CN116007191A

CN116007191A - Gas heating device

Info

Publication number: CN116007191A
Application number: CN202310004155.1A
Authority: CN
Inventors: 王维民; 杨鑫剑
Original assignee: Beijing University of Chemical Technology
Current assignee: Beijing University of Chemical Technology
Priority date: 2023-01-03
Filing date: 2023-01-03
Publication date: 2023-04-25

Abstract

The invention provides a gas heating device, and relates to the technical field of gas heating. The gas heating device comprises an air inlet end cover, a main body and an air outlet end cover; the air inlet end cover and the air outlet end cover are respectively arranged at two ends of the main body; the main body is internally provided with a plurality of spiral flow channels, the air inlet end cover is provided with a first steering groove, the air outlet end cover is provided with a second steering groove, the first steering groove is communicated with the same end of at least two spiral flow channels, and the second steering groove is communicated with the first steering groove through the spiral flow channels and is also communicated with one end of at least one other spiral flow channel. The gas heating device can remarkably increase the residence time of gas, and the heat exchange area between the gas and the gas flow passage can be effectively increased by the spiral flow passage, so that the heating effect of the gas heating device on the gas is improved, and the heating efficiency is improved.

Description

Gas heating device

Technical Field

The invention relates to the technical field of gas heating, in particular to a gas heating device.

Background

The gas heating device is a device for heating a gas flow, and the working principle of the gas heating device is that after the gas is introduced into a gas flow passage, the inner wall of the gas flow passage transfers heat to the gas, so that the gas is heated. However, most of the gas flow passages in the conventional gas heating apparatuses are unidirectional cylindrical gas flow passages; the residence time of the gas in the gas flow passage is short, and the heat exchange area between the inner wall of the cylindrical gas flow passage and the gas is small, thereby affecting the heating efficiency of the gas heating device on the gas.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a gas heating device.

The invention provides the following technical scheme:

a gas heating device, comprising an air inlet end cover, a main body and an air outlet end cover; the air inlet end cover and the air outlet end cover are respectively arranged at two ends of the main body; the novel air inlet device comprises a main body, and is characterized in that a plurality of spiral runners are arranged in the main body, a first steering groove is arranged on the air inlet end cover, a second steering groove is arranged on the air outlet end cover, the first steering groove is communicated with at least two identical ends of the spiral runners, and the second steering groove is communicated with one end of one other spiral runner while the first steering groove is communicated with the spiral runners.

In one possible embodiment, the two ends of the main body are respectively provided with a first protruding part and a second protruding part; the flow channel inlet and the flow channel outlet of the spiral flow channel are respectively arranged on the first bulge and the second bulge; the air inlet end cover is provided with a first containing cavity corresponding to the first protruding part, and the first steering groove is formed in the inner wall of the first containing cavity; the air outlet end cover is provided with a second containing cavity corresponding to the second protruding part, and the second steering groove is formed in the inner wall of the second containing cavity.

In one possible embodiment, the first diverting groove is provided on a first contact surface of the first chamber; a first boss is arranged on the second contact surface of the first protruding part, and the runner inlet is formed in the first boss; the first contact surface is propped against the second contact surface, and the first boss is arranged in the first steering groove; a second boss is arranged on the third contact surface of the second bulge, and the runner outlet is arranged on the second boss; the second steering groove is formed in a fourth contact surface of the second accommodating cavity; the third contact surface is propped against the fourth contact surface, and the second boss is arranged in the second steering groove.

In one possible implementation manner, the first contact surface is provided with a plurality of first steering grooves, the second contact surface is provided with a plurality of first bosses, and the first bosses are respectively arranged in the corresponding first steering grooves; the fourth contact surface is provided with a plurality of second steering grooves, the third contact surface is provided with a plurality of second bosses, and the second bosses are respectively arranged in the corresponding second steering grooves.

In one possible implementation manner, the first boss is provided with a plurality of runner inlets, and the second boss is provided with a plurality of runner outlets.

In one possible implementation manner, the extending directions of the plurality of spiral flow channels are all axial directions of the main body, the opening shape of the flow channel inlet on the first boss is spiral, and the opening shape of the flow channel outlet on the second boss corresponds to the shape of the flow channel inlet.

In one possible embodiment, the main body includes a first heat conduction cylinder and a second heat conduction cylinder, the second heat conduction cylinder being provided inside the first heat conduction cylinder; the first heat conduction cylinder and the second heat conduction cylinder are respectively provided with the spiral flow passage; the heat conductivity of the first heat conduction cylinder is larger than that of the second heat conduction cylinder.

In one possible embodiment, the gas heating device further comprises a seal disposed between the gas inlet end cap and the body, and between the gas outlet end cap and the body.

In one possible embodiment, the seal comprises a first seal and a second seal; the air inlet end cover is provided with a first sealing groove, one end of the main body, which is far away from the air outlet end cover, is provided with a second sealing groove, and the first sealing piece is arranged between the first sealing groove and the second sealing groove; the main part is kept away from the one end of air inlet end cover is equipped with the third seal groove, set up the fourth seal groove on the air outlet end cover, the second sealing member is located the third seal groove with between the fourth seal groove.

In one possible embodiment, the gas heating device further comprises a first connector, a gas inlet pipe, a second connector and a gas outlet pipe; the first connecting piece is connected with the air inlet end cover through the air inlet pipe, and the second connecting piece is connected with the air outlet end cover through the air outlet pipe.

Compared with the prior art, the invention has the beneficial effects that:

according to the gas heating device provided by the embodiment of the application, the plurality of spiral flow channels are arranged in the main body, so that gas can exchange heat with the inner wall of the spiral flow channels, and the temperature of the gas is raised; the air inlet end cover can inject air into one spiral flow channel so that the air flows into the second steering groove on the air outlet end cover; the second diversion trench is communicated with the same end of at least two spiral flow channels, and after the flowing direction of the gas is changed in the second diversion trench, the gas can flow into the first diversion trench on the air inlet end cover through other spiral flow channels communicated with the second diversion trench; the first steering groove is at least communicated with one end of the other spiral flow channel, and after the flowing direction of the gas is changed in the first steering groove, the gas flows towards the second steering groove again; in this way, the circulation is carried out until the gas is discharged outwards through the gas outlet end cap. The gas heating device can remarkably increase the residence time of gas, and the heat exchange area between the gas and the gas flow passage can be effectively increased by the spiral flow passage, so that the heating effect of the gas heating device on the gas is improved, and the heating efficiency is improved.

In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows an exploded view of a gas heating device according to an embodiment of the present invention;

FIG. 2 shows a schematic structural view of an air intake end cap according to an embodiment of the present invention;

FIG. 3 is a schematic view showing the structure of a main body at a first view angle according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a second view of the main body according to an embodiment of the present invention;

FIG. 5 is a schematic view showing the structure of an outlet end cover according to an embodiment of the present invention;

FIG. 6 shows a partial cross-sectional view of a gas heating device according to an embodiment of the present invention;

fig. 7 shows a schematic structural view of a gas heating apparatus according to an embodiment of the present invention.

Description of main reference numerals:

100-an air inlet end cover; 110-an air inlet hole; 120-a first cavity; 121-a first contact surface; 122-a first steering slot; 123-a first seal groove; 200-a main body; 210-a first protrusion; 211-a second contact surface; 220-a first boss; 230-a second seal groove; 240-spiral flow channel; 241—a flow channel inlet; 242-flow channel outlet; 250-second protrusions; 251-a third contact surface; 260-a second boss; 270-a third seal groove; 280-a first heat conduction cylinder; 281-a second heat conduction cylinder; 300-an air outlet end cover; 310-air outlet holes; 320-a second cavity; 321-fourth contact surface; 322-a second turning groove; 323-fourth seal groove; 400-air inlet pipe; 500-first connection; 600-outlet pipe; 700-second connector; 800-sealing member; 900-fixing piece.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Example 1

Referring to fig. 1 to 5, an embodiment of the present invention provides a gas heating device. The gas heating device is used for heating gas.

Referring to fig. 1 and 2, the gas heating device includes a gas inlet end cap 100, a main body 200, and a gas outlet end cap 300; the air inlet end cover 100 and the air outlet end cover 300 are respectively arranged at two ends of the main body 200; a plurality of spiral flow channels 240 are arranged in the main body 200, a first turning groove 122 is arranged on the air inlet end cover 100, and a second turning groove 322 is arranged on the air outlet end cover 300; the second turning groove 322 is communicated with the same end of at least two spiral flow channels 240, and the first turning groove 122 is communicated with the second turning groove 322 and at least one end of another spiral flow channel 240.

The gas inlet end cover 100 can inject the gas with lower temperature into the first spiral flow channel; the gas is in the first spiral flow passage and exchanges heat with the inner wall of the first spiral flow passage, so that the temperature is increased.

The gas passes through a first one of the spiral flow channels and enters the second turning groove 322, and the flow direction of the gas can be changed in the second turning groove 322 so that the gas enters the second one of the spiral flow channels. The gas enters the first turning groove 122 through the second spiral flow passage, and the flow direction of the gas is changed in the first turning groove 122 so that the gas enters the third spiral flow passage; in this way, the gas is circulated until it is discharged through the gas outlet end cap 300.

Compared with a cylindrical flow passage, the spiral flow passage 240 can effectively increase the heat exchange area between the gas and the inner wall of the flow passage, so that the gas is fully heated; when the gas heating device works, the gas can flow in the spiral flow channels 240 in sequence and exchange heat with the inner walls of the spiral flow channels 240 respectively, so that the residence time of the gas in the heating device is greatly prolonged, and the heating time of the gas is prolonged.

The gas heated by the gas heating device can be any one of air, oxygen, nitrogen and the like or mixed gas with a plurality of gases.

In some embodiments, when the gas is air, the gas heating device is used in a wind tunnel experiment apparatus; the air heating device can discharge air into a laboratory of the wind tunnel experimental equipment after the air is quickly heated, so that the aircraft can simulate a specific flight environment in the wind tunnel experimental equipment.

In other embodiments, when the gas is oxygen, the gas heating device is used in a gas cutting apparatus; the high temperature oxygen discharged from the gas outlet end cap 300 can be used to precisely cut a metal having a low melting temperature or to engrave on the surface of the metal.

Referring to fig. 2 to 5, two ends of the main body 200 are respectively provided with a first protruding portion 210 and a second protruding portion 250; the flow channel inlet 241 and the flow channel outlet 242 of the spiral flow channel 240 are respectively disposed on the first protrusion 210 and the second protrusion 250.

The air inlet end cover 100 is provided with a first accommodating cavity 120 corresponding to the first protruding portion 210, and the first steering groove 122 is provided on a first contact surface 121 of the first accommodating cavity 120; the air outlet end cover 300 is provided with a second cavity 320 corresponding to the second protrusion 250, and the second turning groove 322 is formed on a fourth contact surface 321 of the second cavity 320; the flow channel inlet 241 corresponds to the first diverting groove 122, and the flow channel outlet 242 corresponds to the second diverting groove 322.

The first protrusion 210 extends outwardly in the axial direction of the main body 200 at the left end of the main body 200; the second protrusion 250 is extended outwardly in the axial direction of the main body 200 at the right end of the main body 200, and the extension directions of the first protrusion 210 and the second protrusion 250 are parallel and opposite. The direction of the first cavity 120 on the air inlet end cover 100 is parallel to the extending direction of the first protrusion 210 on the main body 200; the direction of the second cavity 320 on the outlet end cap 300 is parallel to the extending direction of the second protrusion 250 on the main body 200.

When the inlet end cap 100 and the outlet end cap 300 are respectively fixed at two ends of the main body 200, the first protrusion 210 is disposed in the first cavity 120, and the second protrusion 250 is disposed in the second cavity 320.

The first contact surface 121 is provided with a plurality of first steering grooves 122, the second contact surface 211 of the first protruding portion 210 is provided with a plurality of first bosses 220, the plurality of first bosses 220 are respectively disposed in the corresponding first steering grooves 122, and the first contact surface 121 is abutted against the second contact surface 211; one or more flow channel inlets 241 are formed on the first boss 220.

The fourth contact surface 321 is provided with a plurality of second steering grooves 322, the third contact surface 251 of the second protruding portion 250 is provided with a plurality of second bosses 260, the second bosses 260 are respectively disposed in the corresponding second steering grooves 322, and the third contact surface 251 is abutted against the fourth contact surface 321; the second boss 260 is provided with one or more flow channel outlets 242.

An air inlet hole 110 is further formed in the air inlet end cover 100, and the air inlet hole 110 corresponds to the flow channel inlet 241 of the spiral flow channel 240; the gas can enter the spiral flow channel 240 through the gas inlet 110 and the flow channel inlet 241 in sequence.

An air outlet hole 310 is further provided on the air outlet end cover 300, and the air outlet hole 310 corresponds to the flow channel outlet 242 of the spiral flow channel 240; the gas in the spiral flow channel 240 can be discharged to the outside of the gas outlet cap 300 through the flow channel outlet 242 and the gas outlet hole 310 in sequence.

The gas flows into the spiral flow channel 240 through the gas inlet 110 and the flow channel inlet 241 in sequence; the air outlet 310 is communicated with the second diversion trench 322, and the air in the spiral flow channel 240 flows into the second diversion trench 322 through the flow channel outlet 242 and is discharged outwards through the air outlet 310.

In some embodiments, the first boss 220 has one or more flow channel inlets 241 formed thereon, and the second boss 260 has one or more flow channel outlets 242 formed thereon.

In this embodiment, the channel inlet 241 of the first spiral channel is the first channel inlet, the channel outlet 242 of the first spiral channel is the first channel outlet, and so on.

Referring to fig. 3, in some embodiments, a first one of the first bosses is a cylindrical boss, and is disposed at the center of the first protrusion 210, and a first one of the first bosses is provided with a first one of the flow channel inlets; the rest of the first bosses are arc-shaped bosses and are circumferentially arranged around the first bosses, and a plurality of runner inlets 241 are formed in the rest of the first bosses except the first bosses.

Referring to fig. 4, a first one of the second bosses is disposed on the second protruding portion 250 at a position corresponding to the first one of the first bosses, and a first one of the flow channel outlets corresponding to the first one of the flow channel inlets is disposed on the first one of the second bosses; the rest of the second bosses are arc-shaped bosses and are arranged around the circumference of the first second bosses.

It should be noted that the flow channel inlets 241 on the first boss 220 are not in one-to-one correspondence with the flow channel outlets 242 on the second boss 260.

The gas is injected into the first spiral flow channel through the air inlet hole 110 and the first flow channel inlet in sequence, and flows into the first second diversion channel through the first flow channel outlet, and the first spiral flow channel, the second spiral flow channel and the third spiral flow channel are communicated with the first second diversion channel through the first flow channel outlet 242, the flowing direction of the gas is changed in the first second diversion channel, and the gas respectively enters the second spiral flow channel and the third spiral flow channel through the second flow channel outlet and the third flow channel outlet.

The gas flows along the second spiral flow passage and the third spiral flow passage in the direction close to the air inlet end cover 100 until flowing into the first diversion groove, and the flow direction of the gas is changed in the second first diversion groove because the second flow passage inlet, the third flow passage inlet and the fourth flow passage inlet are communicated with the first diversion groove, so that the gas flows into the fourth spiral flow passage through the fourth flow passage inlet, and so on until the gas finally flows into the second diversion groove 322 communicated with the air outlet.

By the above means, the residence time of the gas in the main body 200 can be greatly increased, and the temperature of the gas after heating can be effectively increased.

The extending directions of the plurality of spiral flow channels 240 are all axial directions of the main body 200, and the shape of the flow channel inlet 241 formed on the first boss 220 is spiral, and the shape of the flow channel outlet 242 formed on the second boss 260 corresponds to the shape of the flow channel inlet 241, and is also spiral.

The spiral flow channel 240 can be machined on the main body 200 by a wire cutting process.

The gas heating device further includes a heater for heating the main body 200, thereby heat exchanging the inner wall of the spiral flow channel 240 with the gas. The heater is an eddy current heater.

In the gas heating device provided in this embodiment, by disposing the plurality of spiral flow channels 240 in the main body 200, the gas can exchange heat with the inner wall of the spiral flow channels 240, so as to raise the temperature of the gas; the gas inlet end cap 100 can inject the gas into one of the spiral flow channels 240 so that the gas flows into the second turn groove 322 of the gas outlet end cap 300; since the second diversion trench 322 is communicated with the same ends of at least two spiral flow channels 240, after the flow direction of the gas is changed in the second diversion trench 322, the gas can flow into the first diversion trench 122 on the air inlet end cover 100 through other spiral flow channels 240 communicated with the second diversion trench 322; since the first diverting groove 122 is also communicated with at least one end of the other spiral flow channel 240, the gas flows again in the direction of the second diverting groove 322 after the flowing direction of the gas is changed in the first diverting groove 122; in this way, the gas is circulated until it is discharged through the gas outlet end cap 300. The gas heating device can remarkably increase the residence time of the gas, and the spiral flow passage 240 can effectively increase the heat exchange area between the gas and the gas flow passage, so that the heating effect of the gas heating device on the gas is improved, and the heating efficiency is improved.

Example two

Referring to fig. 1 to 7, the present embodiment provides a gas heating device. The present embodiment is an improvement on the technical basis of the first embodiment described above, and is different from the first embodiment described above in that:

referring to fig. 6 and 7, the gas heating apparatus further includes a fixing member 900, where the fixing member 900 is used for fixedly connecting the gas inlet end cap 100 with the main body 200, and fixedly connecting the gas outlet end cap 300 with the main body 200.

In some embodiments, the air inlet end cap 100 is provided with a first fixing portion, the end of the main body 200 away from the air outlet end cap 300 is provided with a second fixing portion, and the fixing member 900 can fixedly connect the first fixing portion and the second fixing portion, so that the air inlet end cap 100 is fixedly connected with the main body 200.

The first fixing part is provided with a first through hole, and the second fixing part is provided with a second through hole; the fixing piece 900 is a bolt, and the fixing piece 900 sequentially passes through the first through hole and the second through hole and is matched with a nut, so that the first fixing portion is fixedly connected with the second fixing portion.

The end of the main body 200 away from the air inlet end cap 100 is provided with a third fixing portion, the air outlet end cap 300 is provided with a fourth fixing portion, and the fixing member 900 may also be fixedly connected with the third fixing portion by being matched with a nut.

The gas heating device further comprises a seal 800, the seal 800 comprising a first seal 800 and a second seal 800; the first seal 800 is used to seal the gap between the inlet end cap 100 and the first protrusion 210, and the second seal 800 is used to seal the gap between the outlet end cap 300 and the second protrusion 250.

As shown in fig. 2 and 3, a first sealing groove 123 is provided on the outer side of the first cavity 120, and a second sealing groove 230 corresponding to the first sealing groove 123 is provided on the outer side of the first protrusion 210; the first seal 800 is disposed between the first seal groove 123 and the second seal groove 230.

As shown in fig. 4 and 5, a third sealing groove 270 is provided on the outer side of the second protruding portion 250, and a fourth sealing groove 323 corresponding to the third sealing groove 270 is provided on the outer side of the second accommodating cavity 320; the second seal 800 is disposed between the third seal groove 270 and the fourth seal groove 323.

The seal 800 is an octagonal gasket having a self-tightening feature, and the sealing performance of the octagonal gasket increases as the internal air pressure increases.

Referring to fig. 7, the gas heating device further includes a first connecting member 500, a gas inlet pipe 400, a second connecting member 700, and a gas outlet pipe 600; the first connector 500 is connected to the air inlet end cap 100 through the air inlet pipe 400, and the second connector 700 is connected to the air outlet end cap 300 through the air outlet pipe 600.

The first connector 500 is used for connecting a gas manufacturing apparatus or a gas storage apparatus so as to inject the gas to be heated into the gas inlet end cap 100; the second connector 700 is used to connect a shower head of a gas cutting apparatus or a laboratory of a wind tunnel experiment apparatus so as to use the heated gas.

The first connecting member 500 and the second connecting member 700 are flanges; the air inlet pipe 400 and the air outlet pipe 600 are conical pipes, first external threads are respectively arranged at two ends of the air inlet pipe 400, and the air inlet pipe 400 is respectively connected with the first connecting piece 500 and the air inlet hole 110 through a threaded structure; the two ends of the air outlet pipe 600 are respectively provided with second external threads, and the air outlet pipe 600 is respectively connected with the second connecting piece 700 and the air outlet hole 310 through a thread structure.

In some embodiments, referring to fig. 4, the main body 200 includes a first heat-conducting tube 280 and a second heat-conducting tube 281, the second heat-conducting tube 281 is disposed in the first heat-conducting tube 280, and the spiral flow channel 240 is disposed on each of the first heat-conducting tube 280 and the second heat-conducting tube 281.

The first heat conductive cylinder 280 is a stainless steel cylinder, the second heat conductive cylinder 281 is a copper cylinder, and the heat conductivity coefficient of the second heat conductive cylinder 281 is greater than that of the first heat conductive cylinder 280; the heater of the gas heating device can heat the first heat conductive cylinder 280, and the first heat conductive cylinder 280 can transfer heat to the second heater 281, thereby improving the stability of the gas during heating.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims

1. The gas heating device is characterized by comprising an air inlet end cover, a main body and an air outlet end cover; the air inlet end cover and the air outlet end cover are respectively arranged at two ends of the main body; the novel air inlet device comprises a main body, and is characterized in that a plurality of spiral runners are arranged in the main body, a first steering groove is arranged on the air inlet end cover, a second steering groove is arranged on the air outlet end cover, the first steering groove is communicated with at least two identical ends of the spiral runners, and the second steering groove is communicated with one end of one other spiral runner while the first steering groove is communicated with the spiral runners.

2. The gas heating device according to claim 1, wherein the main body is provided with a first protrusion and a second protrusion at both ends thereof, respectively; the flow channel inlet and the flow channel outlet of the spiral flow channel are respectively arranged on the first bulge and the second bulge; the air inlet end cover is provided with a first containing cavity corresponding to the first protruding part, and the first steering groove is formed in the inner wall of the first containing cavity; the air outlet end cover is provided with a second containing cavity corresponding to the second protruding part, and the second steering groove is formed in the inner wall of the second containing cavity.

3. The gas heating device of claim 2, wherein the first turning groove is formed on a first contact surface of the first cavity; a first boss is arranged on the second contact surface of the first protruding part, and the runner inlet is formed in the first boss; the first contact surface is propped against the second contact surface, and the first boss is arranged in the first steering groove; a second boss is arranged on the third contact surface of the second bulge, and the runner outlet is arranged on the second boss; the second steering groove is formed in a fourth contact surface of the second accommodating cavity; the third contact surface is propped against the fourth contact surface, and the second boss is arranged in the second steering groove.

4. A gas heating device according to claim 3, wherein a plurality of first steering grooves are formed in the first contact surface, a plurality of first bosses are formed in the second contact surface, and the first bosses are respectively arranged in the corresponding first steering grooves; the fourth contact surface is provided with a plurality of second steering grooves, the third contact surface is provided with a plurality of second bosses, and the second bosses are respectively arranged in the corresponding second steering grooves.

5. The gas heating device of claim 4, wherein a plurality of said flow channel inlets are formed in said first boss and a plurality of said flow channel outlets are formed in said second boss.

6. A gas heating apparatus according to claim 3, wherein the extending directions of the plurality of spiral flow passages are all axial directions of the main body, and the opening shape of the flow passage inlet on the first boss is spiral, and the opening shape of the flow passage outlet on the second boss corresponds to the shape of the flow passage inlet.

7. The gas heating device of claim 1, wherein the body comprises a first thermally conductive barrel and a second thermally conductive barrel, the second thermally conductive barrel being disposed within the first thermally conductive barrel; the first heat conduction cylinder and the second heat conduction cylinder are respectively provided with the spiral flow passage; the heat conductivity of the first heat conduction cylinder is larger than that of the second heat conduction cylinder.

8. A gas heating apparatus as claimed in claim 1, further comprising a seal disposed between the inlet end cap and the body and between the outlet end cap and the body.

9. The gas heating device of claim 8, wherein the seal comprises a first seal and a second seal; the air inlet end cover is provided with a first sealing groove, one end of the main body, which is far away from the air outlet end cover, is provided with a second sealing groove, and the first sealing piece is arranged between the first sealing groove and the second sealing groove; the main part is kept away from the one end of air inlet end cover is equipped with the third seal groove, set up the fourth seal groove on the air outlet end cover, the second sealing member is located the third seal groove with between the fourth seal groove.

10. The gas heating device of claim 1, further comprising a first connector, a gas inlet tube, a second connector, and a gas outlet tube; the first connecting piece is connected with the air inlet end cover through the air inlet pipe, and the second connecting piece is connected with the air outlet end cover through the air outlet pipe.