CN108168169A - The noise control method of multi-connected air conditioning system - Google Patents
The noise control method of multi-connected air conditioning system Download PDFInfo
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- CN108168169A CN108168169A CN201711252172.8A CN201711252172A CN108168169A CN 108168169 A CN108168169 A CN 108168169A CN 201711252172 A CN201711252172 A CN 201711252172A CN 108168169 A CN108168169 A CN 108168169A
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- indoor unit
- expansion valve
- conditioning system
- air conditioning
- connected air
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 63
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 abstract description 9
- 239000003507 refrigerant Substances 0.000 description 24
- 238000010586 diagram Methods 0.000 description 6
- 238000010992 reflux Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
- F25B41/345—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by solenoids
- F25B41/347—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by solenoids with the valve member being opened and closed cyclically, e.g. with pulse width modulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0232—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with bypasses
- F25B2313/02323—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with bypasses during heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The present invention relates to air-conditioning technical fields, and in particular to a kind of noise control method of multi-connected air conditioning system.Present invention seek to address that existing solve the problems, such as that effect existing for the technical solution of the heating standby noise of indoor unit is poor, of high cost using heavy caliber electric expansion valve is replaced.The noise control method of the present invention includes：When the operational mode of multi-connected air conditioning system is heating mode, the quantity of the indoor unit in standby mode is obtained；When quantity is more than amount threshold, the expansion valve interval corresponding to all indoor units in standby mode is controlled to open.Pass through the control mode for opening the expansion valve interval corresponding to all indoor units in standby mode, the present invention can completely eliminate interval and open the noise that the indoor unit corresponding to the expansion valve being closed in the process generates, reduce the noise that the indoor unit corresponding to the expansion valve in opening generates, noise control effect is improved, reduces cost.
Description
Technical field
The present invention relates to air-conditioning technical fields, and in particular to a kind of noise control method of multi-connected air conditioning system.
Background technology
In recent years, multi-connected air conditioning system is shown with its install convenient, refrigerating/heating effect small on facade influence
The advantages that work, is increasingly becoming the preferred solution that the collectives such as office building, market, apartment place carries out air conditioning.Multi-connected machine
Air-conditioning system, in order to avoid saving bit by bit for refrigerant, is generally in the electronics of the indoor unit of standby mode when being run with heating mode
Expansion valve can retain certain aperture (i.e. benchmark retains aperture) so that refrigerant participates in the cycle of system.But it is flowed in refrigerant
When, since the fan of heating indoor unit is inoperative, the flowing sound of refrigerant can be amplified, and then form noise, especially
In the room that bedroom etc. needs peace and quiet, user's rest is influenced, brings very bad usage experience.
In order to solve above-mentioned heating indoor unit it is standby when noise problem, the prior art mainly adopts the electronics of larger caliber
The scheme that expansion valve substitutes more small-bore expansion valve in former air conditioner indoor unit is solved.This scheme is by increasing expansion valve
Bore, the mode for changing expansion valve runner so that the flow velocity of refrigerant reduces, and then the noise that the flowing for reducing refrigerant generates.Though
Right this mode solves the noise problem that refrigerant flowing generates to a certain extent, but is also inevitably present certain lack
It falls into.First, the flowing sound of refrigerant can only be reduced by way of increasing electric expansion valve bore, changing runner, it can not be from
Fundamentally eliminate the flowing sound so that noise still exists.Secondly, increased to a certain extent using heavy caliber electric expansion valve
The cost of complete machine, for multi-connected air conditioning system, while replaces the electric expansion valve of more indoor units, multi-connected air conditioner
The cost of system can greatly increase.That is, existing treated using replacement heavy caliber electric expansion valve solution heating indoor unit
The technical solution of machine noise there are effect it is poor, of high cost the problem of.
Correspondingly, this field needs a kind of noise control method of new multi-connected air conditioning system to solve the above problems.
Invention content
It is existing using replacement heavy caliber electric expansion valve in order to solve in order to solve the above problem of the prior art
Come solve the problems, such as heating the standby noise of indoor unit technical solution existing for effect it is poor, of high cost, the present invention provides one kind
The noise control method of multi-connected air conditioning system, the multi-connected air conditioning system include outdoor unit and multiple indoor units, Mei Gesuo
It states indoor unit and is both provided with expansion valve, which is characterized in that the noise control method includes the following steps：
When the operational mode of the multi-connected air conditioning system is heating mode, the indoor unit in standby mode is obtained
Quantity；
When the quantity is more than amount threshold, between the expansion valve corresponding to all indoor units in standby mode of control
It separates and opens.
