CN105546897B - Positive displacement compressor control method, system and air-conditioning - Google Patents

Positive displacement compressor control method, system and air-conditioning Download PDF

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Publication number
CN105546897B
CN105546897B CN201610009701.0A CN201610009701A CN105546897B CN 105546897 B CN105546897 B CN 105546897B CN 201610009701 A CN201610009701 A CN 201610009701A CN 105546897 B CN105546897 B CN 105546897B
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China
Prior art keywords
control
pressure
transfiguration
positive displacement
pipeline
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CN201610009701.0A
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Chinese (zh)
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CN105546897A (en
Inventor
邹云辉
陈锐东
林金煌
罗波
吕千浩
黄志辉
程春雨
何振健
余丹
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Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN201610009701.0A priority Critical patent/CN105546897B/en
Publication of CN105546897A publication Critical patent/CN105546897A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plant or systems
    • F25B49/022Compressor control arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/13Vibrations
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/02Compressor control

Abstract

The present invention discloses a kind of positive displacement compressor control method, system and air-conditioning.The positive displacement compressor control system includes the transfiguration control piper being connected to positive displacement compressor, wherein, transfiguration control piper and the first pipeline or the second pipeline connection, to introduce the first control pressure from the first pipeline, or the second control pressure is introduced from the second pipeline, to realize the transfiguration control of positive displacement compressor, wherein, first pipeline is the pipeline for being connected to outdoor heat exchanger and four-way valve, and second pipeline is the pipeline for being connected to indoor heat exchanger and four-way valve.The present invention, which passes through, will introduce the position of high-low pressure from suction tracheae and moves on to the connecting line of four-way valve and outdoor heat exchanger, to ensure that under the premise of realizing positive displacement compressor control, pipeline vibration, stress can be effectively reduced, to extend lifetime of system, improve the security reliability of system.

Description

Positive displacement compressor control method, system and air-conditioning
Technical field
The present invention relates to compressor field, in particular to a kind of positive displacement compressor control method, system and air-conditioning.
Background technique
Cylinder body switching in positive displacement compressor control at present, switches the number of cylinder body generally by high pressure or low pressure is introduced Amount, to achieve the effect that compressor transfiguration.And introduce high-low pressure and its control mode mainly by air intake duct introduce low pressure, Exhaust pipe introduces high pressure, and the control for introducing pressure is realized in the valves control such as cooperation two-port valve, check valve, triple valve.
However, in positive displacement compressor control program, due to factors such as vibration of compressor, pipeline vibration, stress, from air-breathing When pipe, exhaust pipe adapter tube, a whole set of pipeline is hardened, the connecting tube stress, vibration are larger, there is disconnected pipe hidden danger.
Summary of the invention
In view of the above technical problem, the present invention provides a kind of positive displacement compressor control method, system and air-conditionings, are realizing Under the premise of positive displacement compressor controls, pipeline vibration, stress can be effectively reduced, extend lifetime of system, improve security reliability.
According to an aspect of the present invention, a kind of positive displacement compressor control system is provided, including is connected to positive displacement compressor Transfiguration control piper, in which:
Transfiguration control piper and the first pipeline or the second pipeline connection, to introduce the first control pressure from the first pipeline, or The second control pressure is introduced from the second pipeline, to realize the transfiguration control of positive displacement compressor, wherein first pipeline is connection The pipeline of outdoor heat exchanger and four-way valve, second pipeline are the pipeline for being connected to indoor heat exchanger and four-way valve.
In one embodiment of the invention, by the first control pressure and the second control pressure height that alternatively property introduces It presses with low pressure and realizes the transfiguration control of positive displacement compressor;Alternatively, transfiguration control piper is also connected to gas exhaust piping, by exhaust pipe For the pressure on road as high pressure, the first control pressure or the second control pressure realize the transfiguration control of positive displacement compressor as low pressure System;Alternatively, transfiguration control piper is also connected to suction line, using the pressure of suction line as low pressure, the first control pressure or Second control pressure realizes the transfiguration control of positive displacement compressor as high pressure.
In one embodiment of the invention, transfiguration control piper includes that the first transfiguration controlling brancher and the second transfiguration control Branch, in which:
First transfiguration controlling brancher and the first pipeline connection, the second transfiguration controlling brancher and the second pipeline connection.
