CN105972717B - Multi-split air conditioning system and control method thereof - Google Patents
Multi-split air conditioning system and control method thereof Download PDFInfo
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- CN105972717B CN105972717B CN201610311178.7A CN201610311178A CN105972717B CN 105972717 B CN105972717 B CN 105972717B CN 201610311178 A CN201610311178 A CN 201610311178A CN 105972717 B CN105972717 B CN 105972717B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 55
- 238000005057 refrigeration Methods 0.000 claims description 14
- 238000004781 supercooling Methods 0.000 claims description 12
- 238000005485 electric heating Methods 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 28
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 39
- 239000007788 liquid Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 7
- 238000012546 transfer Methods 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000004087 circulation Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 206010008469 Chest discomfort Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012913 prioritisation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
-
- 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
- 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
- F24F11/62—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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention provides a multi-split air conditioning system which comprises a compressor (1), an outdoor heat exchanger (2), an indoor heat exchanger (3), a four-way valve (4), an air distributor (5), a subcooler (6) and a subcooling expansion valve (15), wherein a first branch (7) and a second branch (8) are connected and arranged between a low-pressure pipeline and a high-pressure pipeline of the subcooler (6) in a parallel connection mode, the first branch (7) is arranged in a mode of penetrating through the inside of the air distributor (5), a heat exchange device (9) is arranged in the air distributor (5), and the multi-split air conditioning system further comprises a control device for controlling one of the first branch (7) and the second branch (8) to be connected and the other to be disconnected. The invention can solve the technical problem of poor heat exchange effect under the condition of low outdoor environment temperature, effectively improves the heating efficiency of the system, particularly in low-temperature environment, enhances the heat exchange effect and improves the energy utilization rate. The invention also relates to a control method of the multi-split air conditioning system.
Description
Technical field
The invention belongs to air-conditionings and heat pump system technical field, and in particular to a kind of multi-online air-conditioning system and its controlling party
Method.
Background technology
Currently, the domestic outer machine product of multi-connected machine big absolutely, it is common to use common frequency conversion high pressure chest screw compressor, that is, use
Non- increasing enthalpy Scroll Inverter Compressor, compared with spraying enthalpy frequency-changing cyclone compressor, have " with frequency, ability is low, same to ability, and efficiency is low,
High frequency delivery temperature is high, and worst cold case heating capacity is low " the shortcomings that.
Meanwhile country has clearly proposed the requirement of " energy-saving and emission-reduction ", and legalization, institutionalization, and country is related more
Online Energy Efficiency Standard requirement, is improved with day；The high energy efficiency product of air conditioner industry, and continuous update, competition constantly add
Greatly；Therefore, horizontal and extremely urgent to promoting the efficiency of multi-connected machine product.
In addition, the winter heating of cold zone, still uses based on combusts fossil raw material, this not only causes a large amount of environment
Pollution, while also resulting in energy waste.
Due to multi-online air-conditioning system in the prior art that there are energy utilization rates is low, heat transfer effect is undesirable, and
The technical problems such as environmental pollution, therefore research and design of the present invention goes out a kind of multi-online air-conditioning system and its control method.
Invention content
Therefore, the technical problem to be solved in the present invention is that multi-online air-conditioning system in the prior art is overcome to exist especially
The defect that energy utilization rate is low in low temperature environment, heat transfer effect is undesirable, to provide a kind of multi-online air-conditioning system and
Its control method.
The present invention provides a kind of multi-online air-conditioning system comprising compressor, outdoor heat exchanger, indoor heat exchanger, four-way
Valve, qi leel, subcooler and supercooling expansion valve, wherein to be in parallel between the low pressure line and pressure duct of the subcooler
Mode is connected with the first branch and the second branch, and the first branch is arranged in the form of inside qi leel, and inside qi leel
Be provided with heat-exchanger rig, further include control the first branch in the second branch one of connect, the control device of another disconnection.
Preferably, the subcooler in the supercooling expansion valve side is arranged in the first branch and the second branch
Low pressure line and pressure duct between.
Preferably, the control device is the threeway being arranged in the first branch and the second branch phase junction
Valve.
Preferably, the triple valve is arranged in two phase contacts of the first branch and the second branch relatively remote
At position from one of the subcooler.
Preferably, the heat-exchanger rig is arranged in the first branch through at the position inside the qi leel, with right
Refrigerant inside the first branch exchanges heat.
Preferably, the heat-exchanger rig is electric heating wire.
Preferably, the compressor is low-temperature enthalpy-increasing compressor, and in the low tension outlet end also branch of the subcooler
It was connected with cold loop and Gas-supplying enthalpy-increasing pipeline.
