CN105972717A - Variable refrigerant volume air conditioning system and control method thereof - Google Patents
Variable refrigerant volume air conditioning system and control method thereof Download PDFInfo
- Publication number
- CN105972717A CN105972717A CN201610311178.7A CN201610311178A CN105972717A CN 105972717 A CN105972717 A CN 105972717A CN 201610311178 A CN201610311178 A CN 201610311178A CN 105972717 A CN105972717 A CN 105972717A
- Authority
- CN
- China
- Prior art keywords
- branch road
- valve
- enthalpy
- conditioning system
- online air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Abstract
The invention provides a variable refrigerant volume air conditioning system. The variable refrigerant volume air conditioning system comprises a compressor (1), an outdoor heat exchanger (2), an indoor heat exchanger (3), a four-way valve (4), an air distributor (5), a supercooler (6) and a supercooling expansion valve (15), wherein a first branch pipeline (7) and a second branch pipeline (8) are arranged between a low-pressure pipeline and a high-pressure pipeline of the supercooler (6) in a manner of being connected in parallel, the first branch pipeline (7) is arranged in a manner of penetrating through the inner part of the air distributor (5), and a heat exchanger (9) is arranged in the air distributor (5). The variable refrigerant volume air conditioning system further comprises a control device used for controlling the connection of one of the first branch pipeline (7) and the second branch pipeline (8) and the disconnection of the other one. Through the variable refrigerant volume air conditioning system provided by the invention, the technical problem that the heat exchange effect is poor under the condition that the outdoor environment temperature is low can be solved. The heating efficiency of the system particularly in a low-temperature environment is effectively increased, the heat exchange effect is enhanced, and the energy utilizing rate is increased. The invention further relates to a control method of the variable refrigerant volume air conditioning system.
Description
Technical field
The invention belongs to air-conditioning and heat pump technical field, be specifically related to a kind of multi-online air-conditioning system and
Control method.
Background technology
At present, the domestic outer machine product of the biggest multi-connected machine, it is common to use common frequency conversion high pressure chest screw compressor,
I.e. use non-increasing enthalpy Scroll Inverter Compressor, compared with spray enthalpy frequency-changing cyclone compressor, have " with frequency, energy
Power ability low, same, efficiency is low, and high frequency delivery temperature is high, and worst cold case heating capacity is low " shortcoming.
Meanwhile, country the most clearly proposes the requirement of " energy-saving and emission-reduction ", and legalization, institutionalization, and
The relevant multi-connected machine Energy Efficiency Standard requirement of country, improved with day；The high energy efficiency product of air conditioner industry, is also continuous
Update, competition continues to increase；Therefore, the efficiency level to lifting multi-connected machine product, is also to compel
The eyebrows and eyelashes.
It addition, the heating in winter of cold zone, it is main for still using combusts fossil raw material, and this not only causes greatly
The environmental pollution of amount, also result in energy waste simultaneously.
Owing to the existence energy utilization rate of multi-online air-conditioning system of the prior art is low, heat transfer effect is paid no attention to
Think, and the technical problem such as environmental pollution, research design the most of the present invention go out a kind of multi-online air-conditioning system and
Its control method.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is to overcome multi-online air-conditioning system of the prior art to deposit
In the defect that especially energy utilization rate is low in low temperature environment, heat transfer effect is undesirable, thus provide a kind of
Multi-online air-conditioning system and control method thereof.
The present invention provides a kind of multi-online air-conditioning system, and it includes compressor, outdoor heat exchanger, indoor heat exchange
Device, cross valve, edema caused by disorder of QI, subcooler and supercool expansion valve, wherein at low pressure line and the height of described subcooler
Being connected with the first branch road and the second branch road between pressure pipe road in the way of being in parallel, the first branch road is to run through
Form within edema caused by disorder of QI is arranged, and edema caused by disorder of QI is internally provided with heat-exchanger rig, also includes controlling the first branch road and the
In two branch roads one of connect, another disconnect control device.
Preferably, described first branch road and described second branch road are arranged on the described of described supercool expansion valve side
Between low pressure line and the pressure duct of subcooler.
Preferably, described control device is to be arranged on described first branch road and described second branch road phase junction
Three-way valve.
Preferably, during described three-way valve is arranged on two phase contacts of described first branch road and described second branch road
It is relatively distant from the position of one of them of described subcooler.
Preferably, described heat-exchanger rig is arranged on described first branch road through the position within described edema caused by disorder of QI
Place, to carry out heat exchange to the cold-producing medium within described first branch road.
Preferably, described heat-exchanger rig is electrical heating wire.
Preferably, described compressor is low-temperature enthalpy-increasing compressor, and described subcooler low tension outlet end also
Branch ground connects cold loop and Gas-supplying enthalpy-increasing pipeline.
Preferably, described one end crossing cold loop is connected with one end of described Gas-supplying enthalpy-increasing pipeline, described supercool
The other end in loop is connected on the air inlet pipeline of described edema caused by disorder of QI.
Preferably, the other end of described Gas-supplying enthalpy-increasing pipeline is connected to the inside of described compressor.
