CN105066493A - Air conditioning system - Google Patents

Air conditioning system Download PDF

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Publication number
CN105066493A
CN105066493A CN201510553175.XA CN201510553175A CN105066493A CN 105066493 A CN105066493 A CN 105066493A CN 201510553175 A CN201510553175 A CN 201510553175A CN 105066493 A CN105066493 A CN 105066493A
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CN
China
Prior art keywords
communicated
enthalpy
enthalpy hole
switching
hole
Prior art date
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Pending
Application number
CN201510553175.XA
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Chinese (zh)
Inventor
李冬元
黄柏英
新宅秀信
陈洪辉
梁卫恒
吴骑峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Application filed by Midea Group Co Ltd, Guangdong Midea HVAC Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201510553175.XA priority Critical patent/CN105066493A/en
Publication of CN105066493A publication Critical patent/CN105066493A/en
Pending legal-status Critical Current

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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
    • F25B31/00Compressor arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0246Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0269Details concerning the involute wraps
    • F04C18/0292Ports or channels located in the wrap
    • 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
    • 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

Abstract

The invention belongs to the technical field of air conditioners and compressors, and discloses an air conditioning system. The air conditioning system comprises a scroll compressor, a first enthalpy increasing mechanism, a second enthalpy increasing mechanism, a communication switching mechanism and a controller. A static scroll plate is provided with two enthalpy increasing holes, the pressure of the first enthalpy increasing hole is smaller than the pressure of the second enthalpy increasing hole, and an air suction port and an exhaust port of the scroll compressor are provided with sensors respectively. The first enthalpy increasing mechanism and the second enthalpy increasing mechanism are used for supplementing media into a compression cavity of the scroll compressor. The communication switching mechanism is used for switching the communication state of the two enthalpy increasing mechanisms and the two enthalpy increasing holes. The controller is used for switching the working state of the communication switching mechanism. The air conditioning system can perform pseudo second-stage scroll compression for supplying air to two air supply positions in a switching mode and also can perform pseudo third-stage scroll compression for supplying air to the two air supply positions at the same time when the compression ratio of operating conditions is a little high, and the heating or refrigerating capacity and efficiency under different compression ratio conditions can be effectively improved.

Description

A kind of air-conditioning system
Technical field
The present invention relates to air-conditioner and Compressor Technology field, particularly a kind of air-conditioning system.
Background technology
Structure is simple, volume is little, lightweight, efficiency advantages of higher because it has for screw compressor, is widely used in common refrigerated air-conditioning system.This refrigerated air-conditioning system is mainly used in the environment that environment temperature is lower, condensation temperature is higher, the pressure ratio of compressor will increase, this will cause, and compressor air suction end inspiratory volume increases, gas transmission coefficient reduces, thus cause compression mechanism shortage of heat, excessive discharge temperature, the operating efficiency of compressor can be made to reduce rapidly, and longtime running there will be the problem such as wearing and tearing, refrigeration oil inefficacy between mechanical part, greatly reduces compressor long term reliability.Present stage solves the problem and main adopts the accurate secondary screw compressor with second vapor injection function, between it is characterized in that within the compressor, compression chamber offers tonifying Qi hole, and be communicated with intermediate pressure tonifying Qi (liquid) source of system by tonifying Qi pipeline, middle pressure refrigerant gas (liquid) body in system is made to fill into the compression chamber of compressor, increase the capacity of compressor, reduce delivery temperature, thus the ability of raising compressor, efficiency and reliability.
