CN105444478A - Throttling device for air conditioner - Google Patents
Throttling device for air conditioner Download PDFInfo
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- CN105444478A CN105444478A CN201510998180.1A CN201510998180A CN105444478A CN 105444478 A CN105444478 A CN 105444478A CN 201510998180 A CN201510998180 A CN 201510998180A CN 105444478 A CN105444478 A CN 105444478A
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- orifice plate
- aperture
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- air
- hole
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a throttling device for an air conditioner. The throttling device comprises a circulating pipeline and M pore plates, wherein the M pore plates are respectively arranged in the circulating pipeline so as to partition (M+1) pipe cavities; through holes for allowing the corresponding pore plates to pass through in the thickness direction are formed in all the pore plates; and M is larger than or equal to an integer of 2. According to the throttling device disclosed by the invention, M-level throttling can be realized; and due to the adoption of the serially-connected combination structure of the plurality of pore plates, the regulating capacity is high, the regulating process is relatively stable, and particularly, the regulating capacity of the throttling device under a variable working condition and a variable load condition is improved. In addition, the throttling device with a pure mechanical structure is simple in structure, low in price, low in fault rate, capable of stably operating for a long term and also simple in installation and maintenance.
Description
Technical field
The present invention relates to air-conditioning equipment field, especially relate to a kind of throttling arrangement for air-conditioning.
Background technology
The structure of the throttling arrangement routine of central air conditioner main machine has electric expansion valve, capillary, orifice plate+magnetic valve etc.The throttle style Application comparison of single orifice plate is few, and mainly because traditional throttle orifice plate apparatus adjustable range is limited, its Flow Adjusting Performance is poor, the ability of particularly variable working condition, varying duty.
Summary of the invention
The present invention aims to provide a kind of throttling arrangement for air-conditioning, and this throttling arrangement is provided with orifice plate, and Flow Adjusting Performance is better.
According to the throttling arrangement for air-conditioning of the embodiment of the present invention, comprise: circulation duct and M orifice plate, a described M orifice plate is located in described circulation duct respectively to be separated out (M+1) individual tube chamber, each described orifice plate is provided with the through hole of through corresponding orifice plate in a thickness direction, described M be more than or equal to 2 integer.
According to the throttling arrangement of the air-conditioning of the embodiment of the present invention, by arranging M orifice plate, can realize the throttling of M level, the tandem compound structure regulating power of multiple orifice plate is large, regulates relatively stable, especially improves the regulating power of throttling arrangement under variable working condition, varying duty.In addition, the throttling arrangement of pure frame for movement, structure is simple, low price, fault rate is little, and unit can steady in a long-termly run, install, safeguard also simple.
In certain embodiments, on refrigerant circulating direction, the area being positioned at the described through hole on the described orifice plate of upstream position is greater than the area of the described through hole be positioned on the described orifice plate of downstream position.Thus ensure that refrigerant can, from refrigerant inlet smooth flow to M level orifice plate, ensure to form a certain proportion of gas-liquid mixture.
Preferably, described orifice plate is two or three.
In certain embodiments, on each described orifice plate, described through hole comprises isolated multiple sub-aperture.Thus, refrigerant flowing crushing can significantly be reduced.
Particularly, described orifice plate is two, and the described multiple sub-aperture on each described orifice plate is the circular hole of equal diameters, and the diameter d of the sub-aperture on each described orifice plate meets: CQm=1/4* π * d
2* N*X* [2* ρ * (Ph-Pl) * 100000]
1/2, wherein, C, X are empirical coefficient, and Qm is the mass circulation flow of air-conditioner set, and Ph is unit high-pressure, and Pl is unit low pressure, and ρ is refrigerant density, and d is the diameter of each sub-aperture, and N is the number of sub-aperture on orifice plate.
Alternatively, the downstream on refrigerant circulating direction of each described through hole is provided with chamfering.Thus, the setting of chamfering can avoid flow area sudden change to cause the turbulent violent situation of refrigerant, and arranges chamfering to increase actual internal area, easily processes.
Particularly, on each described orifice plate, described through hole includes: the first sub-aperture, and described first sub-aperture is located at the center position of corresponding described orifice plate.