Preferably, be provided with its break-make of control on described cold loop excessively crosses low temperature valve；And/or, in described benefit
Gas increases the increasing enthalpy valve being provided with its break-make of control on enthalpy pipeline.
The present invention also provides for the control method of a kind of multi-online air-conditioning system, and it uses aforesaid multi-gang air-conditioner
System, it is under the different conditions of indoor refrigeration or indoor heating control to adjust respectively and to its
Control and regulation are switched over during switching between different conditions.
Preferably, when indoor refrigeration, regulate described control device make described first branch road disconnect, described
Second branch road is connected.
Preferably, when described system included cold loop, Gas-supplying enthalpy-increasing pipeline, and crossed low temperature valve and increase enthalpy valve,
Control described low temperature valve of crossing to open to connect and described cross cold loop, control to increase enthalpy valve and close and increase disconnecting described QI invigorating
Enthalpy pipeline.
Preferably, when indoor heating and outdoor environment temperature are higher than-15 DEG C, regulate described control device and make
Obtain described first branch road disconnection, described second branch road is connected.
Preferably, when described system included cold loop, Gas-supplying enthalpy-increasing pipeline, and crossed low temperature valve and increase enthalpy valve,
Control described low temperature valve of crossing to close and described cross cold loop to disconnect, control to increase enthalpy valve and open to connect described QI invigorating and increase
Enthalpy pipeline.
Preferably, when indoor heating and outdoor environment temperature are less than-15 DEG C, regulate described control device and make
Obtain described first branch road connection, the second branch road disconnects.
Preferably, when described system included cold loop, Gas-supplying enthalpy-increasing pipeline, and crossed low temperature valve and increase enthalpy valve,
Control described low temperature valve of crossing to close and described cross cold loop to disconnect, control to increase enthalpy valve and open to connect described QI invigorating and increase
Enthalpy pipeline.
A kind of multi-online air-conditioning system and control method thereof that the present invention provides have the advantages that
1. by the multi-online air-conditioning system of the present invention, by using auxiliary heat-exchanging to coordinate the knot of Based Intelligent Control
Configuration formula, it is possible to efficiently solve the technical problem that system energy utilization rate is low, heat transfer effect is undesirable, have
The effect raising system especially heating efficiency in low temperature environment, strengthens heat transfer effect, improves energy utilization rate；
2. by the multi-online air-conditioning system of the present invention, by using enthalpy-increasing compressor and coordinating increasing enthalpy passage
Carry out the mode of Gas-supplying enthalpy-increasing, it is possible to effectively increasing compressor air-discharging amount, heat exchanger indoor unit heats
Circularly cooling dosage increases, it is achieved heating capacity increases, and is more applicable for cold district.
3. by multi-online air-conditioning system and the control method of the present invention, it is possible to effectively according to residing for system
The actual temp of outdoor environment and other practical situations, carry out intelligence, regulate and control accurately and efficiently, and have
Effect ground realizes realizing heat exchange expeditiously, energy utilization rate under various different running statuses and operating condition
It is greatly improved, has been improved particularly the heating efficiency under low temperature environment；
4. the multi-online air-conditioning system of the present invention and control method, work process Green environmental protection, will not bring
Environmental pollution.
Accompanying drawing explanation
Fig. 1 is the structural representation of multi-online air-conditioning system of the prior art；
Fig. 2 is the multi-online air-conditioning system of present invention structural representation under refrigerating state；
Fig. 3 is that under heating state and outdoor environment temperature is higher than-15 DEG C for the multi-online air-conditioning system of the present invention
Structural representation；
Fig. 4 is that under heating state and outdoor environment temperature is less than-15 DEG C for the multi-online air-conditioning system of the present invention
Structural representation.
In figure, reference is expressed as:
1 compressor, 2 outdoor heat exchangers, 3 indoor heat exchangers, 4 cross valves, 5 edema caused by disorder of QI, 6
Subcooler, 7 first branch roads, 8 second branch roads, 9 heat-exchanger rigs, 10 three-way valve, 11 is supercool
Loop, 12 Gas-supplying enthalpy-increasing pipelines, 13 cross low temperature valve, and 14 increase enthalpy valve, 15 supercool expansion valves.
Detailed description of the invention
As in Figure 2-4, the present invention provides a kind of air conditioning system, and it includes compressor 1, outdoor heat exchanger
2, indoor heat exchanger 3, cross valve 4, edema caused by disorder of QI 5 (i.e. gas-liquid separator), subcooler 6 and supercool expansion
Valve 15, wherein connects in the way of being in parallel between low pressure line and the pressure duct of described subcooler 6 and sets
Being equipped with the first branch road 7 and the second branch road 8, the first branch road 7 is arranged to run through the form within edema caused by disorder of QI 5, and
Edema caused by disorder of QI 5 is internally provided with heat-exchanger rig 9, also include controlling in the first branch road 7 and the second branch road 8 one of
Connection, another control device disconnected.
