CN107614984A - The control device of air-conditioning system, air-conditioning system, the control method of the control program of air-conditioning system and air-conditioning system - Google Patents
The control device of air-conditioning system, air-conditioning system, the control method of the control program of air-conditioning system and air-conditioning system Download PDFInfo
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- CN107614984A CN107614984A CN201680017419.5A CN201680017419A CN107614984A CN 107614984 A CN107614984 A CN 107614984A CN 201680017419 A CN201680017419 A CN 201680017419A CN 107614984 A CN107614984 A CN 107614984A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0294—Control issues related to the outdoor fan, e.g. controlling speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/195—Pressures of the condenser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/197—Pressures of the evaporator
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Air conditioner controller control carries out the multi-connected air conditioning system for independently making the constant control of the operating pressure of refrigerant with indoor load.And, the air conditioner controller controls the rotating speed of compressor in a manner of the operating pressure of refrigerant is turned into goal pressure set in advance, after the control, the ratio between high pressure and low pressure of refrigerant i.e. pressure ratio are controlled in a manner of as the operation point for making the efficiency of compressor be improved than current efficiency.Thus, air conditioner controller can reduce the consumption electric power of compressor, and compressor more efficiency is operated well.
Description
Technical field
The present invention relates to the control device of air-conditioning system, air-conditioning system, the control program of air-conditioning system and air-conditioning system
Control method.
Background technology
For example, be just connected with the i.e. so-called multi-connected air conditioning system of air-conditioning system of more indoor sets in an outdoor unit and
Speech, carry out unrelated with indoor load and make the operating pressure of refrigerant constant and ensure the respective load phase with multiple indoor sets
The such control (hereinafter referred to as " pressure constant control ") of necessary ability answered.
Here, Patent Document 1 discloses following air-conditioning system：Supplied as reducing compressor operation efficiency
The kind of refrigeration cycle of air conditioning capacity corresponding with required running capacity, possesses spray circuits, and one end of the spray circuits is connected to
Between expansion valve and indoor heat converter, the other end is connected to compressor, if the rotating speed of compressor is in compressor performance curves
In downward gradient the range of speeds in, then to compressor gas injection refrigerant, if the rotating speed of compressor is in compressor
In the range of speeds of rising gradient in energy curve, then not to compressor gas injection refrigerant.
Moreover, being directed to pressure constant control, also carry out the reduction with indoor load sometimes and adjust the control of goal pressure
Make (hereinafter referred to as " Energy Saving Control ").The situation that the indoor load reduces refers to indoor inlet temperature close to the situation of design temperature
Deng.Also, the adjustment of goal pressure is carried out by controlling the rotating speed of compressor, such as target low-pressure pressure is improved in refrigeration
Power, target high-pressure pressure is reduced to suppress necessary ability in heating.Thereby, it is possible to realize that the consumption electric power of compressor subtracts
It is few.
Citation
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2013-119957 publications
The content of the invention
The invention problem to be solved
However, it is necessary to spray circuits in the air-conditioning system disclosed in patent document 1, therefore the construction of refrigerant loop
Complicate.
In addition, in Energy Saving Control, sometimes because of adjustment goal pressure from the good operating of the efficiency for compressor
The operation point operating compressor that point offset by.
The present invention be in view of such situation and make, its object is to provide that the consumption electric power of compressor can be reduced
And make the control device of the air-conditioning system that compressor more efficiency operates well, air-conditioning system, the control program of air-conditioning system
And the control method of air-conditioning system.
For solving the scheme of problem
In order to solve above-mentioned problem, the control device of air-conditioning system of the invention, air-conditioning system, the control journey of air-conditioning system
The control method of sequence and air-conditioning system uses following scheme.
The control device of the air-conditioning system of the first scheme of the present invention possesses：Pressure control mechanism, it is so that refrigerant
Operating pressure controls the rotating speed of compressor as the mode of goal pressure set in advance；With pressure ratio controlling organization, it is in institute
After stating the control that pressure control mechanism is carried out, with as making the efficiency of the compressor than operation point that current efficiency improves
Mode, control the ratio between high pressure and low pressure of refrigerant i.e. pressure ratio.
The control device of the air-conditioning system of this composition for example carries out the operating pressure for independently making refrigerant with indoor load
Constant control.
Also, pressure control mechanism is controlled in a manner of the operating pressure of refrigerant is turned into goal pressure set in advance
The rotating speed of compressor.Thereby, it is possible to realize the reduction of consumption electric power.
However, the control carried out by pressure control mechanism, sometimes from the good operating of the efficiency for compressor
The operation point operating compressor that point offset by.
