CN105509364B - Air conditioning system and air injection superheat degree adjusting method - Google Patents
Air conditioning system and air injection superheat degree adjusting method Download PDFInfo
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- CN105509364B CN105509364B CN201610072798.XA CN201610072798A CN105509364B CN 105509364 B CN105509364 B CN 105509364B CN 201610072798 A CN201610072798 A CN 201610072798A CN 105509364 B CN105509364 B CN 105509364B
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- increasing enthalpy
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title abstract description 10
- 238000002347 injection Methods 0.000 title description 2
- 239000007924 injection Substances 0.000 title description 2
- 230000001502 supplementing effect Effects 0.000 claims abstract description 31
- 230000001172 regenerating effect Effects 0.000 claims description 47
- 239000007788 liquid Substances 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 1
- 238000010257 thawing Methods 0.000 abstract description 14
- 238000005338 heat storage Methods 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 description 40
- 239000007789 gas Substances 0.000 description 25
- 238000010438 heat treatment Methods 0.000 description 12
- 238000009825 accumulation Methods 0.000 description 8
- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000007906 compression Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- -1 therefore Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/24—Storage receiver heat
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioning system and a jet superheat adjusting method, wherein the air conditioning system further comprises: the heat storage device is connected in series between the compressor and the condenser; the flow direction switching device is arranged on a main loop of the air conditioning system and used for switching the flow direction of the evaporator communicated with the inlet end and the outlet end of the compressor; the defrosting pipeline is connected between the output end of the condenser and one end of the flow direction switching device, and the heat storage device is connected to the defrosting pipeline; a defrosting expansion valve is connected in series on the defrosting pipeline, one end of the defrosting expansion valve is connected with the evaporator, and the other end of the defrosting expansion valve is connected with the heat storage device; the system comprises a subcooler arranged between the condenser and the main loop expansion valve, a first enthalpy-increasing pipeline connected with the subcooler and an enthalpy-increasing expansion valve arranged on the first enthalpy-increasing pipeline, wherein the first enthalpy-increasing pipeline penetrates through the heat storage device and is connected with an air supplementing port of the compressor. The air conditioning system improves the use comfort; the running reliability of the compressor and the air conditioning system is ensured.
Description
Technical field
The present invention relates to technical field of heat exchange equipment, more particularly to a kind of air-conditioning system and jet degree of superheat adjusting method.
Background technology
For air-cooled air conditioning system in the lower heating operation of outdoor temperature, the heat exchanger as evaporator is located at room
Outside, it with air heat-exchange, is easy in surface frosting.Especially finned heat exchanger influences evaporator easily in fin surface frosting
Heat exchange efficiency, to influence the heating effect and operational reliability of air-conditioning system.
Currently, common defrost mode is：It is commutated using four-way valve, makes air-conditioning system reverse cycle defrosting.But in defrost
In the process, the heat exchanger for being located at indoor unit is in heat absorption state, i.e., is used as evaporator.The water temperature inside of indoor set heat exchanger
Fluctuation is very big, seriously affects user's usage comfort.
Also, subcooler is provided in air-conditioning system so that air-conditioning obtains higher refrigeration (heat) amount, while improving system
Efficiency.But the air-conditioning system with subcooler has that the jet degree of superheat is out of control, such as the jet degree of superheat is subcooled or is negative
Value.Aperture by adjusting air injection enthalpy-increasing electric expansion valve has the function that adjust the jet degree of superheat, but this adjusting method has
There is certain hysteresis quality, the jet degree of superheat is longer by bearing positive regulating time, once there is no the shape of the jet degree of superheat (hydrojet)
The state duration is longer, can cause extreme influence to compressor and unit operation reliability.
Therefore, how usage comfort is improved, it is ensured that compressor and air-conditioning system operational reliability become art technology
Personnel's important technological problems urgently to be resolved hurrily.
Invention content
In view of this, the present invention provides a kind of air-conditioning system, to improve usage comfort, it is ensured that compressor and air-conditioning system
System operational reliability.