In one embodiment of the invention, transfiguration control piper further includes the first control switch and the second control switch, Wherein:
First control switch is arranged on the first transfiguration controlling brancher, to control the on-off of the first transfiguration controlling brancher;
Second control switch is arranged on the second transfiguration controlling brancher, to control the on-off of the second transfiguration controlling brancher.
In one embodiment of the invention, under refrigeration work mode, the first control pressure is high pressure, the second control pressure Power is low pressure;In the case where heating operating mode, the first control pressure is low pressure, and the second control pressure is high pressure.
In one embodiment of the invention, positive displacement compressor is when transfiguration control piper introduces high pressure, into multi-cylinder work Operation mode;When transfiguration control piper introduces low pressure, into twin-tub operating mode.
According to another aspect of the present invention, a kind of air-conditioning is provided, including the transfiguration compression as described in above-mentioned any embodiment Machine control system.
According to another aspect of the present invention, a kind of positive displacement compressor control method is provided, comprising: transfiguration control piper is from One pipeline introduces the first control pressure to positive displacement compressor, wherein first pipeline is connection outdoor heat exchanger and four-way valve Pipeline;Transfiguration control piper introduces the second control pressure to positive displacement compressor from the second pipeline, wherein second pipeline is It is connected to the pipeline of indoor heat exchanger and four-way valve;Positive displacement compressor is pressed according to the first of introducing the control pressure and/or the second control Power realizes transfiguration control.
In one embodiment of the invention, the method also includes: by first control pressure and second control pressure make The transfiguration control of positive displacement compressor is realized for the high pressure that is selectively introducing and low pressure;Alternatively, using the pressure of gas exhaust piping as High pressure, the first control pressure or the second control pressure realize the transfiguration control of positive displacement compressor as low pressure;Alternatively, by air-breathing For the pressure of pipeline as low pressure, the first control pressure or the second control pressure realize the transfiguration control of positive displacement compressor as high pressure System.
In one embodiment of the invention, under refrigeration work mode, the first control pressure is high pressure, the second control pressure Power is low pressure;In the case where heating operating mode, the first control pressure is low pressure, and the second control pressure is high pressure.
In one embodiment of the invention, the method also includes: if transfiguration control piper by high pressure introduce transfiguration pressure Contracting machine, then positive displacement compressor enters multi-cylinder operating mode;If low pressure is introduced positive displacement compressor, transfiguration pressure by transfiguration control piper Contracting machine enters twin-tub operating mode.
The present invention, which passes through, will introduce the position of high-low pressure from suction tracheae and moves on to the connecting tube of four-way valve and outdoor heat exchanger To ensure that under the premise of realizing positive displacement compressor control pipeline vibration, stress can be effectively reduced, to extend in road Lifetime of system improves the security reliability of system.
Detailed description of the invention
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 technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art To obtain other drawings based on these drawings.
Fig. 1 is the schematic diagram of positive displacement compressor control system one embodiment of the present invention.
Fig. 2 is the schematic diagram of positive displacement compressor control method one embodiment of the present invention.
Specific embodiment
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 description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below Description only actually at least one exemplary embodiment be it is illustrative, never as to the present invention and its application or make Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments It is not limited the scope of the invention up to formula and numerical value.
Simultaneously, it should be appreciated that for ease of description, the size of various pieces shown in attached drawing is not according to reality Proportionate relationship draw.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable In the case of, the technology, method and apparatus should be considered as authorizing part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
Fig. 1 is the schematic diagram of positive displacement compressor control system one embodiment of the present invention.As shown in Figure 1, the transfiguration pressure Contracting machine control system includes the transfiguration control piper 2 being connected to positive displacement compressor 1, in which:
Transfiguration control piper 2 is connected to the first pipeline 11, and transfiguration control piper 2 is by the first pipeline 11 and positive displacement compressor 1 The first air inlet A connection.
Transfiguration control piper 2, for introducing the first control pressure Pa from the first pipeline 11, to realize positive displacement compressor 1 Transfiguration control, wherein first pipeline 11 is the pipeline for being connected to outdoor heat exchanger 4 and 3 second port F of four-way valve.
