjusted by controlling the operation of the solenoid valve described
The pressure of compressor inlet side.
2. the control method according to claim 1 for preventing pipeline vibration, which is characterized in that the fortune according to compressor
Line frequency and aperture to the setting step number of system pressure adjustment electric expansion valve include:
Detect the running frequency of the compressor；
Judge whether the running frequency of the compressor is lower than frequency given threshold；
When determining the running frequency of the compressor lower than the frequency given threshold, the system pressure is detected；
Judge whether the system pressure is lower than pressure given threshold；
When determining the system pressure lower than the pressure given threshold, the aperture of the electric expansion valve is adjusted to setting step
Number.
3. the control method according to claim 2 for preventing pipeline vibration, which is characterized in that the solenoid valve is unidirectional
Valve.
4. the control method according to claim 1 for preventing pipeline vibration, which is characterized in that the control is set to refrigerant
The operation of solenoid valve of branch road of flowing back includes:
The solenoid valve is opened, and records the runing time of the solenoid valve；
Judge whether the runing time of the solenoid valve is greater than the second default runing time；
When determining that the runing time of the solenoid valve is greater than the second default runing time, the solenoid valve is closed.
5. the control method according to claim 1-4 for preventing pipeline vibration, which is characterized in that described according to pressure
The running frequency of contracting machine and aperture to the setting step number of system pressure adjustment electric expansion valve include:
Opening for the electric expansion valve is adjusted according to the running frequency of the compressor and the pressure of the compressor air-discharging pipeline
Degree extremely setting step number.
6. a kind of air conditioner, which is characterized in that the air conditioner includes:
Compressor, for being compressed to refrigerant；
Outdoor heat exchanger exchanges heat for the refrigerant to the exhaust outlet of compressor；The outdoor heat exchanger and the compression
The exhaust outlet of machine is connected；
Indoor heat exchanger exchanges heat for the refrigerant to the compressor inlet；The indoor heat exchanger and the compression
The air inlet of machine is connected；
Electric expansion valve, for adjusting the flow of the refrigerant；The electric expansion valve is set to the outdoor heat exchanger and institute
It states on the pipeline between indoor heat exchanger；
Solenoid valve, for adjusting the pressure of the compressor inlet side；The solenoid valve is set to refrigerant return branch road, institute
The one end for stating refrigerant return branch is connected on the pipeline between the electric expansion valve and the indoor heat exchanger, the refrigerant
The other end of reflux branch is connected to the air inlet side of the compressor；
Control device, for controlling the operation of the compressor, the electric expansion valve and the solenoid valve；The compression
Machine, the electric expansion valve, the solenoid valve are communicated to connect with the control device.
7. air conditioner according to claim 6, which is characterized in that the control device controls the compressor, the electricity
The operation of sub- expansion valve and the solenoid valve includes the following steps:
Obtain the runing time of the compressor；
Judge whether the runing time of the compressor is greater than the first default runing time；
When determining that the compressor operating time is greater than the first default runing time, according to the running frequency of the compressor
The aperture of the electric expansion valve is adjusted to setting step number with system pressure；
Control is set to the operation of the solenoid valve of refrigerant return branch road, is adjusted by controlling the operation of the solenoid valve described
The pressure of compressor inlet side.
8. air conditioner according to claim 7, which is characterized in that the control device is according to the operation of compressor frequency
Rate and aperture to the setting step number of system pressure adjustment electric expansion valve include the following steps:
Detect the running frequency of the compressor；
Judge whether the running frequency of the compressor is lower than frequency given threshold；
When determining the running frequency of the compressor lower than the frequency given threshold, the system pressure is detected；
Judge whether the system pressure is lower than pressure given threshold；
When determining the system pressure lower than the pressure given threshold, the aperture of the electric expansion valve is adjusted to setting step
Number.
9. air conditioner according to claim 8, which is characterized in that the control device controls the operation packet of the solenoid valve
It includes:
The solenoid valve is opened, and records the runing time of the solenoid valve；
Judge whether the runing time of the solenoid valve is greater than the second default runing time；
When determining that the runing time of the solenoid valve is greater than the second default runing time, the solenoid valve is closed.
10. according to the described in any item air conditioners of claim 7-9, which is characterized in that the running frequency according to compressor
Extremely setting step number with the aperture of system pressure adjustment electric expansion valve includes:
Opening for the electric expansion valve is adjusted according to the running frequency of the compressor and the pressure of the compressor air-discharging pipeline
Degree extremely setting step number.
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| CN201811089385.8A CN109282447B (en) | 2018-09-18 | 2018-09-18 | Control method for preventing pipeline vibration and air conditioner |
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| CN201811089385.8A CN109282447B (en) | 2018-09-18 | 2018-09-18 | Control method for preventing pipeline vibration and air conditioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397171A (en) * | 2020-04-14 | 2020-07-10 | 宁波奥克斯电气股份有限公司 | Compressor frequency control method and device and air conditioner |
| CN115127222A (en) * | 2022-08-09 | 2022-09-30 | 宁波奥克斯电气股份有限公司 | Vibration control method and device of variable frequency air conditioner, air conditioner and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101000178A (en) * | 2007-01-11 | 2007-07-18 | 清华大学 | Refrigeration system |
| CN102345916A (en) * | 2011-08-29 | 2012-02-08 | 深圳市锐钜科技有限公司 | Method and system for eliminating frequency resonance for frequency conversion air conditioner |
| KR20140036358A (en) * | 2012-09-10 | 2014-03-26 | 삼성전자주식회사 | Air conditioner and thereof control process |
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2018
- 2018-09-18 CN CN201811089385.8A patent/CN109282447B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000178A (en) * | 2007-01-11 | 2007-07-18 | 清华大学 | Refrigeration system |
| CN102345916A (en) * | 2011-08-29 | 2012-02-08 | 深圳市锐钜科技有限公司 | Method and system for eliminating frequency resonance for frequency conversion air conditioner |
| KR20140036358A (en) * | 2012-09-10 | 2014-03-26 | 삼성전자주식회사 | Air conditioner and thereof control process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397171A (en) * | 2020-04-14 | 2020-07-10 | 宁波奥克斯电气股份有限公司 | Compressor frequency control method and device and air conditioner |
| CN115127222A (en) * | 2022-08-09 | 2022-09-30 | 宁波奥克斯电气股份有限公司 | Vibration control method and device of variable frequency air conditioner, air conditioner and storage medium |
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| CN109282447B (en) | 2020-10-27 |
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