CN219473791U - Gas heating stove - Google Patents

Abstract

The application relates to a gas heating stove, which comprises a shell, a main heat exchange assembly and a burner, wherein the main heat exchange assembly and the burner are arranged in the shell; the first guide piece is provided with a first accommodating cavity for accommodating the annular finned tube, the side wall of the first guide piece is provided with a first through hole, a gap exists between the inner side wall of the first guide piece and the outer wall of the annular finned tube, and a gap exists between the outer side wall of the first guide piece and the inner wall of the shell. According to the gas heating furnace, the annular fin tubes are arranged to increase the gaps between two adjacent rings of tube sections and the surface area for heat exchange, so that the heat exchange efficiency is improved, and particles generated by combustion are not easy to adhere to the annular fin tubes, so that the annular fin tubes maintain good heat exchange performance; through setting up first water conservancy diversion spare to the flow direction of guide high temperature flue gas slows down the velocity of flow of high temperature flue gas, thereby prolongs the heat transfer time of high temperature flue gas and annular finned tube, improves heat exchange efficiency.

Description

Gas heating stove

Technical Field

The application relates to the technical field of heating furnaces, in particular to a gas heating furnace.

Background

In the related art, a heating furnace includes a tubular burner and a spiral ring coil, and high-temperature gas generated by burning fuel gas through the burner exchanges heat with cooling water flowing through the ring coil, thereby heating the cooling water in the ring coil. However, because the flow rate of the high-temperature gas is large and the gap between any two adjacent annular coils is small, the high-temperature gas is easy to be discharged from the smoke outlet of the heating stove shell along the axial direction of the tubular burner due to insufficient heat exchange between the high-temperature gas and the annular coils, and therefore the heat exchange efficiency of the heating stove is low.

Disclosure of Invention

The technical problem that this application solved is to provide a gas heating stove, and it can prolong the heat exchange time of high temperature flue gas and heat exchanger to improve the heat exchange efficiency of gas heating stove.

The technical problems are solved by the following technical scheme:

the gas heating furnace comprises a shell, a main heat exchange assembly and a burner, wherein the main heat exchange assembly and the burner are arranged in the shell, the main heat exchange assembly comprises an annular finned tube and a first flow guide piece, and the annular finned tube is arranged around the burner;

the first guide piece is provided with a first accommodating cavity for accommodating the annular fin tube, the side wall of the first guide piece is provided with a first through hole, a gap exists between the inner side wall of the first guide piece and the outer wall of the annular fin tube, and a gap exists between the outer side wall of the first guide piece and the inner wall of the shell.

The gas heating stove that this application stated, compared with the prior art produced beneficial effect:

this application is through adopting annular finned tube as the heat exchange tube, compares in conventional annular coil pipe, can increase the clearance between two adjacent circle tube coupling, also can increase the surface area that carries out the heat exchange with high temperature gas to improve heat exchange efficiency, make the particulate matter that the burning produced be difficult for adhering on annular finned tube simultaneously, make annular finned tube keep good heat exchange performance for a long time. Meanwhile, the flow direction of the high-temperature smoke is guided by the first guide piece, and the specific is that: when the gas heating furnace works, the mixed gas is combusted in the gas burner to generate high-temperature smoke, and the first accommodating cavity is communicated with a gap between the outer side wall of the first guide piece and the inner wall of the shell through the first through hole, so that the high-temperature smoke can be circumferentially diffused after being discharged from the burner, and then flows through the gap between the annular fin tubes and the first through hole in sequence and flows into the gap between the outer side wall of the first guide piece and the inner wall of the shell; during the period, the flow path of the high-temperature flue gas is changed twice, so that the flow speed of the high-temperature flue gas is slowed down, the heat exchange time of the high-temperature flue gas and the annular finned tube is prolonged, and the heat exchange efficiency of the gas heating furnace is improved; and because the high-temperature flue gas flows through the gaps among the annular finned tubes, particles generated by combustion are more difficult to adhere to the annular finned tubes, so that the annular finned tubes are ensured to maintain good heat exchange performance for a long time.

