CN105841292A - Multi-split air conditioner system and liquid supplement control method thereof - Google Patents
Multi-split air conditioner system and liquid supplement control method thereof Download PDFInfo
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- CN105841292A CN105841292A CN201610173726.4A CN201610173726A CN105841292A CN 105841292 A CN105841292 A CN 105841292A CN 201610173726 A CN201610173726 A CN 201610173726A CN 105841292 A CN105841292 A CN 105841292A
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- Prior art keywords
- indoor set
- open state
- refrigeration
- line system
- fluid infusion
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
Abstract
The invention discloses a multi-split air conditioner system and a liquid supplement control method thereof. The liquid supplement control method comprises the following steps that the current operation mode of the multi-split air conditioner system is judged; when the current operation mode of the multi-split air conditioner system is a main heating mode, if an outdoor unit receives insufficient refrigeration capacity signals sent by a refrigeration indoor unit in the starting state, the insufficient refrigeration capacity signals are continued for first preset time, and the outdoor unit does not receive an insufficient heating capacity signal sent by a heating indoor unit in the starting state, a control valve is controlled to be opened; and if the outdoor unit receives insufficient heating capacity signals sent by the heating indoor unit in the starting state and the insufficient heating capacity signals are continued for second preset time, the control valve is controlled to be closed. According to the liquid supplement control method, when the multi-split air conditioner system is in the main heating mode, liquid supplement control is conducted on an outdoor heat exchanger by controlling opening and closing of the control valve, so that the thermal unbalance state of the multi-split air conditioner system is eliminated, and the reliability of the multi-split air conditioner system is enhanced. In addition, during the refrigeration and heating load balance, the effect that the multi-split air conditioner system is operated in the main heating mode is ensured as far as possible, and accordingly the energy efficiency of the multi-split air conditioner system is improved.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly relate to the fluid infusion control method of a kind of multiple on-line system and a kind of multi-connected machine
System.
Background technology
In air handling system for use multi-connected air conditioning system, frequent existing cooling load, there is again heating load, i.e.
Make, under environmental condition as in the winter time, also to have refrigeration demand.The meeting room of such as Center for Architecture, owing to surrounding is system
Hot room and room temperature are higher, and when the personnel of meeting room increase suddenly, temperature is easy to rise thus produces cooling load.
And at transition season, refrigeration, heating load more equalize, even if outdoor heat exchanger is opened as minimum, it is also difficult to make be
System reaches thermal balance, so that system is easy to toggle between chill formula and main refrigeration mode main heating, affects room
The comfortableness of interior environment and the reliability of system.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the one of the present invention
Purpose is to propose the fluid infusion control method of a kind of multiple on-line system, when multiple on-line system is in main heating mode, by control
The opening and closing of control valve processed carry out fluid infusion control to outdoor heat exchanger, to eliminate the thermal unbalance state of system, strengthen system
The reliability of system and the comfortableness of user.
Further object is that a kind of multiple on-line system of proposition.
For achieving the above object, one aspect of the present invention embodiment proposes the fluid infusion control method of a kind of multiple on-line system, described
Multiple on-line system includes off-premises station, multiple indoor set and part flow arrangement, and described off-premises station includes outdoor heat exchanger and compressor,
Described outdoor heat exchanger includes multiple heat exchange stream, one end of the fluid infusion stream in the plurality of heat exchange stream and described compressor
Air vent be connected, the gas-liquid that the other end of described fluid infusion stream is connected in described part flow arrangement by high-pressure stop valve is divided
Being provided with control valve between device, one end and the air vent of described compressor of described fluid infusion stream, described control valve is used for controlling
Being turned on and off of described fluid infusion stream, described fluid infusion control method comprises the following steps: judge working as of described multiple on-line system
Front operational mode；When the present mode of operation of described multiple on-line system is main heating mode, if described off-premises station receives
It is in the refrigeration refrigerating capacity shortage signal that sends of indoor set lasting first Preset Time and not receiving everywhere of open state
Heat, in open state, the heating capacity shortage signal that indoor set sends, then control described control valve and open；If described room
Outer machine receive be in open state heat heating capacity shortage signal that indoor set sends lasting the second Preset Time, then
Control described control valve to close.
The fluid infusion control method of multiple on-line system according to embodiments of the present invention, when the present mode of operation of multiple on-line system is main
During heating mode, it is in the refrigeration refrigerating capacity shortage signal that sends of indoor set of open state if off-premises station receives and holds
What continuous first Preset Time and not receiving was in open state heats the heating capacity shortage signal that indoor set sends, then control
Control valve processed is opened；If off-premises station receive be in open state heat heating capacity shortage signal that indoor set sends also
Continue the second Preset Time, then control control valve and close.Thus, by when multiple on-line system is in main heating mode, logical
The opening and closing crossing control control valve carry out fluid infusion control to outdoor heat exchanger, to eliminate system thermal unbalanced state, it is to avoid
When refrigeration, heating load more equalize, the area of simple outdoor heat exchanger and windscreen regulation are difficult to meet system heat balance
The problem that the system that state causes toggles between main heating mode and main refrigeration mode, enhance system reliability and
The comfortableness of user, and when refrigeration, heating load equilibrium, ensure that system runs on main heating mode as far as possible, improve system
Efficiency.And, opening controlling valve under main heating mode, it is also possible to the frost bottom removing outdoor heat exchanger, thus effectively
Prevent outdoor heat exchanger from freezing.
According to one embodiment of present invention, it is pure refrigeration or main refrigeration mode when the present mode of operation of described multiple on-line system
Time, control described control valve and be constantly in opening.
According to one embodiment of present invention, when the present mode of operation of described multiple on-line system is pure heating mode, control
Described control valve is constantly in closed mode.
According to one embodiment of present invention, described fluid infusion stream is positioned at the bottom of described outdoor heat exchanger.
According to one embodiment of present invention, big when the aperture of the restricting element in the arbitrary refrigeration indoor set being in open state
When the first air-out presetting aperture and this refrigeration indoor set is less than the first preset temperature with the return air temperature difference, this refrigeration indoor set is sent out
Go out refrigerating capacity shortage signal；When the aperture of the restricting element in each refrigeration indoor set being in open state is respectively less than second
When presetting aperture or be in air-out and the return air temperature difference of each refrigeration indoor set of open state more than the second preset temperature, place
Each refrigeration indoor set in open state does not the most send refrigerating capacity shortage signal；When the arbitrary heating chamber being in open state
The aperture of the restricting element in interior machine presets aperture more than the 3rd and this heats the air-out of indoor set and the return air temperature difference to be less than the 3rd pre-
If during temperature, this heats indoor set and sends heating capacity shortage signal；Heat in indoor set when being in each of open state
The aperture of restricting element the respectively less than the 4th presets aperture or each air-out heating indoor set being in open state and return air temperature
When difference is more than four preset temperatures, each indoor set that heats being in open state does not the most send heating capacity shortage signal.
For achieving the above object, another aspect of the present invention embodiment proposes a kind of multiple on-line system, including: part flow arrangement；
Multiple indoor sets；Off-premises station, described off-premises station includes that outdoor heat exchanger and compressor, described outdoor heat exchanger include multiple changing
Hot flowpath, one end of the fluid infusion stream in the plurality of heat exchange stream is connected with the air vent of described compressor, described fluid infusion
The other end of stream is connected to the gas-liquid separator in described part flow arrangement, one end of described fluid infusion stream by high-pressure stop valve
And being provided with control valve between the air vent of described compressor, described control valve is used for controlling being turned on and off of described fluid infusion stream,
Wherein, when the present mode of operation of described multiple on-line system is main heating mode, if described off-premises station receives it is in out
The refrigeration refrigerating capacity shortage signal that sends of indoor set of machine state also continues the first Preset Time and does not receives and be in start
State heat the heating capacity shortage signal that indoor set sends, described off-premises station then control described control valve open；If institute
State off-premises station receive be in open state heat heating capacity shortage signal that indoor set sends and persistently second when presetting
Between, described off-premises station then controls described control valve and closes.
Multiple on-line system according to embodiments of the present invention, when the present mode of operation of multiple on-line system is main heating mode, as
Really off-premises station receives and is in the refrigeration refrigerating capacity shortage signal that sends of indoor set of open state and persistently first when presetting
Between and do not receive the heating capacity shortage signal that indoor set sends that heats being in open state, then control control valve and open；
If off-premises station receive be in open state heat heating capacity shortage signal that indoor set sends and persistently second when presetting
Between, then control control valve and close.Thus, by when multiple on-line system is in main heating mode, by controlling control valve
Open and close outdoor heat exchanger is carried out fluid infusion control, to eliminate system thermal unbalanced state, it is to avoid refrigeration, heat negative
When lotus more equalizes, the area of simple outdoor heat exchanger and windscreen regulation are difficult to meet the system that system heat balance state causes
The problem toggled between main heating mode and main refrigeration mode, enhances the reliability of system and the comfortableness of user,
And when refrigeration, heating load equilibrium, ensure that system runs on main heating mode as far as possible, improve the efficiency of system.And,
Opening controlling valve under main heating mode, it is also possible to remove the frost bottom outdoor heat exchanger, thus effectively prevent outdoor heat exchanger
Freeze.
According to one embodiment of present invention, it is pure refrigeration or main refrigeration mode when the present mode of operation of described multiple on-line system
Time, described off-premises station controls described control valve and is constantly in opening.
According to one embodiment of present invention, when the present mode of operation of described multiple on-line system is pure heating mode, described
Off-premises station controls described control valve and is constantly in closed mode.
According to one embodiment of present invention, described fluid infusion stream is positioned at the bottom of described outdoor heat exchanger.
According to one embodiment of present invention, big when the aperture of the restricting element in the arbitrary refrigeration indoor set being in open state
When the first air-out presetting aperture and this refrigeration indoor set is less than the first preset temperature with the return air temperature difference, this refrigeration indoor set is sent out
Go out refrigerating capacity shortage signal；When the aperture of the restricting element in each refrigeration indoor set being in open state is respectively less than second
When presetting aperture or be in air-out and the return air temperature difference of each refrigeration indoor set of open state more than the second preset temperature, place
Each refrigeration indoor set in open state does not the most send refrigerating capacity shortage signal；When the arbitrary heating chamber being in open state
The aperture of the restricting element in interior machine presets aperture more than the 3rd and this heats the air-out of indoor set and the return air temperature difference to be less than the 3rd pre-
If during temperature, this heats indoor set and sends heating capacity shortage signal；Heat in indoor set when being in each of open state
The aperture of restricting element the respectively less than the 4th presets aperture or each air-out heating indoor set being in open state and return air temperature
When difference is more than four preset temperatures, each indoor set that heats being in open state does not the most send heating capacity shortage signal.
Accompanying drawing explanation
Fig. 1 is the flow chart of the fluid infusion control method of multiple on-line system according to embodiments of the present invention.
Fig. 2 is the structural representation of multiple on-line system according to an embodiment of the invention.
Reference: outdoor heat exchanger 1, cross valve 2, compressor 3,4, four check valves of outer machine gas-liquid separator 5,6,
7 and 8, four electromagnetic valves 9,10,11 and 12, gas-liquid separator 13, First Heat Exchanger the 14, first electric expansion valve 15,
Four check valve the 16,17,18 and 19, second heat exchanger the 20, second electric expansion valves 21, control valves 22.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the fluid infusion control method of the multiple on-line system proposed according to embodiments of the present invention and multi-joint is described
Machine system.
Fig. 1 is the flow chart of the fluid infusion control method of multiple on-line system according to embodiments of the present invention.Wherein, multiple on-line system
Including off-premises station, multiple indoor set and part flow arrangement, off-premises station includes outdoor heat exchanger and compressor, and outdoor heat exchanger includes
Multiple heat exchange streams, the one end of fluid infusion stream in multiple heat exchange streams is connected with the air vent of compressor, fluid infusion stream
The gas-liquid separator that the other end is connected in part flow arrangement by high-pressure stop valve, one end of fluid infusion stream and the aerofluxus of compressor
Being provided with control valve between Kou, control valve is for controlling being turned on and off of fluid infusion stream.
In one embodiment of the invention, fluid infusion stream is positioned at the bottom of outdoor heat exchanger.For example, it is possible to by outdoor heat exchange
Row's heat exchange stream bottom device is independent as fluid infusion stream, and the entrance of this fluid infusion stream is connected to compression by control valve
On pipe arrangement between air vent and the cross valve of machine, outlet is connected with the high press fit pipe of off-premises station, and control valve controls this fluid infusion stream
Being turned on and off of road, and, the selection of tube diameter is to ensure that pressure drop is not less than outdoor heat exchanger as pressure during vaporizer
Reduce to standard.
Specifically, as in figure 2 it is shown, in multiple on-line system, off-premises station includes outdoor heat exchanger 1, cross valve 2, compressor
3,4, four check valves 5,6,7 and 8 of outer machine gas-liquid separator and control valve 22.Wherein, compressor 3 has aerofluxus
Mouth and gas returning port, the air vent of compressor 3 is connected with the first valve port of cross valve 2, the gas returning port of compressor 3 and outer machine gas
One end of liquid/gas separator 4 is connected, and the other end of outer machine gas-liquid separator 4 is connected with the second valve port of cross valve 2.Outdoor is changed
First end of hot device 1 is connected with the 3rd valve port of cross valve 2, the second end of outdoor heat exchanger 1 respectively with the going out of check valve 7
Mouth is connected with the entrance of check valve 8, and the 3rd end (one end of fluid infusion stream) of outdoor heat exchanger 1 is by control valve 22 and pressure
The air vent of contracting machine 3 is connected, the 4th end (other end of fluid infusion stream) of outdoor heat exchanger 1 respectively with the going out of check valve 7
Mouthful be connected with the entrance of check valve 8, the 4th valve port of cross valve 2 respectively with outlet and the entrance of check valve 6 of check valve 5
It is connected.
Part flow arrangement include gas-liquid separator 13, First Heat Exchanger the 14, second heat exchanger the 20, first electric expansion valve 15,
Second electric expansion valve 21, four electromagnetic valve 9,10,11 and 12 and four check valves 16,17,18 and 19.Wherein,
First Heat Exchanger 14 and the second heat exchanger 20 can be plate type heat exchanger, and the first electric expansion valve 15 is connected to First Heat Exchanger
Between the entrance of the outlet of the first heat exchange stream of 14 and the first heat exchange stream of the second heat exchanger 20, the second electric expansion valve
The outlet of 21 the first heat exchange streams being connected to the second heat exchanger 20 and the entrance of the second heat exchange stream of the second heat exchanger 20 it
Between.Part flow arrangement is by four electromagnetic valves 9,10,11 and 12 and four check valves 16,17,18 and 19 and multiple indoor
Machine (not specifically illustrated in figure) is connected.
As it is shown in figure 1, the fluid infusion control method of this multiple on-line system comprises the following steps:
S1, it is judged that the present mode of operation of multiple on-line system.
Specifically, the operational mode of multiple on-line system includes main heating mode, main refrigeration mode, pure refrigeration mode and pure heats
Pattern.
As in figure 2 it is shown, when multiple on-line system is run with main heating mode, high from the air vent of compressor 3 high temperature out
Pressure gaseous coolant enters gas-liquid separator 13 by cross valve 2 and check valve 6, enters through electromagnetic valve 9 and electromagnetic valve 11
Heating indoor set, the liquid refrigerants heating indoor set outlet enters the second heat exchanger 20 through check valve 16 and check valve 18,
It is sent in cool room through check valve 17 and check valve 19 from the first heat exchange stream of the second heat exchanger 20 coolant part out
Machine, another part through heat restricting element 21 throttle laggard enter outdoor heat exchanger 1 evaporate.
When multiple on-line system is run with main refrigeration mode, lead to from the air vent of compressor 3 high pressure gaseous coolant out
Cross cross valve 2 and enter outdoor heat exchanger 1, after outdoor heat exchanger 1 condenses, enter gas-liquid separator 13 by check valve 8.
Indoor set condensation is heated, from heating chamber through electromagnetic valve 9 and electromagnetic valve 11 entrance from gas-liquid separator 13 gaseous coolant out
Interior machine coolant out enters the second heat exchanger 20 after mixing from gas-liquid separator 13 liquid refrigerants out, changes from second
First heat exchange stream of hot device 20 coolant out enters refrigeration indoor set evaporation through check valve 17 and check valve 19.
When multiple on-line system is run with pure refrigeration mode or pure heating mode, I will not elaborate for its coolant flow direction.
S2, when the present mode of operation of multiple on-line system is main heating mode, if off-premises station receives is in open state
The refrigeration refrigerating capacity shortage signal that sends of indoor set and continue the first Preset Time and do not receive and be in open state
Heat the heating capacity shortage signal that indoor set sends, then control control valve and open.Wherein, the first Preset Time can basis
Practical situation is demarcated.
S3, if off-premises station receive be in open state heat heating capacity shortage signal that indoor set sends persistently
Two Preset Times, then control control valve and close.Wherein, the second Preset Time can be demarcated according to practical situation.
According to one embodiment of present invention, big when the aperture of the restricting element in the arbitrary refrigeration indoor set being in open state
When the first air-out presetting aperture and this refrigeration indoor set is less than the first preset temperature with the return air temperature difference, this refrigeration indoor set is sent out
Go out refrigerating capacity shortage signal；When the aperture of the restricting element in each refrigeration indoor set being in open state is respectively less than second
When presetting aperture or be in air-out and the return air temperature difference of each refrigeration indoor set of open state more than the second preset temperature, place
Each refrigeration indoor set in open state does not the most send refrigerating capacity shortage signal；When the arbitrary heating chamber being in open state
The aperture of the restricting element in interior machine presets aperture more than the 3rd and this heats the air-out of indoor set and the return air temperature difference to be less than the 3rd pre-
If during temperature, this heats indoor set and sends heating capacity shortage signal；Heat in indoor set when being in each of open state
The aperture of restricting element the respectively less than the 4th presets aperture or each air-out heating indoor set being in open state and return air temperature
When difference is more than four preset temperatures, each indoor set that heats being in open state does not the most send heating capacity shortage signal.
Wherein, restricting element can be electric expansion valve.First preset aperture, second preset aperture, the 3rd preset aperture,
4th presets aperture, the first preset temperature, the second preset temperature, the 3rd preset temperature and the 4th preset temperature can be according to reality
Border situation is demarcated.Such as, first preset aperture preset aperture with the 3rd can be identical, be the first predetermined coefficient and be multiplied by
The maximum opening of restricting element, second preset aperture preset aperture with the 4th can be identical, be the second predetermined coefficient and be multiplied by joint
The maximum opening of fluid element.
It is to say, the fluid infusion control method of the multiple on-line system of the embodiment of the present invention is to be in master in multiple on-line system to heat mould
Carry out during formula, and when multiple on-line system is in main heating mode, decide whether opening controlling valve according to system requirements.
Wherein, when being in the refrigerating capacity shortage signal=ON of refrigeration indoor set of open state lasting the first Preset Time, and,
When being in the heating capacity deficiency=OFF heating indoor set of open state, control control valve and open, now from compressor out
A high pressure gaseous coolant part be directly entered outdoor heat exchanger；When be in open state heat indoor set heat energy
When power shortage signal=ON persistently the second Preset Time, control control valve and close.So that multiple on-line system refrigeration,
When heating load more equalizes, eliminate system thermal unbalance state, efficiently solve simple outdoor heat exchanger area and
Windscreen regulation is difficult to meet what the system that system heat balance state causes toggled between main heating mode and main refrigeration mode
Problem, enhances the reliability of system and the comfortableness of user, and when refrigeration, heating load equilibrium, ensures system as far as possible
Run on main heating mode, improve the efficiency of system.And, opening controlling valve under main heating mode, it is also possible to remove outdoor
The frost of exchanger base, effectively prevents outdoor heat exchanger from freezing.
And the fluid infusion in correlation technique controls to carry out under multiple on-line system is in main refrigeration mode, and, due to fluid infusion
Pipe is connected between the import and export of outdoor heat exchanger, when the heat exchange area of outdoor heat exchanger is less, and outdoor heat exchanger supercool
Degree is big, when the pressure drop of outdoor heat exchanger is bigger, is equivalent to, by outdoor heat exchanger short circuit, cause coolant heap in outdoor heat exchanger
Long-pending, finally cause system to occur lacking coolant state.Even and if the fluid infusion control method of the multiple on-line system of the embodiment of the present invention exists
In the case of worst, coolant at most accumulates in fluid infusion stream, and the coolant that fluid infusion stream can accumulate is little, the most not
The properly functioning of system can be impacted, improve the reliability of system.
According to one embodiment of present invention, when the present mode of operation of multiple on-line system is pure refrigeration or main refrigeration mode,
Control control valve and be constantly in opening, now, directly pass through from a compressor high pressure gaseous coolant part out
Control valve enters outdoor heat exchanger.
According to one embodiment of present invention, when the present mode of operation of multiple on-line system is pure heating mode, control
Valve is constantly in closed mode.It is understood that run when multiple on-line system is in pure heating mode, and need room
When external heat exchanger defrosts, can need to control control valve according to system and open, to reach the purpose of quickly defrosting.
In sum, the fluid infusion control method of the multiple on-line system of the embodiment of the present invention, currently run mould when multiple on-line system
When formula is main heating mode, if off-premises station receives is in the refrigerating capacity deficiency letter that the refrigeration indoor set of open state sends
Number and persistently the first Preset Time and not receiving be in open state heat the heating capacity shortage signal that indoor set sends,
Then control control valve to open；If off-premises station receive be in open state heat the heating capacity deficiency letter that indoor set sends
Number and lasting the second Preset Time, then control control valve and close.Thus, by when multiple on-line system is in main heating mode,
By controlling the opening and closing of control valve, outdoor heat exchanger is carried out fluid infusion control, to eliminate system thermal unbalanced state, keep away
Exempting from when refrigeration, heating load more equalize, the area of simple outdoor heat exchanger and windscreen regulation are difficult to meet system thermal and put down
The problem that the system that weighing apparatus state causes toggles between main heating mode and main refrigeration mode, enhances the reliability of system
With the comfortableness of user, and when refrigeration, heating load equilibrium, ensure that system runs on main heating mode as far as possible, improve system
The efficiency of system.And, opening controlling valve under main heating mode, it is also possible to remove the frost bottom outdoor heat exchanger, thus have
Effect prevents outdoor heat exchanger from freezing.
Fig. 2 is the structural representation of multiple on-line system according to an embodiment of the invention.As in figure 2 it is shown, this multi-connected machine system
System includes: part flow arrangement, multiple indoor set (not specifically illustrated in figure) and off-premises station.
Specifically, off-premises station includes outdoor heat exchanger 1 and compressor 3, and outdoor heat exchanger 1 includes multiple heat exchange stream, multiple
One end of fluid infusion stream in heat exchange stream is connected with the air vent of compressor 3, and the other end of fluid infusion stream is cut by high pressure
The gas-liquid separator 13 that only valve (not specifically illustrated in figure) is connected in part flow arrangement, one end of fluid infusion stream and compressor 3
Air vent between be provided with control valve 22, control valve 22 is for controlling being turned on and off of fluid infusion stream.
In one embodiment of the invention, fluid infusion stream is positioned at the bottom of outdoor heat exchanger 1.For example, it is possible to outdoor is changed
Row's heat exchange stream bottom hot device 1 is independent as fluid infusion stream, and the entrance of this fluid infusion stream is connected by control valve 22
On the pipe arrangement between the air vent and cross valve 2 of compressor 3, outlet is connected with the high press fit pipe of off-premises station, control valve 22
Control being turned on and off of this fluid infusion stream, and, the selection of tube diameter is to ensure that pressure drop is made not less than outdoor heat exchanger 1
It is as the criterion for pressure drop during vaporizer.
As in figure 2 it is shown, when the present mode of operation of multiple on-line system is main heating mode, be in if off-premises station receives
The refrigeration refrigerating capacity shortage signal that sends of indoor set of open state also continues the first Preset Time and not receiving and is in out
Machine state heat the heating capacity shortage signal that indoor set sends, off-premises station then controls control valve 22 and opens；If off-premises station
Receive be in open state heat heating capacity shortage signal that indoor set sends persistently the second Preset Time, off-premises station
Then control control valve 22 to close.
In one embodiment of the invention, big when the aperture of the restricting element in the arbitrary refrigeration indoor set being in open state
When the first air-out presetting aperture and this refrigeration indoor set is less than the first preset temperature with the return air temperature difference, this refrigeration indoor set is sent out
Go out refrigerating capacity shortage signal；When the aperture of the restricting element in each refrigeration indoor set being in open state is respectively less than second
When presetting aperture or be in air-out and the return air temperature difference of each refrigeration indoor set of open state more than the second preset temperature, place
Each refrigeration indoor set in open state does not the most send refrigerating capacity shortage signal；When the arbitrary heating chamber being in open state
The aperture of the restricting element in interior machine presets aperture more than the 3rd and this heats the air-out of indoor set and the return air temperature difference to be less than the 3rd pre-
If during temperature, this heats indoor set and sends heating capacity shortage signal；Heat in indoor set when being in each of open state
The aperture of restricting element the respectively less than the 4th presets aperture or each air-out heating indoor set being in open state and return air temperature
When difference is more than four preset temperatures, each indoor set that heats being in open state does not the most send heating capacity shortage signal.
It is to say, in an embodiment of the present invention, when multiple on-line system is in main heating mode, determine according to system requirements
Fixed the most whether opening controlling valve 22.Wherein, when being in the refrigeration refrigerating capacity shortage signal=ON of indoor set of open state and holding
Continuous first Preset Time, and, when being in the heating capacity deficiency=OFF heating indoor set of open state, control control valve
22 open, and are now directly entered outdoor heat exchanger 1 from a compressor 3 high pressure gaseous coolant part out；When being in
When the heating capacity shortage signal=ON heating indoor set of open state persistently the second Preset Time, control control valve 22 and close
Close.So that multiple on-line system is when refrigeration, heating load more equalize, eliminate the thermal unbalance state of system, effectively
Solve the area of simple outdoor heat exchanger and windscreen regulation is difficult to meet the system that system heat balance state causes and heats main
The problem toggled between pattern and main refrigeration mode, enhances the reliability of system and the comfortableness of user, and refrigeration,
During heating load equilibrium, ensure that system runs on main heating mode as far as possible, improve the efficiency of system.And, main heating mode
Lower opening controlling valve, it is also possible to remove the frost bottom outdoor heat exchanger, effectively prevent outdoor heat exchanger from freezing.
And the fluid infusion in correlation technique controls to carry out under multiple on-line system is in main refrigeration mode, and, due to fluid infusion
Pipe is connected between the import and export of outdoor heat exchanger, when the heat exchange area of outdoor heat exchanger is less, and outdoor heat exchanger supercool
Degree is big, when the pressure drop of outdoor heat exchanger is bigger, is equivalent to, by outdoor heat exchanger short circuit, cause coolant heap in outdoor heat exchanger
Long-pending, finally cause system to occur lacking coolant state.Even and if the multiple on-line system of the embodiment of the present invention is in the case of worst,
Coolant at most accumulates in fluid infusion stream, and the coolant that fluid infusion stream can accumulate is little, thus without the normal fortune to system
Row impacts, and improves the reliability of system.
According to one embodiment of present invention, when the present mode of operation of multiple on-line system is pure refrigeration or main refrigeration mode,
Off-premises station controls control valve 22 and is constantly in opening, now, from compressor 3 high pressure gaseous coolant out
Divide and directly enter outdoor heat exchanger 1 by control valve.
According to one embodiment of present invention, when the present mode of operation of multiple on-line system is pure heating mode, off-premises station control
Control valve 22 processed is constantly in closed mode.It is understood that run when multiple on-line system is in pure heating mode, and
When needing outdoor heat exchanger 1 is defrosted, can need to control control valve 22 according to system and open, to reach quickly defrosting
Purpose.
Multiple on-line system according to embodiments of the present invention, when the present mode of operation of multiple on-line system is main heating mode, as
Really off-premises station receives and is in the refrigeration refrigerating capacity shortage signal that sends of indoor set of open state and persistently first when presetting
Between and do not receive the heating capacity shortage signal that indoor set sends that heats being in open state, then control control valve and open；
If off-premises station receive be in open state heat heating capacity shortage signal that indoor set sends and persistently second when presetting
Between, then control control valve and close.Thus, by when multiple on-line system is in main heating mode, by controlling control valve
Open and close outdoor heat exchanger is carried out fluid infusion control, to eliminate system thermal unbalanced state, it is to avoid refrigeration, heat negative
When lotus more equalizes, the area of simple outdoor heat exchanger and windscreen regulation are difficult to meet the system that system heat balance state causes
The problem toggled between main heating mode and main refrigeration mode, enhances the reliability of system and the comfortableness of user,
And when refrigeration, heating load equilibrium, ensure that system runs on main heating mode as far as possible, improve the efficiency of system.And,
Opening controlling valve under main heating mode, it is also possible to remove the frost bottom outdoor heat exchanger, thus effectively prevent outdoor heat exchanger
Freeze.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ",
" outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferential " etc. instruction orientation or position relationship be based on
Orientation shown in the drawings or position relationship, be for only for ease of the description present invention and simplify description rather than instruction or hint institute
The device that refers to or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
Bright restriction.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed
Or implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two
Individual, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing "
Should be interpreted broadly Deng term, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be
It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal or the interaction relationship of two elements, unless otherwise clear and definite restriction.Common for this area
For technical staff, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can
Being that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, the
One feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or
Oblique upper, or it is merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ",
" lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or it is special to be merely representative of first
Levy level height less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or
Feature is contained at least one embodiment or the example of the present invention.In this manual, the schematic representation to above-mentioned term
Necessarily it is directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible
One or more embodiment in office or example combine in an appropriate manner.Additionally, in the case of the most conflicting, ability
The feature of the different embodiments described in this specification or example and different embodiment or example can be entered by the technical staff in territory
Row combines and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (10)
1. the fluid infusion control method of a multiple on-line system, it is characterised in that described multiple on-line system includes off-premises station, multiple
Indoor set and part flow arrangement, described off-premises station includes that outdoor heat exchanger and compressor, described outdoor heat exchanger include multiple heat exchange
Stream, one end of the fluid infusion stream in the plurality of heat exchange stream is connected with the air vent of described compressor, described fluid infusion stream
The other end on road is connected to the gas-liquid separator in described part flow arrangement by high-pressure stop valve, one end of described fluid infusion stream with
Being provided with control valve between the air vent of described compressor, described control valve is used for controlling being turned on and off of described fluid infusion stream,
Described fluid infusion control method comprises the following steps:
Judge the present mode of operation of described multiple on-line system；
When the present mode of operation of described multiple on-line system is main heating mode, if described off-premises station receives is in start
The refrigeration refrigerating capacity shortage signal that sends of indoor set of state also continues the first Preset Time and does not receives and be in start shape
State heat the heating capacity shortage signal that indoor set sends, then control described control valve open；
If described off-premises station receive be in open state heat heating capacity shortage signal that indoor set sends persistently
Two Preset Times, then control described control valve and close.
2. the fluid infusion control method of multiple on-line system as claimed in claim 1, it is characterised in that when described multiple on-line system
Present mode of operation when being pure refrigeration or main refrigeration mode, control described control valve and be constantly in opening.
3. the fluid infusion control method of multiple on-line system as claimed in claim 1 or 2, it is characterised in that when described multi-connected machine
When the present mode of operation of system is pure heating mode, controls described control valve and be constantly in closed mode.
4. the fluid infusion control method of multiple on-line system as claimed in claim 1, it is characterised in that described fluid infusion stream is positioned at
The bottom of described outdoor heat exchanger.
5. the fluid infusion control method of multiple on-line system as claimed in claim 1, it is characterised in that wherein,
When the aperture of the restricting element in the arbitrary refrigeration indoor set being in open state presets aperture and this cool room more than first
When the air-out of interior machine is less than the first preset temperature with the return air temperature difference, this refrigeration indoor set sends refrigerating capacity shortage signal；
When the aperture respectively less than second of the restricting element in each refrigeration indoor set being in open state is preset aperture or is in
When the air-out of each refrigeration indoor set of open state is more than the second preset temperature with the return air temperature difference, it is in each of open state
Refrigeration indoor set does not the most send refrigerating capacity shortage signal；
When the aperture of the arbitrary restricting element heated in indoor set being in open state presets aperture and this heating chamber more than the 3rd
When the air-out of interior machine is less than three preset temperatures with the return air temperature difference, this heats indoor set and sends heating capacity shortage signal；
When the aperture the respectively less than the 4th of each restricting element heated in indoor set being in open state is preset aperture or is in
When each air-out heating indoor set of open state is more than four preset temperatures with the return air temperature difference, it is in each of open state
Heat indoor set and the most do not send heating capacity shortage signal.
6. a multiple on-line system, it is characterised in that including:
Part flow arrangement；
Multiple indoor sets；
Off-premises station, described off-premises station includes that outdoor heat exchanger and compressor, described outdoor heat exchanger include multiple heat exchange stream,
One end of fluid infusion stream in the plurality of heat exchange stream is connected with the air vent of described compressor, described fluid infusion stream another
One end is connected to the gas-liquid separator in described part flow arrangement, one end of described fluid infusion stream and described pressure by high-pressure stop valve
Being provided with control valve between the air vent of contracting machine, described control valve is for controlling being turned on and off of described fluid infusion stream, wherein,
When the present mode of operation of described multiple on-line system is main heating mode,
If described off-premises station receives the refrigeration refrigerating capacity shortage signal that sends of indoor set persistently the being in open state
What one Preset Time and not receiving was in open state heats the heating capacity shortage signal that indoor set sends, described outdoor
Machine then controls described control valve and opens；
If described off-premises station receive be in open state heat heating capacity shortage signal that indoor set sends persistently
Two Preset Times, described off-premises station then controls described control valve and closes.
7. multiple on-line system as claimed in claim 6, it is characterised in that when the present mode of operation of described multiple on-line system
During for pure refrigeration or main refrigeration mode, described off-premises station controls described control valve and is constantly in opening.
Multiple on-line system the most as claimed in claims 6 or 7, it is characterised in that when the current operation of described multiple on-line system
When pattern is pure heating mode, described off-premises station controls described control valve and is constantly in closed mode.
9. multiple on-line system as claimed in claim 6, it is characterised in that described fluid infusion stream is positioned at described outdoor heat exchanger
Bottom.
10. multiple on-line system as claimed in claim 6, it is characterised in that wherein,
When the aperture of the restricting element in the arbitrary refrigeration indoor set being in open state presets aperture and this cool room more than first
When the air-out of interior machine is less than the first preset temperature with the return air temperature difference, this refrigeration indoor set sends refrigerating capacity shortage signal；
When the aperture respectively less than second of the restricting element in each refrigeration indoor set being in open state is preset aperture or is in
When the air-out of each refrigeration indoor set of open state is more than the second preset temperature with the return air temperature difference, it is in each of open state
Refrigeration indoor set does not the most send refrigerating capacity shortage signal；
When the aperture of the arbitrary restricting element heated in indoor set being in open state presets aperture and this heating chamber more than the 3rd
When the air-out of interior machine is less than three preset temperatures with the return air temperature difference, this heats indoor set and sends heating capacity shortage signal；
When the aperture the respectively less than the 4th of each restricting element heated in indoor set being in open state is preset aperture or is in
When each air-out heating indoor set of open state is more than four preset temperatures with the return air temperature difference, it is in each of open state
Heat indoor set and the most do not send heating capacity shortage signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610173726.4A CN105841292B (en) | 2016-03-23 | 2016-03-23 | Multi-line system and its fluid infusion control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610173726.4A CN105841292B (en) | 2016-03-23 | 2016-03-23 | Multi-line system and its fluid infusion control method |
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| CN105841292A true CN105841292A (en) | 2016-08-10 |
| CN105841292B CN105841292B (en) | 2018-09-07 |
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| CN106766326A (en) * | 2016-11-24 | 2017-05-31 | 广东美的暖通设备有限公司 | Multiple on-line system and its refrigeration in press restricting element control method |
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| Publication number | Publication date |
|---|---|
| CN105841292B (en) | 2018-09-07 |
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