Such as, time between the ratio 4<Pd/Ps<8 that compressor sucks the pressure P s of refrigerant and the pressure P d of discharge refrigerant, prior art can promote the efficiency of compressor to a certain extent; But because tonifying Qi (liquid) aperture position is fixed, tonifying Qi (liquid) mode is single, when low-pressure ratio Pd/Ps is less than or equal to 4, and when high pressure ratio Pd/Ps is more than or equal to the condition range operation of 8, there is the unconspicuous problem of improved efficiency in compressor.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: for the increasing enthalpy mode solving existing air-conditioning refrigeration system mesoscale eddies compressor is more single, accurate secondary can only be realized and increase enthalpy, when refrigerant pressure ratio is on the low side or higher, exists and increase enthalpy for the unconspicuous problem of screw compressor improved efficiency.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of air-conditioning system, comprise: screw compressor: the quiet whirlpool dish of described screw compressor be provided with is communicated with compression chamber first increases enthalpy hole and second and increases enthalpy hole, the pressure at described first increasing enthalpy hole place is less than the pressure at described second increasing enthalpy hole place; The air entry place of described screw compressor is provided with the first sensor for detecting pressure of inspiration(Pi), and the exhaust ports of described screw compressor is provided with the second sensor for detecting pressure at expulsion; Condenser and evaporimeter: be communicated with the exhaust outlet of described screw compressor, air entry respectively, described condenser and evaporimeter pass through pipeline connection; First Zeng Han mechanism and the second Zeng Han mechanism: increase enthalpy hole supplementary medium in the compression chamber of described screw compressor for increasing enthalpy hole and/or described second by described first; Be communicated with switching mechanism: increase enthalpy hole, second respectively with described first Zeng Han mechanism, the second Zeng Han mechanism, first and increase enthalpy hole and be communicated with, described connection switching mechanism for switching described first Zeng Han mechanism, the second Zeng Han mechanism and described first increases the connected state that enthalpy hole, second increases enthalpy hole; Controller: respectively with described first sensor, the second sensor and be communicated with switching mechanism and be electrically connected; Described controller is used for the ratio according to pressure at expulsion and pressure of inspiration(Pi), switches the duty of described connection switching mechanism.
Wherein, described first increases after enthalpy hole rotates 150-210 degree along the bearing of trend of quiet whirlpool dish-type line, can increase enthalpy hole and overlaps with described second.
Wherein, on the pipeline that described first Zeng Han mechanism and the second Zeng Han mechanism are linked in sequence between described condenser and evaporimeter, and the entrance of described first Zeng Han mechanism is communicated with described condenser, and the outlet of described second Zeng Han mechanism is communicated with described evaporimeter; Pipeline between described first Zeng Han mechanism and described second Zeng Han mechanism is provided with the second control valve; Also comprise the first branch road, one end of described first branch road is with the pipeline connection between the outlet of described first Zeng Han mechanism and described second control valve, the other end of described first branch road is with the outlet of described second Zeng Han mechanism, and described first branch road is provided with the first control valve; Described first control valve, the second control valve are electrically connected with described controller respectively.
Wherein, described first Zeng Han mechanism is the first flash vessel, and described first flash vessel increases enthalpy loop by first and is connected with described connection switching mechanism; Described second Zeng Han mechanism is the second flash vessel, and described second flash vessel increases enthalpy loop by second and is connected with described connection switching mechanism.
Wherein, the duty of described connection switching mechanism at least comprises:
State one: described first increasing enthalpy loop and described first increases enthalpy hole and is communicated with;
State two: described first increasing enthalpy loop and described second increases enthalpy hole and is communicated with;
State three: described first increases enthalpy loop and described second increases enthalpy hole and be communicated with, and described second increasing enthalpy loop and described first increases enthalpy hole is communicated with.
Wherein, set the first preset value and the second preset value, and described first preset value is less than described second preset value; When the ratio of described pressure at expulsion and pressure of inspiration(Pi) be less than the first preset value, between described first preset value and the second preset value, be greater than described second preset value time, the duty correspondence of described connection switching mechanism is adjusted to state one, state two, state three by described controlling organization.
Wherein, the molded line in the dish of described quiet whirlpool is quiet whirlpool dish-type line, and the molded line in movable orbiting scroll is movable orbiting scroll molded line; Outside and the described quiet whirlpool dish-type line of described movable orbiting scroll molded line surround the first compression chamber, and inner side and the described quiet whirlpool dish-type line of described movable orbiting scroll molded line surround the second compression chamber; Described first increase enthalpy hole, second increase enthalpy hole all can with described first compression chamber, the second compression chamber alternate communication.
Wherein, the described first bottom surface increasing vertical described quiet whirlpool, enthalpy hole dish is arranged, and is provided with the first connecting path increasing enthalpy hole with described first and be communicated with in the dish of described quiet whirlpool, and described first connecting path is communicated with switching mechanism is communicated with described; Described second bottom surface increasing vertical described quiet whirlpool, enthalpy hole dish is arranged, and is provided with the second connecting path increasing enthalpy hole with described second and be communicated with in the dish of described quiet whirlpool, and described second connecting path is communicated with switching mechanism is communicated with described;
Wherein, described first connecting path increases enthalpy hole perpendicular to described first, and described second connecting path increases enthalpy hole perpendicular to described second.
