CN104896813B - For the multi-line system of air-conditioning - Google Patents
For the multi-line system of air-conditioning Download PDFInfo
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- CN104896813B CN104896813B CN201510373707.1A CN201510373707A CN104896813B CN 104896813 B CN104896813 B CN 104896813B CN 201510373707 A CN201510373707 A CN 201510373707A CN 104896813 B CN104896813 B CN 104896813B
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- heat exchanger
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- air
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/06—Details of flow restrictors or expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a kind of multi-line system for air-conditioning, including：Intermediate Heat Exchanger；Compressor, the compressor have compression chamber and the air entry and intermediate fill gas mouth that are connected with the compression chamber；Gas-liquid separator, the gas-liquid separator have suction end and outlet side, and the outlet side is connected with the air entry of the compressor；Refrigerant main road and refrigerant bypass, the refrigerant main road and the refrigerant bypass carry out heat exchange through the Intermediate Heat Exchanger in the Intermediate Heat Exchanger；Branch flow passage, one end of the branch flow passage is connected with the refrigerant bypass and the other end is connected with the suction end of the gas-liquid separator.Multi-line system according to the present invention has excellent specific refrigerating effect and refrigerating capacity.
Description
Technical field
The present invention relates to field of household appliances, more particularly to a kind of multi-line system for air-conditioning.
Background technology
The generally multi-online air-conditioning system with supercooling apparatus, refrigerant is divided into two-way entrance after condenser comes out during refrigeration
Supercooling apparatus, main road refrigerant are directly entered supercooling apparatus, and bypass refrigerant, into supercooling apparatus, absorbs after throttling set throttles
The heat of main road refrigerant becomes gas, returns to compressor air suction end afterwards, and main road refrigerant is absorbed heat by bypass refrigerant to be condensed or cool down.
This multi-line system since bypass refrigerant returns to compressor air suction end, occupies a part of compressor air suction volume, makes compression
Machine be used for absorb evaporator come out gas aspirated volume reduce, so the refrigerating capacity of whole system have substantially increase or
Increase seldom.
The content of the invention
It is contemplated that it solves at least some of the technical problems in related technologies.For this purpose, the present invention
Purpose is to propose a kind of multi-line system for air-conditioning, which has excellent specific refrigerating effect and refrigeration energy
Power.
Multi-line system according to the present invention for air-conditioning, including：Intermediate Heat Exchanger；Compressor, the compression equipment
There are compression chamber and the air entry connected with the compression chamber and intermediate fill gas mouth；Gas-liquid separator, the gas-liquid separator have
Suction end and outlet side, the outlet side are connected with the air entry of the compressor；Refrigerant main road, one end of the refrigerant main road
It is connected with the outdoor heat exchanger of the air-conditioning, the other end of the refrigerant main road is connected with the indoor heat exchanger of the air-conditioning, institute
Refrigerant main road is stated through the Intermediate Heat Exchanger, the indoor heat exchanger and the outdoor heat exchanger respectively with the compressor phase
Even；Refrigerant bypass, the part of the refrigerant main road of one end of the refrigerant bypass and the upstream of the Intermediate Heat Exchanger or under
The part of the refrigerant main road of trip is connected, and the other end of the refrigerant bypass is connected with the intermediate fill gas mouth, the refrigerant
Bypass can simultaneously exchange heat through the Intermediate Heat Exchanger with the refrigerant main road；Branch flow passage, one end of the branch flow passage
It is connected with the refrigerant bypass and the other end is connected with the suction end of the gas-liquid separator.
Multi-line system according to the present invention for air-conditioning, by the way that the refrigerant in refrigerant bypass is imported into middle pressure chamber,
The aspirated volume of compressor can be not take up, improves the refrigerating capacity of system.
In addition, branch flow passage is set between the suction end of gas-liquid separator and refrigerant bypass, it can be in the row of compressor
Atmospheric pressure is excessively high or when compressor variable frequency module temperature is excessively high, and at least a portion refrigerant in refrigerant bypass is exported to gas-liquid point
From device.
