CN102313410A - Throttling valve - Google Patents
Throttling valve Download PDFInfo
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- CN102313410A CN102313410A CN201110255190A CN201110255190A CN102313410A CN 102313410 A CN102313410 A CN 102313410A CN 201110255190 A CN201110255190 A CN 201110255190A CN 201110255190 A CN201110255190 A CN 201110255190A CN 102313410 A CN102313410 A CN 102313410A
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- elastic component
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Abstract
The invention provides a throttling valve, which comprises a valve pipe. A valve core is arranged in the valve pipe in a sliding way; a stopping part is arranged near an inlet of the valve pipe; a valve seat is fixedly inlaid on the inner wall of the valve pipe near an outlet of the valve pipe; a through hole is arranged in the center of the valve seat; the side surface of the valve core and the inner wall of the valve pipe form a passage through which a refrigerant passes; a throttling passage penetrates into the center of the valve core; a sealing part used for being jointed with the top surface of the valve seat around the through hole is fixedly arranged on the bottom surface of the valve core; an elastic component is pressed and arranged between the valve core and the valve seat; and the valve core overcomes the elastic component under the pressure action of the refrigerant, slides towards the valve seat, and further leans the sealing part against the top surface of the valve seat. The throttling valve provided by the invention replaces the parallel structure of an electromagnetic valve and a throttling element in the prior art; further, the structure is simple; the volume is small; the spatial occupancy factor of a refrigerating system is reduced; materials are also saved; and the cost is saved.
Description
Technical field
The present invention relates to the valve arrangement technology, relate in particular to a kind of choke valve.
Background technology
The compound refrigeration system of heat pipe/both vapor compression presents two states when work; A kind of is the nature refrigerating state; Promptly when outdoor temperature was lower than indoor temperature, compressor was not worked in the compound refrigeration system, the very little cold-producing medium of pressure directly by condenser via liquid branch road inflow evaporator; Another kind is the compression refrigeration state; Promptly when outdoor temperature is lower than indoor temperature; Compressor start in the compound refrigeration system, refrigerant pressure become greatly simultaneously, and high-pressure refrigerant is come out to need through inflow evaporator behind the restricting element by condenser; To form pressure differential at the restricting element two ends, reach refrigeration.
Fig. 1 is the structural representation of throttling arrangement of the prior art.In the prior art, as shown in Figure 1, be to satisfy above-mentioned two kinds of refrigerating states through between condenser and evaporimeter, inserting the throttling arrangement that composes in parallel by restricting element 11 and magnetic valve 12; When natural refrigerating state, when promptly compressor stopped, magnetic valve 12 was opened, and the very little cold-producing medium of pressure can be circulated smoothly; When the compression refrigeration state, when reaching compressor starts work, magnetic valve 12 cuts out, and the cold-producing medium of high pressure then need could circulate through restricting element 11, thereby has realized the compression refrigeration effect.
But this throttling arrangement of the prior art needs two element parallel connections, has caused volume big, and it is also bigger to take up room, and uses two elements and connecting line simultaneously, and materials are more, make that the cost of this throttling arrangement is also higher.
Summary of the invention
The present invention provides a kind of choke valve; When beginning, bring into play throttling action automatically in order to solve the defective of using magnetic valve and restricting element in the prior art simultaneously, to be implemented in compression refrigeration; And structural volume is little, simple in structure, has saved material and has also reduced the space hold rate.
The present invention provides a kind of choke valve; Comprise: the valve pipe of a column; Be slidingly equipped with a spool in the said valve pipe; Be provided with the stopper section that is used for the said spool of backstop in the porch near said valve pipe, be set with a valve seat near said valve pipe exit and on said valve inside pipe wall, said centre is provided with through hole; The inwall of the side of said spool and said valve pipe is formed for the passage that cold-producing medium passes through; Said spool or valve seat are provided with and are used for the throttling passage that cold-producing medium passes through; The bottom surface of said spool is provided with the tight sealing that contacts of valve seat end face that is used for around the said through hole; Said spool and said valve base chamber are pressed and are provided with elastic component, and said spool overcomes said elastic component and slides to said valve seat under the pressure effect of said cold-producing medium, and said sealing is resisted against on the end face of said valve seat.