Wherein, described first increases enthalpy hole is connected with the first blowdown pipe, is communicated with switching mechanism and is communicated with after described first blowdown pipe passes described screw compressor with described; Described second increases enthalpy hole is connected with the second blowdown pipe, is communicated with switching mechanism and is communicated with after described second blowdown pipe passes described screw compressor with described.
(3) beneficial effect
Technique scheme tool has the following advantages: a kind of air-conditioning system of the present invention, increases enthalpy hole, two cover flash vessels by adopting two.And be communicated with the structures such as switching mechanism, can carry out according to the difference of operating mode the conversion increasing enthalpy tonifying Qi position.Ability or the efficiency of the screw compressor under different pressure ratio operating mode can be promoted in a big way by the conversion of tonifying Qi position or tonifying Qi simultaneously.When middle refrigerant gas is with when being communicated with near the increasing enthalpy tonifying Qi position of suction muffler, be namely communicated with switching mechanism and be in state a period of time, effectively can promote low-pressure ratio, the refrigerating capacity of running on the lower load or efficiency; When middle refrigerant gas is communicated with the increasing enthalpy tonifying Qi position away from suction muffler, be namely communicated with switching mechanism when being in state two, effectively can promote cryogenic high pressure ratio, HTHP than the heating of operating mode, refrigerating capacity and efficiency; When different flash vessel intermediate refrigerant gas is communicated with from different increasing enthalpy tonifying Qi position simultaneously, when namely connection switching mechanism is in state three, can heating or refrigerating capacity and efficiency effectively under elevating ultrahigh pressure ratio operating mode.
Accompanying drawing explanation
Fig. 1 is the structural representation of air-conditioning system of the present invention;
Fig. 2 is the structural representation of screw compressor of the present invention;
Fig. 3 be movable orbiting scroll of the present invention coil with quiet whirlpool coordinate one of schematic diagram;
Fig. 4 be movable orbiting scroll of the present invention coil with quiet whirlpool coordinate schematic diagram two;
Fig. 5 is the cross-sectional view of the present invention quiet whirlpool dish;
Fig. 6 is the accurate two-stage compression pressure-enthalpy chart of air-conditioning system of the present invention;
Fig. 7 is the accurate three stage compression pressure-enthalpy chart of air-conditioning system of the present invention.
Wherein, 1, quiet whirlpool dish; 1a, quiet whirlpool dish-type line; 1b, second increases enthalpy hole; 1c, first increases enthalpy hole; 1d, the second connecting path; 1e, the first connecting path; 2, movable orbiting scroll; 2a, movable orbiting scroll molded line; 3, compression chamber; 3a, the first compression chamber; 3b, the second compression chamber; 4, sealing ring; 5, cross slip-ring; 6, upper bracket; 7, lower carriage; 8, eccentric crankshaft; 8b, oil guiding hole; 9, Oil Guide assembly; 10, upper cover; 11, lower cover; 13, refrigeration oil; 14a, rotor; 14b, motor stator; 15, exhaust outlet; 16, air entry; 17, housing discharge chamber; 18, quiet whirlpool dish exhaust outlet; 20a, the first blowdown pipe; 20b, the second blowdown pipe; 21, switching mechanism is communicated with; 22, controlling organization; 23, condenser; 24, evaporimeter; 27, the first flash vessel; 28, the second flash vessel; 30, housing; 40, first increases enthalpy loop; 41, second increases enthalpy loop; 42, first sensor; 43, the second sensor; 44, the second control valve; 45, the first control valve; 50, screw compressor.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
In describing the invention, it should be noted that, except as otherwise noted, the implication of " multiple " is two or more; Term " on ", D score, "left", "right", " interior ", " outward ", " front end ", " rear end ", " head ", the orientation of the instruction such as " afterbody " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, also it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, visual concrete condition understands above-mentioned term concrete meaning in the present invention.
