CN104456846B - Control method for dual-system air conditioning unit - Google Patents
Control method for dual-system air conditioning unit Download PDFInfo
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- CN104456846B CN104456846B CN201410674604.4A CN201410674604A CN104456846B CN 104456846 B CN104456846 B CN 104456846B CN 201410674604 A CN201410674604 A CN 201410674604A CN 104456846 B CN104456846 B CN 104456846B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 69
- 230000008569 process Effects 0.000 claims abstract description 30
- 230000035939 shock Effects 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000005057 refrigeration Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 230000008859 change Effects 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 12
- 230000009977 dual effect Effects 0.000 claims description 10
- 230000003111 delayed effect Effects 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 15
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/54—Heating and cooling, simultaneously or alternatively
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method for a dual-system air conditioning unit, which comprises a starting process S100, wherein the starting process S100 is that after a first system and a second system finish heating work mode conversion, the first system and the second system are started. Because the first system and the second system are switched into the heating working mode and then started, when the first system and the second system are started, the two systems are all in the heating working mode, the problem that the two systems are influenced by each other due to heating of one system and refrigeration of the other system is effectively avoided, and the problem that the system is abnormally stopped due to thermal shock is solved. Meanwhile, the liquid impact hidden danger which possibly occurs in the first four-way valve and/or the second four-way valve is eliminated, and the operation reliability and the working stability of the dual-system air conditioning unit are improved.
Description
Technical field
The present invention relates to technical field of heat exchange equipment, in particular to a kind of control for dual-system air conditioning group
Method.
Background technology
Part recuperation of heat dual-system air conditioning group in the winter time when it is necessary to have air-conditioning heating and the work(of domestic hot-water's function
Energy.The control method for dual-system air conditioning group is broadly divided into two kinds at present：
First, opened together and stopped together using dual system, compressor and four-way valve are started by sequence.Opened because dual system is same with the wink stopped
Between voltage, electric current it is excessive, power network can be impacted, thus the life-span of influence dual-system air conditioning group, be unfavorable for the use of user
Electric safety.
2nd, start and stop are distinguished using dual system in order, compressor and four-way valve are started by sequence.But this kind of control method exists
Following problem is still suffered from during operation：
Startup stage：The pressured difference of four-way valve is commutated, and heating operation system is also that first operation is freezed, and then four-way valve is changed
To switching to and heat mode of operation.Assuming that the first system is first opened, the state of heating is had been enter into, is system when second system is just opened
Cold state, such second system will produce influence to the first system.Now, the first system is mainly raising water temperature, and second
System is pulled low in reduction water temperature, the evaporator temperature of the first system, and corresponding evaporating pressure is also reduced, now dual system air-conditioning
The conventional low-voltage variation of unit detects abnormal conditions, the compressor of meeting positive closing correspondence system.Therefore, dual system can be caused
Air-conditioner set system frequently occurs subnormal pressure protection, causes dual-system air conditioning group frequently to add unloading to shut down.Meanwhile, recuperation of heat
Function, which produces liquid hammer when thermal shock can also make the four-way valve commutate to heating, causes four-way valve to damage.
Operation phase：There are the feelings that system adds unloading with the change of thermic load in dual-system air conditioning group running
Condition, occurs the situation for starting thermal shock again.
Shut-down-phase：When dual-system air conditioning group terminates to shut down, heat recovery function stops simultaneously with compressor.But due to water
As refrigerating medium, compressor stops, and system still has the process of heat exchange.Now there is liquid refrigerant in four-way valve, and commutate meeting
There is liquid hit phenomenon, cause four-way valve to damage.
In summary, there are the following problems in use for dual-system air conditioning group of the prior art：
1st, under winter heating and domestic hot-water's function, part heat recovery function produces thermal shock to heat-production functions, unit without
Method is normally run；
2nd, dual system starts, terminates there is high frequent start and stop, the hidden danger of four-way valve liquid hazards when shutting down；
3rd, in dual system operation there is adverse effect in the change of extraneous thermic load to system.
The content of the invention
It is a primary object of the present invention to provide a kind of control method for dual-system air conditioning group, to solve existing skill
When dual-system air conditioning group starts in art the problem of easy cancel closedown.
To achieve these goals, the invention provides a kind of control method for dual-system air conditioning group, including open
Machine process S100, start process S100 are that the first system and second system complete to heat after working mode change, restart the
One system and second system.