The first port E of four-way valve 3 is connected to by the gas exhaust piping 13 of compressor 1 with the exhaust outlet C of positive displacement compressor 1, The second port F of four-way valve 3 is connected to outdoor heat exchanger 4, and the third port G of four-way valve 3 passes through the suction line 14 of compressor 1 It is connected to the second air entry B of positive displacement compressor 1, the 4th port H of four-way valve 3 is connected to indoor heat exchanger 5.
Under refrigeration work mode, the first port E of four-way valve 3 is connected to second port F, the third port G of four-way valve 3 It is connected to the 4th port H, at this point, the first control pressure Pa that transfiguration control piper is introduced from the first pipeline 11 is high pressure.
In the case where heating operating mode, the first port E of four-way valve 3 is connected to the 4th port H, the second port F of four-way valve 3 It is connected to third port G, at this point, the first control pressure Pa that transfiguration control piper is introduced from the first pipeline 11 is low pressure.
In one embodiment of the invention, if high pressure is introduced the first air-breathing of positive displacement compressor 1 by transfiguration control piper 2 Mouth (that is, transfiguration control mouth) A, then positive displacement compressor 1 enters multi-cylinder operating mode.Become if transfiguration control piper 2 introduces low pressure First air entry A of positive displacement compressor 1, then positive displacement compressor 1 enters twin-tub operating mode.
In one embodiment of the invention, positive displacement compressor 1 is multicylinder compressor (three cylinders), and positive displacement compressor 1 is drawing When entering low pressure, slide plate and piston are detached from, so that a cylinder not compressed gas, becomes general mode (twin-tub mode);Introduce high pressure When, this cylinder works normally (multi-cylinder operating mode), realizes transfiguration.
In another embodiment of the invention, positive displacement compressor 1 is duplex cylinder compressor, and positive displacement compressor 1 is introducing low pressure When, slide plate and piston are detached from, so that a cylinder not compressed gas, is general mode (single cylinder mode);When introducing high pressure, this cylinder is just Transfiguration is realized in often work (twin-tub operating mode).
Suction line 14 that compressor is connect with four-way valve, gas exhaust piping 13, it is desirable to be able to use flexible design, will compress The vibration of machine outflow is consumed by pipeline, (introduces low pressure by air intake duct, exhaust pipe introduces height according to existing pipeline connecting mode The mode of pressure), suction tracheae is secured to a certain extent, is unfavorable for damping.
Based on the positive displacement compressor control system that the above embodiment of the present invention provides, by will introduce the position of high-low pressure from Suction air pipe moves on to the connecting line of four-way valve and outdoor heat exchanger, to ensure that before realizing positive displacement compressor control It puts, pipeline vibration, stress can be effectively reduced, and then extend lifetime of system, improve the security reliability of system.
In one embodiment of the invention, as shown in Figure 1, transfiguration control piper 2 can also be connected to the second pipeline 12, So that transfiguration control piper 2 introduces the transfiguration control that the second control pressure Pb realizes positive displacement compressor 1 from the second pipeline 12, In, second pipeline 12 is the pipeline for being connected to indoor heat exchanger 5 and the 4th port H of four-way valve 3, and transfiguration control piper 2 is by the Two pipelines 12 are connected to the first air inlet A of positive displacement compressor 1.
Under refrigeration work mode, the first port E of four-way valve 3 is connected to second port F, the third port G of four-way valve 3 It is connected to the 4th port H, at this point, the first control pressure Pa that transfiguration control piper is introduced from the first pipeline 11 is high pressure;Transfiguration The second control pressure Pb that control piper is introduced from the second pipeline 12 is low pressure.
In the case where heating operating mode, the first port E of four-way valve 3 is connected to the 4th port H, the second port F of four-way valve 3 It is connected to third port G, at this point, the first control pressure Pa that transfiguration control piper is introduced from the first pipeline 11 is low pressure;Transfiguration The second control pressure Pb that control piper is introduced from the second pipeline 12 is high pressure.
Through the above embodiments of the present invention, user selects different loine pressures as height according to different operating modes Pressure source is controlled, to further facilitate the control of user, the user experience is improved.
In one embodiment of the invention, as shown in Figure 1, transfiguration control piper 2 may include the first transfiguration control branch Road 21 and the second transfiguration controlling brancher 22, in which:
First transfiguration controlling brancher 21 is connected to the first pipeline 11, and the second transfiguration controlling brancher 22 and the second pipeline 12 connect It is logical.
Therefore in the above embodiment of the present invention, transfiguration control piper 2 can pass through the first transfiguration controlling brancher 21 and second Transfiguration controlling brancher 22 is connected to the first pipeline 11 and the second pipeline 12 respectively, is controlled to facilitate transfiguration control piper to first The control respectively of pressing pressure and the second control pressure.
In one embodiment of the invention, as shown in Figure 1, transfiguration control piper 2 can also include the first control switch 71 and second control switch 72, in which:
First control switch 71 is arranged on the first transfiguration controlling brancher 21, to control the logical of the first transfiguration controlling brancher 21 It is disconnected.
Second control switch 72 is arranged on the second transfiguration controlling brancher 22, to control the logical of the second transfiguration controlling brancher 22 It is disconnected.
Above-described embodiment through the invention, user can according to need the first control switch 71 of control and the second control switch 72 on-off selects the first control pressure or the second control pressure as control pressure and introduces positive displacement compressor, thus further The control of user is facilitated, the user experience is improved.
In one embodiment of the invention, first control switch 71 and the second control switch 72 can be using electricity Magnetic two-port valve controls the on-off of transfiguration controlling brancher to further facilitate user.
In one embodiment of the invention, positive displacement compressor 1 is when transfiguration control piper 2 introduces high pressure, into multi-cylinder Operating mode;When transfiguration control piper 2 introduces low pressure, into twin-tub operating mode.The above embodiment of the present invention can be with as a result, It realizes and the switching of multi-cylinder or twin-tub is realized according to the high low controlling-pressure of difference of input positive displacement compressor, to reach switching pressure The purpose of contracting machine volume.
Positive displacement compressor under refrigeration work mode and heating operating mode is discussed in detail below by a specific embodiment Control system controls the principle that compressor carries out transfiguration.
1, refrigeration work mode:
When being in refrigeration work mode, the first control pressure Pa is high pressure, and the second control pressure Pb is low pressure, according to pressure Contracting machine transfiguration principle, when:
When 1-1, the first control switch 71 are connected and the second control switch 72 disconnects, compressor introduces the first control pressure Pa is three cylinders (multi-cylinder) operating mode.
When 1-2, the first control switch 71 disconnect and the second control switch 72 is connected, compressor introduces the second control pressure Pb is two cylinders (common) operating mode.
When 1-3, the first control switch 71, the second control switch 72 disconnect, state is run before holding.
2, operating mode is heated:
When in heating operating mode, the first control pressure Pa is low pressure, and the second control pressure Pb is high pressure, according to pressure Contracting machine transfiguration principle, when
When 2-1, the first control switch 71 are connected and the second control switch 72 disconnects, compressor introduces the first control pressure Pa is two cylinders (common) operating mode.
When 2-2, the first control switch 71 disconnect and the second control switch 72 is connected, compressor introduces the second control pressure Pb is three cylinders (multi-cylinder) operating mode.
When 2-3, the first control switch 71, the second control switch 72 disconnect, state is run before holding.
The above embodiment of the present invention is changed by the way that the position for introducing high-low pressure is moved on to four-way valve from suction air pipe with outdoor The connecting line and four-way valve of hot device and the connecting line of indoor heat exchanger, by the first control pressure and the second control pressure Alternatively property introduce high pressure and low pressure come realize positive displacement compressor transfiguration control, thus ensure that realize transfiguration compression Under the premise of machine controls, pipeline vibration, stress can be effectively reduced, and then extend lifetime of system, the safety for improving system can By property.
In an alternative embodiment of the invention, the mode that high pressure is introduced from gas exhaust piping 13 can be retained, that is, transfiguration control pipe Road 2 is also connected to gas exhaust piping 13, using the pressure of gas exhaust piping 13 as high pressure, in transfiguration control piper 2 and gas exhaust piping 13 Connecting line on be arranged third control switch, with control whether introduce high pressure.
Meanwhile the first control pressure or the second control pressure are realized that the transfiguration of positive displacement compressor 1 is controlled as low pressure.
1, refrigeration work mode:
When being in refrigeration work mode, the second control pressure Pb is low pressure, by the second control pressure Pb and gas exhaust piping 13 high pressure controls the transfiguration of compressor as high-low pressure.The first control switch 71 remains disconnected under refrigeration work mode It opens, the first control pressure Pa is not involved in the transfiguration of compressor.
