CN206973924U - Multiple on-line system - Google Patents
Multiple on-line system Download PDFInfo
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- CN206973924U CN206973924U CN201720791590.3U CN201720791590U CN206973924U CN 206973924 U CN206973924 U CN 206973924U CN 201720791590 U CN201720791590 U CN 201720791590U CN 206973924 U CN206973924 U CN 206973924U
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Abstract
The utility model discloses a kind of multiple on-line system, including outdoor unit, multiple indoor sets, cooling medium distributor and control device, wherein, outdoor unit includes compressor, outdoor heat exchanger and chassis heat-exchanger rig；Cooling medium distributor is used to be allocated the refrigerant for passing in and out multiple indoor sets；Chassis heat-exchanger rig includes chassis heat exchanger, chassis four-way valve and controlled valve；Control device is used to obtain saturation temperature corresponding to the exhaust end high pressure of outdoor environment temperature and compressor, and when saturation temperature control controlled valve is opened according to corresponding to the exhaust end high pressure of outdoor environment temperature and compressor, by the cooling heat transferring of chassis heat exchanger to establish the pressure difference between outdoor unit and multiple indoor sets, the refrigerant of outside is enabled smoothly to be sent to indoor, cryogenic refrigeration is carried out when outdoor environment temperature is relatively low so as to realize, but also does not interfere with the heat recovery function and heating and refrigeration of multiple on-line system.
Description
Technical field
Multi-connected machine technology field is the utility model is related to, more particularly to a kind of multiple on-line system.
Background technology
As shown in figure 1, three control multiple on-line systems in correlation technique may include outdoor heat exchanger (outdoor heat exchanger two
Piece heat exchanger, i.e. First Heat Exchanger and the second heat exchanger), compressor, multiple four-way valves (such as ST1, ST2 and ST3), refrigerant distribution
Device and multiple indoor sets (such as the first indoor set and the second indoor set).
When refrigeration is needed in outdoor low temperature but interior, because interior has particular/special requirement to air quality, multiple on-line system is simultaneously
Extraneous Cryogenic air can not be introduced directly into interior, but need to open machine in refrigeration indoors and freezed, can thus led
Multiple on-line system is caused to there are problems that, for example, when outdoor temperature is less than -5 DEG C, the operation of multiple on-line system can become not
It is stable, and there is degradation in multiple on-line system ability, at this time outdoor environment temperature is relatively low, may result in outdoor heat exchanger
Condensing high pressure do not build up, refrigerant is delivered to indoor pusher side from outdoor pusher side so that effective pressure difference can not be formed, this
Sample would generally cause indoor coolant quantity on the low side, have impact on the refrigeration and heating effect of indoor set.
Utility model content
The utility model is intended to one of technical problem at least solving in above-mentioned technology to a certain extent.
Therefore, the purpose of this utility model is to propose a kind of multiple on-line system, can be when outdoor environment temperature be relatively low
Cryogenic refrigeration is carried out, and does not influence the heat recovery function and heating and refrigeration of multiple on-line system.
To reach above-mentioned purpose, the utility model proposes a kind of multiple on-line system, including outdoor unit, multiple indoor sets,
Cooling medium distributor and control device, wherein, the outdoor unit includes compressor, outdoor heat exchanger and chassis heat-exchanger rig, institute
The exhaust end for stating compressor is connected to one end of the outdoor heat exchanger, and the other end of the outdoor heat exchanger connects the refrigerant
First refrigerant access port of distributor；The cooling medium distributor is used to divide the refrigerant for passing in and out the multiple indoor set
Match somebody with somebody；The chassis heat-exchanger rig includes chassis heat exchanger, chassis four-way valve and controlled valve, and the first end of the chassis heat exchanger connects
The first end of the chassis four-way valve is connected to, the second end of the chassis heat exchanger is connected to the refrigerant by the controlled valve
First refrigerant access port of distributor, the second end of the chassis four-way valve be connected respectively to the compressor air return end and
Second refrigerant access port of the cooling medium distributor, the three-terminal link of the chassis four-way valve to the cooling medium distributor
The 3rd refrigerant access port, the 4th end of the chassis four-way valve is connected to the exhaust end of the compressor；The control device
For obtaining saturation temperature corresponding to the exhaust end high pressure of outdoor environment temperature and the compressor, and according to the outdoor environment
When saturation temperature corresponding to temperature and the exhaust end high pressure of the compressor controls the controlled valve unlatching, changed by the chassis
The cooling heat transferring of hot device is to establish the pressure difference between the outdoor unit and the multiple indoor set, so that the multiple on-line system is entered
Row cryogenic refrigeration.
According to multiple on-line system of the present utility model, include chassis heat exchanger, chassis four-way valve and controlled valve by setting
Chassis heat-exchanger rig, wherein, the first end of chassis heat exchanger is connected to the first end of chassis four-way valve, the of chassis heat exchanger
Two ends are connected to the first refrigerant access port of cooling medium distributor by controlled valve, and the second end of chassis four-way valve is connected respectively to
The air return end of compressor and the second refrigerant access port of cooling medium distributor, the three-terminal link of chassis four-way valve distribute to refrigerant
3rd refrigerant access port of device, the 4th end of chassis four-way valve are connected to the exhaust end of compressor, obtained by control device
Saturation temperature corresponding to the exhaust end high pressure of outdoor environment temperature and compressor, and according to the row of outdoor environment temperature and compressor
Corresponding to the high pressure of gas end saturation temperature control controlled valve open when, by the cooling heat transferring of chassis heat exchanger with establish outdoor unit with
Pressure difference between multiple indoor sets so that the refrigerant of outside can smoothly be sent to indoor, can not only realize in outdoor ring
Cryogenic refrigeration is carried out when border temperature is relatively low, but also does not interfere with the heat recovery function and heating and refrigeration effect of multiple on-line system
Fruit.
In addition, according to the utility model proposes multiple on-line system can also have technical characteristic additional as follows：
Specifically, the outdoor heat exchanger includes First Heat Exchanger and the second heat exchanger, and the first of the First Heat Exchanger
End is connected to the exhaust end of the compressor by the first four-way valve, and the second end of the First Heat Exchanger passes through first throttle valve
The first refrigerant access port is connected to, the first end of second heat exchanger is connected to the compressor by the second four-way valve
Exhaust end, the second end of second heat exchanger is connected to the first refrigerant access port by second throttle, described
Two refrigerant access ports are also respectively connected to first four-way valve and second four-way valve.
Specifically, when the multiple on-line system is run with pure refrigeration mode, if the saturation temperature is more than or equal to the
One temperature threshold, wherein, when the outdoor environment temperature is more than the first preset temperature, the control device control described first
Choke valve and the second throttle keep full-gear, and control the controlled valve to be closed；When the outdoor
When environment temperature is less than or equal to first preset temperature and is more than the second preset temperature, the control device control described first
Choke valve and the second throttle keep the first aperture, and control the controlled valve to be closed；When the outdoor
When environment temperature is less than or equal to second preset temperature, the control device controls the first throttle valve and second section
Stream valve keeps the second aperture, and controls the controlled valve to be in opening, wherein, second aperture is less than described first
Aperture.