By the multi-online air-conditioning system of the present invention, by parallel between the low pressure, pressure duct of subcooler
First, second branch road is set, and make the first branch road run through edema caused by disorder of QI and heat-exchanger rig is set in edema caused by disorder of QI,
The cold-producing medium flowed through in the first branch road can be carried out heat exchange effect, and control the first and second branch roads are set
One of logical, control device that another is disconnected, it is possible to select one of first, second branch road to connect as required,
Thus according to actual needs the cold-producing medium in pipe is carried out heat exchange, it is possible to solve the relatively low situation of outdoor environment temperature
The technical problem that its heat transfer effect lower is poor, i.e. by using auxiliary heat-exchanging to coordinate the structure shape of Based Intelligent Control
Formula, it is possible to control being selectively turned on of these two branch roads according to actual needs, and then when needs auxiliary heat-exchanging
The cold-producing medium in refrigerant pipe is made to carry out heat exchange with the heat-exchanger rig in edema caused by disorder of QI, it is possible to efficiently solve system
The technical problem that energy utilization rate is low, heat transfer effect is undesirable, is effectively improved system especially at low temperature environment
In heating efficiency, strengthen heat transfer effect, improve energy utilization rate.
Preferably, described first branch road 7 and described second branch road 8 are arranged on described supercool expansion valve 15 1
Between low pressure line and the pressure duct of the described subcooler 6 of side.First branch road and the second branch road are arranged on
Between low pressure line and the pressure duct of the described subcooler of described supercool expansion valve side, this is first and
The preferred arrangement form of two branch roads, i.e. can (i.e. be carried out before supercool expansion valve in convection current according to actual needs
Before reducing pressure by regulating flow) low pressure line in cold-producing medium carry out the effect of auxiliary heat-exchanging, more preferably reach to improve
Heat exchange efficiency, the purpose of energy-conservation increasing enthalpy.
Preferably, described control device is for being arranged on described first branch road 7 and described second branch road 8 phase contact
The three-way valve 10 at place.By being chosen as being arranged on the threeway of the first and second branch road phase junctions by controlling device
Valve, it is possible to effectively utilize the exclusive structure of three-way valve, three-way connection (pipe) road is controlled, is effectively realized
Flow tube road with first branch road connect, second branch road disconnect, or so that incoming flow pipe road with second branch road connect,
First branch road disconnect, it is achieved in first, second branch road one of connect, another disconnect control action.
Preferably, described three-way valve 10 is arranged on described first branch road 7 and two of described second branch road 8
Phase contact is relatively distant from the position of one of them of described subcooler 6, is i.e. arranged on described in being relatively distant from
Described first branch road 7 of subcooler 6 and the phase junction of described second branch road 8.This is the more excellent of three-way valve
Position is specifically set, so incoming flow pipe road can be flowed through the position of the joining of the first branch road and the second branch road
The place of putting switches over the effect of guiding, and the cold-producing medium of flow path direction is guided to the first branch road or the second branch road in the future.
Preferably, described heat-exchanger rig 9 is arranged on described first branch road 7 through within described edema caused by disorder of QI 5
Position, to carry out heat exchange to the cold-producing medium within described first branch road 7.Heat-exchanger rig is arranged at edema caused by disorder of QI
The internal position being positioned at the first branch road, it is possible to effectively and fully to the cold-producing medium within the first branch road enter
Row heat exchange effect, it is achieved energy-conservation increasing enthalpy, the effect of raising heat exchange efficiency.
Preferably, described heat-exchanger rig 9 is electrical heating wire.This is preferred kind and the structure shape of heat-exchanger rig
Formula, is chosen as electrical heating wire by heat-exchanger rig, it is possible to effectively carry out the cold-producing medium flowed through in the first branch road
The effect of heating, is effectively improved increasing enthalpy effect and improves heat exchange efficiency.
Preferably, described compressor 1 is low-temperature enthalpy-increasing compressor (i.e. EVI compressor), and in described mistake
The low tension outlet end also branch ground of cooler 6 connects cold loop 11 and Gas-supplying enthalpy-increasing pipeline 12.Will compression
Machine is chosen as low-temperature enthalpy-increasing compressor (such as screw compressor, rotary compressor etc.) and can effectively increase
Pressure at expulsion, improves the exchange capability of heat of system and heat exchange efficiency, and in the low tension outlet end branch of subcooler
Connected cold loop and Gas-supplying enthalpy-increasing pipeline, cold reflux or Gas-supplying enthalpy-increasing can be realized according to actual needs
Useful effect and effect, be more applicable for cold district.
Preferably, described one end crossing cold loop 11 is connected with one end of described Gas-supplying enthalpy-increasing pipeline 12, institute
The other end stating cold loop 11 is connected on the air inlet pipeline of described edema caused by disorder of QI 5.By by cold loop another
End is connected on the air inlet pipeline of edema caused by disorder of QI, it is possible to will be through according to practical situation (need not the situation of Gas-supplying enthalpy-increasing)
The cold-producing medium crossing subcooler is drained in edema caused by disorder of QI, completes circulation.
Preferably, the other end of described Gas-supplying enthalpy-increasing pipeline 12 is connected to the inside of described compressor 1.Pass through
Gas-supplying enthalpy-increasing pipeline is connected to the mode within compressor, it is possible to be effectively realized and compressor is carried out middle pressure increasing
The effect of enthalpy QI invigorating, increases the pressure at expulsion of compressor, is effectively improved the heat exchange of whole multi-online air-conditioning system
Ability and heat exchange efficiency.