Preferably, one end of the cold loop excessively is connected with one end of the Gas-supplying enthalpy-increasing pipeline, the cold loop excessively
The other end is connected on the air inlet pipeline of the qi leel.
Preferably, the other end of the Gas-supplying enthalpy-increasing pipeline is connected to the inside of the compressor.
Preferably, the low temperature valve excessively for controlling its break-make is provided on the cold loop excessively；And/or in the Gas-supplying enthalpy-increasing
The increasing enthalpy valve for controlling its break-make is provided on pipeline.
The present invention also provides a kind of control methods of multi-online air-conditioning system, use multi-online air-conditioning system above-mentioned,
It is in and is controlled to adjust respectively under the different conditions of indoor refrigeration or indoor heating and it is cut between different conditions
Control and regulation are switched over when changing.
Preferably, it when indoor refrigeration, adjusts the control device and makes the first branch disconnection, the second branch
It connects.
Preferably, when the system comprises crossing cold loop, Gas-supplying enthalpy-increasing pipeline, crossing low temperature valve and increasing enthalpy valve, described in control
Low temperature valve is crossed to open to connect the cold loop excessively, control increasing enthalpy valve closing to disconnect the Gas-supplying enthalpy-increasing pipeline.
Preferably, it when indoor heating and outdoor environment temperature are higher than -15 DEG C, adjusts the control device and makes described the
One branch disconnects, the second branch is connected.
Preferably, when the system comprises crossing cold loop, Gas-supplying enthalpy-increasing pipeline, crossing low temperature valve and increasing enthalpy valve, described in control
Low temperature valve is crossed to close to disconnect cold loop, the control increasing enthalpy valve opening crossed to connect the Gas-supplying enthalpy-increasing pipeline.
Preferably, it when indoor heating and outdoor environment temperature are less than -15 DEG C, adjusts the control device and makes described the
One branch is connected, the second branch disconnects.
Preferably, when the system comprises crossing cold loop, Gas-supplying enthalpy-increasing pipeline, crossing low temperature valve and increasing enthalpy valve, described in control
Low temperature valve is crossed to close to disconnect cold loop, the control increasing enthalpy valve opening crossed to connect the Gas-supplying enthalpy-increasing pipeline.
A kind of multi-online air-conditioning system provided by the invention and its control method have the advantages that：
1. multi-online air-conditioning system through the invention coordinates the structure type of intelligent control by using auxiliary heat-exchanging,
The technical problem that system energy utilization rate is low, heat transfer effect is undesirable can be efficiently solved, system is effectively improved and especially exists
Heating efficiency in low temperature environment enhances heat transfer effect, improves energy utilization rate；
2. multi-online air-conditioning system through the invention carries out tonifying Qi by using enthalpy-increasing compressor and cooperation increasing enthalpy channel
The mode of increasing enthalpy can effectively increase compressor air-discharging amount, and the circularly cooling dosage of heat exchanger indoor unit heating increases, real
Existing heating capacity increases, and is more applicable for cold district.
3. multi-online air-conditioning system through the invention and control method, outdoor ring that can effectively residing for system
The actual temp in border and other actual conditions carry out intelligence, accurately and efficiently regulate and control, and effectively realize a variety of different
It realizes under operating status and operating condition and expeditiously exchanges heat, energy utilization rate is greatly improved, and has been improved particularly low temperature
Heating efficiency under environment；
4. the multi-online air-conditioning system and control method of the present invention, the environmental protection of course of work Green will not bring environment dirty
Dye.
Description of the drawings
Fig. 1 is the structural schematic diagram of multi-online air-conditioning system in the prior art；
Fig. 2 is structural schematic diagram of the multi-online air-conditioning system of the present invention under refrigerating state；
Fig. 3 is the multi-online air-conditioning system of the present invention under heating state and outdoor environment temperature is higher than -15 DEG C of structure
Schematic diagram；
Fig. 4 is the multi-online air-conditioning system of the present invention under heating state and outdoor environment temperature is less than -15 DEG C of structure
Schematic diagram.
Reference numeral is expressed as in figure：
1-compressor, 2-outdoor heat exchangers, 3-indoor heat exchangers, 4-four-way valves, 5-qi leels, 6-subcoolers, 7-
The first branch, 8-the second branches, 9-heat-exchanger rigs, 10-triple valves, 11-mistake cold loops, 12-Gas-supplying enthalpy-increasing pipelines,
13-cross low temperature valve, 14-increasing enthalpy valves, 15-supercooling expansion valves.