Therefore, after the control that pressure control mechanism is carried out, pressure ratio controlling organization is with as making the effect of compressor
Rate controls the ratio between high pressure and low pressure of refrigerant i.e. pressure ratio than the mode for the operation point that current efficiency improves.
Thus, originally it is configured to reduce the consumption electric power of compressor, and compressor more efficiency is operated well.
Or, the pressure control mechanism is so that the operating pressure turns into the mesh in above-mentioned first scheme
The mode of mark pressure reduces the rotating speed of the compressor.
According to this composition, the ability of air-conditioning system is inhibited, and the consumption electric power of air-conditioning system is further reduced.
Or, the pressure ratio controlling organization is not changing the rotating speed of the compressor in above-mentioned first scheme
In the case of control the pressure ratio.
According to this composition, do not make compressor rotation speed change, i.e. without the control for compressor in the case of control
Pressing pressure ratio, easily become the operation point of compressor and turn to desired value.
Or, the pressure ratio controlling organization is arranged at the wind of outdoor unit by control in above-mentioned first scheme
The rotating speed of fan controls the pressure ratio.
According to this composition, become simply the operation point of compressor and turn to desired value.
Or, the pressure ratio controlling organization is arranged at the swollen of outdoor unit by control in above-mentioned first scheme
The aperture of swollen valve controls the pressure ratio.
According to this composition, become simply the operation point of compressor and turn to desired value.
The air-conditioning system of the alternative plan of the present invention possesses the control device of outdoor unit, indoor set and above-mentioned record.
The control program of the air-conditioning system of the third program of the present invention is used to make computer as pressure control mechanism and pressure
Power plays function than controlling organization, and the pressure control mechanism is so that the operating pressure of refrigerant turns into target set in advance
The mode of pressure controls the rotating speed of compressor, the control that the pressure ratio controlling organization is carried out in the pressure control mechanism it
Afterwards, in a manner of as the operation point for making the efficiency of the compressor be improved than current efficiency, control the high pressure of refrigerant with it is low
The ratio between pressure i.e. pressure ratio.
The control method of the air-conditioning system of the fourth program of the present invention has：First process, in first process, so that
The operating pressure of refrigerant controls the rotating speed of compressor as the mode of goal pressure set in advance；With the second process, in institute
After stating the control that the first process is carried out, in second process, with as making the efficiency of the compressor than current efficiency
The mode of the operation point of raising, control the ratio between high pressure and low pressure of refrigerant i.e. pressure ratio.
Invention effect
According to the present invention, there is the consumption electric power that can reduce compressor and compressor more efficiency is operated well
Such excellent effect.
Brief description of the drawings
Fig. 1 is the refrigerant loop figure of the multi-connected air conditioning system of embodiments of the present invention.
Fig. 2 is the block diagram of the electric structure for the air conditioner controller for representing embodiments of the present invention.
Fig. 3 is the efficiency mapping of the compressor of embodiments of the present invention.
Fig. 4 is the flow chart of the flow for the high efficiency control process for representing embodiments of the present invention.
Fig. 5 is the efficiency mapping of the compressor of embodiments of the present invention.
Embodiment
Hereinafter, it is explained with reference to the control of the control device, air-conditioning system, air-conditioning system of the air-conditioning system of the present invention
One embodiment of the control method of program and air-conditioning system.
Fig. 1 shows the multi-connected air conditioner that more indoor sets are connected with an outdoor unit of embodiments of the present invention
The refrigerant loop figure of system.
Multi-connected air conditioning system 1 is the air-conditioning system for being connected with more indoor sets 3A, 3B side by side on an outdoor unit 2.
More indoor sets 3A, 3B are mutual simultaneously via splitter 6 between the gas side line 4 and liquid side line 5 being connected with outdoor unit 2
The connection of row ground.
Outdoor unit 2 possesses：The compressor 10 of Driven by inverter, it is compressed to refrigerant；Four-way switching valve 12, its is right
The loop direction of refrigerant switches over；Outdoor heat converter 13, it makes refrigerant carry out heat exchange with extraneous gas；Supercooling
Coil 14, it is integrally formed with outdoor heat converter 13；Outdoor expansion valve (EEVH) 15；Accumulator tank 16, its storing liquid system
Cryogen；Supercooling heat exchanger 17, it applies supercooling to liquid refrigerant；Supercooling expansion valve (EEVSC) 18, it is controlled
The refrigerant amount shunted to supercooling heat exchanger 17；Reservoir 19, it is separated from the refrigerant gas sucked to compressor 10
Go out liquid parts, and gaseous composition is sucked to the side of compressor 10；Gas side operation valve 20；And hydraulic fluid side operation valve 21.
Above-mentioned each equipment of the side of outdoor unit 2 is sequentially connected via refrigerant piping 22, and outside known to composition is freezed
Agent loop 23.In addition, the outdoor fan 24 of the oriented conveying of outdoor heat converter 13 extraneous gas is set in outdoor unit 2.