Preferably, be provided with its break-make of control on described cold loop 11 excessively crosses low temperature valve 13；And/or,
The increasing enthalpy valve 14 controlling its break-make it is provided with on described Gas-supplying enthalpy-increasing pipeline 12.By setting on cold loop excessively
The circulation of the cold-producing medium crossed in cold loop or disconnection can effectively be controlled by the version putting low temperature valve
Make use, can be in Gas-supplying enthalpy-increasing pipeline by arranging the version increasing enthalpy valve on Gas-supplying enthalpy-increasing pipeline
The circulation of cold-producing medium or disconnection carry out effective control action, thus according to practical situation need realize right
The effect that pipeline both should control effectively.
The present invention also provides for the control method of a kind of multi-online air-conditioning system, and it uses aforesaid multi-gang air-conditioner
System, it is under the different conditions of indoor refrigeration or indoor heating control to adjust respectively and to its
Control and regulation are switched over during switching between different conditions.By multi-online air-conditioning system and the control of the present invention
Method, by using auxiliary heat-exchanging to coordinate the version of Based Intelligent Control, it is possible to effectively according to residing for system
The actual temp of outdoor environment and other practical situations, carry out intelligence, regulate and control accurately and efficiently, and have
Effect ground realizes realizing heat exchange expeditiously, energy utilization rate under various different running statuses and operating condition
It is greatly improved, has been improved particularly the heating efficiency under low temperature environment.
Preferably, when indoor refrigeration, regulate described control device described first branch road 7 is disconnected, institute
State the second branch road 8 to connect.In the case of the refrigeration of indoor, without carrying out air injection enthalpy-increasing effect under i.e. this kind operating mode,
Control set for adjusting makes the first branch road disconnect, the second branch road is connected so that subcooler carrys out the refrigeration of flow path direction
Agent flows through the second branch road, without edema caused by disorder of QI, does not carries out heat exchange effect, is effectively realized fortune of freezing normally
Row process.
Preferably, included cold loop 11, Gas-supplying enthalpy-increasing pipeline 12 when described system, cross low temperature valve 13 and increase
During enthalpy valve 14, control described low temperature valve 13 excessively and open to connect described cold loop 11 excessively, control to increase enthalpy valve 14
Close to disconnect described Gas-supplying enthalpy-increasing pipeline 12.The most opened low temperature valve is with opened cold loop, energy
Enough lowered the temperature for main road cold-producing medium by subcooler 6, improve system degree of supercooling, thus improve the system of system
Cold effect.
Preferably, when indoor heating and outdoor environment temperature are higher than-15 DEG C, regulate described control device and make
Described first branch road 7 disconnects, described second branch road 8 is connected.In the case of indoor heating, i.e. this kind work
Need to carry out air injection enthalpy-increasing effect under condition, and when outdoor environment temperature is higher than-15 DEG C, now outdoor environment temperature
Degree is not the lowest, it is only necessary to carries out common air injection enthalpy-increasing process and just can reach raising system exchange capability of heat and effect
The purpose of rate, it is not necessary to increasing auxiliary heating and increase enthalpy ability to improve, control set for adjusting makes the first branch road break
Open, second branch road connect so that subcooler carrys out the cold-producing medium of flow path direction and flows through the second branch road, without edema caused by disorder of QI,
Do not carry out heat exchange effect (the most not carrying out auxiliary heat-exchanging effect), it is possible to be effectively realized the system under normal temperature
Hot running.
Preferably, included cold loop 11, Gas-supplying enthalpy-increasing pipeline 12 when described system, cross low temperature valve 13 and increase
During enthalpy valve 14, control described low temperature valve 13 excessively and close to disconnect described cold loop 11 excessively, control to increase enthalpy valve 14
Open to connect described Gas-supplying enthalpy-increasing pipeline 12.Open increasing enthalpy valve in such cases to open Gas-supplying enthalpy-increasing pipe
Road, it is possible to be effectively realized and under the common heating process in indoor, the cold-producing medium flowing through subcooler be drained to
Compressor carries out Gas-supplying enthalpy-increasing, completes the process heating circulation in the case of ordinary temp, improve heat exchange effect
Rate.
Preferably, when indoor heating and outdoor environment temperature are less than-15 DEG C, regulate described control device and make
Described first branch road 7 is connected, the second branch road 8 disconnects.In the case of indoor heating, under i.e. this kind operating mode
Need to carry out air injection enthalpy-increasing effect, and when outdoor environment temperature is less than-15 DEG C, now outdoor environment temperature is relatively
Low, if only carrying out common air injection enthalpy-increasing process to be unable to reach raising system exchange capability of heat and the mesh of efficiency
, the most then needing to increase auxiliary heating and increase enthalpy ability to improve, control set for adjusting makes the first branch road connect
Logical, the second branch road disconnects so that subcooler carrys out the cold-producing medium of flow path direction and flows through the first branch road so that it is Jing Guoqi
Divide, carry out heat exchange effect (i.e. carrying out auxiliary heat-exchanging effect), it is possible to be effectively realized the system under lower temperature
Hot running.