Specific implementation mode
As in Figure 2-4, the present invention provides a kind of air-conditioning system comprising compressor 1, outdoor heat exchanger 2, indoor heat exchange
Device 3, four-way valve 4, qi leel 5 (i.e. gas-liquid separator), subcooler 6 and supercooling expansion valve 15, wherein in the low pressure of the subcooler 6
The first branch 7 and the second branch 8 are connected between pipeline and pressure duct in a manner of being in parallel, the first branch 7 is to pass through
The form setting inside qi leel 5 is worn, and qi leel 5 is internally provided with heat-exchanger rig 9, further includes the control first branch 7 and second
In road 8 one of connect, the control device of another disconnection.
Multi-online air-conditioning system through the invention, by being arranged in parallel between the low pressure of subcooler, pressure duct
First, second branch, and make the first branch through qi leel and heat-exchanger rig is set in qi leel, it can be to flowing through the first branch
In refrigerant carry out heat exchange effect, and be arranged that control one of first and second branches are logical, another disconnected control device, energy
One of first, second branch of enough selections as needed is connected, to exchange heat according to actual needs to the refrigerant in pipe,
Can solve outdoor environment temperature it is relatively low in the case of the poor technical problem of its heat transfer effect, i.e., coordinate by using auxiliary heat-exchanging
The structure type of intelligent control can control being selectively turned on for two branches, and then need to assist according to actual needs
Make the heat-exchanger rig in refrigerant and qi leel in refrigerant pipe exchange heat when heat exchange, system energy can be efficiently solved
The technical problem that utilization rate is low, heat transfer effect is undesirable effectively improves heating efficiency of the system especially in low temperature environment, increases
Strong heat transfer effect improves energy utilization rate.
Preferably, the mistake in 15 side of the supercooling expansion valve is arranged in the first branch 7 and the second branch 8
Between the low pressure line and pressure duct of cooler 6.The first branch and the second branch are arranged in the supercooling expansion valve side
Between the low pressure line and pressure duct of the subcooler, this is the preferred arrangement form of the first and second branches, can root
It is auxiliary through the refrigerant progress in the low pressure line before expansion valve is subcooled (before carrying out reducing pressure by regulating flow) according to actual needs convection current
The effect of heat exchange is helped, more preferably achievees the purpose that improve heat exchange efficiency, energy saving increasing enthalpy.
Preferably, the control device is the threeway being arranged in 8 phase junction of the first branch 7 and the second branch
Valve 10.By the way that control device to be selected as to the triple valve being arranged in the first and second branch phase junctions, can effectively utilize
The exclusive structure of triple valve, controls three-way connection (pipe) road, effectively realizes incoming pipeline and first branch connection, the second branch
Disconnect, or so that incoming flow pipe road and the second branch are connected, the first branch disconnects, realize in the first, second branch one of connect
The control action of logical, another disconnection.
Preferably, the phase in two phase contacts of the first branch 7 and the second branch 8 is arranged in the triple valve 10
At the position far from one of the subcooler 6, that is, it is arranged in the first branch for being relatively distant from the subcooler 6
7 and the second branch 8 phase junction.This is the more preferably specific installation position of triple valve, in this way can be to incoming pipeline
The effect for switching over guiding at the position of the crosspoint of the first branch and the second branch is flowed through, the refrigerant of direction of flow is led
It flow to the first branch or the second branch.
Preferably, the heat-exchanger rig 9 is arranged in the first branch 7 through at the position inside the qi leel 5, with
It exchanges heat to the refrigerant inside the first branch 7.Heat-exchanger rig is set to inside qi leel and is located at the first branch
At position, can effectively and heat exchange effect fully is carried out to the refrigerant inside the first branch, realize energy saving increasing enthalpy, raising change
The effect of the thermal efficiency.
Preferably, the heat-exchanger rig 9 is electric heating wire.This is the preferred kind and structure type of heat-exchanger rig, will be changed
Thermal is selected as electric heating wire, the effect that can be effectively heated to the refrigerant flowed through in the first branch, effectively
It improves increasing enthalpy effect and improves heat exchange efficiency.
Preferably, the compressor 1 is low-temperature enthalpy-increasing compressor (i.e. EVI compressors), and in the low pressure of the subcooler 6
It was connected with cold loop 11 and Gas-supplying enthalpy-increasing pipeline 12 to outlet end also branch.Compressor is selected as low-temperature enthalpy-increasing compressor
(such as screw compressor, rotary compressor etc.) can effectively increase pressure at expulsion, improve exchange capability of heat and the heat exchange of system
Efficiency, and cold loop and Gas-supplying enthalpy-increasing pipeline were connected in the low tension outlet end branch of subcooler, it can be according to actual needs
Useful effect and the effect for realizing cold reflux or Gas-supplying enthalpy-increasing, are more applicable for cold district.