In addition, the multi-line system according to the present invention for air-conditioning can also have following additional technical characteristic：
According to one embodiment of present invention, throttling set is provided on the refrigerant bypass, the throttling set is set
Between described one end of the refrigerant bypass and the Intermediate Heat Exchanger.
According to one embodiment of present invention, the branch flow passage, which is equipped with, controls what the branch flow passage opened or closed
First valve body, the refrigerant bypass are equipped with the second valve body for being used to open or closing the refrigerant bypass.
According to one embodiment of present invention, the first temperature sensor and second temperature are additionally provided on the refrigerant bypass
Sensor, first temperature sensor is arranged on the refrigerant bypass between the Intermediate Heat Exchanger and throttling set, described
Second temperature sensor is arranged on the refrigerant bypass between the Intermediate Heat Exchanger and compressor.
According to one embodiment of present invention, the multi-line system further includes：For detecting the exhaust of the compressor
The pressure-detecting device of pressure.
According to one embodiment of present invention, the position that the branch flow passage passes through first valve body and the refrigerant bypass
Pipeline portions connection between the Intermediate Heat Exchanger and second valve body.
According to one embodiment of present invention, the multi-line system further includes to detect compressor variable frequency module temperature
Three-temperature sensor, the compressor variable frequency module is arranged in electric-controlled box.
According to one embodiment of present invention, first valve body and second valve body are solenoid valve.
According to one embodiment of present invention, the second valve body is valve body open in usual.
According to one embodiment of present invention, the aperture of the throttling set is continuously adjustable.
According to one embodiment of present invention, the refrigerant temperature that first temperature sensor detects is Ta, described the
The refrigerant temperature that two temperature sensors detect is Tb, wherein Δ T=Tb-Ta, is less than the first preset value a and more than the in Δ T
It during two preset value b, keeps the aperture of the throttling set constant, when Δ T is more than or equal to the first preset value a, increases the section
The aperture of device is flowed, when Δ T is less than or equal to the first preset value b, the aperture of the reduction throttling set, wherein a ＞ b.
According to one embodiment of present invention, the pressure at expulsion Pd of the compressor is more than or equal to default pressure in the Pd
Power Pds, first valve body and second valve body are in opening state, when the Pd is less than Pds-C, first valve
Body is closed and second valve body is opened, and wherein C is constant, and C meets：0MPa≤C≤1.0MPa.
According to one embodiment of present invention, the compressor variable frequency module temperature is Tc, is more than or equal in the Tc pre-
If temperature Tcs, first valve body and second valve body are in opening state, when the Tc is less than Tcs-d, described the
One valve body is closed and second valve body is opened, and wherein d is constant, and d meets：0℃≤C≤20℃.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
It obtains substantially or is recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the schematic diagram of multi-line system according to embodiments of the present invention.
Reference numeral：
For the multi-line system 100 of air-conditioning,
Compressor 110, three-temperature sensor 112, pressure-detecting device 113, air entry 101, intermediate fill gas mouth 102,
Gas-liquid separator 120, suction end 103, outlet side 104,
Refrigerant main road 130, refrigerant bypass 140, the second valve body 141, the first temperature sensor 142, second temperature sensor
143,
Branch flow passage 150, the first valve body 151, Intermediate Heat Exchanger 160, outdoor heat exchanger 170, throttling set 180 are automatically controlled
Box 190.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or has the function of same or like element.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instructions such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be based on orientation shown in the drawings or
Position relationship is for only for ease of the description present invention and simplifies description rather than instruction or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, " multiple " are meant that at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be that machinery connects
It connects or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features contact directly or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward or is merely representative of fisrt feature level height less than second feature.
According to embodiments of the present invention is described in detail for the multi-line system 100 of air-conditioning with reference to Fig. 1.It should
Can work for the multi-line system 100 of air-conditioning under refrigeration or heating state, below with multi-line system refrigeration when
Working condition illustrates for example.
Multi-line system 100 for air-conditioning according to embodiments of the present invention can include Intermediate Heat Exchanger 160, compressor
110th, gas-liquid separator 120, refrigerant main road 130, refrigerant bypass 140 and branch flow passage 150.
