A device for distributing coolant fluid in a vest-type air conditioner

Abstract

The present application relates to air conditioner vest technical field, the present application discloses a kind of air conditioner vest cooling liquid's shunt device, including cooling liquid cooling system, still including the cooling liquid flow pipe line of cooling liquid cooling system closed loop intercommunication, the cooling liquid flow pipe line includes upper liquid pipe, arc connecting pipe, shoulder transition pipe, descending backflow pipe, dovetail type bending pipe, total liquid inlet pipe, total liquid outlet pipe;Traditional S-shaped cooling pipeline is converted into split type pipeline, so that pipeline initial deceleration motion is initially carried out, heat exchange efficiency is very high, so that the cooling effect of front area is not affected by the speed of movement, when the cooling liquid crosses shoulder to reach back, the cooling liquid is cooled after a round, temperature is reduced, but only through a front body height, so the change amount is much smaller than the temperature change amount of S-shaped cooling pipe through a front body, and the cooling liquid is accelerated at this time, the flow rate increases in this stage, reduces the use of power source.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air-conditioning vests, and specifically relates to a cooling liquid shunt device for air-conditioning vests. BACKGROUND

[0002] Traditional air-conditioning vests adopt an integrated S-shaped cooling pipeline layout mode, the S-shaped cooling pipeline is mainly arranged on the surface of the vest, has one inlet end and one outlet end, and liquid is transported by a circulating pump. Since the flow speed of the liquid in the pipeline is affected by the inner wall of the pipeline, kinetic energy is lost. As the length of the S-shaped cooling pipeline increases, the circulating pump needs more power. Meanwhile, the S-shaped cooling pipeline has another disadvantage. As kinetic energy is lost, the flow speed at the end of the pipeline is less than that at the front end, resulting in inconsistent flow at different points of the pipeline. This situation is amplified due to the excessively long length of the S-shaped cooling pipeline, so that the heat exchange efficiency at each point of the vest is inconsistent. The farther the distance from the water inlet pipe, the lower the temperature of the cooling liquid, and the lower the flow speed, resulting in lower heat exchange efficiency. SUMMARY

[0003] The present application aims to provide a cooling liquid shunt device for air-conditioning vests to solve the problems in the background.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A cooling liquid shunt device for air-conditioning vests, comprising a cooling liquid cooling system, further comprising a cooling liquid flow pipeline in closed loop communication with the cooling liquid cooling system, the cooling liquid flow pipeline comprising an upper liquid pipe, an arc-shaped connecting pipe, a shoulder transition pipe, a descending backflow pipe, a dovetail-shaped bent pipe, a total liquid inlet pipe and a total liquid outlet pipe.

[0006] The total liquid inlet pipe, the upper liquid pipe and the arc-shaped connecting pipe constitute a front shunt pipeline. The total liquid inlet pipe is laid at the lowermost part of the front of the vest and is in communication with the water supply pipeline of the cooling liquid cooling system. The upper liquid pipes are horizontally and equidistantly distributed above the total liquid inlet pipe and are in communication with each other. The upper ends of the upper liquid pipes are gathered below the front shoulder through the arc-shaped connecting pipes.

[0007] The arc-shaped connecting pipe, the descending backflow pipe, the dovetail-shaped bent pipe and the total liquid outlet pipe constitute a back shunt descending pipeline. The total liquid outlet pipe is laid directly below the back of the vest and is in communication with the backwater pipeline of the cooling liquid cooling system. The descending backflow pipes are horizontally and equidistantly distributed above the total liquid outlet pipe and are in communication with each other. The upper end of the total liquid outlet pipe is gathered below the back shoulder through the arc-shaped connecting pipe. The dovetail-shaped bent pipe is arranged at the middle part of the descending backflow pipe. The dovetail-shaped bent pipe has four arc-shaped transition pipes and two ascending pipeline areas.

[0008] Several shoulder transition pipes are distributed on the back heart shoulder, two ends of the shoulder transition pipe are communicated with the arc-shaped connecting pipe of the front surface and the arc-shaped connecting pipe of the back surface respectively, and a closed loop pipeline is formed.

[0009] The cooling liquid flow pipeline is provided with a diameter-adjusting heat preservation execution bin, the diameter-adjusting heat preservation execution bin is arranged on the side of the inner wall of the cooling liquid flow pipeline away from the body, an open surface of the diameter-adjusting heat preservation execution bin is close to the side of the cavity of the cooling liquid flow pipeline, and the open surface of the diameter-adjusting heat preservation execution bin is sealed by an elastic sealing film.

[0010] The back heart is provided with a diameter-adjusting control assembly for controlling deformation of the elastic sealing film, the diameter-adjusting control assembly comprises a micro air pump, a diameter-adjusting gas path and a gas valve, an output end of the micro air pump is communicated with the diameter-adjusting gas path, the diameter-adjusting gas path is communicated with the diameter-adjusting heat preservation execution bin in the liquid inlet pipe, and the gas valve is arranged between the diameter-adjusting gas path and the diameter-adjusting heat preservation execution bin.

[0011] As a further scheme of the present application, the descending return pipes are divided into two groups with the center line of the back heart as a center line, the dovetail type bent pipes on the two groups of descending return pipes are symmetrically distributed based on the center line, and the dovetail type bent pipes are located on the side of the descending return pipe close to the center line.

[0012] As a further scheme of the present application, the back heart shoulder is provided with a plurality of anti-folding shoulder pipes for accommodating the shoulder transition pipes, the anti-folding shoulder pipe is composed of an elastic pipe, a plurality of bending grooves for facilitating bending are formed in the elastic pipe, the anti-folding shoulder pipe is sleeved outside the shoulder transition pipe, and a buffer pad layer in contact with the shoulder is fixedly connected to the bottom of the anti-folding shoulder pipe.

[0013] As a further scheme of the present application, the dovetail type bent pipe itself and the dovetail type bent pipe and the descending return pipe have four bending points, and the four bending points are smoothly transitioned through arc-shaped transition pipes.

[0014] As a further scheme of the present application, when the shoulder transition pipe is bent, the total liquid inlet pipe is flush with the total liquid outlet pipe.

[0015] Front surface cooling

[0016] The upper liquid pipe, the arc-shaped connecting pipe and the total liquid inlet pipe form a front split flow pipe, the water supply pipe of the cooling liquid cooling system is communicated with the total liquid inlet pipe, and then the water pump provides power for the cooling liquid, so that the cooling liquid enters the total liquid inlet pipe, rises along the upper liquid pipe, and needs to overcome the influence of gravity to make deceleration movement in the process of rising along the upper liquid pipe; the rising speeds of the plurality of upper liquid pipes are close to each other, although the fluid speed changes in the process, the heat exchange is efficient due to the short distance and the large difference between the cooling liquid temperature and the ambient temperature, and the power source does not need to work;

[0017] Back cooling

[0018] The cooling liquid is dispersed to each descending return pipe through the arc-shaped connecting pipe, gravity does work at this time, the influence of gravity is utilized to make the cooling liquid accelerate, in order to avoid the incomplete heat exchange caused by the too fast flow speed of the cooling liquid at the tail end and the too short residual time, the dovetail type elbow pipe is arranged to resist the influence of gravity, four bends and two rising areas are formed through the dovetail type elbow pipe, so that the cooling liquid makes deceleration movement after accelerating to the inclined pipeline, at this time, the cooling liquid speed is converted from acceleration to deceleration, then acceleration, then deceleration, and then acceleration, so as to increase the residual time of the cooling liquid, since the flow path of the cooling liquid is shortened, the temperature difference between the cooling liquid and the environment is large at this time, therefore, the pipeline can improve the cooling speed, the heat exchange efficiency of each point is close, and the structure characteristics of the vest are met;

[0019] Compared with the prior art, the beneficial effects of the present application are:

[0020] The traditional S-shaped cooling pipeline is converted into a split type pipeline, so that the liquid makes deceleration movement at the initial stage, although the movement speed of the liquid is slow at this time, the temperature difference between the cooling liquid and the environment is the largest at this time, the heat exchange efficiency is high at this time, therefore, the cooling effect of the front area is not affected by the movement speed, when the cooling liquid crosses the shoulder to reach the back, the temperature of the cooling liquid is reduced after a round of cooling, but only one front body height is passed, therefore, the temperature change amount is much smaller than that of the S-shaped cooling pipe passing through one front body, and the cooling liquid accelerates at this time, the flow speed is increased in this stage, the use of the power source is reduced, the dovetail type elbow pipe is used for deceleration, the residence time is increased for continuous heat exchange, so that the circulation is realized, and the cooperation of the diameter-adjusting heat preservation execution bin and the elastic sealing membrane can not only heat preserve the cooling liquid flow pipeline, but also can only heat exchange the inside of the cooling pipe, improve the utilization efficiency, and can adjust the flow and the cooling speed. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0022] Figure 1 It is a front view schematic diagram of a cooling liquid distribution device of an air-conditioning vest;

[0023] Figure 2 It is a rear view schematic diagram of a cooling liquid distribution device of an air-conditioning vest;

[0024] Figure 3 It is an expanded schematic diagram of a cooling liquid distribution device of an air-conditioning vest;

[0025] Figure 4 It is a side view schematic diagram of a cooling liquid distribution device of an air-conditioning vest;

[0026] Figure 5 It is a sectional view schematic diagram of a cooling liquid flow pipeline in a cooling liquid distribution device of an air-conditioning vest;

[0027] Figure 6 It is Figure 5 It is a schematic diagram of a cooling liquid flow pipeline diameter adjustment by an elastic sealing film;

[0028] In the figure: 1, cooling liquid flow pipeline; 11, liquid inlet pipe; 12, arc-shaped connecting pipe; 13, shoulder transition pipe; 14, descending return pipe; 15, dovetail-shaped bending pipe; 151, arc-shaped transition pipe; 16, total liquid inlet pipe; 17, total liquid outlet pipe; 2, cooling liquid cooling system; 3, diameter adjustment control assembly; 31, micro air pump; 32, diameter adjustment air path; 33, gas valve; 4, anti-bending shoulder pipe; 41, bending slot; 42, buffer pad; 5, diameter adjustment heat preservation execution bin; 51, elastic sealing film. DETAILED DESCRIPTION

[0029] Please refer to Figures 1-6 The present application comprises:

[0030] The cooling liquid cooling system 2 further comprises a cooling liquid flow pipeline 1 in closed loop communication with the cooling liquid cooling system 2, and the cooling liquid flow pipeline 1 comprises a liquid inlet pipe 11, an arc-shaped connecting pipe 12, a shoulder transition pipe 13, a descending return pipe 14, a dovetail-shaped bending pipe 15, a total liquid inlet pipe 16, and a total liquid outlet pipe 17.

[0031] Firstly, the cooling liquid cooling system 2 mainly cools the liquid in the cooling liquid flow pipeline 1 located in the cooling position of the micro air conditioner through the micro air conditioner equipped with refrigerant, and then continues to deliver to the inside of the vest to realize temperature reduction circulation. In order to avoid the increase of kinetic energy loss of the liquid flowing in the pipeline due to the too high length of the pipeline, the pipeline needs to be segmented, and the long path circulation is changed into multiple short path circulations, so that the flow rate of the cooling liquid can be more conveniently controlled;

[0032] The total liquid inlet pipe 16, the liquid inlet pipe 11 and the arc-shaped connecting pipe 12 form a front split flow pipeline. The total liquid inlet pipe 16 is laid at the lowermost position of the front of the vest and is in communication with the water supply pipeline of the cooling liquid cooling system 2. The liquid inlet pipes 11 are horizontally and equidistantly distributed above the total liquid inlet pipe 16 and are in communication with each other. The upper end portions of the liquid inlet pipes 11 are all gathered below the shoulder portion of the front through the arc-shaped connecting pipe 12.

[0033] Firstly, the liquid inlet pipe 11, the arc-shaped connecting pipe 12 and the total liquid inlet pipe 16 form a front split flow pipeline. After the water supply pipe of the cooling liquid cooling system 2 is in communication with the total liquid inlet pipe 16, the water pump provides power for the cooling liquid. After the cooling liquid enters the inside of the total liquid inlet pipe 16, it rises along the liquid inlet pipes 11. In the process of rising along the liquid inlet pipes 11, the cooling liquid needs to overcome the influence of gravity and do deceleration movement. The rising speeds of the multiple liquid inlet pipes 11 are close to being consistent. Although the fluid speed changes in this process, the heat exchange is efficient due to the short distance and the large difference between the temperature of the cooling liquid and the ambient temperature. At this time, the power source does not need to do work.

[0034] The arc-shaped connecting pipe 12, the descending return pipe 14, the dovetail type bent pipe 15 and the total liquid outlet pipe 17 form a back split flow descending pipeline. The total liquid outlet pipe 17 is laid at the lowermost position of the back of the vest and is in communication with the water return pipeline of the cooling liquid cooling system 2. The descending return pipes 14 are horizontally and equidistantly distributed above the total liquid outlet pipe 17 and are in communication with each other. The upper end of the total liquid outlet pipe 17 is gathered below the shoulder portion of the back through the arc-shaped connecting pipe 12. The dovetail type bent pipe 15 is arranged at the middle portion of the descending return pipe 14. The dovetail type bent pipe 15 has four arc-shaped transition pipes 151 and two ascending pipe sections.

[0035] In this stage, the cooling liquid is dispersed to each descending return pipe 14 through the arc-shaped connecting pipe 12, at this time, the gravity works, the cooling liquid is accelerated by the gravity effect, in order to avoid the incomplete heat exchange caused by the too fast flow rate of the cooling liquid at the end and the too short residual time, therefore, the dovetail type bending pipe 15 is arranged to resist the gravity effect, the four bends are formed through the dovetail type bending pipe 15, two ascending areas are formed, the speed of the cooling liquid is reduced after the accelerated movement, at this time, the speed of the cooling liquid is converted from the initial acceleration to deceleration, re-acceleration, re-deceleration, and re-acceleration, thereby increasing the residual time of the cooling liquid, since the flow path of the cooling liquid is shortened, the temperature difference between the cooling liquid and the environment is large at this time, therefore, the pipeline can improve the cooling speed, at the same time, the heat exchange efficiency of each point is close, and the structure characteristics of the vest are met;

[0036] A plurality of shoulder transition pipes 13 are distributed on the shoulders of the vest, the two ends of the shoulder transition pipe 13 are respectively connected with the arc-shaped connecting pipe 12 on the front and the arc-shaped connecting pipe 12 on the back, forming a closed loop pipeline;

[0037] First, the front and rear pipeline layout is completed, and then the transition is performed through the shoulder transition pipe 13, at this time, the liquid after the upper liquid pipe 11 will be concentrated through the shoulder transition pipe 13 to transfer the liquid to the back, since the vest is a structure with an opening at the bottom and a connection at the top, therefore, the liquid flow of the pipeline can be met without changing the structure of the vest, and the use is met;

[0038] The cooling liquid flow pipeline 1 is provided with a diameter adjusting and heat preserving execution bin 5, the diameter adjusting and heat preserving execution bin 5 is arranged on the side of the inner wall of the cooling liquid flow pipeline 1 away from the body, the side of the diameter adjusting and heat preserving execution bin 5 close to the cavity of the cooling liquid flow pipeline 1 is an open surface, the open surface of the diameter adjusting and heat preserving execution bin 5 is closed by an elastic sealing film 51;

[0039] In order to adjust the liquid flow and adjust the heat exchange efficiency, therefore, the diameter adjusting and heat preserving execution bin 5 is arranged, the diameter adjusting and heat preserving execution bin 5 is mainly arranged on the inner wall of the cooling liquid flow pipeline 1, and is an open cavity, which is closed by the elastic sealing film 51, at this time, the diameter adjusting and heat preserving execution bin 5 is inflated, the elastic sealing film 51 is inflated, and the elastic sealing film 51 occupies the liquid flow space in the cooling liquid flow pipeline 1, thereby reducing the cross-sectional area, and further reducing the flow, so as to reduce the heat exchange efficiency, at the same time, the diameter adjusting and heat preserving execution bin 5 is arranged on the side of the inner wall of the cooling liquid flow pipeline 1 away from the inner surface of the vest, at this time, the diameter adjusting and heat preserving execution bin 5 can preserve the cooling liquid in the cooling liquid flow pipeline 1 by air, thereby avoiding the problem that the heat exchange efficiency is reduced due to the heat exchange between the cooling liquid and the air outside the vest;

[0040] The vest is provided with a diameter control assembly 3 for controlling the deformation of the elastic sealing film 51. The diameter control assembly 3 comprises a micro air pump 31, a diameter control gas path 32 and a gas valve 33. The output end of the micro air pump 31 is in communication with the diameter control gas path 32. The diameter control gas path 32 is in communication with the diameter control heat preservation execution chamber 5 in the upper liquid pipe 11. The gas valve 33 is arranged between the diameter control gas path 32 and the diameter control heat preservation execution chamber 5.

[0041] In order to adjust the diameter control heat preservation execution chamber 5, the diameter control assembly 3 is arranged. After the gas valve 33 is opened, the micro air pump 31 sends gas to the inside of the diameter control gas path 32. The gas enters the diameter control heat preservation execution chamber 5 through the diameter control gas path 32. The elastic sealing film 51 is affected by the gas pressure and expands. The cross-sectional area of the cooling liquid flow pipe 1 is affected. The cross-sectional area of the cooling liquid flow pipe 1 is reduced. The amount of cooling liquid flowing is reduced.

[0042] The plurality of downward return pipes 14 are divided into two groups with the center line of the vest as the center line. The dovetail type bent pipes 15 on the two groups of downward return pipes 14 are symmetrically distributed based on the center line. The dovetail type bent pipes 15 are located on one side of the downward return pipe 14 close to the center line.

[0043] Firstly, the dovetail type bent pipes 15 are arranged on the side of the downward return pipe 14 close to the center line because the edge of the vest often does not cover the body. The purpose is to change the flow direction of the cooling liquid. The whole flow pipe is in a central mode. The coverage rate of the center of the back is improved. The purpose of cooling is achieved.

[0044] The vest shoulder is provided with a plurality of anti-folding shoulder pipes 4 for accommodating the shoulder transition pipe 13. The anti-folding shoulder pipe 4 is composed of an elastic pipe. A plurality of bending grooves 41 are arranged on the elastic pipe for facilitating bending. The anti-folding shoulder pipe 4 is sleeved on the outside of the shoulder transition pipe 13. The bottom of the anti-folding shoulder pipe 4 is fixedly connected with a buffer pad layer 42 in contact with the shoulder.

[0045] Firstly, the shoulder transition pipe 13 is located on the shoulder. Because the thickness of different people is not consistent, when the thin user uses it, the shoulder is thin. At this time, the top of the shoulder is protruding. When the vest is worn on the body, the shoulder exerts force on the shoulder of the vest. The shoulder transition pipe 13 is easy to bend. The liquid flow is affected. At this time, the anti-folding shoulder pipe 4 is sleeved on the outside of the shoulder transition pipe 13. When the anti-folding shoulder pipe 4 is affected by the shoulder, the bending grooves 41 will bend. Because the anti-folding shoulder pipe 4 itself has a certain elasticity, the bending of the anti-folding shoulder pipe 4 is more uniform. The large corner is divided into multiple regions. The change is uniform. The circular arc shape is formed. The shoulder transition pipe 13 in the anti-folding shoulder pipe 4 is prevented from bending. The problem of liquid flow is not smooth. The wearing comfort is improved through the buffer pad layer 42.

[0046] The dovetail bending pipe 15 itself and the dovetail bending pipe 15 and the descending return pipe 14 have four bending points, and the four bending points are all smoothly transitioned through the arc transition pipe 151;

[0047] When the liquid flows to the lower side through the arc transition pipe 151, the transition is more smooth, and the kinetic energy loss is reduced;

[0048] When the shoulder transition pipe 13 is bent, the total liquid inlet pipe 16 is flush with the total liquid outlet pipe 17;

[0049] Since the total liquid inlet pipe 16 and the total liquid outlet pipe 17 need to be communicated with the external cooling liquid cooling system 2, the flush of the total liquid inlet pipe 16 and the total liquid outlet pipe 17 is more convenient for the communication with the pump delivery pipeline inside the external cooling liquid cooling system 2.

[0050] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical solution and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A device for distributing coolant fluid for an air-conditioned vest, comprising a coolant fluid cooling system (2), characterized in that: Cooling liquid flow pipeline (1) in closed loop communication with the cooling liquid cooling system (2), the cooling liquid flow pipeline (1) includes the upper liquid pipe (11), the arc connecting pipe (12), the shoulder transition pipe (13), the descending backflow pipe (14), the dovetail type bending pipe (15), the total liquid inlet pipe (16), the total liquid outlet pipe (17); The total liquid inlet pipe (16), the upper liquid pipe (11), the arc connecting pipe (12) constitute the front split pipeline, the total liquid inlet pipe (16) is laid on the lowest part of the front of the vest and communicated with the water supply pipeline of the cooling liquid cooling system (2), the upper liquid pipe (11) is horizontally equidistantly distributed on the upper part of the total liquid inlet pipe (16) and communicated with each other, the upper end of the upper liquid pipe (11) is converged under the front shoulder through the arc connecting pipe (12); The arc connecting pipe (12), the descending backflow pipe (14), the dovetail type bending pipe (15), the total liquid outlet pipe (17) constitute the back split descending pipeline, the total liquid outlet pipe (17) is laid on the directly below of the back of the vest and communicated with the backwater pipeline of the cooling liquid cooling system (2), the descending backflow pipe (14) is horizontally equidistantly distributed on the upper part of the total liquid outlet pipe (17) and communicated with each other, the upper end of the total liquid outlet pipe (17) is converged under the back shoulder through the arc connecting pipe (12), the dovetail type bending pipe (15) is arranged in the middle part of the descending backflow pipe (14), the dovetail type bending pipe (15) has four arc transition pipes (151) and two rising pipeline areas; A plurality of shoulder transition pipes (13) are distributed on the shoulder of the vest, the two ends of the shoulder transition pipe (13) are respectively communicated with the arc connecting pipe (12) of the front and the arc connecting pipe (12) of the back, forming a closed loop pipeline; The cooling liquid flow pipeline (1) is provided with a diameter adjusting and heat preserving execution bin (5), the diameter adjusting and heat preserving execution bin (5) is arranged on the side of the inner wall of the cooling liquid flow pipeline (1) away from the body, the side of the diameter adjusting and heat preserving execution bin (5) close to the cavity of the cooling liquid flow pipeline (1) is an open surface, the open surface of the diameter adjusting and heat preserving execution bin (5) is sealed by an elastic sealing film (51); The vest is provided with a diameter adjusting control assembly (3) for controlling the deformation of the elastic sealing film (51), the diameter adjusting control assembly (3) comprises a micro air pump (31), a diameter adjusting gas path (32) and a gas valve (33), the output end of the micro air pump (31) is communicated with the diameter adjusting gas path (32), the diameter adjusting gas path (32) is communicated with the diameter adjusting and heat preserving execution bin (5) in the upper liquid pipe (11), and the gas valve (33) is arranged between the diameter adjusting gas path (32) and the diameter adjusting and heat preserving execution bin (5).

2. A back cooling liquid flow dividing device for an air conditioner according to claim 1, characterized in that: A plurality of descending backflow pipes (14) are divided into two groups with the center line of the vest as the center line, the dovetail type bending pipes (15) on the two groups of descending backflow pipes (14) are symmetrically distributed based on the center line, and the dovetail type bending pipe (15) is located on one side of the descending backflow pipe (14) close to the center line.

3. A back cooling liquid flow dividing device for an air conditioner according to claim 1, characterized in that: The shoulder part of the vest is provided with a plurality of anti-folding shoulder pipes (4) for accommodating the shoulder transition pipe (13), the anti-folding shoulder pipe (4) is composed of an elastic pipe, a plurality of bending grooves (41) are formed on the elastic pipe to facilitate bending, the anti-folding shoulder pipe (4) is sleeved outside the shoulder transition pipe (13), and a buffer pad layer (42) in contact with the shoulder is fixedly connected to the bottom of the anti-folding shoulder pipe (4).

4. The apparatus of claim 1 wherein: The dovetail type bending pipe (15) itself and the dovetail type bending pipe (15) and the descending backflow pipe (14) have four bending points, and the four bending points are smoothly transitioned through arc transition pipes (151).

5. The apparatus of claim 1 wherein: When the shoulder transition pipe (13) is bent, the total liquid inlet pipe (16) is flush with the total liquid outlet pipe (17).

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