According to compressor transfiguration principle, when:
When 1-1, third control switch are connected and the second control switch 72 disconnects, compressor introduces the height of gas exhaust piping 13 Pressure is three cylinders (multi-cylinder) operating mode.
When 1-2, third control switch disconnect and the second control switch 72 is connected, compressor introduces the second control pressure Pb, For two cylinders (common) operating mode.
When 1-3, third control switch, the second control switch 72 disconnect, state is run before holding.
2, operating mode is heated:
When in heating operating mode, the first control pressure Pa is low pressure, by the first control pressure Pa and gas exhaust piping 13 high pressure controls the transfiguration of compressor as high-low pressure.The second control switch 72 remains disconnected under heating operating mode It opens, the second control pressure Pb is not involved in the transfiguration of compressor.
According to compressor transfiguration principle, when
When 2-1, third control switch are connected and the first control switch 71 disconnects, compressor introduces the height of gas exhaust piping 13 Pressure is three cylinders (multi-cylinder) operating mode.
When 2-2, third control switch disconnect and the first control switch 71 is connected, compressor introduces the first control pressure Pa, For two cylinders (common) operating mode.
When 2-3, the first control switch 71, third control switch disconnect, state is run before holding.
The high pressure introduced using the high pressure of gas exhaust piping 13 as compressor transfiguration control in the above embodiment of the present invention, together When using first control pressure or second control pressure realized as low pressure positive displacement compressor transfiguration control, to ensure that Under the premise of realizing positive displacement compressor control, pipeline vibration, stress can be effectively reduced, and then extend lifetime of system, improve The security reliability of system.
In still another embodiment of the process, the mode that low pressure is introduced from suction line 14 can be retained, that is, transfiguration control pipe Road 2 is also connected to suction line 14, using the pressure of suction line 14 as low pressure, in transfiguration control piper 2 and suction line 14 Connecting line on be arranged the 4th control switch, with control whether introduce high pressure.
Meanwhile first control pressure or second control pressure realized as high pressure positive displacement compressor 1 transfiguration control.
1, refrigeration work mode:
When being in refrigeration work mode, the first control pressure Pa is high pressure, by the first control pressure Pa and suction line 14 low pressure controls the transfiguration of compressor as high-low pressure.The second control switch 72 remains disconnected under refrigeration work mode It opens, the second control pressure Pb is not involved in the transfiguration of compressor.
According to compressor transfiguration principle, when:
When 1-1, the first control switch 71 are connected and the 4th control switch disconnects, compressor introduces the first control pressure Pa, For three cylinders (multi-cylinder) operating mode.
When 1-2, the first control switch 71 disconnect and the 4th control switch is connected, compressor introduces the low of suction line 14 Pressure is two cylinders (common) operating mode.
When 1-3, the first control switch 71, the 4th control switch disconnect, state is run before holding.
2, operating mode is heated:
When in heating operating mode, the second control pressure Pb is high pressure, by the second control pressure Pb and suction line 14 low pressure controls the transfiguration of compressor as high-low pressure.The first control switch 71 remains disconnected under heating operating mode It opens, the first control pressure Pa is not involved in the transfiguration of compressor.
According to compressor transfiguration principle, when
When 2-1, the second control switch 72 are connected and the 4th control switch disconnects, compressor introduces the second control pressure Pb, For three cylinders (multi-cylinder) operating mode.
When 2-2, the second control switch 72 disconnect and the 4th control switch is connected, compressor introduces the low of suction line 14 Pressure is two cylinders (common) operating mode.
When 2-3, the second control switch 72, the 4th control switch disconnect, state is run before holding.
The high pressure introduced using the low pressure of suction line 14 as compressor transfiguration control in the above embodiment of the present invention, together When using first control pressure or second control pressure realized as high pressure positive displacement compressor transfiguration control, to ensure that Under the premise of realizing positive displacement compressor control, pipeline vibration, stress can be effectively reduced, and then extend lifetime of system, improve The security reliability of system.
In the above-mentioned three kinds of embodiments of the present invention, the first embodiment, that is, press the first control pressure and the second control Power realizes the mode of positive displacement compressor transfiguration control as the high pressure and low pressure that are selectively introducing, is optimal realization of the invention Mode.