Gas side line 4 and liquid side line 5 are the gas side operation valve 20 and hydraulic fluid side operation valve with outdoor unit 2
The refrigerant pipings of 21 connections, during installation at the scene, according to outdoor unit 2 and more interiors for being connected to the outdoor unit 2
The distance between machine 3A, 3B suitably set its piping length.Set in the midway of gas side line 4 and liquid side line 5
There are multiple splitters 6, indoor set 3A, 3B of appropriate number of units are connected via the splitter 6.Thus, forming closed one is
The kind of refrigeration cycle (refrigerant loop) 7 of system.
Indoor set 3A, 3B possess：Make room air and refrigerant heat exchange and cooled down or heated for interior
The indoor heat converter 30 of air adjustment；Indoor expansion valve (EEVC) 31；Room air is set to be circulated via indoor heat converter 30
Indoor fan 32；And indoor controller 33, indoor set 3A, 3B via indoor branched gases side line 4A, 4B and
Branch fluid side line 5A, 5B and be connected with splitter 6.
In above-mentioned multi-connected air conditioning system 1, cooling operation is carried out in the following manner.
The refrigerant gas for the HTHP for being compressed and being discharged from compressor 10 is by four-way switching valve 12 and warm to outdoor
The side of exchanger 13 circulate, in outdoor heat converter 13 with sent by outdoor fan 24 extraneous gas progress heat exchange and it is cold
Lime set.The liquid refrigerant be further cooled at supercooling coil 14 after by outdoor expansion valve 15, temporarily storage
In in accumulator tank 16.
The liquid refrigerant after internal circulating load is have adjusted by accumulator tank 16 via supercooling heat exchanger 17 and in liquid system
A part is distributed from liquid refrigerant pipe arrangement during cryogen pipe arrangement effluent is logical, with being carried out by supercooling with expansion valve 18
Refrigerant heat exchange after adiabatic expansion and be applied in degree of subcooling.The liquid refrigerant via hydraulic fluid side operation valve 21 and by from
Outdoor unit 2 guides to liquid side line 5, via splitter 6 to each indoor set 3A, 3B 5A, 5B points of branch fluid side line
Stream.
The liquid refrigerant for branching to branch fluid side line 5A, 5B flows into each indoor set 3A, 3B, by indoor expansion valve 31
Adiabatic expansion is carried out, turns into gas-liquid two-phase flow and inflow indoor heat exchanger 30.Indoors in heat exchanger 30, by indoor wind
The room air fanned 32 and circulated carries out heat exchange with refrigerant, and room air is cooled and is used for indoor refrigeration.The opposing party
Face, refrigerant are gasified, and splitter 6 is reached via branched gases side line 4A, 4B, with the refrigerant from other indoor sets
Gas converges in gas side line 4.
The refrigerant gas converged in gas side line 4 again returns to outdoor unit 2, via gas side operation valve 20, four
Direction changeover valve 12 and after converging with the refrigerant gas from supercooling heat exchanger 17, be imported into reservoir 19.In liquid storage
In device 19, the liquid parts included in refrigerant gas are separated and only gaseous composition is sucked by compressor 10.The refrigerant
It is re-compressed in compressor 10, the circulation of the above is repeated and carries out cooling operation.
On the other hand, heating runs through in the following manner progress.
Compressed from compressor 10 and the refrigerant gas of HTHP after discharging is via four-way switching valve 12 and to gas
Circulate the side of side operation valve 20.The high-pressure gas refrigerant is led via gas side operation valve 20, gas side line 4 from outdoor unit 2
Go out, via splitter 6, indoor branched gases side line 4A, 4B and be imported into more indoor sets 3A, 3B.
Be imported into the refrigerant gas of indoor set 3A, 3B HTHP indoors in heat exchanger 30 with via indoor wind
The room air of the circulation of fan 32 carries out heat exchange, and thus, the room air after heating is used to heat to indoor blowout.It is another
Aspect, by the refrigerant after the condensation liquefaction of indoor heat converter 30 via indoor expansion valve 31, branch fluid side line 5A, 5B and
Splitter 6 is reached, converges with the refrigerant from other indoor sets, outdoor unit 2 is returned via liquid side line 5.Need
It is bright, in heating, indoors in machine 3A, 3B, the aperture of indoor expansion valve 31 is controlled via indoor controller 33, so as to make
The refrigerant exit temperature or refrigerant degree of subcooling that the indoor heat converter 30 of function is played for condenser turn into control targe
Value.
