CN112964096A

CN112964096A - Anti-freezing type sleeve heat exchanger

Info

Publication number: CN112964096A
Application number: CN202110186089.5A
Authority: CN
Inventors: 姜黎平
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-15
Filing date: 2021-02-15
Publication date: 2021-06-15

Abstract

The invention discloses an anti-freezing type sleeve heat exchanger, belonging to the technical field of heat exchangers, an inner refrigerant pipe is arranged in an outer sleeve, the outer sleeve and the inner refrigerant pipe are arranged into a mutually matched serpentine coil pipe-shaped structure, a plurality of inner pipes are introduced with refrigerants, flow gaps are arranged among the inner pipes for hot water flow circulation in the outer sleeve, compared with the prior art that one inner pipe is adopted for refrigerant introduction, the heat exchange area is effectively increased, the hot water flow introduced into the outer sleeve can be in full flow contact with the inner pipes, the heat exchange efficiency is effectively improved, meanwhile, an outer inlet pipe for discharging backflow accumulated water is arranged at the bottom end part of the outer sleeve, when the heat exchanger is in a non-working state, an electromagnet on an outer end enclosure is used for carrying out magnetic attraction movement on a magnetic piston, at the moment, negative pressure is formed in the outer sleeve so that the accumulated water at the bottom of the outer sleeve is sucked into the outer inlet pipe, and the water flow is discharged outwards through the return pipe, so that the problem that the water flow at the bottom of the heat exchanger cannot be completely discharged is effectively solved.

Description

Anti-freezing type sleeve heat exchanger

Technical Field

The invention relates to the technical field of heat exchangers, in particular to an anti-freezing type sleeve heat exchanger.

Background

The double-pipe heat exchanger is a common heat exchange device and is widely applied to refrigeration equipment. The double-pipe heat exchanger is a concentric sleeve formed by connecting two standard pipes with different sizes, namely, the double-pipe heat exchanger is composed of a refrigerant pipe and a sleeve pipe, the refrigerant pipe is arranged in the sleeve pipe, a refrigerant is introduced into the refrigerant pipe, water flow is introduced between the refrigerant pipe and the sleeve pipe, the sleeve pipe and the refrigerant pipe are wound into a coil shape, and the sleeve pipe and the refrigerant pipe conduct heat exchange through the refrigerant pipe.

In winter or colder area, the temperature drops to below zero, and the unable complete discharge of sleeve pipe heat exchanger bottom rivers after the unit shuts down often can lead to the inner tube of sleeve pipe heat exchanger to break because the ponding that flows back freezes, can directly lead to refrigerant and rivers to mix after the inner tube breaks, and the unit can not normal operating.

Therefore, an anti-freezing sleeve heat exchanger is provided to effectively solve the problems in the prior art.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide an anti-freezing double-pipe heat exchanger, an inner refrigerant pipe is arranged in an outer sleeve, the outer sleeve and the inner refrigerant pipe are arranged into a serpentine coil pipe-shaped structure which is matched with each other, a plurality of inner pipes are introduced with refrigerants, flow gaps are arranged among the inner pipes for hot water flow circulation in the outer sleeve, compared with the prior art that one inner pipe is adopted for refrigerant introduction, the heat exchange area is effectively increased, the hot water flow introduced into the outer sleeve can be in full flow contact with the inner pipes, the heat exchange efficiency is effectively improved, meanwhile, an outer inlet pipe for discharging backflow accumulated water is arranged at the bottom end part of the outer sleeve, when the heat exchanger is in a non-working state, an electromagnet on an outer end enclosure is used for performing magnetic attraction movement on a magnetic piston, and at the moment, negative pressure is formed in the outer inlet pipe to ensure that the accumulated water at the bottom of the outer sleeve is sucked into the outer, and the water flow is discharged outwards through the return pipe, so that the problem that the water flow at the bottom of the heat exchanger cannot be completely discharged is effectively solved.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