Preferably, included cold loop 11, Gas-supplying enthalpy-increasing pipeline 12 when described system, cross low temperature valve 13 and increase
During enthalpy valve 14, control described low temperature valve 13 excessively and close to disconnect described cold loop 11 excessively, control to increase enthalpy valve 14
Open to connect described Gas-supplying enthalpy-increasing pipeline 12.Open increasing enthalpy valve in such cases to open Gas-supplying enthalpy-increasing pipe
Road, it is possible to be effectively realized indoor heating running in the case of outdoor environment temperature is relatively low, passes through stream
The cold-producing medium of cooler is drained in compressor carry out Gas-supplying enthalpy-increasing, completes to heat circulation in the case of lower temperature
Process, improve heat exchange efficiency.
Operation principle and the preferred embodiment of the present invention are described below
The present invention provides a kind of super low temperature heat pump air conditioning applications in particular for cold zone, has been possible not only to
Effect reduces the pollution of environment, also can improve energy utilization rate, and low-temperature enthalpy-increasing (EVI) multi-connected machine, it is simply that
For high energy efficiency, high heating capacity and a Novel multi-connected machine researched and developed, its core component is to spray enthalpy compression
The application of machine；
Its advantage is as follows:
Low-temperature enthalpy-increasing (EVI) multi-connected machine, has raising heating capacity, and its ultimate principle is as follows:
Heating under increasing enthalpy pattern, the system in conjunction with band economizer designs, and can improve evaporator inlet and outlet
Between enthalpy difference and increase compressor outlet refrigerant flow and improve compression process acting, thus
The heating capacity making system dramatically increases.
B, " freeze supercool or double mode increasing enthalpy+band economizer " mainly improve refrigerating capacity, its ultimate principle
As follows:
Under refrigeration mode, cool down further through subcooler from condenser liquid out, add supercool
Degree, the enthalpy difference between evaporator inlet and outlet increases, absorbs heat more from indoor environment, and then
Reduce indoor temperature, reach to improve the purpose of refrigerating capacity；
For above principle and test measured result, because heating capacity can be effectively improved, therefore spray enthalpy pressure
Contracting machine can be applied to ultralow heat in environment completely, can improve the ability of nearly 30% than traditional compressor.
Existing system scheme, though there being the heating capacity of 30% to promote, but still has and promotes heating capacity further
Space；This patent is aiming at the system schema of existing low-temperature enthalpy-increasing multi-connected machine and is optimized；
Existing low-temperature enthalpy-increasing multiple on-line system is carried out system optimization, promotes system during low-temperature heating further
Heating capacity, thus ensure under lower limiting temperature operating mode, the demand heating comfortableness of user；
In low temperature environment (ambient temperature of outdoor temperature-15 DEG C or lower, during air conditioning unit heating operation,
Because the outer temperature of machine is too low, unit can not absorb enough heats from environment, and liquid refrigerant is transformed into gas
State cold-producing medium, this phenomenon can cause a large amount of liquid refrigerants to flow directly in gas-liquid separator (edema caused by disorder of QI), with
Time, this phenomenon also results in that system pressure is too low and delivery temperature also decreases, the fall of pressure and temperature
Low, heating capacity decay can be directly resulted in, therefore, according to this phenomenon, utilize the multi-joint of existing low-temperature enthalpy-increasing
The system schema of machine, is optimized；
Prioritization scheme (sees below system schema):
In heating operation, just think when outdoor environment temperature is less than-15 DEG C, carry out " auxiliary heat is opened " function,
That is: release heat from high temperature refrigerant through indoor heat exchanger, and become middle temperature cold-producing medium；With system
Enter subcooler, through subcooler heat exchange effect, become medium and low temperature cold-producing medium, and this part is by three
Logical reversal valve, directly by cryogen in this part, is incorporated into and has in heat exchange function edema caused by disorder of QI, in edema caused by disorder of QI
(in edema caused by disorder of QI, extremely low cold-producing medium is because of through heating electric expansion valve (EXV) to the liquid refrigerant of extremely low temperature
Reducing pressure by regulating flow effect, and use medium temperature and medium pressure cold-producing medium, become the cold-producing medium of low-temp low-pressure, its temperature is remote
Less than middle cryogen temperature) heat, thus promote system low-voltage, and then delivery temperature also has necessarily
Promoting, finally, improve machine system heats leaving air temp and heating capacity, it is ensured that comfortableness；
And for the outdoor environment temperature operating mode higher than-15 DEG C, heating operation does not carries out " auxiliary heat is opened "
Function；Equally, in refrigeration mode, do not carry out " auxiliary heat is opened " function.
This patent utilizes enthalpy-increasing compressor, three-way diverter valve and has the gas-liquid separator of heat exchange function, carries
Rise the extremely low ambient temperature heating capacity of multiple on-line system, for existing low-temperature enthalpy-increasing multiple on-line system scheme, enter
Row optimizes, thus improves the heating capacity of about 10%, can promote the low temperature of nearly 40% compared with conventional heat pump
Heating capacity.