Preferably, described one end for crossing cold loop 11 is connected with one end of the Gas-supplying enthalpy-increasing pipeline 12, described to be subcooled back
The other end on road 11 is connected on the air inlet pipeline of the qi leel 5.The air inlet pipeline of qi leel is connected to by the way that the cold loop other end will be crossed
On, it can will be drained in qi leel by the refrigerant of subcooler according to actual conditions (the case where not needing Gas-supplying enthalpy-increasing), it is complete
At cycle.
Preferably, the other end of the Gas-supplying enthalpy-increasing pipeline 12 is connected to the inside of the compressor 1.By by Gas-supplying enthalpy-increasing
Pipeline is connected to the mode inside compressor, can effectively realize the effect for pressing increasing enthalpy tonifying Qi in being carried out to compressor, increase pressure
The pressure at expulsion of contracting machine effectively improves the exchange capability of heat and heat exchange efficiency of entire multi-online air-conditioning system.
Preferably, the low temperature valve 13 excessively for controlling its break-make is provided on the cold loop 11 excessively；And/or in the tonifying Qi
The increasing enthalpy valve 14 for controlling its break-make is provided on increasing enthalpy pipeline 12.By the structure type energy that low temperature valve was arranged on crossing cold loop
Enough circulations or disconnection to crossing the refrigerant in cold loop carry out effective control action, by being arranged on Gas-supplying enthalpy-increasing pipeline
The structure type of increasing enthalpy valve can carry out effective control action to the circulation or disconnection of the refrigerant in Gas-supplying enthalpy-increasing pipeline, from
And the effect controling effectively to the two pipeline is realized according to the needs of actual conditions.
The present invention also provides a kind of control methods of multi-online air-conditioning system, use multi-online air-conditioning system above-mentioned,
It is in and is controlled to adjust respectively under the different conditions of indoor refrigeration or indoor heating and it is cut between different conditions
Control and regulation are switched over when changing.Multi-online air-conditioning system through the invention and control method, match by using auxiliary heat-exchanging
The structure type of intelligent control is closed, it being capable of the effectively actual temp of the outdoor environment residing for system and other practical feelings
Condition carries out intelligence, accurately and efficiently regulates and controls, and effectively realizes and realized under a variety of different operating statuses and operating condition
It expeditiously exchanges heat, energy utilization rate is greatly improved, the heating efficiency being improved particularly under low temperature environment.
Preferably, it when indoor refrigeration, adjusts the control device and the first branch 7 is made to disconnect, is second described
Road 8 is connected.In the case of freezing indoors, i.e., without carrying out air injection enthalpy-increasing effect under such operating mode, control set for adjusting makes the
One branch disconnects, the second branch is connected so that the refrigerant of subcooler direction of flow flows through the second branch, without qi leel, no
Heat exchange effect is carried out, normal refrigerating operaton process is effectively realized.
Preferably, when the system comprises crossing cold loop 11, Gas-supplying enthalpy-increasing pipeline 12, crossing low temperature valve 13 and increasing enthalpy valve 14,
Control it is described cross low temperature valve 13 open with connect it is described cross cold loop 11, control increasing enthalpy valve 14 is closed to disconnect the Gas-supplying enthalpy-increasing pipe
Road 12.Opened low temperature valve can be that main road refrigerant cools down by subcooler 6 with opened cold loop in such cases,
Raising system degree of supercooling, to improve the refrigeration effect of system.
Preferably, it when indoor heating and outdoor environment temperature are higher than -15 DEG C, adjusts the control device and makes described the
One branch 7 disconnects, the second branch 8 is connected.In the case of heating indoors, i.e., need to carry out air injection enthalpy-increasing work under such operating mode
With, and when outdoor environment temperature is higher than -15 DEG C, outdoor environment temperature is not very low at this time, it is only necessary to carry out common jet and increase
Enthalpy process just can achieve the purpose that raising system exchange capability of heat and efficiency, without increasing auxiliary heating to improve increasing enthalpy ability, adjust
Section control device makes the first branch disconnect, the second branch is connected so that the refrigerant of subcooler direction of flow flows through second
Road (acts on) without auxiliary heat-exchanging without qi leel, without heat exchange effect, can effectively realize under normal temperature
Heating process.
Preferably, when the system comprises crossing cold loop 11, Gas-supplying enthalpy-increasing pipeline 12, crossing low temperature valve 13 and increasing enthalpy valve 14,
The low temperature valve 13 of crossing is controlled to close to disconnect cold loop 11,14 opening of control increasing enthalpy valve crossed to connect the Gas-supplying enthalpy-increasing pipe
Road 12.Increasing enthalpy valve is opened in such cases to open Gas-supplying enthalpy-increasing pipeline, can effectively realize common heating operation indoors
The refrigerant for flowing through subcooler is drained in compressor under process and carries out Gas-supplying enthalpy-increasing, completes the heating in the case of ordinary temp
The process of cycle improves heat exchange efficiency.