The working principle of refrigeration work mode and respective line connection relationship and control model in the above embodiment of the present invention It is also adapted to single cooler;The working principle and respective line connection relationship and control of heating operating mode in the above embodiment of the present invention Molding formula is also adapted to single heat engine, and I will not elaborate.
In one embodiment of the invention, as shown in Figure 1, the positive displacement compressor control system can also include flash distillation Device 6 and tonifying Qi pipeline 61, in which:
The flash vessel 6 is arranged on the pipeline between outdoor heat exchanger 4 and indoor heat exchanger 5.
The tonifying Qi pipeline 61 is connected to the gas supplementing opening D and flash vessel 6 of positive displacement compressor 1.
In the above embodiment of the present invention, the effect of flash vessel is to flash refrigerant wherein, to keep two phases cold Matchmaker becomes to be saturated gaseous state and saturated liquid two parts, is mended so that saturation gaseous coolant be allowed to enter compressor by tonifying Qi pipeline Gas increasing enthalpy, saturated liquid refrigerant enter evaporator by two-step throttle.
In one embodiment of the invention, as shown in Figure 1, being additionally provided with third control switch on the tonifying Qi pipeline 61 73, for controlling the on-off of tonifying Qi pipeline 61.
In one embodiment of the invention, the transfiguration control piper 2 of the positive displacement compressor control system can also wrap Include third transfiguration controlling brancher, in which: the third transfiguration controlling brancher introduces third from tonifying Qi pipeline 61 and controls pressure.It is described Third controls pressure and is between the first control pressure and the second control pressure.
In some embodiments of the invention, transfiguration control piper can choose the first control pressure and third control pressure Power, or select the second control pressure and third control pressure as high-low pressure control combination, realization to positive displacement compressor 1 the The control of one air entry A introducing pressure.Thus on the basis of realizing transfiguration control, the pressure for introducing high pressure is reduced, it can The pressure difference of the two sides such as slide plate, pin when reducing multi-cylinder work, to further increase the compressor service life.Compressor pin switching pressure Difference only needs 0.1MPa, and to reach 2.5MPa even higher by suction draught head Gao Shineng.
In one embodiment of the invention, as shown in Figure 1, in transfiguration control piper 2, in tonifying Qi pipeline 61 and air-breathing Gas-liquid separator 81,83 and 82 is respectively arranged in pipeline 14, the included gas-liquid separation of compressor in the above embodiment of the present invention Device 81,83 and 82, main function are to prevent liquid refrigerants from entering compressor, are filtered simultaneously.
In one embodiment of the invention, as shown in Figure 1, the positive displacement compressor control system can also include difference The electric expansion valve 91 and 92 of 6 front and back pipeline of flash vessel is set, for adjusting cold medium flux.
According to another aspect of the present invention, a kind of air-conditioning is provided, including the transfiguration compression as described in above-mentioned any embodiment Machine control system.
Based on the air-conditioning that the above embodiment of the present invention provides, by the way that the position for introducing high-low pressure is moved on to from suction air pipe The connecting line and four-way valve of four-way valve and outdoor heat exchanger and the connecting line of indoor heat exchanger, to ensure that in reality Under the premise of existing positive displacement compressor control, pipeline vibration, stress can be effectively reduced, and then extend lifetime of system, improve and be The security reliability of system.
Fig. 2 is the schematic diagram of positive displacement compressor control method one embodiment of the present invention.Preferably, the present embodiment can be by this Invention positive displacement compressor control system executes.As shown in Figure 2, which comprises
Step 201, transfiguration control piper 2 introduces the first control pressure Pa to positive displacement compressor 1 from the first pipeline 11, In, first pipeline 11 is the pipeline for being connected to outdoor heat exchanger 4 and four-way valve 3.
Step 202, transfiguration control piper 2 introduces the second control pressure Pb to positive displacement compressor 1 from the second pipeline 12, In, second pipeline 12 is the pipeline for being connected to indoor heat exchanger 5 and four-way valve 3.
Step 203, positive displacement compressor 1 is realized and is become according to the first of introducing the control pressure Pa and/or the second control pressure Pb Hold control.
In the first embodiment of the present invention, step 203 may include: to make the first control pressure and the second control pressure The transfiguration control of positive displacement compressor 1 is realized for the high pressure that is selectively introducing and low pressure.
In the second embodiment of the present invention, step 203 may include: using the pressure of gas exhaust piping 13 as high pressure One control pressure or the second control pressure realize the transfiguration control of positive displacement compressor 1 as low pressure.
In the third embodiment of the present invention, step 203 may include: using the pressure of suction line 14 as low pressure One control pressure or the second control pressure realize the transfiguration control of positive displacement compressor 1 as high pressure.
Based on the positive displacement compressor control method that the above embodiment of the present invention provides, by will introduce the position of high-low pressure from Suction air pipe moves on to the connecting line of four-way valve and outdoor heat exchanger and the connecting line of four-way valve and indoor heat exchanger. Specifically, the first control pressure and the second control pressure high pressure that alternatively property introduces and low pressure can be realized transfiguration The transfiguration of compressor controls;The high pressure that can also be introduced using the high pressure of gas exhaust piping 13 as compressor transfiguration control, simultaneously First control pressure or the second control pressure are realized to the transfiguration control of positive displacement compressor as low pressure;Air-breathing can also be used The low pressure of pipeline 14 as compressor transfiguration control introduce high pressure, while using first control pressure or second control pressure as High pressure come realize positive displacement compressor transfiguration control.Above scheme can guarantee in the premise for realizing positive displacement compressor control Under, pipeline vibration, stress can be effectively reduced, and then extend lifetime of system, improve the security reliability of system.
In one embodiment of the invention, the method can also include: that the first control switch 71 of control is connected and the Two control switches 72 disconnect, so that transfiguration control piper 2 introduces the first control pressure Pa to positive displacement compressor from the first pipeline 11 1;It controls the disconnection of the first control switch 71 and the second control switch 72 is connected, so that transfiguration control piper 2 draws from the second pipeline 12 Enter the second control pressure Pb to positive displacement compressor 1.
Above-described embodiment through the invention, user can according to need the first control switch 71 of control and the second control switch 72 on-off selects the first control pressure or the second control pressure as control pressure and introduces positive displacement compressor, thus further The control of user is facilitated, the user experience is improved.
In one embodiment of the invention, under refrigeration work mode, the first control pressure Pa is high pressure, the second control Pressure Pb is low pressure;In the case where heating operating mode, the first control pressure Pa is low pressure, and the second control pressure Pb is high pressure.
Through the above embodiments of the present invention, user selects different loine pressures as height according to different operating modes Pressure source is controlled, to further facilitate the control of user, the user experience is improved.
In one embodiment of the invention, if the method can also include: that transfiguration control piper 2 becomes high pressure introducing Positive displacement compressor 1, then positive displacement compressor 1 enters multi-cylinder operating mode;If low pressure is introduced positive displacement compressor 1 by transfiguration control piper 2, Then positive displacement compressor 1 enters twin-tub operating mode.The above embodiment of the present invention may be implemented according to input positive displacement compressor as a result, The high low controlling-pressures of difference realize the switching of multi-cylinders or twin-tub, to achieve the purpose that switch compressor volume.
So far, the present invention is described in detail.In order to avoid covering design of the invention, it is public that this field institute is not described The some details known.Those skilled in the art as described above, completely it can be appreciated how implementing technology disclosed herein Scheme.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
Description of the invention is given for the purpose of illustration and description, and is not exhaustively or will be of the invention It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches It states embodiment and is to more preferably illustrate the principle of the present invention and practical application, and those skilled in the art is enable to manage The solution present invention is to design various embodiments suitable for specific applications with various modifications.

Claims (12)

1. a kind of positive displacement compressor control system, which is characterized in that including the transfiguration control piper being connected to positive displacement compressor (1) (2), in which:
Transfiguration control piper (2) is connected to the first pipeline (11) or the second pipeline (12), to introduce first from the first pipeline (11) Pressure is controlled, or introduces the second control pressure from the second pipeline (12), to realize the transfiguration control of positive displacement compressor (1), to keep away Exempt to introduce control pressure from suction air pipe, reduce pipeline vibration and stress, wherein first pipeline (11) is outside communication chamber The pipeline of heat exchanger (4) and four-way valve (3), second pipeline (12) are the pipe for being connected to indoor heat exchanger (5) and four-way valve (3) Road;Wherein, the first control pressure and the second control pressure high pressure that alternatively property introduces and low pressure are realized that transfiguration is compressed The transfiguration of machine (1) controls.