The refrigerant for returning to outdoor unit 2 reaches supercooling heat exchanger 17 via hydraulic fluid side operation valve 21, with system
Situation when cold flows into accumulator tank 16 after being similarly applied in supercooling, and internal circulating load is adjusted by temporarily storing.The liquid
Refrigerant is supplied to outdoor expansion valve 15 and is adiabatic after expansion, the inflow outdoor heat exchanger via supercooling coil 14
13。
In outdoor heat converter 13, extraneous gas and the refrigerant sent from outdoor fan 24 carry out heat exchange, refrigeration
Agent is absorbed heat and is evaporated from extraneous gas.The refrigerant is from outdoor heat converter 13 via four-way switching valve 12 and with coming
From after converging the refrigerant gas of supercooling heat exchanger 17, reservoir 19 is imported into.In reservoir 19, refrigerant gas
Included in liquid parts be separated and only gaseous composition is sucked by compressor 10, be re-compressed in compressor 10.It is logical
Cross the circulation that the above is repeated and carry out heating operating.
Fig. 2 is the electricity for representing to serve as the air conditioner controller 40 of the control of the multi-connected air conditioning system 1 of present embodiment
The block diagram of structure.It should be noted that in fig. 2 it is shown that the pressure constant control and pressure that are seen below with details
The related function than control.
Air conditioner controller 40 is for example by CPU (Central Processing Unit), RAM (Random Access
Memory), ROM (Read Only Memory) and computer-readable storage medium etc. are formed.It is also, each for realizing
A series of processing of kind function are stored in storage medium etc. as one in the form of program, and the program is read RAM by CPU
Deng the simultaneously processing of execution information, calculation process, various functions are achieved in.It should be noted that program can also be applied in advance
Be installed on ROM, other storage mediums form, by be stored in computer-readable storage medium state provide in the form of,
Form transmitted via wired or wireless communication agency etc..Computer-readable storage medium refer to disk, photomagneto disk,
CD-ROM, DVD-ROM, semiconductor memory etc..In addition, air conditioner controller 40 is provided to outdoor unit 2.
Air conditioner controller 40 possesses pressure control portion 42, pressure ratio control unit 44 and storage part 46.
Pressure control portion 42 carries out independently making the constant pressure of the operating pressure of refrigerant with indoor load as one
Power constant control.The control in a manner of the operating pressure to make refrigerant turns into goal pressure set in advance of pressure constant control
The rotating speed of compressor 10 processed, to ensure the necessary ability of compressor 10.
More specifically, in pressure constant control, when the initial speed of compressor 10 is determined, held according to type
The set target pressures such as amount, rotating speed (operating frequency), and refrigeration when by pressure sensor detect suction pressure (low pressure) Lai
As detected pressure value, detected pressure value is used as by pressure sensor detection discharge pressure (high pressure) in heating.Also, press
Power constant control to the goal pressure compared with detected pressure value, to control the rotating speed of compressor 10.Specifically, pressure
Constant control in the case of goal pressure ＞ detected pressure values, makes the rotating speed of compressor 10 reduce, in target pressure in refrigeration
In the case of power ＜ detected pressure values, the rotating speed of compressor 10 is set to increase.On the other hand, pressure constant control is in heating,
In the case of goal pressure ＞ detected pressure values, the rotating speed of compressor 10 is set to increase, in the feelings of goal pressure ＜ detected pressure values
Under condition, decline the rotating speed of compressor 10.Also, in the case of goal pressure=detected pressure value, make turning for compressor 10
Speed is constant, and thus in refrigeration, suction pressure is constant, and in heating, discharge pressure is constant.
After the control of pressure control portion 42, pressure ratio control unit 44 is so that as making, the efficiency ratio of compressor 10 is current to imitate
The mode for the operation point that rate improves, controls the ratio between high pressure and low pressure of refrigerant i.e. pressure ratio (high voltage/low voltage) (hereinafter referred to as
" pressure ratio control ").
Storage part 46 is to representing the efficiency distribution of compressor 10 according to obtained from the rotating speed and pressure ratio of compressor 10
Compressor efficiency distributed intelligence is stored.
Fig. 3 be represent compressor efficiency distributed intelligence the efficiency of one mapping, transverse axis be compressor 10 rotating speed, the longitudinal axis
For pressure ratio, the efficiency solid line of compressor 10 shows in contour wire earth's surface.That is, more in the big of the efficiency mapping shown in Fig. 3
Causing central (inner side of contour), then the efficiency of compressor 10 is higher.It should be noted that compressor efficiency distributed intelligence is unlimited
The efficiency as Fig. 3 maps, and can also be stored in storage part 46 with function, sheet form etc..
Then, the pressure constant control performed by the air conditioner controller 40 of present embodiment and pressure are described in detail
Than control.It should be noted that in the following description, pressure constant control and pressure ratio control are referred to as high efficiency
Control.