More specifically, on each described orifice plate, described through hole includes: multiple second sub-aperture, and described multiple second sub-aperture is circumferentially arranged around described first sub-aperture.
In certain embodiments, described circulation duct comprises multiple pipeline section, and by Flange joint between adjacent two described pipeline sections, each described orifice plate is located between the flange of corresponding adjacent two described pipeline sections.Thus, be convenient to install, safeguard.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the structural representation of the throttling arrangement according to the embodiment of the present invention;
Fig. 2 is the structural representation of the orifice plate according to the embodiment of the present invention.
Reference numeral:
Throttling arrangement 100,
Circulation duct 10, pipeline section 11, refrigerant inlet 12, refrigerant exit 13,
Orifice plate 20, one-level orifice plate 21, secondary orifice plate 22,
Through hole 30, sub-aperture 31, first sub-aperture 311, second sub-aperture 312,
Flange 40.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " thickness ", " axis ", " circumference " etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply indication device 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 " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.
In describing the invention, unless otherwise clearly defined and limited, term " is connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Below with reference to Fig. 1-Fig. 2, the throttling arrangement 100 for air-conditioning according to the embodiment of the present invention is described.
According to the throttling arrangement 100 for air-conditioning of the embodiment of the present invention, as depicted in figs. 1 and 2, comprise: circulation duct 10 and M orifice plate 20, M orifice plate 20 is located in circulation duct 10 respectively to be separated out (M+1) individual tube chamber, the through hole 30, M that each orifice plate 20 is provided with through corresponding orifice plate 20 be in a thickness direction be more than or equal to 2 integer.
Particularly, the two ends of circulation duct 10 are respectively refrigerant inlet 12 and refrigerant exit 13, and refrigerant flows into circulation duct 10 from refrigerant inlet 12, then flows out from refrigerant exit 13.M orifice plate 20 to be turned up the soil setting along the axially spaced-apart of circulation duct 10, and (M+1) individual tube chamber of formation is arranged in series.Through hole 30 on corresponding orifice plate 20 between adjacent two tube chambers pass through is communicated with, and refrigerant flows into another tube chamber from through hole 30 by a tube chamber, and refrigerant often flows through an orifice plate 20, and once, refrigerant pressure drop once for coolant throttle.
For convenience of describing, the orifice plate 20 of contiguous refrigerant inlet 12 is called one-level orifice plate 21, on from refrigerant inlet 12 towards the direction of refrigerant exit 13, the title of orifice plate 20 the like.Namely the orifice plate 20 after one-level orifice plate 21 is secondary orifice plate 22, and the orifice plate 20 of contiguous refrigerant exit 13 is M level orifice plate.In Fig. 1, M is 2, and therefore M level orifice plate is secondary orifice plate 22.
Refrigerant excessively cold in air-conditioning, after one-level orifice plate 21 reducing pressure by regulating flow, becomes gas-fluid two-phase mixture.Afterwards, two-phase mixture is through secondary orifice plate 22 further reducing pressure by regulating flow again, until after refrigerant flowed through M level orifice plate, the pressure of refrigerant reduces greatly, reaches the object of reducing pressure by regulating flow, and the refrigerant after step-down enters evaporimeter again.
Multistage orifice plate compared with single orifice plate, structure and the effect in practical adjustments obviously different.
Specifically, in the air-conditioning of the single orifice plate of tradition, because the throttling capacity of single orifice plate is limited, single orifice plate also needs series electrical magnet valve to combinationally use.When unit load hour, unit cold medium flux is less, and magnetic valve power-off is closed, and this orifice plate does not play throttling action.When unit load is large, unit cold medium flux is comparatively large, and solenoid valves is opened, this orifice throttle.In the moment that magnetic valve opens or cuts out, sharply, orifice throttle effect obviously declines in cold medium flux change.That is, the throttling arrangement of single orifice plate, not only increases the process of electrical cooperation, and there will be the phenomenon of sharply suddenling change in extreme operating conditions down-off, and single orifice plate in the presence of a harsh environment regulating power is poor.