Preferably, it when indoor heating and outdoor environment temperature are less than -15 DEG C, adjusts the control device and makes described the
One branch 7 is connected, the second branch 8 disconnects.In the case of heating indoors, i.e., need to carry out air injection enthalpy-increasing effect under such operating mode,
And outdoor environment temperature be less than -15 DEG C when, outdoor environment temperature is relatively low at this time, if only carry out common air injection enthalpy-increasing process without
Method achievees the purpose that raising system exchange capability of heat and efficiency, therefore then needs to increase auxiliary heating to improve increasing enthalpy ability, adjusts
Control device makes the first branch connect, the second branch disconnects so that the refrigerant of subcooler direction of flow flows through the first branch,
Make it by qi leel, carry out heat exchange effect (carrying out auxiliary heat-exchanging effect), the heating under lower temperature can be effectively realized
Operational process.
Preferably, when the system comprises crossing cold loop 11, Gas-supplying enthalpy-increasing pipeline 12, crossing low temperature valve 13 and increasing enthalpy valve 14,
The low temperature valve 13 of crossing is controlled to close to disconnect cold loop 11,14 opening of control increasing enthalpy valve crossed to connect the Gas-supplying enthalpy-increasing pipe
Road 12.Increasing enthalpy valve is opened in such cases to open Gas-supplying enthalpy-increasing pipeline, can be effectively realized relatively low in outdoor environment temperature
In the case of indoor heating operational process, the refrigerant for flowing through subcooler is drained in compressor and carries out Gas-supplying enthalpy-increasing, complete compared with
The process of heating cycle in the case of low temperature, improves heat exchange efficiency.
Operation principle and preferred embodiment of the invention is described below
The present invention provides a kind of super low temperature heat pump air conditioning applications in particular for cold zone, not only can effectively reduce
The pollution of environment, can also improve energy utilization rate, and low-temperature enthalpy-increasing (EVI) multi-connected machine, aiming at high energy efficiency, high heating capacity
And a novel multi-connected machine researched and developed, core component are to spray the application of enthalpy compressor；
Its advantage is as follows：
Low-temperature enthalpy-increasing (EVI) multi-connected machine, has and improves heating capacity, and basic principle is as follows：
It heats under increasing enthalpy pattern, the system of junction belt economizer designs, and can improve between evaporator inlet and outlet
Enthalpy difference simultaneously increases the refrigerant flow of compressor outlet and improves the acting of compression process, to keep the heating capacity of system notable
Increase.
B, " refrigeration supercooling or double mode increasing enthalpy+band economizer " mainly improves refrigerating capacity, and basic principle is as follows：
Under refrigeration mode, the liquid come out from condenser is further cooled down by subcooler, increases degree of supercooling, evaporator
Enthalpy difference between entrance and exit increases, from indoor environment to absorb heat more, thereby reduces indoor temperature, reaches raising
The purpose of refrigerating capacity；
For above principle and experiment measured result, because can effectively improve heating capacity, therefore spraying enthalpy compressor can
To be applied to completely in ultralow heating environment, nearly 30% ability can be improved than traditional compressor.
Existing system scheme still has the space for further promoting heating capacity though there is 30% heating capacity to be promoted；
This patent is optimized aiming at the system schema of existing low-temperature enthalpy-increasing multi-connected machine；
System optimization is carried out to existing low-temperature enthalpy-increasing multi-line system, system when further promoting low-temperature heating heats energy
Power, to ensure under lower limiting temperature operating mode, the demand of the heating comfort of user；
In low temperature environment (- 15 DEG C of outdoor temperature or lower environment temperature, when air-conditioner set heating operation, because of machine outside
Temperature is too low, and unit cannot absorb enough heats from environment, and liquid refrigerant is transformed into gaseous refrigerant, this phenomenon
A large amount of liquid refrigerants can be caused to flow directly in gas-liquid separator (qi leel), meanwhile, this phenomenon also results in system pressure mistake
Low and delivery temperature also decreases, the reduction of pressure and temperature, can directly result in heating capacity decaying, therefore, existing according to this
As using the system schema of the multi-connected machine of existing low-temperature enthalpy-increasing, optimizing；
Prioritization scheme (sees below system schema)：
In heating operation, " auxiliary heat is opened " function when just thinking that outdoor environment temperature is less than -15 DEG C, is carried out, i.e.,：From high temperature
Refrigerant releases heat by indoor heat exchanger, and becomes medium temperature refrigerant；Subcooler is entered with system, by supercooling
Device heat exchange acts on, and becomes medium and low temperature refrigerant, and this part is by three-way diverter valve, directly by cryogen in this part,
It is introduced into in heat exchange function qi leel, to the liquid refrigerant of extremely low temperature in qi leel, (extremely low refrigerant is because of warp in qi leel
The reducing pressure by regulating flow effect of heating electric expansion valve (EXV) is crossed, and with medium temperature and medium pressure refrigerant, become the refrigeration of low-temp low-pressure
Agent, temperature are far below middle cryogen temperature) it is heated, to lifting system low pressure, and then delivery temperature also has centainly
It is promoted, finally, improves the heating leaving air temp and heating capacity of machine system, ensure that comfort；
And the operating mode for outdoor environment temperature higher than -15 DEG C, heating operation is also without " auxiliary heat is opened " function；Together
Sample, in refrigeration mode, also without " auxiliary heat is opened " function.