The present invention discloses a kind of air-conditioning system, comprising:
Screw compressor 50: the quiet whirlpool dish 1 of described screw compressor 50 be provided with is communicated with compression chamber 3 first increases enthalpy hole 1c and second and increases enthalpy hole 1b, the pressure at described first increasing 1c place, enthalpy hole is less than the pressure at described second increasing 1b place, enthalpy hole; But must ensure in screw compressor 50 course of work, first increases enthalpy hole 1c is not communicated with the air entry 16 of screw compressor 50, and the second increasing enthalpy hole 1b is not communicated with the exhaust outlet 15 of screw compressor 50; Air entry 16 place of described screw compressor 50 is provided with the first sensor 42 for detecting pressure of inspiration(Pi), and exhaust outlet 15 place of described screw compressor 50 is provided with the second sensor 43 for detecting pressure at expulsion;
Condenser 23 and evaporimeter 24: be communicated with the exhaust outlet 15 of described screw compressor 50, air entry 16 respectively, described condenser 23 and evaporimeter 24 pass through pipeline connection; Condenser 23, evaporimeter 24 form air-conditioning system together with screw compressor 50, and this air-conditioning system is generally used for refrigeration.
First Zeng Han mechanism and the second Zeng Han mechanism: increase enthalpy hole 1b supplementary medium in the compression chamber 3 of described screw compressor 50 for increasing enthalpy hole 1c and/or described second by described first, Liang Gezeng enthalpy mechanism arranges the conversion that can realize multiple increasing enthalpy state, different operating modes can be adapted to, make screw compressor 50 can obtain higher improved efficiency under any pressure ratio.
Be communicated with switching mechanism 21: increase enthalpy hole 1c, second respectively with described first Zeng Han mechanism, the second Zeng Han mechanism, first and increase enthalpy hole 1b and be communicated with, described connection switching mechanism 21 for switching described first Zeng Han mechanism, the second Zeng Han mechanism and described first increases the connected state that enthalpy hole 1c, second increases enthalpy hole 1b; The compression chamber 3 of screw compressor 50 can be run under difference increases enthalpy state, screw compressor 50 can be made to be in accurate three stage compression state, realize the object promoting its operating efficiency under screw compressor 50 is in low-pressure ratio or high pressure ratio state.
Controller: respectively with described first sensor 42, second sensor 43 and be communicated with switching mechanism 21 and be electrically connected; Described controller is used for the ratio according to pressure at expulsion and pressure of inspiration(Pi), switches the duty of described connection switching mechanism 21.Namely controller is different from the ratio of pressure of inspiration(Pi) according to the exhaust pressure detected, switches voluntarily and is communicated with the duty of switching mechanism 21, and screw compressor 50 operating efficiency no matter under which kind of pressure ratio state can obviously be promoted.
Preferably, described first increases after enthalpy hole 1c rotates 150-210 degree along the bearing of trend of quiet whirlpool dish-type line 1a, can increase enthalpy hole 1b and overlaps with described second.
Preferably, on the pipeline that described first Zeng Han mechanism and the second Zeng Han mechanism are linked in sequence between described condenser 23 and evaporimeter 24, and the entrance of described first Zeng Han mechanism is communicated with described condenser 23, the outlet of described second Zeng Han mechanism is communicated with described evaporimeter 24; Pipeline between described first Zeng Han mechanism and described second Zeng Han mechanism is provided with the second control valve 44;
Also comprise the first branch road, one end of described first branch road is with the pipeline connection between the outlet of described first Zeng Han mechanism and described second control valve 44, the other end of described first branch road is with the outlet of described second Zeng Han mechanism, and described first branch road is provided with the first control valve 45; Described first control valve 45, second control valve 44 is electrically connected with described controller respectively.
By adjusting the open and close state of the first control valve 45, second control valve 44, unwanted flash vessel can be cut off, not participating in kind of refrigeration cycle, improve refrigeration; When namely closing the second control valve 44, the second Zeng Han mechanism is cut off, and no longer participates in circulation, and the refrigerant that condenser 23 flows out is by directly entering in evaporimeter 24 by the first branch road after the first Zeng Han mechanism.
Concrete, as shown in Figure 1, described first Zeng Han mechanism is the first flash vessel 27, and described first flash vessel 27 increases enthalpy loop 40 by first and is connected with described connection switching mechanism 21; Described second Zeng Han mechanism is the second flash vessel 28, and described second flash vessel 28 increases enthalpy loop 41 by second and is connected with described connection switching mechanism 21.During flash vessel work, in the compression chamber 3 of screw compressor 50, supplement middle piezodielectric, to improve the operating efficiency of screw compressor 50 by increasing enthalpy loop accordingly.