Further, the method for heating working mode change is by the first four-way valve 10 of the first system and second system
Second four-way valve 20 is converted to by initial refrigeration work pattern connected state and heats mode of operation connected state.
Further, start process S100 includes：Step S110：First compressor 11 of the first system starts, and the one or four
Port valve 10 commutates to heating mode of operation；Step S120：First compressor 11 is shut down；Step S130：Second pressure of second system
Contracting machine 21 starts, and the second four-way valve 20 commutates to heating mode of operation；Step S140：Second compressor 21 is shut down；Step S150：
First compressor 11 and the second compressor 21 start.
Further, step S110 includes：Step S111：First compressor 11 starts；Step S112：Delay waits first
The scheduled time；Step S113：The switch operation of first four-way valve 10.
Further, step S130 includes：Step S131：Second compressor 21 starts；Step S132：Delay waits second
The scheduled time；Step S133：The switch operation of second four-way valve 20.
Further, step S150 includes：Step S151：First compressor 11 starts；Step S152：Delay waits the 3rd
The scheduled time；Step S153：Second compressor 21 starts.
Further, control method also includes running S200, and running S200 is according to environmental heat load situation
Determine the working condition of the first system and second system.
Further, running S200 includes：Step S210：The actual inflow temperature of dual-system air conditioning group is detected,
To determine the working condition of the first system and second system, repeated when the working condition of the first system and second system is constant
Step S210, only continues step when the second compressor 21 of second system is shut down and needs the second compressor 21 of restarting
S220, continues step S230 when the first compressor 11 and the second compressor 21 of the first system are shut down, only when the second compression
Machine 21 is shut down and keeps the working condition of the first system constant and repeat step S210 when need not restart the second compressor 21；
Step S220：Judge whether the second compressor 21 of restarting causes thermal shock to the first system, and determine directly to restart
Second compressor 21 or start process S100 is repeated after the first compressor 11 is shut down；Step S230：Repeat start process
S100。
Further, step S210 includes：Step S211：The actual inflow temperature of dual-system air conditioning group is detected, will be double
Actual inflow temperature and the target water temperature of system air conditioner unit are compared, when the actual inflow temperature of dual-system air conditioning group is big
The second compressor 21 is shut down when equal to target water temperature, and continues step S212, otherwise, the first system and second system is kept
Working condition it is constant, and repeat step S211；Step S212：Continue the actual inflow temperature of detection dual-system air conditioning group,
The actual inflow temperature of dual-system air conditioning group is compared with target water temperature, water temperature is actually entered when dual-system air conditioning group
The first compressor 11 is shut down and continues step S230 when degree is still greater than target water temperature, when the actual water inlet of dual-system air conditioning group
Temperature keeps the working condition of the first system constant and repeat step S212 when being equal to target water temperature, when dual-system air conditioning group
Actual inflow temperature continues step S220 when being less than target water temperature.
Further, step S220 includes：Step S221：The actual exhaust air temperature of the first compressor 11 is detected, will be actual
Delivery temperature is compared with target exhaust temperature, and when actual exhaust air temperature is more than target exhaust temperature, second system will not be to the
One system causes thermal shock and continues step S222, otherwise continues step S223；Step S222：Second compressor 21 is opened,
And repeat step S210 to step S230；Step S223：The second system meeting when actual exhaust air temperature is less than target exhaust temperature
Thermal shock is caused to the first system, start process S100 is repeated after the first compressor 11 is shut down.
Further, control method also includes shutdown process S300, and shutdown process S300 is in the first compressor 11 and the
Two compressors 21 first stop the heat recovery function of the first system and second system before shutting down.
Further, shutdown process S300 includes：Step S310：The heat recovery function of the first system and second system is closed
Close；Step S320：It was delayed for the 4th scheduled time；Step S330：First compressor 11 and the second compressor 21 are shut down；Step
S340：It was delayed for the 5th scheduled time；Step S350：First four-way valve 10 and the commutation of the second four-way valve 20 are reset to refrigeration work mould
Formula.
Further, by closing the recuperation of heat water pump of the first system and second system so that heat recovery function to be closed.