Specifically, when the multiple on-line system is run with pure refrigeration mode, if the saturation temperature is less than the first temperature
Threshold value is spent, wherein, when the outdoor environment temperature is more than the first preset temperature, the control device controls the first throttle
Valve and the second throttle keep the first aperture, and control the controlled valve to be closed；When the outdoor environment
When temperature is less than or equal to first preset temperature and is more than the second preset temperature, the control device controls the first throttle
Valve and the second throttle keep the second aperture, and control the controlled valve to be in opening, wherein, described second opens
Degree is less than first aperture；When the outdoor environment temperature is less than or equal to second preset temperature, the control device
Control the first throttle valve and the second throttle to keep the 3rd aperture, and control the controlled valve to be in opening state
State, wherein, the 3rd aperture is less than second aperture.
Specifically, the cooling medium distributor includes multiple heating control valves corresponding with multiple indoor sets and multiple refrigeration
Control valve, one end of each refrigeration control valve are all connected to the second refrigerant access port, the other end of each refrigeration control valve
One end of indoor set corresponding to being connected to, each one end for heating control valve are all connected to the 3rd refrigerant access port, each
The other end of heating control valve is connected to one end of corresponding indoor set, and the other end of each indoor set is all connected to described first
Refrigerant access port.
Specifically, when the multiple on-line system is run with pure refrigeration mode, each refrigeration control valve is in opening state
State, each control valve that heats is in closed mode, if the controlled valve is in opening, the First Heat Exchanger, institute
It is then condenser to state the second heat exchanger and the chassis heat exchanger, wherein, the high temperature discharged from the exhaust end of the compressor
High-pressure gaseous refrigerant is converged after being condensed respectively by the First Heat Exchanger, second heat exchanger and the chassis heat exchanger
Collection is separately dispensed into each indoor set to the first refrigerant access port, and by the cooling medium distributor, by each room
It is changed into medium temperature low-pressure gaseous refrigerant after interior machine evaporation endothermic, and second refrigerant is collected to by each refrigeration control valve and gone out
Enter end, be then return to the compressor.
Specifically, when the multiple on-line system is run with pure heating mode, each refrigeration control valve is in closing shape
State, each control valve that heats are in opening, and the controlled valve is closed, First Heat Exchanger and the second heat exchanger
It is evaporator, wherein, the high pressure gaseous refrigerant discharged from the exhaust end of the compressor enters by chassis four-way valve
The 3rd refrigerant access port, and it is changed into HTHP after being condensed respectively by each heating control valve to each indoor set
Liquid refrigerants, the HTHP liquid refrigerant is pooled to the first refrigerant access port, and passes through the first throttle respectively
It is changed into low-temp low-pressure gas-liquid two-phase refrigerant after valve and second throttle throttling, then passes through the First Heat Exchanger and second
It is changed into cryogenic overheating gaseous coolant after heat exchanger evaporation and returns to the compressor.
Specifically, when the multiple on-line system is run with main refrigeration mode, the multiple indoor set is included in cool room
Machine and heating indoor set, refrigeration control valve corresponding to the refrigeration indoor set are in opening, the heating indoor set pair
The heating control valve answered is in opening, and the controlled valve is closed, the First Heat Exchanger and described second
Heat exchanger is condenser, wherein, the high pressure gaseous refrigerant discharged from the exhaust end of the compressor is divided into two-way, all the way
Respectively the first HTHP liquid refrigerant, first high temperature are condensed into by the First Heat Exchanger and second heat exchanger
High-pressure liquid refrigerant enters the first refrigerant access port；Another way comes in and goes out by chassis four-way valve into the 3rd refrigerant
End, and enter heating indoor set by heating control valve and condensed, to be changed into the second HTHP liquid refrigerant, described second
HTHP liquid refrigerant is after the first refrigerant access port and the first HTHP liquid refrigerant are converged, into cool room
Machine is evaporated, and then enters the second refrigerant access port by refrigeration control valve, and return to by the chassis four-way valve
The compressor.
Specifically, when the multiple on-line system is run with main heating mode, the multiple indoor set is included in cool room
Machine and heating indoor set, refrigeration control valve corresponding to the refrigeration indoor set are in opening, the heating indoor set pair
The heating control valve answered is in opening, and the controlled valve is closed, the First Heat Exchanger and the second heat exchange
Device is evaporator, wherein, the high pressure gaseous refrigerant discharged from the exhaust end of the compressor enters by chassis four-way valve
Enter the 3rd refrigerant access port, and it is cold to be changed into HTHP liquid after being condensed to heating indoor set by heating control valve
Matchmaker, the HTHP liquid refrigerant are divided into two-way after being pooled to the first refrigerant access port, all the way by refrigeration indoor set
It is changed into medium temperature low-pressure gaseous refrigerant after evaporation endothermic, is then collected to by refrigeration control valve after the second refrigerant access port again
The compressor is returned to, another way after the first throttle valve and second throttle throttling respectively by being changed into low-temp low-pressure
Gas-liquid two-phase refrigerant, then returned to by being changed into cryogenic overheating gaseous coolant after the First Heat Exchanger and the evaporation of the second heat exchanger
The compressor.
Brief description of the drawings
Fig. 1 is the system schematic of the multiple on-line system in correlation technique；
Fig. 2 is the block diagram according to the multiple on-line system of the utility model embodiment；
Fig. 3 is the structural representation according to the multiple on-line system of the utility model one embodiment；
Fig. 4 is the refrigerant stream when multiple on-line system is run with pure refrigeration mode according to the utility model one embodiment
Xiang Tu；
Fig. 5 is the refrigerant when multiple on-line system is run with pure refrigeration mode according to another embodiment of the utility model
Flow graph；
Fig. 6 is according to the cold when multiple on-line system is run with pure refrigeration mode of one specific embodiment of the utility model
Matchmaker's flow graph；
Fig. 7 is the refrigerant stream when multiple on-line system is run with pure heating mode according to the utility model one embodiment
Xiang Tu；
Fig. 8 is the refrigerant stream when multiple on-line system is run with main refrigeration mode according to the utility model one embodiment
Xiang Tu；
Fig. 9 is the refrigerant stream when multiple on-line system is run with main heating mode according to the utility model one embodiment
Xiang Tu；And
Figure 10 is the flow chart according to the control method of the multiple on-line system of the utility model embodiment.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
Below in conjunction with the accompanying drawings come describe the utility model embodiment proposition multiple on-line system and its control method.
Fig. 2 is the block diagram according to the multiple on-line system of the utility model embodiment.As shown in Fig. 2 the multi-connected machine
System 1 may include outdoor unit 10, multiple indoor sets 20, cooling medium distributor 30 and control device (not specifically illustrated in figure).
Wherein, outdoor unit 10 may include compressor 11, outdoor heat exchanger 12 and chassis heat-exchanger rig 13, the row of compressor 11
Gas end a11 is connected to one end of outdoor heat exchanger 12, and the other end of outdoor heat exchanger 12 connects the first of cooling medium distributor 30
Refrigerant access port a301.Cooling medium distributor 30 is used to be allocated the refrigerant for passing in and out multiple indoor sets 20.