To achieve the above object, the present invention provides the following technical solutions：
A kind of air-conditioning system includes the evaporator positioned at major loop, compressor, condenser and main circuit expansion valve, also wraps
It includes：
Regenerative apparatus, the regenerative apparatus are series between the compressor and the condenser；
It is set on the major loop of the air-conditioning system, the input end of the compressor is connected to for switching the evaporator
And outlet end flows to switching device；
The defrost pipeline being connected between the output end of the condenser and described one end for flowing to switching device, the storage
Thermal is connected on the defrost pipeline；It is connected with defrost expansion valve on the defrost pipeline, the one of the defrost expansion valve
End is connect with the evaporator, and the other end of the defrost expansion valve is connect with the regenerative apparatus；
It is set to the first increasing of the subcooler, the connection subcooler between the condenser and the main circuit expansion valve
Enthalpy pipeline and the increasing enthalpy expansion valve being set on the first increasing enthalpy pipeline, the first increasing enthalpy pipeline pass through the regenerative apparatus
And it is connect with the gas supplementing opening of the compressor.
Preferably, in above-mentioned air-conditioning system, further include：
Second increasing enthalpy pipeline, one end of the second increasing enthalpy pipeline are connected to the first increasing enthalpy pipeline and are located at the subcooler
With the pipeline section between the regenerative apparatus, the other end is connected to the gas supplementing opening of the compressor；
Switch the first increasing enthalpy pipeline and is pierced by leading between the pipeline section of the subcooler and the gas supplementing opening of the compressor
The increasing enthalpy switching device of break-make between the disconnected and described second increasing enthalpy pipeline and the gas supplementing opening of the compressor.
Preferably, in above-mentioned air-conditioning system, the increasing enthalpy switching device includes be arranged on the first increasing enthalpy pipeline
The second solenoid valve being arranged on one solenoid valve and the second increasing enthalpy pipeline.
Preferably, in above-mentioned air-conditioning system, the increasing enthalpy switching device is electric T-shaped valve.
Preferably, further include the gas supplementing opening positioned at the compressor, for detecting the jet degree of superheat in above-mentioned air-conditioning system
Pressure-detecting device and temperature-detecting device.
Preferably, in above-mentioned air-conditioning system, one end of the first increasing enthalpy pipeline is connected to the subcooler and the master
On pipeline section between circuit expansion valve.
Preferably, in above-mentioned air-conditioning system, one end of the first increasing enthalpy pipeline be connected to the subcooler with it is described cold
On pipeline section between condenser.
Preferably, in above-mentioned air-conditioning system, the regenerative apparatus is connected in series on the output channel of the compressor.
Preferably, further include the electric heater unit being set on the input channel of the compressor in above-mentioned air-conditioning system.
Preferably, further include being set on the input channel, for detecting the compressor in above-mentioned air-conditioning system
The pressure-detecting device and temperature-detecting device of suction superheat.
Preferably, further include the gas-liquid separator being set on the input channel of the compressor in above-mentioned air-conditioning system；
The gas-liquid separator is connected in series on the defrost pipeline.
Preferably, in above-mentioned air-conditioning system, the switching device that flows to is electric T-shaped valve.
Preferably, in above-mentioned air-conditioning system, the switching device that flows to includes two solenoid valves, is respectively set to described
The first solenoid valve between the other end of evaporator and the outlet end of the compressor and the other end for being set to the evaporator
Second solenoid valve between the input end of the compressor.
The present invention also provides a kind of adjusting methods of the jet degree of superheat of air-conditioning system, including step：
1) zone of reasonableness of set temperature parameter a, b, c and d, a≤b≤c≤d, jet degree of superheat t are b~c；
2) the jet degree of superheat t of the gas supplementing opening of the compressor is detected, and is compared with the temperature parameter of setting；
3) as b≤t≤c, the first solenoid valve is fully closed, second solenoid valve standard-sized sheet；
As t≤a, the first solenoid valve standard-sized sheet, second solenoid valve is fully closed, and as c≤t≤d, the first solenoid valve (12) is fully closed,
Second solenoid valve standard-sized sheet；
As a ＜ t≤b, the first solenoid valve is gradually opened, and second solenoid valve progressively closes off, until when b ＜ t≤c, first
Solenoid valve is fully closed, second solenoid valve standard-sized sheet；
As t >=c, the first solenoid valve is fully closed, second solenoid valve standard-sized sheet.
It can be seen from the above technical proposal that air-conditioning system provided by the invention, in heating operations, defrost expansion valve closes
It closes and the unlatching of main circuit expansion valve, flows to the state that switching device switches to the input end of evaporator connection compressor.Compressor
Heat be delivered to regenerative apparatus, regenerative apparatus accumulation heat；Then, fluid enters condenser condensation heat release；Using leading back
Road expansion valve throttles；Evaporation endothermic in evaporator is finally entered, is then back into and is compressed through compressor.First increasing enthalpy
After fluid in pipeline cools down to the fluid in major loop, compressor is flowed into after regenerative apparatus absorbs heat, is effectively avoided
Flow into the increasing enthalpy fluid of compressor because the jet degree of superheat is too low or for negative value the problem of, improve the control to the jet degree of superheat
System, it is ensured that compressor and air-conditioning system operational reliability.
During defrost, defrost expansion valve is opened and main circuit expansion valve is closed, and is flowed to switching device and is switched to evaporation
Device is connected to the state of the outlet end of compressor.High temperature fluid (high-temperature exhaust air) in the output channel of compressor enter evaporator into
Row condensation heat release；It enters back into defrost pipeline, is flow at regenerative apparatus after the throttling of defrost expansion valve, fluid carries accumulation of heat dress
The heat for setting accumulation flow to the input end of compressor, then enters evaporator by the output channel of compressor and carry out condensation heat release.It is logical
It crosses fluid to be condensed in evaporator, plays the role of the defrosting to evaporator.
Air-conditioning system provided by the invention avoids the operation of the setting reverse defrost of four-way valve by setting regenerative apparatus,
Avoid the case where condenser of heating indoor is used as evaporator.Therefore, it avoids and is flowed in condenser during defrosting
The decline of the temperature of body effectively increases the usage comfort of user；Also, improve the control to the jet degree of superheat, it is ensured that
Compressor and air-conditioning system operational reliability.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the first structural schematic diagram of air-conditioning system provided in an embodiment of the present invention；
Fig. 2 is second of structural schematic diagram of air-conditioning system provided in an embodiment of the present invention；
Fig. 3 is the third structural schematic diagram of air-conditioning system provided in an embodiment of the present invention；
Fig. 4 is the 4th kind of structural schematic diagram of air-conditioning system provided in an embodiment of the present invention.
Specific implementation mode
The present invention provides a kind of air-conditioning systems, to improve usage comfort, it is ensured that compressor and air-conditioning system operation can
By property.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is the first structural schematic diagram of air-conditioning system provided in an embodiment of the present invention.
An embodiment of the present invention provides a kind of air-conditioning systems, including evaporator 1, compressor 6, regenerative apparatus 5, defrost pipe
Road, defrost expansion valve 2, the first increasing enthalpy pipeline, increasing enthalpy expansion valve 13, subcooler 10, flows to switching device and leads back condenser 4
Road expansion valve 3.Evaporator 1, compressor 6, condenser 4, main circuit expansion valve 3 and flow to the master that switching device is located at air-conditioning system
On circuit, regenerative apparatus 5, regenerative apparatus 5 is series between compressor 6 and condenser 4；Flow to switching device for switch evaporation
Device 1 is connected to input end and the outlet end of compressor 6.Defrost piping connection in the connecting pin of evaporator 1 and main circuit expansion valve 3 and
The input end of compressor 6.Regenerative apparatus 5 is connected on defrost pipeline, in fluid heat exchange occur in the regenerative apparatus 5 inhale
Heat.Defrost expansion valve 2 is connected on defrost pipeline, one end of defrost expansion valve 2 is connect with evaporator 1, defrost expansion valve 2 it is another
One end is connect with regenerative apparatus 5.
Subcooler 10 is set between condenser 4 and main circuit expansion valve 3, the first increasing enthalpy piping connection subcooler 10, is increased
Enthalpy expansion valve 13 is set on the first increasing enthalpy pipeline, and the first increasing enthalpy pipeline passes through regenerative apparatus 5 and connects with the gas supplementing opening of compressor 6
It connects.
Air-conditioning system provided in an embodiment of the present invention, in heating operations, defrost expansion valve 2 is closed and main circuit expansion valve
3 open, and flow to switching device and switch to the state that evaporator 1 is connected to the input end of compressor 6.The heat of compressor 6 is delivered to
Regenerative apparatus 5,5 accumulation heat of regenerative apparatus；Then, fluid enters condenser condensation heat release；Using main circuit expansion valve 3 into
Row throttling；Evaporation endothermic in evaporator 1 is finally entered, is then back into and is compressed through compressor 6.In first increasing enthalpy pipeline
After fluid cools down to the fluid in major loop, compressor 6 is flowed into after the heat absorption of regenerative apparatus 5, effectively prevents flowing into
The increasing enthalpy fluid of compressor 6 because the jet degree of superheat is too low or for negative value the problem of, improve the control to the jet degree of superheat, it is ensured that
Compressor and air-conditioning system operational reliability.
During defrost, defrost expansion valve 2 is opened and main circuit expansion valve 3 is closed, and is flowed to switching device and is switched to steaming
Send out the state that device 1 is connected to the outlet end of compressor 6.High temperature fluid (high-temperature exhaust air) in the output channel of compressor 6, which enters, to be steamed
Hair device 1 carries out condensation heat release；It enters back into defrost pipeline, is flow at regenerative apparatus 5 after the throttling of defrost expansion valve 2, fluid
The heat for carrying 5 accumulation of regenerative apparatus flow to the input end of compressor 6, then by the output channel of compressor 6 enter evaporator 1 into
Row condensation heat release.It is condensed in evaporator 1 by fluid, plays the role of the defrosting to evaporator 1.
Air-conditioning system provided in an embodiment of the present invention avoids the setting reverse defrost of four-way valve by the way that regenerative apparatus 5 is arranged
Operation also avoids the case where condenser 4 of heating indoor is used as evaporator.Therefore, it avoids cold during defrosting
The decline of the temperature of fluid in condenser 4, effectively increases the usage comfort of user；Also, it improves to the jet degree of superheat
Control, it is ensured that compressor and air-conditioning system operational reliability.
It should be noted that solid arrow direction is the flow direction of fluid in heating operations in figure, dotted arrow is defrost
The flow direction of fluid in journey.The major loop flow direction of air-conditioning system is successively by compressor 6, the output channel of compressor, condenser
4, main circuit expansion valve 3, evaporator 1, the input channel of compressor and compressor 6 circulate structure.
Air-conditioning system provided in an embodiment of the present invention further includes the second increasing enthalpy pipeline and increasing enthalpy switching device, the second increasing enthalpy pipe
The one end on road is connected to pipeline section of the first increasing enthalpy pipeline between subcooler 10 and regenerative apparatus 5, the other end and compressor 6
Gas supplementing opening is connected to；Increasing enthalpy switching device control the first increasing enthalpy pipeline be pierced by the pipeline section of subcooler 10 and compressor 6 gas supplementing opening it
Between break-make and the second increasing enthalpy pipeline and the gas supplementing opening of compressor 6 between break-make.By increasing enthalpy switching device, subcooler is realized
Whether the fluid of 10 outflows passes through regenerative apparatus 5.When needing to heat by regenerative apparatus 5, the first increasing enthalpy pipeline connection；When not
When needing to heat by regenerative apparatus 5, the second increasing enthalpy pipeline connection.
In the present embodiment, increasing enthalpy switching device includes that the first solenoid valve 12 and second being arranged on the first increasing enthalpy pipeline increases
The second solenoid valve 11 being arranged on enthalpy pipeline.It is real by controlling unlatching and closing for the first solenoid valve 12 and second solenoid valve 11
The adjusting of the break-make and open degree of existing corresponding the first increasing enthalpy pipeline and the second increasing enthalpy pipeline improves and adjusts jet overheat
The precision of degree.
It can also set increasing enthalpy switching device to electric T-shaped valve, be respectively communicated with subcooler 10, regenerative apparatus 5 and compression
The gas supplementing opening of machine 6 passes through the switching of electric T-shaped valve, the gas supplementing opening and regenerative apparatus 5 and pressure of realization subcooler 10 and compressor 6
The connection of the gas supplementing opening of contracting machine 6.Preferably, electric T-shaped valve can be adjusted between subcooler 10 and the gas supplementing opening of compressor 6
The open degree of pipeline between pipeline open degree and regenerative apparatus 5 and the gas supplementing opening of compressor 6.Only need one electric three passes of setting
Switching effect can be completed in valve, facilitates system installation.
By taking increasing enthalpy switching device includes the first solenoid valve 12 and second solenoid valve 11 as an example.First solenoid valve 12 and the second electricity
Magnet valve 11 may be at the state fully open or fully closed, and can also be in the state of aperture regulation.For the ease of first
The aperture of solenoid valve 12 and second solenoid valve 11 further includes being located in order to further increase the precision for adjusting the jet degree of superheat
The gas supplementing opening of compressor 6, pressure-detecting device and temperature-detecting device for detecting the jet degree of superheat.It is examined by the way that pressure is arranged
Device and temperature-detecting device are surveyed, effectively detects jet degree of superheat t.
As shown in Figures 1 and 3, in both embodiments, one end of the first increasing enthalpy pipeline is connected to subcooler 10 and master
On pipeline section between circuit expansion valve 3.Liquid structure is taken that is, subcooler 10 is downstream, is returned based on the fluid in the first increasing enthalpy pipeline
The part that fluid in road is diverted after subcooler 10.
As shown in Figures 2 and 4, in both embodiments, one end of the first increasing enthalpy pipeline be connected to subcooler 10 with it is cold
On pipeline section between condenser 4.That is, subcooler 10, which is upstream, takes liquid structure, the fluid in the first increasing enthalpy pipeline is in major loop
The part that fluid is diverted before by subcooler 10.
As shown in Figures 1 and 2, in both embodiments, regenerative apparatus 5 is arranged independently of each other with compressor 6.Wherein,
Regenerative apparatus 5 is connected in series on the output channel of compressor 6, the heat of the fluid in output channel in order to absorb compressor 6.
Facilitate the maintenance maintenance of the two.
As shown in Figures 3 and 4, in both embodiments, regenerative apparatus 5 is wrapped in around compressor 6.Pass through recycling
The waste heat that compressor 6 is sent out, accumulation of heat is in regenerative apparatus 5.
Preferably, subcooler 10 is economizer.
In order to improve accumulation of heat effect, phase change heat storage material is provided in regenerative apparatus 5.It can also be set in regenerative apparatus 5
The non-phase change heat storage material such as water is set, accumulation of heat can be equally played the role of, is not particularly limited herein and within protection domain.
Condenser 4 is full-liquid type case tube heat exchanger.Without using condenser 4 as evaporator when due to defrosting,
Full-liquid type case tube heat exchanger can be used, there is no full-liquid type case tube heat exchangers when use the reverse defrost of four-way Vavle switching as steaming
When sending out device the problem of system oil return.Compared with dry type package device, heating effect is effectively increased.It is of course also possible to use dry
Formula package device or other heat-exchanger rigs are as condenser 4, it is only necessary to ensure to meet heating needs.
Air-conditioning system provided in an embodiment of the present invention further includes the electric heater unit being set on the input channel of compressor 6
7.By the way that electric heater unit 7 is arranged, the fluid to flowing into compressor 6 heats, it is ensured that enters compressor 6 during defrosting
Fluid suction superheat, and then ensure compressor reliability service.
In order to avoid electric heater unit 7 is opened when fluid meets suction superheat, electric energy is saved, air-conditioning system further includes
It is set on input channel, the pressure sensor and temperature sensor of the suction superheat for detecting compressor 6.In defrosting shape
Under state, the pressure and temperature of fluid in input channel are detected by pressure sensor and temperature sensor, obtains suction superheat
Degree.When detected value is met the requirements, then electric heater unit 7 does not have to open, and fluid flows directly into compressor 6；When detected value is less than
When required value, then electric heater unit 7 is opened, flows into compressor 6 after being heated to fluid again, suction superheat has been effectively ensured
Demand, and then ensure that the reliability of compressor.