Preferably, the duty of described connection switching mechanism 21 at least comprises:
State one: described first increasing enthalpy loop 40 and described first increases enthalpy hole 1c and is communicated with; Now the second control valve 44 is closed, and only has the first flash vessel 27 to participate in circulation, supplements medium and enters compression chamber 3 by the first increasing enthalpy hole 1c, carry out the operation of increasing enthalpy, realize accurate two-stage compression to the area of low pressure in compression chamber 3.
State two: described first increasing enthalpy loop 40 and described second increases enthalpy hole 1b and is communicated with; Now the second control valve 44 is closed, and only has the first flash vessel 27 to participate in circulation, supplements medium and enters compression chamber 3 by the second increasing enthalpy hole 1b, carry out the operation of increasing enthalpy, realize accurate two-stage compression to the high-pressure area in compression chamber 3.
State three: described first increases enthalpy loop 40 and described second increases enthalpy hole 1b and be communicated with, and described second increasing enthalpy loop 41 and described first increases enthalpy hole 1c is communicated with.Now the first control valve 45.Second control valve 44 is all in opening, and the first flash vessel 27 and the second flash vessel 28 participate in circulation simultaneously, and are passed into respectively in compression chamber 3 by middle piezodielectric, realizes the synchronous increasing enthalpy operation two being increased to enthalpy hole, realizes accurate three stage compression.
During operation, need in controller, preset the first preset value and the second preset value, and described first preset value is less than described second preset value; When the ratio of described pressure at expulsion and pressure of inspiration(Pi) be less than the first preset value, between described first preset value and the second preset value, be greater than described second preset value time, the duty correspondence of described connection switching mechanism 21 is adjusted to state one, state two, state three by described controlling organization 22.
The determination of the first preset value and the second preset value can be determined according to different working environments, to improve the efficiency of screw compressor 50 under different operating mode as much as possible.
As shown in Figure 3, the molded line first defined in described quiet whirlpool dish 1 is quiet whirlpool dish-type line 1a, and the molded line in movable orbiting scroll 2 is movable orbiting scroll molded line 2a; Outside and the described quiet whirlpool dish-type line 1a of described movable orbiting scroll molded line 2a surround the first compression chamber 3a, and inner side and the described quiet whirlpool dish-type line 1a of described movable orbiting scroll molded line 2a surround the second compression chamber 3b; Increase below the position demand fulfillment of offering in enthalpy hole to require: described first increase enthalpy hole 1c, second increase enthalpy hole 1b all can with described first compression chamber 3a, the second compression chamber 3b alternate communication, realize the object evenly increasing enthalpy.
Preferably, as illustrated in figures 4-5, described first bottom surface increasing enthalpy hole 1c vertical described quiet whirlpool dish 1 is arranged, and is provided with the first connecting path 1e increasing enthalpy hole 1c with described first and be communicated with in described quiet whirlpool dish 1, and described first connecting path 1e is communicated with switching mechanism 21 is communicated with described; Described second bottom surface increasing enthalpy hole 1b vertical described quiet whirlpool dish 1 is arranged, and is provided with the second connecting path 1d increasing enthalpy hole 1b with described second and be communicated with in described quiet whirlpool dish 1, and described second connecting path 1d is communicated with switching mechanism 21 is communicated with described; Described first connecting path 1e increases enthalpy hole 1c, described second connecting path 1d perpendicular to described first and increases enthalpy hole 1b perpendicular to described second.Be about to increase enthalpy path draw from the side of quiet whirlpool dish 1, then be communicated with switching mechanism 21 and be communicated with.
Preferably, as shown in Figure 2, described first increases enthalpy hole 1c is connected with the first blowdown pipe 20a, and described first blowdown pipe 20a to pass after described screw compressor 50 and is describedly communicated with switching mechanism 21 and is communicated with; Described second increases enthalpy hole 1b is connected with the second blowdown pipe 20b, and described second blowdown pipe 20b to pass after described screw compressor 50 and is describedly communicated with switching mechanism 21 and is communicated with.Increase enthalpy path directly to draw from the back side of quiet whirlpool dish 1, then be communicated with switching mechanism 21 and be communicated with.
