CN104214985B - A kind of multi-connected air conditioning system and cryogenic refrigeration method - Google Patents
A kind of multi-connected air conditioning system and cryogenic refrigeration method Download PDFInfo
- Publication number
- CN104214985B CN104214985B CN201410440839.7A CN201410440839A CN104214985B CN 104214985 B CN104214985 B CN 104214985B CN 201410440839 A CN201410440839 A CN 201410440839A CN 104214985 B CN104214985 B CN 104214985B
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- outfan
- outdoor heat
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention provides a kind of multi-connected air conditioning system, including: a compressor or multiple parallel connection compressor, two separate outdoor heat exchangers, two cross valves, two electric expansion valves and a check valve.The present invention is by replacing an original outdoor heat exchanger by two outdoor heat exchangers, make multiple on-line system when cryogenic refrigeration, by cutting off an outdoor heat exchanger, reach to reduce the purpose of condenser area, realize controlling to maintain in the reasonable scope by system pressure and aerofluxus and suction temperature, thus reduce system and return the risk of liquid refrigerants, it is ensured that the reliability of system；When multiple on-line system heats at high temperature, by cutting off an outdoor heat exchanger, reach to reduce evaporator area, it is achieved control to maintain in the reasonable scope by system pressure and aerofluxus and suction temperature, thus Keep Clear-High Voltage to reduce system high temperature, it is ensured that the reliability of system.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly relate to a kind of multi-connected air conditioning system and cryogenic refrigeration side
Method.
Background technology
The outdoor heat exchanger of existing multi-connected air conditioning system is substantially and is integrally formed stream, and this is whole
Body stream is conducive to production technology and off-premises station to control off-premises station is smaller when, but existing market
It is increasing that the ability of upper separate unit multi-connected machine off-premises station is done, and the biggest has 30, the most greatly
The off-premises station of number, the outdoor heat exchanger of this overall stream is when cryogenic refrigeration, and outdoor heat exchanger is whole
Being used as condenser, condensation effect so may be made very good, vaporizer can not evaporate completely, machine in refrigeration
The most sufficient high frequent start and stop causing off-premises station of ability or cause system to return liquid refrigerants, time serious
Compressor is caused to burn；When high temperature heats, compressor exhaust temperature is high, and at this moment system pressure also can be very
Height, and outdoor heat exchanger is all used as vaporizer, evaporation effect is very good, and heating capacity is the most sufficient causes room
Outer machine high frequent start and stop or cause suction temperature the highest, cause again aerofluxus temperature if suction temperature height
Du Genggao, such vicious cycle compressor that goes down works the most under high pressure, eventually burns compressor；
Current multi-connected machine turns air quantity to both the above state mainly by employing regulation off-premises station blower fan to be come outside conditioning chamber
The heat exchange efficiency of machine heat exchanger, but even if closing off-premises station blower fan at the biggest off-premises station, only
Heat exchanger is utilized not exclusively to make system with evaporating when the heat convection of air still cannot solve cryogenic refrigeration
Return liquid and high temperature makes system pressure too high when heating and causes burning the risk of compressor.
Summary of the invention
A kind of multi-connected air conditioning system, including:
For providing a system to the compressor of coolant, for making the refrigerant evaporation heat absorption or the first of condensation of system
Outdoor heat exchanger and the second outdoor heat exchanger, for making refrigerant evaporation heat absorption or first Room of condensation of system
Interior machine and the second indoor set, be connected with described first indoor set input and described second indoor set input
The high-pressure stop valve connect, is connected with described first indoor set outfan and described second indoor set outfan
Low-pressure shutoff valve, swollen for the first electronics of cold medium flux controlling to flow through described first outdoor heat exchanger
Swollen valve, for control flow through described second outdoor heat exchanger cold medium flux the second electric expansion valve and
First cross valve, the second cross valve, check valve；
The quantity of described compressor is at least one, and described compressor can provide a system to cold-producing medium, and institute
State compressor composition compressor bank, and outfan and the air return end of each described compressor are accumulated compression
The outfan of unit and the air return end of compressor bank；
The input of described first electric expansion valve is connected with the outfan of described first outdoor heat exchanger, institute
The outfan stating the first electric expansion valve is connected with described high-pressure stop valve；
The input of described second electric expansion valve is connected with the outfan of described second outdoor heat exchanger, described
The outfan of the second electric expansion valve is connected with described high-pressure stop valve；
First end of described first cross valve is connected with the outfan of described compressor bank, described first four-way
Second end of valve and the input of described first outdoor heat exchanger, the first end of described second cross valve and institute
The outfan stating check valve connects, and the 3rd end of described first cross valve is connected with described low-pressure shutoff valve,
4th end of described first cross valve is connected with the air return end of described compressor bank, and described first cross valve is used
System is made to enter refrigeration or heat mould in described first outdoor heat exchanger of control and described second outdoor heat exchanger
Formula；
First end of described second cross valve changes with the second end of described first cross valve, described first outdoor
The input of hot device, the outfan of described check valve connect, and the second end of described second cross valve is with described
The input of the input of the second outdoor heat exchanger and described check valve connects, the of described second cross valve
Three ends and the 4th end are connected with the 4th end of described first cross valve and the air return end of described compressor bank；Institute
The coolant of the second outdoor heat exchanger is cut off when stating the second cross valve for controlling refrigeration；
Second end of the input of described check valve and described second cross valve and described second outdoor heat exchanger
Input connect, the outfan of described check valve and the input of described first outdoor heat exchanger, first
Second end of cross valve and the first end of described second cross valve connect, and increase when described check valve is used for heating
Adding system coolant circulates, and reduces system pressure loss.