Note:
1, enthalpy-increasing compressor refers to have the class compressor increasing gas benefit enthalpy function, it is characterized in that passing through
Gaseous coolant spraying technique, forms second-compressed to gaseous coolant, ultimately causes capacity big, and ability is high
One class compressor；
2, three-way diverter valve refers to be controlled by progressive motor, and two passages are carried out on-off control, a-road-through
Time, another road is closed, and i.e. can change the valve class that fluid flows to；
3, there is heat exchange function gas-liquid separator (abbreviation edema caused by disorder of QI): refer to possess gaseous state, liquid refrigerant
Be separated, and gaseous refrigerant separated, simultaneously bottom edema caused by disorder of QI (inner side) with heat exchanger tube, heat exchange
It is completely independent inside and outside pipe, but the pressure vessel of heat exchange can be carried out；
1, system schema
A is with the difference of former low-temperature enthalpy-increasing system schema: sets up three-way diverter valve and flows to for switching coolant,
Changing original gas-liquid separator simultaneously, become having heat exchange function gas-liquid separator, two elements combine one
Rise, form " auxiliary hot unlatching " mechanism；
B, (1) refrigeration flow to and control:
As in figure 2 it is shown, increase enthalpy (EVI) compressor air-discharging, flow into outdoor heat exchanger by cross valve, pass through
Heat electric expansion valve (EXV) and be divided into two-way at cold-producing medium, a road: through subcooler, organic electronic in crossing
Expansion valve (EXV), enters back into indoor heat exchanger, after cross valve, enters edema caused by disorder of QI, eventually flows in press,
Complete a major cycle；Another road: by three-way diverter valve, now AC leads to, and AB breaks, through subcooler
EXV1, by reducing pressure by regulating flow effect, becomes low-temp low-pressure gaseous refrigerant, then passed through low temperature valve, flow to gas
In Fen；Under this pattern, " " mechanism does not comes into force in auxiliary heat unlatching；
(2) heat the flow direction and control:
As shown in Figure 4, when outdoor environment temperature is less than-15 DEG C, increases enthalpy (EVI) compressor air-discharging, pass through
Cross valve flows into indoor heat exchanger, through interior organic electronic expansion valve (EXV) after subcooler, cold-producing medium
It is divided into two-way, a road: cross and heat electric expansion valve (EXV), enter back into outdoor heat exchanger, after cross valve,
Enter edema caused by disorder of QI, eventually flow in press, complete a major cycle；Another road: by three-way diverter valve, this
Time AB lead to, AC break, first pass through edema caused by disorder of QI and the low-temperature refrigerant in edema caused by disorder of QI heated, enter subcooler
EXV1, by reducing pressure by regulating flow effect, becomes low-temp low-pressure gaseous refrigerant, then through overspray enthalpy valve, flows to pressure
In contracting machine；Under this pattern, " auxiliary heat opens " mechanism in force；
As it is shown on figure 3, when outdoor environment temperature is higher than-15 DEG C, increases enthalpy (EVI) compressor air-discharging, pass through
Cross valve flows into indoor heat exchanger, through interior organic electronic expansion valve (EXV) after subcooler, cold-producing medium
It is divided into two-way, a road: cross and heat electric expansion valve (EXV), enter back into outdoor heat exchanger, after cross valve,
Enter edema caused by disorder of QI, eventually flow in press, complete a major cycle；Another road: by three-way diverter valve, this
Time AC lead to, AB break, through subcooler EXV1, (without edema caused by disorder of QI) is directly entered subcooler EXV1,
By reducing pressure by regulating flow effect, become low-temp low-pressure gaseous refrigerant, then through overspray enthalpy valve, flow in compressor；
Under this pattern, " " mechanism does not comes into force in auxiliary heat unlatching.
2, control program
1, under refrigeration mode, after press successfully starts up 5s, crossing low temperature valve and open, spray the closedown of enthalpy valve, cross valve breaks
Electricity, subcooler three-way diverter valve-AC is logical, AB breaks, and the degree of superheat of subcooler is pressed in the control of subcooler EXV
Controlling aperture, " " mechanism does not comes into force in auxiliary heat unlatching；
2, under heating mode, when outdoor environment temperature is higher than-15 DEG C, press successfully starts up and on cross valve
Electricity is also successfully completed commutation, and spray enthalpy valve opens, crosses low temperature valve cut out, and subcooler three-way diverter valve-AC is logical, AB
Disconnected, the aperture of subcooler EXV controls aperture by suction superheat, and " " mechanism does not comes into force in auxiliary heat unlatching；
3, under heating mode, when outdoor environment temperature is less than-15 DEG C, ibid, but subcooler triplet commutation
Valve-AB is logical, AC breaks, and the aperture of subcooler EXV controls aperture by suction superheat, and " auxiliary heat opens " machine
Structure comes into force.
Those skilled in the art is it is easily understood that on the premise of not conflicting, above-mentioned each advantageous manner can
Freely to combine, superposition.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any amendment, equivalent and the improvement etc. made within bright spirit and principle, should be included in the present invention
Protection domain within.The above is only the preferred embodiment of the present invention, it is noted that for this skill
For the those of ordinary skill in art field, on the premise of without departing from the technology of the present invention principle, it is also possible to make
Some improvement and modification, these improve and modification also should be regarded as protection scope of the present invention.