Also, chassis heat-exchanger rig 13 may include chassis heat exchanger 131, chassis four-way valve 132 and controlled valve SV0, chassis
The first end of heat exchanger 131 is connected to the first end a132 of chassis four-way valve 132, and the second end of chassis heat exchanger 131 is by can
Control valve SV0 is connected to the first refrigerant access port a301 of cooling medium distributor 30, the second end b132 difference of chassis four-way valve 132
The air return end b11 of compressor 11 and the second refrigerant access port a302 of cooling medium distributor 30 are connected to, chassis four-way valve 132
3rd end c132 is connected to the 3rd refrigerant access port a303 of cooling medium distributor 30, the 4th end d132 of chassis four-way valve 132
It is connected to the exhaust end a11 of compressor 11.
And control device is used to obtain saturation corresponding to the exhaust end a11 high pressures of outdoor environment temperature T1 and compressor 11
Temperature Tc, and saturation temperature Tc controls are controllable according to corresponding to the exhaust end a11 high pressures of outdoor environment temperature T1 and compressor 11
When valve SV0 is opened, by the cooling heat transferring of chassis heat exchanger 131 to establish the pressure between outdoor unit 10 and multiple indoor sets 20
Difference, so that multiple on-line system 1 carries out cryogenic refrigeration.Wherein, can be by being disposed in the outdoor the temperature sensor sensing chamber outer shroud of side
Border temperature T1, and the exhaust end a11 of the temperature sensor detection compressor 11 of the exhaust outlet a11 by being arranged on compressor 11 is high
The corresponding saturation temperature Tc of pressure, and by the saturation corresponding to the exhaust end a11 high pressures of outdoor environment temperature T1 and compressor 11
Temperature Tc is sent to the control device of multiple on-line system 1.
That is, control device is satisfied according to corresponding to the exhaust end a11 high pressures of outdoor environment temperature T1 and compressor 11
It is turned on and off with temperature Tc controls controlled valve SV0.When controlled valve SV0 is opened, discharged from the exhaust end a11 of compressor 11
High pressure gaseous refrigerant enters chassis heat exchanger 131 by chassis four-way valve 132, by the cooling heat transferring of chassis heat exchanger 131
After become HTHP gas-liquid two-phase refrigerant.And then high pressure superheater gaseous coolant, high pressure superheater gaseous state are discharged by controlled valve SV0
The refrigerant that refrigerant is condensed after heat release with outdoor heat exchanger 12 is converged to improve the pressure for the refrigerant for flowing into indoor, establishes room
Pressure difference between outside and indoor, so as to which the refrigerant with certain degree of supercooling that outside is discharged successfully is sent to room
Inner side, to realize that multiple on-line system carries out the purpose of cryogenic refrigeration, therefore, it can not only realize when outdoor environment temperature is relatively low
Cryogenic refrigeration is carried out, but also does not interfere with the heat recovery function and heating and refrigeration of multiple on-line system.
It should be noted that controlled valve SV0 can be a small magnetic valve.When controlled valve SV0 is opened, bottom can be passed through
The high pressure gaseous refrigerant cooling heat transferring that disk heat exchanger 131 is discharged to the exhaust end a11 of compressor 11, although being changed into chassis
The cold medium flux of hot device 131 is unlikely to excessive, but can change the big of outdoor heat exchanger by increasing chassis heat exchanger 131
It is small, so as to increased by the cold medium flux summation of heat exchanger, and the pressure difference between outdoor unit and indoor set based on foundation can
A large amount of refrigerants that outside is discharged smoothly are sent to indoor, so as to ensure that multiple on-line system is normally freezed.
In a specific embodiment of the present utility model, as shown in figure 3, multiple indoor sets 20 may include the first indoor set
With the second indoor set, the first indoor set may include the first indoor heat exchanger 21 and the first indoor choke valve 22, and the second indoor set can
Including choke valve 24 in the second indoor heat exchanger 23 and second Room.Wherein, choke valve in the first indoor choke valve 22 and second Room
24 can be electric expansion valve.
According to one embodiment of the present utility model, as shown in figure 3, outdoor heat exchanger 12 may include First Heat Exchanger 121
With the second heat exchanger 122, the first end of First Heat Exchanger 121 is connected to the exhaust end of compressor 11 by the first four-way valve ST1
A11, the second end of First Heat Exchanger 121 are connected to the first refrigerant access port a301, the second heat exchange by first throttle valve EXV1
The first end of device 122 is connected to the exhaust end a11 of compressor 11, the second end of the second heat exchanger 122 by the second four-way valve ST2
First refrigerant access port a301, the second refrigerant access port a302 is connected to by second throttle EXV2 and is also respectively connected to first
Four-way valve ST1 and the second four-way valve ST2.Wherein, first throttle valve EXV1 and second throttle EXV2 can be electric expansion valve.
According to one embodiment of the present utility model, as shown in figure 3, cooling medium distributor 30 may include and multiple indoor sets
Multiple heating control valves (such as SVB1 and SVB2) and multiple refrigeration control valves (such as SVA1 and SVA2) corresponding to 20, each refrigeration control
One end of valve (such as SVA1 and SVA2) processed is all connected to the second refrigerant access port a302, each refrigeration control valve (such as SVA1 and
SVA2 the other end) be connected to corresponding to indoor set one end (other end such as SVA1 be connected to corresponding to the first indoor set
One end, the SVA2 other end are connected to one end of corresponding second indoor set), each heating control valve (such as SVB1 and SVB2)
One end is all connected to the 3rd refrigerant access port a303, and the other end for each heating control valve (such as SVB1 and SVB2) is connected to correspondingly
Indoor set one end (such as SVB1 other end be connected to corresponding to the first indoor set one end, the SVB2 other end is connected to
One end of corresponding second indoor set), the other end of each indoor set is all connected to the first refrigerant access port a301.Wherein,
SVA1, SVA2, SVB1 and SVB2 can be magnetic valve.
According to one embodiment of the present utility model, when multiple on-line system 1 is run with pure refrigeration mode, if passing through control
Device processed judges that saturation temperature Tc is more than or equal to the first temperature threshold T11, then continues through control device and judge outdoor environment
Relation between temperature T and the first preset temperature T1 and the second preset temperature T2, to control first throttle valve EXV1 and second to save
Flow valve EXV2 aperture and controlled valve SV0 state.Wherein, the first temperature threshold T11, the first preset temperature T1 and second are default
Temperature T2 can be set according to actual conditions, for example, the first temperature threshold T11 can be set as to 30 DEG C, the first default temperature
Degree T1 is set as -5 DEG C, and the second preset temperature T2 is set as -15 DEG C.