Wherein, as shown in Figure 1, refrigerant main road 130 and refrigerant bypass 140 pass through Intermediate Heat Exchanger 160, refrigerant main road 130
Refrigerant in interior refrigerant and refrigerant bypass 140 can carry out heat exchange in Intermediate Heat Exchanger 160.
For example, can be hollow cavity in Intermediate Heat Exchanger 160, heat-conducting medium (for example, refrigerant) be full of in hollow cavity,
The heat of refrigerant in refrigerant main road 130 can be transferred to heat-conducting medium by refrigerant main road 130, and then the heat can pass through
The refrigerant bypass 140 contacted with heat-conducting medium is transferred in the refrigerant in refrigerant bypass 140, and then realizes refrigerant main road 130
The heat exchange between refrigerant in interior refrigerant and refrigerant bypass 140.
Compressor 110 has compression chamber and the air entry 101 and intermediate fill gas mouth 102 that are connected with compression chamber, and compression chamber can
To include low pressure chamber, middle pressure chamber and high pressure chest, wherein air entry 101 is connected with low pressure chamber, intermediate fill gas mouth 102 and middle pressure chamber phase
Even.Gas-liquid separator 120 has suction end 103 and outlet side 104, and outlet side 104 is connected with the air entry 101 of compressor 110.
One end of refrigerant main road 130 is connected with the outdoor heat exchanger 170 of air-conditioning, the other end and air-conditioning of refrigerant main road 130
Indoor heat exchanger (not shown) be connected, refrigerant main road 130 pass through Intermediate Heat Exchanger 160, indoor heat exchanger and outdoor heat exchanger
170 are connected respectively with compressor 110.
One end of refrigerant bypass 140 and the part of refrigerant main road 130 of the upstream of Intermediate Heat Exchanger 160 or the refrigerant in downstream
The part of main road 130 is connected, and the other end of refrigerant bypass 140 is connected with intermediate fill gas mouth 102, and refrigerant bypass 140 passes through centre
Heat exchanger 160 simultaneously can carry out heat exchange with refrigerant main road 130.
It should be noted that the part of the refrigerant main road 130 of the upstream of above-mentioned Intermediate Heat Exchanger 160 and the refrigerant master in downstream
The part on road 130 can change with the refrigeration of air-conditioning or heating.When air conditioner is in refrigeration mode, Intermediate Heat Exchanger
Refrigerant main road 130 of the part of the refrigerant main road 130 of 160 upstream between outdoor heat exchanger 170 and Intermediate Heat Exchanger 160
Part, the portion of the refrigerant main road 130 of the part of the refrigerant main road 130 in downstream between Intermediate Heat Exchanger 160 and indoor heat exchanger
Point；When air conditioner is heating mode, the part of the refrigerant main road 130 of the upstream of Intermediate Heat Exchanger 160 is Intermediate Heat Exchanger 160
The part of refrigerant main road 130 between indoor heat exchanger, the part of the refrigerant main road 130 in downstream for outdoor heat exchanger 170 with
The part of refrigerant main road 130 between Intermediate Heat Exchanger 160.
During refrigerant bypass 140 is a branch of refrigerant main road 130, and no matter one end of refrigerant bypass 140 is provided in
Between heat exchanger 160 upstream refrigerant main road 130 part or downstream refrigerant main road 130 part, refrigerant bypass 140 is all
To pass through Intermediate Heat Exchanger 160 to carry out heat exchange with refrigerant main road 130.
Optionally, throttling set 180 is provided on refrigerant bypass 140, throttling set 180 is arranged on refrigerant bypass 140
Between described one end and Intermediate Heat Exchanger 160.The refrigerant distributed from refrigerant main road 130 first passes around throttling set 180, warp
The reduction of the refrigerant temperature after throttling set 180 is crossed, and then in refrigerant main road 130 can be absorbed after Intermediate Heat Exchanger 160
Refrigerant heat so that refrigerant temperature in refrigerant main road 130 reduces, and improves system unit refrigerating capacity.Wherein, throttling set
180 aperture is adjustable.