Screw compressor 50 of the present invention also comprises: housing 30, the upper cover 10 being connected to housing 30 two ends, lower cover 11, lower cover 11 inner chamber fills refrigeration oil 13, housing 30 bottom is provided with lower carriage 7, it is provided with Oil Guide assembly 9, refrigeration oil 13 is delivered to movable orbiting scroll 2 place by oil guiding hole 8b by Oil Guide assembly 9; Housing 30 top is provided with the upper bracket 6 for installing quiet whirlpool dish 1, movable orbiting scroll 2 is connected with rotor 14a by eccentric crankshaft 8, motor stator 14b is arranged on housing 30, making movable orbiting scroll 2 can only produce translation by relatively quiet whirlpool dish 1, realizing compressed gas by arranging cross slip-ring 5; Movable orbiting scroll 2 place is provided with sealing ring 4, ensures the sealing of compression chamber 3; Air entry 16 is communicated with compression chamber 3, and quiet whirlpool dish exhaust outlet 18 is communicated with housing 30 inner chamber, i.e. housing 30 discharge chamber 17, and exhaust outlet 15 is communicated with this housing 30 discharge chamber 17;
Below for the first preset value be the 4.5, second preset value for 10, the operation principle of air-conditioning system of the present invention is set forth:
Refrigerant enters the first compression chamber 3a and the second compression chamber 3b by air entry 16, then along with the translation action of movable orbiting scroll 2, two compression chambers 3 are realized supercharging by compression gradually and increase enthalpy, discharged via quiet whirlpool dish exhaust outlet 18 and exhaust outlet 15 by the refrigerant after compressing, entering condenser 23, first evaporimeter 24 and/or the second evaporimeter 24, realizing circulation finally by again entering air entry 16 after evaporimeter 24; In cyclic process, the refrigerant that part is in middle pressure condition flows back to compression chamber 3 again through the first increasing enthalpy loop 40 or the second increasing enthalpy loop 41, realizes the object increasing enthalpy.In screw compressor 50 running, first sensor 42 and the second sensor 43 detect the actual value of exhaust pressure and pressure of inspiration(Pi) in real time, and are compared by both ratio Pd/Ps and two preset values, and Pd herein represents exhaust pressure, and Ps represents pressure of inspiration(Pi):
(1) if Pd/Ps<4.5, illustrate that screw compressor 50 is in low-pressure ratio state, now close the second control valve 44, open the first control valve 45, and be communicated with the duty of switching mechanism 21 to state one by controller adjustment, namely the first flash vessel 27 increases enthalpy loop 40 and first by first and increases enthalpy hole 1c and be communicated with, and carries out the supplementary of middle pressure refrigerant, raising exhaust pressure to the area of low pressure of compression chamber 3; Now screw compressor 50 is in accurate two-stage compression state as shown in Figure 6, pressure of inspiration(Pi) is that the cold-producing medium of Ps is mixed by the intermediate refrigerant that compression and second vapor injection pressure are pm1, mixed cold-producing medium continues to be compressed to pressure at expulsion Pd, then discharge compressor and enter air conditioner circulating system, screw compressor 50 improved efficiency is obvious;
(2) if 4.5<Pd/Ps<10, then close the second control valve 44, open the first control valve 45, and be communicated with the duty of switching mechanism 21 to state two by controller adjustment, namely the first flash vessel 27 increases enthalpy loop 40 and second by first and increases enthalpy hole 1b and be communicated with, supplementing of middle pressure refrigerant is carried out to the high-pressure area of compression chamber 3, improves the enthalpy of refrigerant; Now screw compressor 50 is still in accurate two-stage compression state as shown in Figure 6, pressure of inspiration(Pi) is that the cold-producing medium of Ps is mixed by the intermediate refrigerant that compression and second vapor injection pressure are pm1, mixed cold-producing medium continues to be compressed to pressure at expulsion Pd, then discharge compressor and enter air conditioner circulating system, screw compressor 50 improved efficiency is obvious;
(3) if Pd/Ps>10, illustrate that screw compressor 50 is in high pressure ratio state, exhaust pressure is higher; Now to open the first control valve 45 and the second control valve 44 simultaneously, and be communicated with the duty of switching mechanism 21 to state three by controller adjustment, namely the first flash vessel 27 increases enthalpy loop 40 and second by first and increases enthalpy hole 1b and be communicated with, second flash vessel 28 increases enthalpy loop 41 and first by second and increases enthalpy hole 1c and be communicated with, and carries out the supplementary of middle pressure refrigerant to the area of low pressure of compression chamber 3 and high-pressure area simultaneously; Now screw compressor 50 is in accurate three stage compression state as shown in Figure 7, pressure of inspiration(Pi) is that the cold-producing medium of Ps is mixed by the refrigerating capacity that compression and second vapor injection pressure are Pm1, after mixing, refrigerant gas carries out two-stage compression, be that the refrigerant mixed of Pm2 carries out three stage compression to pressure at expulsion Pd with second vapor injection pressure after overcompression, then discharge compressor and enter air conditioner circulating system, screw compressor 50 improved efficiency is obvious.