In order to make compressor stable operation, avoid compressor 6 with hydraulic compression, air-conditioning system further includes being set to compressor 6
Input channel on gas-liquid separator 8；Gas-liquid separator 8 is connected in series on defrost pipeline.It is understood that in heating operations
In, fluid also needs to flow into compressor 6 again by gas-liquid separator 8.In the present embodiment, defrost process and heating operations
In, fluid is required to flow into compressor 6 again by gas-liquid separator 8, effectively prevents the case where compressor 6 is with hydraulic compression, carries
Its high safety in utilization.
As shown in Figure 1, for the ease of assembly, amount of parts is reduced, it is electric T-shaped valve 9 to flow to switching device.I.e..Three
The first end of port valve 9 is connected to the other end of evaporator 1, and second end is connected to the input end of compressor 6, third end and compressor
6 outlet end.
As shown in figure 4, in the 4th kind of embodiment, it includes two solenoid valves to flow to switching device, is respectively set to steaming
It sends out the first solenoid valve 15 between the other end and the outlet end of compressor 6 of device 1 and is set to the other end and the compression of evaporator 1
Second solenoid valve 16 between the input end of machine 6.During defrost, the first solenoid valve 15 is opened and second solenoid valve 16 is closed
It closes；In heating operations, the first solenoid valve 15 is closed and second solenoid valve 16 is opened.By being provided separately, maintenance dimension is facilitated
Repair operation.
The embodiment of the present invention additionally provides a kind of adjusting method of the jet degree of superheat of air-conditioning system, wherein air-conditioning system
Further include the second increasing enthalpy pipeline, one end of the second increasing enthalpy pipeline is connected to the first increasing enthalpy pipeline and is located at subcooler 10 and regenerative apparatus 5
Between pipeline section, the other end is connected to the gas supplementing opening of compressor 6；Switch the first increasing enthalpy pipeline and the second increasing enthalpy pipeline circulation
Increasing enthalpy switching device.Increasing enthalpy switching device includes on the first solenoid valve 12 and the second increasing enthalpy pipeline being arranged on the first increasing enthalpy pipeline
The second solenoid valve 11 of setting.Wherein, including step：
S1：Set temperature parameter a, b, c and d, the zone of reasonableness of a≤b≤c≤d, the jet degree of superheat are b~c；That is, b≤t
≤c。
S2：The jet degree of superheat t of the gas supplementing opening of compressor 6 is detected, and is compared with the temperature parameter of setting；It is preferred that
Ground, the detection for the gas supplementing opening jet degree of superheat t of compressor 6, for detection in real time.The predetermined time can also be spaced to compressor
The detection of 6 gas supplementing opening jet degree of superheat t.
S3：As b≤t≤c, the first solenoid valve 12 is fully closed, 11 standard-sized sheet of second solenoid valve；At this point, the jet degree of superheat is being closed
It manages in range, the fluid without the gas supplementing opening to flowing into compressor 6 heats, in this state, by the stream of subcooler 10
Body is all flowed into the gas supplementing opening of compressor 6 by the second increasing enthalpy pipeline.
As t≤a, 12 standard-sized sheet of the first solenoid valve, second solenoid valve 11 is fully closed, and as c≤t≤d, the first solenoid valve 12 is gradually
It closes, second solenoid valve 11, which is gradually opened, arrives greatly maximum opening；As t≤a, the too low even negative values of jet degree of superheat t, in this shape
It under state, needs to improve jet degree of superheat t as early as possible, therefore, all flows into the first increasing enthalpy pipeline by the fluid of subcooler 10, flow through
Regenerative apparatus 5 flows into the gas supplementing opening of compressor 6 after absorbing heat.As fluid absorbs the heat of regenerative apparatus 5, jet degree of superheat t liters
Temperature after the temperature of jet degree of superheat t is more than zone of reasonableness, then adjusts the first solenoid valve 12 and second solenoid valve until c≤t≤d
11 aperture, reduce the first increasing enthalpy pipeline fluid flow, increase the second increasing enthalpy pipeline fluid flow, until fluid all by
Second increasing enthalpy pipeline flows into the gas supplementing opening of compressor 6.
As a ＜ t≤b, the first solenoid valve 12 is gradually opened, and second solenoid valve 11 progressively closes off, until when b ＜ t≤c,
First solenoid valve 12 progressively closes off, and second solenoid valve 11, which is gradually opened, arrives greatly maximum opening；As a ＜ t≤b, jet degree of superheat t compared with
It is low, it needs slowly to adjust temperature, avoids temperature adjustment excessive velocities and jet degree of superheat t is made to adjust excessively.Therefore, the first electricity
Magnet valve 12 is gradually opened, and second solenoid valve 11 progressively closes off, until b ＜ t≤c, the jet degree of superheat in the reasonable scope, then first
Solenoid valve 12 progressively closes off, and second solenoid valve 11, which is gradually opened, arrives greatly maximum opening.
As t >=c, the first solenoid valve 12 is fully closed, 11 standard-sized sheet of second solenoid valve.In this case, the temperature of jet degree of superheat t
Degree is higher, and without being heated to fluid, therefore, fluid is all flowed into the gas supplementing opening of compressor 6 by the second increasing enthalpy pipeline.
By the adjusting method for the jet degree of superheat that above-described embodiment provides, the jet degree of superheat is fast and effectively completed
It adjusts.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (13)
1. a kind of air-conditioning system includes the evaporator (1) positioned at major loop, compressor (6), condenser (4) and main circuit expansion
Valve (3), which is characterized in that further include：
Regenerative apparatus (5), the regenerative apparatus (5) are series between the compressor (6) and the condenser (4)；
It is set on the major loop of the air-conditioning system, the import of the compressor (6) is connected to for switching the evaporator (1)
End and outlet end flow to switching device；
Be connected to the evaporator (1) and the main circuit expansion valve (3) connecting pin and the compressor (6) input end it
Between defrost pipeline, the regenerative apparatus (5) is connected on the defrost pipeline；Defrost expansion is connected on the defrost pipeline
One end of valve (2), the defrost expansion valve (2) is connect with the evaporator (1), the other end of the defrost expansion valve (2) with
Regenerative apparatus (5) connection；
It is set to the subcooler (10) between the condenser (4) and the main circuit expansion valve (3), connect the subcooler
(10) the first increasing enthalpy pipeline and the increasing enthalpy expansion valve (13) being set on the first increasing enthalpy pipeline, the first increasing enthalpy pipeline
It is connect across the regenerative apparatus (5) and with the gas supplementing opening of the compressor (6).
2. air-conditioning system according to claim 1, which is characterized in that further include：
Second increasing enthalpy pipeline, one end of the second increasing enthalpy pipeline are connected to the first increasing enthalpy pipeline and are located at the subcooler (10)
With the pipeline section between the regenerative apparatus (5), the other end is connected to the gas supplementing opening of the compressor (6)；
Switch the first increasing enthalpy pipeline to be pierced by between the pipeline section of the subcooler (10) and the gas supplementing opening of the compressor (6)
The increasing enthalpy switching device of break-make between break-make and the second increasing enthalpy pipeline and the gas supplementing opening of the compressor (6).
3. air-conditioning system according to claim 2, which is characterized in that the increasing enthalpy switching device includes first increasing enthalpy
The second solenoid valve (11) being arranged on the first solenoid valve (12) and the second increasing enthalpy pipeline being arranged on pipeline.
4. air-conditioning system according to claim 2, which is characterized in that the increasing enthalpy switching device is electric T-shaped valve.
5. air-conditioning system according to claim 2, which is characterized in that further include the gas supplementing opening positioned at the compressor (6),
Pressure-detecting device and temperature-detecting device for detecting the jet degree of superheat.
6. air-conditioning system according to claim 1, which is characterized in that one end of the first increasing enthalpy pipeline is connected to described
On pipeline section between subcooler (10) and the main circuit expansion valve (3).
7. air-conditioning system according to claim 1, which is characterized in that one end of the first increasing enthalpy pipeline is connected to described
On pipeline section between subcooler (10) and the condenser (4).
8. air-conditioning system according to claim 1, which is characterized in that the regenerative apparatus (5) is connected in series with the compressor
(6) on output channel.
9. air-conditioning system according to claim 1, which is characterized in that further include the input for being set to the compressor (6)
Electric heater unit (7) on pipeline.
10. air-conditioning system according to claim 9, which is characterized in that further include being set on the input channel, be used for
Detect the pressure-detecting device and temperature-detecting device of the suction superheat of the compressor (6).
11. air-conditioning system according to claim 1, which is characterized in that further include the input for being set to the compressor (6)
Gas-liquid separator (8) on pipeline；
The gas-liquid separator (8) is connected in series on the defrost pipeline.
12. according to claim 1-11 any one of them air-conditioning systems, which is characterized in that the switching device that flows to is electronic
Triple valve (9).
13. according to claim 1-11 any one of them air-conditioning systems, which is characterized in that the switching device that flows to includes two
A solenoid valve, the first electricity being respectively set between the other end of the evaporator (1) and the outlet end of the compressor (6)
Magnet valve and the second solenoid valve being set between the other end of the evaporator (1) and the input end of the compressor (6).
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| CN201610072798.XA CN105509364B (en) | 2016-02-02 | 2016-02-02 | Air conditioning system and air injection superheat degree adjusting method |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106440459A (en) * | 2016-10-26 | 2017-02-22 | 广东高而美制冷设备有限公司 | Auxiliary heating enthalpy-increasing heat pump system and working mode thereof |
| CN106288565A (en) * | 2016-10-31 | 2017-01-04 | 广东美的制冷设备有限公司 | Air-conditioning does not shut down defrosting system and method and air-conditioning |
| CN106705477B (en) * | 2016-12-20 | 2023-10-17 | 广东华天成新能源科技股份有限公司 | Constant water temperature defrosting jet enthalpy-increasing heat pump system |
| CN106766374B (en) * | 2016-12-20 | 2023-10-17 | 广东华天成新能源科技股份有限公司 | Jet enthalpy-increasing heat pump system capable of increasing water temperature and defrosting |
| CN108088116B (en) * | 2017-12-04 | 2018-12-11 | 珠海格力电器股份有限公司 | Heat pump system for increasing air supplement amount by utilizing heat recovery and control method thereof |
| CN109798701B (en) * | 2019-03-21 | 2023-09-12 | 珠海格力电器股份有限公司 | Air conditioner control system and method for continuous heating and air conditioner |
| CN110736207B (en) * | 2019-09-26 | 2022-04-15 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112665206A (en) * | 2019-10-16 | 2021-04-16 | 广东美的制冷设备有限公司 | Air conditioner and defrosting method thereof and readable storage medium |
| CN110645745A (en) * | 2019-10-23 | 2020-01-03 | 珠海格力电器股份有限公司 | Air conditioner capable of continuously heating and control method thereof |
| CN110836417A (en) * | 2019-11-18 | 2020-02-25 | 珠海格力电器股份有限公司 | Air conditioner and air conditioner control method |
| CN114812017B (en) * | 2022-03-29 | 2023-09-05 | 广东开利暖通空调股份有限公司 | Enhanced vapor injection system and method of operating the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2641908A (en) * | 1950-09-02 | 1953-06-16 | Francis L La Porte | Refrigerator defrosting means |
| CN203629167U (en) * | 2013-06-13 | 2014-06-04 | 广东美的暖通设备有限公司 | Gas-liquid separation device and air conditioner |
| CN103486780A (en) * | 2013-09-13 | 2014-01-01 | 青岛海信日立空调系统有限公司 | Vapor-injected multi-connected air conditioning system |
| CN103542606B (en) * | 2013-10-31 | 2016-08-03 | Tcl空调器(中山)有限公司 | Heat pump type air conditioning system and control method thereof |
| CN203857702U (en) * | 2014-04-18 | 2014-10-01 | 青岛海信日立空调系统有限公司 | Air-supplying enthalpy-adding air conditioning system |
| CN203857718U (en) * | 2014-05-23 | 2014-10-01 | 青岛海尔空调电子有限公司 | Air-conditioning system |
| CN104879975A (en) * | 2015-06-15 | 2015-09-02 | 北京工业大学 | Hot-gas bypass and phase change heat storage combined defrosting system applied to refrigerator |
| CN205373119U (en) * | 2016-02-02 | 2016-07-06 | 珠海格力电器股份有限公司 | Air conditioning system |
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