An anti-freezing type sleeve heat exchanger comprises an outer sleeve and an inner cooling medium pipe sleeved inside the outer sleeve, wherein the outer sleeve and the inner cooling medium pipe are wound to form a serpentine coil-shaped structure matched with each other, the inner cooling medium pipe is formed by stacking a plurality of inner pipe rings, a flow gap is reserved between the inner pipes, a plurality of elastic hoses are sleeved on the outer end wall of the inner cooling medium pipe, the upper end and the lower end of the inner cooling medium pipe respectively penetrate through the two elastic hoses arranged up and down, the upper end and the lower end of the inner cooling medium pipe are respectively provided with a cooling medium source leading-in pipe and a cooling medium source leading-out pipe, the lower end of the outer sleeve is fixedly provided with an outer inlet pipe, the outer end of the cooling medium source leading-in pipe penetrates through the side wall of one end of the outer inlet pipe and extends outwards, the side wall of one end of the outer inlet pipe close to the outer sleeve is connected with a cooling medium inlet pipe, the top end of, the lower tip of going out the pipe and being close to one side of outer tube is equipped with the outlet pipe, it sets up to install backward flow adsorbent to go into outside the inside of pipe one side of keeping away from the inlet tube, the bottom portion that goes into the pipe outside is connected with the back flow corresponding with backward flow adsorbent position.

Furthermore, a plurality of inner tube outsides are located to the elastic hose closely cover, and is a plurality of it has graphite heat conduction particle bag to distribute on the inner tube lateral wall, and the outer end of elastic hose inlays mutually with the inner wall of outer tube and establishes the linking, utilizes elastic hose to tie a plurality of inner tubes, plays limiting displacement to a plurality of inner tubes, and simultaneously, elastic hose and outer tube inner wall counterbalance are inlayed and are established, form a heat exchange space between interior refrigerant pipe and the outer tube.

Furthermore, the elastic hose is a hollow annular rubber ring, the inner end wall of the elastic hose is coated with a layer of flexible pad, a buffer cavity is formed in the elastic hose, and a plurality of elastic particles are filled in the buffer cavity, so that the inner refrigerant pipe and the elastic hose are protected.

Furthermore, the upper end and the lower end of the plurality of inner tubes are respectively connected with a refrigerant source lead-in pipe and a refrigerant source delivery pipe, and the refrigerant source lead-in pipe and the refrigerant source delivery pipe are both made of soft materials.

Furthermore, the outer end wall of the outer sleeve is coated with the heat-insulating pipe, an anti-freezing layer is filled between the heat-insulating pipe and the outer wall of the outer sleeve, the anti-freezing layer comprises glass fibers coated on the inner end wall of the heat-insulating pipe, and microcrystalline glass granules are sprayed on the glass fibers, so that the heat-insulating strength of the inner part of the outer sleeve is effectively improved, and the outer sleeve is effectively prevented from being excessively influenced by the external low-temperature environment.

Furthermore, the backflow adsorption body comprises an outer seal head fixedly connected with the outer end of the outer inlet pipe, an electromagnet is embedded in the outer seal head, the inner part of the outer inlet pipe is movably connected with a magnetic piston, the inner part of the magnetic piston is filled with a magnetic suction filling layer which is arranged in a magnetic suction way with an electromagnet, one end of the magnetic piston close to the outer seal head is connected with the inner wall of the outer seal head through a plurality of strong compression return springs, when the double-pipe heat exchanger is normally used, the magnetic piston is propped against the position of the limit ring under the elastic action of the strong compression return spring, hot water led in from the water inlet pipe is led into the outer sleeve, when the double-pipe heat exchanger is stopped, the electromagnet is started, the magnetic piston is attracted outwards, so that a certain negative pressure state is formed inside the outer inlet pipe, and the reserved water at the bottom of the outer sleeve pipe is drained to the outer side wall of the outer inlet pipe and is discharged through the return pipe.

Furthermore, the outer pipe that advances is close to the inboard fixedly connected with spacing ring of one end of inlet tube, the bottom portion of advancing the pipe outward has seted up the drainage chamber, it is located between inlet tube and the back flow to advance the pipe outward.

Furthermore, the bottom end part of the external inlet pipe is provided with a backflow hole corresponding to the position of the backflow pipe, the bottom end part of the external inlet pipe is embedded with an arc-shaped backflow box communicated with the backflow hole, and the backflow pipe is connected to the bottom end part of the arc-shaped backflow box.

Furthermore, the drainage chamber is internally embedded with an anti-freezing filter layer which is double-layer filter cotton, and the inner side of the double-layer filter cotton is filled with an anti-freezing particle bag.

Further, granule bag prevents frostbite is including inlaying the water-soluble cyst of locating in the double-deck filter pulp, the inside packing of water-soluble cyst has the powder of preventing frostbite, when this double-pipe heat exchanger is under non service environment, the electromagnet circular telegram for it is outwards inhaled the motion by magnetism to attach the magnetic piston, make and advance intraduct outside and form certain negative pressure state, the water of reserving of outer sleeve pipe bottom department moves to arc backward flow case one side because of the negative pressure that advances in the outer sleeve pipe, and derive through the drainage chamber, set up in the frostproofing filtering layer of drainage chamber department and be used for filtering out to the backward flow water, at the in-process that filters out, the powder of preventing frostbite is dissolved in water, be difficult for causing moisture to freeze and influence the.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the scheme effectively increases the heat exchange area by arranging the inner refrigerant pipe in the outer sleeve pipe, arranging the outer sleeve pipe and the inner refrigerant pipe into the serpentine coil pipe-shaped structure which is matched with each other, leading the refrigerants into the inner pipes, and arranging the flow gaps among the inner pipes for hot water flow circulation in the outer sleeve pipe, compared with the prior art which adopts one inner pipe for refrigerant leading-in, the hot water flow led into the outer sleeve pipe can fully flow and contact with the inner pipes, effectively improves the heat exchange efficiency, simultaneously, an outer inlet pipe for discharging the backflow accumulated water is arranged at the bottom end part of the outer sleeve, when the heat exchanger is in a non-working state, the electromagnet on the outer end enclosure is used for carrying out magnetic attraction movement on the magnetic piston, at the moment, negative pressure is formed inside the outer inlet pipe to suck the water at the bottom of the outer sleeve pipe into the outer inlet pipe, and the water flow is discharged outwards through the return pipe, so that the problem that the water flow at the bottom of the heat exchanger cannot be completely discharged is effectively solved.

(2) A plurality of inner tube outsides are located to the inseparable cover of elastic hose, it has graphite heat conduction particle bag to distribute on a plurality of inner tube lateral walls, and elastic hose's outer end inlays mutually with the inner wall of outer tube and establishes the linking, utilize elastic hose to tie a plurality of inner tubes, play limiting displacement to a plurality of inner tubes, and simultaneously, elastic hose and outer tube inner wall counterbalance are inlayed and are established, form a heat exchange space between interior refrigerant pipe and the outer tube, graphite heat conduction particle bag is favorable to improving the heat transfer in this heat exchange space, elastic hose is cavity annular rubber circle, the flexible pad of cladding one deck on elastic hose's the inner end wall, the cushion chamber has been seted up to elastic hose's inside, the inside packing in cushion chamber has a plurality of elastic particles, be favorable to playing the guard action to linking department mutually.

(3) The upper and lower ends of the inner pipes are respectively connected with a refrigerant source leading-in pipe and a refrigerant source leading-out pipe, and the refrigerant source leading-in pipe and the refrigerant source leading-out pipe are both made of soft materials so as to facilitate the leading-in and leading-out of a cold source.

(4) Cladding one deck insulating tube on the outer end wall of outer tube, it has anti-freezing layer to fill between insulating tube and the outer wall of outer tube, and anti-freezing layer is including cladding the glass fiber on the inner end wall of insulating tube, and it has microcrystalline glass granule to spout to cover on the glass fiber, and microcrystalline glass granule has low heat conductivity, and cooperation glass fiber effectively improves the heat preservation intensity to the inside of outer tube, effectively avoids the outer tube excessively to receive external low temperature environment's influence.

(5) The reflux adsorption body comprises an outer sealing head fixedly connected to the outer end of an outer inlet pipe, an electromagnet is embedded in the outer sealing head, an attached magnetic piston is movably connected in the outer inlet pipe, a magnetic attraction filling layer magnetically attracted with the electromagnet is filled in the attached magnetic piston, one end, close to the outer sealing head, of the attached magnetic piston is connected with the inner wall of the outer sealing head through a plurality of powerful compression reset springs, when the sleeve heat exchanger is normally used, the attached magnetic piston abuts against and is buckled at a limiting ring under the elastic action of the powerful compression reset springs, hot water led in from a water inlet pipe is led into the outer sleeve, when the sleeve heat exchanger is stopped to be used, the electromagnet is started, the attached magnetic piston is magnetically attracted outwards to move, a certain negative pressure state is formed in the outer inlet pipe, and water reserved at the bottom of the outer sleeve is drained to the outer side wall of the outer inlet pipe and is discharged through a return pipe.

(6) Advance the inboard fixedly connected with spacing ring of one end that the pipe is close to the inlet tube outward, the drainage chamber has been seted up to the bottom portion of advancing the pipe outward, it is located between inlet tube and the back flow to advance the pipe outward, the corresponding backward flow hole with the back flow position is seted up to the bottom portion of advancing the pipe outward, the bottom portion of advancing the pipe outward inlays to establish installs the arc backward flow case that is linked together with the backward flow hole, the back flow is connected in the bottom portion of arc backward flow case, the arc backward flow case is used for playing interim back to the ponding of surviving of deriving, derive through the.

(7) The inside of drainage chamber is inlayed and is equipped with the filtering layer that prevents frostbite, the filtering layer that prevents frostbite is double-deck filter cotton, double-deck filter cotton's inboard packing has the granule bag that prevents frostbite, the granule bag that prevents frostbite is including inlaying the water-soluble cyst of locating in the double-deck filter cotton, the inside packing of water-soluble cyst has the powder that prevents frostbite, when this double-pipe heat exchanger is under non-service environment, the electromagnet circular telegram, make attach the magnetic piston by outside magnetism suction motion, make and advance the inside certain negative pressure state that forms of pipe outward, the water of reserving of outer sleeve pipe bottom department moves to arc backward flow case one side because of the negative pressure in advancing outward, and derive through the drainage chamber, the filtering layer that prevents frostbite that sets up in drainage chamber department is used for filtering out to the backward flow, at the in-process.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a perspective view of the present invention at the location of the internal coolant tube;

FIG. 4 is an internal cross-sectional view of the present invention at the point of external access;

FIG. 5 is an external view of the external inlet tube of the present invention;

fig. 6 is a partial schematic view of the junction of the inner coolant tube and the flexible hose of the present invention.

FIG. 7 is an internal cross-sectional view of the present invention with an anti-freeze filter added to the drainage lumens of the outer inlet and outlet tubes.

The reference numbers in the figures illustrate:

the device comprises an outer sleeve 1, an inner refrigerant pipe 2, an elastic hose 3, a refrigerant source lead-in pipe 4, a refrigerant source lead-out pipe 5, an outer inlet pipe 6, an inlet pipe 7, an outer outlet pipe 8, a water outlet pipe 9, an outer seal head 10, an arc-shaped return box 11, a return pipe 12, an electromagnet 13, an attached magnetic piston 14, a strong compression return spring 15, a limiting ring 16 and an anti-freezing filter layer 17.

Detailed Description

The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-3, an anti-freezing sleeve heat exchanger comprises an outer sleeve 1 and an inner cooling medium tube 2 sleeved inside the outer sleeve 1, wherein the outer sleeve 1 and the inner cooling medium tube 2 are wound to form a serpentine coil-shaped structure matching with each other, the inner cooling medium tube 2 is formed by stacking a plurality of inner tubes in an annular layer, a flow gap exists between the inner tubes, a plurality of elastic hoses 3 are sleeved on the outer end wall of the inner cooling medium tube 2, the upper and lower ends of the inner cooling medium tube 2 respectively penetrate through the two elastic hoses 3 arranged up and down, the elastic hoses 3 are tightly sleeved outside the inner tubes, graphite heat-conducting particle bags are distributed on the outer side walls of the inner tubes, the outer ends of the elastic hoses 3 are embedded and connected with the inner wall of the outer sleeve 1, the inner tubes are bound by the elastic hoses 3 to limit the inner tubes, and the elastic hoses 3 are abutted and embedded with the inner wall of the outer sleeve 1, interior refrigerant pipe 2 and outer tube 1 between form a heat exchange space, graphite heat conduction particle bag is favorable to improving the heat transfer in this heat exchange space, and a plurality of inner tubes let in the refrigerant, are equipped with the flow clearance between a plurality of inner tubes, adopt an inner tube to carry out the refrigerant and let in as prior art relatively, have increased heat exchange area undoubtedly, and the leading-in hot water can fully and a plurality of inner tube phase flow contact in to outer tube 1 effectively improves heat exchange efficiency.

Elastic hose 3 is cavity annular rubber circle, and the flexible pad of cladding one deck on elastic hose 3's the inner end wall, and the cushion chamber has been seted up to elastic hose 3's inside, and the inside packing of cushion chamber has a plurality of elastic particles, is favorable to playing the guard action to linking up the department mutually with elastic hose 3 to internal refrigerant pipe 2.

The upper and lower ends of the inner refrigerant pipe 2 are respectively provided with a refrigerant source leading-in pipe 4 and a refrigerant source leading-out pipe 5, the upper and lower ends of the plurality of inner pipes are respectively connected with the refrigerant source leading-in pipe 4, the refrigerant source eduction tube 5 is connected, the refrigerant source leading-in tube 4 and the refrigerant source eduction tube 5 are both made of soft materials, leading-in and leading-out of refrigerants are achieved, an outer inlet tube 6 is fixedly mounted at the lower end of the outer sleeve 1, the outer end of the refrigerant source leading-in tube 4 penetrates through the side wall of one end of the outer inlet tube 6 and extends outwards, a water inlet tube 7 is connected onto the side wall of one end, close to the outer sleeve 1, of the outer inlet tube 6, an outer outlet tube 8 is fixedly mounted at the top end of the outer sleeve 1, the outer end of the refrigerant source eduction tube 5 extends to the outer end of the outer outlet tube 8, a water outlet tube 9 is arranged at the lower end of one side, close to the outer sleeve 1, of the outer inlet tube 6, a backflow adsorbing body is mounted inside one side.

Referring to fig. 1-2 and 4-5, the backflow absorbing body includes an outer sealing head 10 fixedly connected to an outer end of an outer inlet pipe 6, an electromagnet 13 is embedded in the outer sealing head 10, an attached magnetic piston 14 is movably connected to the inner portion of the outer inlet pipe 6, a magnetic suction filling layer magnetically attracted to the electromagnet 13 is filled in the attached magnetic piston 14, one end of the attached magnetic piston 14 close to the outer sealing head 10 is connected to an inner wall of the outer sealing head 10 through a plurality of strong compression return springs 15, a limit ring 16 is fixedly connected to an inner side of one end of the outer inlet pipe 6 close to a water inlet pipe 7, a drainage cavity is opened at a bottom end portion of the outer inlet pipe 6, the outer inlet pipe 6 is located between the water inlet pipe 7 and a return pipe 12, when the double-pipe heat exchanger is normally used, the attached magnetic piston 14 is pressed against the limit ring 16 under an elastic action of the strong compression return springs 15, hot water introduced from the water inlet pipe, when the double-pipe heat exchanger is stopped in use, the electromagnet 13 is started, the magnetism attaching piston 14 is magnetically attracted outwards, a certain negative pressure state is formed inside the external inlet pipe 6, and the reserved water at the bottom of the external pipe 1 is drained to the outer side wall of the external inlet pipe 6 and is drained through the return pipe 12.

The bottom portion of advancing pipe 6 outward has seted up the backward flow hole corresponding with back flow 12 positions, advances the bottom portion of pipe 6 outward and inlays to establish and install the arc backward flow case 11 that is linked together with the backward flow hole, and back flow 12 is connected in the bottom portion of arc backward flow case 11, advances the inside ponding of staying of pipe 6 outward and can export to drainage chamber one side comparatively completely through the backward flow hole.

Please refer to fig. 7, it should be added that an anti-freezing filter layer 17 is embedded inside the drainage cavity, the anti-freezing filter layer 17 is a double-layer filter cotton, an anti-freezing particle bag is filled inside the double-layer filter cotton, the anti-freezing particle bag comprises a water-soluble bag embedded inside the double-layer filter cotton, and an anti-freezing powder is filled inside the water-soluble bag.

Cladding one deck insulating tube on the outer end wall of outer tube 1, it has anti-freezing layer to fill between insulating tube and the outer wall of outer tube 1, and anti-freezing layer is including cladding the glass fiber on the inner end wall of insulating tube, and it has microcrystalline glass granule to spout the cladding on the glass fiber, effectively improves the heat preservation intensity to outer 1 inside of tubes, effectively avoids outer tube 1 to excessively receive external low temperature environment's influence, improves the freezing resistance of outer tube 1 itself.

Compared with the prior art in which the inner refrigerant pipe 2 is arranged in the outer sleeve 1, the outer sleeve 1 and the inner refrigerant pipe 2 are in a serpentine coil-shaped structure which is matched with each other, the inner pipes are filled with the refrigerant, and flow gaps are arranged among the inner pipes, the heat exchange area is effectively increased by only using one inner pipe to fill the refrigerant in the prior art, hot water led into the outer sleeve 1 can be in full flow contact with the inner pipes, so that the heat exchange efficiency is effectively improved, meanwhile, the outer inlet pipe 6 for discharging backflow accumulated water is arranged at the bottom end part of the outer sleeve 1, when the heat exchanger is in a non-working state, the electromagnet 13 on the outer end enclosure 10 is used for playing a magnetic attraction role on the magnetic piston 14, at the moment, negative pressure is formed inside the outer inlet pipe 6 to adsorb the accumulated water at the bottom part of the outer sleeve 1, so that the accumulated water at the bottom part of the outer sleeve 1 is discharged through the return pipe 12, effectively solves the problem that the water flow at the bottom of the heat exchanger can not be completely discharged.

It should be emphasized here that the relative positions of the drainage cavity, the arc-shaped return tank 11 and the limiting ring 16 are set according to the actual environment to ensure that the accumulated water inside the outward pipe 6 can be drawn out and discharged through the drainage cavity after the magnetic piston 14 moves outside the outward pipe 6, after the electromagnet 13 is switched off, the magnetic piston 14 moves to one side of the limiting ring 16 under the action of a plurality of strong compression return springs, meanwhile, a magnetic attraction layer playing a magnetic attraction role on the magnetic piston 14 can be embedded on the end wall of the limiting ring 1, after the electromagnet 13 is switched off, the limiting ring 16 plays a role in attracting the magnetic piston 14, the magnetic attraction force of the electromagnet 13 is much greater than that of the magnetic attraction layer, and after the limiting ring 16 is connected with the magnetic piston 14, the engagement force is greater than the water pressure led out from the water inlet pipe 7.

The components used in the present invention are all standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experiments.

The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.

Claims

1. The utility model provides an antifreeze type sleeve heat exchanger, includes that outer tube (1) and cover locate inside interior refrigerant pipe (2) of outer tube (1), its characterized in that: the outer sleeve (1) and the inner cooling medium pipe (2) are wound to form a mutually matched serpentine coil-shaped structure, the inner cooling medium pipe (2) is formed by stacking a plurality of inner pipes in an annular layer, a flowing gap is reserved between the inner pipes, a plurality of elastic hoses (3) are sleeved on the outer end wall of the inner cooling medium pipe (2), the upper end and the lower end of the inner cooling medium pipe (2) respectively penetrate through the two elastic hoses (3) arranged up and down, the upper end and the lower end of the inner cooling medium pipe (2) are respectively provided with a cooling medium source lead-in pipe (4) and a cooling medium source lead-out pipe (5), the lower end of the outer sleeve (1) is fixedly provided with an outer inlet pipe (6), the outer end of the cooling medium source lead-in pipe (4) penetrates through the side wall of one end of the outer inlet pipe (6) and extends outwards, and the side wall of one end, close to the outer sleeve (1), of the outer inlet, the utility model discloses a backflow adsorption device, including outer tube (1), coolant source eduction tube (5), outer exit tube (8), the tip is equipped with outlet pipe (9) under one side that outer tube (8) are close to outer tube (1), advance outside pipe (6) and keep away from one side inside the inlaying of inlet tube (7) and install backward flow adsorbent, the bottom portion of advancing outside pipe (6) is connected with back flow (12) corresponding with backward flow adsorbent position.

2. The antifreeze type shell and tube heat exchanger as set forth in claim 1, wherein: the elastic hose (3) is tightly sleeved outside the inner pipes, the outer side walls of the inner pipes are distributed with graphite heat-conducting particle bags, and the outer ends of the elastic hose (3) are embedded with the inner wall of the outer sleeve (1) to be connected.

3. The antifreeze type shell and tube heat exchanger as set forth in claim 2, wherein: the elastic hose (3) is a hollow annular rubber ring, a layer of flexible pad is coated on the inner end wall of the elastic hose (3), a buffer cavity is formed in the elastic hose (3), and a plurality of elastic particles are filled in the buffer cavity.

4. The antifreeze type shell and tube heat exchanger as set forth in claim 1, wherein: the upper end and the lower end of the inner pipes are respectively connected with a refrigerant source lead-in pipe (4) and a refrigerant source lead-out pipe (5), and the refrigerant source lead-in pipe (4) and the refrigerant source lead-out pipe (5) are both made of soft materials.

5. The antifreeze type shell and tube heat exchanger as set forth in claim 1, wherein: the outer wall of the sleeve (1) is coated with a layer of heat preservation pipe, an anti-freezing layer is filled between the heat preservation pipe and the outer wall of the outer sleeve (1), the anti-freezing layer comprises glass fibers coated on the inner wall of the heat preservation pipe, and microcrystalline glass granules are sprayed on the glass fibers.

6. The antifreeze type shell and tube heat exchanger as set forth in claim 1, wherein: the backflow adsorption body comprises an outer end enclosure (10) fixedly connected to the outer end of an outer inlet pipe (6), an electromagnet (13) is embedded in the outer end enclosure (10), an attached magnetic piston (14) is movably connected to the inside of the outer inlet pipe (6), a magnetic attraction filling layer arranged with the electromagnet (13) in a magnetic attraction mode is filled in the inner portion of the attached magnetic piston (14), and one end, close to the outer end enclosure (10), of the attached magnetic piston (14) is connected with the inner wall of the outer end enclosure (10) through a plurality of powerful compression reset springs (15).

7. The antifreeze type shell and tube heat exchanger as set forth in claim 6, wherein: go into outside pipe (6) and be close to the inboard fixedly connected with spacing ring (16) of one end of inlet tube (7), the drainage chamber has been seted up to the bottom portion of advancing pipe (6) outward, it is located between inlet tube (7) and back flow (12) to advance pipe (6) outward.

8. The antifreeze type shell and tube heat exchanger as set forth in claim 7, wherein: the backflow device is characterized in that a backflow hole corresponding to the position of the backflow pipe (12) is formed in the bottom end portion of the outer inlet pipe (6), an arc-shaped backflow box (11) communicated with the backflow hole is installed in an embedded mode in the bottom end portion of the outer inlet pipe (6), and the backflow pipe (12) is connected to the bottom end portion of the arc-shaped backflow box (11).

9. The antifreeze type shell and tube heat exchanger as set forth in claim 8, wherein: the drainage cavity is internally embedded with an anti-freezing filter layer (17), the anti-freezing filter layer (17) is double-layer filter cotton, and the inner side of the double-layer filter cotton is filled with an anti-freezing particle bag.

10. The antifreeze type shell and tube heat exchanger as set forth in claim 9, wherein: the anti-freezing particle bag comprises a water-soluble bag embedded in the double-layer filter cotton, and anti-freezing powder is filled in the water-soluble bag.