And since the refrigerant in refrigerant bypass 140 will not enter the suction end 103 of compressor 110, but it is directly entered
The middle pressure chamber of compressor 110 has been arrived, has not occupied the aspirated volume of compressor 110, it is possible to significantly improve the refrigeration of system
Ability.
One end of branch flow passage 150 is connected with refrigerant bypass 140, and the suction end 103 of the other end and gas-liquid separator 120
It is connected.Cause the pressure at expulsion of compressor 110 excessively high when the refrigerant due to refrigerant bypass 140 enters compressor 110 or press
Contracting machine frequency-variable module when the temperature is excessively high, can cause at least a portion of the refrigerant in refrigerant bypass 140 to pass through branch flow passage
150 enter in gas-liquid separator 120.The condition of the opening and closing of branch flow passage 150 also will be described in detail below.
Multi-line system 100 for air-conditioning according to embodiments of the present invention, by the way that the refrigerant in refrigerant bypass 140 is led
Enter to middle pressure chamber, the aspirated volume of compressor 110 can be not take up, improve the refrigerating capacity of system.
In addition, branch flow passage 150 is set between the suction end 103 of gas-liquid separator 120 and refrigerant bypass 140, it can be with
It is excessively high or when compressor variable frequency module temperature is excessively high in the pressure at expulsion of compressor 110, by least one in refrigerant bypass 140
Refrigerant is divided to export to gas-liquid separator 120.
In some embodiments of the invention, as shown in Figure 1, branch flow passage 150 is equipped with branch flow passage 150 is controlled to open
Or the first valve body 151 closed, refrigerant bypass 140 are equipped with the second valve body 141 for being used to open or closing refrigerant bypass 140.
For example, when 110 pressure at expulsion of compressor or excessively high compressor variable frequency module temperature, the second valve body can be closed
141, the first valve body 151 is opened, the refrigerant in refrigerant bypass 140 is exported to gas-liquid separator 120, in entering
Chamber is pressed, the pressure at expulsion of compressor 110 or the temperature of compressor variable frequency module is avoided further to increase；It will be understood
Be, when compressor 110 pressure at expulsion or compressor variable frequency module when the temperature is excessively high, the first valve body 151 and the second valve body 141
It can also be completely in opening state, at least part refrigerant in such refrigerant bypass 140 can be exported to gas-liquid separator 120,
The pressure at expulsion of compressor 110 or the temperature of compressor variable frequency module is avoided further to increase.
Optionally, the first valve body 151 and the second valve body 141 are solenoid valve, and the second valve body 141 is valve body open in usual.
In some embodiments of the invention, as shown in Figure 1, being additionally provided with the first temperature sensor on refrigerant bypass 140
142 and second temperature sensor 143, the first temperature sensor 142 be arranged between Intermediate Heat Exchanger 160 and throttling set 180
Refrigerant bypass 140 on, second temperature sensor 143 is arranged on the refrigerant bypass between Intermediate Heat Exchanger 160 and compressor 110
On 140.Preferably, second temperature sensor 143 is arranged between Intermediate Heat Exchanger 160 and compressor 110 and close intermediate
On the refrigerant bypass 140 of heat exchanger 160.
First temperature sensor 142 is used to detect the temperature for the refrigerant for not flowing through Intermediate Heat Exchanger 160 in refrigerant bypass 140
Degree, second temperature sensor 143 are used to detect the temperature for the refrigerant that Intermediate Heat Exchanger 160 is flowed through in refrigerant bypass 140, further
Ground, the temperature that second temperature sensor 143 detects are Tb, and the temperature that the first temperature sensor 142 detects is Ta, wherein Δ
T=Tb-Ta when Δ T is less than the first preset temperature a and is more than the second preset temperature b, keeps the aperture of throttling set 180 not
Become；When Δ T is more than or equal to the first preset value a, the aperture of throttling set 180 is increased so that by the refrigerant of throttling set 180
The temperature of refrigerant in bypass 140 is unlikely to too low；When Δ T is less than or equal to the first preset value b, reduce throttling set 180
Aperture, to reduce the temperature of the refrigerant in the refrigerant bypass 140 by throttling set 180, wherein, a ＞ b.