In the optimal technical scheme of the noise control method of above-mentioned multi-connected air conditioning system, " it is more than number in the quantity
When measuring threshold value, control the unlatching of the expansion valve interval corresponding to all indoor units in standby mode " the step of further comprise：
All indoor units for being in standby mode are grouped；
In a manner of making the expansion valve corresponding to the indoor unit in a grouping every time while open, all grouping wheels are controlled
Stream is opened.
In the optimal technical scheme of the noise control method of above-mentioned multi-connected air conditioning system, " make the room in a grouping
Expansion valve corresponding to interior machine is opened simultaneously " the step of further comprise：
The expansion valve corresponding to indoor unit in control packet is opened simultaneously in the first setting time with the first Valve opening velocity
It opens；
The expansion valve corresponding to the indoor unit in the grouping is detected with the opening time of the first Valve opening velocity, is opened when described
When opening the time more than the first setting time, the expansion valve corresponding to the indoor unit in the grouping is controlled to close.
In the optimal technical scheme of the noise control method of above-mentioned multi-connected air conditioning system, in " the room in control packet
Expansion valve corresponding to interior machine is opened simultaneously in the first setting time with the first Valve opening velocity " the step of after, the noise
Control method further includes：
When the aperture of the expansion valve reaches the maximum setting aperture of the expansion valve, the expansion valve is made to stop opening.
In the optimal technical scheme of the noise control method of above-mentioned multi-connected air conditioning system, the maximum of the expansion valve is set
The number for determining aperture based on the indoor unit corresponding to the expansion valve determines.
In the optimal technical scheme of the noise control method of above-mentioned multi-connected air conditioning system, " all groupings of control are in turn
The step of unlatching ", further comprises：
Judge the shut-in time of the expansion valve corresponding to the indoor unit in a upper grouping, be more than second when the shut-in time
During setting time, the expansion valve corresponding to the indoor unit of next grouping is controlled to open.
In the optimal technical scheme of the noise control method of above-mentioned multi-connected air conditioning system, " all groupings is made to open in turn
Open " the step of further include：
After the expansion valve corresponding to indoor unit in all groupings is opened once, make the indoor unit institute in all groupings
Corresponding expansion valve is closed in third setting time.
In the optimal technical scheme of the noise control method of above-mentioned multi-connected air conditioning system, the third setting time base
It is determined in the quantity and the total quantity of the indoor unit of the multi-connected air conditioning system of the indoor unit in standby mode.
In the optimal technical scheme of the noise control method of above-mentioned multi-connected air conditioning system, " to being in standby mode
All indoor units are grouped " the step of further comprise：
Obtain the total quantity of the indoor unit of the multi-connected air conditioning system；
Correspondence based on the total quantity with maximum setting quantity, determines the maximum setting of indoor unit in each grouping
Quantity；
Based on the maximum setting quantity, the indoor unit in standby mode is grouped.
In the optimal technical scheme of the noise control method of above-mentioned multi-connected air conditioning system, " based on the maximum setting
The step of quantity, by the indoor unit grouping in standby mode ", further comprises：
In quantity of the maximum setting quantity no more than the indoor unit in standby mode, for each grouping point
Indoor unit with the maximum setting quantity；
When the maximum setting quantity is more than the quantity of the indoor unit in standby mode, distributed for each grouping
One indoor unit.
It will be appreciated to those of skill in the art that in the preferred technical solution of the present invention, multi-connected air conditioning system
Noise control method includes the following steps：When the operational mode of multi-connected air conditioning system is heating mode, obtain in standby
The quantity of the indoor unit of state；When quantity is more than amount threshold, control corresponding to all indoor units in standby mode
It opens at expansion valve interval.When being more than amount threshold by the quantity in the indoor unit in standby mode, make all in standby
The control mode that expansion valve interval corresponding to the indoor unit of state is opened, the present invention can be completely eliminated during the unlatching of interval
The noise that indoor unit corresponding to the expansion valve being closed generates, reduces corresponding to the expansion valve in opening
The noise that indoor unit generates.Further, since the method for the present invention need not make the original structure of air-conditioning system during control
Change, therefore the present invention also as save complete machine cost.That is, above-mentioned noise control method is solved and is used in the prior art
Replacing heavy caliber electric expansion valve, effect existing for the technical solution of the heating standby noise of indoor unit is poor, of high cost asks to solve
Topic, improves user experience.
Specifically, by being grouped to all indoor units in standby mode；And to make a grouping every time
In indoor unit corresponding to expansion valve simultaneously open mode, control it is all grouping open in turn, control method of the invention
It can completely eliminate the indoor unit corresponding to the expansion valve being closed during all groupings are opened in turn and generate
Noise, the room where the indoor unit is made to keep quite in expansion valve closing state.And the expansion valve institute in opening
Corresponding indoor unit when expanding valve closing state due to having saved bit by bit some refrigerants, sufficient when opening expansion valve
Refrigerant can reduce the noise that refrigerant flowing generates in the indoor unit in reflux, improve user experience.
Description of the drawings
With reference to the accompanying drawings come describe the present invention multi-connected air conditioning system noise control method.In attached drawing：
Fig. 1 is the flow diagram of the noise control method of the multi-connected air conditioning system of the present invention；
Fig. 2 is that the method flow that a kind of expansion valve interval made corresponding to the indoor unit of standby mode of the present invention is opened shows
It is intended to；
Fig. 3 is a kind of method flow schematic diagram being grouped to the indoor unit for being in standby mode of the present invention；
Fig. 4 is the method flow signal of the expansion valve corresponding to the indoor unit in a kind of one grouping of unlatching of the present invention
Figure.
Specific embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining the technical principle of the present invention, it is not intended that limit the scope of the invention.
Firstly the need of explanation, for those of ordinary skills, multi-connected air conditioning system includes outdoor unit
And multiple indoor units with outdoor unit serial or parallel connection, outdoor unit heat exchanger, compressor, outdoor electromechanical is provided in outdoor unit
Sub- expansion valve and outdoor unit control the components such as chip, and indoor set heat exchanger, electronic expansion valve of indoor unit are provided in indoor unit
And the indoor unit control components such as chip, connection relation, the refrigeration of air-conditioning system and heating principle between above-mentioned component etc. are all
It is known, herein without detailed description.
To solve to solve the skill of the heating standby noise of indoor unit using heavy caliber electric expansion valve is replaced in the prior art
The problem of effect existing for art scheme is poor, of high cost, the present invention provides a kind of noise control method of multi-connected air conditioning system,
The noise control method can the quantity based on the indoor unit in standby mode, by making the indoor unit institute in standby mode
The control mode that corresponding electric expansion valve (hereinafter referred to as expansion valve) is opened in turn, completely eliminates the expansion being closed
The noise that indoor unit corresponding to valve generates reduces the noise that indoor unit corresponding to the expansion valve in opening generates, makes
Each room keeps noiseless state in the most of the time, greatly improves user experience.
With reference first to Fig. 1, Fig. 1 is the flow diagram of the noise control method of the multi-connected air conditioning system of the present invention.
As shown in Figure 1, the noise control method of the multi-connected air conditioning system of the present invention mainly includes the following steps：
S100, multi-connected air conditioning system operational mode be heating mode when, obtain in standby mode indoor unit
Quantity；Operational mode such as multi-connected air conditioning system includes refrigeration mode, heating mode, air supply pattern and dehumidification mode,
Multi-connected air conditioning system obtains the operational mode of current system, and pass through and chip is controlled to obtain often by the control chip of outdoor unit
The state of a indoor unit obtains the quantity of the indoor unit in standby mode.
S200, when above-mentioned quantity is more than amount threshold, control swollen corresponding to all indoor units in standby mode
It opens at swollen valve interval.If amount threshold is 2, when quantity is 3, the expansion valve corresponding to 3 indoor units is made to take turns one by one
Stream is opened.Certainly, the setting that amount threshold and interval are opened is not unalterable, and those skilled in the art also are able to adjust it
It is whole.Such as time threshold can also be 3,4,5；Open swollen corresponding to the indoor unit that can also be and make to be in standby mode in interval
Swollen valve opened in turn in a manner of opening two every time or by one-two rotation open etc..
Foregoing description can be seen that in a heating mode, by making the expansion corresponding to the indoor unit in standby mode
Valve interval is opened, and noise control method of the invention can completely eliminate the indoor unit corresponding to the expansion valve being closed
The noise of generation makes the room be in the time closed in expansion valve and keeps quite.And the expansion valve institute in opening
Corresponding indoor unit when expanding valve closing state due to having saved bit by bit some refrigerants, sufficient when expansion valve is opened
Refrigerant can also reduce the noise that refrigerant flowing generates in the indoor unit in reflux, improve user experience.
With reference to Fig. 2, Fig. 2 is the side that a kind of expansion valve interval made corresponding to the indoor unit of standby mode of the present invention is opened
Method flow diagram.
As shown in Fig. 2, in a kind of possible embodiment, step S200 may further include：
S210, all indoor units in standby mode are grouped, such as by all in the room of standby mode
Interior machine is grouped in a manner of one group of each two；
S220, it by the expansion valve corresponding to the indoor unit in making one to be grouped every time while in a manner of opening, controls all
Grouping is opened in turn.Such as under above-mentioned packet mode, with make every time one grouping in two indoor units corresponding to two it is swollen
The mode that swollen valve is opened simultaneously makes all groupings open in turn, that is, makes all expansion valves same two-by-two in order according to grouping
Shi Kaiqi.
Referring to Fig. 3, Fig. 3 is a kind of method flow being grouped to the indoor unit for being in standby mode of the present invention
Schematic diagram.
As shown in figure 3, being preferably carried out in mode in one kind, step S210 may further include again：
S211, obtain multi-connected air conditioning system indoor unit total quantity, as outdoor unit control chip pass through obtain ground
The mode of location coding counts the total quantity of indoor unit；Or when multi-connected air conditioning system is installed, in the control chip of outdoor unit
The total quantity information of middle storage indoor unit；It should be noted that the address coding of indoor unit is exclusive one of every indoor unit
Go here and there digital code, it can be stored in each indoor unit control chip on and can acquired in the control chip of outdoor unit,
Or can also be directly stored on the control chip of outdoor unit, controlled coremaking piece is called.
S212, the correspondence based on total quantity with maximum setting quantity, determine that the maximum of indoor unit in each grouping is set
Fixed number amount；As maximum setting quantity can be according to such as the following table 1 to should determine that：
Table 1
Certainly, above-mentioned method of determination is a kind of more side of being preferably carried out that the present inventor is obtained based on experiment
Formula, in the case of without departing from the principle of the invention, those skilled in the art can be based on more specifical application environment and maximum is set
The setting means of quantity is adjusted.
S213, quantity is set based on maximum, the indoor unit in standby mode is grouped.
Such as under above-mentioned setting means, by standby mode indoor unit be grouped the step of may further include：
I) it is maximum for each grouping distribution when maximum setting quantity is not more than the quantity of the indoor unit in standby mode
Set quantity indoor unit；As when machine sum indoors is 10, the quantity of indoor unit in standby mode is 5, according to table 1
Go out the maximum quantity that sets as 2, the indoor unit of 5 standby modes can be divided into 3 groups according to the sequencing of address coding at this time,
First group of 2 indoor unit, second group of 2 indoor unit, 1 indoor unit of third group.
Ii) when maximum setting quantity is more than the quantity of the indoor unit in standby mode, one is distributed for each grouping
Indoor unit；As when machine sum indoors is 12, the quantity of indoor unit in standby mode is 2, maximum setting is obtained according to table 1
Quantity is 3, then the indoor unit of 2 standby modes can be divided into 2 groups at this time, every group of 1 indoor unit.
Referring to Fig. 4, Fig. 4 is the side of the expansion valve corresponding to the indoor unit in a kind of one grouping of unlatching of the present invention
Method flow diagram.
As shown in figure 4, after being divided into group, " make the expansion corresponding to the indoor unit in a grouping every time in step S220
Valve is opened simultaneously " and may further include following steps：
The expansion valve corresponding to indoor unit in S221, control packet is same with the first Valve opening velocity in the first setting time
Shi Kaiqi；Preferably, the first setting time can be 1min, and the first Valve opening velocity may be used initially reaches 40P from 0, then
Every the interruption opening ways of 5s increases 20P, open expansion valve interruption.It the advantages of this arrangement are as follows can be in expansion valve
Aperture stop a certain amount of refrigerant of accumulation in the time risen, and then make refrigerant when the aperture of expansion valve continues increase
Reflux is abundant, to reduce the noise of indoor unit generation.Certainly, the first setting time and the first Valve opening velocity can be based on specific
Application scenarios are adjusted, and such as the first setting time can also be 0.5min or 2min, the first Valve opening velocity can also be every
10s increases 30P etc..
S222, when the aperture of expansion valve reaches the maximum setting aperture of the expansion valve, the expansion valve is made to stop valve opening；
Such as, maximum setting aperture can be determined based on the number of indoor unit, shown in table 2 specific as follows：
Table 2
Indoor unit is made not generate noise under above-mentioned control method it should be noted that maximum setting aperture can be represented
The maximum opening of expansion valve.
The expansion valve corresponding to indoor unit in S223, detection grouping works as unlatching with the opening time of the first Valve opening velocity
When time is more than the first setting time, the expansion valve corresponding to indoor unit in control packet is closed；As the first setting time can
Think 1min, in expansion valve initially to reach 40P from 0, then with every 5s open 20P interruption opening ways open process
In, the opening time of the control chip detection expansion valve of outdoor unit, when detecting that the opening time is more than 1min, close expansion valve
It closes.
In a kind of more preferably embodiment, in order to further improve the effect of noise control, increase as far as possible
The shut-in time of expansion valve is can further include the step of " all groupings of control are opened in turn " in step S320：
Judge the shut-in time of the expansion valve corresponding to the indoor unit in a upper grouping, be more than second when the shut-in time
During setting time, the expansion valve corresponding to the indoor unit in next grouping is controlled to open.If the second setting time can be 5min,
After the expansion valve of the control chip of outdoor unit one group of indoor unit in control is closed, the 5min times are spaced, then make next group of interior
Expansion valve in machine is opened.
After the expansion valve corresponding to indoor unit in all groupings is opened once, make the indoor unit institute in all groupings
Corresponding expansion valve remains turned-off in third setting time.Such as in the control chip of outdoor unit in control packet last group
The corresponding expansion valve of indoor unit when being closed after opening 1min, i.e., the corresponding expansion valve of indoor unit in all groupings is opened
1min and close after, be spaced 30min after, control it is all grouping carry out next rounds unlatchings in turn.In a kind of possible embodiment party
In formula, quantity that third setting time can be based on the indoor unit in standby mode and the indoor unit of multi-connected air conditioning system
Total quantity determines that specific method of determination is as shown in table 3 below：
Table 3
Excessive, the caused refrigerant deficient phenomena for number difference between preventing indoor unit is also based on booting rate of load condensate
Correction factor further is increased to third setting time, shown in table 4 specific as follows：
Table 4
That is, third setting time is the numerical value that is multiplied by the basis of the numerical value based on table 3 obtained by a correction factor.
It needs to explain, the booting rate of load condensate in table 4 can be equal to total number of the indoor unit in open state
With the ratio of total number of the indoor unit with multi-connected air conditioning system, which is used for characterizing the indoor unit institute in open state
Load accounts for the ratio of the total load of multi-connected air conditioning system.Proportion is smaller, it was demonstrated that the indoor unit in standby mode
Quantity is more, and the refrigerant for being now in the expansion valve accumulation of closed state is also more, and more frequent unlatching is also just needed to be in and is closed
The expansion valve of closed state to make the refrigerant circulation of accumulation in time.
The control flow of the noise control method of the present invention is illustrated with a kind of possible example below.
Assuming that multi-connected air conditioning system includes 1 outdoor unit and 10 indoor units.Wherein, 10 indoor units further comprise
The bedroom indoor unit that the parlor indoor unit and 8 numbers that 2 numbers are 3.0HP are 1.0HP.In the case of a kind of possibility, 2
Parlor indoor unit and 3 bedroom indoor units are in heating operation, have 5 bedroom indoor units to be in standby mode.So heating
After mode operation 3min, noise control method of the invention starts to perform.It is specific as follows：
(1) all indoor units in standby mode are grouped.As shown in Table 1, since indoor unit total quantity is 10,
Therefore the maximum of grouping sets quantity as 2, and 5 indoor units thus are divided into 3 groups by address coding, first group of 2 indoor unit, the
Two groups of 2 indoor units, 1 indoor unit of third group.
(2) each grouping is made to open in turn.Make the expansion valve of first group of 2 indoor unit first according to " initially being reached from 0
40pls, the speed that 20pls " is then opened every 5s open 1min (the first setting time), and expansion valve reaches during valve opening
180P (maximum setting aperture) stops valve opening；After being spaced 5min (the second setting time), make the expansion valve of second group of 2 indoor unit
1min is opened according to identical Valve opening velocity；After being spaced 5min again, the expansion valve of 1 indoor unit of third group is made to be opened according to identical
Valve speed opens 1min.After the indoor unit in third group is closed, the expansion valve of all indoor units simultaneously closes off 20min (thirds
Setting time), then restart three unlatchings in turn being grouped of next round.Wherein, third setting time is calculated by the following method
Go out：Booting rate of load condensate=9HP/14HP=64.3% is calculated, then show that correction factor is 1 by table 4；Standby indoor unit is calculated to account for
Then indoor unit total quantity proportion=5/10=50% show that third setting time is 20min by table 3；Calculate revised
Three setting time=20 × 1=20min.
In addition, in order to further increase the safety of multi-connected air conditioning system, the air-conditioning when using this control method is prevented
There is the situation of refrigerant missing in system, and in a kind of possible embodiment, noise control method of the invention can also be set
Following steps：
When any indoor unit is switched to standby mode by operating status, the control chip of outdoor unit makes the swollen of the indoor unit
Swollen valve is opened in the 4th setting time with first object aperture, and after the 4th setting time is continued, by the shape of the indoor unit
State is switched to standby mode.For example, when a certain indoor unit is switched to standby mode by heating operation, the control chip of outdoor unit
The expansion valve corresponding to the indoor unit is forced to keep the aperture of 350P in 1min, so that the refrigerant in the indoor unit is in 1min
Interior abundant reflux avoids what the indoor unit closed that refrigerant caused by expansion valve accumulates when entering standby mode immediately from asking
Topic.After 1min, control chip makes the state of the outdoor unit be switched to standby mode, and the outdoor unit is made to participate in aforementioned noise control side
The judgement of method.
When the compressor exhaust temperature of outdoor unit is not less than the aperture of the expansion valve corresponding to threshold temperature or outdoor unit
When not less than threshold value aperture and continuing five setting times, the expansion valve corresponding to all standby indoor units is made to be set simultaneously the 6th
It is opened in fixing time with the second target aperture.For example, when the compressor exhaust temperature of outdoor unit meets or exceeds 95 DEG C or room
When the aperture of expansion valve corresponding to outer machine meets or exceeds 400P and continues 1min, it was demonstrated that the coolant quantity of outdoor unit lacks
It loses, at this time opens the expansion valve corresponding to all standby indoor units to 80P simultaneously, saved bit by bit in these indoor unit pipelines to allow
Refrigerant flow back in time, the situation that refrigerant lacks is avoided to occur, improves the safety of air-conditioning system.
Certainly, the design parameter in above two control method is merely possible to example presentation, and those skilled in the art can
It is adjusted flexibly with being made according to practical application scenarios to it, to improve the security performance of air-conditioning system.
In conclusion using above-mentioned noise control method, the present invention can completely eliminate swollen when heating indoor unit is standby
The noise that the indoor unit corresponding to expansion valve that swollen valve is closed in opening process in turn generates, reduces in opening state
The noise that indoor unit corresponding to the expansion valve of state generates.And it adjusts process without making the original structure of air-conditioning system to change
It is dynamic, save complete machine cost, that is to say, that by the noise control method of the multi-connected air conditioning system of the present invention, solve existing
Have in technology and solve effect existing for the technical solution of the heating standby noise of indoor unit using heavy caliber electric expansion valve is replaced
The problem of poor, of high cost, improve user experience.
So far, it has been combined preferred embodiment shown in the drawings and describes technical scheme of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make the relevant technologies feature equivalent change or replacement, these
Technical solution after changing or replacing it is fallen within protection scope of the present invention.