Pressure constant control independently makes the operating pressure of refrigerant constant as described above, with indoor load.Moreover,
In the pressure constant control of present embodiment, such as indoors in the case of load reduction, so that the pressure of refrigerant turns into
The mode of goal pressure after new adjustment reduces the rotating speed of compressor 10, thus carries out what the ability of compressor 10 was suppressed
Energy Saving Control.
The reduction of indoor load refers to indoor inlet temperature and design temperature close to the situation in prescribed limit.In such as this reality
Apply mode multi-connected air conditioning system 1 be connected with multiple indoor sets 3 like that in the case of, such as in indoor set 3 more than half
Indoor inlet temperature and design temperature difference be 1 DEG C within the case of, it is believed that be that indoor load reduces.
Also, pressure control portion 42 refrigeration when indoor load reduce in the case of, by improving current goal pressure
(target low-pressure) reduces the rotating speed of compressor 10.On the other hand, in the case that in heating, indoor load reduces, Stress control
Portion 42 reduces the rotating speed of compressor 10 by reducing current goal pressure (target high-pressure).
It should be noted that goal pressure is periodically adjusted, indoor inlet temperature is detected with setting during adjustment every time
Determine temperature difference.If also, the difference becomes big, the ability of compressor 10 becomes insufficient relative to indoor load, therefore target
The adjustment of pressure terminates.
Reference picture 3, illustrate to have carried out the change of the operation point of compressor 10 in the case of the Energy Saving Control of present embodiment
Change.
When being before goal pressure is adjusted as the operation point shown in point A, carrying out the usual control before Energy Saving Control
Operation point.Also, point B is to carry out the operation point after Energy Saving Control.
However, the operation point B of Energy Saving Control is not necessarily the operation point that efficiency is good for compressor 10.In Fig. 3 example
In son, even turning into efficiency with operation point B identical rotating speeds, and the region (such as including point C region) that pressure ratio is high
More preferably operation point.
Therefore, control to improve than current efficiency as the efficiency for making compressor 10 by the pressure ratio of present embodiment
The mode control pressure ratio of operation point (being in the example in figure 3 point C, hereinafter referred to as " efficiency optimum operation point ").
The adjustment of the operation point of compressor 10 when table 1 shows refrigeration and during heating.
[table 1]
As shown in table 1, in refrigeration, pressure ratio control is carried out by controlling high pressure, is saved by controlling low pressure
Can control.On the other hand, in heating, Energy Saving Control is carried out by controlling high pressure, pressure ratio is carried out by controlling low pressure
Control.So, when in refrigeration with heating, the control purpose of the high pressure of refrigerant is different from the control purpose of low pressure.
Also, the pressure ratio control unit 44 of present embodiment as one and by make the rotation speed change of outdoor fan 24 come
Carry out pressure ratio control.
Specifically, in the case that the pressure ratio after Energy Saving Control is less than efficiency optimum operation point, outdoor fan 24 is made
Rotating speed reduce.Thus, in refrigeration, the high pressure of refrigerant rises, and on the other hand, in heating, the low pressure of refrigerant declines.Cause
This, pressure ratio rises, and operation point is close to efficiency optimum operation point.
On the other hand, in the case that the pressure ratio after Energy Saving Control is higher than efficiency optimum operation point, outdoor fan 24 is made
Rotating speed rise.Thus, refrigeration when refrigerant high drops, on the other hand, in heating refrigerant low pressure rise.Cause
This, pressure ratio declines, and operation point is close to efficiency optimum operation point.
So, pressure ratio control carries out pressure ratio control in the case where not changing the rotating speed of compressor 10.That is, pressure ratio
Control control pressure ratio in the case of without the control for compressor 10, easily make the operation point of compressor 10 to institute's phase
The value changes of prestige.
In addition, for efficiency optimum operation point, such as can also be redefined for turning into relative to the rotating speed of compressor 10
The pressure ratio of optimum efficiency, and there is a certain degree of width on the increase and decrease direction of pressure ratio.
Fig. 4 is the flow chart of the flow of high efficiency control process for representing to be performed by air conditioner controller 40, is used for
The program (high efficiency control program) for performing present treatment is pre-stored within the predetermined region of storage part 46.It should be noted that
Before high efficiency control process is carried out, air conditioner controller 40 be not accompanied by the pressure constant control of Energy Saving Control
(generally control).
First, in step 100, judge whether indoor load has been lowered to the degree that can start Energy Saving Control, agreeing
Shifted in the case of fixed judgement to step 102.In the case where negating to judge, continue generally to control.
In a step 102, it is set as terminating generally to control and start Energy Saving Control.