This patent utilizes enthalpy-increasing compressor, three-way diverter valve and the gas-liquid separator with heat exchange function, multi-joint to be promoted
The extremely low environment temperature heating capacity of machine system is optimized for existing low-temperature enthalpy-increasing multi-line system scheme, to improve about
10% heating capacity can promote nearly 40% low-temperature heating ability compared with conventional heat pump.
Note：
1, enthalpy-increasing compressor refers to a kind of compressor for increasing gas benefit enthalpy function, it is characterized in that can pass through gaseous coolant
Spraying technique forms second-compressed to gaseous coolant, ultimately causes that capacity is big, the high a kind of compressor of ability；
2, three-way diverter valve refers to being controlled by progress motor, and switch control is carried out to two channels, when a-road-through, another way
It closes, you can to change the valve class of fluid flow direction；
3, there is heat exchange function gas-liquid separator (abbreviation qi leel)：Refer to having gaseous state, liquid refrigerant phase separation, and handle
Gaseous refrigerant is separated, while qi leel bottom (inside) carries heat exchanger tube, is completely independent inside and outside heat exchanger tube, but can carry out
The pressure vessel of heat exchange；
1, system schema
A, with former low-temperature enthalpy-increasing system schema difference lies in：Add three-way diverter valve for switching refrigerant flow direction, simultaneously
Original gas-liquid separator is replaced, is become with heat exchange function gas-liquid separator, two elements are combined, and form that " auxiliary heat is opened
Open " mechanism；
B, (1) refrigeration flow direction and control：
As shown in Fig. 2, increasing enthalpy (EVI) compressor air-discharging, outdoor heat exchanger is flowed by four-way valve, it is swollen by heating electronics
Swollen valve (EXV) is divided into two-way in refrigerant, all the way：By subcooler, excessively interior machine electric expansion valve (EXV) enters back into interior and changes
Hot device is eventually flowed into qi leel in press after four-way valve, completes a major cycle；Another way：By three-way diverter valve,
AC is logical at this time, and AB is disconnected, by subcooler EXV1, is acted on by reducing pressure by regulating flow, becomes low-temp low-pressure gaseous refrigerant, using mistake
Low temperature valve flows in qi leel；Under this pattern, " " mechanism does not come into force for auxiliary heat unlatching；
(2) heating flow direction and control：
As shown in figure 4, when outdoor environment temperature is less than -15 DEG C, increasing enthalpy (EVI) compressor air-discharging is flowed by four-way valve
Indoor heat exchanger, by interior machine electric expansion valve (EXV) after subcooler, refrigerant is divided into two-way, all the way：Cross heating electronics
Expansion valve (EXV), enters back into outdoor heat exchanger, is eventually flowed into press into qi leel after four-way valve, completes primary master and follows
Ring；Another way：By three-way diverter valve, AB is logical at this time, and AC is disconnected, first passes through qi leel and adds to the low-temperature refrigerant in qi leel
Heat is entering subcooler EXV1, is being acted on by reducing pressure by regulating flow, become low-temp low-pressure gaseous refrigerant, using spray enthalpy valve, flows to
In compressor；Under this pattern, " auxiliary heat opens " mechanism in force；
As shown in figure 3, when outdoor environment temperature is higher than -15 DEG C, increasing enthalpy (EVI) compressor air-discharging is flowed by four-way valve
Indoor heat exchanger, by interior machine electric expansion valve (EXV) after subcooler, refrigerant is divided into two-way, all the way：Cross heating electronics
Expansion valve (EXV), enters back into outdoor heat exchanger, is eventually flowed into press into qi leel after four-way valve, completes primary master and follows
Ring；Another way：By three-way diverter valve, AC is logical at this time, and AB is disconnected, and by subcooler EXV1, (without qi leel) was directly entered
Cooler EXV1, is acted on by reducing pressure by regulating flow, becomes low-temp low-pressure gaseous refrigerant, using spray enthalpy valve, is flowed in compressor；This
Under pattern, " " mechanism does not come into force for auxiliary heat unlatching.