As can be seen from the above embodiments, the present invention increases enthalpy hole, two cover flash vessels by employing two.And be communicated with the structures such as switching mechanism 21, can carry out according to the difference of operating mode the conversion increasing enthalpy tonifying Qi position.Ability or the efficiency of the screw compressor 50 under different pressure ratio operating mode can be promoted in a big way by the conversion of tonifying Qi position or tonifying Qi simultaneously.When middle refrigerant gas is with when being communicated with near the increasing enthalpy tonifying Qi position of suction muffler, be namely communicated with switching mechanism 21 and be in state a period of time, effectively can promote low-pressure ratio, the refrigerating capacity of running on the lower load or efficiency; When middle refrigerant gas is communicated with the increasing enthalpy tonifying Qi position away from suction muffler, be namely communicated with switching mechanism 21 when being in state two, effectively can promote cryogenic high pressure ratio, HTHP than the heating of operating mode, refrigerating capacity and efficiency; When different flash vessel intermediate refrigerant gas is communicated with from different increasing enthalpy tonifying Qi position simultaneously, when namely connection switching mechanism 21 is in state three, can heating or refrigerating capacity and efficiency effectively under elevating ultrahigh pressure ratio operating mode.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.

Claims (10)

1. an air-conditioning system, is characterized in that, comprising:
Screw compressor (50): quiet whirlpool dish (1) of described screw compressor (50) be provided be communicated with compression chamber (3) first increases enthalpy hole (1c) and second and increases enthalpy hole (1b), the pressure at described first increasing enthalpy hole (1c) place is less than the pressure at described second increasing enthalpy hole (1b) place; Air entry (16) place of described screw compressor (50) is provided with the first sensor (42) for detecting pressure of inspiration(Pi), and exhaust outlet (15) place of described screw compressor (50) is provided with the second sensor (43) for detecting pressure at expulsion;
Condenser (23) and evaporimeter (24): be communicated with the exhaust outlet (15) of described screw compressor (50), air entry (16) respectively, described condenser (23) and evaporimeter (24) pass through pipeline connection;
First Zeng Han mechanism and the second Zeng Han mechanism: increase enthalpy hole (1b) supplementary medium in the compression chamber (3) of described screw compressor (50) for increasing enthalpy hole (1c) and/or described second by described first;
Be communicated with switching mechanism (21): increase enthalpy hole (1c), second respectively with described first Zeng Han mechanism, the second Zeng Han mechanism, first and increase enthalpy hole (1b) and be communicated with, described connection switching mechanism (21) for switching described first Zeng Han mechanism, the second Zeng Han mechanism and described first increases the connected state that enthalpy hole (1c), second increases enthalpy hole (1b);
Controller: respectively with described first sensor (42), the second sensor (43) and be communicated with switching mechanism (21) and be electrically connected; Described controller is used for the ratio according to pressure at expulsion and pressure of inspiration(Pi), switches the duty of described connection switching mechanism (21).
2. air-conditioning system as claimed in claim 1, is characterized in that, described first increases after enthalpy hole (1c) rotates 150-210 degree along the bearing of trend of quiet whirlpool dish-type line (1a), can increase enthalpy hole (1b) and overlaps with described second.