Claims (17)
1. a multi-online air-conditioning system, it is characterised in that: include compressor (1), outdoor heat exchanger (2),
Indoor heat exchanger (3), cross valve (4), edema caused by disorder of QI (5), subcooler (6) and supercool expansion valve (15),
Wherein between low pressure line and the pressure duct of described subcooler (6), in the way of being in parallel, connect setting
There are the first branch road (7) and the second branch road (8), the shape that the first branch road (7) is internal to run through edema caused by disorder of QI (5)
Formula is arranged, and edema caused by disorder of QI (5) is internally provided with heat-exchanger rig (9), also includes controlling the first branch road (7)
With in the second branch road (8) one of connect, another disconnect control device.
Multi-online air-conditioning system the most according to claim 1, it is characterised in that: described first branch road (7)
With the described subcooler (6) that described second branch road (8) is arranged on described supercool expansion valve (15) side
Between low pressure line and pressure duct.
3. according to the multi-online air-conditioning system one of claim 1-2 Suo Shu, it is characterised in that: described control
Device is the three-way valve (10) being arranged on described first branch road (7) and described second branch road (8) phase junction.
Multi-online air-conditioning system the most according to claim 3, it is characterised in that: described three-way valve (10)
It is arranged in two phase contacts of described first branch road (7) and described second branch road (8) described in being relatively distant from
The position of one of them of subcooler (6).
5. according to the multi-online air-conditioning system one of claim 1-4 Suo Shu, it is characterised in that: described heat exchange
Device (9) is arranged on described first branch road (7) position through described edema caused by disorder of QI (5) inside, with
The cold-producing medium that described first branch road (7) is internal is carried out heat exchange.
Multi-online air-conditioning system the most according to claim 5, it is characterised in that: described heat-exchanger rig (9)
For electrical heating wire.
7. according to the multi-online air-conditioning system one of claim 1-6 Suo Shu, it is characterised in that: described compression
Machine (1) is low-temperature enthalpy-increasing compressor, and connects on the low tension outlet end also branch ground of described subcooler (6)
There were cold loop (11) and Gas-supplying enthalpy-increasing pipeline (12).
Multi-online air-conditioning system the most according to claim 7, it is characterised in that: described cold loop (11) excessively
One end be connected with one end of described Gas-supplying enthalpy-increasing pipeline (12), described cross cold loop (11) the other end
It is connected on the air inlet pipeline of described edema caused by disorder of QI (5).
Multi-online air-conditioning system the most according to claim 8, it is characterised in that: described Gas-supplying enthalpy-increasing pipe
The other end on road (12) is connected to the inside of described compressor (1).
10. according to the multi-online air-conditioning system one of claim 7-9 Suo Shu, it is characterised in that: in described mistake
Be provided with its break-make of control on cold loop (11) crosses low temperature valve (13)；And/or, at described Gas-supplying enthalpy-increasing pipe
Increasing enthalpy valve (14) controlling its break-make it is provided with on road (12).
The control method of 11. 1 kinds of multi-online air-conditioning systems, it is characterised in that: use claim 1-10 it
Multi-online air-conditioning system described in one, is in it under different conditions of indoor refrigeration or indoor heating and carries out point
Control and regulation are switched over when Kong Zhitiaojie and it not switched between different conditions.
The control method of 12. multi-online air-conditioning systems according to claim 11, it is characterised in that: when
During indoor refrigeration, regulate described control device and make the disconnection of described first branch road (7), described second branch road
(8) connect.
The control method of 13. multi-online air-conditioning systems according to claim 12, it is characterised in that: when
Described system included cold loop (11), Gas-supplying enthalpy-increasing pipeline (12), and crossed low temperature valve (13) and increase enthalpy valve
(14), time, control described low temperature valve (13) excessively and open to connect described cold loop (11) excessively, control to increase enthalpy
Valve (14) cuts out to disconnect described Gas-supplying enthalpy-increasing pipeline (12).
The control method of 14. multi-online air-conditioning systems according to claim 11, it is characterised in that: when
When indoor heating and outdoor environment temperature are higher than-15 DEG C, regulate described control device and make described first branch road
(7) disconnect, described second branch road (8) is connected.
The control method of 15. multi-online air-conditioning systems according to claim 14, it is characterised in that: when
Described system included cold loop (11), Gas-supplying enthalpy-increasing pipeline (12), and crossed low temperature valve (13) and increase enthalpy valve
(14) time, control described cross low temperature valve (13) close with disconnect described cross cold loop (11), control increase enthalpy
Valve (14) is opened to connect described Gas-supplying enthalpy-increasing pipeline (12).
The control method of 16. multi-online air-conditioning systems according to claim 11, it is characterised in that: when
When indoor heating and outdoor environment temperature are less than-15 DEG C, regulate described control device and make described first branch road
(7) connect, the second branch road (8) disconnects.