And in the embodiment of the present invention, because throttling arrangement 100 comprises M orifice plate 20, the combining structure regulating power of multiple orifice plate 20 is large, breach the limitation that the throttling arrangement adjustable range of traditional single orifice plate is little.And owing to there being the buffering of multiple orifice plate 20, the classification of every one-level orifice plate 21 regulates, and throttling arrangement 100 regulates relatively stable, and this throttling arrangement 100, without the need to arranging magnetic valve, especially improves the regulating power of throttling arrangement 100 under variable working condition, varying duty.
In addition, relative to throttling arrangements such as electric expansion valves, in present patent application, the throttling arrangement 100 of this pure frame for movement, can depart from electronic devices and components completely, and structure is simple, low price.Owing to not having fault and the circuit communication fault of electronic devices and components, regulate without the need to other external signals, program, throttling arrangement 100 fault rate is little, and unit can steady in a long-term run, install, safeguard also simple.
The adjustable circular flow flux of refrigerant of the throttling arrangement 100 of the embodiment of the present invention is large, and regulating power is high, can be applicable to large-size air conditioning as in central air-conditioning, uses the throttling arrangement 100 of M orifice plate 20 tandem compound, with the obvious advantage.
According to the throttling arrangement 100 of the air-conditioning of the embodiment of the present invention, by arranging M orifice plate 20, can realize the throttling of M level, the tandem compound structure regulating power of multiple orifice plate 20 is large, regulate relatively stable, improve the regulating power of throttling arrangement 100 under variable working condition, varying duty.In addition, the throttling arrangement 100 of pure frame for movement, structure is simple, low price, fault rate is little, and unit can steady in a long-termly run, install, safeguard also simple.
In certain embodiments, on refrigerant circulating direction, the area being positioned at the through hole 30 on the orifice plate 20 of upstream position is greater than the area of the through hole 30 be positioned on the orifice plate 20 of downstream position.
That is, on M orifice plate 20, often increase one-level, on orifice plate 20, the area of through hole 30 reduces once, and on the orifice plate 20 of contiguous refrigerant inlet 12, through hole 30 area is large, and on the orifice plate 20 of contiguous refrigerant exit 13, through hole 30 area is little.
Being understandable that, for ensureing that refrigerant can from refrigerant inlet 12 smooth flow to M level orifice plate, ensureing to form a certain proportion of gas-liquid mixture, during (M-1) individual orifice plate 20 before flowing through of refrigerant, refrigerant pressure drop can not be excessive.As when M is two, the effect of one-level orifice plate 21 is auxiliary buffering refrigerants, and restriction effect can not be excessive, avoid the excessive shwoot of throttling excessive, and secondary orifice plate 22 plays main throttling action.
Therefore, from one-level orifice plate 21 to M level orifice plate, through hole 30 area on orifice plate 20 preferably successively decreases layer by layer.
Alternatively, when M is more than or equal to 3, from one-level orifice plate 21 to M level orifice plate, the area of through hole 30 by a certain percentage coefficient successively decreases.
Particularly, on refrigerant circulating direction, the horizontal area of at least part of section of each through hole 30 increases gradually.That is, on the circulating direction of refrigerant, when refrigerant flows through through hole 30, refrigerant flow section increases gradually, then flow velocity reduces gradually, and hydraulic pressure reduces gradually, thus reduces the flow turbulence of refrigerant, and then reduces crushing.
Preferably, as shown in Figure 2, the downstream on refrigerant circulating direction of each through hole 30 is provided with chamfering, that is, through hole 30 is being provided with chamfering towards one end of refrigerant exit 13, like this, when refrigerant is about to flow into next tube chamber by through hole 30, flow section increases gradually.Due to refrigerant enter tube chamber by through hole 30 time, refrigerant flow cross-section areas suddenlys change, the situation that the setting of chamfering can be avoided flow area to suddenly change causing refrigerant turbulent flow violent.And chamfering is set to increase actual internal area, easily process.
In certain embodiments, as shown in Figure 2, on each orifice plate 20, through hole 30 comprises isolated multiple sub-aperture 31.
Can find out, porous plate, compared with single orifice plate, acts on and also has obvious difference in practical adjustments.Specifically, through hole 30 being divided into multiple sub-aperture 31, avoiding refrigerant to concentrate when flowing through orifice plate 20 inflow hole to cause the turbulent violent situation of adjacent domain.Be divided into multiply circulation by refrigerant, significantly can reduce refrigerant flowing crushing.
This porous plate coordinates the structure of multistage orifice plate, can reach significant restriction effect in practical adjustments.
Particularly, as shown in Figure 2, on each orifice plate 20, through hole 30 includes: the first sub-aperture 311, first sub-aperture 311 is located at the center position of corresponding orifice plate 20.Such setting meets fluid flowing law, and can circulate refrigerant to greatest extent.
More specifically, as shown in Figure 2, on each orifice plate 20, through hole 30 includes: multiple second sub-aperture 312, and multiple second sub-aperture 312 is circumferentially arranged around the first sub-aperture 311.This set, structure is simple, and layout is easy, and the flow of each second sub-aperture 312 is comparatively even, is beneficial to circulation.
Alternatively, multiple sub-aperture 31 is circular port, and advantageously, the internal diameter size of multiple sub-aperture 31 is equal, thus convenient processing.
Certainly, in the embodiment of the present invention, through hole 30 can be not limited to be divided into multiple sub-aperture 31, and the shape of through hole 30 is not limited to circular hole, does not do concrete restriction here.
In certain embodiments, as shown in Figure 1, circulation duct 10 comprises multiple pipeline section 11, is connected between adjacent two pipeline sections 11 by flange 40, and each orifice plate 20 is located between the flange 40 of corresponding adjacent two pipeline sections 11.
Particularly, the flange 40 of adjacent two pipeline sections 11 is connected by securing member, the structure of this set flange 40, can so that install, safeguard.As in FIG, be provided with two orifice plates 20 in circulation duct 10, when circulation duct 10 is divided into three pipeline sections 11, there is blocking when circulation duct 10 or reveal, the pipeline section 11 in centre position directly can be pulled down, detection failure position or carry out is dredged, replacing etc., operation is very easy.
Preferably, orifice plate 20 is two or three, thus reaches the object of refrigerant multi-level throttle, orifice plate 20 quantity can be avoided too much to cause refrigerant handling capacity to decline simultaneously.
In a specific embodiment, orifice plate 20 is two, by the calculating of conventional orifice plate, and test data of experiment, the orifice plate empirical equation be suitable in the embodiment of the present invention can be simulated.The area S of the through hole 30 namely on each orifice plate 20 meets relational expression: C*Qm=S*X* [2* ρ * (Ph-Pl) * 100000]
1/2.
Wherein, C, X are empirical coefficient, and Qm is the mass circulation flow of air-conditioner set, and Ph is unit high-pressure, and Pl is unit low pressure, and ρ is refrigerant density.Certainly, on orifice plate 20 not at the same level, above-mentioned empirical coefficient C, X value is also different.
Calculate preferred through hole 30 area on an orifice plate 20 according to above-mentioned empirical equation, through the Combination Design of multistage orifice plate 20, preferably throttling performance can be obtained.
From above-mentioned empirical equation, the area S of the through hole 30 on each orifice plate 20 is directly proportional to the height pressure reduction (Ph-Pl) of air-conditioner set, is inversely proportional to the mass circulation flow Qm of air-conditioner set.
When through hole 30 is divided into multiple sub-aperture 31, when multiple sub-aperture 31 is isometrical circular hole, on each orifice plate 20, the diameter of sub-aperture 31 and quantity can be selected by following formula optimization: C*Qm=1/4* π * d
2* N*X* [2* ρ * (Ph-Pl) * 100000]
1/2, wherein, N is the quantity of sub-aperture 31 on orifice plate 20, and d is the diameter of single sub-aperture 31 on orifice plate 20.
Like this, the condition range size can run according to unit, the size in adjustment sub-aperture 31 quantity and aperture.In addition, the distance between multistage orifice plate 20 also can regulate according to above-mentioned formula.
Alternatively, when M is more than or equal to 3, during as used three grades of orifice plates, from one-level orifice plate 21 to three grades of orifice plates, the quantity of sub-aperture 31 and diameter index variation by a certain percentage on every one-level orifice plate, this proportionality coefficient does not do concrete restriction.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (9)
1. the throttling arrangement for air-conditioning, it is characterized in that, comprise: circulation duct and M orifice plate, a described M orifice plate is located in described circulation duct respectively to be separated out (M+1) individual tube chamber, each described orifice plate is provided with the through hole of through corresponding orifice plate in a thickness direction, described M be more than or equal to 2 integer.
2. the throttling arrangement for air-conditioning according to claim 1, is characterized in that, on refrigerant circulating direction, the area being positioned at the described through hole on the described orifice plate of upstream position is greater than the area of the described through hole be positioned on the described orifice plate of downstream position.
3. the throttling arrangement for air-conditioning according to claim 1, is characterized in that, described orifice plate is two or three.
4. the throttling arrangement for air-conditioning according to claim 1, is characterized in that, on each described orifice plate, described through hole comprises isolated multiple sub-aperture.
5. the throttling arrangement for air-conditioning according to claim 4, is characterized in that, described orifice plate is two, and the described multiple sub-aperture on each described orifice plate is the circular hole of equal diameters, and the diameter of each described sub-aperture meets relational expression:
CQm＝1/4*π*d
2*N*X*[2*ρ*(Ph-Pl)*100000]
1/2，
Wherein, C, X are empirical coefficient, and Qm is the mass circulation flow of air-conditioner set, and Ph is unit high-pressure, and Pl is unit low pressure, and ρ is refrigerant density, and d is the diameter of each sub-aperture, and N is the number of sub-aperture on orifice plate.
6. the throttling arrangement for air-conditioning according to claim 1, is characterized in that, the downstream on refrigerant circulating direction of each described through hole is provided with chamfering.
7. the throttling arrangement for air-conditioning according to claim 1, is characterized in that, on each described orifice plate, described through hole includes: the first sub-aperture, and described first sub-aperture is located at the center position of corresponding described orifice plate.
8. the throttling arrangement for air-conditioning according to claim 7, is characterized in that, on each described orifice plate, described through hole includes: multiple second sub-aperture, and described multiple second sub-aperture is circumferentially arranged around described first sub-aperture.
9. the throttling arrangement for air-conditioning according to claim 1, is characterized in that, described circulation duct comprises multiple pipeline section, and by Flange joint between adjacent two described pipeline sections, each described orifice plate is located between the flange of corresponding adjacent two described pipeline sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510998180.1A CN105444478A (en) | 2015-12-28 | 2015-12-28 | Throttling device for air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510998180.1A CN105444478A (en) | 2015-12-28 | 2015-12-28 | Throttling device for air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN105444478A true CN105444478A (en) | 2016-03-30 |
Family
ID=55554963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510998180.1A Pending CN105444478A (en) | 2015-12-28 | 2015-12-28 | Throttling device for air conditioner |
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| CN (1) | CN105444478A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108253671A (en) * | 2017-12-23 | 2018-07-06 | 中国科学院理化技术研究所 | Throttle valve |
| CN110044103A (en) * | 2018-01-15 | 2019-07-23 | 杭州赛富特设备有限公司 | A kind of falling film type shell-tube evaporator and air-conditioning system |
| CN113280204A (en) * | 2021-04-09 | 2021-08-20 | 山东电力工程咨询院有限公司 | Single-stage porous throttling orifice plate and throttling device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108253671A (en) * | 2017-12-23 | 2018-07-06 | 中国科学院理化技术研究所 | Throttle valve |
| CN110044103A (en) * | 2018-01-15 | 2019-07-23 | 杭州赛富特设备有限公司 | A kind of falling film type shell-tube evaporator and air-conditioning system |
| CN113280204A (en) * | 2021-04-09 | 2021-08-20 | 山东电力工程咨询院有限公司 | Single-stage porous throttling orifice plate and throttling device |
| CN113280204B (en) * | 2021-04-09 | 2023-09-22 | 山东电力工程咨询院有限公司 | Single-stage porous throttling orifice plate and throttling device |
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Application publication date: 20160330 |