Preferably, also include dividing for the gas-liquid that the coolant flowing into described compressor bank carries out gas-liquid separation
From device；
4th end of the input of described gas-liquid separator and described first cross valve and described second cross valve
The 3rd end, the 4th end connect, the air return end of the outfan of described gas-liquid separator and described compressor bank
Connect.
Preferably, also include for detecting described gas-liquid separator outfan and described compressor bank air return end
Between pressure size low-pressure sensor and for according to detection pressure size, control described gas-liquid
The low tension switch that between separator outfan and described compressor bank air return end, passage is switched on and off；
Described low tension switch and described low-pressure sensor are arranged on described gas-liquid separator outfan and institute
State between compressor bank air return end.
Preferably, oil eliminator is also included；
The input of described oil eliminator is connected with the outfan of described compressor bank, described oil eliminator
Coolant outfan is connected with the first end of described first cross valve.
Preferably, the oily outfan of described oil eliminator is provided with and is connected with described compressor bank air return end
Capillary tube；
High-pressure gaseous coolant and refrigerator oil that described capillary tube is used for flowing out compressor bank separate,
High-pressure gaseous coolant is made to be discharged by the coolant outfan of described oil eliminator, by isolated refrigerator oil
Flow back to described compressor bank by the capillary tube of described oil eliminator oil outfan, and described capillary tube is used for
Control the oil drain quantity of described oil eliminator.
Preferably, described oil eliminator input or coolant outfan are provided with high-pressure switch and height
Pressure pressure sensor；
Described high-pressure pressure sensor is for detecting the pressure size of the outfan of described compressor bank；Described
High-pressure switch for according to detection pressure size, control described compressor bank outfan unlatching and
Close.
Preferably, also include: branch pipe gentle side, liquid side branch pipe；
The input of described first indoor set is connected with described high-pressure stop valve by described liquid side branch pipe,
The input of the second indoor set is connected with described high-pressure stop valve by described liquid side branch pipe；
The outfan of described first indoor set is connected with described low-pressure shutoff valve by described gas side branch pipe, institute
The outfan stating the second indoor set is connected with described low-pressure shutoff valve by described gas side branch pipe.
Preferably, described compressor uses frequency-changeable compressor, or constant speed compressor, or digital compressor.
Preferably, the model of described first outdoor heat exchanger and described second outdoor heat exchanger is identical or different；
The model of described first electric expansion valve and described second electric expansion valve is identical or different.
A kind of cryogenic refrigeration method of multi-connected air conditioning system, including:
Closing the second outdoor heat exchanger, the first cross valve power down, the second cross valve powers on, and the first electronics is swollen
Swollen valve is opened, and the second electric expansion valve is closed；
The coolant of High Temperature High Pressure that compressor bank is discharged enters the first outdoor heat exchanger condensation, through the after condensation
One electric expansion valve reducing pressure by regulating flow formed liquid refrigerants, liquid refrigerants through high-pressure stop valve by liquid side difference
Pipe is diverted to the first indoor set and the second indoor set；
Liquid refrigerants is evaporation endothermic in the first indoor set and the second indoor set, forms gaseous state after evaporation endothermic
Coolant, gaseous coolant collaborates through gas side branch pipe；
Gaseous coolant behind interflow enters gas-liquid separator through low-pressure shutoff valve and the first cross valve and carries out gas
Liquid separates；
Coolant after gas-liquid separation returns to compressor bank and completes kind of refrigeration cycle.
As can be seen from the above technical solutions, the invention have the advantages that
The present invention is by replacing an original outdoor heat exchanger by two outdoor heat exchangers so that multi-connected machine system
System is when cryogenic refrigeration, by cutting off an outdoor heat exchanger, reaches to reduce the purpose of condenser area,
Realize controlling to maintain in the reasonable scope by system pressure and aerofluxus and suction temperature, thus reduce system
Return the risk of liquid refrigerants, it is ensured that the reliability of system；When multiple on-line system heats at high temperature, logical
Cross one outdoor heat exchanger of cut-out, reach to reduce evaporator area, it is achieved by system pressure and aerofluxus and
Suction temperature controls to maintain in the reasonable scope, thus Keep Clear-High Voltage to reduce system high temperature, it is ensured that system
Reliability.Therefore, a kind of multi-connected air conditioning system that the present invention provides is effectively improved multiple on-line system low
Integrity problem when temperature is freezed, high temperature heats.
Accompanying drawing explanation
In order to be illustrated more clearly that technical scheme, below by describing required use attached
Figure is briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of multi-connected air conditioning system disclosed in the embodiment of the present invention；
The flow chart of the refrigerating method of the multi-connected air conditioning system that Fig. 2 provides for the present invention.
Detailed description of the invention
For making the goal of the invention of the present invention, feature, the advantage can be the most obvious and understandable, below will
Use specific embodiment and accompanying drawing, the technical scheme of present invention protection be clearly and completely described,
Obviously, the embodiments described below are only a part of embodiment of the present invention, and not all embodiment.
Based on the embodiment in this patent, those of ordinary skill in the art are not under making creative work premise
The all other embodiments obtained, broadly fall into the scope of this patent protection.