In some embodiments of the invention, the multi-line system 100 for air-conditioning further includes to detect compressor 110
Pressure at expulsion pressure-detecting device 113.
The pressure at expulsion for the compressor 110 that pressure-detecting device 113 detects is Pd, is more than or equal to preset pressure in Pd
During Pds, the first valve body 151 and the second valve body 141 are in opening state, at this time at least one of the refrigerant in refrigerant bypass 140
Part is entered in gas-liquid separator 120, and the pressure at expulsion to avoid compressor 110 is excessively high；When Pd is less than Pds-C, first
Valve body 151 is closed and the second valve body 141 is opened, so that the refrigerant in refrigerant bypass 140 is all introduced into middle pressure chamber, with
Improve the specific refrigerating effect and refrigerating capacity of multi-line system 100.Wherein, C for constant and can meet：0MPa≤C≤
1.0MPa。
Specifically, branch flow passage 150 is located at Intermediate Heat Exchanger 160 and the by the first valve body 151 and refrigerant bypass 140
Pipeline connection between two valve bodies 141.That is, when the first valve body 151 is opened, at least part in refrigerant bypass 140
Refrigerant can be entered by the first valve body 151 in gas-liquid separator 120, and the first valve body 151, which can control, passes through branch flow passage
The flow of refrigerant in 150.
In some embodiments of the invention, as shown in Figure 1, further including to examine for the multi-line system 100 of air-conditioning
The three-temperature sensor 112 of measured compressed machine frequency-variable module temperature, compressor variable frequency module are arranged in electric-controlled box 190.
The temperature of compressor variable frequency module is Tc, is more than or equal to preset temperature Tcs, the first valve body 151 and the second valve in Tc
Body 141 is in opening state, and at least a portion of the refrigerant in refrigerant bypass 140 is entered in gas-liquid separator 120 at this time,
Temperature to avoid compressor variable frequency module is excessively high；When Tc is less than Tcs-d, the first valve body 151 is closed and the second valve body 141 is beaten
It opens, so that the refrigerant in refrigerant bypass 140 is all introduced into middle pressure chamber.Wherein d is constant, and d meets：0℃≤C≤20
℃。
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms is not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It is combined in an appropriate manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the different embodiments described in this specification or example and different embodiments or exemplary feature
It closes and combines.
Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (7)
1. a kind of multi-line system for air-conditioning, which is characterized in that including：
Intermediate Heat Exchanger；
Compressor, the compressor have compression chamber and the air entry and intermediate fill gas mouth that are connected with the compression chamber；
Gas-liquid separator, the gas-liquid separator have suction end and outlet side, the outlet side and the air-breathing of the compressor
Mouth is connected；
Refrigerant main road, one end of the refrigerant main road are connected with the outdoor heat exchanger of the air-conditioning, the refrigerant main road it is another
End be connected with the indoor heat exchanger of the air-conditioning, the refrigerant main road pass through the Intermediate Heat Exchanger, the indoor heat exchanger with
The outdoor heat exchanger is connected respectively with the compressor；
Refrigerant bypass, the part of the refrigerant main road of one end of the refrigerant bypass and the upstream of the Intermediate Heat Exchanger or under
The part of the refrigerant main road of trip is connected, and the other end of the refrigerant bypass is connected with the intermediate fill gas mouth, the refrigerant
Bypass can simultaneously exchange heat through the Intermediate Heat Exchanger with the refrigerant main road；
Branch flow passage, one end of the branch flow passage is connected with the refrigerant bypass and the institute of the other end and the gas-liquid separator
Suction end is stated to be connected；
Throttling set is provided on the refrigerant bypass, the throttling set is arranged on described one end and the institute of the refrigerant bypass
It states between Intermediate Heat Exchanger；
The branch flow passage is equipped with the first valve body that the branch flow passage is controlled to open or close, and the refrigerant bypass is equipped with
It is used to open or closes the second valve body of the refrigerant bypass；