Aforesaid choke valve; Wherein, the bottom center of said spool has first columnar projections, and said sealing is to be around in said first columnar projections annular boss on every side; Said elastic component is the compression spring; The top of said elastic component is set on the side of said first columnar projections, and the end face central dip of said valve seat is formed for locating the locating slot of said elastic component, and the bottom of said locating slot is connected with said through hole.
Aforesaid choke valve, wherein, the cross section of said annular boss is an inclined wedge-shaped, is provided with seal washer at corresponding said sealing around the said locating slot and on the end face at said valve seat.
Aforesaid choke valve; Wherein, said sealing is the cylinder that is fixedly installed on the bottom surface of said spool, and said throttling passage runs through said spool and sealing; Said elastic component is the compression spring, and the top of said elastic component is set in the lateral surface of said sealing.
Aforesaid choke valve, wherein, the corresponding said sealing of the end face of said valve seat raises up and is formed for the sealing platform that engages with said sealing, and the bottom of said elastic component is set in the side of said sealing platform; Said through hole runs through said valve seat and said sealing platform.
Aforesaid choke valve; Wherein, The side of said sealing bottom is the taper surface that cooperates with said through hole; Said spool overcomes said elastic component together with said sealing and slides to said valve seat under the pressure effect of said cold-producing medium, and the said taper surface of said sealing is resisted against said sealing platform.
Aforesaid choke valve, wherein, the side of said spool offers the groove that the said cold-producing medium of a plurality of confessions passes through, and the end face of said spool offers counterbore, and said counterbore is connected with said groove.
Aforesaid choke valve, wherein, said throttling passage is the multistage hole.
Aforesaid choke valve; Wherein, Comprise the first cylindrical hole section, wedged hole section and the second cylindrical hole section successively along entering the mouth to Way out; The said first cylindrical hole section equates that with the cross-sectional area of the port of said wedged hole section the said second cylindrical hole section equates with the cross-sectional area of the lower port of said wedged hole section.
Aforesaid choke valve, wherein, said stop portion and said valve pipe are structure as a whole.
Aforesaid choke valve, wherein, said valve seat and said valve pipe are structure as a whole.
Aforesaid choke valve, wherein, the throttling passage on said spool or the seal receptacle is the lip-deep throttling channel that is opened in said spool or valve seat.
Choke valve provided by the invention; Can be in the moment that the compression refrigeration state begins, under the pressure effect of cold-producing medium, get into the throttling duty, thereby make element of this choke valve replace the parallel-connection structure of magnetic valve and restricting element in the prior art; And simple in structure, volume is little; Significantly reduce the space hold rate of refrigeration system, also saved material, practiced thrift cost.
Description of drawings
Fig. 1 is the structural representation of throttling arrangement of the prior art.
Fig. 2 is the structure chart of choke valve one embodiment of the present invention.
Fig. 3 is the structure chart of another embodiment of choke valve of the present invention.
Fig. 4 is the front view of spool among Fig. 2.
Fig. 5 is the vertical view of Fig. 4.
Fig. 6 is the vertical view of spool among Fig. 3.
Fig. 7 be among Fig. 6 A-A to cutaway view.
Reference numeral:
The 11-restricting element; The 12-magnetic valve; 20-valve pipe;
21-liquid branch road; The 22-spool; The 23-valve seat;
The 24-through hole; The 25-sealing; The 26-elastic component;
The 201-stopper section; The 202-inlet; The 203-outlet;
The 221-throttling passage; 223-first columnar projections; The 231-locating slot;
The 232-seal washer; The 225-taper surface; 233-seals platform;
The 226-counterbore; The 3-passage; The 71-first cylindrical hole section;
72-wedged hole section; The 73-second cylindrical hole section.
The specific embodiment
Further specify the technical scheme of the embodiment of the invention below in conjunction with accompanying drawing and specific embodiment.
Fig. 2 is the structure chart of choke valve one embodiment of the present invention.Please with reference to Fig. 2 and Fig. 4; The choke valve that present embodiment provides; Comprise: the valve pipe 20 of a column, be slidingly equipped with a spool 22 in the valve pipe 20, be provided with the stopper section 201 that is used for backstop spool 22 at inlet 202 places near valve pipe 20; Exporting 203 places and on valve pipe 20 inwalls, be set with a valve seat 23 near valve pipe 20, valve seat 23 centers are provided with through hole 24; The inwall of the side of spool 22 and valve pipe 20 is formed for the passage 3 that cold-producing medium passes through; Spool 22 or valve seat 23 are provided with and are used for the throttling passage 221 that cold-producing medium passes through; The bottom surface of spool 22 is provided with the tight sealing 25 that contacts of valve seat 23 end faces that is used for around the said through hole 24; 23 pressures of spool 22 and valve seat are provided with elastic component 26, and spool 22 overcomes elastic component 26 and slides to valve seat 23 under the pressure effect of cold-producing medium, and sealing 25 is resisted against on the end face of valve seat 23.
Particularly; Valve pipe 20 can be cylindrical tube or polygon prism pipe; The side of spool 22 contacts with the inwall of valve pipe 20 so that spool 22 can slide along the inwall of valve pipe 20, and wherein, stopper section 201 can be structure as a whole with valve pipe 20; Certainly stopper section 201 also can process respectively with valve pipe 20, and fixedly installs together through fixed connection modes such as welding; Simultaneously, according to the shape of the inwall of valve pipe 20 shape of the side of spool 22 is set, for example; When the inwall of valve pipe 20 is the face of cylinder, multi-prismatic surface is arranged in the side of spool 22, or; For example in an embodiment of the present invention; Groove that a plurality of confession cold-producing mediums pass through can be offered in the side of spool 22 vertically as passage 3, simultaneously, also counterbore 226 can be offered at the end face of spool 22; And can be arranged on transversal shape, size and the number of passage 3 according to the required occurrence that is formed on spool 22 both sides pressure differentials when the compressor start; Counterbore 226 can make cold-producing medium flow into throttling passage 221 more fast; And the size of the throttling passage on the spool 22 221 can specifically be set according to the restriction effect that need reach, but will be much smaller than the sectional area sum of above-mentioned passage 3.Sealing 25 can be structure as a whole with spool 22; And sealing 25 matches with the end face of valve seat 23; With when sealing 25 abuts to the end face of valve seat 23, sealing 25 closely contacts no gap with the end face of valve seat 23, specifically can the plane all be arranged in the bottom surface of sealing 25 and the end face of valve seat 23; Also can the convex cambered surface be arranged in the bottom surface of sealing 25, simultaneously the end face of valve seat 23 be arranged to concavity cambered surface or plane with this cambered surface opposite face.
Choke valve in the present embodiment can replace throttling arrangement of the prior art to be installed in the liquid branch road 21 of compound refrigeration system.When refrigeration system was in the nature refrigerating state, compressor was not worked, and cold-producing medium gets into these choke valves via inlet 202, flow to the another side of spool 22 by the side and the passage 3 of the inner diameter of valve seat 23 of spool 22, again via 24 outflows of the through hole on the valve seat 23; When refrigeration system began to get into the compression refrigeration state, compressor was opened, when the cold-producing medium of high pressure flow to spool 22 via the inlet 202 of choke valve; Because high-pressure refrigerant needs could arrive via passage 3 another side of spool 22, therefore, form a pressure differential of pointing to outlet 203 directions along inlet 202 on the both sides of spool 22 in this instantaneous meeting; And guarantee the damping force of this pressure differential greater than elastic component 26 through design; Like this, this pressure differential will promote spool 22 and slide towards valve seat 23, and finally makes sealing 25 abut to the end face of valve seat 23; Because of the bottom of sealing 25 can closely contact with the end face of valve seat 23; So cold-producing medium can only flow through through the throttling passage on the spool 22 221, final cold-producing medium flows out with less pressure, thereby reaches the purpose of refrigeration.
From the above, the choke valve that present embodiment provides can utilize the pressure differential of the moment that the compression refrigeration state begins and gets into the throttling duty automatically; Thereby make element of this choke valve replace magnetic valve and two elements of restricting element of throttling arrangement of the prior art, and volume is little, simple in structure; Significantly reduced the space hold rate of refrigeration system; Simultaneously, also save material, further practiced thrift cost.
In the above-described embodiments; As shown in Figure 2, the bottom center of spool 22 has first columnar projections 223, and sealing 25 is for being around in first columnar projections 223 annular boss on every side; Elastic component 26 is the compression spring; The top of elastic component 26 is set on the side of first columnar projections 223, and the end face central dip of valve seat 23 is formed for locating the locating slot 231 of elastic component 26, and the bottom of locating slot 231 is connected with through hole 24.Particularly, the two ends of elastic component 26 are replaced respectively on the bottom surface of spool 22 and the end face of valve seat 23 (bottom surface of locating slot 231); The shape of locating slot 231 can be complementary in the side view of elastic component 26, and for example when elastic component 26 was cylinder-shaped compression spring, the sidewall of locating slot 231 also can be cylindrical, with better location elastic component 26, prevents that it from squinting under pressure.To the good location of elastic component 26, can prevent to become moving of the elastic component 26 that possibly cause under the situation such as big or vibration in the present embodiment, guarantee the functional reliability and the reaction sensitivity of this choke valve at pressure.
In the above-described embodiments; The cross section of annular boss is an inclined wedge-shaped; Be provided with seal washer 232 at corresponding sealing 25 around the locating slot 231 and on the end face of valve seat 23, so that the ring-type bottom surface of sealing 25 is when abutting to the end face of valve seat 23, contacting of the end face of sealing 25 through seal washer 232 and valve seat 23 is tightr; Prevent the uneven poor sealing that causes, improved the functional reliability of this choke valve because of valve seat 23 surfaces.
Fig. 3 is the structure chart of another embodiment of choke valve of the present invention.In the present embodiment; The structure of sealing 25, valve seat 23 and different with the foregoing description to the positioning form of elastic component 26; As shown in Figure 3, sealing 25 is the cylinder on the bottom surface that is fixedly installed on spool 22, and throttling passage 221 runs through spool 22 and sealing 25; Elastic component 26 is the compression spring, and the top of elastic component 26 is set in the lateral surface of said sealing 25.Particularly, when compression spring when being cylindric compression spring, sealing 25 can be cylinder, so that the top of elastic component 26 can be set to the lateral surface of sealing 25 and is connected with sealing 25 through cover; Certainly, the cross-sectional area of sealing 25 should be as the criterion with the cross section that can cover whole through hole 24, so that the periphery of sealing 25 can contact with the end face of valve seat 23 and seal.
Further, as shown in Figure 3, the corresponding sealing 25 of the end face of valve seat 23 raises up and is formed for the sealing platform 233 that engages with sealing 25, and the bottom of elastic component 26 is set in the side of sealing platform 233; Through hole 24 runs through valve seat 23 and sealing platform 233., can the bottom of elastic component 26 be set in the side that seals platform 233 here,, prevent its skew, guarantee the reliably working of this choke valve so that elastic component 26 is further located through the sealing platform 233 that is arranged on the valve seat 23.
Further; The side of sealing 25 bottoms is the taper surface 225 that cooperates with through hole, and spool 22 overcomes elastic component 26 together with sealing 25 and slides to valve seat 23 under the pressure effect of cold-producing medium, and taper surface 225 faces of sealing 25 are resisted against on the sealing platform 233; Promptly contact with sealing platform 233 and seal through the taper surface 225 that is the inclined-plane; Can make contact area littler, thereby avoid further having improved restriction effect because of the bright and clean inadequately joint defective tightness that causes in sealing platform 233 surfaces.
In the above-described embodiments, as shown in Figure 7, throttling passage 221 is the multistage hole, with the size of convenient control throttling passage; Further; This multistage hole comprises the first cylindrical hole section 71, wedged hole section 72 and the second cylindrical hole section 73 successively along inlet 202 to outlet 203 directions; The first cylindrical hole section 71 equates that with the cross-sectional area of the port of wedged hole section 72 the second cylindrical hole section 73 equates with the cross-sectional area of the lower port of wedged hole section 72.This be because; When the sealing 25 and the spool 22 of the bar shape on being arranged on spool 22 bottom surfaces was formed in one, throttling passage 221 will be long, possibly cause cold-producing medium to flow through the overlong time of throttling passage 221; Can be arranged to the multistage hole this moment with throttling passage 221; When guaranteeing that restriction effect effectively freezes, also can improve the flow velocity of cold-producing medium, pressure is reduced to be controlled in the suitable scope.
In the above-described embodiments, valve seat 23 can be structure as a whole with valve pipe 20, or for produce respectively two parts, through welding or mode such as interference fit is fixedly connected and is integral.
In the above-described embodiments, the throttling passage on spool 22 or the valve seat 23 is the lip-deep throttling channel that is opened in spool 22 or valve seat 23, so that process is simpler.
In an embodiment of the present invention; The side of spool 22 offers the groove that is used for as the passage 3 that supplies cold-producing medium to pass through; Groove is positioned at the periphery that groove port on the bottom surface of spool all is positioned at elastic component, can not receive stopping of elastic component with the circulation of cold-producing medium, reduces circulating resistance.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (13)
1. a choke valve is characterized in that, comprising: a valve pipe, be slidingly equipped with a spool in the said valve pipe, and be provided with the stopper section that is used for the said spool of backstop in porch near said valve pipe; Be set with a valve seat near said valve pipe exit and on said valve inside pipe wall, said centre is provided with through hole; The inwall of the side of said spool and said valve pipe is formed for the passage that cold-producing medium passes through; Said spool or valve seat are provided with and are used for the throttling passage that cold-producing medium passes through; The bottom surface of said spool is provided with the tight sealing that contacts of valve seat end face that is used for around the said through hole; Said spool and said valve base chamber are pressed and are provided with elastic component, and said spool overcomes said elastic component and slides to said valve seat under the pressure effect of said cold-producing medium, and said sealing is resisted against on the end face of said valve seat.
2. choke valve according to claim 1; It is characterized in that the bottom center of said spool has first columnar projections, said sealing is to be around in said first columnar projections annular boss on every side; Said elastic component is the compression spring; The top of said elastic component is set on the side of said first columnar projections, and the end face central dip of said valve seat is formed for locating the locating slot of said elastic component, and the bottom of said locating slot is connected with said through hole.
3. choke valve according to claim 2 is characterized in that, the cross section of said annular boss is an inclined wedge-shaped, is provided with seal washer at corresponding said sealing around the said locating slot and on the end face at said valve seat.
4. choke valve according to claim 1; It is characterized in that; Said sealing is the cylinder that is fixedly installed on the bottom surface of said spool; Said throttling passage runs through said spool and sealing, and said elastic component is the compression spring, and the top of said elastic component is set in the lateral surface of said sealing.
5. choke valve according to claim 4 is characterized in that, the corresponding said sealing of the end face of said valve seat raises up and is formed for the sealing platform that engages with said sealing, and the bottom of said elastic component is set in the side of said sealing platform; Said through hole runs through said valve seat and said sealing platform.
6. choke valve according to claim 5; It is characterized in that; The side of said sealing bottom is the taper surface that cooperates with said through hole; Said spool overcomes said elastic component together with said sealing and slides to said valve seat under the pressure effect of said cold-producing medium, and the said taper surface of said sealing is resisted against said sealing platform.
7. according to claim 3 or 4 described choke valves, it is characterized in that the side of said spool offers the groove that the said cold-producing medium of a plurality of confessions passes through, the end face of said spool offers counterbore, and said counterbore is connected with said groove.
8. choke valve according to claim 7 is characterized in that, said throttling passage is the multistage hole.
9. choke valve according to claim 8; It is characterized in that; Comprise the first cylindrical hole section, wedged hole section and the second cylindrical hole section successively along entering the mouth to Way out; The said first cylindrical hole section equates that with the cross-sectional area of the port of said wedged hole section the said second cylindrical hole section equates with the cross-sectional area of the lower port of said wedged hole section.
10. choke valve according to claim 1 is characterized in that, said stop portion and said valve pipe are structure as a whole.
11. choke valve according to claim 1 is characterized in that, said valve seat and said valve pipe are structure as a whole.
12. choke valve according to claim 1 is characterized in that, the throttling passage on said spool or the seal receptacle is the lip-deep throttling channel that is opened in said spool or valve seat.
13. choke valve according to claim 4 is characterized in that, the side of said spool offers the groove that is used for as said passage, and said groove is positioned at the periphery that groove port on the bottom surface of said spool all is positioned at said elastic component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110255190 CN102313410B (en) | 2011-08-31 | 2011-08-31 | Throttling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110255190 CN102313410B (en) | 2011-08-31 | 2011-08-31 | Throttling valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102313410A true CN102313410A (en) | 2012-01-11 |
| CN102313410B CN102313410B (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110255190 Active CN102313410B (en) | 2011-08-31 | 2011-08-31 | Throttling valve |
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| Country | Link |
|---|---|
| CN (1) | CN102313410B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997541A (en) * | 2012-12-26 | 2013-03-27 | 合肥美的荣事达电冰箱有限公司 | Refrigerator |
| CN109695721A (en) * | 2017-10-23 | 2019-04-30 | 浙江三花智能控制股份有限公司 | Throttling stop valve and air-conditioning system with it |
| WO2020088447A1 (en) * | 2018-10-29 | 2020-05-07 | 宁波奥克斯电气股份有限公司 | Throttling apparatus and air conditioner |
| CN113685551A (en) * | 2020-05-18 | 2021-11-23 | 盾安环境技术有限公司 | Throttle valve |
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| US20050223740A1 (en) * | 2004-04-09 | 2005-10-13 | Valeo Climatisation S.A. | Expansion device for an air-conditioning system |
| WO2007054243A1 (en) * | 2005-11-09 | 2007-05-18 | Ixetic Mac Gmbh | Air-conditioning compressor with a differential-pressure limiting device |
| CN2924214Y (en) * | 2006-04-20 | 2007-07-18 | 钱志海 | Suction expansion valve |
| CN101298890A (en) * | 2008-03-04 | 2008-11-05 | 浙江沃尔达铜业有限公司 | Adjustable compression release valve |
| CN101625043A (en) * | 2009-08-13 | 2010-01-13 | 凯迈（洛阳）气源有限公司 | High-pressure reducing valve |
| CN201902741U (en) * | 2010-12-31 | 2011-07-20 | 李耀强 | Water pipe connector |
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2011
- 2011-08-31 CN CN 201110255190 patent/CN102313410B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050223740A1 (en) * | 2004-04-09 | 2005-10-13 | Valeo Climatisation S.A. | Expansion device for an air-conditioning system |
| WO2007054243A1 (en) * | 2005-11-09 | 2007-05-18 | Ixetic Mac Gmbh | Air-conditioning compressor with a differential-pressure limiting device |
| CN2924214Y (en) * | 2006-04-20 | 2007-07-18 | 钱志海 | Suction expansion valve |
| CN101298890A (en) * | 2008-03-04 | 2008-11-05 | 浙江沃尔达铜业有限公司 | Adjustable compression release valve |
| CN101625043A (en) * | 2009-08-13 | 2010-01-13 | 凯迈（洛阳）气源有限公司 | High-pressure reducing valve |
| CN201902741U (en) * | 2010-12-31 | 2011-07-20 | 李耀强 | Water pipe connector |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997541A (en) * | 2012-12-26 | 2013-03-27 | 合肥美的荣事达电冰箱有限公司 | Refrigerator |
| CN109695721A (en) * | 2017-10-23 | 2019-04-30 | 浙江三花智能控制股份有限公司 | Throttling stop valve and air-conditioning system with it |
| WO2020088447A1 (en) * | 2018-10-29 | 2020-05-07 | 宁波奥克斯电气股份有限公司 | Throttling apparatus and air conditioner |
| CN113685551A (en) * | 2020-05-18 | 2021-11-23 | 盾安环境技术有限公司 | Throttle valve |
| CN113685551B (en) * | 2020-05-18 | 2023-12-15 | 盾安环境技术有限公司 | Throttle valve |
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| Publication number | Publication date |
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| CN102313410B (en) | 2013-01-02 |
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