The embodiment of the invention discloses a kind of multi-connected air conditioning system, see Fig. 1, including:
Specifically include the compressor for providing a system to coolant, for make system refrigerant evaporation heat absorption or
Condensation the first outdoor heat exchanger 2 and the second outdoor heat exchanger 4, for make system refrigerant evaporation heat absorption or
First indoor set 40 and the second indoor set 41 of condensation, with described first indoor set 40 input and described
The high-pressure stop valve 15 that second indoor set 41 input is connected, with described first indoor set 40 outfan
The low-pressure shutoff valve 17 being connected with described second indoor set 41 outfan, flows through described first for control
First electric expansion valve 12 of the cold medium flux of outdoor heat exchanger 2, flows through described second for control outdoor
Second electric expansion valve 13 and first cross valve the 7, second cross valve 8 of the cold medium flux of heat exchanger 4,
Check valve 9；
The quantity of described compressor is at least one, and described compressor can provide a system to cold-producing medium, and
Described compressor composition compressor bank 1, and outfan and the air return end of each described compressor are accumulated pressure
The outfan of contracting unit 1 and the air return end of compressor bank 1；
The input of described first electric expansion valve 12 connects with the outfan of described first outdoor heat exchanger 2
Connecing, the outfan of described first electric expansion valve 12 is connected with described high-pressure stop valve 15；
The input of described second electric expansion valve 4 and the outfan of the second outdoor heat exchanger 13 connect, institute
The outfan stating the second electric expansion valve 4 connects described high-pressure stop valve 15；
First end 7D of described first cross valve 7 is connected with the outfan of described compressor bank 1, and described
Second end 7C of one cross valve 7 and the input of described first outdoor heat exchanger 2, described second cross valve
The first end 8D of 8 and the outfan of described check valve 9 connect, the 3rd end 7E of described first cross valve 7
It is connected with described low-pressure shutoff valve 17, the 4th end 7S of described first cross valve 7 and described compressor bank 1
Air return end connect, described first cross valve 7 is used for controlling described first outdoor heat exchanger 2 and described the
Two outdoor heat exchangers 4 make system enter refrigeration or heating mode；
First end 8D of described second cross valve 8 and the second end 7C of described first cross valve 7, described
The input of the first outdoor heat exchanger 2, the outfan of described check valve 9 connect, described second cross valve 8
The input of the second end 8C and described second outdoor heat exchanger 4 and described check valve 9 input even
Connect, the 3rd end 8E and the 4th end 8S of described second cross valve 8 and the 4th of described first cross valve 7 the
The air return end of end 7S and described compressor bank 1 connects；Described second cross valve 8 is used for controlling to cut during refrigeration
The coolant of disconnected second outdoor heat exchanger 4；
It should be noted that cross valve (the most above-mentioned first cross valve the 7, second cross valve 8) is in power down
When, the first end D and the second end C conducting, the 3rd end E and the 4th end S conducting；
Cross valve is powering on when, and the first end D and the 3rd end E turns on, the second end C and the 4th end S
Conducting.
The input of described check valve 9 and the second end 8C of the second cross valve 8 and the second outdoor heat exchanger 4
Input connect, the outfan of check valve 9 and the input of the first outdoor heat exchanger 2, the first four-way
Second end 7C of valve 7 and the first end 8D of the second cross valve 8 connects；The circulating direction of check valve 9 is
From input to outfan, do not circulate.The circulation of system coolant is increased when check valve 9 is used for heating,
Reduce system pressure loss.
In the present embodiment, two indoor sets: the first indoor set 40, the second indoor set 41, wherein the first Room
The input 40A of interior machine 40 is connected with high-pressure stop valve 15 by liquid side branch pipe 50, the second indoor set
The input 41A of 41 is connected with high-pressure stop valve 15 by liquid side branch pipe 50；First indoor set 40
Outfan 40B be connected with low-pressure shutoff valve 17 by gas side branch pipe 51, the second indoor set 41 defeated
Go out to hold 41B to be connected with low-pressure shutoff valve 17 by gas side branch pipe 51.
In summary it can be seen, the present invention by two outdoor heat exchangers are replaced original outdoor heat exchangers,
Make multiple on-line system when cryogenic refrigeration, by cutting off an outdoor heat exchanger, reach to reduce condenser
The purpose of area, it is achieved control to maintain in the reasonable scope by system pressure and aerofluxus and suction temperature,
Thus reduce system and return the risk of liquid refrigerants, it is ensured that the reliability of system；When multiple on-line system is at height
When temperature heats, by cutting off an outdoor heat exchanger, reach to reduce evaporator area, it is achieved by system pressure
Power and aerofluxus and suction temperature control to maintain in the reasonable scope, thus Keep Clear-High Voltage to reduce system high temperature,
The reliability of guarantee system.Therefore, a kind of multi-connected air conditioning system that the present invention provides is effectively improved multi-joint
The machine system reliability when cryogenic refrigeration, high temperature heat.
It will be appreciated by persons skilled in the art that as ensureing that the first outdoor heat exchanger 2 and the second outdoor change
Hot device 4 has good refrigeration as condenser when using, or has very when using as vaporizer
Good heating effect, therefore, controls to flow through the cold of the first outdoor heat exchanger 2 and the second outdoor heat exchanger 4
Matchmaker's flow is most important.
