CN216244988U

CN216244988U - Anti-backflow structure for pipeline of refrigeration system

Info

Publication number: CN216244988U
Application number: CN202122997822.XU
Authority: CN
Inventors: 黄贵生; 黄懿翔; 黄春生; 王少勇
Original assignee: Zhejiang Chuangjia Hvac Technology Co ltd
Current assignee: Zhejiang Chuangjia Hvac Technology Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-04-08
Anticipated expiration: 2031-11-26

Abstract

The utility model discloses a pipeline backflow prevention structure of a refrigeration system, which relates to the technical field of refrigeration equipment, and adopts the technical scheme that: the oil storage device comprises an air pipe for conveying a refrigerant from bottom to top, wherein a plurality of oil storage elbows are arranged on the air pipe, a buffer memory device is connected to the lower sides of the oil storage elbows through connecting pipes, and the buffer memory device comprises a cavity with an adjustable volume and is used for buffering oil in the oil storage elbows. The utility model can keep the normal circulation of oil in the refrigeration system and improve the stability of the oil circulation.

Description

Anti-backflow structure for pipeline of refrigeration system

Technical Field

The utility model relates to the technical field of refrigeration equipment, in particular to a pipeline backflow prevention structure of a refrigeration system.

Background

The refrigerating system is provided with a compression condensing end and an air processing end, and the compression condensing end and the air processing end are connected through two groups of pipelines to respectively convey gaseous and liquid refrigerants.

When the compression condensation end is higher than the air treatment end, the main machine is on the upper part, and the internal machine is on the lower part; a section of rising vertical pipe is arranged between the main machine and the inner machine, and when the refrigerant flows back to the main machine on the upper side from the inner machine on the lower side, the refrigerant is likely to generate non-evaporation vaporization and is accumulated at the bottom; when the amount of the refrigerant oil stored at the bottom is large, the air pipe is blocked, and the refrigerant backflow of the air pipe is hindered and influenced.

At present, the transition is usually carried out by installing an oil trap on a rising air pipe, so that the upward normal backflow of oil is promoted; however, too much oil in the oil trap still occurs during the use process, and the oil trap generates a flow channel of a refrigerant; even when the oil is too much, the condition that the oil flows back upwards is generated, the refrigeration effect of the refrigeration system is influenced, and the normal work of the compressor is not facilitated.

Therefore, a new solution is needed to solve this problem.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving the above problems and providing a pipeline backflow prevention structure for a refrigeration system, which can maintain the normal circulation of oil in the refrigeration system and improve the stability of the oil circulation.

The technical purpose of the utility model is realized by the following technical scheme: the utility model provides a refrigerating system pipeline backflow prevention structure, includes the trachea of carrying the refrigerant from bottom to top, it is curved to set up a plurality of trapped fuel on the trachea, the curved downside of trapped fuel is connected with buffer memory device through the connecting pipe, buffer memory device includes that the appearance chamber with adjustable a volume for the bent interior fluid of trapped fuel of buffer memory.

The buffer device further comprises a piston cylinder, a sealing piston is connected to the piston in the piston cylinder, and the containing cavity is formed in one side, connected with the connecting pipe, of the sealing piston and the piston cylinder.

The utility model is further provided with a telescopic rod for driving the sealing piston, the sealing piston is fixedly connected with a supporting rod, and the supporting rod extends out of the piston cylinder and is connected with the telescopic end of the telescopic rod.

The utility model is further arranged that the sealing piston moves up and down, and the cavity is positioned at the lower side of the sealing piston.

The utility model is further arranged in that one side of the sealing piston, which is far away from the cavity, is provided with a second spring, and the second spring is pressed between the piston cylinder and the sealing piston and used for pushing the sealing piston to move towards the cavity side.

The telescopic rod is further arranged in such a way that the telescopic end of the telescopic rod is detachably connected with the supporting rod and is used for driving the sealing piston to enlarge the containing cavity.

The utility model is further arranged in that the support rod is connected with the telescopic rod through a connecting frame, one side of the connecting frame is fixed with the support rod, and the other side of the connecting frame is detachably connected with the telescopic end of the telescopic rod through a bolt.

The utility model is further set that the connecting pipe comprises a first connecting end, a second connecting end and a third connecting end, wherein the first connecting end and the second connecting end are both connected with the oil storage elbow, and the third connecting end is connected with the containing cavity; and one-way valves are arranged in the first connecting end and the second connecting end, and the one-way conduction directions of the one-way valves are opposite.

The utility model is further provided that the one-way valve comprises a first limiting ring, a second limiting ring and a valve core, wherein the valve core is positioned between the first limiting ring and the second limiting ring and is in abutting pressure sealing with the first limiting ring through a first spring; the abutting sealing positions of the valve core and the first limiting ring are both in conical surface structures.

The utility model is further arranged in such a way that a guide sliding rod is fixedly connected to the end face of the valve core, and a guide sliding hole for sliding guide with the guide sliding rod and a liquid outlet hole for oil liquid circulation are formed in the limiting ring.

In conclusion, the utility model has the following beneficial effects:

connect buffer memory device in the downside position of trapped fuel is bent, buffer memory device has the appearance chamber that each volume is adjustable, adjust through the solvent to holding the chamber, thereby can buffer memory trapped fuel in the middle of too much fluid, thereby reduce the influence of fluid to the refrigerant backward flow in the middle of the trapped fuel is bent, then can be in the fluid release trapped fuel is bent with the buffer memory slowly, along with the backward flow of refrigerant with fluid backward flow to compression condensation end, thereby can keep the stability of fluid backward flow in the middle of the refrigerating system.

Drawings

FIG. 1 is a schematic structural view of a pipeline backflow prevention structure of a refrigeration system according to the present invention;

FIG. 2 is a schematic view of the structure of the oil trap of the present invention;

FIG. 3 is a schematic view of the check valve of the present invention;

fig. 4 is a schematic structural diagram of a cache apparatus according to the present invention.

Reference numerals: 1. compressing the condensing end; 2. an air treatment end; 3. a liquid pipe; 4. an air tube; 5. oil trap; 6. a connecting pipe; 61. a first connecting end; 62. a second connecting end; 63. a third connecting end; 7. a one-way valve; 71. a first limiting ring; 72. a second limiting ring; 73. a valve core; 74. a first spring; 75. a conical surface; 76. a slide guide hole; 77. a guide slide bar; 78. a liquid outlet hole; 8. a cache device; 80. a cavity; 81. a piston cylinder; 82. a sealing piston; 83. a second spring; 84. a support bar; 9. a telescopic rod; 91. a telescopic end; 92. a bolt; 93. and a connecting frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a pipeline backflow prevention structure of a refrigeration system is installed in an air conditioning system having a vertical drop, wherein a compression condensation end 1 is located above, an air treatment end 2 is located below, and an air pipe 4 and a liquid pipe 3 are arranged in a vertical direction.

The structure mainly designs the arrangement structure of the air pipe 4, which comprises the air pipe 4 for conveying a refrigerant from bottom to top, wherein the air pipe 4 is connected with a plurality of oil storage bends 5, and generally, one oil storage bend 5 is added to every six meters of the ascending amplitude of the air pipe 4; all be connected with buffer device 8 through connecting pipe 6 at the downside of every trapped fuel bend 5, buffer device 8 has the adjustable appearance chamber 80 that holds of each volume, adjusts through the solvent that holds chamber 80 to can buffer excessive fluid in the middle of the trapped fuel bend 5, thereby reduce the influence of fluid in the middle of the trapped fuel bend 5 to the refrigerant backward flow. Then the cached oil can be slowly released into the oil storage elbow 5, and the oil flows back to the compression condensing end 1 along with the backflow of the refrigerant.

The buffer device 8 comprises a piston cylinder 81, wherein the piston cylinder 81 is used as a main body, a sealing piston 82 is arranged in the piston cylinder 81, the sealing piston 82 forms a piston connecting structure in the piston connecting structure, and a containing cavity 80 for buffering oil is formed on one side of the sealing piston 82 facing to a connecting pipe 6;

the sealing piston 82 in the piston cylinder 81 is driven by the external telescopic rod 9; specifically, a support rod 84 may be fixedly connected to one end surface of the sealing piston 82, and one end of the support rod 84 extends out of the piston cylinder 81 and is sealed by a sealing member; the extended end of the support rod 84 is connected to the telescopic end 91 of the telescopic rod 9, so as to drive the sealing piston 82.

The telescopic rod 9 can be used for adjusting the reciprocating displacement action of the sealing piston 82, so that the buffer storage and release of oil can be realized, and the adjustment of excessive oil in the oil trap 5 can be realized;

or the telescopic rod 9 can be detachably connected with the supporting rod 84, the telescopic rod 9 only adjusts the oil absorption amount of the buffer memory, and then the buffer memory oil is slowly released by self-negative action.

The second spring 83 can be installed on one side, away from the cavity 80, of the sealing piston 82, the second spring 83 is pressed between the piston cylinder 81 and the sealing piston 82, the sealing piston 82 is adjusted through the telescopic rod 9, when the cavity 80 is expanded, the second spring 83 is extruded by the sealing piston 82, certain elastic force is generated on the second spring 83, the elastic force of the second spring 83 pushes the sealing piston 82 to move towards the cavity 80, automatic returning action is formed, and the cached oil is gradually released.

The piston cylinder 81 can also be arranged in a vertical structure, wherein the sealing piston 82 moves vertically, and the cavity 80 is positioned at the lower side of the sealing piston 82; after the sealing piston 82 moves upwards and the buffer absorption is performed on the oil, the sealing piston 82 and the supporting rod 84 further exert pressure on the oil by gravity, so that the oil is more stably extruded from the cavity 80, and the slow release of the buffer oil is realized.

In order to realize that the telescopic rod 9 only realizes the expansion adjustment of the accommodating cavity 80, the supporting rod 84 is connected with the telescopic rod 9 through a connecting frame 93, one side of the connecting frame 93 is fixed with the supporting rod 84, and the other side of the connecting frame 93 is detachably connected with a telescopic end 91 of the telescopic rod 9 through a bolt 92; after the telescopic end 91 is fixed with the connecting frame 93 through the bolt 92, the lifting of the sealing piston 82 can be controlled and adjusted by the telescopic rod 9. After the bolt 92 is detached, the telescopic rod 9 pushes the connecting frame 93 to drive the cavity 80 to expand only in the process of ascending; and in the descending process of the telescopic rod 9, the sealing piston 82 is not driven, the sealing piston 82 automatically and gradually returns under the influence of the elastic action and the gravity action, and the buffer oil is gradually released.

As shown in fig. 2, the connection pipe 6 between the oil trap 5 and the buffer device 8 is a straight pipe, and three branch pipes are connected to the connection pipe 6 to form a first connection end 61, a second connection end 62 and a third connection end 63.

The third connecting end 63 is connected with the buffer cylinder and is connected with the containing cavity 80 in the buffer cylinder, and the first connecting end 61 and the second connecting end 62 are both connected with the oil storage bend 5, so that the oil storage bend 5 is communicated with the connecting pipe 6;

the first connecting end 61 and the second connecting end 62 are respectively connected to the liquid inlet side and the oil outlet side of the oil trap 5, the one-way valves 7 are respectively arranged on the first connecting end 61 and the second connecting end 62, and the flow direction and the flow stability of oil are regulated and controlled through the one-way valves 7; the one-way conduction directions of the two one-way valves 7 are opposite, the one-way valve 7 in the first connecting end 61 is only in one-way conduction towards the connecting pipe 6, and the one-way valve 7 in the second connecting end 62 is only in one-way conduction towards the oil storage bend 5, so that the connecting pipe 6 is separated from oil absorption and release, circulation of oil in the buffer device and the connecting pipe 6 is facilitated, and adverse effects caused by long-time gathering of part of oil in the buffer device 8 are avoided.

Referring to fig. 3, the check valve 7 includes a first limit ring 71, a second limit ring 72 and a valve core 73, the first limit ring 71 and the second limit ring 72 are installed coaxially with the pipeline, and the periphery of the first limit ring 71 and the second limit ring 72 is connected with the inner wall of the pipeline in a sealing manner; the valve core 73 is arranged between the first limit ring 71 and the second limit ring 72 and is pressed and sealed with the first limit ring 71 through a first spring 74; the abutting sealing positions of the valve core 73 and the first limiting ring 71 are both in a conical surface 75 structure, the conical structure can ensure that the valve core and the limiting ring stably abut against each other, an automatic centering state is formed after the abutting against, and the sealing stability is kept;

in order to increase the motion stability of the valve core 73, a guide slide rod 77 can be fixedly connected to the end surface of the valve core 73 facing the second limit ring 72, a guide slide hole 76 which is in sliding fit with the guide slide rod 77 is formed in the second limit ring 72, and the guide slide rod 77 extends into the guide slide hole 76 to form a slidable structure; and the first spring 74 can be sleeved on the guide rod 77, so that the stability of the first spring 74 can be maintained. In order to allow oil to pass through, a plurality of liquid outlet holes 78 can be formed in the second limiting ring 72, so that oil can be supplied to circulate, and the smoothness of the pipeline is kept.

Under the condition of stable operation, the two one-way valves 7 are in a closed state, and the telescopic rod 9 is required to drive the sealing piston 82 to generate negative pressure, so that the one-way valve 7 in the first connecting end 61 can be driven to be opened, oil is sucked in, and the oil is cached; and the one-way valve 7 is arranged in the second connecting end 62, and the opening of the one-way valve 7 needs a certain force to push the first spring 74, so that a certain stable deceleration can be formed in the oil releasing process, the slow release action of the oil is kept, and the oil releasing stability is improved.

The protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides a refrigerating system pipeline backflow prevention structure, includes trachea (4) of carrying the refrigerant from bottom to top, set up a plurality of oil deposits curved (5) on trachea (4), its characterized in that, oil deposit curved (5) downside is connected with buffer memory device (8) through connecting pipe (6), buffer memory device (8) include that a volume is adjustable holds chamber (80) for the fluid in the buffer memory oil deposit curved (5).

2. The pipeline backflow preventing structure of the refrigeration system as claimed in claim 1, wherein the buffer device (8) comprises a piston cylinder (81), a sealing piston (82) is connected to a piston in the piston cylinder (81), and the cavity (80) is formed on one side of a connecting pipe (6) connecting the sealing piston (82) and the piston cylinder (81).

3. The pipeline backflow preventing structure of the refrigeration system as claimed in claim 2, further comprising a telescopic rod (9) for driving the sealing piston (82), wherein the sealing piston (82) is fixedly connected with a support rod (84), and the support rod (84) extends out of the piston cylinder (81) and is connected with a telescopic end (91) of the telescopic rod (9).

4. The structure of claim 3, wherein the sealing piston (82) moves up and down, and the cavity (80) is located at the lower side of the sealing piston (82).

5. The pipeline backflow prevention structure of the refrigeration system as claimed in claim 3, wherein a second spring (83) is arranged on one side of the sealing piston (82) away from the cavity (80), and the second spring (83) is pressed between the piston cylinder (81) and the sealing piston (82) to push the sealing piston (82) to move towards the cavity (80).

6. Refrigeration system pipeline backflow prevention structure according to claim 4 or 5, wherein the telescopic end (91) of the telescopic rod (9) is detachably connected with a support rod (84) for driving a sealing piston (82) to expand the cavity (80).

7. The pipeline backflow prevention structure of the refrigeration system as claimed in claim 6, wherein the support rod (84) is connected with the telescopic rod (9) through a connecting frame (93), one side of the connecting frame (93) is fixed with the support rod (84), and the other side of the connecting frame is detachably connected with the telescopic end (91) of the telescopic rod (9) through a bolt (92).

8. The pipeline backflow prevention structure of the refrigeration system as claimed in claim 1, wherein the connecting pipe (6) comprises a first connecting end (61), a second connecting end (62) and a third connecting end (63), the first connecting end (61) and the second connecting end (62) are connected with the oil trap (5), and the third connecting end (63) is connected with the accommodating cavity (80); all set up check valve (7) in link one (61) and link two (62), the one-way conduction direction of check valve (7) is opposite.

9. The pipeline backflow prevention structure of the refrigeration system as claimed in claim 8, wherein the check valve (7) comprises a first limit ring (71), a second limit ring (72) and a valve core (73), and the valve core (73) is located between the first limit ring (71) and the second limit ring (72) and is in abutting pressure sealing with the first limit ring (71) through a first spring (74); the abutting sealing positions of the valve core (73) and the first limiting ring (71) are both in a conical surface (75) structure.

10. The anti-backflow structure for the refrigeration system pipeline according to claim 9, wherein a guide sliding rod (77) is fixedly connected to an end surface of the valve core (73), and a guide sliding hole (76) for slidably guiding the guide sliding rod (77) and a liquid outlet hole (78) for oil to flow through are formed in the limiting ring.