In following step 104, goal pressure is adjusted in order to carry out Energy Saving Control.It should be noted that making
Goal pressure (target low-pressure) is improved when cold, goal pressure (target high-pressure) is reduced in heating.
In following step 106, judge whether operating pressure and the goal pressure after adjustment are consistent, judging certainly
In the case of shifted to step 110, on the other hand, shifted in the case where negating to judge to step 108.
In step 108, the rotating speed of compressor 10 is controlled in a manner of making operating pressure consistent with goal pressure, returns to step
Rapid 106, to operating pressure compared with the goal pressure after adjustment.
Specifically, in the case that in refrigeration, low-pressure ratio target low-pressure is low, or high pressure ratio target high-pressure is high in heating
In the case of, the rotating speed of reduction compressor 10.On the other hand, in refrigeration in the case of low-pressure ratio target low-pressure height, or making
In the case that high pressure ratio target high-pressure is low when warm, the rotating speed of compressor 10 is improved.
In step 110, efficiency optimum operation point corresponding with the rotating speed of compressor 10 is set.
In following step 112, judge whether actual pressure ratio is consistent with the pressure ratio of efficiency optimum operation point,
Shifted in the case where negating to judge to step 114.The return to step 106 in the case where judging certainly, repeatedly continues
Energy Saving Control and pressure ratio control.
In step 114, the control room in a manner of making actual pressure ratio consistent with the pressure ratio of efficiency optimum operation point
The rotating speed of external fan 24, again returns to step 112, and the pressure ratio of the pressure ratio and efficiency optimum operation point of reality is compared
Compared with.
Specifically, in the case of pressure ratio of the pressure ratio of reality less than efficiency optimum operation point, outdoor wind is reduced
The rotating speed of fan 24.Thus, high pressure is improved in refrigeration, low pressure is reduced in heating, actual pressure ratio rises.On the other hand,
In the case of pressure ratio of the pressure ratio of reality higher than efficiency optimum operation point, the rotating speed of outdoor fan 24 is improved.Thus, exist
High pressure is reduced during refrigeration, low pressure is improved in heating, actual pressure ratio declines.
It is as discussed above, the air conditioner controller 40 of present embodiment so that refrigerant operating pressure into
The rotating speed of compressor 10 is controlled for the mode of goal pressure set in advance, after the control, with as making compressor 10
Efficiency controls the ratio between high pressure and low pressure of refrigerant i.e. pressure ratio than the mode of operation point that current efficiency improves.
Thus, air conditioner controller 40 can reduce the consumption electric power of compressor 10 and make the efficiency of compressor 10 better
Operate well.
More than, the present invention is illustrated using above-mentioned embodiment, but the technical scope of the present invention is not limited to above-mentioned reality
Apply the scope described in mode.Can in the range of the purport of invention is not departed to above-mentioned embodiment apply numerous variations or
Improvement, the embodiment for being applied with the change or improvement are also contained in technical scope of the invention.Alternatively, it is also possible to appropriately combined
Above-mentioned embodiment.
For example, in the above-described embodiment, illustrate to control the reality of the rotating speed of outdoor fan 24 for control pressure ratio
Mode is applied, but the present invention is not limited to this, can also use and control the aperture of outdoor expansion valve 15 for control pressure ratio
Embodiment.
In the case of this embodiment, in above-mentioned step 114, it is less than efficiency optimum operation in the pressure ratio of reality
In the case of the pressure ratio of point, outdoor expansion valve 15 is turned down.Thus, high pressure is improved in refrigeration, low pressure is reduced in heating, it is real
The pressure ratio on border rises.On the other hand, in the case of pressure ratio of the pressure ratio of reality higher than efficiency optimum operation point, open big
Outdoor expansion valve 15.Thus, high pressure is reduced in refrigeration, low pressure is improved in heating, actual pressure ratio declines.
In addition, for control pressure ratio, can also control outdoor fan 24 rotating speed and outdoor expansion valve 15 aperture this
Two sides.
The multiple refrigeration for possessing choke valve and magnetic valve respectively are set up in parallel alternatively, it is also possible to replace outdoor expansion valve 15
Agent loop, the stream of refrigerant is changed so that amount of restriction changes by the opening and closing of magnetic valve, thus control pressure ratio.
Furthermore, it is also possible to make outdoor heat converter 13 be multiple, make the number of the outdoor heat converter 13 for refrigerant circulation
(capacity) change is measured, thus control pressure ratio.
In addition, in the above-described embodiment, illustrate to carry out the embodiment of pressure ratio control after Energy Saving Control is carried out,
But the present invention is not limited to this, the embodiment party that pressure ratio control is carried out in the case of without Energy Saving Control can also be used
Formula.
Or, as shown in the example of figure 5, (operated in usual control in the case of using the embodiment
Point A) after, carry out pressure ratio control in a manner of the operation point for making compressor 10 turns into efficiency more preferably operation point C.
In addition, in the above-described embodiment, illustrate that air conditioner controller 40 carries out independently making system with indoor load
The embodiment of the constant pressure constant control of the operating pressure of cryogen, but the present invention is not limited to this, can also use
The embodiment of Energy Saving Control is carried out in the case of without pressure constant control.
In addition, in the above-described embodiment, illustrate to carry out the implementation of Energy Saving Control in the case of load reduction indoors
Mode, but the present invention is not limited to this, or such a way：More than indoors in the case of load reduction,
Such as change, the reduction of rotating speed of such as compressor 10 that the user (manager) of multi-connected air conditioning system 1 is set are set
In the case of change setting of fixed, refrigerant goal pressure etc., Energy Saving Control is also carried out.
, can also be in addition, the flow of illustrated high efficiency control process is also one in the above-described embodiment
Do not depart from and delete unwanted step, additional new step in the range of the purport of the present invention or change processing sequence.
Description of reference numerals
1 multi-connected air conditioning system
2 outdoor units
3A, 3B indoor set
10 compressors
15 outdoor expansion valves
24 outdoor fans
40 air conditioner controllers
42 pressure control portions
44 pressure ratio control units
Claims (according to the 19th article of modification of treaty)
1. a kind of control device of air-conditioning system (after modification), wherein,
The control device of the air-conditioning system possesses：
Pressure control mechanism, it controls compressor in a manner of the operating pressure of refrigerant is turned into goal pressure set in advance
Rotating speed；And
Pressure ratio controlling organization, it is after the control that the pressure control mechanism is carried out, with as making the compressor
Efficiency controls the ratio between high pressure and low pressure of refrigerant i.e. pressure ratio than the mode of operation point that current efficiency improves,
In refrigeration, the pressure ratio controlling organization controls the high pressure of refrigerant and the pressure control mechanism controls refrigerant
Low pressure, in heating, the high pressure and pressure ratio controlling organization control refrigerant of the pressure control mechanism control refrigerant
Low pressure.
2. the control device of air-conditioning system according to claim 1, wherein,
The pressure control mechanism reduces turning for the compressor in a manner of the operating pressure is turned into the goal pressure
Speed.
3. the control device of air-conditioning system according to claim 1 or 2, wherein,
The pressure ratio controlling organization controls the pressure ratio in the case where not changing the rotating speed of the compressor.
4. the control device of air-conditioning system according to any one of claim 1 to 3, wherein,
The pressure ratio controlling organization controls the pressure ratio by controlling the rotating speed for the fan for being arranged at outdoor unit.
5. the control device of air-conditioning system according to any one of claim 1 to 4, wherein,
The pressure ratio controlling organization controls the pressure ratio by controlling the aperture for the expansion valve for being arranged at outdoor unit.
6. a kind of air-conditioning system, wherein,
The air-conditioning system possesses：
Outdoor unit；
Indoor set；And
Control device any one of claim 1 to 5.
7. a kind of control program of air-conditioning system (after modification), wherein,
The control program of the air-conditioning system is used to make computer as pressure control mechanism and pressure ratio controlling organization to play
Function,
The pressure control mechanism controls compression in a manner of the operating pressure of refrigerant is turned into goal pressure set in advance
The rotating speed of machine,
The pressure ratio controlling organization is after the control that the pressure control mechanism is carried out, with as making the compressor
Efficiency controls the ratio between high pressure and low pressure of refrigerant i.e. pressure ratio than the mode of operation point that current efficiency improves,
In refrigeration, the pressure ratio controlling organization controls the high pressure of refrigerant and the pressure control mechanism controls refrigerant
Low pressure, in heating, the high pressure and pressure ratio controlling organization control refrigerant of the pressure control mechanism control refrigerant
Low pressure.
8. a kind of control method of air-conditioning system (after modification), wherein,
The control method of the air-conditioning system has：
First process, in first process, in a manner of the operating pressure for making refrigerant turns into goal pressure set in advance
Control the rotating speed of compressor；And
Second process, after the control that first process is carried out, in second process, with as making the compressor
Efficiency than the mode of operation point that current efficiency improves, control the ratio between high pressure and low pressure of refrigerant i.e. pressure ratio,
In refrigeration, the high pressure of the second process control refrigerant and the low pressure of first process control refrigerant, making
When warm, the high pressure of the first process control refrigerant and the low pressure of second process control refrigerant.
Claims (8)
1. a kind of control device of air-conditioning system, wherein,
The control device of the air-conditioning system possesses：
Pressure control mechanism, it controls compressor in a manner of the operating pressure of refrigerant is turned into goal pressure set in advance
Rotating speed；And
Pressure ratio controlling organization, it is after the control that the pressure control mechanism is carried out, with as making the compressor
Efficiency controls the ratio between high pressure and low pressure of refrigerant i.e. pressure ratio than the mode of operation point that current efficiency improves.