2, control program
1, it under refrigeration mode, after press successfully starts up 5s, crosses low temperature valve and opens, sprays the closing of enthalpy valve, four-way valve power-off, subcooler
Three-way diverter valve-AC is logical, AB breaks, and the control of subcooler EXV controls aperture by the degree of superheat of subcooler, and " " mechanism is or not auxiliary heat unlatching
It comes into force；
2, under heating mode, when outdoor environment temperature is higher than -15 DEG C, press successfully starts up and four-way valve powers on and successfully
Low temperature valve closing is crossed in completion commutation, the unlatching of spray enthalpy valve, and subcooler three-way diverter valve-AC is logical, AB is disconnected, and the aperture of subcooler EXV, which is pressed, inhales
The gas degree of superheat controls aperture, and " " mechanism does not come into force for auxiliary heat unlatching；
3, under heating mode, when outdoor environment temperature is less than -15 DEG C, ibid, but subcooler three-way diverter valve-AB it is logical,
AC is disconnected, and the aperture of subcooler EXV controls aperture by suction superheat, and " auxiliary heat opens " mechanism in force.
Those skilled in the art will readily recognize that under the premise of not conflicting, above-mentioned each advantageous manner can be free
Ground combination, superposition.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.With
Only it is the preferred embodiment of the present invention described in upper, it is noted that for those skilled in the art, not
Under the premise of being detached from the technology of the present invention principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as this
The protection domain of invention.
Claims (16)
1. a kind of multi-online air-conditioning system, it is characterised in that：Including compressor (1), outdoor heat exchanger (2), indoor heat exchanger
(3), four-way valve (4), qi leel (5), subcooler (6) and supercooling expansion valve (15), wherein the low pressure line in the subcooler (6)
Be connected with the first branch (7) and the second branch (8) in a manner of being in parallel between pressure duct, the first branch (7) with
The form setting internal through qi leel (5), and qi leel (5) is internally provided with heat-exchanger rig (9), further includes the control first branch
(7) in the second branch (8) one of connect, the control device of another disconnection；The first branch (7) and the second branch
(8) setting is between the low pressure line and pressure duct of the subcooler (6) of described supercooling expansion valve (15) side.
2. multi-online air-conditioning system according to claim 1, it is characterised in that：The control device is setting described the
The triple valve (10) of one branch (7) and the second branch (8) phase junction.
3. multi-online air-conditioning system according to claim 2, it is characterised in that：The triple valve (10) setting is described the
The position of one of described subcooler (6) is relatively distant from one branch (7) and two phase contacts of the second branch (8)
Place.
4. according to the multi-online air-conditioning system described in one of claim 1-3, it is characterised in that：Heat-exchanger rig (9) setting
At position of the first branch (7) through the qi leel (5) inside, with the refrigeration internal to the first branch (7)
Agent exchanges heat.
5. multi-online air-conditioning system according to claim 4, it is characterised in that：The heat-exchanger rig (9) is electric heating wire.
6. according to the multi-online air-conditioning system described in one of claim 1-3, it is characterised in that：The compressor (1) is low temperature
Enthalpy-increasing compressor, and it was connected with cold loop (11) and Gas-supplying enthalpy-increasing in the low tension outlet end also branch of the subcooler (6)
Pipeline (12).
7. multi-online air-conditioning system according to claim 6, it is characterised in that：Described one end for crossing cold loop (11) and institute
The one end for stating Gas-supplying enthalpy-increasing pipeline (12) is connected, and the other end for crossing cold loop (11) is connected to the air inlet pipe of the qi leel (5)
On the road.
8. multi-online air-conditioning system according to claim 7, it is characterised in that：The Gas-supplying enthalpy-increasing pipeline (12) it is another
End is connected to the inside of the compressor (1).
9. multi-online air-conditioning system according to claim 6, it is characterised in that：It is provided in described cross on cold loop (11)
Control its break-make crosses low temperature valve (13)；And/or the increasing enthalpy valve for controlling its break-make is provided on the Gas-supplying enthalpy-increasing pipeline (12)
(14)。
10. a kind of control method of multi-online air-conditioning system, it is characterised in that：Using multi-joint described in one of claim 1-9
Air conditioner system is in it under different conditions of indoor refrigeration or indoor heating and is controlled to adjust respectively and to it in difference
Control and regulation are switched over when switching between state.
11. the control method of multi-online air-conditioning system according to claim 10, it is characterised in that：When indoor refrigeration,
Adjusting the control device makes the first branch (7) disconnection, the second branch (8) connect.
