CN102758941A - Refrigeration equipment and one-way valve thereof - Google Patents
Refrigeration equipment and one-way valve thereof Download PDFInfo
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- CN102758941A CN102758941A CN2011101107996A CN201110110799A CN102758941A CN 102758941 A CN102758941 A CN 102758941A CN 2011101107996 A CN2011101107996 A CN 2011101107996A CN 201110110799 A CN201110110799 A CN 201110110799A CN 102758941 A CN102758941 A CN 102758941A
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- 238000005057 refrigeration Methods 0.000 title abstract description 10
- 230000000694 effects Effects 0.000 abstract description 15
- 238000000034 method Methods 0.000 description 15
- 230000009467 reduction Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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Abstract
The invention discloses a one-way valve, which comprises a valve body (1), a valve seat (2), a valve core (3) and a guide component (5), wherein a stop bump (4) is arranged in the valve seat (2); the guide component (5) is used for guiding the valve core (3) to move along an axial central line of the one-way valve, is fixedly connected with one of the valve core (3) and the stop bump (4) and is slidably connected with the other one of the valve core (3) and the stop bump (4); the guide component (5) is arranged in the valve seat (2), so that the situation that the valve core (3) can only move in three degrees of freedom is changed into the situation that the valve core (3) can only move in one degree of freedom, i.e., the valve core (3) can only reciprocally move along the axial central line to prevent the phenomenon of vertical tilting of the valve core (3); and thus, the working stability of the valve core is guaranteed. The invention also discloses refrigeration equipment, which comprises a compressor and the one-way valve, wherein the one-way valve is connected to an exhaust pipe of the compressor; and the refrigeration equipment has corresponding technical effects.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, relate in particular to a kind of one-way valve that is used for chiller plant.The invention still further relates to a kind of chiller plant that comprises above-mentioned one-way valve.
Background technique
Chiller plant is the used equipment of refrigerating operation; What application was the widest at present is compression refrigeration equipment; Can be divided into steam compression type refrigerating apparatus and gas compression refrigeration equipment again by the refrigeration kind, mainly be to rely on pressure that the effect of compressor improves refrigeration agent with the realization refrigeration cycle.
One-way valve is the vitals in the chiller plant, is installed on the exhaust ports of the compressor of chiller plant, compressor reverse rotation when being used to prevent to shut down, or prevent that refrigeration agent from flowing to the not compressor of running from the compressor of running.
Please refer to Fig. 1, Fig. 1 is the structural representation of one-way valve in the existing technology.Briefly introduce the defective that this one-way valve exists in the course of the work below.
In the existing technology, as shown in Figure 1, one-way valve commonly used comprise valve body 1 ', valve seat 2 ', spool 3 ' and retaining Fig. 4 '.During work, spool 3 ' under the effect of both sides pressure reduction, move back and forth reaches and closes or the purpose of open check valve.
Yet, since existing one-way valve location rely on spool 3 ' with respect to valve seat 2 ' reciprocatingly slide and position, in the working procedure; Impurity in the medium usually be blocked in spool 3 ' and valve seat 2 ' inwall between; In order to ensure spool 3 ' not stuck in moving process by impurity, must add big valve core 3 ' and valve seat 2 ' inwall between the gap, this just causes after repeatedly opening and closing; Spool 3 ' meeting has a down dip on occurring, with unsettled phenomenon such as valve seat 2 ' misalign, reliability of products is descended.
In addition; The switching of existing one-way valve relies on the pressure reduction on spool 3 ' both sides to promote spool 3 ' to-and-fro motion; When spool 3 ' after opening, if the pressure reduction on both sides is too little, with the phenomenon that causes spool 3 ' can't reset, spool 3 ' can't close; Thereby the refrigerant abnormal flow that causes whole system causes compressor to be scrapped when serious.
Therefore how on the basis of existing technology,, improve the structure of existing one-way valve, make spool and valve seat centering, stable operation all the time, and have the valve core reset good effectiveness, be the present urgent problem of those skilled in the art.
Summary of the invention
The technical problem that the present invention will solve is that a kind of one-way valve that is used for chiller plant is provided, this one-way valve working stability, spool all the time vertically the direction of center line move, and have the valve core reset good effectiveness.Another technical problem that the present invention will solve is that a kind of chiller plant that comprises above-mentioned one-way valve is provided.
For solving the problems of the technologies described above, the present invention provides a kind of one-way valve, comprises valve body, valve seat and spool, is provided with retaining figure in the said valve seat; Also comprise the guide element that the said spool of guiding moves along the longitudinal center line of said one-way valve; Among said guide element and said spool and the said retaining figure one is fixedly connected, and is slidingly connected with another person.
Preferably, said guide element is a directional post, and an end of said directional post is plugged in said retaining figure, and its other end is fixedly connected with said spool; And said directional post and said valve seat, said spool centering.
Preferably, said directional post and said spool are injected into one.
Preferably, said spool comprises head and afterbody, and said afterbody is supported in the diapire of said valve seat, and and the roof of said valve seat between gapped.
Preferably, be set with spring outside the part of said directional post between said spool and said retaining figure, and when said one-way valve was closed, said spring was in compressive state.
Preferably, the two ends of said spring are connected with said spool, said retaining figure respectively.
Preferably, the thickness range of said retaining figure is 2mm to 5mm.
Preferably, the cross section of said retaining figure is a star structure, and said directional post is plugged in the center of said star structure.
Preferably, said guide element is a plurality of position-limited levers that laterally arrange, and the two ends of a plurality of said position-limited levers connect said valve seat and said retaining figure respectively; At said one-way valve radially, said spool is connected in the inside of a plurality of said position-limited levers.
One-way valve provided by the present invention comprises valve body, spool, valve seat and retaining figure, also comprises the guide element that Pilot poppet is moved along the longitudinal center line of one-way valve; Among guide element and spool and the retaining figure one is fixedly connected, and is slidingly connected with another person.
Adopt such structure; Under the leading role of guide element; Spool only becomes in the one degree of freedom motion from three degree of freedom is all removable in the course of the work, promptly only vertically center line move back and forth, compared with prior art; Avoid spool occur having a down dip, with unsettled phenomenons such as valve seat misaligns, improved the functional reliability of product greatly.
In the concrete mode of execution of another kind, the outer cover of the part between spool and retaining figure of directional post is equipped with spring, and when one-way valve was closed, spring was in compressive state.Adopt such structure; When spool after opening one-way valve under the differential pressure action; Even the pressure of spool both sides equates that perhaps the pass valve pressure of spool is a bit larger tham the cracking pressure of spool, rely on the elastic force of spring; That spool still can be replied is mobile, close one-way valve, makes the better reduction of one-way valve.In addition, when the pass of this one-way valve valve pressure greater than cracking pressure, and pressure reduction replys in the moving process at spool when big, because the elastic force of spring makes spool can unexpected, fierce collision not take place with valve seat, played the effect of buffering.
The present invention also provides a kind of chiller plant, comprises compressor; Also comprise foregoing one-way valve, said one-way valve is connected in the outlet pipe of said compressor.
Because above-mentioned one-way valve has above-mentioned technique effect, therefore, comprises that the chiller plant of this one-way valve also should have the corresponding techniques effect, repeats no more at this.
Description of drawings
Fig. 1 is the structural representation of one-way valve in the existing technology;
Fig. 2 is the structural representation of a kind of embodiment of one-way valve provided by the present invention;
Structural representation when Fig. 3 is in the valve port open position for the one-way valve among Fig. 2;
Fig. 4 is the partial enlarged drawing of the spool installation place among Fig. 2;
Fig. 5 is spool and the sectional view of valve seat joint among Fig. 2;
Fig. 6 is the structural representation of the another kind of embodiment of one-way valve provided by the present invention;
Fig. 7 is the side view that the valve seat among Fig. 6 is connected with spool;
Fig. 8 is the structural representation of the third embodiment of one-way valve provided by the present invention;
Fig. 9 is the side view that the valve seat among Fig. 8 is connected with spool;
Figure 10 is the structural representation of a kind of embodiment of the retaining figure among Fig. 2;
Figure 11 is the structural representation of the another kind of embodiment of the retaining figure among Fig. 2.
Wherein, reference character among Fig. 1 and the corresponding relation between the component names are:
1 ' valve body; 2 ' valve seat; 3 ' spool; 4 ' retaining figure;
Reference character and the corresponding relation between the component names among Fig. 2 to Figure 11 are:
1 valve body; 2 valve seats; 21 diapires; 22 roofs; 3 spools; 31 afterbodys; 32 heads; 4 retaining figure; 5 guide elements; 6 springs.
Embodiment
Core of the present invention is that a kind of one-way valve that is used for chiller plant is provided, this one-way valve working stability, and spool and valve seat be centering all the time, and has the valve core reset good effectiveness.Another core of the present invention is that a kind of chiller plant that comprises above-mentioned one-way valve is provided.
In order to make those skilled in the art understand technological scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.
Please refer to Fig. 2 and Fig. 3, Fig. 2 is the structural representation of a kind of embodiment of one-way valve provided by the present invention; Structural representation when Fig. 3 is in the valve port open position for the one-way valve among Fig. 2.
In a kind of concrete mode of execution, as shown in Figures 2 and 3, one-way valve provided by the present invention, it comprises valve body 1, valve seat 2, spool 3, retaining Fig. 4 and guide element 5; Valve body 1 is located at the outside of one-way valve, is the pipeline of media flow; Valve seat 2 is located at the inside of valve body 1, can be fixedly connected with valve body 1 through the mode of cutting, and valve seat 2 is provided with the valve port of one-way valve; Spool 3 is located at the inside of valve seat 2, and spool 3 moves back and forth according to the pressure difference of its both sides, thereby realizes close port or open valve port; Retaining Fig. 4 is located at the inside of valve seat 2, is used to limit the maximum displacement of spool 3; Guide element 5 is used for the motion of Pilot poppet 3, and its longitudinal center line along one-way valve is moved, and one among this guide element 5 and spool 3 and retaining Fig. 4 is fixedly connected, and is slidingly connected with another person.
In preferred scheme, above-mentioned guide element 5 can be directional post, and this directional post cross setting, one of which end are plugged in the center of retaining Fig. 4, and its other end is connected with spool 3, and this directional post and valve seat 2, the setting of spool 3 centerings.
Be employed in the structure that connects directional post between spool 3 and retaining Fig. 4; In the course of the work, spool 3 drives directional post and in retaining Fig. 4, reciprocatingly slides along with the pressure difference of both sides moves back and forth; Because directional post and valve seat 2, spool 3 centerings; Guaranteed that spool 3 moves horizontally all the time, thus avoid spool 3 occur having a down dip, with unsettled phenomenons such as valve seat 2 misaligns, improved the functional reliability of product greatly.
This shows, guide element 5 is set in valve seat 2, make spool 3 only become in the one degree of freedom motion from three degree of freedom is all removable, promptly only vertically center line move back and forth, thereby guaranteed the working stability of spool 3.
Need to prove, do not limit the specific constructive form of guide element 5 in the foregoing description, except directional post, can also be other structural type.Do not limit the concrete Placement of directional post and spool 3 yet, in fact, connect guide element 5 between every spool 3 and retaining Fig. 4, can make the one-way valve that spool 3 moves all the time in horizontal plane, all in protection scope of the present invention.
The Placement of above-mentioned directional post and spool 3 can also further be set.
In the concrete mode of execution of another kind, above-mentioned directional post and spool 3 can injection moulding in being one.Injection moulding is the common method of production moulding in the industrial products; Make the end product shape that can obtain spool 3 and directional post in this way; No longer need other processing in installation or before, and have advantages such as simple in structure, easy to process as the final finished use.Certainly, do not limit the concrete grammar of injection moulding here, can be rubber injection mold, can be rubber injection mold yet.
In addition, above-mentioned directional post can also adopt bolt to be connected, to rivet with spool 3, perhaps waits other mode to connect with the Bond bonding.
The specific constructive form of above-mentioned spool 3 can also further be set.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the partial enlarged drawing of the spool installation place among Fig. 2; Fig. 5 is spool and the sectional view of valve seat joint among Fig. 2.
In the concrete mode of execution of another kind; Like Fig. 4 and shown in Figure 5, above-mentioned spool 3 comprises head 32 and afterbody 31, and wherein the cross section of afterbody 31 can be for irregularly shaped; The afterbody 31 of spool 3 is supported in the diapire 21 of valve seat 2, and and the roof 22 of valve seat 2 between gapped.Adopt such structure, spool 3 is when moving back and forth, and afterbody 31 is supported on the valve body 1, can prevent end that directional post is connected with spool 3 because gravity generation vertical displacement, thereby increases the working stability of spool 3; Spool 3 tops and spool 3 gaps are bigger, can prevent that impurity from stopping up, and avoid spool 3 stuck by impurity, play the effect that increases the one-way valve flow simultaneously.In addition, adopt the spool 3 of this structure can also reduce material, reduce the cost of production of one-way valve.
What specify is that " head " refers to the part of participating in the shutoff valve port in the spool 3; " afterbody " refers to the part of not participating in the shutoff valve port in the spool 3; " roof " refers to the top of valve seat 2 in the accompanying drawing 4; " diapire " refers to the bottom of valve seat 2 in the accompanying drawing 4; Should be appreciated that these component names are that benchmark is set up with accompanying drawing among this paper, their appearance should not influence protection scope of the present invention.
The specific constructive form of above-mentioned guide element 5 can also further be set.
Please refer to Fig. 6 and Fig. 7, Fig. 6 is the structural representation of the another kind of embodiment of one-way valve provided by the present invention; Fig. 7 is the side view that the valve seat among Fig. 6 is connected with spool.
In the concrete mode of execution of another kind, like Fig. 6 and shown in Figure 7, above-mentioned guide element 5 is a plurality of position-limited levers that laterally arrange, and the two ends of a plurality of position-limited levers connect valve seat 2 and retaining Fig. 4 respectively; At one-way valve radially, spool 3 is connected in the inside of a plurality of position-limited levers.
Particularly, the cross section of spool 3 is circular; Guide element 5 can be three position-limited levers of being located between valve seat 2 and retaining Fig. 4, and three's circumferentially evenly being provided with along one-way valve; Spool 3 is located at the inside of three said position-limited levers, and the periphery wall of spool 3 all contacts with three said position-limited levers.
Adopt such structure, three position-limited levers are coated on the outside of spool 3, constitute the guide channel of spool 3; Spool 3 can only be moved along the direction of the longitudinal center line of one-way valve; Can avoid spool 3 to have a down dip in the course of the work, simultaneously, because position-limited lever is thinner; Make the one-way valve of this structure also have the bigger technique effect of flow, the cross section that this structure is suitable for spool 3 is circular one-way valve.
Certainly, except the motion of 3 position-limited lever Pilot poppet 3 of above-mentioned employing, can also adopt other mode.Please in the lump with reference to figure 8 and Fig. 9, Fig. 8 is the structural representation of the third embodiment of one-way valve provided by the present invention; Fig. 9 is the side view that the valve seat among Fig. 8 is connected with spool.As shown in the figure, when the afterbody cross section of spool 3 when being square, guide element 5 can be four position-limited levers of being located between valve seat 2 and retaining Fig. 4, and four circumferentially evenly being provided with along one-way valve; Spool 3 is located at the inside of four position-limited levers, and the periphery wall of spool 3 all contacts with four position-limited levers.
Similar with said structure, adopt this structure, 3 directions along the longitudinal center line of one-way valve of spool are moved, have a down dip on avoiding in the course of the work, and this one-way valve also has the bigger technique effect of flow.
Certainly, above-mentioned guide element 5 is not limited to above-mentioned three kinds of structural types, can also be other specific constructive form, for example with above-mentioned locating column and position-limited lever structural type such as combine.
The specific constructive form of above-mentioned one-way valve can also further be set.
In the concrete mode of execution of another kind, as shown in Figures 2 and 3, the outside of the part of directional post between spool 3 and retaining Fig. 4 can be set with spring 6, and when one-way valve was closed, spring 6 was in compressive state.
Adopt such structure; When spool 3 after opening one-way valve under the differential pressure action; Even the pressure of spool 3 both sides equates that perhaps the pass valve pressure of spool 3 is a bit larger tham the cracking pressure of spool 3, rely on the elastic force of spring 6; That spool 3 still can be replied is mobile, close one-way valve, makes the better reduction of one-way valve.In addition, when the pass of this one-way valve valve pressure greater than cracking pressure, and pressure reduction replys in the moving process at spool 3 when big, because the elastic force of spring 6 makes spool 3 can unexpected, fierce collision not take place with valve seat 2, played the effect of buffering.