2. the control device of air-conditioning system according to claim 1, wherein,
The pressure control mechanism reduces turning for the compressor in a manner of the operating pressure is turned into the goal pressure
Speed.
3. the control device of air-conditioning system according to claim 1 or 2, wherein,
The pressure ratio controlling organization controls the pressure ratio in the case where not changing the rotating speed of the compressor.
4. the control device of air-conditioning system according to any one of claim 1 to 3, wherein,
The pressure ratio controlling organization controls the pressure ratio by controlling the rotating speed for the fan for being arranged at outdoor unit.
5. the control device of air-conditioning system according to any one of claim 1 to 4, wherein,
The pressure ratio controlling organization controls the pressure ratio by controlling the aperture for the expansion valve for being arranged at outdoor unit.
6. a kind of air-conditioning system, wherein,
The air-conditioning system possesses：
Outdoor unit；
Indoor set；And
Control device any one of claim 1 to 5.
7. a kind of control program of air-conditioning system, wherein,
The control program of the air-conditioning system is used to make computer as pressure control mechanism and pressure ratio controlling organization to play
Function,
The pressure control mechanism controls compression in a manner of the operating pressure of refrigerant is turned into goal pressure set in advance
The rotating speed of machine,
The pressure ratio controlling organization is after the control that the pressure control mechanism is carried out, with as making the compressor
Efficiency controls the ratio between high pressure and low pressure of refrigerant i.e. pressure ratio than the mode of operation point that current efficiency improves.
8. a kind of control method of air-conditioning system, wherein,
The control method of the air-conditioning system has：
First process, in first process, in a manner of the operating pressure for making refrigerant turns into goal pressure set in advance
Control the rotating speed of compressor；And
Second process, after the control that first process is carried out, in second process, with as making the compressor
Efficiency than the mode of operation point that current efficiency improves, control the ratio between high pressure and low pressure of refrigerant i.e. pressure ratio.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-064074 | 2015-03-26 | ||
| JP2015064074A JP6495064B2 (en) | 2015-03-26 | 2015-03-26 | Air conditioning system control device, air conditioning system, air conditioning system control program, and air conditioning system control method |
| PCT/JP2016/057550 WO2016152552A1 (en) | 2015-03-26 | 2016-03-10 | Air conditioning system control device, air conditioning system, air conditioning control program, and air conditioning system control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107614984A true CN107614984A (en) | 2018-01-19 |
Family
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| CN201680017419.5A Pending CN107614984A (en) | 2015-03-26 | 2016-03-10 | The control device of air-conditioning system, air-conditioning system, the control method of the control program of air-conditioning system and air-conditioning system |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3260792B1 (en) |
| JP (1) | JP6495064B2 (en) |
| CN (1) | CN107614984A (en) |
| ES (1) | ES2745753T3 (en) |
| WO (1) | WO2016152552A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022156632A1 (en) * | 2021-01-21 | 2022-07-28 | 广东美的暖通设备有限公司 | Method for detecting power consumption of multi-split air conditioner, heat recovery multi-split air conditioner, storage medium, and device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2018179370A (en) * | 2017-04-10 | 2018-11-15 | 日立ジョンソンコントロールズ空調株式会社 | Freezer unit |
| JP7208063B2 (en) * | 2019-03-05 | 2023-01-18 | 三菱重工サーマルシステムズ株式会社 | transportation refrigeration machinery |
| CN111076350B (en) * | 2019-12-30 | 2021-09-21 | 宁波奥克斯电气股份有限公司 | Control method and device for starting compressor and air conditioner |
| CN113446706B (en) * | 2020-03-25 | 2022-08-19 | 青岛海尔空调电子有限公司 | Air conditioner control method and air conditioner |
| CN111895627B (en) * | 2020-07-14 | 2022-01-04 | Tcl空调器(中山)有限公司 | Air conditioner outdoor fan rotating speed control method, air conditioner and storage medium |
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- 2016-03-10 ES ES16768455T patent/ES2745753T3/en active Active
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| CN1181484A (en) * | 1996-10-31 | 1998-05-13 | 东芝株式会社 | Air conditioner |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3260792A1 (en) | 2017-12-27 |
| ES2745753T3 (en) | 2020-03-03 |
| JP2016183817A (en) | 2016-10-20 |
| WO2016152552A1 (en) | 2016-09-29 |
| EP3260792A4 (en) | 2018-03-14 |
| JP6495064B2 (en) | 2019-04-03 |
| EP3260792B1 (en) | 2019-07-31 |
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