2. positive displacement compressor control system as described in claim 1, which is characterized in that
Transfiguration control piper (2) is also connected to gas exhaust piping (13), using the pressure of gas exhaust piping (13) as high pressure, the first control Pressure or the second control pressure realize the transfiguration control of positive displacement compressor (1) as low pressure;
Alternatively,
Transfiguration control piper (2) is also connected to suction line (14), using the pressure of suction line (14) as low pressure, the first control Pressure or the second control pressure realize the transfiguration control of positive displacement compressor (1) as high pressure.
3. positive displacement compressor control system as claimed in claim 2, which is characterized in that transfiguration control piper (2) includes first Transfiguration controlling brancher (21) and the second transfiguration controlling brancher (22), in which:
First transfiguration controlling brancher (21) is connected to the first pipeline (11), the second transfiguration controlling brancher (22) and the second pipeline (12) Connection.
4. positive displacement compressor control system as claimed in claim 3, which is characterized in that transfiguration control piper (2) further includes One control switch (71) and the second control switch (72), in which:
First control switch (71) is arranged on the first transfiguration controlling brancher (21), to control the first transfiguration controlling brancher (21) On-off;
Second control switch (72) is arranged on the second transfiguration controlling brancher (22), to control the second transfiguration controlling brancher (22) On-off.
5. the positive displacement compressor control system as described in any one of claim 2-4,
Under refrigeration work mode, the first control pressure is high pressure, and the second control pressure is low pressure;
In the case where heating operating mode, the first control pressure is low pressure, and the second control pressure is high pressure.
6. system according to claim 5, which is characterized in that
Positive displacement compressor (1) is when transfiguration control piper (2) introduce high pressure, into multi-cylinder operating mode;In transfiguration control piper (2) when introducing low pressure, into twin-tub operating mode.
7. a kind of air-conditioning, which is characterized in that including positive displacement compressor control system such as of any of claims 1-6.
8. a kind of positive displacement compressor control method characterized by comprising
Transfiguration control piper (2) introduces the first control pressure to positive displacement compressor (1) from the first pipeline (11), wherein described the One pipeline (11) is the pipeline for being connected to outdoor heat exchanger (4) and four-way valve (3);
Transfiguration control piper (2) introduces the second control pressure to positive displacement compressor (1) from the second pipeline (12), wherein described the Two pipelines (12) are the pipeline for being connected to indoor heat exchanger (5) and four-way valve (3);
Positive displacement compressor (1) according to the first of introducing control pressure and/or second control pressure realize transfiguration control, to avoid from Suction air pipe introduces control pressure, reduces pipeline vibration and stress;
Wherein, the method also includes: by the first control pressure and the second control pressure high pressure and low that alternatively property introduces The transfiguration control for pressing to realize positive displacement compressor (1).
9. according to the method described in claim 8, it is characterized by further comprising:
Transfiguration is realized as low pressure using the pressure of gas exhaust piping (13) as high pressure, the first control pressure or the second control pressure The transfiguration of compressor (1) controls;
Alternatively,
Transfiguration is realized as high pressure using the pressure of suction line (14) as low pressure, the first control pressure or the second control pressure The transfiguration of compressor (1) controls.
10. according to the method described in claim 9, it is characterized by further comprising:
It controls the first control switch (71) to connect and the second control switch (72) disconnects, so that transfiguration control piper (2) is from first Pipeline (11) introduces the first control pressure to positive displacement compressor (1);
It controls the first control switch (71) to disconnect and the second control switch (72) is connected, so that transfiguration control piper (2) is from second Pipeline (12) introduces the second control pressure to positive displacement compressor (1).
11. method as claimed in claim 10, which is characterized in that
Under refrigeration work mode, the first control pressure is high pressure, and the second control pressure is low pressure;
In the case where heating operating mode, the first control pressure is low pressure, and the second control pressure is high pressure.
12. the method according to any one of claim 8-11, which is characterized in that further include:
If high pressure is introduced positive displacement compressor (1) by transfiguration control piper (2), positive displacement compressor (1) enters multi-cylinder operating mode;
If low pressure is introduced positive displacement compressor (1) by transfiguration control piper (2), positive displacement compressor (1) enters twin-tub operating mode.
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