12. the control method of multi-online air-conditioning system according to claim 11, it is characterised in that：When the system comprises
When crossing cold loop (11), Gas-supplying enthalpy-increasing pipeline (12), crossing low temperature valve (13) and increasing enthalpy valve (14), controls the low temperature valve (13) of crossing and open
To connect the cold loop (11) excessively, control increasing enthalpy valve (14) is closed to disconnect the Gas-supplying enthalpy-increasing pipeline (12).
13. the control method of multi-online air-conditioning system according to claim 10, it is characterised in that：When indoor heating and room
When external environment temperature is higher than -15 DEG C, adjusts the control device and make the first branch (7) disconnection, the second branch (8)
It connects.
14. the control method of multi-online air-conditioning system according to claim 13, it is characterised in that：When the system comprises
When crossing cold loop (11), Gas-supplying enthalpy-increasing pipeline (12), crossing low temperature valve (13) and increasing enthalpy valve (14), controls the low temperature valve (13) of crossing and close
To disconnect cold loop (11), control increasing enthalpy valve (14) opening crossed to connect the Gas-supplying enthalpy-increasing pipeline (12).
15. the control method of multi-online air-conditioning system according to claim 10, it is characterised in that：When indoor heating and room
When external environment temperature is less than -15 DEG C, adjusts the control device and make the first branch (7) connection, the second branch (8) disconnected
It opens.
16. the control method of multi-online air-conditioning system according to claim 15, it is characterised in that：When the system comprises
When crossing cold loop (11), Gas-supplying enthalpy-increasing pipeline (12), crossing low temperature valve (13) and increasing enthalpy valve (14), controls the low temperature valve (13) of crossing and close
To disconnect cold loop (11), control increasing enthalpy valve (14) opening crossed to connect the Gas-supplying enthalpy-increasing pipeline (12).
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| US11105544B2 (en) * | 2016-11-07 | 2021-08-31 | Trane International Inc. | Variable orifice for a chiller |
| CN107747826B (en) * | 2017-11-13 | 2023-10-13 | 珠海格力电器股份有限公司 | Air Conditioning System |
| CN109405233B (en) * | 2018-10-08 | 2024-01-26 | 珠海格力电器股份有限公司 | Control device and method for air conditioner, air conditioner and storage medium |
| CN109386909B (en) * | 2018-10-22 | 2020-10-16 | 广东美的暖通设备有限公司 | Outdoor unit, oil return control method and air conditioner |
| CN109915991A (en) * | 2019-02-28 | 2019-06-21 | 广东美的暖通设备有限公司 | The control method and device of multi-line system blowout prevention enthalpy valve body blocking |
| CN111059681A (en) * | 2019-11-20 | 2020-04-24 | 珠海格力电器股份有限公司 | Compressor air-supplementing enthalpy-increasing system with enthalpy-increasing function and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1198905A (en) * | 1983-01-31 | 1986-01-07 | Thomas J. Fagan, Jr. | Heat pump apparatus and method of operating the same |
| CN102032698A (en) * | 2009-10-05 | 2011-04-27 | 松下电器产业株式会社 | Refrigeration cycle apparatus and hot water heater |
| CN202083150U (en) * | 2011-05-18 | 2011-12-21 | 广州德能热源设备有限公司 | Secondary air injection device of efficient ultralow-temperature heat pump |
| CN102679609A (en) * | 2012-06-07 | 2012-09-19 | 四川同达博尔置业有限公司 | Air-cooled heat pump air conditioner |
| CN105485767A (en) * | 2015-12-22 | 2016-04-13 | 珠海格力电器股份有限公司 | Multi-split air conditioning system and control method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5927088A (en) * | 1996-02-27 | 1999-07-27 | Shaw; David N. | Boosted air source heat pump |
-
2016
- 2016-05-11 CN CN201610311178.7A patent/CN105972717B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1198905A (en) * | 1983-01-31 | 1986-01-07 | Thomas J. Fagan, Jr. | Heat pump apparatus and method of operating the same |
| CN102032698A (en) * | 2009-10-05 | 2011-04-27 | 松下电器产业株式会社 | Refrigeration cycle apparatus and hot water heater |
| CN202083150U (en) * | 2011-05-18 | 2011-12-21 | 广州德能热源设备有限公司 | Secondary air injection device of efficient ultralow-temperature heat pump |
| CN102679609A (en) * | 2012-06-07 | 2012-09-19 | 四川同达博尔置业有限公司 | Air-cooled heat pump air conditioner |
| CN105485767A (en) * | 2015-12-22 | 2016-04-13 | 珠海格力电器股份有限公司 | Multi-split air conditioning system and control method |
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