The first temperature sensor and second temperature sensor are additionally provided on the refrigerant bypass, first temperature sensor is set
It puts on the refrigerant bypass between the Intermediate Heat Exchanger and throttling set, the second temperature sensor is arranged on the centre
On refrigerant bypass between heat exchanger and compressor；Wherein
The compression chamber includes low pressure chamber, middle pressure chamber and high pressure chest, and the air entry is connected with the low pressure chamber, the intermediate benefit
Gas port is connected with medium pressure chamber；
The refrigerant temperature that first temperature sensor detects be Ta, the refrigerant temperature that the second temperature sensor detects
For Tb, wherein Δ T=Tb-Ta, when Δ T is less than the first preset value a and is more than the second preset value b, the throttling set is kept
Aperture it is constant, when Δ T is more than or equal to the first preset value a, increase the aperture of the throttling set, be less than or equal to the in Δ T
During two preset value b, reduce the aperture of the throttling set, wherein a ＞ b；
The pressure at expulsion of the compressor is Pd, is more than or equal to preset pressure Pds, first valve body and described the in the Pd
Two valve bodies are in opening state, and when the Pd is less than Pds-C, first valve body is closed and second valve body is opened,
Wherein C is constant, and C meets：0MPa≤C≤1.0MPa；
The compressor variable frequency module temperature is Tc, is more than or equal to preset temperature Tcs, first valve body and described in the Tc
Second valve body is in opening state, and when the Tc is less than Tcs-d, first valve body is closed and second valve body is beaten
It opens, wherein d is constant, and d meets：0℃≤C≤20℃.
2. the multi-line system according to claim 1 for air-conditioning, which is characterized in that further include：It is described for detecting
The pressure-detecting device of the pressure at expulsion of compressor.
3. the multi-line system according to claim 1 for air-conditioning, which is characterized in that the branch flow passage passes through described
First valve body is connected with the pipeline portions between the Intermediate Heat Exchanger and second valve body of the refrigerant bypass.
4. the multi-line system according to claim 1 for air-conditioning, which is characterized in that further include to detect compressor
The three-temperature sensor of frequency-variable module temperature, the compressor variable frequency module are arranged in electric-controlled box.
5. the multi-line system according to claim 1 for air-conditioning, which is characterized in that first valve body and described
Two valve bodies are solenoid valve.
6. the multi-line system according to claim 1 for air-conditioning, which is characterized in that the second valve body is valve open in usual
Body.
7. the multi-line system according to claim 1 for air-conditioning, which is characterized in that the aperture of the throttling set connects
It is continuous adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510373707.1A CN104896813B (en) | 2015-06-29 | 2015-06-29 | For the multi-line system of air-conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510373707.1A CN104896813B (en) | 2015-06-29 | 2015-06-29 | For the multi-line system of air-conditioning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104896813A CN104896813A (en) | 2015-09-09 |
| CN104896813B true CN104896813B (en) | 2018-06-05 |
Family
ID=54029633
Family Applications (1)
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| CN114165909A (en) * | 2020-09-10 | 2022-03-11 | 广东美的暖通设备有限公司 | Air conditioning system, control method of air conditioning system, and computer-readable storage medium |
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| WO2008143611A1 (en) * | 2007-05-17 | 2008-11-27 | Carrier Corporation | Economized refrigerant system with flow control |
| WO2008150289A1 (en) * | 2007-06-04 | 2008-12-11 | Carrier Corporation | Refrigerant system with cascaded circuits and performance enhancement features |
| US7997092B2 (en) * | 2007-09-26 | 2011-08-16 | Carrier Corporation | Refrigerant vapor compression system operating at or near zero load |
| EP2286162A4 (en) * | 2007-12-20 | 2012-09-12 | Carrier Corp | Refrigerant system and method of operating the same |
| KR101552618B1 (en) * | 2009-02-25 | 2015-09-11 | 엘지전자 주식회사 | air conditioner |
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| CN104613665A (en) * | 2015-02-02 | 2015-05-13 | 珠海格力电器股份有限公司 | Heat pump air conditioner system |
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