Apply the technical scheme of the present invention, after the first system and second system complete to heat working mode change, then
Start the first system and second system, the problem of to solve easy cancel closedown when dual-system air conditioning group starts.Due to by
One system and second system are first converted to heat to be restarted after mode of operation, thus after the first system and second system start,
Two systems, which are fully entered, heats mode of operation, effectively prevent a system heat, a cooling system and cause the two phase
Mutually influence the problem of, solve thermal shock may lead to system abnormity shutdown the problem of.Meanwhile, eliminate the first four-way valve and/
Or the second liquid hammer hidden danger that is likely to occur of four-way valve, improve the operational reliability and job stability of dual-system air conditioning group.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the structural representation of the dual-system air conditioning group in the present invention；
Fig. 2 shows the flow chart of the start process in the control method in the present invention；
Fig. 3 shows the flow chart of the running in the control method in the present invention；And
Fig. 4 shows the flow chart of the shutdown process in the control method in the present invention.
Wherein, above-mentioned accompanying drawing is marked including the following drawings：
10th, the first four-way valve；11st, the first compressor；12nd, heat recovering heat exchanger；13rd, the first vapour liquid separator；14th, first
Electric expansion valve；20th, the second four-way valve；21st, the second compressor；23rd, the second vapour liquid separator；24th, the second electric expansion valve；
30th, heat source side heat exchanger；40th, using side heat exchanger；50th, the first pipeline；51st, the second pipeline；52nd, the 3rd pipeline；53rd, the 4th pipe
Road；54th, the 5th pipeline；55th, the 6th pipeline；56th, the 7th pipeline；57th, the 8th pipeline；58th, the 9th pipeline.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As the first aspect of the invention, there is provided a kind of dual-system air conditioning group.As shown in figure 1, dual system air-conditioning
It is swollen that unit includes the first four-way valve 10, the first compressor 11, heat recovering heat exchanger 12, the first vapour liquid separator 13, the first electronics
Swollen valve 14, the second four-way valve 20, the second compressor 21, the second vapour liquid separator 23, the second electric expansion valve 24, heat source side heat exchange
Device 30, use side heat exchanger 40, the first pipeline 50, the second pipeline 51, the 3rd pipeline 52, the 4th pipeline 53, the 5th pipeline 54,
Six pipelines 55, the 7th pipeline 56, the 8th pipeline 57 and the 9th pipeline 58, wherein, the relation of above-mentioned each part is as shown in Figure 1.
When dual-system air conditioning group is in refrigeration work pattern, only by taking the first system as an example, the flow path of refrigerant is
First pipeline 50, the second pipeline 51, the 3rd pipeline 52, the 4th pipeline 53, the 5th pipeline 54, the 6th pipeline 55, the 7th pipeline 56,
8th pipeline 57, the 9th pipeline 58 are back to the first pipeline 50.
When dual-system air conditioning group, which is in, heats mode of operation, only by taking the first system as an example, the flow path of refrigerant is
First pipeline 50, the second pipeline 51, the 6th pipeline 55, the 5th pipeline 54, the 4th pipeline 53, the 3rd pipeline 52, the 7th pipeline 56,
8th pipeline 57, the 9th pipeline 58 are back to the first pipeline 50.
As the second aspect of the invention, there is provided a kind of control method for dual-system air conditioning group.Such as Fig. 2 extremely
Shown in Fig. 4, control method includes start process S100, and start process S100 is that the first system and second system complete to heat work
After operation mode conversion, restart the first system and second system.Preferably, the method for working mode change is heated to be by first
First four-way valve 10 of system and the second four-way valve 20 of second system are converted to by initial refrigeration work pattern connected state and heated
Mode of operation connected state..Restart due to being first converted to heat the first system and second system after mode of operation, thus work as
After the first system and second system start, two systems, which are fully entered, heats mode of operation, effectively prevent a system heat,
One cooling system and cause the problem of the two influences each other, solve thermal shock may lead to system abnormity shutdown the problem of.
Meanwhile, the liquid hammer hidden danger that the first four-way valve 10 and/or the second four-way valve 20 are likely to occur is eliminated, dual-system air conditioning is improved
The operational reliability and job stability of group.
As shown in Fig. 2 start process S100 includes：Step S110：First compressor 11 of the first system starts, and the one or four
Port valve 10 commutates to heating mode of operation；Step S120：First compressor 11 is shut down；Step S130：Second pressure of second system
Contracting machine 21 starts, and the second four-way valve 20 commutates to heating mode of operation；Step S140：Second compressor 21 is shut down；Step S150：
First compressor 11 and the second compressor 21 start.Due to completing changing for the first four-way valve 10 in step S110 and step S120
To operation, and complete in step S130 and step S140 the switch operation of the second four-way valve 20, thus when performing step S150
When starting the first compressor 11 and the second compressor 21, it can rapidly enter dual-system air conditioning group and heat and recuperation of heat mould
Formula, being prevented effectively from causes the problem of thermal shock of dual-system air conditioning group, protection are shut down because of a certain cooling system, so as to ensure that
The operational reliability of the control method of dual-system air conditioning group.
Preferably, step S110 includes：Step S111：First compressor 11 starts；Step S112：Delay wait first is pre-
Fix time；Step S113：The switch operation of first four-way valve 10.Because the first four-way valve 10 is commutated by pressure, thus when first
Compressor 11 starts and is delayed after first scheduled time, and the first four-way valve 10 can just complete switch operation, so as to ensure that first
The commutation reliability of four-way valve 10.
Preferably, step S130 includes：Step S131：Second compressor 21 starts；Step S132：Delay wait second is pre-
Fix time；Step S133：The switch operation of second four-way valve 20.Because the second four-way valve 20 is commutated by pressure, thus when second
Compressor 21 starts and is delayed after second scheduled time, and the second four-way valve 20 can just complete switch operation, so as to ensure that second
The commutation reliability of four-way valve 20.
Preferably, step S150 includes：Step S151：First compressor 11 starts；Step S152：Delay wait the 3rd is pre-
Fix time；Step S153：Second compressor 21 starts.Second compressor 21 just starts after starting due to the first compressor 11, because
And be prevented effectively from the two and start the impact that may be caused to power network simultaneously, the safety in operation of dual-system air conditioning group is improved,
And ensure that the startup reliability of dual-system air conditioning group.
Control method in the present invention also includes running S200, and running S200 is according to environmental heat load situation
Determine the working condition of the first system and second system.By determining the first system and second system according to environmental heat load situation
Working condition, energy waste can be prevented effectively from, and ensure the operational reliability of the first system and second system.
As shown in Fig. 2 running S200 includes：Step S210：The actual inflow temperature of dual-system air conditioning group is detected,
To determine the working condition of the first system and second system, repeated when the working condition of the first system and second system is constant
Step S210, only continues step when the second compressor 21 of second system is shut down and needs the second compressor 21 of restarting
S220, continues step S230 when the first compressor 11 and the second compressor 21 of the first system are shut down, only when the second compression
Machine 21 is shut down and keeps the working condition of the first system constant and repeat step S210 when need not restart the second compressor 21；
Step S220：Judge whether the second compressor 21 of restarting causes thermal shock to the first system, and determine directly to restart
Second compressor 21 or step S110 is repeated to step S150 after the first compressor 11 is shut down；Step S230：Repeat to walk
Rapid S110 to step S150.By the actual inflow temperature for detecting dual-system air conditioning group, it may be determined that dual-system air conditioning group
Current running situation, when environmental heat load declines, when requiring to reduce to the thermal output of dual-system air conditioning group, by near
A few system-down, can be while ensureing that heat supply is reliable, reduction energy consumption, the power consumption of reduction dual-system air conditioning group, from
And improve the operational reliability of dual-system air conditioning group.
It should be noted that when being detected to the actual inflow temperature of dual-system air conditioning group, detection is to use side
The inflow temperature value of heat exchanger 40.
Preferably, step S210 includes：Step S211：The actual inflow temperature of dual-system air conditioning group is detected, by double systems
The actual inflow temperature of system air-conditioner set is compared with target water temperature, when the actual inflow temperature of dual-system air conditioning group is more than
The second compressor 21 is shut down during equal to target water temperature, and continues step S212, otherwise, the first system and second system is kept
Working condition is constant, and repeat step S211；Step S212：Continue the actual inflow temperature of detection dual-system air conditioning group, will
Actual inflow temperature and the target water temperature of dual-system air conditioning group are compared, when the actual inflow temperature of dual-system air conditioning group
The first compressor 11 is shut down during still greater than target water temperature and continues step S230, water temperature is actually entered when dual-system air conditioning group
Degree keeps the working condition of the first system constant and repeat step S212 when being equal to target water temperature, when the reality of dual-system air conditioning group
Border inflow temperature continues step S220 when being less than target water temperature.
In step S211, when the actual inflow temperature of dual-system air conditioning group is too high, illustrate now carrying capacity of environment it is small,
The power consumption of dual-system air conditioning group is excessive, now can be by by a system-down, and reduces the defeated of dual-system air conditioning group
Go out, so that the dual-system air conditioning group of only one system work meets the demand of now carrying capacity of environment, it is to avoid the wave of the energy
Take.But, when the actual inflow temperature of dual-system air conditioning group is too small, illustrate that now dual-system air conditioning group is not met by
The requirement of carrying capacity of environment, therefore need to work on, to lift environment temperature.
In step S212, after a system is unloaded, detect that the actual inflow temperature of dual-system air conditioning group is still too high
When, illustrate that the power consumption of now dual-system air conditioning group is still too high, carrying capacity of environment very little, excessive heat can not be consumed, now
Two systems can completely be unloaded, to avoid the waste of the energy.But when the actual inflow temperature of dual-system air conditioning group reduces
And during less than target water temperature, now need the system that will have been shut down to come into operation again, that is, continue step S220.Work as reality
When inflow temperature is consistent with target water temperature, illustrate that dual-system air conditioning group enters steady operational status, now keep the operation shape
State, untill thermic load changes.
Illustrate the change of thermic load for example, it is assumed that dual-system air conditioning group is simultaneously to multiple room heat supplies, as long as having
Air conditioning function is closed in more than one room, and the thermic load of dual-system air conditioning group will reduce.Now dual-system air conditioning group
It can discriminate whether to reach that user is required, it is necessary to need not stop a system；When the room for closing air conditioning function is more,
Dual-system air conditioning group agrees that all systems can be temporarily ceased.
In step S220, when needing the second compressor 21 of restarting, blindly the second compressor 21 can not be started,
But should detect whether the startup of the second compressor 21 can cause thermal shock to the first system, when it is determined that the second compressor 21
Startup will not cause start the second compressor 21 during thermal shock to the first system, if it is determined that the second compressor 21 can be to the
One system causes thermal shock, then needs to repeat step S110 after the first compressor 11 is shut down to step S150, because
When the second compressor 21 can cause thermal shock to the first system, start the second compressor 21 rashly, second system can be started
When the normal of refrigeration work mode influences the first system heat mode of operation, the actual water temperature of dual-system air conditioning group can be caused
Reduction, so as to cause dual-system air conditioning group to there is the risk of cancel closedown, also easily causes the first four-way valve 10 and/or the 2nd 4
The liquid hammer of port valve 20.Particularly after the second compressor 21 shuts down a period of time, after the pressure differential collapses of the second four-way valve 20, second
Four-way valve 20 can return to original state, that is, refrigeration work position, now need to start before the second compressor 21, it is necessary to consider
Second compressor 21 starts the problem of whether causing thermal shock to the first system.
Preferably, step S220 includes：Step S221：The actual exhaust air temperature of the first compressor 11 is detected, by actual row
Temperature degree is compared with target exhaust temperature, and when actual exhaust air temperature is more than or equal to target exhaust temperature, second system will not be right
The first system causes thermal shock and continues step S222, otherwise continues step S223；Step S222：Second compressor 21 is opened
Open, and repeat step S210 to step S230；Step S223：The second system when actual exhaust air temperature is less than target exhaust temperature
Thermal shock can be caused to the first system, step S110 is repeated after the first compressor 11 is shut down to step S150.
In step S221 and step S222, when actual exhaust air temperature is more than or equal to target exhaust temperature, illustrate now
The heating capacity of the first system is stronger, even if now opening the second compressor 21, also will not cause larger to the first system
Influence, thereby may be ensured that the operation stability of dual-system air conditioning group.
In step S221 and step S223, when actual exhaust air temperature is less than target exhaust temperature, illustrate now first
The heating capacity of system is weaker, now rashly opens the second compressor 21, can cause dual-system air conditioning group while there is system
The situation of heat, refrigeration, thus now need to shut down on the first compressor 11, then passing through above-mentioned start process S100 progress
Starting up, so as to ensure that the functional reliability of dual-system air conditioning group.
Preferably, target exhaust temperature is 60 degrees Celsius.
Control method in the present invention also includes shutdown process S300, and shutdown process S300 is in the first compressor 11 and the
Two compressors 21 first stop the heat recovery function of the first system and second system before shutting down.
As shown in figure 4, shutdown process S300 includes：Step S310：By the first system and the heat recovery function of second system
Close；Step S320：It was delayed for the 4th scheduled time；Step S330：First compressor 11 and the second compressor 21 are shut down；Step
S340：It was delayed for the 5th scheduled time；Step S350：First four-way valve 10 and the commutation of the second four-way valve 20 are reset to refrigeration work mould
Formula.
Preferably, the 4th scheduled time was 5 minutes.The preferential heat recovery function that stops stops the first compressor again after 5 minutes
11 and second compressor 21, it can be ensured that be overheated gas in the first four-way valve 10 and the second four-way valve 20, no liquid refrigerants,
So as to prevent from shutting down the problem of the first four-way valve 10 and/or the commutation of the second four-way valve 20 cause liquid hazards after power-off.
In step S330, after the first compressor 11 and the shutdown of the second compressor 21, it will not become further according to water temperature is heated
Change and start.
Preferably, by closing the recuperation of heat water pump of the first system and second system so that heat recovery function to be closed.Work as heat
When recovered water pump is closed, now heat recovering heat exchanger 12 is common pipeline, no longer plays a part of recuperation of heat.
By setting a kind of control method to dispatch the relation of compressor and four-way valve start and stop in the present invention, realize that dual system is empty
Adjust unit heat in the winter time and hot water function under three strategic points：System unit is reliable when starting, run, terminating to shut down
Control, the start and stop of reduction high frequent, the hidden danger of four-way valve liquid hammer, improves the reliability of unit operation.
As can be seen from the above description, the above embodiments of the present invention realize following technique effect：
1st, ensure that user heats the stability with hot water function, dual-system air conditioning group need not frequent start-stop, it is possible to complete
Complete realize heats and hot water function, substantially increases the comfortableness that user uses；
2nd, the compressor and four-way valve in dual-system air conditioning group can be effectively protected using the control method in the present invention,
By setting effectively rational control sequence, it is possible to increase compressor and four-way valve service life；
3rd, dual-system air conditioning group has the characteristics of operational reliability is good, in the process of running, can be negative according to actual heat
The change of lotus adjusts the state of dual-system air conditioning group in time.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (12)
1. a kind of control method for dual-system air conditioning group, it is characterised in that described to start shooting including start process S100
Journey S100 is that the first system and second system complete to heat after working mode change, restarts the first system and described the
Two system, the start process S100 includes：
Step S110：The first compressor (11) of the first system starts, and the first four-way valve (10) of the first system is changed
Mode of operation is heated to described；
Step S120：First compressor (11) is shut down；
Step S130：The second compressor (21) of the second system starts, and the second four-way valve (20) of the second system is changed
Mode of operation is heated to described；
Step S140：Second compressor (21) is shut down；
Step S150：First compressor (11) and second compressor (21) start.
2. control method according to claim 1, it is characterised in that the method for heating working mode change is by institute
The second four-way valve (20) of the first four-way valve (10) and the second system of stating the first system is connected by initial refrigeration work pattern
Logical State Transferring is to heat mode of operation connected state.
3. control method according to claim 1, it is characterised in that the step S110 includes：
Step S111：First compressor (11) starts；
Step S112：Delay waited for first scheduled time；
Step S113：First four-way valve (10) switch operation.
4. control method according to claim 1, it is characterised in that the step S130 includes：
Step S131：Second compressor (21) starts；
Step S132：Delay waited for second scheduled time；
Step S133：Second four-way valve (20) switch operation.
5. control method according to claim 1, it is characterised in that the step S150 includes：
Step S151：First compressor (11) starts；
Step S152：Delay waited for the 3rd scheduled time；
Step S153：Second compressor (21) starts.
6. control method according to claim 1, it is characterised in that the control method also includes running S200,
The running S200 is the working condition that the first system and the second system are determined according to environmental heat load situation.
7. control method according to claim 6, it is characterised in that the running S200 includes：
Step S210：The actual inflow temperature of dual-system air conditioning group is detected, to determine that the first system and described second is
The working condition of system, the repeating said steps S210 when the working condition of the first system and the second system is constant,
Only continue to walk when the second compressor (21) of the second system is shut down and needs to restart the second compressor (21)
Rapid S220, step is continued when the first compressor (11) and second compressor (21) of the first system are shut down
S230, only keeps described first when second compressor (21) is shut down and need not restart the second compressor (21)
The working condition of system is constant and repeating said steps S210；
The step S220：Judge whether restarting second compressor (21) causes thermal shock to the first system,
And determine directly to restart second compressor (21) or repeated after first compressor (11) is shut down described
Start process S100；
The step S230：Repeat the start process S100.
8. control method according to claim 7, it is characterised in that the step S210 includes：
Step S211：The actual inflow temperature of the dual-system air conditioning group is detected, by the dual-system air conditioning group
The actual inflow temperature is compared with target water temperature, when the actual inflow temperature of the dual-system air conditioning group is more than
Second compressor (21) is shut down during equal to the target water temperature, and continues step S212, otherwise, holding described first is
The working condition of system and the second system is constant, and repeating said steps S211；
The step S212：Continue the actual inflow temperature of the detection dual-system air conditioning group, the dual system is empty
The actual inflow temperature of unit is adjusted to be compared with the target water temperature, when the reality of the dual-system air conditioning group
First compressor (11) is shut down when inflow temperature is still greater than the target water temperature and continues the step S230, when described
The actual inflow temperature of dual-system air conditioning group keeps the working condition of the first system when being equal to the target water temperature
Constant and repeating said steps S212, when the actual inflow temperature of the dual-system air conditioning group is less than the target water temperature
Step S220 described in Shi Jixu.
9. control method according to claim 7, it is characterised in that the step S220 includes：
Step S221：The actual exhaust air temperature of first compressor (11) is detected, the actual exhaust air temperature and target are arranged
Temperature degree compares, and when the actual exhaust air temperature is more than the target exhaust temperature, the second system will not be to described the
One system causes thermal shock and continues step S222, otherwise continues step S223；
The step S222：Second compressor (21) is opened, and repeating said steps S210 to the step S230；
The step S223：When the actual exhaust air temperature is less than the target exhaust temperature, the second system can be to described
The first system causes thermal shock, and the start process S100 is repeated after first compressor (11) is shut down.
10. control method according to claim 1, it is characterised in that the control method also includes shutdown process S300,
The shutdown process S300 is first to stop described the before first compressor (11) and second compressor (21) shutdown
The heat recovery function of one system and the second system.
11. control method according to claim 10, it is characterised in that the shutdown process S300 includes：
Step S310：The heat recovery function of the first system and the second system is closed；
Step S320：It was delayed for the 4th scheduled time；
Step S330：First compressor (11) and second compressor (21) are shut down；
Step S340：It was delayed for the 5th scheduled time；
Step S350：First four-way valve (10) and second four-way valve (20) commutation are reset to refrigeration work pattern.
12. control method according to claim 10, it is characterised in that by closing the first system and described second
The recuperation of heat water pump of system is so that the heat recovery function to be closed.
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| CN104791912A (en) * | 2015-04-27 | 2015-07-22 | 广东美的暖通设备有限公司 | Multi-compressor air conditioning system and control method thereof |
| CN106352604A (en) * | 2016-10-25 | 2017-01-25 | 佛山市澳霆环境设备制造有限公司 | Water cooling control system with multiple compressors and operating method |
| DE102017214941A1 (en) | 2017-08-25 | 2019-02-28 | Dometic Sweden Ab | Recreational vehicle, cooling device, control system and method of controlling the cooling device |
| WO2019082168A1 (en) | 2017-10-27 | 2019-05-02 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| CN107763887B (en) * | 2017-11-03 | 2020-08-04 | 广东芬尼能源技术有限公司 | Energy level control method and control device for dual-system heat pump unit |
| CN108507125B (en) * | 2018-01-23 | 2020-12-18 | 青岛海尔空调电子有限公司 | Air conditioning unit compound mode control method |
| CN112594885B (en) * | 2019-04-19 | 2022-09-06 | 青岛海尔空调器有限总公司 | Air conditioner and control method thereof |
| CN111442561A (en) * | 2020-04-24 | 2020-07-24 | 芜湖弋江海创高新智能空调股份有限公司 | Air conditioner host internal structure with compact dual-system heat recovery function |
| CN114484716A (en) * | 2022-01-11 | 2022-05-13 | 珠海格力电器股份有限公司 | Air conditioner, control method and device thereof and computer readable storage medium |
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