Specifically, when outdoor environment temperature T is more than the first preset temperature T1, control device control first throttle valve EXV1
Full-gear is kept with second throttle EXV2, and controls controlled valve SV0 to be closed.When outdoor environment temperature T is small
In equal to the first preset temperature T1 and when being more than the second preset temperature T2, the control device sections of control first throttle valve EXV1 and second
Stream valve EXV2 keeps the first aperture, and controls controlled valve SV0 to be closed.When outdoor environment temperature T is less than or equal to the
During two preset temperature T2, control device control first throttle valve EXV1 and second throttle EXV2 keeps the second aperture, and controls
Controlled valve SV0 processed is in opening.Wherein, the second aperture is less than the first aperture.First aperture and the second aperture can be according to realities
Border situation is set, for example, the first aperture can be set to 75%, the second aperture is set to 50%.
According to one embodiment of the present utility model, when multiple on-line system 1 is run with pure refrigeration mode, if passing through control
Device processed judges that saturation temperature Tc is less than the first temperature threshold T11, then continues through control device and judge outdoor environment temperature T
With the relation between the first preset temperature T1 and the second preset temperature T2, to control first throttle valve EXV1 and second throttle
EXV2 aperture and controlled valve SV0 state.
Specifically, when outdoor environment temperature T is more than the first preset temperature T1, control device control first throttle valve EXV1
The first aperture is kept with second throttle EXV2, and controls controlled valve SV0 to be closed.When outdoor environment temperature T is small
In equal to the first preset temperature T1 and when being more than the second preset temperature T2, the control device sections of control first throttle valve EXV1 and second
Stream valve EXV2 keeps the second aperture, and controls controlled valve SV0 to be in opening.When outdoor environment temperature T is less than or equal to the
During two preset temperature T2, control device control first throttle valve EXV1 and second throttle EXV2 keeps the 3rd aperture, and controls
Controlled valve SV0 processed is in opening.Wherein, the 3rd aperture is less than the second aperture, and the 3rd aperture can be carried out according to actual conditions
Setting, for example, the 3rd aperture can be set as into 25%.
Based on the above, when multiple on-line system 1 is run with pure refrigeration mode, saturation temperature is judged by control device
Relation, outdoor environment temperature T and the first preset temperature T1 and the second preset temperature T2 between Tc and the first temperature threshold T11 it
Between relation, to control the state of first throttle valve EXV1 and second throttle EXV2 aperture and controlled valve SV0, list table 1,
It is as shown in table 1 below.
Table 1
Refrigerant when multiple on-line system 1 is run in different modalities is illustrated with reference to Fig. 4-9 to flow to.
When multiple on-line system 1 is run with pure refrigeration mode, each refrigeration control valve (such as SVA1 and SVA2) is in out
State is opened, control valve (such as SVB1 and SVB2) is each heated and is in closed mode.Saturation temperature Tc is judged by control device
With the relation between the first temperature threshold T11, outdoor environment temperature T and the first preset temperature T1 and the second preset temperature T2, and
First throttle valve EXV1 and second throttle EXV2 aperture and controlled valve SV0 state is controlled with reference to table 1.
As shown in figure 4, when controlled valve SV0 is closed, the heat exchanger 122 of First Heat Exchanger 121 and second is
Condenser.The high pressure gaseous refrigerant discharged from the exhaust end a11 of compressor 11 passes through First Heat Exchanger 121 and second respectively
Heat exchanger 122 is collected to the first refrigerant access port a301 after being condensed, and is separately dispensed into often by cooling medium distributor 30
Individual indoor set (such as the first indoor set and the second indoor set), it is cold after each indoor set evaporation endothermic to be changed into medium temperature low-pressure gaseous
Matchmaker, and the second refrigerant access port a302 is collected to by each refrigeration control valve (such as SVA1 and SVA2), it is then return to compression
Machine 11.
Specifically, when multiple on-line system 1 is run with pure refrigeration mode, the first four-way valve ST1 and the second four-way valve ST2 are equal
In not power-up state, the first four-way valve ST1 first port a1 and the 4th port d1 are connected, and the of the second four-way valve ST2
Single port a2 and the 4th port d2 are connected.The exhaust of compressor 11 can be made by the first four-way valve ST1 and the second four-way valve ST2
End a11 is directly connected with the heat exchanger 122 of First Heat Exchanger 121 and second.
Specifically, when multiple on-line system 1 is run with pure refrigeration mode and controlled valve SV0 is closed, from pressure
The high pressure gaseous refrigerant of the exhaust end a11 discharges of contracting machine 11 can be divided into two-way.
The first via enters First Heat Exchanger 121 by the first four-way valve ST1, by First Heat Exchanger 121 condense heat release into
For HTHP liquid refrigerant, enter the first refrigerant access port a301 after then being throttled by first throttle valve EXV1.
Second tunnel enters the second heat exchanger 122 by the second four-way valve ST2, by the second heat exchanger 122 condense heat release into
For HTHP liquid refrigerant, enter the first refrigerant access port a301 after then being throttled by second throttle EXV2.
Understand, above-mentioned two-way refrigerant enters high-pressure liquid tube jointly, and it is cold into first to accumulate degree of supercooling highly pressurised liquid refrigerant
Matchmaker access port a301, and enter the first indoor set and the second indoor set.Then the first indoor choke valve 22 and second is passed through respectively
Indoor choke valve 24 turns into low-pressure liquid refrigerant after being throttled, and respectively enters and changed in the first indoor heat exchanger 21 and second Room
Hot device 23.Being evaporated heat absorption by the first indoor heat exchanger 21 and the second indoor heat exchanger 23 turns into low-pressure gaseous refrigerant, and
Respectively by being collected to the second refrigerant access port a302 after refrigeration control valve SVA1 and SVA2.Finally, come in and gone out by the second refrigerant
End a302 enters compressor 11.
As shown in figure 5, and when controlled valve SV0 is in opening, First Heat Exchanger 121, the second heat exchanger 122 and bottom
Disk heat exchanger 131 is condenser.Wherein, lead to respectively from the exhaust end a11 of the compressor 11 high pressure gaseous refrigerants discharged
Cross after First Heat Exchanger 121, the second heat exchanger 122 and chassis heat exchanger 131 are condensed and be collected to the first refrigerant access port
A301, and each indoor set (such as the first indoor set and the second indoor set) is separately dispensed into by cooling medium distributor 30, pass through
It is changed into medium temperature low-pressure gaseous refrigerant after each indoor set evaporation endothermic, and passes through each refrigeration control valve (such as SVA1 and SVA2)
The second refrigerant access port a302 is collected to, is then return to compressor 11.
Specifically, when multiple on-line system 1 is run with pure refrigeration mode, the first four-way valve ST1, the second four-way valve ST2 and
Chassis four-way valve 132 is in not power-up state, and the first four-way valve ST1 first port a1 and the 4th port d1 are connected, the
Two four-way valve ST2 first port a2 and the 4th port d2 is connected, the first port a132 of chassis four-way valve 132 and the 4th end
Mouth d132 is connected.The exhaust of compressor 11 can be made by the first four-way valve ST1, the second four-way valve ST2 and chassis four-way valve 132
End a11 is directly connected with First Heat Exchanger 121, the second heat exchanger 122 and chassis heat exchanger 131.
Specifically, when multiple on-line system 1 is run with pure refrigeration mode and controlled valve SV0 is in opening, from pressure
The high pressure gaseous refrigerant of the exhaust end a11 discharges of contracting machine 11 can be divided into three tunnels.
The first via enters First Heat Exchanger 121 by the first four-way valve ST1, by First Heat Exchanger 121 condense heat release into
For HTHP liquid refrigerant, enter the first refrigerant access port a301 after then being throttled by first throttle valve EXV1.
Second tunnel enters the second heat exchanger 122 by the second four-way valve ST2, by the second heat exchanger 122 condense heat release into
For HTHP liquid refrigerant, enter the first refrigerant access port a301 after then being throttled by second throttle EXV2.
3rd tunnel enters chassis heat exchanger 131 by chassis four-way valve 132, after chassis heat exchanger 131 condenses heat release
As HTHP gas-liquid two-phase refrigerant, then by entering the first refrigerant after controlled valve SV0 as high pressure superheater gaseous coolant
Access port a301.
Understand, above-mentioned three road refrigerant enters high-pressure liquid tube jointly, accumulates the highly pressurised liquid refrigerant with certain degree of supercooling
Into the first indoor set and the second indoor set.Then carried out respectively by choke valve 24 in the first indoor choke valve 22 and second Room
Turn into low-pressure liquid refrigerant after throttling, and respectively enter the first indoor heat exchanger 21 and the second indoor heat exchanger 23.Pass through first
The indoor heat exchanger 23 of indoor heat exchanger 21 and second, which is evaporated heat absorption, turns into low-pressure gaseous refrigerant, and passes through refrigeration control respectively
The second refrigerant access port a302 is collected to after valve SVA1 and SVA2.Finally, compressor is entered by the second refrigerant access port a302
11.So as to which the refrigerant after chassis heat-exchanger rig cools down heat release can condense the refrigerant after heat release with outdoor heat exchanger and carry out
Converge to improve the pressure for the refrigerant for flowing into indoor, the pressure difference established between outside and indoor, so as to can not only keep away
Exempt from compressor and liquid hammer occurs, but also the pressure difference between outdoor unit that can be based on foundation and multiple indoor sets discharges outside
Refrigerant be smoothly sent to indoor, come realize multiple on-line system carry out cryogenic refrigeration purpose, therefore, can not only realize in room
Cryogenic refrigeration is carried out when external environment temperature is relatively low, but also does not interfere with the heat recovery function and heating and system of multiple on-line system
Cold effect.
In a specific embodiment of the present utility model, when outdoor environment temperature T is -20 DEG C, and saturation temperature Tc is
During more than or equal to 30 DEG C, control device except according to table 1 to first throttle valve EXV1, second throttle EXV2 and controlled valve SV0
It is controlled outside (such as first throttle valve EXV1 and second throttle EXV2 aperture is that 50%, controlled valve SV0 is opened), also
There can be other control modes as controlled first throttle valve EXV1 to close, second throttle EXV2 aperture is 100%, controlled valve
SV0 is opened, so by refrigerant caused by the second heat exchanger 122 and chassis heat exchanger 131 it is also possible that multiple on-line system
Complete normal refrigeration.
As shown in fig. 6, when controlled valve SV0 is in opening, the second heat exchanger 122 and chassis heat exchanger 131 are
Condenser.Wherein, the second heat exchanger 122 is passed through respectively from the exhaust end a11 of the compressor 11 high pressure gaseous refrigerants discharged
The first refrigerant access port a301 is collected to after being condensed with chassis heat exchanger 131, and is divided respectively by cooling medium distributor 30
Indoor set (such as the first indoor set and the second indoor set) is fitted on, is changed into medium temperature low-pressure gaseous after each indoor set evaporation endothermic
Refrigerant, and the second refrigerant access port a302 is collected to by each refrigeration control valve (such as SVA1 and SVA2), it is then return to pressure
Contracting machine 11, so that multiple on-line system completes normal refrigeration.
According to the multiple on-line system of the utility model embodiment, by set include chassis heat exchanger, chassis four-way valve and
The chassis heat-exchanger rig of controlled valve, wherein, the first end of chassis heat exchanger is connected to the first end of chassis four-way valve, chassis heat exchange
Second end of device is connected to the first refrigerant access port of cooling medium distributor, the second end difference of chassis four-way valve by controlled valve
It is connected to the air return end of compressor and the second refrigerant access port of cooling medium distributor, the three-terminal link of chassis four-way valve is to cold
3rd refrigerant access port of matchmaker's distributor, the 4th end of chassis four-way valve are connected to the exhaust end of compressor, are filled by controlling
Put and obtain saturation temperature corresponding to the exhaust end high pressure of outdoor environment temperature and compressor, and according to outdoor environment temperature and compression
When saturation temperature control controlled valve is opened corresponding to the exhaust end high pressure of machine, by the cooling heat transferring of chassis heat exchanger to establish room
Pressure difference between outer machine and multiple indoor sets so that the refrigerant of outside can smoothly be sent to indoor, can not only realize
Cryogenic refrigeration is carried out when outdoor environment temperature is relatively low, but also do not interfere with multiple on-line system heat recovery function and heating and
Refrigeration.
As shown in fig. 7, when multiple on-line system 1 is run with pure heating mode, each refrigeration control valve (such as SVA1 and
SVA2 closed mode) is in, control valve (such as SVB1 and SVB2) is each heated and is in opening, controlled valve SV0 is in
Closed mode, the heat exchanger 122 of First Heat Exchanger 121 and second is evaporator.Wherein, arranged from the exhaust end a11 of compressor 11
The high pressure gaseous refrigerant gone out enters the 3rd refrigerant access port a303 by chassis four-way valve 132, and passes through each system respectively
Heat control valve (HCV) (such as SVB1 and SVB2) is changed into HTHP liquid refrigerant, HTHP liquid after being condensed to each indoor set
Refrigerant is pooled to the first refrigerant access port a301, and respectively by becoming after first throttle valve EXV1 and second throttle EXV2 throttlings
For low-temp low-pressure gas-liquid two-phase refrigerant, it is changed into cryogenic overheating after then being evaporated by the heat exchanger 122 of First Heat Exchanger 121 and second
Gaseous coolant returns to compressor 11.
Specifically, when the equal heating operation of each indoor set in multiple on-line system 1, each refrigeration control valve (such as SVA1
And SVA2) closed mode is in, each heat control valve (such as SVB1 and SVB2) and be in opening, at controlled valve SV0
In closed mode, the heat exchanger 122 of First Heat Exchanger 121 and second is evaporator, is changed in the first indoor heat exchanger 21, second Room
Hot device 23 is condenser, and chassis heat exchanger 131 does not work, i.e., multiple on-line system 1 is run with pure heating mode.
When multiple on-line system 1 is run with pure heating mode, the first four-way valve ST1, the second four-way valve ST2 and chassis four-way
Valve 132 is in power-up state, and the first four-way valve ST1 first port a1 is connected with second port b1, the second four-way valve ST2
First port a2 be connected with second port b2, the 3rd port c132 of chassis four-way valve 132 and the 4th port d132 are connected
It is logical.The exhaust end a11 of compressor 11 can be made by return-air four-way valve 42 directly with being changed in the first indoor heat exchanger 21 and second Room
Hot device 23 is connected.
Specifically, when multiple on-line system 1 is run with pure heating mode, discharged from the exhaust end a11 of compressor 11
High pressure gaseous refrigerant can be divided into two-way.
The first via enters the first indoor heat exchanger 21 by chassis four-way valve 132 and heating control valve SVB1, by first
Indoor heat exchanger 21, which condenses heat release, turns into HTHP liquid refrigerant, into the after then being throttled by the first indoor choke valve 22
One refrigerant access port a301.
Second tunnel flows to choke valve 24 in second Room by chassis four-way valve 132 and heating control valve SVB2, by second
Indoor heat exchanger 23, which condenses heat release, turns into HTHP liquid refrigerant, into the after then being throttled by choke valve in second Room 24
One refrigerant access port a301.
Understand, above-mentioned two-way refrigerant enters high-pressure liquid tube jointly, is pooled to the first refrigerant access port a301.Then lead to respectively
It is changed into low-temp low-pressure gas-liquid two-phase refrigerant after crossing first throttle valve EXV1 and second throttle EXV2 throttlings.Changed finally by first
It is changed into cryogenic overheating gaseous coolant after the hot evaporation endothermic of 121 and second heat exchanger of device 122, by the first four-way valve ST1 and second
Four-way valve ST2 returns to compressor 11.Therefore, when multiple on-line system is run with pure heating mode, multiple on-line system can be ensured
Heating effect.
It should be noted that when multiple on-line system 1 is with pure heating mode, First Heat Exchanger 121 in outdoor unit 10,
Two heat exchangers 122 and chassis heat exchanger 131 are likely to occur the phenomenon of frosting.
When under operating mode of the multiple on-line system 1 in the frosting of 121 and second heat exchanger of First Heat Exchanger 122 with pure heating mode transport
During row, because the frosting of the heat exchanger 122 of First Heat Exchanger 121 and second increases the heat transfer resistance between surface and air, increase
Flow resistance so that reduced by the air mass flow of First Heat Exchanger 121 and second heat exchanger 122, heat exchange efficiency substantially drops
It is low, cause the heat exchange amount between outdoor environment and refrigerant to decline, leaving air temp decay.
Particularly when multiple on-line system 1 is run under the operating mode of some low temperature and high humidities with pure heating mode, due to
The frosting of one heat exchanger 121 and the second heat exchanger 122 is more serious, and refrigerant is in the heat exchanger 122 of First Heat Exchanger 121 and second
Evaporation effect be gradually deteriorated, the operating condition of multiple on-line system 1 deteriorate, cause multiple on-line system 1 to return liquid when serious.
Therefore, when multiple on-line system 1 is run with pure heating mode, by opening defrosting mode can remove and first change
The frost tied on the hot heat exchanger 122 of device 121 and second, the refrigerant flow under defrosting mode can be such as the refrigerant stream under pure refrigeration mode
Road., can be simultaneously to first when multiple on-line system 1 is run in defrost mode in a specific embodiment of the present utility model
The heat exchanger 122 of heat exchanger 121 and second is defrosted, and also the heat exchanger 122 of First Heat Exchanger 121 and second can be removed respectively
Frost.In order to prevent the white Water Damage chassis heat exchanger 131 melted, when opening defrosting mode, it is necessary to always to chassis heat exchanger
131 are defrosted.
As shown in figure 8, when the refrigeration of multiple on-line system 1 need to can need more than heating, and be run with main refrigeration mode, it is more
Individual indoor set 20 includes refrigeration indoor set such as the second indoor set and heating indoor set such as the first indoor set, freezes corresponding to indoor set
Refrigeration control valve such as SVA2 is in opening, and heating control valve such as SVB1 is in opening state corresponding to heating indoor set
State, controlled valve SV0 are closed.
When multiple on-line system 1 is run with main refrigeration mode, the first four-way valve ST1 is in not power-up state, the first four-way
Valve ST1 first port a1 is connected with second port d1, and the second four-way valve ST2 is in not power-up state, the second four-way valve ST2
First port a2 and the 4th port d2 be connected, chassis four-way valve 132 is in power-up state, the 3rd of chassis four-way valve 132 the
Port c132 and the 4th port d132 are connected.
When multiple on-line system 1 is run with main refrigeration mode, chassis heat exchanger 131 does not work, First Heat Exchanger 121 and
Two heat exchangers 122 can be condenser.The high pressure gaseous refrigerant discharged from the exhaust end a11 of compressor 11 can be divided into two
Road.
The first HTHP liquid refrigerant is condensed into by the heat exchanger 122 of First Heat Exchanger 121 and second respectively all the way, the
One HTHP liquid refrigerant enters the first refrigerant access port a301.
Another way enters the 3rd refrigerant access port a303 by chassis four-way valve 132, and is entered by heating control valve SVB1
Enter to heat indoor set such as the first indoor set and carry out condensation heat release, to be changed into the second HTHP liquid refrigerant, the second HTHP
Liquid refrigerants is steamed after the first refrigerant access port a301 and the first HTHP liquid refrigerant converge into refrigeration indoor set
Hair heat absorption, then enters the second refrigerant access port a302, and return to compressor by chassis four-way valve 132 by refrigeration control valve
11。
Therefore, when multiple on-line system is run with main refrigeration mode, the heat absorbed from heating indoor set can be used in
Freeze in indoor set, to complete the heat recovery function of multiple on-line system, and ensure the heating effect of multiple on-line system.
As shown in figure 9, when the heating of multiple on-line system 1 need to can need more than refrigeration, and be run with main heating mode, it is more
Individual indoor set 20 may include to freeze indoor set such as the second indoor set and heat indoor set such as the first indoor set, and freeze indoor set such as the
Refrigeration control valve such as SVA2 corresponding to two indoor sets is in opening, and heating indoor set heats as corresponding to the first indoor set
Control valve such as SVB1 is in opening, and controlled valve SV0 is closed.
When multiple on-line system 1 is run with main heating mode, the first four-way valve ST1, the second four-way valve ST2 and return-air four-way
Valve 42 is in power-up state, and the first four-way valve ST1 first port a1 is connected with second port b1, the second four-way valve ST2
First port a2 be connected with second port b2, the 3rd port c132 of chassis four-way valve 132 and the 4th port d132 are connected
It is logical.
When multiple on-line system 1 is run with main heating mode, the heat exchanger 122 of First Heat Exchanger 121 and second can be to steam
Device is sent out, chassis heat exchanger 131 does not work.The high pressure gaseous refrigerant discharged from the exhaust end a11 of compressor 11 is by chassis
Four-way valve 132 enters the 3rd refrigerant access port a303, and by heating control valve SVB1 to heating indoor set such as the first indoor set
It is changed into HTHP liquid refrigerant after being condensed, HTHP liquid refrigerant is divided into after being pooled to the first refrigerant access port a301
Two-way.
It is changed into medium temperature low-pressure gaseous refrigerant after refrigeration indoor set such as the second indoor set evaporation endothermic all the way, then passes through
After refrigeration control valve SVA2 is collected to the second refrigerant access port a302, compressor 11 is eventually passed back to.
Another way after first throttle valve EXV1 and second throttle EXV2 throttlings respectively by being changed into low-temp low-pressure gas-liquid two
Phase refrigerant, it is changed into cryogenic overheating gaseous coolant after then being evaporated by the heat exchanger 122 of First Heat Exchanger 121 and second and returns to compression
Machine 11.
Therefore, when multiple on-line system is run with main heating mode, the cold absorbed from heating indoor set can be used in
In refrigeration indoor set, to complete the heat recovery function of multiple on-line system, additionally it is possible to which unnecessary HTHP liquid refrigerant is passed through
After first throttle valve and second throttle are evaporated heat absorption in throttling into First Heat Exchanger and the second heat exchanger, it is changed into low temperature
Overheat gaseous coolant returns to compressor.
Based on above-described embodiment, the utility model also proposed a kind of control method of multiple on-line system.
Figure 10 is the flow chart according to the control method of the multiple on-line system of the utility model embodiment.
In embodiment of the present utility model, outdoor heat exchanger includes First Heat Exchanger and the second heat exchanger, the first heat exchange
The first end of device is connected to the exhaust end of compressor by the first four-way valve, and the second end of First Heat Exchanger passes through first throttle valve
The first refrigerant access port is connected to, the first end of the second heat exchanger is connected to the exhaust end of compressor by the second four-way valve, the
Second end of two heat exchangers is connected to the first refrigerant access port by second throttle, and the second refrigerant access port is also respectively connected to
First four-way valve and the second four-way valve.It is specific already described above, repeat no more here.
As shown in Figure 10, the control method of the multiple on-line system of the utility model embodiment may include following steps：
S1, outdoor environment temperature T is obtained, and obtain saturation temperature Tc corresponding to the exhaust end high pressure of compressor.
S2, saturation temperature Tc controls controlled valve to open according to corresponding to the exhaust end high pressure of outdoor environment temperature T and compressor
Qi Shi, by the cooling heat transferring of chassis heat exchanger to establish the pressure difference between outdoor unit and multiple indoor sets, so that multi-connected machine system
System carries out cryogenic refrigeration.
According to one embodiment of the present utility model, when multiple on-line system is run with pure refrigeration mode, if saturation temperature
Degree Tc is more than or equal to the first temperature threshold T11, when outdoor environment temperature T is more than the first preset temperature T1, controls first throttle
Valve and second throttle keep full-gear, and control controlled valve to be closed；When outdoor environment temperature T is less than or equal to
First preset temperature T1 and when being more than the second preset temperature T2, controls first throttle valve and second throttle to keep first to open
Degree, and control controlled valve to be closed；When outdoor environment temperature T is less than or equal to the second preset temperature T2, control first
Choke valve and second throttle keep the second aperture, and control controlled valve to be in opening, wherein, the second aperture is less than the
One aperture.
According to one embodiment of the present utility model, if saturation temperature Tc is less than the first temperature threshold T11, wherein, when
When outdoor environment temperature T is more than the first preset temperature T1, first throttle valve and second throttle is controlled to keep the first aperture, and
Control controlled valve is closed；When outdoor environment temperature T is less than or equal to the first preset temperature T1 and more than the second default temperature
When spending T2, control first throttle valve and second throttle to keep the second aperture, and control controlled valve to be in opening, its
In, the second aperture is less than the first aperture；When outdoor environment temperature T is less than or equal to the second preset temperature T2, first throttle is controlled
Valve and second throttle keep the 3rd aperture, and control controlled valve to be in opening, wherein, the 3rd aperture is opened less than second
Degree.
It should be noted that the details not disclosed in the control method of the multiple on-line system of the utility model embodiment,
The details disclosed in the multiple on-line system of the utility model embodiment is refer to, specific I will not elaborate.
According to the control method of the multiple on-line system of the utility model embodiment, by above-mentioned including chassis heat-exchanger rig
Multiple on-line system, the cooling heat transferring of chassis heat exchanger can be realized, so in the exhaust according to outdoor environment temperature and compressor
Hold high pressure corresponding to saturation temperature control controlled valve open when, by the cooling heat transferring of chassis heat exchanger with establish outdoor unit with it is more
Pressure difference between individual indoor set so that the refrigerant of outside can smoothly be sent to indoor, can not only realize multiple on-line system
Cryogenic refrigeration is carried out when outdoor environment temperature is relatively low, but also does not interfere with heat recovery function and the heating of multiple on-line system
And refrigeration.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " suitable
The orientation or position relationship of the instruction such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on orientation shown in the drawings
Or position relationship, be for only for ease of description the utility model and simplify and describe, rather than instruction or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limit of the present utility model
System.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, such as two
It is individual, three etc., unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be
Mechanically connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be two
The connection of element internal or the interaction relationship of two elements, limited unless otherwise clear and definite.For the common skill of this area
For art personnel, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature
Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special
Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff the different embodiments or example and the feature of different embodiments or example described in this specification can be entered
Row combines and combination.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (9)
- A kind of 1. multiple on-line system, it is characterised in that including outdoor unit, multiple indoor sets, cooling medium distributor and control device, Wherein,The outdoor unit includes compressor, outdoor heat exchanger and chassis heat-exchanger rig, and the exhaust end of the compressor is connected to institute One end of outdoor heat exchanger is stated, the other end of the outdoor heat exchanger connects the first refrigerant discrepancy of the cooling medium distributor End；The cooling medium distributor is used to be allocated the refrigerant for passing in and out the multiple indoor set；The chassis heat-exchanger rig includes chassis heat exchanger, chassis four-way valve and controlled valve, the first end of the chassis heat exchanger It is connected to the first end of the chassis four-way valve, the second end of the chassis heat exchanger is connected to described cold by the controlled valve First refrigerant access port of matchmaker's distributor, the second end of the chassis four-way valve are connected respectively to the air return end of the compressor With the second refrigerant access port of the cooling medium distributor, the three-terminal link of the chassis four-way valve distributes to the refrigerant to be filled The 3rd refrigerant access port put, the 4th end of the chassis four-way valve are connected to the exhaust end of the compressor；The control device is used to obtain saturation temperature corresponding to the exhaust end high pressure of outdoor environment temperature and the compressor, and Saturation temperature controls the controlled valve to open according to corresponding to the exhaust end high pressure of the outdoor environment temperature and the compressor When, by the cooling heat transferring of the chassis heat exchanger to establish the pressure difference between the outdoor unit and the multiple indoor set, with The multiple on-line system is set to carry out cryogenic refrigeration.
- 2. multiple on-line system as claimed in claim 1, it is characterised in that the outdoor heat exchanger includes First Heat Exchanger and the Two heat exchangers, the first end of the First Heat Exchanger are connected to the exhaust end of the compressor by the first four-way valve, and described Second end of one heat exchanger is connected to the first refrigerant access port, the first end of second heat exchanger by first throttle valve The exhaust end of the compressor is connected to by the second four-way valve, the second end of second heat exchanger is connected by second throttle The first refrigerant access port is connected to, the second refrigerant access port is also respectively connected to first four-way valve and described second Four-way valve.
- 3. multiple on-line system as claimed in claim 2, it is characterised in that when the multiple on-line system is run with pure refrigeration mode When, if the saturation temperature is more than or equal to the first temperature threshold, wherein,When the outdoor environment temperature is more than the first preset temperature, the control device controls the first throttle valve and described Second throttle keeps full-gear, and controls the controlled valve to be closed；When the outdoor environment temperature is less than or equal to first preset temperature and is more than the second preset temperature, the control dress Put and control the first throttle valve and the second throttle to keep the first aperture, and control the controlled valve to be in and close shape State；When the outdoor environment temperature is less than or equal to second preset temperature, the control device controls the first throttle Valve and the second throttle keep the second aperture, and control the controlled valve to be in opening, wherein, described second opens Degree is less than first aperture.
- 4. multiple on-line system as claimed in claim 2, it is characterised in that when the multiple on-line system is run with pure refrigeration mode When, if the saturation temperature is less than the first temperature threshold, wherein,When the outdoor environment temperature is more than the first preset temperature, the control device controls the first throttle valve and described Second throttle keeps the first aperture, and controls the controlled valve to be closed；When the outdoor environment temperature is less than or equal to first preset temperature and is more than the second preset temperature, the control dress Put and control the first throttle valve and the second throttle to keep the second aperture, and control the controlled valve to be in opening state State, wherein, second aperture is less than first aperture；When the outdoor environment temperature is less than or equal to second preset temperature, the control device controls the first throttle Valve and the second throttle keep the 3rd aperture, and control the controlled valve to be in opening, wherein, the described 3rd opens Degree is less than second aperture.
- 5. multiple on-line system as claimed in claim 2, it is characterised in that the cooling medium distributor includes and multiple indoor sets Corresponding multiple heating control valves and multiple refrigeration control valves, one end of each refrigeration control valve are all connected to second refrigerant Access port, the other end of each refrigeration control valve are connected to one end of corresponding indoor set, and one end of each heating control valve is equal The 3rd refrigerant access port is connected to, each other end for heating control valve is connected to one end of corresponding indoor set, each The other end of indoor set is all connected to the first refrigerant access port.
- 6. multiple on-line system as claimed in claim 5, it is characterised in that when the multiple on-line system is run with pure refrigeration mode When, each refrigeration control valve is in opening, and each control valve that heats is in closed mode, if at the controlled valve In opening, the First Heat Exchanger, second heat exchanger and the chassis heat exchanger are then condenser, wherein,The high pressure gaseous refrigerant discharged from the exhaust end of the compressor passes through the First Heat Exchanger, described second respectively Heat exchanger and the chassis heat exchanger are collected to the first refrigerant access port after being condensed, and are distributed and filled by the refrigerant Put and be separately dispensed into each indoor set, be changed into medium temperature low-pressure gaseous refrigerant after each indoor set evaporation endothermic, and pass through Each refrigeration control valve is collected to the second refrigerant access port, is then return to the compressor.
- 7. multiple on-line system as claimed in claim 5, it is characterised in that when the multiple on-line system is run with pure heating mode When, each refrigeration control valve is in closed mode, and each control valve that heats is in opening, and the controlled valve, which is in, to close Closed state, First Heat Exchanger and the second heat exchanger are evaporator, wherein,The high pressure gaseous refrigerant discharged from the exhaust end of the compressor enters the 3rd refrigerant by chassis four-way valve Access port, and it is changed into HTHP liquid refrigerant, institute after being condensed respectively by each heating control valve to each indoor set State HTHP liquid refrigerant and be pooled to the first refrigerant access port, and pass through the first throttle valve and described second respectively It is changed into low-temp low-pressure gas-liquid two-phase refrigerant after choke valve throttling, after then being evaporated by the First Heat Exchanger and the second heat exchanger It is changed into cryogenic overheating gaseous coolant and returns to the compressor.
- 8. multiple on-line system as claimed in claim 5, it is characterised in that when the multiple on-line system is run with main refrigeration mode When, the multiple indoor set includes refrigeration indoor set and heating indoor set, and refrigeration control valve corresponding to the refrigeration indoor set is equal In opening, heating control valve corresponding to the heating indoor set is in opening, and the controlled valve, which is in, closes State, the First Heat Exchanger and second heat exchanger are condenser, wherein, discharged from the exhaust end of the compressor High pressure gaseous refrigerant is divided into two-way,The first HTHP liquid refrigerant is condensed into by the First Heat Exchanger and second heat exchanger respectively all the way, it is described First HTHP liquid refrigerant enters the first refrigerant access port；Another way enters the 3rd refrigerant access port by chassis four-way valve, and enters heating indoor set by heating control valve Condensed, to be changed into the second HTHP liquid refrigerant, the second HTHP liquid refrigerant goes out in first refrigerant Enter after end converges with the first HTHP liquid refrigerant, be evaporated into refrigeration indoor set, then entered by refrigeration control valve Enter the second refrigerant access port, and the compressor is returned to by the chassis four-way valve.
- 9. multiple on-line system as claimed in claim 5, it is characterised in that when the multiple on-line system is run with main heating mode When, the multiple indoor set includes refrigeration indoor set and heating indoor set, and refrigeration control valve corresponding to the refrigeration indoor set is equal In opening, heating control valve corresponding to the heating indoor set is in opening, and the controlled valve, which is in, closes State, the First Heat Exchanger and the second heat exchanger are evaporator, wherein,The high pressure gaseous refrigerant discharged from the exhaust end of the compressor enters the 3rd refrigerant by chassis four-way valve Access port, and it is changed into HTHP liquid refrigerant after being condensed to heating indoor set by heating control valve, the high temperature is high Pressure liquid refrigerants is divided into two-way after being pooled to the first refrigerant access port, is changed into all the way after the indoor set evaporation endothermic that freezes Medium temperature low-pressure gaseous refrigerant, the compression is returned after being then collected to the second refrigerant access port by refrigeration control valve Machine, another way are cold by being changed into low-temp low-pressure gas-liquid two-phase after the first throttle valve and second throttle throttling respectively Matchmaker, then return to the compression by being changed into cryogenic overheating gaseous coolant after the First Heat Exchanger and the evaporation of the second heat exchanger Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720791590.3U CN206973924U (en) | 2017-06-29 | 2017-06-29 | Multiple on-line system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720791590.3U CN206973924U (en) | 2017-06-29 | 2017-06-29 | Multiple on-line system |
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| Publication Number | Publication Date |
|---|---|
| CN206973924U true CN206973924U (en) | 2018-02-06 |
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| CN201720791590.3U Active CN206973924U (en) | 2017-06-29 | 2017-06-29 | Multiple on-line system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238226A (en) * | 2017-06-29 | 2017-10-10 | 广东美的暖通设备有限公司 | Multiple on-line system and its control method |
-
2017
- 2017-06-29 CN CN201720791590.3U patent/CN206973924U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238226A (en) * | 2017-06-29 | 2017-10-10 | 广东美的暖通设备有限公司 | Multiple on-line system and its control method |
| CN107238226B (en) * | 2017-06-29 | 2023-08-29 | 广东美的暖通设备有限公司 | Multi-split system and control method thereof |
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