Claims (10)
1. a kind of noise control method of multi-connected air conditioning system, the multi-connected air conditioning system includes outdoor unit and multiple interiors
Machine, each indoor unit are both provided with expansion valve, which is characterized in that the noise control method includes the following steps：
When the operational mode of the multi-connected air conditioning system is heating mode, the number of the indoor unit in standby mode is obtained
Amount；
When the quantity is more than amount threshold, the expansion valve corresponding to all indoor units in standby mode is controlled to be spaced apart
It opens.
2. the noise control method of multi-connected air conditioning system according to claim 1, which is characterized in that " in the quantity
During more than amount threshold, control the expansion valve interval unlatching corresponding to all indoor units in standby mode " the step of into one
Step includes：
All indoor units for being in standby mode are grouped；
In a manner of making the expansion valve corresponding to the indoor unit in a grouping every time while open, all groupings is controlled to open in turn
It opens.
3. the noise control method of multi-connected air conditioning system according to claim 2, which is characterized in that " make a grouping
In indoor unit corresponding to expansion valve open simultaneously " the step of further comprise：
The expansion valve corresponding to indoor unit in control packet is opened simultaneously in the first setting time with the first Valve opening velocity；
The expansion valve corresponding to the indoor unit in the grouping is detected with the opening time of the first Valve opening velocity, when the unlatching
Between be more than the first setting time when, the expansion valve corresponding to the indoor unit in the grouping is controlled to close.
4. the noise control method of multi-connected air conditioning system according to claim 3, which is characterized in that in " control packet
In indoor unit corresponding to expansion valve opened simultaneously with the first Valve opening velocity in the first setting time " the step of after, institute
Noise control method is stated to further include：
When the aperture of the expansion valve reaches the maximum setting aperture of the expansion valve, the expansion valve is made to stop opening.
5. the noise control method of multi-connected air conditioning system according to claim 4, which is characterized in that the expansion valve
Maximum setting aperture is determined based on the number of the indoor unit corresponding to the expansion valve.
6. the noise control method of multi-connected air conditioning system according to claim 2, which is characterized in that " all points of control
The step of group unlatching in turn ", further comprises：
Judge the shut-in time of the expansion valve corresponding to the indoor unit in a upper grouping, be more than the second setting when the shut-in time
During the time, the expansion valve corresponding to the indoor unit of next grouping is controlled to open.
7. the noise control method of multi-connected air conditioning system according to claim 6, which is characterized in that " make all groupings
The step of unlatching in turn ", further includes：
After the expansion valve corresponding to indoor unit in all groupings is opened once, make corresponding to the indoor unit in all groupings
Expansion valve closed in third setting time.
8. the noise control method of multi-connected air conditioning system according to claim 7, which is characterized in that the third setting
Quantity and the total quantity of the indoor unit of the multi-connected air conditioning system of the time based on the indoor unit in standby mode are true
It is fixed.
9. the noise control method of the multi-connected air conditioning system according to any one of claim 2 to 8, which is characterized in that
The step of " being grouped to all indoor units for being in standby mode ", further comprises：
Obtain the total quantity of the indoor unit of the multi-connected air conditioning system；
Correspondence based on the total quantity with maximum setting quantity determines the maximum setting number of indoor unit in each grouping
Amount；
Based on the maximum setting quantity, the indoor unit in standby mode is grouped.
10. the noise control method of multi-connected air conditioning system according to claim 9, which is characterized in that " based on described in most
The step of big setting quantity, by the indoor unit grouping in standby mode ", further comprises：
In quantity of the maximum setting quantity no more than the indoor unit in standby mode, for each grouping distribution institute
State the indoor unit of maximum setting quantity；
When the maximum setting quantity is more than the quantity of the indoor unit in standby mode, one is distributed for each grouping
Indoor unit.
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| CN201711252172.8A CN108168169B (en) | 2017-12-01 | 2017-12-01 | Noise control method of multi-connected air conditioning system |
| PCT/CN2018/088273 WO2019104965A1 (en) | 2017-12-01 | 2018-05-24 | Multi-connected air conditioning system noise control method |
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| CN201711252172.8A CN108168169B (en) | 2017-12-01 | 2017-12-01 | Noise control method of multi-connected air conditioning system |
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| CN114353249A (en) * | 2021-12-09 | 2022-04-15 | 青岛海尔空调电子有限公司 | Control method and device for multi-split air conditioner and multi-split air conditioner |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2019104965A1 (en) | 2019-06-06 |
| CN108168169B (en) | 2020-09-18 |
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