The control method of 17. multi-online air-conditioning systems according to claim 16, it is characterised in that: when
Described system included cold loop (11), Gas-supplying enthalpy-increasing pipeline (12), and crossed low temperature valve (13) and increase enthalpy valve
(14) time, control described cross low temperature valve (13) close with disconnect described cross cold loop (11), control increase enthalpy
Valve (14) is opened to connect described Gas-supplying enthalpy-increasing pipeline (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610311178.7A CN105972717B (en) | 2016-05-11 | 2016-05-11 | A kind of multi-online air-conditioning system and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610311178.7A CN105972717B (en) | 2016-05-11 | 2016-05-11 | A kind of multi-online air-conditioning system and its control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105972717A true CN105972717A (en) | 2016-09-28 |
| CN105972717B CN105972717B (en) | 2018-11-02 |
Family
ID=56991636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610311178.7A Active CN105972717B (en) | 2016-05-11 | 2016-05-11 | A kind of multi-online air-conditioning system and its control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105972717B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107747826A (en) * | 2017-11-13 | 2018-03-02 | 珠海格力电器股份有限公司 | Air-conditioning system |
| CN108061409A (en) * | 2016-11-07 | 2018-05-22 | 特灵国际有限公司 | For the variable orifice of chiller unit |
| CN109386909A (en) * | 2018-10-22 | 2019-02-26 | 广东美的暖通设备有限公司 | Outdoor unit, method for controlling oil return and air conditioner |
| CN109405233A (en) * | 2018-10-08 | 2019-03-01 | 珠海格力电器股份有限公司 | Control equipment, method, air-conditioning and the storage medium of air-conditioning |
| 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 (6)
| 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 |
| US5927088A (en) * | 1996-02-27 | 1999-07-27 | Shaw; David N. | Boosted air source heat pump |
| 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 |
-
2016
- 2016-05-11 CN CN201610311178.7A patent/CN105972717B/en active Active
Patent Citations (6)
| 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 |
| US5927088A (en) * | 1996-02-27 | 1999-07-27 | Shaw; David N. | Boosted air source heat pump |
| 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 |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061409A (en) * | 2016-11-07 | 2018-05-22 | 特灵国际有限公司 | For the variable orifice of chiller unit |
| US11105544B2 (en) | 2016-11-07 | 2021-08-31 | Trane International Inc. | Variable orifice for a chiller |
| CN107747826A (en) * | 2017-11-13 | 2018-03-02 | 珠海格力电器股份有限公司 | Air-conditioning system |
| CN107747826B (en) * | 2017-11-13 | 2023-10-13 | 珠海格力电器股份有限公司 | Air Conditioning System |
| CN109405233A (en) * | 2018-10-08 | 2019-03-01 | 珠海格力电器股份有限公司 | Control equipment, method, air-conditioning and the storage medium of air-conditioning |
| 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 |
| CN109386909A (en) * | 2018-10-22 | 2019-02-26 | 广东美的暖通设备有限公司 | Outdoor unit, method for controlling oil return and air conditioner |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105972717B (en) | 2018-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105972717A (en) | Variable refrigerant volume air conditioning system and control method thereof | |
| CN206919454U (en) | Heat exchanger and air-conditioning device for air-conditioning device | |
| WO2019128516A1 (en) | Air conditioner system | |
| CN109028413A (en) | A kind of integrated multiple unit of combination multi-source and its control method | |
| CN203375758U (en) | Refrigerating cycle system | |
| CN107178833A (en) | The outer machine system of recuperation of heat and air-conditioning system | |
| CN206094634U (en) | One drags two air conditioning system | |
| CN108679868B (en) | Self-operated multifunctional heat pump system and control method thereof | |
| CN104154692A (en) | Novel air supply and enthalpy increasing system and control method thereof | |
| CN104006584A (en) | Triple-regulation air conditioner and refrigerant flowing direction switching device thereof | |
| CN204494894U (en) | Heat pump type air conditioning system | |
| CN207006398U (en) | The outer machine system of recuperation of heat and air-conditioning system | |
| CN106016808B (en) | Air-conditioning system and its control method | |
| CN205783233U (en) | A kind of ultra low temperature overlapping formula heating unit | |
| CN208735815U (en) | A kind of integrated multiple unit of combination multi-source | |
| CN109539620B (en) | Air conditioning system | |
| CN108061404A (en) | A kind of two-way mixed working fluid heat pump system | |
| CN207702631U (en) | Air conditioner cooling cycle system and air conditioner | |
| CN207416860U (en) | For the air source heat pump system with second vapor injection of rail vehicle | |
| CN104236146A (en) | Refrigerating circulation system | |
| CN215930176U (en) | Refrigerating system | |
| CN108375255A (en) | Air-conditioner system | |
| CN205807705U (en) | A kind of multiple branch circuit heat pipe hot pump hybrid system | |
| CN108988109A (en) | Dual temperature water cooling unit for laser | |
| CN109869942B (en) | Flat pipe sleeve type heat recovery heat pump air conditioning system and working method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190823 Address after: 410600 168 Yongjia Road, Ningxiang Economic Development Zone, Changsha City, Hunan Province Co-patentee after: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI Patentee after: CHANGSHA GREE HVAC EQUIPMENT Co.,Ltd. Address before: Xiangzhou District of Guangdong city in Zhuhai province 519070 Qianshan No. 789 Patentee before: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI |