CN109612021A - A kind of multi-gang air conditioner abnormal sound control method and multi-gang air conditioner - Google Patents
A kind of multi-gang air conditioner abnormal sound control method and multi-gang air conditioner Download PDFInfo
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- CN109612021A CN109612021A CN201811433308.XA CN201811433308A CN109612021A CN 109612021 A CN109612021 A CN 109612021A CN 201811433308 A CN201811433308 A CN 201811433308A CN 109612021 A CN109612021 A CN 109612021A
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
-
- 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
-
- 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
- F24F11/65—Electronic processing for selecting an operating mode
-
- 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
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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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
- F25B2500/12—Sound
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21155—Temperatures of a compressor or the drive means therefor of the oil
Abstract
The present invention provides a kind of multi-gang air conditioner abnormal sound control method and multi-gang air conditioner, method includes machine execution refrigeration mode in first, machine executes standby mode in one or more second, execute oil return movement, it increases and keeps compressor frequency to preset frequency, the electric expansion valve of machine opens the first aperture and operation predetermined time in second, machine coil temperature and/or system low-voltage pressure in measurement second, the coil temperature is less than predetermined pressure less than the first predetermined temperature and/or system low-voltage pressure, adjust the first aperture to the second aperture of electric expansion valve and operation predetermined time, circulation executes adjusting electronic expansion valve opening and makes machine coil temperature in second be less than predetermined pressure more than or equal to the first predetermined temperature and/or system low-voltage pressure for N aperture, holding electronic expansion valve opening is N aperture.
Description
Technical field
The invention belongs to air conditioner technical fields, and in particular to a kind of multi-gang air conditioner abnormal sound control method and multi-joint sky
Adjusting system.
Background technique
With progress of the epoch, one drags the combined air conditioners of more air-conditionings to have become main product currently on the market.It is right
It drags more air conditioner oil returns of crucial importance in one, when singly opening one, encounters the standby interior machine expansion valve opening of oil return and allow its oil return.
Cause standby interior machine refrigerant to flow through in this way not dry since interior machine is not switched on, occur due to there is biggish temperature inside and outside air-conditioning
Difference will cause plastic part and issue slight " thunderclap " sound according to the principle expanded with heat and contract with cold, and inside air-conditioning with external temperature
Difference is also bigger, then plastic part deformation is just more obvious, therefore " thunderclap " sound is also relatively large.
Based on abnormal sound technical problem present in above-mentioned combined air conditioners, there has been no relevant solutions；Therefore compel to be essential
Seek effective scheme to solve the above problems.
Summary of the invention
In place of solving above-mentioned the deficiencies in the prior art, the present invention provide a kind of multi-gang air conditioner abnormal sound control method and
The technical issues of multi-gang air conditioner, which solve abnormal sounds existing for existing combined air conditioners.
The purpose of the present invention is be achieved by the following technical programs.
A kind of multi-gang air conditioner abnormal sound control method includes the following steps,
Machine executes refrigeration mode in first, and machine executes standby mode in one or more second,
Oil return movement is executed, increase and keeps compressor frequency to preset frequency, the electric expansion valve of machine is opened in second
First aperture and operation predetermined time,
Measurement second in machine coil temperature and/or system low-voltage pressure, the coil temperature less than the first predetermined temperature and/
Or system low-voltage pressure is less than predetermined pressure, adjusts the first aperture to the second aperture of electric expansion valve and operation predetermined time,
Machine coil temperature and/or system low-voltage pressure in measurement second again, the coil temperature is less than the first predetermined temperature
Degree and/or system low-voltage pressure are less than predetermined pressure, adjust the second aperture of electric expansion valve to third aperture and operation makes a reservation for
Time,
It is that N aperture makes machine coil temperature in second pre- more than or equal to first that circulation, which executes and adjusts electronic expansion valve opening,
Determine temperature and/or system low-voltage pressure is less than predetermined pressure, holding electronic expansion valve opening is N aperture.
In the multi-gang air conditioner abnormal sound control method, after electronic expansion valve opening keeps N aperture, measuring system
Delivery temperature and high pressure saturation temperature, when discharge superheat is less than the second predetermined temperature, electronic expansion valve opening is from N aperture tune
Section is N+1 aperture, so that discharge superheat is more than or equal to the second predetermined temperature, and machine coil temperature is more than or equal to the in second
One predetermined temperature and/or system low-voltage pressure are less than predetermined pressure, and wherein discharge superheat is delivery temperature and high pressure saturation temperature
The difference of degree.
In the multi-gang air conditioner abnormal sound control method, after electronic expansion valve opening keeps N+1 aperture, measurement system
It unites oil temperature and high pressure saturation temperature, when oil overheating degree is less than third predetermined temperature, electronic expansion valve opening is from N+1 aperture tune
Section is N+2 aperture, so that oil overheating degree is greater than third predetermined temperature, discharge superheat is more than or equal to the second predetermined temperature,
And machine coil temperature is more than or equal to the first predetermined temperature and/or system low-voltage pressure and is less than predetermined pressure in second, wherein oil temperature
The degree of superheat is the difference of the mild high pressure saturation temperature of system oil.
In the multi-gang air conditioner abnormal sound control method, oil return movement is executed, increases and keeps compressor frequency extremely
Preset frequency, measuring system oil temperature, system exhaust temperature and high pressure saturation temperature, the electric expansion valve of machine opens first in second
Aperture makes oil overheating degree be greater than third predetermined temperature, discharge superheat more than or equal to the second predetermined temperature, keeps first to open
Degree and operation predetermined time, wherein discharge superheat is the difference of delivery temperature and high pressure saturation temperature, and oil overheating degree is system
The difference of oil temperature and high pressure saturation temperature.
In the multi-gang air conditioner abnormal sound control method, it is located at the first temperature sensor detection system of system exhaust side
The high pressure saturation temperature of system is located at the second temperature sensor detection delivery temperature of exhaust outlet, is located at the third of compression motor spindle
Temperature sensor detection system oil temperature is located at the pressure sensor detection system low pressure of suction side.
In the multi-gang air conditioner abnormal sound control method, the first temperature sensor, second temperature sensor and/or
Three-temperature sensor includes thermocouple.
In the multi-gang air conditioner abnormal sound control method, adjusting electronic expansion valve opening is between increasing or wait at equal intervals
Every reduction.
In the multi-gang air conditioner abnormal sound control method, the first aperture be 160pl, predetermined time 10-40s, in advance
Constant-pressure is 0.65Mpa-0.7Mpa.
In the multi-gang air conditioner abnormal sound control method, first temperature is 1 DEG C, and the second temperature is 10
DEG C, the third temperature is 5 DEG C.
In the multi-gang air conditioner abnormal sound control method, N aperture makes machine coil temperature in second be in 1 DEG C -3
DEG C and/or system low-voltage pressure be more than or equal to 0.65Mpa.
Another aspect of the present invention, a kind of multi-gang air conditioner include,
Outdoor unit comprising the oil return sensor of compressor and detection oil return signal,
Multiple indoor units comprising electric expansion valve,
First temperature sensor of the first temperature sensor, the high pressure saturation temperature of detection system is located at system exhaust side,
Second temperature sensor, the second temperature sensor for detecting delivery temperature are located at exhaust outlet,
The third temperature sensor of third temperature sensor, detection system oil temperature is located at compression motor spindle,
The pressure sensor of pressure sensor, detection system low pressure is located at suction side,
Control unit, one end connect the oil return sensor, the first temperature sensor, second temperature sensor, third
Temperature sensor and pressure sensor, the other end connect the electric expansion valve and compressor,
In response to oil return signal, control unit sends frequency signal to the compressor, so that compressor frequency increases simultaneously
It keeps to preset frequency,
In response to the first temperature sensor, second temperature sensor, the temperature of third temperature sensor and pressure sensor
Signal and pressure signal, control unit send opening amount signal to the electric expansion valve, so that oil overheating degree is pre- greater than third
Determining temperature, discharge superheat, machine coil temperature is more than or equal to the first predetermined temperature more than or equal to the second predetermined temperature, and in second
And/or system low-voltage pressure is less than predetermined pressure, wherein discharge superheat is the difference of delivery temperature and high pressure saturation temperature, oil
The warm degree of superheat is the difference of the mild high pressure saturation temperature of system oil.
In the multi-gang air conditioner, the first temperature sensor, second temperature sensor and/or third temperature sensor
Including thermocouple.
In the multi-gang air conditioner, control unit includes proportional controller, increases at equal intervals or reduces at equal intervals
Adjust electronic expansion valve opening.
The present invention be used for solve combined air conditioners first in machine it is in refrigeration mode, one or more second in machine be in
Abnormal sound under machine mode executes oil return movement in combined air conditioners, and the present invention increases and keeps compressor frequency to preset frequency, the
The electric expansion valve of machine opens the first aperture and operation predetermined time in two, this is conducive to smooth oil return, machine disk in measurement second
Tube temperature degree and/or system low-voltage pressure can accurately reflect the temperature difference of machine in second, be adjusted by circulation, and electric expansion valve is opened
Degree is that N aperture makes machine coil temperature in second be more than or equal to the first predetermined temperature and/or system low-voltage pressure less than predetermined
Pressure, holding electronic expansion valve opening are N aperture, solve multi-variable air conditioning unit in the process of running, one drags more air-conditioning lists
An interior opportunity is opened to when oil return, by the standby interior machine electronic expansion valve opening of adjust automatically, guarantees standby interior machine evaporator
Surface temperature is in 0 DEG C or more frost-free, to avoid interior machine plastic member because of noise caused by excessively expanding with heat and contract with cold.The present invention is into one
Step ground measuring system delivery temperature and high pressure saturation temperature, when discharge superheat is less than the second predetermined temperature, electric expansion valve is opened
Spending from N aperture regulation is N+1 aperture, so that discharge superheat is more than or equal to the second predetermined temperature, and machine coil pipe in second
Temperature is more than or equal to the first predetermined temperature and/or system low-voltage pressure is less than predetermined pressure, and wherein discharge superheat is exhaust temperature
The difference of degree and high pressure saturation temperature, avoids and causes back liquid risk, and further, electronic expansion valve opening keeps N+1 to open
After degree, measuring system oil temperature and high pressure saturation temperature, when oil overheating degree be less than third predetermined temperature, electronic expansion valve opening from
N+1 aperture regulation is N+2 aperture, so that oil overheating degree is greater than third predetermined temperature, discharge superheat is more than or equal to the
Two predetermined temperatures, and machine coil temperature is more than or equal to the first predetermined temperature in second and/or system low-voltage pressure is less than pre- level pressure
Power, wherein oil overheating degree is the difference of the mild high pressure saturation temperature of system oil, and the present invention adjusts the aperture of electric expansion valve in real time
It is whole to arrive optimized scope, so that multi-gang air conditioner both avoids back liquid risk and machine is not in due to heat expansion in standby second
Abnormal sound caused by shrinkage significantly improves the reliability of air-conditioning.
The above description is only an overview of the technical scheme of the present invention, in order to make technological means of the invention clearer
Understand, reach the degree that those skilled in the art can be implemented in accordance with the contents of the specification, and in order to allow the present invention
Above and other objects, features and advantages can be more clearly understood, illustrated below with a specific embodiment of the invention
Explanation.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Below with reference to attached drawing, the invention will be further described:
Fig. 1 is the step schematic diagram according to the multi-gang air conditioner abnormal sound control method of one embodiment of the invention；
Fig. 2 is the flow diagram according to the multi-gang air conditioner abnormal sound control method of one embodiment of the invention；
Fig. 3 is the structural schematic diagram according to the multi-gang air conditioner of one embodiment of the invention.
In figure: 1, outdoor unit；2, compressor；3, indoor unit；4, electric expansion valve；5, the first temperature sensor；6, second
Temperature sensor；7, third temperature sensor；8, pressure sensor；9, control unit.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to better understand, Fig. 1 is multi-gang air conditioner abnormal sound control method according to an embodiment of the invention
Step schematic diagram, as shown in Figure 1, a kind of multi-gang air conditioner abnormal sound control method includes the following steps,
S1, machine executes refrigeration mode in first, and machine executes standby mode in one or more second,
S2 executes oil return movement, increases and keeps compressor frequency to preset frequency, the electric expansion valve of machine is opened in second
The first aperture and operation predetermined time are opened,
S3 measures machine coil temperature and/or system low-voltage pressure in second, and the coil temperature is less than the first predetermined temperature
And/or system low-voltage pressure is less than predetermined pressure, adjusts the first aperture to the second aperture of electric expansion valve and the pre- timing of operation
Between,
S4, measures machine coil temperature and/or system low-voltage pressure in second again, and the coil temperature is predetermined less than first
Temperature and/or system low-voltage pressure are less than predetermined pressure, adjust the second aperture of electric expansion valve to third aperture and run pre-
It fixes time,
S5, it is that N aperture makes in second machine coil temperature be more than or equal to that circulation, which executes and adjusts electronic expansion valve opening,
One predetermined temperature and/or system low-voltage pressure are less than predetermined pressure, and holding electronic expansion valve opening is N aperture.
In the preferred embodiment of the multi-gang air conditioner abnormal sound control method, electronic expansion valve opening keeps N
After aperture, measuring system delivery temperature and high pressure saturation temperature, when discharge superheat is less than the second predetermined temperature, electric expansion valve
Aperture from N aperture regulation be N+1 aperture so that discharge superheat is more than or equal to the second predetermined temperature, and machine disk in second
Tube temperature degree is more than or equal to the first predetermined temperature and/or system low-voltage pressure is less than predetermined pressure, and wherein discharge superheat is exhaust
The difference of temperature and high pressure saturation temperature.
In the preferred embodiment of the multi-gang air conditioner abnormal sound control method, electronic expansion valve opening keeps N+
After 1 aperture, measuring system oil temperature and high pressure saturation temperature, when oil overheating degree is less than third predetermined temperature, electric expansion valve is opened
Spending from N+1 aperture regulation is N+2 aperture, so that oil overheating degree is greater than third predetermined temperature, discharge superheat is greater than etc.
In the second predetermined temperature, and machine coil temperature is more than or equal to the first predetermined temperature in second and/or system low-voltage pressure is less than in advance
Constant-pressure, wherein oil overheating degree is the difference of the mild high pressure saturation temperature of system oil.
In the preferred embodiment of the multi-gang air conditioner abnormal sound control method, oil return movement is executed, increases and protects
Compressor frequency is held to preset frequency, measuring system oil temperature, system exhaust temperature and high pressure saturation temperature, the electronics of machine in second
Expansion valve opens the first aperture and oil overheating degree is made to be greater than third predetermined temperature, discharge superheat more than or equal to the second predetermined temperature
Degree is kept for the first aperture and operation predetermined time, wherein discharge superheat is the difference of delivery temperature and high pressure saturation temperature, oil
The warm degree of superheat is the difference of the mild high pressure saturation temperature of system oil.
For a further understanding of the present invention, in one embodiment, Fig. 2 is the multi-joint sky according to one embodiment of the invention
The flow diagram of adjusting system abnormal sound control method, as shown in Fig. 2, a kind of controlling party for solving air-conditioning internal machine plastic part abnormal sound
Method, the specific steps of which are as follows:
The design of system exhaust side has high pressure saturation temperature of the high-pressure pressure sensor for detection system, and exhaust ports design has
Thermocouple has thermocouple for detecting compressor oil temperature, suction side for detecting delivery temperature, compression motor spindle design
Design has low-pressure sensor for detecting low pressure saturation temperature.
Refrigeration mode list opens an interior opportunity to when oil return movement, and the interior machine of booting operates normally, outer machine compressor frequency
Rate is increased to a certain Frequency point and keeps, and standby interior machine open degree is 160pls, and operation 30S determines interior machine coil temperature automatically；
If interior machine tube temperature≤1 DEG C of oil return process, or when outer machine system low-voltage pressure≤0.7Mpa, would send air-conditioning to
Host electric-controlled plate is to adjust electronic expansion valve opening；
The standby every 30S of interior machine electric expansion valve adjusts primary increase 5Pls, and operation 30S determines that circulation executes again；
When machine evaporator surface will not be tied interior machine tube temperature within 1 DEG C≤A≤3 DEG C or system low-voltage >=0.65Mpa illustrate
Frost then keeps current expansion valve opening；Interior machine plastic member is notheated swollen shrinkage and influences deformation and generate noise at this time.
In one embodiment, oil return process records delivery temperature and high pressure saturation temperature simultaneously, calculates discharge superheat
Degree make its must not≤10 DEG C, to guarantee reliability.
In one embodiment, oil return process records oil temperature and high pressure saturation temperature simultaneously, to calculate oil temperature mistake
Temperature make its must not≤5 DEG C, to guarantee reliability.
In one embodiment, a kind of multi-gang air conditioner abnormal sound control method includes the following steps,
The first, an outer machine drags two interior machines, wherein 1 interior machine operation, an interior machine is standby, unit after operation 4 hours
Start oil return program, booting and standby electronic expansion valve opening reach 160 steps, start to detect delivery temperature and high pressure after 30S
Saturation temperature, by calculating discharge superheat.
Meet discharge superheat >=10 DEG C, then automatically controlled sending adjusts electric expansion valve order, when interior machine tube temperature is in 1 DEG C≤A
≤ 3 DEG C or system low-voltage >=0.65Mpa stop adjusting.
The second, oil temperature temperature and high pressure saturation temperature are detected simultaneously, meets oil overheating degree by calculating oil overheating degree
>=10 DEG C, detect low pressure saturation temperature and interior machine coil temperature.
If interior machine coil temperature is less than or equal to 0 DEG C, automatically controlled sending adjusts electric expansion valve order, when interior machine tube temperature exists
1 DEG C≤A≤3 DEG C or system low-voltage >=0.65Mpa stop adjusting.
In one embodiment, guaranteeing compressor reliability, discharge superheat is necessary >=10 DEG C, and oil overheating degree is necessary >=
5 DEG C, so oil return process electronic expansion valve opening, size will rationally, the excessive discharge superheat of aperture, and oil overheating degree is discontented
Foot, be easy to cause back liquid.Table 1 is the tables of data of the multi-gang air conditioner abnormal sound control method of one embodiment of the invention, referring to
Table 1
Table 1
As it can be seen from table 1 multi-gang air conditioner abnormal sound control method of the invention can be significantly by abnormal sound number from now
3 times had drop to 0 time, and further avoid back liquid risk, significantly improve the reliability of air-conditioning, in addition, the present invention is also
It can be to avoid machine frosting in standby second.
In the preferred embodiment of the multi-gang air conditioner abnormal sound control method, it is located at the first temperature of system exhaust side
The high pressure saturation temperature for spending sensor detecting system is located at the second temperature sensor detection delivery temperature of exhaust outlet, is located at pressure
The third temperature sensor detection system oil temperature of contracting motor spindle, is located at the pressure sensor detection system low pressure of suction side
Pressure.
In the preferred embodiment of the multi-gang air conditioner abnormal sound control method, the first temperature sensor, the second temperature
It spends sensor and/or third temperature sensor includes thermocouple.
In the preferred embodiment of the multi-gang air conditioner abnormal sound control method, adjusting electronic expansion valve opening is etc.
Interval increases or reduces at equal intervals.
In the preferred embodiment of the multi-gang air conditioner abnormal sound control method, the first aperture is 160pl, pre- timing
Between be 10-40s, predetermined pressure 0.65Mpa-0.7Mpa.
In the preferred embodiment of the multi-gang air conditioner abnormal sound control method, first temperature is 1 DEG C, described
Second temperature is 10 DEG C, and the third temperature is 5 DEG C.
In the preferred embodiment of the multi-gang air conditioner abnormal sound control method, N aperture makes machine disk in second
Tube temperature degree is in 1 DEG C -3 DEG C and/or system low-voltage pressure is more than or equal to 0.65Mpa.
Fig. 3 is according to the structural schematic diagram of the multi-gang air conditioner of one embodiment of the invention, as shown, a kind of multi-joint
Air-conditioning system includes outdoor unit 1 comprising the oil return sensor of compressor 2 and detection oil return signal, multiple indoor units 3, packet
Electric expansion valve 4 is included,
First temperature sensor 5 of the first temperature sensor 5, the high pressure saturation temperature of detection system is located at system exhaust
Side,
Second temperature sensor 6, the second temperature sensor 6 for detecting delivery temperature are located at exhaust outlet,
The third temperature sensor 7 of third temperature sensor 7, detection system oil temperature is located at compression motor spindle,
Pressure sensor 8, the pressure sensor 8 of detection system low pressure are located at 2 suction side of compressor,
Control unit 9, one end connect the oil return sensor, the first temperature sensor 5, second temperature sensor 6, the
Three-temperature sensor 7 and pressure sensor 8, the other end connect the electric expansion valve 4 and compressor 2,
In response to oil return signal, control unit 9 sends frequency signal to the compressor 2, so that 2 frequency of compressor increases
And keep to preset frequency,
In response to the first temperature sensor 5, second temperature sensor 6, third temperature sensor 7 and pressure sensor 8
Temperature signal and pressure signal, control unit 9 send opening amount signal to the electric expansion valve 4, so that oil overheating degree is greater than
Third predetermined temperature, discharge superheat are more than or equal to the second predetermined temperature, and machine coil temperature is more than or equal to first in advance in second
Determine temperature and/or system low-voltage pressure and be less than predetermined pressure, wherein discharge superheat be delivery temperature and high pressure saturation temperature it
Difference, oil overheating degree are the difference of the mild high pressure saturation temperature of system oil.
In the preferred embodiment of the multi-gang air conditioner, the first temperature sensor 5, second temperature sensor 6 and/or
Third temperature sensor 7 includes thermocouple.
In the preferred embodiment of the multi-gang air conditioner, control unit 9 includes proportional controller, is increased at equal intervals
Or it reduces adjust electronic expansion valve opening at equal intervals.
The above, only presently preferred embodiments of the present invention not do limitation in any form to the present invention.It is any ripe
Those skilled in the art is known, without departing from the scope of the technical proposal of the invention, all using technology contents described above
Many possible changes and modifications or equivalent example modified to equivalent change are made to technical solution of the present invention.Therefore, all
It is the content without departing from technical solution of the present invention, any change modification made to the above embodiment of technology according to the present invention,
Equivalent variations and modification belong to the protection scope of the technical program.
Claims (13)
1. a kind of multi-gang air conditioner abnormal sound control method comprising following steps,
Machine executes refrigeration mode in first, and machine executes standby mode in one or more second,
Oil return movement is executed, increase and keeps compressor frequency to preset frequency, the electric expansion valve of machine opens first in second
Aperture and operation predetermined time,
Machine coil temperature and/or system low-voltage pressure in measurement second, the coil temperature is less than the first predetermined temperature and/or is
Low pressure of uniting is less than predetermined pressure, adjusts the first aperture to the second aperture of electric expansion valve and operation predetermined time,
Again measurement second in machine coil temperature and/or system low-voltage pressure, the coil temperature less than the first predetermined temperature and/
Or system low-voltage pressure is less than predetermined pressure, adjusts the second aperture of electric expansion valve to third aperture and runs the predetermined time,
It is that N aperture makes machine coil temperature in second be more than or equal to the first predetermined temperature that circulation, which executes and adjusts electronic expansion valve opening,
Degree and/or system low-voltage pressure are less than predetermined pressure, and holding electronic expansion valve opening is N aperture.
2. a kind of multi-gang air conditioner abnormal sound control method as described in claim 1, wherein electronic expansion valve opening keeps the
After N aperture, measuring system delivery temperature and high pressure saturation temperature, when discharge superheat is less than the second predetermined temperature, electronic expansion
Valve opening from N aperture regulation be N+1 aperture so that discharge superheat is more than or equal to the second predetermined temperature, and machine in second
Coil temperature is more than or equal to the first predetermined temperature and/or system low-voltage pressure is less than predetermined pressure, and wherein discharge superheat is row
The difference of temperature degree and high pressure saturation temperature.
3. a kind of multi-gang air conditioner abnormal sound control method as claimed in claim 2, wherein electronic expansion valve opening keeps the
After N+1 aperture, measuring system oil temperature and high pressure saturation temperature, when oil overheating degree is less than third predetermined temperature, electric expansion valve
Aperture from N+1 aperture regulation be N+2 aperture so that oil overheating degree is greater than third predetermined temperature, discharge superheat and is greater than
Equal to the second predetermined temperature, and machine coil temperature is more than or equal to the first predetermined temperature in second and/or system low-voltage pressure is less than
Predetermined pressure, wherein oil overheating degree is the difference of the mild high pressure saturation temperature of system oil.
4. a kind of multi-gang air conditioner abnormal sound control method as described in claim 1, wherein execute oil return movement, increase simultaneously
Keep compressor frequency to preset frequency, measuring system oil temperature, system exhaust temperature and high pressure saturation temperature, the electricity of machine in second
Sub- expansion valve opens the first aperture and makes oil overheating degree predetermined more than or equal to second greater than third predetermined temperature, discharge superheat
Temperature is kept for the first aperture and operation predetermined time, wherein and discharge superheat is the difference of delivery temperature and high pressure saturation temperature,
Oil overheating degree is the difference of the mild high pressure saturation temperature of system oil.
5. a kind of multi-gang air conditioner abnormal sound control method as claimed in claim 4, wherein be located at the first of system exhaust side
The high pressure saturation temperature of temperature sensor detection system is located at the second temperature sensor detection delivery temperature of exhaust outlet, is located at
The third temperature sensor detection system oil temperature of motor spindle is compressed, the pressure sensor detection system for being located at suction side is low
Pressure pressure.
6. a kind of multi-gang air conditioner abnormal sound control method as claimed in claim 5, wherein the first temperature sensor, second
Temperature sensor and/or third temperature sensor include thermocouple.
7. a kind of multi-gang air conditioner abnormal sound control method as described in claim 1, wherein adjusting electronic expansion valve opening is
Increase at equal intervals or reduces at equal intervals.
8. a kind of multi-gang air conditioner abnormal sound control method as described in claim 1, wherein the first aperture is 160pl, is made a reservation for
Time is 10-40s, predetermined pressure 0.65Mpa-0.7Mpa.
9. a kind of multi-gang air conditioner abnormal sound control method as claimed in claim 3, wherein first temperature is 1 DEG C, institute
Stating second temperature is 10 DEG C, and the third temperature is 5 DEG C.
10. a kind of multi-gang air conditioner abnormal sound control method as claimed in claim 3, wherein N aperture makes machine in second
Coil temperature is in 1 DEG C -3 DEG C and/or system low-voltage pressure is more than or equal to 0.65Mpa.
11. a kind of multi-gang air conditioner comprising,
Outdoor unit comprising the oil return sensor of compressor and detection oil return signal,
Multiple indoor units comprising electric expansion valve,
First temperature sensor of the first temperature sensor, the high pressure saturation temperature of detection system is located at system exhaust side,
Second temperature sensor, the second temperature sensor for detecting delivery temperature are located at exhaust outlet,
The third temperature sensor of third temperature sensor, detection system oil temperature is located at compression motor spindle,
The pressure sensor of pressure sensor, detection system low pressure is located at suction side,
Control unit, one end connect the oil return sensor, the first temperature sensor, second temperature sensor, third temperature
Sensor and pressure sensor, the other end connect the electric expansion valve and compressor,
In response to oil return signal, control unit sends frequency signal to the compressor, so that compressor frequency is increased and kept
To preset frequency,
In response to the first temperature sensor, the temperature signal of second temperature sensor, third temperature sensor and pressure sensor
And pressure signal, control unit send opening amount signal to the electric expansion valve, so that oil overheating degree is greater than the predetermined temperature of third
Degree, discharge superheat be more than or equal to the second predetermined temperature, and in second machine coil temperature be more than or equal to the first predetermined temperature and/or
System low-voltage pressure is less than predetermined pressure, wherein discharge superheat is the difference of delivery temperature and high pressure saturation temperature, oil overheating
Degree is the difference of the mild high pressure saturation temperature of system oil.
12. a kind of multi-gang air conditioner as claimed in claim 11, wherein the first temperature sensor, second temperature sensor
And/or third temperature sensor includes thermocouple.
13. a kind of multi-gang air conditioner as claimed in claim 11, wherein control unit includes proportional controller, Deng between
Electronic expansion valve opening is adjusted every increasing or reducing at equal intervals.
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| CN113790506A (en) * | 2021-09-16 | 2021-12-14 | 珠海格力电器股份有限公司 | Method for solving noise of air conditioner outdoor unit |
| CN114739081A (en) * | 2022-03-29 | 2022-07-12 | 青岛海尔空调电子有限公司 | Air conditioning unit control method and system and air conditioning unit |
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