Therefore, the first outdoor heat exchanger 2 is connected with high-pressure stop valve 15 by the first electric expansion valve 12,
First electric expansion valve 12 is for controlling to flow through the cold medium flux of the first outdoor heat exchanger 2.In like manner, second
Outdoor heat exchanger 4 is connected with high-pressure stop valve 15 by the second electric expansion valve 13, the second electronic expansion
Valve 13 is for controlling to flow through the cold medium flux of the second outdoor heat exchanger 4.
In the present embodiment, also include: gas-liquid separator 14；
The input of gas-liquid separator 14 and the 4th end 7S of the first cross valve 7 and the second cross valve 8
3rd end 8E, the 4th end 8S connect, and the outfan of gas-liquid separator 14 connects the return-air of compressor bank 1
End；Gas-liquid separator 14 is for carrying out gas-liquid separation to the gaseous coolant of the air return end flowing into compressor bank 1.
For optimizing above-described embodiment further, also include: oil eliminator 6；
The entrance point 6A of oil eliminator 6 connects the air return end of compressor bank 1, and the coolant of oil eliminator 6 is defeated
Go out to hold 6B to connect the first end 7D of cross valve 7；The oily outfan 6C of oil eliminator 6 passes through capillary tube
24 air return ends connecting compressor bank 1；
Oil eliminator 6 is used for gaseous coolant and the compressor and freeze machine of the air return end to flowing out compressor bank 1
Oil separates, and high-pressure gaseous coolant is discharged by the coolant outfan 6B of oil eliminator, isolated pressure
Contracting machine refrigerator oil is discharged to have by the oily outfan 6C of oil eliminator and is returned to compressor through capillary tube 24
The air return end of group 1, wherein capillary tube 24 is for controlling the oil drain quantity of oil eliminator.
In the present embodiment, also include: liquid side branch pipe 50 gentle side branch pipe 51；Described first is indoor
The input 40A of machine 40 is connected with described high-pressure stop valve 15 by described liquid side branch pipe 50, and second
The input 41A of indoor set 41 is connected with described high-pressure stop valve 15 by described liquid side branch pipe 50；
The outfan 40B of described first indoor set 40 is cut with described low pressure by described gas side branch pipe 51
Only valve 17 connects, and the outfan 41B of described second indoor set 41 passes through described gas side branch pipe 51 and institute
State low-pressure shutoff valve 17 to connect.
In the present invention, it is provided that the cryogenic refrigeration method of a kind of multi-connected air conditioning system, Fig. 2 is referred to also
Shown in Fig. 1, including:
S1: closing the second outdoor heat exchanger, the first cross valve power down, the second cross valve powers on, the first electricity
Sub-expansion valve is opened, and the second electric expansion valve is closed；
The coolant of the High Temperature High Pressure that S2: compressor bank is discharged enters the first outdoor heat exchanger condensation, after condensation
Through first electric expansion valve reducing pressure by regulating flow formed liquid refrigerants, liquid refrigerants through high-pressure stop valve by liquid side
Branch pipe is diverted to the first indoor set and the second indoor set；
S3: liquid refrigerants is evaporation endothermic in the first indoor set and the second indoor set, is formed after evaporation endothermic
Gaseous coolant, gaseous coolant collaborates through gas side branch pipe；
S4: the gaseous coolant behind interflow enters gas-liquid separator through low-pressure shutoff valve and the first cross valve and enters
Row gas-liquid separation；
S5: the coolant after gas-liquid separation returns to compressor bank and completes kind of refrigeration cycle.
Multi-connected air conditioning system kind of refrigeration cycle controls specific as follows:
Multi-connected air conditioning system is when cryogenic refrigeration, and air-cooled side ambient temperature is low, two outdoor heat exchangers without
Need to all make condenser, at this point it is possible to close an outdoor heat exchanger, the second outdoor heat exchange can be closed
Device 4, the first cross valve 7 power down of multi-connected air conditioning system, the second cross valve 8 powers on, and the first electronics is swollen
Swollen valve 12 is opened under the control of electric-control system, and the second electric expansion valve 13 is closed.Compressor bank 1 row
The coolant of the High Temperature High Pressure gone out all saves through the first electric expansion valve 12 after the first outdoor heat exchanger 2 condensation
Stream blood pressure lowering, coolant liquid refrigerants after the first air cooling heat exchanger 2 reducing pressure by regulating flow is through high-pressure stop valve
Respectively to the first indoor set 40 and the second indoor set 41 devaporation after being shunted by liquid side branch pipe 50 after 15
Heat absorption, becomes gaseous coolant after gas side branch pipe 51 collaborates by low-pressure shutoff valve 17 after evaporation endothermic
After return to gas-liquid separator 14 through the first cross valve 7 again, be eventually returned to compressor bank 1 and complete refrigeration and follow
Ring, reaches the purpose of multiple on-line system refrigeration.Also ensure that the system freezed at low ambient temperatures simultaneously
Reliability.
It should be noted that owing to the second cross valve 8 powers on, the first end 8D and of the second cross valve 8
Three end 8E conducting, compressor bank 1 get rid of High Temperature High Pressure coolant in the second cross valve 8 by capillary tube 24
Block up, flow only through a small amount of coolant and return to gas-liquid separator 14 through capillary tube 24.Owing to the second electronics is swollen
Swollen valve 13 cuts out, and the second end 8C of the second cross valve 8 and the 4th end 8S conducting, the second cross valve 8
Interior coolant empties back into gas-liquid separator 14, say, that do not circulate in the second cross valve 8 coolant.
In the multi-connected air conditioning system that the present invention provides specific as follows in refrigeration and the loop control that heats:
Multi-connected air conditioning system when refrigeration, the first cross valve 7 power down, the second cross valve 8 power down, the
One electric expansion valve 12 and the second electric expansion valve 13 are opened under the control of electric-control system.Compressor bank 1
A coolant part for the High Temperature High Pressure discharged is direct to the first outdoor heat exchanger 2 after the first cross valve 7
Through the first electric expansion valve 12 reducing pressure by regulating flow after condensation, a part after the first cross valve 7 again through the
Through the second electric expansion valve 13 reducing pressure by regulating flow after two cross valve the 8 to the second outdoor heat exchanger 4 condensations, two
Liquid refrigerants after outdoor heat exchanger reducing pressure by regulating flow to after high-pressure stop valve 15 through liquid side branch pipe 50 points
Absorb heat to the first indoor set 40 and the second indoor set 41 devaporation respectively after stream, after evaporation endothermic, become gas
State coolant returns to gas-liquid separator 14 through the first cross valve 7, finally after gas side branch pipe 51 collaborates
Return to compressor bank 1 and complete kind of refrigeration cycle, reach the purpose of multiple on-line system refrigeration.
Multi-connected air conditioning system is when heating, and the first cross valve 7 powers on, the second cross valve 8 power down, the
One electric expansion valve the 12, second electric expansion valve 13 is opened under the control of electric-control system.Compressor bank 1
The coolant of the High Temperature High Pressure discharged after the first cross valve 7 to low-pressure shutoff valve 17 by gas side branch pipe
Condense to the first indoor set 40 and the second indoor set 41 respectively after 51 shuntings, condensed liquid refrigerants warp
Cross liquid side branch pipe 50 to collaborate, a part after the first electric expansion valve 12 reducing pressure by regulating flow to the first Room
Returning to gas-liquid separator 14 through the first cross valve 7 after external heat exchanger 2 evaporation endothermic, a part is through the
To the second outdoor heat exchanger 4 evaporation endothermic rear portion through unidirectional after two electric expansion valve 13 reducing pressure by regulating flows
Valve 9, a part is through the second cross valve 8, then returns to gas-liquid separator 14 through the first cross valve 7,
Return to compressor bank 1 eventually complete to heat circulation, reach the purpose that multiple on-line system heats.
Multi-connected air conditioning system disclosed by the invention improves the tool of the reliability that multiple on-line system heats at high temperature
Body process is as follows:
Multi-connected air conditioning system when high temperature heats, the first indoor set 40 and heat exchange of the second indoor set 41
Condenser made by device, and outdoor heat exchanger makees vaporizer, and air-cooled side ambient temperature is high, and evaporation effect is good, and presses
Contracting unit 1 delivery temperature is high, pressure at expulsion is high, so can reduce evaporator area.Such as by first
Air cooling heat exchanger 2, as vaporizer, closes the second outdoor heat exchanger 4.Control process is as follows: the first four-way
Valve 7 powers on, the second cross valve 8 power down, and the first electric expansion valve 12 is opened under the control of electric-control system,
Second electric expansion valve 13 is closed.The High Temperature High Pressure coolant that compressor bank 1 is discharged is through the first cross valve 7
Arrive afterwards low-pressure shutoff valve 17 again through gas side branch pipe 51 shunt after respectively to the first indoor set 40 and second
Condensation in indoor set 41, condensed coolant arrives high-pressure stop valve after liquid side branch pipe 50 collaborates
15 and first between electric expansion valve 12 and the second electric expansion valve 13, and condensed coolant eventually passes
To the first air cooling heat exchanger 2 evaporation endothermic after first electric expansion valve 12, it is then passed through the first cross valve 7
Return to compressor bank 1 after being eventually returned to gas-liquid separator 14 and complete whole refrigerant circulation.
It should be noted that due to the second cross valve 8 power down, the first end 8D and of the second cross valve 8
Two end 8C conductings, owing to the second electric expansion valve 13 is closed, the coolant in the second cross valve 8 all returns
To gas-liquid separator 14, say, that do not circulate in the second cross valve 8 coolant.
Multiple on-line system, when cryogenic refrigeration, high temperature heat, does not circulate in the second outdoor cold heat exchanger 4 cold
Matchmaker, is also equivalent to decrease outdoor heat exchanger area, reduces condensation effect, it is ensured that system is certain
High-pressure and low pressure, control system return liquid risk, greatly increase the reliable of system
Property.
In summary it can be seen, the present invention by two outdoor heat exchangers are replaced original outdoor heat exchangers,
Make multiple on-line system when cryogenic refrigeration, by cutting off an outdoor heat exchanger, reach to reduce condenser
The purpose of area, it is achieved control to maintain in the reasonable scope by system pressure and aerofluxus and suction temperature,
Thus reduce system and return the risk of liquid refrigerants, it is ensured that the reliability of system；When multiple on-line system is at height
When temperature heats, by cutting off an outdoor heat exchanger, reach to reduce evaporator area, it is achieved by system pressure
Power and aerofluxus and suction temperature control to maintain in the reasonable scope, thus Keep Clear-High Voltage to reduce system high temperature,
The reliability of guarantee system.Therefore, a kind of multi-connected air conditioning system that the present invention provides is effectively improved multi-joint
The machine system reliability when cryogenic refrigeration, high temperature heat.
It will be appreciated by persons skilled in the art that the hypertonia in multiple on-line system or too low all can
Affect the stable operation of multiple on-line system.Therefore, the present invention is reliable and stable for ensureing multi-connected air conditioning system
Operation, in the above-described embodiments:
Also include for detecting between described gas-liquid separator 14 outfan and described compressor bank 1 air return end
The low-pressure sensor 20 of pressure size and for the pressure size according to detection, controls described gas-liquid and divides
The low tension switch 21 being switched on and off from pipeline between device 14 outfan and described compressor bank 1 air return end；
It is defeated that described low tension switch 21 and described low-pressure sensor 20 are arranged on described gas-liquid separator 14
Go out between end and described compressor bank 1 air return end.
Gas pressure between the air return end of gas-liquid separator 14 outfan and compressor bank 1 is less than presetting
During value, low pressure switch 21 disconnects automatically, and sends a pressure signal to electric-control system, thus electric
Ore-controlling Role takes corresponding protective measure according to the pressure signal received, and such as, turns off compressor bank 1.
Multi-connected air conditioning system is automatically controlled can also be by what detection low-pressure sensor 20 in real time was fed back
System low pressure, makes corresponding control or protection, such as detects after participating in the logic control computing of system
To low pressure, adjusted the first electric expansion valve 12 and the second electric expansion valve 13 in real time by logical operations
Aperture size.
Described oil eliminator 6 input 6A or coolant outfan 6B is provided with high-pressure switch 22
With high-pressure pressure sensor 23；
Described high-pressure pressure sensor 23 is for detecting the pressure size of the outfan of described compressor bank 1；
Described high-pressure switch 22, for the pressure size according to detection, controls described compressor bank 1 outfan
Opening and closing.
When the pressure of compressor bank 1 expellant gas looked into preset value, high-pressure switch 22 is from dynamic circuit breaker
Open, and send a pressure signal to electric-control system, thus electric-control system is according to the pressure signal received
Take corresponding protective measure, such as, turn off compressor bank 1.
Certainly multi-connected air conditioning system is automatically controlled can also be fed back by detection high-pressure pressure sensor 23 in real time
System high pressure pressure, make corresponding control or protection, such as after participating in the logic control computing of system
High-pressure detected, adjusted the first electric expansion valve 12 and the second electronic expansion by logical operations in real time
The aperture size of valve 13.
It should be noted is that, in above-described embodiment, the first outdoor heat exchanger 2 and the second outdoor heat exchange
The model of device 4 can be identical, it is also possible to different.Wherein, preferred same model.
The model of the first cross valve 7 and the second cross valve 8 can be identical, it is also possible to different.Do not do
Limit.
In like manner, the first electric expansion valve 12 can be identical with the model of the second electric expansion valve 13, it is possible to
With difference.Wherein, preferred same model.
Described compressor uses frequency-changeable compressor, or constant speed compressor, or digital compressor.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
Term " first " in description and claims of this specification and above-mentioned accompanying drawing, " second ", "
Three " (if present) such as " 4th " is for distinguishing similar object, the most suitable without being used for describing
Sequence or precedence.Should be appreciated that the data of so use can be exchanged in the appropriate case, in order to here
The embodiments of the invention described can be real with the order in addition to those here illustrating or describing
Execute.Additionally, term " includes " and " having " and their any deformation, it is intended that cover non-exclusive
Comprise.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
See, generic principles defined herein can without departing from the spirit or scope of the present invention,
Realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein,
And it is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (9)
1. a multi-connected air conditioning system, it is characterised in that including:
For providing a system to the compressor of coolant, for making the refrigerant evaporation heat absorption or the first of condensation of system
Outdoor heat exchanger and the second outdoor heat exchanger, for making refrigerant evaporation heat absorption or first Room of condensation of system
Interior machine and the second indoor set, be connected with described first indoor set input and described second indoor set input
The high-pressure stop valve connect, is connected with described first indoor set outfan and described second indoor set outfan
Low-pressure shutoff valve, swollen for the first electronics of cold medium flux controlling to flow through described first outdoor heat exchanger
Swollen valve, for control flow through described second outdoor heat exchanger cold medium flux the second electric expansion valve and
First cross valve, the second cross valve, check valve；
The quantity of described compressor is at least one, and described compressor can provide a system to cold-producing medium, and institute
State compressor composition compressor bank, and outfan and the air return end of each described compressor are accumulated compression
The outfan of unit and the air return end of compressor bank；
The input of described first electric expansion valve is connected with the outfan of described first outdoor heat exchanger, institute
The outfan stating the first electric expansion valve is connected with described high-pressure stop valve；
The input of described second electric expansion valve is connected with the outfan of described second outdoor heat exchanger, described
The outfan of the second electric expansion valve is connected with described high-pressure stop valve；
First end of described first cross valve is connected with the outfan of described compressor bank, described first four-way
Second end of valve and the input of described first outdoor heat exchanger, the first end of described second cross valve and institute
The outfan stating check valve connects, and the 3rd end of described first cross valve is connected with described low-pressure shutoff valve,
4th end of described first cross valve is connected with the air return end of described compressor bank, and described first cross valve is used
System is made to enter refrigeration or heat mould in described first outdoor heat exchanger of control and described second outdoor heat exchanger
Formula；
First end of described second cross valve changes with the second end of described first cross valve, described first outdoor
The input of hot device, the outfan of described check valve connect, and the second end of described second cross valve is with described
The input of the input of the second outdoor heat exchanger and described check valve connects, the of described second cross valve
Three ends and the 4th end are connected with the 4th end of described first cross valve and the air return end of described compressor bank；Institute
State the second cross valve when control system is freezed, cut off the coolant of the second outdoor heat exchanger；
Second end of the input of described check valve and described second cross valve and described second outdoor heat exchanger
Input connect, the outfan of described check valve and the input of described first outdoor heat exchanger, first
Second end of cross valve and the first end of described second cross valve connect, and described check valve heats for system
Shi Zengjia system coolant circulates, and reduces system pressure loss；
For the coolant flowing into described compressor bank being carried out the gas-liquid separator of gas-liquid separation；
4th end of the input of described gas-liquid separator and described first cross valve and described second cross valve
The 3rd end, the 4th end connect, the air return end of the outfan of described gas-liquid separator and described compressor bank
Connect；
Multi-connected air conditioning system is when refrigeration, and the first cross valve power down, the second cross valve power down, first is electric
Sub-expansion valve and the second electric expansion valve are opened under the control of electric-control system；The high temperature that compressor bank is discharged is high
A coolant part for pressure after the first cross valve directly to after the first outdoor heat exchanger condensation through the first electronics
Expansion valve reducing pressure by regulating flow, a part is changed to the second outdoor through the second cross valve after the first cross valve again
Liquid after the second electric expansion valve reducing pressure by regulating flow, two outdoor heat exchanger reducing pressure by regulating flows after the condensation of hot device
Coolant to after high-pressure stop valve after liquid side branch pipe shunts respectively to the first indoor set and the second indoor set
Devaporation is absorbed heat, and becomes gaseous coolant after gas side branch pipe collaborates through the first four-way after evaporation endothermic
Valve returns to gas-liquid separator, is eventually returned to compressor bank and completes kind of refrigeration cycle, reaches multiple on-line system refrigeration
Purpose.
Multi-connected air conditioning system the most according to claim 1, it is characterised in that
Also include for detecting pressure between described gas-liquid separator outfan and described compressor bank air return end
The low-pressure sensor of size and for the pressure size according to detection, controls described gas-liquid separator defeated
Go out the low tension switch that between end and described compressor bank air return end, passage is switched on and off；
Described low tension switch and described low-pressure sensor are arranged on described gas-liquid separator outfan and institute
State between compressor bank air return end.
Multi-connected air conditioning system the most according to claim 1, it is characterised in that
Also include oil eliminator；
The input of described oil eliminator is connected with the outfan of described compressor bank, described oil eliminator
Coolant outfan is connected with the first end of described first cross valve.
Multi-connected air conditioning system the most according to claim 3, it is characterised in that
The oily outfan of described oil eliminator is provided with the capillary tube being connected with described compressor bank air return end；
High-pressure gaseous coolant and refrigerator oil that described capillary tube is used for flowing out compressor bank separate,
High-pressure gaseous coolant is made to be discharged by the coolant outfan of described oil eliminator, by isolated refrigerator oil
Flow back to described compressor bank by the capillary tube of described oil eliminator oil outfan, and described capillary tube is used for
Control the oil drain quantity of described oil eliminator.
Multi-connected air conditioning system the most according to claim 3, it is characterised in that
Described oil eliminator input or coolant outfan are provided with high-pressure switch and high-pressure passes
Sensor；
Described high-pressure pressure sensor is for detecting the pressure size of the outfan of described compressor bank；Described
High-pressure switch for according to detection pressure size, control described compressor bank outfan unlatching and
Close.
Multi-connected air conditioning system the most according to claim 1, it is characterised in that
Also include: branch pipe gentle side, liquid side branch pipe；
The input of described first indoor set is connected with described high-pressure stop valve by described liquid side branch pipe,
The input of the second indoor set is connected with described high-pressure stop valve by described liquid side branch pipe；
The outfan of described first indoor set is connected with described low-pressure shutoff valve by described gas side branch pipe, institute
The outfan stating the second indoor set is connected with described low-pressure shutoff valve by described gas side branch pipe.
Multi-connected air conditioning system the most according to claim 1, it is characterised in that
Described compressor uses frequency-changeable compressor, or constant speed compressor, or digital compressor.
Multi-connected air conditioning system the most according to claim 1, it is characterised in that
The model of described first outdoor heat exchanger and described second outdoor heat exchanger is identical or different；
The model of described first electric expansion valve and described second electric expansion valve is identical or different.