The annexation of above-mentioned spring 6 and spool 3, retaining Fig. 4 can also further be set.
In scheme more specifically; Above-mentioned spring 6 can be set to that an end is not connected with spool 3, the other end is not connected with retaining Fig. 4 yet; Be that spring 6 is merely and is set in the outside spring 6 of directional post, such one-way valve has simple in structure, and the equal characteristics easily of installation and removal.
Above-mentioned spring 6 can also be set to an end and be connected with spool 3; And the other end is connected with retaining Fig. 4; When the internal diameter of the internal diameter of spring 6 and directional post differed big slightly, the structure that adopts two ends to be fixedly connected can avoid spring 6 in the vertical direction in the process that elongates or shortens to misplace; Thereby guarantee spring 6 frank and outspoken stretching in horizontal plane all the time, further strengthened the stability of spring 6 work.Certainly, above-mentioned spring 6 is not limited to above-mentioned Placement, only can also be set to that an end is connected with spool 3, perhaps only an end with keep off Fig. 4 and be connected.
The specific constructive form of above-mentioned retaining Fig. 4 can also further be set.
Please refer to Figure 10 and Figure 11, Figure 10 is the structural representation of a kind of embodiment of the retaining figure among Fig. 2; Figure 11 is the structural representation of the another kind of embodiment of the retaining figure among Fig. 2.
In the concrete mode of execution of another kind, the thickness range of above-mentioned retaining Fig. 4 can be 2mm to 5mm.When the thickness of retaining Fig. 4 during less than 2mm, because thickness is too little, can not play the effect of location, can cause the poor stability of spool 3, simultaneously because too thin, cause the difficulty of processing bigger; When the thickness of retaining Fig. 4 during greater than 5mm, because thickness is too big, can cause the cost of one-way valve to increase, influence the maximum opening displacement of spool 3 simultaneously, cause product flow to reduce.Such thickness range is set, can guarantees the working stability of spool 3, play the effect of location, can not increase the cost of production of one-way valve again, also have the characteristics of convenient processing and manufacture.
In the scheme, like Figure 10 and shown in Figure 11, above-mentioned retaining Fig. 4 can be set to star structure more specifically, and above-mentioned directional post is plugged in the center of star structure.Retaining Fig. 4 of star can either play the effect of restriction spool 3 displacements, the medium in the one-way valve is circulated smoothly, and have advantage simple in structure, convenient processing and manufacture.Certainly, above-mentioned retaining Fig. 4 is not limited to star structure, can also wait other structural type for circle.Valve seat 2 can carry out the riveting reducing in the end that retaining Fig. 4 is set, and anti-backstop Fig. 4 breaks away from from valve seat 2.
In addition, the present invention also provides a kind of chiller plant, comprises compressor; Also comprise foregoing one-way valve, this one-way valve is connected in the outlet pipe of compressor.
Because above-mentioned one-way valve has above-mentioned technique effect, therefore, comprises that the chiller plant of this one-way valve also should have the corresponding techniques effect, repeats no more at this.
More than a kind of chiller plant provided by the present invention and one-way valve thereof have been carried out detailed introduction.Used concrete example among this paper principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. an one-way valve comprises valve body (1), valve seat (2) and spool (3), is provided with retaining figure (4) in the said valve seat (2); It is characterized in that, also comprise the guide element (5) that the said spool of guiding (3) moves along the longitudinal center line of said one-way valve; Among said guide element (5) and said spool (3) and the said retaining figure (4) one is fixedly connected, and is slidingly connected with another person.
2. one-way valve according to claim 1 is characterized in that, said guide element (5) is a directional post; One end of said directional post is plugged in said retaining figure (4), and its other end is fixedly connected with said spool (3); And said directional post and said valve seat (2), said spool (3) centering.
3. one-way valve according to claim 2 is characterized in that, said directional post and said spool (3) are injected into one.
4. one-way valve according to claim 2 is characterized in that, said spool (3) comprises head (32) and afterbody (31), and said afterbody (31) is supported in the diapire (21) of said valve seat (2), and and the roof (22) of said valve seat (2) between gapped.
5. according to each described one-way valve of claim 2-4, it is characterized in that the part that said directional post is positioned between said spool (3) and the said retaining figure (4) is set with spring (6) outward, and when said one-way valve was closed, said spring (6) was in compressive state.
6. one-way valve according to claim 5 is characterized in that, the two ends of said spring (6) are connected with said spool (3), said retaining figure (4) respectively.
7. according to each described one-way valve of claim 2-4, it is characterized in that the thickness range of said retaining figure (4) is 2mm to 5mm.
8. one-way valve according to claim 7 is characterized in that, the cross section of said retaining figure (4) is a star structure, and said directional post is plugged in the center of said star structure.
9. one-way valve according to claim 1 is characterized in that, said guide element (5) is a plurality of position-limited levers that laterally arrange, and the two ends of a plurality of said position-limited levers connect said valve seat (2) and said retaining figure (4) respectively; At said one-way valve radially, said spool (3) is connected in the inside of a plurality of said position-limited levers.
10. a chiller plant comprises compressor; It is characterized in that also comprise each described one-way valve like claim 1-9, said one-way valve is connected in the outlet pipe of said compressor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110110799.6A CN102758941B (en) | 2011-04-29 | 2011-04-29 | A kind of chiller plant and one-way valve thereof |
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| CN201110110799.6A CN102758941B (en) | 2011-04-29 | 2011-04-29 | A kind of chiller plant and one-way valve thereof |
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| CN102758941B CN102758941B (en) | 2016-03-02 |
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Cited By (5)
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| CN104265919A (en) * | 2014-10-09 | 2015-01-07 | 平原机器厂（新乡） | Valve spool and rapid escape valve applying same and pneumatic piston actuating mechanism |
| CN104405937A (en) * | 2014-11-18 | 2015-03-11 | 安徽江淮汽车股份有限公司 | Check valve structure for fuel oil pump |
| CN107314135A (en) * | 2016-04-26 | 2017-11-03 | 浙江三花制冷集团有限公司 | A kind of check valve |
| CN113757426A (en) * | 2021-10-09 | 2021-12-07 | 浙江亿田智能厨电股份有限公司 | Gas range hose gas interception structure |
| CN115479411A (en) * | 2021-05-31 | 2022-12-16 | 和承R&A株式会社 | Check valve, refrigerant pipe system having the same, and method of assembling the same |
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|---|---|---|---|---|
| CN104265919A (en) * | 2014-10-09 | 2015-01-07 | 平原机器厂（新乡） | Valve spool and rapid escape valve applying same and pneumatic piston actuating mechanism |
| CN104265919B (en) * | 2014-10-09 | 2017-01-11 | 平原机器厂（新乡） | Valve spool and rapid escape valve applying same and pneumatic piston actuating mechanism |
| CN104405937A (en) * | 2014-11-18 | 2015-03-11 | 安徽江淮汽车股份有限公司 | Check valve structure for fuel oil pump |
| CN107314135A (en) * | 2016-04-26 | 2017-11-03 | 浙江三花制冷集团有限公司 | A kind of check valve |
| CN115479411A (en) * | 2021-05-31 | 2022-12-16 | 和承R&A株式会社 | Check valve, refrigerant pipe system having the same, and method of assembling the same |
| CN113757426A (en) * | 2021-10-09 | 2021-12-07 | 浙江亿田智能厨电股份有限公司 | Gas range hose gas interception structure |
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| Publication number | Publication date |
|---|---|
| CN102758941B (en) | 2016-03-02 |
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Effective date of registration: 20170119 Address after: 312500 Zhejiang city of Shaoxing province Xinchang County Chengguan town of Liquan Patentee after: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. Address before: 312500 Liquan village of Chengguan Zhejiang city of Shaoxing province Xinchang County town Patentee before: ZHEJIANG SANHUA Co.,Ltd. |
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Effective date of registration: 20231103 Address after: 312500 Daming new area, Zhejiang Xinchang Economic Development Zone, Xinchang County, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Sanhua Commercial Refrigeration Co.,Ltd. Address before: Xia Li Quan, Chengguan Town, Xinchang County, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. |