3. air-conditioning system as claimed in claim 1, it is characterized in that, on the pipeline that described first Zeng Han mechanism and the second Zeng Han mechanism are linked in sequence between described condenser (23) and evaporimeter (24), and the entrance of described first Zeng Han mechanism is communicated with described condenser (23), the outlet of described second Zeng Han mechanism is communicated with described evaporimeter (24); Pipeline between described first Zeng Han mechanism and described second Zeng Han mechanism is provided with the second control valve (44);
Also comprise the first branch road, one end of described first branch road is with the pipeline connection between the outlet of described first Zeng Han mechanism and described second control valve (44), the other end of described first branch road is with the outlet of described second Zeng Han mechanism, and described first branch road is provided with the first control valve (45);
Described first control valve (45), the second control valve (44) are electrically connected with described controller respectively.
4. air-conditioning system as claimed in claim 3, it is characterized in that, described first Zeng Han mechanism is the first flash vessel (27), and described first flash vessel (27) increases enthalpy loop (40) by first and is connected with described connection switching mechanism (21);
Described second Zeng Han mechanism is the second flash vessel (28), and described second flash vessel (28) increases enthalpy loop (41) by second and is connected with described connection switching mechanism (21).
5. air-conditioning system as claimed in claim 4, it is characterized in that, the duty of described connection switching mechanism (21) at least comprises:
State one: described first increasing enthalpy loop (40) and described first increases enthalpy hole (1c) and is communicated with;
State two: described first increasing enthalpy loop (40) and described second increases enthalpy hole (1b) and is communicated with;
State three: described first increases enthalpy loop (40) increases enthalpy hole (1b) be communicated with described second, and described second increasing enthalpy loop (41) and described first increases enthalpy hole (1c) is communicated with.
6. air-conditioning system as claimed in claim 5, it is characterized in that, set the first preset value and the second preset value, and described first preset value is less than described second preset value;
When the ratio of described pressure at expulsion and pressure of inspiration(Pi) be less than the first preset value, between described first preset value and the second preset value, be greater than described second preset value time, the duty correspondence of described connection switching mechanism (21) is adjusted to state one, state two, state three by described controlling organization (22).
7. air-conditioning system as claimed in claim 1, is characterized in that, the molded line in described quiet whirlpool dish (1) is quiet whirlpool dish-type line (1a), and the molded line in movable orbiting scroll (2) is movable orbiting scroll molded line (2a); Outside and described quiet whirlpool dish-type line (1a) of described movable orbiting scroll molded line (2a) surround the first compression chamber (3a), and inner side and described quiet whirlpool dish-type line (1a) of described movable orbiting scroll molded line (2a) surround the second compression chamber (3b);
Described first increase enthalpy hole (1c), second increase enthalpy hole (1b) all can with described first compression chamber (3a), the second compression chamber (3b) alternate communication.
8. air-conditioning system as claimed in claim 1, it is characterized in that, described first bottom surface increasing vertical described quiet whirlpool dish (1) in enthalpy hole (1c) is arranged, be provided with the first connecting path (1e) increasing enthalpy hole (1c) with described first and be communicated with in described quiet whirlpool dish (1), described first connecting path (1e) is communicated with switching mechanism (21) is communicated with described;
Described second bottom surface increasing vertical described quiet whirlpool dish (1) in enthalpy hole (1b) is arranged, be provided with the second connecting path (1d) increasing enthalpy hole (1b) with described second and be communicated with in described quiet whirlpool dish (1), described second connecting path (1d) is communicated with switching mechanism (21) is communicated with described.
9. air-conditioning system as claimed in claim 8, it is characterized in that, described first connecting path (1e) increases enthalpy hole (1c) perpendicular to described first, and described second connecting path (1d) increases enthalpy hole (1b) perpendicular to described second.
10. air-conditioning system as claimed in claim 1, it is characterized in that, described first increases enthalpy hole (1c) is connected with the first blowdown pipe (20a), and described first blowdown pipe (20a) passes described screw compressor (50) and is communicated with switching mechanism (21) is communicated with described afterwards;
Described second increases enthalpy hole (1b) is connected with the second blowdown pipe (20b), and described second blowdown pipe (20b) passes described screw compressor (50) and is communicated with switching mechanism (21) is communicated with described afterwards.
CN201510553175.XA 2015-08-31 2015-08-31 Air conditioning system Pending CN105066493A (en)

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CN105444476A (en) * 2015-12-29 2016-03-30 珠海格力电器股份有限公司 Heat exchange system
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Application publication date: 20151118