9. the cryogenic refrigeration method of a multi-connected air conditioning system, it is characterised in that including:
S1: closing the second outdoor heat exchanger, the first cross valve power down, the second cross valve powers on, the first electricity
Sub-expansion valve is opened, and the second electric expansion valve is closed；
The coolant of the High Temperature High Pressure that S2: compressor bank is discharged enters the first outdoor heat exchanger condensation, after condensation
Through first electric expansion valve reducing pressure by regulating flow formed liquid refrigerants, liquid refrigerants through high-pressure stop valve by liquid side
Branch pipe is diverted to the first indoor set and the second indoor set；
S3: liquid refrigerants is evaporation endothermic in the first indoor set and the second indoor set, is formed after evaporation endothermic
Gaseous coolant, gaseous coolant collaborates through gas side branch pipe；
S4: the gaseous coolant behind interflow enters gas-liquid separator through low-pressure shutoff valve and the first cross valve and enters
Row gas-liquid separation；
S5: the coolant after gas-liquid separation returns to compressor bank and completes kind of refrigeration cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410440839.7A CN104214985B (en) | 2014-09-01 | 2014-09-01 | A kind of multi-connected air conditioning system and cryogenic refrigeration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410440839.7A CN104214985B (en) | 2014-09-01 | 2014-09-01 | A kind of multi-connected air conditioning system and cryogenic refrigeration method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104214985A CN104214985A (en) | 2014-12-17 |
| CN104214985B true CN104214985B (en) | 2016-08-24 |
Family
ID=52096736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410440839.7A Active CN104214985B (en) | 2014-09-01 | 2014-09-01 | A kind of multi-connected air conditioning system and cryogenic refrigeration method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104214985B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987456A (en) * | 2015-02-05 | 2016-10-05 | 佛山市禾才科技服务有限公司 | Multi-connected air conditioning outdoor unit, multi-connected air conditioning system and small load operation control method thereof |
| CN105987429A (en) * | 2015-02-05 | 2016-10-05 | 佛山市禾才科技服务有限公司 | Multi-split air-conditioning system and heating standby quick starting control method thereof |
| CN105890165B (en) * | 2016-05-18 | 2018-11-16 | Tcl空调器(中山)有限公司 | Water-heating machine system and its control method |
| CN111520814B (en) * | 2020-04-13 | 2021-07-13 | 南京天加环境科技有限公司 | Improved multi-split system and control method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5975714B2 (en) * | 2011-11-07 | 2016-08-23 | 三菱電機株式会社 | Refrigeration air conditioner and refrigeration air conditioning system |
| KR101408311B1 (en) * | 2012-05-15 | 2014-06-17 | 하림 엔지니어링(주) | Air-conditioning and Heating System Using Aerobic Fermentation in High Temperature |
| CN203131983U (en) * | 2013-02-05 | 2013-08-14 | 广东美的暖通设备有限公司 | Refrigerating system |
| CN203687235U (en) * | 2013-09-10 | 2014-07-02 | 广东美的暖通设备有限公司 | Air-conditioning outdoor unit, two-pipe refrigerating and heating system and three-pipe heating and recovering system |
| CN203550068U (en) * | 2013-09-30 | 2014-04-16 | 广东志高暖通设备股份有限公司 | Multi-split system, multi-split system outdoor machine and outdoor machine unit of multi-split system outdoor machine |
| CN103776191A (en) * | 2014-02-21 | 2014-05-07 | 广东志高暖通设备股份有限公司 | Multi-split air conditioner and heat pump system thereof |
| CN103851841A (en) * | 2014-03-27 | 2014-06-11 | 广东志高暖通设备股份有限公司 | Control system and control method of parallel-connection four-way valve for multi-line machine |
-
2014
- 2014-09-01 CN CN201410440839.7A patent/CN104214985B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104214985A (en) | 2014-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104197581A (en) | Refrigerating and heating method and system of three-pipe heat recovery multiple-on-line system | |
| CN104154673B (en) | A kind of refrigerating method of Three-pipe heat recovery multi-connected machine system and system | |
| CN205619616U (en) | Multi -split air conditioning system | |
| CN103983044B (en) | A kind of Air-Cooled Heat Pump Unit | |
| CN106288488B (en) | The control method of air-conditioner system and air-conditioner system | |
| CN205619641U (en) | Multi -split air conditioning system | |
| CN107559955B (en) | Multi-line system and its low temperature control method | |
| CN104329824B (en) | Multi-connected air conditioning system and control method thereof | |
| CN104197582B (en) | Multi-connection air conditioning system | |
| CN104197570B (en) | The heating method of a kind of Three-pipe heat recovery multi-connected machine system and system | |
| CN107763774A (en) | Air conditioner cooling cycle system and air conditioner | |
| CN106524557A (en) | Multi-couple unit system and anti-liquid-return control method during defrosting of multi-couple unit system | |
| CN104197499A (en) | Multi-connection air conditioning system | |
| CN205619617U (en) | Multi -split air conditioning system | |
| CN106052181B (en) | Air-conditioning system and its control method | |
| CN104165475A (en) | Multi-split air-conditioning system and heating method | |
| CN104214985B (en) | A kind of multi-connected air conditioning system and cryogenic refrigeration method | |
| CN104197432A (en) | Multi-connection air conditioning system and refrigeration method | |
| CN104197571A (en) | Three-pipe heat recovery multiple-on-line system | |
| CN205619615U (en) | Multi -split air conditioning system | |
| CN106524336A (en) | Multiple-on-line system and liquid return prevention control method thereof | |
| CN203893480U (en) | Air cooling heat pump unit | |
| CN104180559A (en) | Multi-unit system | |
| CN103968594B (en) | A kind of Air-Cooled Heat Pump Unit | |
| CN210801718U (en) | Air conditioner capable of continuously heating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510000 No.1 by helongsha villager group, Shengli village, Lishui Town, Nanhai District, Foshan City, Guangdong Province Patentee after: Guangdong Kaili HVAC Co.,Ltd. Address before: 510000 No.1 by helongsha villager group, Shengli village, Lishui Town, Nanhai District, Foshan City, Guangdong Province Patentee before: GUANGDONG CHIGO HEATING AND VENTILATION EQUIPMENT Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |