CN104344456B - The uneven control method of multi-online air-conditioning system and its off-premises station coolant distribution - Google Patents
The uneven control method of multi-online air-conditioning system and its off-premises station coolant distribution Download PDFInfo
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- CN104344456B CN104344456B CN201310323298.5A CN201310323298A CN104344456B CN 104344456 B CN104344456 B CN 104344456B CN 201310323298 A CN201310323298 A CN 201310323298A CN 104344456 B CN104344456 B CN 104344456B
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- premises station
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- conditioning system
- compressor
- coolant distribution
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
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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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention is applied to air-conditioning technical field, disclose the uneven control method of a kind of multi-online air-conditioning system and its off-premises station coolant distribution, its multi-online air-conditioning system includes at least two off-premises stations and the equalizing main between two adjacent outdoor units, off-premises station includes the compressor connected by pipeline, outdoor heat exchanger and gas-liquid separator, the first interface of outdoor heat exchanger connects indoor set by liquid lateral line, the two ends of equalizing main connect off-premises station by two branch lines respectively, a wherein branch line connection liquid lateral line, and the branch line is provided with choke valve；An other branch line connects the air inlet of gas-liquid separator, and the branch line is provided with the first control valve.Which passes through each choke valve and each first control valve controls the logical of each branch line respectively and closes, so, coolant can be made from many off-premises station liquid lateral line Jing equalizing mains stream of shunting to few off-premises station gas-liquid separator entrance is shunted, and the uneven purpose of off-premises station coolant distribution be adjusted so as to can reach.
Description
Technical field
The invention belongs to air-conditioning technical field, more particularly to a kind of multi-online air-conditioning system and its off-premises station coolant distribution are not
Equal control method.
Background technology
Existing multi-online air-conditioning system, including at least two off-premises stations, and off-premises station includes the pressure by pipeline connection
Contracting machine, outdoor heat exchanger and gas-liquid separator.In order to solve the problems, such as that coolant distribution is uneven between multiple stage off-premises station, which is in office
An equalizing main is respectively provided between the gas-liquid separator of two adjacent outdoor units of meaning, so that coolant passes through the equalizing main from shunting
The gas-liquid separator of many off-premises stations is upper on the gas-liquid separator for shunting few off-premises station, so be adjusted off-premises station it
Between coolant distribution.But, it is due to low-pressure side of the gas-liquid separator in the refrigerant circulation circuit and cold due to each off-premises station
Matchmaker's low-pressure lateral pressure is basically identical, therefore, in a particular application, the two ends of the equalizing main being connected between two gas-liquid separators
Substantially no pressure reduction, so, coolant is difficult to the upper gas to an other off-premises station of gas-liquid separator from an off-premises station
On liquid/gas separator, the uneven purpose of off-premises station coolant distribution is adjusted so as to not reach.
Therefore, using above-mentioned shunting scheme can not coolant distribution be uneven between effectively solving multiple stage off-premises station asks
Topic, so, in a particular application, often there is the uneven phenomenon of off-premises station coolant distribution in meeting Jing, so as to cause part off-premises station
On coolant can be on serious on the high side, part off-premises station coolant again can serious situation generation on the low side.And off-premises station coolant distribution
Uneven phenomenon can directly affect the reliability of air conditioning system operation, be embodied in：Coolant off-premises station on the high side holds
Compressor easily occur carries out the phenomenon of Wet Compression, the phenomenon for compressor liquid hammer being resulted even in when serious and being damaged；Coolant is on the low side
Off-premises station on the one hand easily there is the phenomenon that compressor effectively cannot be cooled down so that the temperature of compressor is higher, and then make
Compressor cannot run normal table, on the other hand can affect the refrigeration or heating effect of the off-premises station.
The content of the invention
Object of the present invention is to provide the uneven regulation of a kind of multi-online air-conditioning system and its off-premises station coolant distribution
Method, which aims to solve the problem that in existing multi-online air-conditioning system the uneven problem of coolant distribution between off-premises station.
The technical scheme is that：A kind of multi-online air-conditioning system, including at least two off-premises stations and located at two adjacent
Equalizing main between the off-premises station, the off-premises station include compressor, outdoor heat exchanger and the gas-liquid connected by pipeline
Separator, the first interface of the outdoor heat exchanger connect indoor set, the two ends difference of the equalizing main by liquid lateral line
Connect the off-premises station by two branch lines, in two branch lines of described equalizing main one end, wherein one
The branch line is connected with the liquid lateral line, and the branch line is provided with choke valve；An other branch line
It is connected with the air inlet of the gas-liquid separator, and the branch line is provided with the first control valve.
Further, the two ends of the equalizing main are also equipped with and lead to the close second control valve for controlling the pipeline.
Preferably, described second valve is controlled for stop valve or ball valve or electromagnetic switch valve.
Preferably, the choke valve is electric expansion valve.
Preferably, described first valve is controlled for electromagnetic switch valve.
Further, temperature sensor is additionally provided with the output channel of the exhaust outlet of compressor.
Specifically, the air entry of the compressor connects the gas outlet of the gas-liquid separator, the aerofluxuss of the compressor
The second interface of the mouth connection outdoor heat exchanger.
Further, the off-premises station also includes that for switching the cross valve that coolant is flowed to four of the cross valve connect
Mouth connects the second interface of the outdoor heat exchanger, the air vent of the compressor, the air inlet of the gas-liquid separator respectively
And indoor set.
Specifically, the number of compressors for arranging on an off-premises station is one or more than one, and an institute
State and be connected in parallel with each other between each described compressor on off-premises station.
Present invention also offers a kind of uneven control method of the off-premises station coolant distribution of above-mentioned multi-online air-conditioning system,
Before its system start-up operation, the choke valve and the first control valve is made to be in closed mode；After system start-up operation,
And when the uneven phenomenon of coolant distribution occur in two adjacent off-premises stations, the off-premises station more than coolant distribution amount is located
The choke valve of side is opened, and the first control valve of the off-premises station place side cuts out；Meanwhile, will be coolant distribution amount few
The choke valve of off-premises station place side close, and the first control valve of the off-premises station place side is opened；Until this
When the coolant distribution of the two adjacent off-premises stations is uniform, then the choke valve opened and first control opened are closed
Valve processed.
Specifically, the refrigerant temperature of each compressor of outdoor unit exhaust ports is detected using temperature sensor, when biphase
On the adjacent off-premises station, the refrigerant temperature difference of the exhaust outlet of compressor that temperature sensor is detected is more than or equal to setting
Critical temperature difference when, then judge that the two adjacent off-premises station has the uneven phenomenon of the coolant distribution amount.
More specifically, when the exhaust outlet of compressor that the temperature sensor is detected on the two adjacent off-premises stations
When refrigerant temperature difference is less than the critical temperature difference of the setting, then judge that the two adjacent outdoor units coolant distribution amount is uniform.
Multi-online air-conditioning system and its control method of off-premises station coolant distribution inequality that the present invention is provided, which passes through flat
The two ends of weighing apparatus pipeline are respectively provided with two branch lines, and make two branch lines of one end connect the liquid side of an off-premises station respectively
Pipeline and gas-liquid separator air inlet, the liquid lateral line that other end of two branch paths connect another off-premises station respectively are gentle
Liquid/gas separator air inlet.Meanwhile, the break-make of the branch line being connected with liquid lateral line by throttle valve control, by the first control
The break-make of the branch line that valve control is connected with gas-liquid separator air inlet, so, by controlling choke valve and the first control valve
Keying operation, coolant is flowed from the liquid lateral line of many off-premises stations of shunting to shunting few off-premises station gas-liquid separation
On device.And the high-pressure side due to liquid lateral line in refrigerant circulation circuit, gas-liquid separator air inlet is in refrigerant circulation time
Low-pressure side in road, therefore, which can make the two ends of equalizing main have larger pressure reduction, so, beneficial to coolant from many rooms of shunting
Outer machine is upper to shunting on few off-premises station, effectively adjust the uneven purpose of off-premises station coolant distribution, Jin Eryou so as to can reach
Effect ensure that the reliability of the multi-online air-conditioning system operation.
Description of the drawings
Fig. 1 is the structural representation of multi-online air-conditioning system provided in an embodiment of the present invention；
Fig. 2 is that coolant provided in an embodiment of the present invention is upper to the work shunted on few off-premises station from many off-premises stations of shunting
Make view；
Fig. 3 is the working state schematic representation that multi-online air-conditioning system provided in an embodiment of the present invention carries out quick defrost；
Fig. 4 is the working state schematic representation that multi-online air-conditioning system provided in an embodiment of the present invention carries out Liquid injection cooling.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1 to 4, multi-online air-conditioning system provided in an embodiment of the present invention, which includes at least two off-premises stations 1
And the equalizing main 2 between two adjacent outdoor units 1, i.e., an equalizing main is equipped between any two adjacent outdoor units 1
2；Off-premises station 1 includes compressor 11, outdoor heat exchanger 12 and the gas-liquid separator 13 connected by pipeline, outdoor heat exchanger 12
First interface f connects indoor set by liquid lateral line 16（Not shown in figure）, the two ends of equalizing main 2 pass through two branched pipes
The connection of road 3 off-premises station 1, the 3 connection liquid lateral line 16 of a branch line in two branch lines 3 of 2 one end of equalizing main, and
The branch line 3 is provided with choke valve 4；An other branch line 3 connects the air inlet c of gas-liquid separator 13, and the branch
Pipeline 3 is provided with the first control valve 5.The setting of branch line 3, for realizing the connection between equalizing main 2 and off-premises station 1,
And the setting of choke valve 4 and the first control valve 5, it is respectively used to the logical of two branch lines 3 of effective control and closes situation.Concrete application
In, when the uneven situation of shunting occur in two adjacent off-premises stations 1（That is the coolant distribution of an off-premises station 1 is more, another off-premises station
1 coolant distribution amount is few）When, then the choke valve 4 of 1 side of off-premises station more than coolant distribution amount is opened, and by 1 side of off-premises station
First control valve 5 cuts out；And the choke valve 4 of coolant distribution amount few 1 side of off-premises station cuts out, and by the of 1 side of off-premises station
One control valve 5 is opened, and so, the liquid lateral line 16 on the off-premises station 1 more than shunt volume can be made few with shunt volume by equalizing main 2
Off-premises station 1 gas-liquid separator 13 be in connected state, so as to coolant can be made to be flowed between two off-premises stations 1
It is logical.Specifically, the high-pressure side due to 1 liquid lateral line 16 of off-premises station in refrigerant circulation circuit, gas-liquid separator 13 is in cold
Low-pressure side in matchmaker's closed circuit, therefore, as 12 first interface f of outdoor heat exchanger and shunt volume on the off-premises station 1 more than shunt volume
When the gas-liquid separator 13 of few off-premises station 1 is in connected state, the equalizing main 2 being connected between the two off-premises stations 1
Two ends can have larger pressure reduction, so, coolant can be made to flow from the liquid lateral line 16 of many off-premises stations 1 of shunting few to shunting
On 1 gas-liquid separator 13 of off-premises station, so as to reach effective purpose for adjusting coolant distribution amount between the two off-premises stations 1, enter
And the reliability of the multi-online air-conditioning system operation has been effectively ensured.
Specifically, it is known that the coolant in 1 liquid lateral line 16 of off-premises station is mostly the liquid refrigerants of middle temperature high pressure；And
Gas-liquid mixed state coolant of the coolant on gas-liquid separator 13 for low-temp low-pressure, therefore, if 1 liquid side pipe of the off-premises station more than shunt volume
High-pressure liquid coolant in road 16 is flowed directly on few 1 gas-liquid separator 13 of off-premises station of shunt volume, then on the one hand can make coolant
On the few off-premises station 1 of flow, the liquid measure of compressor 11 increases significantly, so as to easily make flow few off-premises station 1 on compressor 11
The phenomenon for liquid hammer occur and damaging；On the other hand the refrigerant temperature into the compressor 11 can be made higher, so as to be unfavorable for the pressure
Contracting machine 11 is cooled down.Therefore, in order to ensure the reliability of few 1 system operation of off-premises station of flow, the setting of choke valve 4,
In addition to the logical purpose closed of effective control its place branch line 3 is reached, should also play a part of reducing pressure by regulating flow, so that shunting
4 reducing pressure by regulating flow of high-pressure liquid coolant warp knuckle stream valve in many 1 liquid lateral lines 16 of off-premises station of amount is converted to the vaporific of low-temp low-pressure
After coolant, then it is transported on few 1 gas-liquid separator 13 of off-premises station of shunt volume.
Preferably, choke valve 4 is electric expansion valve, by the keying for controlling electric expansion valve, can effectively reach and control which
The purpose that place branch line 3 is opened and closed.And different degrees of aperture after controlling electric expansion valve unlatching, different journeys can be played
The reducing pressure by regulating flow effect of degree, so, it is low that the liquid refrigerants of middle temperature high pressure can be exchanged into low temperature Jing after electric expansion valve reducing pressure by regulating flow
The vaporific coolant of pressure, so as to make from the 1 liquid lateral line 16 of off-premises station more than shunt volume to flow to few 1 gas-liquid separation of off-premises station of shunting
Mist of the coolant on device 13 in low-temp low-pressure, and then the reliable and stable of few 1 system operation of off-premises station of flow is effectively ensured
Property.And as electric expansion valve has the features such as reaction is fast, control accuracy is high, therefore, which can improve the service behaviour of choke valve 4.
Of course, choke valve 4 may also be employed other choke valves, such as heating power expansion valve etc., or choke valve 4 may also be employed stop valve and hair
The combination of tubule, in concrete application, can be optimized design according to actual conditions.
Specifically, close as the first control valve 5 is mainly used in control the logical of its place branch line 3, therefore, the first control valve
5 preferred switch valves, so, can simplify the control process of the first control valve 5.The switch valve can be manual switch valve（Control manually
The switch valve of system）, alternatively electromagnetic switch valve（The switch valve of Electronic control）.As a preferred embodiment of the present invention, first
Control valve 5 is electromagnetic switch valve, so, on the one hand can improve air conditioning system automaticity in the application, so as to improve
On the other hand user can improve the control accuracy of the air conditioning system running using the comfort level in product process.
Further, as depicted in figs. 1 and 2, temperature sensor is additionally provided with the output channel of 11 air vent b of compressor
14, the refrigerant temperature that temperature sensor 14 is used on 11 air vent b output channels of real-time detection compressor.It is to be appreciated that many
Online air-conditioning system also has the controller for control system operation（Not shown in figure）.The present embodiment, choke valve 4, first
Control valve 5 and temperature sensor 14 electrically connect controller, and each choke valve 4 and each first control valve 5 are in normally off, control
Device processed is controlled each choke valve 4 and each first control according to the detection value of feedback of temperature sensor 14 on two adjacent outdoor units 1
The open/close states of valve 5.It is known that for the compressor 11 of same efficiency, if cold medium flux is more, its compressed exhaust goes out
Refrigerant temperature it is lower；Conversely, if cold medium flux is fewer, the refrigerant temperature that its compressed exhaust goes out is higher.Therefore, this reality
Example is applied, carries out judging on two off-premises station 1 according to the refrigerant temperature relation of 11 air vent b of compressor on two adjacent outdoor units 1
11 air vent b refrigerant temperatures of compressor low off-premises station 1 is judged that coolant distribution amount is more, by compressor 11 by cold medium flux situation
The high off-premises station 1 of air vent b refrigerant temperatures judges that coolant distribution amount is few.In concrete application, detection can be carried out when two according to test
Adjacent outdoor units 1 occur coolant distribution amount it is uneven when, at two adjacent outdoor units, 1 compressor, 11 air vent b, coolant is critical
Temperature gap TP；And set critical temperature difference TP in advance on the controller, so, if temperature is passed on two adjacent outdoor units 1
When the refrigerant temperature difference of the 11 air vent b of compressor that sensor 14 is detected is more than or equal to critical temperature difference TP for setting,
Then controller judges that two adjacent outdoor units 1 have the uneven phenomenon of coolant distribution amount；Now, by controller by compressor
The choke valve 4 of low 1 side of off-premises station of 11 air vent b refrigerant temperatures is opened, and the first control valve 5 of 1 side of off-premises station cuts out,
And the choke valve 4 of 11 air vent b refrigerant temperatures of compressor high 1 side of off-premises station cuts out, and first on the off-premises station 1 is controlled
Valve processed 5 is opened, and so, can make coolant from low 1 upstream of off-premises station of 11 air vent b refrigerant temperatures of compressor to 11 aerofluxuss of compressor
On the high off-premises station 1 of mouth b refrigerant temperatures, so as to can effectively reach the purpose for adjusting cold medium flux distribution, and then off-premises station 1 can be made
Between coolant distribution it is gradually uniform.The 11 air vent b's of compressor detected when temperature sensor 14 on two adjacent outdoor units 1
When refrigerant temperature difference is less than critical temperature difference TP for setting, then judge that the coolant distribution amount of two adjacent outdoor units 1 is in
Uniform state；Now, each choke valve 4 and the first control valve 5 are closed by controller, it is outdoor from one to prevent coolant from continuing
1 upstream of machine is on another off-premises station 1.In the present embodiment, the aperture of the choke valve 4 of conducting state, by controller according to detection
To two adjacent outdoor units 1 on 11 air vent b refrigerant temperature differences of compressor be adjusted, compressor on two adjacent outdoor units 1
The refrigerant temperature difference of 11 air vent b is bigger, then the aperture of choke valve 4 is bigger；On the contrary, compressor on two adjacent outdoor units 1
The refrigerant temperature difference of 11 air vent b is less, then the aperture of choke valve 4 is less.The present embodiment, controller are passed by each temperature
The detection temperature value of the feedback of sensor 14 carries out judging whether two adjacent outdoor units 1 coolant distribution amount non-uniform phenomenon occur and control
The keying of each choke valve 4 and the first control valve 5；Of course, in concrete application, two adjacent outdoor units, 1 coolant distribution amount is uneven
Even phenomenon may also be employed alternate manner and be detected, i.e., each choke valve 4 and the first control valve 5 also can be carried out otherwise
Control is opened and closed, and such as controller can carry out judging biphase according to the pipeline pressure of the refrigeration of indoor set, heating effect or off-premises station 1
Whether adjacent off-premises station 1 there is the uneven phenomenon of coolant distribution amount and controls the keying of each choke valve 4 and each first control valve 5,
During specific design, design can be optimized according to actual conditions.
Further, shown as shown in Figure 1, Figure 3 and Figure 4, the two ends of equalizing main 2 are also equipped with and lead to what is closed for control pipeline
Second control valve 6.The two second control valves 6 at the two ends of equalizing main 2 are in normally off, and when on two adjacent outdoor units 1
Critical temperature difference of the refrigerant temperature difference of the 11 air vent b of compressor that temperature sensor 14 is detected more than or equal to setting
During TP, then two second control valves 6 between two adjacent outdoor units 1 are opened, in order on the off-premises station 1 more than shunt volume
Coolant can be transported on the few off-premises station 1 of shunt volume from equalizing main 2.The present embodiment, the setting of the second control valve 6, on the one hand
For the logical compactness closed of equalizing main 2, and separately maintaining beneficial to later stage each off-premises station is effectively ensured；On the other hand can also lead to
Cross with choke valve 4 and the first control valve 5 with the use of making the multi-online air-conditioning system that there is quick defrost and hydrojet is cooled down
Function.In concrete application, when an off-premises station 1 meets needs carries out the condition of defrost, can be by the choke valve of 1 side of off-premises station
4 and first control valve 5 open, and the aperture of choke valve 4 is opened to maximum, while by the second control valve 6 of 1 side of off-premises station
Close；Now, two branch lines 3 of 1 side of off-premises station are in connected state, and can make 1 liquid side of off-premises station on the off-premises station 1
The choke valve 4 of most of coolant direct Jing 1 sides of off-premises station in pipeline 16 and the first control stream of valve 5 arrive the gas of the off-premises station 1
On liquid/gas separator 13, so, the cycle period of the part coolant is on the one hand substantially shorter, so as to realize the fast of the off-premises station 1
Fast defrost effect；On the other hand as the temperature of the part coolant is of a relatively high, so, can make from compressor 11 give off it is cold
Matchmaker's temperature is also higher, so as to be beneficial to accelerate the defrost progress of the off-premises station 1.And when the temperature of an outdoor unit discharge is very high,
Then the choke valve 4 of 1 side of off-premises station and the first control valve 5 are opened, and the aperture of choke valve 4 is opened less, while should
Second control valve 6 of 1 side of off-premises station cuts out；Now, two branch lines 3 of 1 side of off-premises station are in connected state, and can make
Gas-liquid separator is ejected in vaporific after 4 reducing pressure by regulating flow cooling of part coolant warp knuckle stream valve in the 1 liquid lateral line 16 of off-premises station
On 13, so, can be to playing a part of to cool into the return-air side coolant on gas-liquid separator 13, so as to be lowered into
Refrigerant temperature in compressor 11, and then the delivery temperature of compressor 11 can be reduced, that is, reach the purpose of Liquid injection cooling.This enforcement
Example, simply by the different opening of control choke valve 4, you can realize that the quick defrost work of the multi-online air-conditioning system and hydrojet are cold
But what is worked is switched fast, its simple structure, simple to operation, practical.
Specifically, the second control valve 6 can be stop valve or ball valve or electromagnetic switch valve, stop valve, ball valve and electromagnetism
Switch valve can reach effective control pipeline and lead to the purpose closed, and in concrete application, the second control valve 6 can be carried out according to actual conditions
Optimization design is selected.Preferably, the present embodiment, the second control valve 6 adopt stop valve, stop valve to have long service life, control
Convenient, easy to manufacture, easy to maintenance the features such as.
Specifically, as shown in figure 1, the air entry a of compressor 11 connects the gas outlet d of gas-liquid separator 13, compressor 11
Air vent b connect outdoor heat exchanger 12 second interface e, the 1 liquid lateral line 16 of air inlet c and off-premises station of gas-liquid separator 13
It is connected with indoor set.More specifically, off-premises station 1 also includes throttle part（Not shown in figure）, the throttle part preferably adopts
Electric expansion valve, and throttle part is provided with the branch line 3 of choke valve 4 located between 1 liquid lateral line 16 of off-premises station and indoor set
One end is connected on the connecting line between off-premises station liquid lateral line 16 and throttle part, and the other end is connected with equalizing main 2.Pressure
The coolant of low-temp low-pressure of the contracting machine 11 for will enter in which from its air entry a, after the compressed coolant for being converted to High Temperature High Pressure
Discharge from its air vent b.Gas-liquid separator 13 is for the gas-liquid mixed coolant that will enter in which from its air inlet c, Jing gas-liquids point
Gaseous coolant is transported to after the air entry a of compressor 11 from its gas outlet d.Outdoor heat exchanger 12 is used to flow through thereon
Coolant is exchanged heat with other media, to obtain the coolant under corresponding state.Preferably, outdoor heat exchanger 12 adopts air-cooled heat exchange
Device, fin, the heat exchanger tube being arranged on fin and the fan located at fin side or top which includes uniform intervals arrangement, tool
In body application, coolant is in heat exchange Bottomhole pressure, and is exchanged heat with the outside air for flowing through the air cooling heat exchanger.Which is due to adopting
The air of cheap, wide material sources as the medium exchanged heat with coolant, therefore, can effectively reduce the money in the application of outdoor heat exchanger 12
Source consuming cost.
Further, as shown in figures 1-4, off-premises station 1 is also included for switching the reversal valve 15 that coolant is flowed to, compressor
11 air vent b is commutated by reversal valve 15 and connects second interface e and indoor set of outdoor heat exchanger 12, gas-liquid separator 13
Air inlet c is commutated by reversal valve 15 and connects second interface e and indoor set of outdoor heat exchanger 12.The setting of reversal valve 15 can be with
Effectively realize coolant flow direction be switched fast, such that it is able to make multi-online air-conditioning system easily in refrigeration work state, heat
Switch between working condition and recuperation of heat working condition, and then can make the multi-online air-conditioning system that there is refrigerating function, system
Hot merit energy and heat recovery function, its simple structure are practical.Of course, in concrete application, can also be not provided with reversal valve 15,
And make the multi-online air-conditioning system that only there is refrigerating function.
Preferably, reversal valve 15 be cross valve, and its four interfaces connect respectively outdoor heat exchanger 12 second interface e,
The air vent b of compressor 11, the air inlet c of gas-liquid separator 13 and indoor set.Cross valve commutation simple and flexible, which applies to many
To in the connecting line of commutation, the quantity of connection member, and cross valve are being met on the premise of commutation is required and are being effectively reduced
Standard component can be adopted, so, its Design and Machining process can be simplified.In concrete application, when cross valve switches to outdoor heat exchanger 12
During the state that second interface e is turned on 13 air inlet c of gas-liquid separator conductings, 11 air vent b of compressor and indoor set, the outdoor
Machine 1 is in and heats working condition；Turn on 11 air vent b of compressor when cross valve switches to 12 second interface e of outdoor heat exchanger,
During the state that 13 air inlet c of gas-liquid separator is turned on indoor set, the off-premises station 1 is in refrigeration work state.
Specifically, 11 quantity of compressor for arranging on an off-premises station 1 is one or more than one, and when an off-premises station
When 11 quantity of compressor on 1 is multiple stage, it is connected in parallel with each other between each compressor 11 on same off-premises station 1.Compressor 11
Quantity design can be optimized according to concrete refrigeration or heating needs and cost.
As shown in Fig. 2 present invention also offers the uneven tune of the off-premises station coolant distribution of above-mentioned multi-online air-conditioning system
Section method, before its system start-up operation, makes each choke valve 4 and each first control valve 5 be in normal closed mode；
After system start-up operation, the coolant at 1 compressor of each off-premises station, 11 air vent b is detected using temperature sensor 14
Temperature, the refrigerant temperature difference of the 11 air vent b of compressor detected when temperature sensor 14 on adjacent two off-premises station 1 be more than or
Equal to critical temperature difference TP of setting（In concrete application, critical temperature difference TP can be obtained according to testing inspection）When, then sentence
There is the uneven phenomenon of coolant distribution amount in fixed two adjacent outdoor units 1；Now, then by 11 air vent b refrigerant temperatures of compressor
Low 1 side of off-premises station（1 place side of off-premises station i.e. more than coolant distribution amount）Choke valve 4 open, and by the 1 place side of off-premises station
It is described first control valve 5 close, meanwhile, by 11 air vent b refrigerant temperatures of compressor high 1 side of off-premises station（That is coolant distribution
The few 1 place side of off-premises station of amount）Choke valve 4 close, and the first of the 1 place side of off-premises station the control valve 5 is opened, so,
1 liquid lateral line 16 of off-premises station and the few room of coolant distribution amount on the off-premises station 1 more than coolant distribution amount can be made by equalizing main 2
The gas-liquid separator 13 of outer machine 1 is in connected state, and as 1 liquid lateral line 16 of off-premises station is in the height in refrigerant circulation circuit
Pressure side, low-pressure side of the gas-liquid separator 13 in refrigerant circulation circuit, therefore, now, it is connected between the two off-premises stations 1
The two ends of equalizing main 2 can have larger pressure reduction, so, can make coolant from Jing in many 1 liquid lateral lines 16 of off-premises station of shunting
Choke valve 4 is flowed on few 1 gas-liquid separator 13 of off-premises station of shunting, so as to reach between effective the two off-premises stations 1 of regulation
The purpose of coolant distribution amount, and then the reliability of the multi-online air-conditioning system operation has been effectively ensured.
Until the refrigerant temperature as temperature sensor 14 is detected on two adjacent outdoor units 1 11 air vent b of compressor it is poor
When value is less than critical temperature difference TP of the setting, then judge that the coolant distribution amount of two adjacent outdoor units 1 is in uniform shape
State, now, then closes the choke valve 4 opened and first for having opened control valve 5, so, can prevent coolant from continuing from one
Flow in the liquid lateral line 16 of off-premises station 1 on the gas-liquid separator 13 of another off-premises station 1, it is empty so as to the multi-connected machine is effectively ensured
The uniformity shunted on each off-premises station of adjusting system 1.
Further, as shown in figure 3, the embodiment of the present invention additionally provides the quick defrost side of above-mentioned multi-online air-conditioning system
Method, the reversal valve 15 of the off-premises station 1 is then switched to outdoor heat exchanger 12 the when an off-premises station 1 enters defrost and works by which
The state that two interface e and 11 air vent b of compressor conducting, 13 air inlet c of gas-liquid separator are turned on indoor set, while by the room
The choke valve 4 of 1 side of outer machine and the first control valve 5 are opened, and the aperture of choke valve 4 reaches maximum, and by 1 side of off-premises station
Second control valve 6 cuts out；Now, two branch lines 3 of 1 side of off-premises station are in connected state, and can make on the off-premises station 1
Gas-liquid of the direct warp knuckle stream valve 4 of most of coolant and the first control valve 5 stream in 1 liquid lateral line 16 of off-premises station to the off-premises station 1
On separator 13, so as to the part coolant can be made to be quickly returning in compressor 1.So, can make most of coolant directly in compression
It is circulated between machine 11, outdoor heat exchanger 12 and gas-liquid separator 13, so as to the defrost for effectively accelerating the off-premises station 1 is entered
Degree.When all of off-premises station 1 all enters defrost to work, then all of reversal valve 15 is switched to into outdoor heat exchanger 12 second
The state of interface e and 11 air vent b of compressor conductings, 13 air inlet c of gas-liquid separator and indoor set conducting, while will be had family
The choke valve 4 of 1 side of outer machine and the first control valve 5 are opened, and the aperture of choke valve 4 reaches maximum, and by 1 side of all off-premises stations
Second control valve 6 open, so, multiple stage off-premises station 1 can be made while carrying out quick defrost work；Of course, outside multiple stage room
When machine 1 carries out quick defrost work simultaneously, each second control valve 6 can also be in closed mode.
Further, as shown in figure 4, the embodiment of the present invention additionally provides the Liquid injection cooling of above-mentioned multi-online air-conditioning system
Method, which, then will be the choke valve 4 of 1 side of off-premises station and the first control valve 5 equal when the temperature of 1 aerofluxuss of off-premises station is very high
Open, and the aperture of choke valve 4 is opened less, while the second control valve 6 of 1 side of off-premises station cuts out；Now, the off-premises station
Two branch lines 3 of 1 side are in connected state, and the part of 12 first interface f of outdoor heat exchanger on the off-premises station 1 can be made cold
It is ejected on gas-liquid separator 13, so in vaporific after the cooling of 4 reducing pressure by regulating flow of matchmaker's warp knuckle stream valve, can be to into gas-liquid separator 13
On return-air side coolant play a part of to cool, so as to the refrigerant temperature that can be lowered in compressor 11, and then can drop
The delivery temperature of low compression machine 11, that is, reach the purpose of Liquid injection cooling.When aerofluxuss all temperature of all off-premises stations 1, can be by institute
The second control valve 6 having is opened or closed, while all of choke valve 4 and the first control valve 5 are opened, and makes choke valve
4 aperture is opened less, so, can make multiple stage off-premises station 1 while carrying out Liquid injection cooling；Of course, multiple stage off-premises station 1 is simultaneously
When carrying out Liquid injection cooling work, each second control valve 6 can also be in closed mode.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Any modification, equivalent or improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (12)
1. a kind of multi-online air-conditioning system, including at least two off-premises stations and the balance pipe between the two adjacent off-premises stations
Road, the off-premises station include compressor, outdoor heat exchanger and the gas-liquid separator connected by pipeline, the outdoor heat exchanger
First interface connects indoor set by liquid lateral line, it is characterised in that：The two ends of the equalizing main pass through Liang Tiao branches respectively
Pipeline connects the off-premises station, in two branch lines of described equalizing main one end, wherein a branch line
It is connected with the liquid lateral line, and the branch line is provided with choke valve；An other branch line and the gas-liquid point
Air inlet from device connects, and the branch line is provided with the first control valve；In the multi-online air-conditioning system running,
When two adjacent off-premises stations occur coolant distribution it is uneven when, by described in the off-premises station place side more than coolant distribution amount
Choke valve is opened, and the first control valve of the off-premises station place side cuts out, while by coolant distribution amount few off-premises station
The first control valve of place side is opened, and the choke valve of the off-premises station place side cuts out, until the two adjacent institute
State off-premises station coolant distribution it is uniform when, close the choke valve opened and opened it is described first control valve.
2. multi-online air-conditioning system as claimed in claim 1, it is characterised in that：The two ends of the equalizing main are also equipped with use
In control the pipeline lead to close second control valve.
3. multi-online air-conditioning system as claimed in claim 2, it is characterised in that：Described second controls valve for stop valve or ball
Valve or electromagnetic switch valve.
4. multi-online air-conditioning system as claimed in claim 1, it is characterised in that：The choke valve is electric expansion valve.
5. multi-online air-conditioning system as claimed in claim 1, it is characterised in that：Described first controls valve for electromagnetic switch valve.
6. the multi-online air-conditioning system as described in any one of claim 1 to 5, it is characterised in that：The exhaust outlet of compressor
Temperature sensor is additionally provided with output channel.
7. multi-online air-conditioning system as claimed in claim 1, it is characterised in that：The air entry of the compressor connects the gas
The gas outlet of liquid/gas separator, the air vent of the compressor connect the second interface of the outdoor heat exchanger.
8. multi-online air-conditioning system as claimed in claim 7, it is characterised in that：The off-premises station is also included for switching coolant
The cross valve of flow direction, four interfaces of the cross valve connect the second interface of the outdoor heat exchanger, the compressor respectively
Air vent, the air inlet of the gas-liquid separator and indoor set.
9. multi-online air-conditioning system as claimed in claim 8, it is characterised in that：The pressure arranged on one off-premises station
Contracting machine quantity is to be connected in parallel with each other between each described compressor in multiple stage, and an off-premises station.
10. the uneven control method of the off-premises station coolant distribution of a kind of multi-online air-conditioning system, the multi-online air-conditioning system bag
At least two off-premises stations and the equalizing main between the two adjacent off-premises stations are included, the off-premises station includes connecting by pipeline
Compressor, outdoor heat exchanger and the gas-liquid separator for connecing, the first interface of the outdoor heat exchanger pass through liquid lateral line junction chamber
Interior machine, it is characterised in that：
The two ends of the equalizing main connect the off-premises station, the institute of described equalizing main one end by two branch lines respectively
State in two branch lines, wherein a branch line is connected with the liquid lateral line, and the branch line is provided with section
Stream valve；An other branch line is connected with the air inlet of the gas-liquid separator, and the branch line is provided with first
Control valve；
Before system start-up operation, the choke valve and the first control valve is made to be in closed mode；
After system start-up operation, and when the uneven phenomenon of coolant distribution occur in two adjacent off-premises stations, by coolant distribution
The choke valve of many off-premises station place sides of amount is opened, and the first control valve of the off-premises station place side is closed
Close；Meanwhile, the choke valve of coolant distribution amount few off-premises station place side cuts out, and by described in the off-premises station place side
First control valve is opened；
When the coolant distribution of the two adjacent off-premises station is uniform, then closes the choke valve opened and opened
The first control valve.
The uneven control method of the off-premises station coolant distribution of 11. multi-online air-conditioning systems as claimed in claim 10, its feature
It is：The refrigerant temperature of each compressor of outdoor unit exhaust ports is detected using temperature sensor, when the two adjacent outdoors
Critical temperature of the refrigerant temperature difference of the exhaust outlet of compressor that temperature sensor is detected more than or equal to setting on machine
During difference, then judge that the two adjacent off-premises station has the uneven phenomenon of the coolant distribution amount.
The uneven control method of the off-premises station coolant distribution of 12. multi-online air-conditioning systems as claimed in claim 11, its feature
It is：When the refrigerant temperature difference of the exhaust outlet of compressor that the temperature sensor on the two adjacent off-premises stations is detected
Less than the setting critical temperature difference when, then judge that the two adjacent outdoor units coolant distribution amount is uniform.
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| CN201310323298.5A CN104344456B (en) | 2013-07-29 | 2013-07-29 | The uneven control method of multi-online air-conditioning system and its off-premises station coolant distribution |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748440B (en) * | 2015-03-31 | 2017-06-27 | 广东美的制冷设备有限公司 | The control method of air-conditioning system and air-conditioning system |
| CN105485771B (en) * | 2016-01-04 | 2018-12-07 | 广东美的暖通设备有限公司 | Air-conditioning system and its refrigerant recovering control method and device |
| CN105509389A (en) * | 2016-01-26 | 2016-04-20 | 南京西百客汽车空调有限公司 | Air conditioning system of automobile |
| CN106642450B (en) * | 2016-11-10 | 2019-01-04 | 珠海格力电器股份有限公司 | Multi-split refrigerant balance system and multi-split air conditioner |
| CN106556113B (en) * | 2016-11-28 | 2019-07-26 | 广东美的暖通设备有限公司 | Multi-line system and its middle pressure restricting element control method |
| CN109708272A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | The control method of the electric expansion valve of outer machine in parallel |
| CN111795481B (en) * | 2019-04-08 | 2023-05-23 | 开利公司 | Air conditioning system and control method therefor |
| CN110173821B (en) * | 2019-05-29 | 2021-03-16 | 南京天加环境科技有限公司 | Multi-split system capable of improving defrosting effect and control method thereof |
| CN110360709B (en) * | 2019-06-14 | 2022-04-22 | 青岛海尔空调电子有限公司 | Multi-split air conditioning system and control method thereof |
| CN110360710B (en) * | 2019-06-14 | 2022-03-29 | 青岛海尔空调电子有限公司 | Multi-split air conditioning system and control method thereof |
| CN114857666B (en) * | 2022-05-31 | 2023-08-01 | 青岛海信日立空调系统有限公司 | Multi-connected air conditioner |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1285488A (en) * | 1992-02-28 | 2001-02-28 | 三洋电机株式会社 | Air conditioner |
| CN1609526A (en) * | 2003-10-20 | 2005-04-27 | Lg电子株式会社 | System and method for controlling air conditioner |
| CN1786603A (en) * | 2004-12-06 | 2006-06-14 | Lg电子株式会社 | Multi-air condition system and method for controlling the same |
| CN101113854A (en) * | 2006-07-26 | 2008-01-30 | 海尔集团公司 | Oil equalizing and coolant counterbalancing system of multiple air-conditioning unit and controlling method thereof |
| CN201348342Y (en) * | 2009-01-16 | 2009-11-18 | 广东美的电器股份有限公司 | Air conditioner outdoor unit system |
| CN102353120A (en) * | 2011-08-31 | 2012-02-15 | 宁波奥克斯电气有限公司 | Control method for preventing refrigerant partial flowing in refrigeration of multi-connection-type air-conditioning unit |
| CN102767887A (en) * | 2012-05-09 | 2012-11-07 | 美的集团有限公司 | Multi-split air conditioning system and control method thereof |
| CN102914027A (en) * | 2012-09-20 | 2013-02-06 | 宁波奥克斯电气有限公司 | Control method for preventing refrigerant of outdoor unit from bias flowing during refrigeration of multi-split air-conditioning unit |
| CN202792279U (en) * | 2012-08-21 | 2013-03-13 | 广东美的暖通设备有限公司 | Multiple on-line air-conditioning system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002286317A (en) * | 2001-03-27 | 2002-10-03 | Kubota Corp | Vapor compression heat pump |
| KR100540808B1 (en) * | 2003-10-17 | 2006-01-10 | 엘지전자 주식회사 | Control method for Superheating of heat pump system |
-
2013
- 2013-07-29 CN CN201310323298.5A patent/CN104344456B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1285488A (en) * | 1992-02-28 | 2001-02-28 | 三洋电机株式会社 | Air conditioner |
| CN1609526A (en) * | 2003-10-20 | 2005-04-27 | Lg电子株式会社 | System and method for controlling air conditioner |
| CN1975276A (en) * | 2003-10-20 | 2007-06-06 | Lg电子株式会社 | System and method for controlling air conditioner |
| CN1786603A (en) * | 2004-12-06 | 2006-06-14 | Lg电子株式会社 | Multi-air condition system and method for controlling the same |
| CN101113854A (en) * | 2006-07-26 | 2008-01-30 | 海尔集团公司 | Oil equalizing and coolant counterbalancing system of multiple air-conditioning unit and controlling method thereof |
| CN201348342Y (en) * | 2009-01-16 | 2009-11-18 | 广东美的电器股份有限公司 | Air conditioner outdoor unit system |
| CN102353120A (en) * | 2011-08-31 | 2012-02-15 | 宁波奥克斯电气有限公司 | Control method for preventing refrigerant partial flowing in refrigeration of multi-connection-type air-conditioning unit |
| CN102767887A (en) * | 2012-05-09 | 2012-11-07 | 美的集团有限公司 | Multi-split air conditioning system and control method thereof |
| CN202792279U (en) * | 2012-08-21 | 2013-03-13 | 广东美的暖通设备有限公司 | Multiple on-line air-conditioning system |
| CN102914027A (en) * | 2012-09-20 | 2013-02-06 | 宁波奥克斯电气有限公司 | Control method for preventing refrigerant of outdoor unit from bias flowing during refrigeration of multi-split air-conditioning unit |
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