In one embodiment, the first flow guide comprises a first flow guide portion and a second flow guide portion;

the second flow guiding part is arranged around the annular fin tube, and the first flow guiding part is arranged at the lower end of the second flow guiding part; the first flow guiding part and the second flow guiding part define the first accommodating cavity;

the first through hole is arranged on the side wall of the second flow guiding part.

So, through setting up first guiding portion, second guiding portion and first through-hole to the flow direction of high temperature flue gas is led jointly, and the velocity of flow of high temperature flue gas can be slowed down to a certain extent to first through-hole moreover, makes the time of the clearance of high temperature flue gas between the outer wall of annular finned tube and the inside wall of second guiding portion longer, thereby is favorable to prolonging the heat transfer time of high temperature flue gas and annular finned tube, improves the heat exchange efficiency of gas heating stove.

In one embodiment, the first flow guiding portion is connected with the housing, a second through hole is formed in the first flow guiding portion, and a gap between an outer wall of the second flow guiding portion and an inner wall of the housing is communicated with the second through hole. In this way, the high-temperature flue gas flows out of the gap between the inner wall of the shell and the outer side wall of the second flow guiding part through the second through hole.

In one embodiment, the first flow guiding portion is provided with a third through hole, and a gap between the inner wall of the second flow guiding portion and the outer wall of the annular fin tube is communicated with the third through hole. Thus, the particulate matters generated by the combustion of the mixed gas by the burner can be discharged from the third through hole, so that the adhesion of the particulate matters to the annular finned tube is improved, and the annular finned tube is ensured to maintain good heat exchange performance for a long time.

In one embodiment, a groove is formed in one side, facing the second flow guiding portion, of the first flow guiding portion, a gap between the inner wall of the second flow guiding portion and the outer wall of the annular fin tube is communicated with the groove, and the third through hole is formed in the bottom of the groove. In this way, the particulate matter produced by the combustion is deposited in the grooves.

In one embodiment, the primary heat exchange assembly further comprises a first heat shield disposed between the bottom of the burner and the upper surface of the first flow guide and a second heat shield disposed between the top of the annular fin tube and the inner top wall of the housing. In this way, the first heat insulation piece is arranged to insulate the burner and the first flow guiding part; the second heat insulating member is provided to insulate the outer shell and the annular fin tube.

In one embodiment, the gas heating furnace further comprises a condensation heat exchange assembly arranged in the shell, and the main heat exchange assembly and the condensation heat exchange assembly are arranged in sequence along the flow direction of the flue gas;

the condensing heat exchange assembly comprises an annular coil pipe and a second flow guide piece, two ends of the second flow guide piece are communicated, one end of the second flow guide piece is communicated with the second through hole and the third through hole, and the other end of the second flow guide piece is communicated with a cavity formed by encircling the annular coil pipe.

Therefore, the condensing heat exchange component is arranged to fully utilize high-temperature gas, and the cooling water flowing through the annular coil pipe can be preheated, so that the heat exchange efficiency of the gas heating furnace is improved; through setting up the second water conservancy diversion spare to guide high temperature gas inflow annular coil pipe encloses the cavity that closes the formation, thereby make the high temperature gas that flows through the heat transfer finned tube carry out heat transfer with annular coil pipe, in order to improve the heat exchange efficiency of gas heating stove.

In one embodiment, the condensing heat exchange assembly further comprises at least two spacers, all of which are disposed at intervals along the circumference of the annular coil, the spacers being used to define the size of the gap between two adjacent turns of the annular coil. Therefore, the size of the gap between the two adjacent circles of pipe sections of the annular coil pipe is changed through the isolating piece, so that the flow speed of high-temperature gas flowing through the gap between the two adjacent circles of pipe sections of the annular coil pipe is changed, and the high-temperature gas in the cavity formed by encircling the annular coil pipe flows out of the gap between the two adjacent circles of pipe sections of the annular coil pipe as much as possible, so that the heat exchange efficiency of the gas heating furnace is further improved.

In one embodiment, the spacer comprises a mounting portion and a plurality of spacer portions arranged on the mounting portion at intervals along the length direction of the mounting portion, and each spacer portion is inserted between two adjacent rings of pipe sections of the annular coil. Thus, the gap between two adjacent turns of pipe sections of the annular coil is changed by adjusting the size of the spacer.

In one embodiment, the annular coil comprises a first heat exchange part, a second heat exchange part and a third heat exchange part which are arranged in an annular spiral shape; the second heat exchange part is sleeved outside the first heat exchange part in a spacing mode, the third heat exchange part is sleeved outside the second heat exchange part in a spacing mode, and the isolating piece is arranged on part or all of the heat exchange parts. Therefore, the heat exchange area of the annular coil is increased by arranging the first heat exchange part, the second heat exchange part and the third heat exchange part, so that the heat exchange efficiency of the gas heating furnace is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application.

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of a gas heating stove according to an embodiment of the present application.

Fig. 2 is an assembly schematic diagram of a gas heating stove according to an embodiment of the present application.

Fig. 3 is a schematic cross-sectional view of the present application corresponding to fig. 2.

Fig. 4 is a schematic structural diagram of a first flow guiding member according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a first flow guiding portion according to an embodiment of the present application.

FIG. 6 is an exploded view of a primary heat exchange assembly according to one embodiment of the present application.

FIG. 7 is an exploded schematic view of a condensing heat exchange assembly in an embodiment of the present application.

Fig. 8 is a schematic diagram illustrating the assembly of a condensing heat exchanger assembly in an embodiment of the present application.

Fig. 9 is an exploded view of a part of the structure of a gas heating furnace according to an embodiment of the present application.

Reference numerals illustrate:

10. a gas heating furnace; 11. a housing; 111. a second accommodation chamber; 112. a first sub-housing; 113. a second sub-housing; 12. a main heat exchange assembly; 121. annular finned tubes; 1211. an annular heat exchange tube; 1212. a fin; 122. a first flow guide; 1221. a first accommodation chamber; 1222. a first through hole; 1223. a first flow guiding part; 1223a, grooves; 1223b, second through holes; 1223c, third through holes; 1224. a second flow guiding part; 1224a, a sub-deflector; 123. a first heat insulating member; 124. a second heat insulating member; 125. a second fastener; 13. condensing and heat exchanging components; 131. an annular coil; 1311. a first heat exchange part; 1312. a second heat exchange part; 1313. a third heat exchange section; 1314. a first annular gap; 1315. a second annular gap; 132. a second flow guide; 1321. a fourth through hole; 133. a clamping unit; 1331. a first clamping member; 1332. a second clamping member; 1333. a first fastener; 134. a spacer; 1341. a mounting part; 1342. an isolation part; 14. a discharge pipe; 141. a first section; 142. a second section; 143. a first seal; 15. a burner; 151. a fifth through hole; 16. a fan joint; 17. an ignition probe; 18. a second seal; 19. a third seal; 21. a fourth seal; 22. a heating water outlet joint; 23. a heating water inlet joint; 24. and a water pipe adapter.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element 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 application.

Furthermore, the terms "first," "second," and the like, if any, 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 at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through 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.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

FIG. 1 is an exploded view of a gas heating stove according to an embodiment of the present application; FIG. 2 is an assembled schematic view of a gas heating stove according to an embodiment of the present application; fig. 3 is a schematic cross-sectional view of the present application corresponding to fig. 2.

Referring to fig. 1-3, a gas heating furnace 10 is provided, the gas heating furnace 10 includes a housing 11, a main heat exchange assembly 12 and a burner 15 disposed within the housing 11, the main heat exchange assembly 12 including an annular fin tube 121 and a first deflector 122. The first flow guide 122 is provided with a first accommodation chamber 1221 for accommodating the annular fin tube 121, a first through hole 1222 is provided in a side wall of the first flow guide 122, a gap exists between an inner side wall of the first flow guide 122 and an outer wall of the annular fin tube 121, and a gap exists between an outer side wall of the first flow guide 122 and an inner wall of the housing 11.

In this way, the annular fin tube 121 is adopted to replace the annular coil tube in the related art, so that the gap between two adjacent rings of tube sections and the surface area for heat exchange with high-temperature gas can be increased, and the heat exchange efficiency of the gas heating furnace 10 can be improved; by arranging the first guide member 122 to guide the flow direction of the high-temperature gas, and because the first accommodating cavity 1221 is communicated with the gap between the outer side wall of the first guide member 122 and the inner wall of the shell through the first through hole 1222, the high-temperature flue gas is circumferentially diffused after being discharged from the burner 15, and then flows through the gap between the annular fin tubes 121 and the first through hole 1222 in sequence, and flows into the gap between the outer side wall of the first guide member 122 and the inner wall of the shell, during the period, the flow path of the high-temperature flue gas is changed twice, the flow speed of the high-temperature flue gas is slowed down, so that the heat exchange time of the high-temperature flue gas and the annular fin tubes 121 is prolonged, and the heat exchange efficiency of the gas heating furnace 10 is improved; and, since the high temperature flue gas flows through the gaps between the annular fin tubes 121, it is more difficult for the particulate matter generated by the combustion to adhere to the annular fin tubes 121, thereby ensuring that the annular fin tubes 121 maintain good heat exchanging performance for a long time.

It is understood that in the present application, the annular fin tube 121 includes an annular heat exchange tube 1211 and fins 1212, and the outer surface of the annular heat exchange tube 1211 is provided with a plurality of fins 1212 at intervals along the curved extending direction of the annular heat exchange tube 1211. In addition, the sidewall of the burner 15 is provided with a plurality of fifth through holes 151 so that the high temperature flue gas flows from the burner 15 into the annular fin tube 121 through the fifth through holes 151.

Thus, by providing the fins 1212 to increase the surface area of the annular fin tube 121, the heat exchange efficiency of the annular fin tube 121 is improved.

FIG. 4 is a schematic structural view of a first flow guiding member according to an embodiment of the present disclosure; fig. 5 is a schematic structural diagram of a first flow guiding portion according to an embodiment of the present application.

Referring to fig. 4 and 5, in conjunction with fig. 1 and 3, in some embodiments, the first flow guide 122 includes a first flow guide 1223 and a second flow guide 1224. The second flow guiding part 1224 is arranged around the annular fin tube 121, and the first flow guiding part 1223 is arranged at the lower end of the second flow guiding part 1224; the first and second flow-guiding portions 1223 and 1224 define a first receiving cavity 1221; the first through hole 1222 is provided at a sidewall of the first flow guiding portion 1223. It is understood that, in the present application, a plurality of first through holes 1222 are provided at intervals on the sidewall of the first flow guiding part 1223.

In this way, by arranging the first flow guiding portion 1223, the second flow guiding portion 1224 and the first through hole 1222, the flow direction of the high-temperature flue gas is commonly guided, and the first through hole 1222 can slow down the flow speed of the high-temperature flue gas to a certain extent, so that the time of the gap between the outer wall of the annular fin tube 121 and the inner wall of the second flow guiding portion 1224 is longer, thereby being beneficial to prolonging the heat exchange time of the high-temperature flue gas and the annular fin tube 121, and further improving the heat exchange efficiency of the gas heating stove 10.

Referring to fig. 1 and 4, in some embodiments, the second diversion portion 1224 includes two sub-diversion portions 1224a, where the two sub-diversion portions 1224a are detachably connected. It will be appreciated that the two sub-flow guides 1224a may be connected by snap-fit, or may be detachably connected by other means, which is not limited herein.

Referring to fig. 4 and 5, in some embodiments, the first diversion portion 1223 is connected to the housing 11, the first diversion portion 1223 is provided with a second through hole 1223b, and a gap between an outer wall of the second diversion portion 1224 and an inner wall of the housing 11 is communicated with the second through hole 1223 b.

In this way, the high temperature flue gas is allowed to flow out of the gap between the inner wall of the housing 11 and the outer side wall of the second flow guide portion 1224 through the second through hole 1223 b.

Referring to fig. 5, in some embodiments, the first flow guiding portion 1223 is provided with a third through hole 1223c, and a gap between an inner wall of the second flow guiding portion 1224 and an outer wall of the annular fin tube 121 is in communication with the third through hole 1223c.

In this way, the particulate matter generated by the combustion of the mixed gas by the burner 15 can be discharged from the third through-holes 1223c, so that the adhesion of the particulate matter to the annular fin tube 121 is improved, thereby ensuring that the annular fin tube 121 maintains good heat exchange performance for a long period of time.

Referring to fig. 5, in some embodiments, a groove 1223a is disposed on a side of the first flow guiding portion 1223 facing the second flow guiding portion 1224, a gap between an inner wall of the second flow guiding portion 1224 and an outer wall of the annular fin tube 121 is communicated with the groove 1223a, and a third through hole 1223c is opened at a bottom of the groove 1223 a. It is understood that the high temperature gas located in the gap between the outer wall of the annular fin tube 121 and the inner wall of the second flow guide portion 1224 can flow out of the first accommodation chamber 1221 from the third through hole 1223c.

Thus, by providing the recess 1223a, the particulate matter generated by the combustion of the mixed gas by the burner 15 falls down and is deposited in the recess 1223a by the gravity, and the third through-hole 1223c is opened at the bottom of the recess 1223a, so that the particulate matter is discharged from the third through-hole 1223c.

Referring to fig. 4 and 5, in some embodiments, a plurality of grooves 1223a are provided at intervals around the annular fin tube 121, and a bottom of each groove 1223a is provided with a plurality of third through holes 1223c at intervals along a bending extending direction of the groove 1223 a. Thus, by providing a plurality of grooves 1223a, it is advantageous to deposit particulate matter generated by combustion; by providing a plurality of third through holes 1223c, the particulate matter generated by combustion is discharged in time. In another embodiment, the grooves 1223a may be disposed in a ring shape, and in another embodiment, the grooves 1223a are disposed in an arc shape and have different lengths.

Referring to fig. 1, 3 and 6, in some embodiments, the primary heat exchange assembly 12 further includes a first heat shield 123 and a second heat shield 124, the first heat shield 123 being disposed between the bottom of the burner 15 and the upper surface of the first flow guide 1223, the second heat shield 124 being disposed between the top of the annular fin tube 121 and the inner top wall of the housing 11. Optionally, the first insulation 123 and the second insulation 124 are each insulation wool.

In this way, by providing the first heat insulating member 123 and the second heat insulating member 124 to insulate the housing 11 and the first flow guide portion 1223, heat dissipation is reduced.

Referring to FIG. 1, in some embodiments, the primary heat exchange assembly 12 further includes a second fastener 125, the second fastener 125 extending into the first deflector 1223, the first insulation 123, and the bottom of the burner 15, in sequence. Optionally, the second fastening member 125 includes a bolt and a nut, and the bolt sequentially extends into the first flow guiding part 1223, the first heat insulating member 123 and the bottom of the burner 15, and then the bolt is connected through the nut to fix the first flow guiding part 1223, the first heat insulating member 123 and the burner 15. It will be appreciated that the first flow guiding portion 1223, the first heat insulating member 123 and the burner 15 may be connected and fixed by other means, which is not limited herein.

Referring to fig. 7 and 8, and in conjunction with fig. 1 and 3, in some embodiments, the gas heating stove 10 further includes a condensation heat exchange assembly 13 disposed in the housing 11, where the main heat exchange assembly 12 and the condensation heat exchange assembly 13 are disposed sequentially along a flow direction of the flue gas (the flow direction of the flue gas is shown as X direction in fig. 1). The condensation heat exchange assembly 13 comprises an annular coil 131 and a second guide member 132, two ends of the second guide member 132 are communicated, one end of the second guide member 132 is communicated with the second through hole 1223b and the third through hole 1223c, and the other end is communicated with a cavity formed by encircling the annular coil 131.

It will be appreciated that the second flow guide 132 is disposed axially of the annular fin tube 121 between the first flow guide 1223 and the annular coil 131; the through arrangement of the two ends of the second flow guiding element 132 means that the second flow guiding element 132 is provided with a fourth through hole 1321 along the axial direction of the annular fin tube 121, one end of the fourth through hole 1321 is communicated with the second through hole 1223b and the third through hole 1223c, and the other end is communicated with a cavity formed by enclosing the annular coil 131.

In the present application, the heat exchange medium in the annular coil 131 and the annular fin tube 121 can flow through each other.

In this way, by arranging the condensation heat exchange component 13, the high-temperature gas after having exchanged heat with the annular fin tube 1221 exchanges heat with the annular coil 131, so as to fully utilize the high-temperature gas, and also preheat the heat exchange medium flowing through the annular coil 131, fully utilize the flue gas waste heat, and further improve the heat exchange efficiency of the gas heating furnace 10; by arranging the second guide member 132, the high-temperature gas is guided to flow into the cavity formed by the surrounding of the annular coil pipe 131, so that the high-temperature gas flowing through the annular fin pipe 121 exchanges heat with the annular coil pipe 131, and the heat exchange efficiency of the gas heating furnace 10 is improved.

Referring to fig. 7 and 8, in conjunction with fig. 1 and 3, in some embodiments, the condensing heat exchange assembly 13 further includes at least two spacers 134, all of the spacers 134 being disposed at intervals along the circumference of the annular coil 131, the spacers 134 being configured to define the size of the gap between two adjacent turns of the annular coil 131. It will be appreciated that by varying the dimension of the spacer 134 in the axial direction of the annular coil 131, the gap between any two adjacent turns of the annular coil 131 can be adjusted to meet different demands; the number of spacers 134 may be set as desired, and when a plurality of spacers 134 are provided, all of the spacers 134 are uniformly spaced around the circumference of the annular coil 131.

In this way, the size of the gap between the two adjacent circles of pipe sections of the annular coil 131 is changed through the spacer 134, so that the flow rate of the high-temperature gas flowing through the gap between the two adjacent circles of pipe sections of the annular coil 131 is changed, and the high-temperature gas in the cavity formed by encircling the annular coil 131 flows out of the gap between the two adjacent circles of pipe sections of the annular coil 131 as much as possible, so that the heat exchange efficiency of the gas heating furnace 10 is further improved.

Referring to fig. 1, 7 and 8, in some embodiments, the spacer 134 includes a mounting portion 1341 and a plurality of spacer portions 1342 disposed on the mounting portion 1341 at intervals along a length of the mounting portion 1341, and each spacer portion 1342 is interposed between two adjacent turns of the annular coil 131.

In this way, the gap between adjacent turns of the annular coil 131 is changed by adjusting the size of the separator 1342.

Referring to fig. 1, 7, and 8, in some embodiments, the annular coil 131 includes a first heat exchange portion 1311, a second heat exchange portion 1312, and a third heat exchange portion 1313 arranged in an annular spiral; the second heat exchange portion 1312 is sleeved outside the first heat exchange portion 1311 at intervals, the third heat exchange portion 1313 is sleeved outside the second heat exchange portion 1312 at intervals, and the separator 134 is disposed on part or all of the heat exchange portions. It is understood that the number of the heat exchanging parts can be set according to the needs, and is not limited to three in the application; the separator 134 may be provided in one of the first heat exchanging portion 1311, the second heat exchanging portion 1312, and the third heat exchanging portion 1313 alone, may be provided in any adjacent two of the heat exchanging portions, may be provided in three of the heat exchanging portions, and is not limited thereto.

In this way, the first heat exchanging portion 1311, the second heat exchanging portion 1312 and the third heat exchanging portion 1313 are sleeved at intervals, so that the heat exchanging area of the annular coil 131 is increased, and the heat exchanging efficiency of the gas heating furnace 10 is improved.

Referring to fig. 1, 7 and 8, in some embodiments, the condensing heat exchange assembly 13 further includes a clamping unit 133 disposed on the annular coil 131, where the clamping unit 133 is configured to clamp the first heat exchange portion 1311, the second heat exchange portion 1312 and the third heat exchange portion 1313, so that the first heat exchange portion 1311, the second heat exchange portion 1312 and the third heat exchange portion 1313 are relatively fixed. It will be appreciated that in the radial direction of the annular coil 131, a first annular gap 1314 is formed between the first heat exchange portion 1311 and the second heat exchange portion 1312, and a second annular gap 1315 is formed between the second heat exchange portion 1312 and the third heat exchange portion 1313.

Referring to fig. 1, 7 and 8, in some embodiments, the clamping unit 133 includes a first clamping piece 1331, a second clamping piece 1332 and a first fastener 1333. The first clamping piece 1331 and the second clamping piece 1332 are arranged at intervals along the axial direction of the annular coil 131, and the annular coil 131 is positioned between the first clamping piece 1331 and the second clamping piece 1332; the first fastener 1333 sequentially extends into the first clamping piece 1331 and the second clamping piece 1332.

Optionally, a plurality of first fasteners 1333 are provided, each of which extends into the first clamping member 1331, the first annular gap 1314 or the second annular gap 1315, and the second clamping member 1332 in sequence. It is understood that the specific composition structure of the clamping unit 133 is not limited to the first clamping piece 1331, the second clamping piece 1332 and the first fastening piece 1333 included in the embodiment of the present application, and may be provided as required.

Thus, by providing the clamping unit 133, the first heat exchanging part 1311, the second heat exchanging part 1312, and the third heat exchanging part 1313 are clamped; by providing a plurality of first fasteners 1333, stability of the clamping unit 133 is improved.

Fig. 9 is an exploded view of a part of the structure of a gas heating furnace according to an embodiment of the present application.

Referring to fig. 9, in combination with fig. 1 to 3, in some embodiments, the housing 11 is provided with a second accommodating cavity 111, and the main heat exchange assembly 12, the condensation heat exchange assembly 13, and the burner 15 are accommodated in the second accommodating cavity 111.

Referring to fig. 1, 3 and 9, in some embodiments, the gas heating furnace 10 is further provided with a discharge pipe 14, the discharge pipe 14 is provided on an outer surface of the housing 11, and an inlet of the discharge pipe 14 communicates with the second accommodating chamber 111 to discharge the high temperature gas flowing from the annular coil 131 into the second accommodating chamber 111.

Referring to fig. 1, 3 and 9, in some embodiments, the discharge pipe 14 includes a first section 141 and a second section 142, one end of the first section 141 is disposed on the outer surface of the housing 11, and an inlet of the first section 141 is in communication with the second receiving cavity 111, and one end of the second section 142 is connected to the other end of the first section 141, that is, an outlet of the first section 141 is in communication with an inlet of the second section 142.

In order to prevent leakage of flue gas, referring to fig. 1, 3 and 6, in some embodiments the discharge tube 14 is further provided with a first seal 143 connected to the first section 141 and the second section 142.

Referring to fig. 1, 3 and 9, in some embodiments, the gas heating stove 10 further includes a fan connector 16 provided to the housing 11 and an ignition probe 17 provided to the housing 11, and the gas enters the burner 15 from the fan connector 16, and the ignition probe 17 is used to ignite the mixed gas entering the burner 15, thereby generating high temperature flue gas.

Referring to fig. 1 and 9, in some embodiments, the gas heating furnace 10 further includes a second seal 18, where the second seal 18 is disposed between the fan joint 16 and the burner 15 along the first direction, for sealing the fan joint 16 to improve the gas leakage.

Referring to fig. 1 and 9, in some embodiments, the gas heating stove 10 further includes a third sealing member 19, where the third sealing member 19 is sleeved outside the burner 15, and is used to seal the burner 15 to improve the leakage of the high-temperature flue gas.

Referring to fig. 1 and 9, in some embodiments, the housing 11 includes a first sub-housing 112 and a second sub-housing 113 coupled to the first sub-housing 112; the gas heating furnace 10 further includes a fourth sealing member 21, wherein the fourth sealing member 21 is disposed between the first sub-housing 112 and the second sub-housing 113, and is used for sealing the first sub-housing 112 and the second sub-housing 113 to improve the condition of the first medium leakage. It will be appreciated that the housing 11 is provided as a second sub-housing 113 of the first sub-housing 112 which is detachably connected to facilitate the installation of the structure provided in the second receiving chamber 111.

Referring to fig. 1, 3 and 9, in some embodiments, the gas heating furnace 10 further includes a heating outlet fitting 22, a heating inlet fitting 23 and a water conduit adapter fitting 24 disposed on an outer side surface of the first sub-housing 112. The inlet of the heating water outlet joint 22 communicates with the outlet of the annular fin tube 121, and the cooling water flowing through the annular fin tube 121 flows out of the annular fin tube 121 through the inlet of the heating water outlet joint 22. Along the axial direction of the annular fin tube 121, a heating water outlet joint 22 is positioned at the upstream of a heating water inlet joint 23, and the outlet of the heating water inlet joint 23 is communicated with the inlet of the annular coil 131; the water pipe adapter 24 is located between the heating water outlet joint 22 and the heating water inlet joint 23, the inlet of the water pipe adapter 24 is communicated with the outlet of the annular coil pipe 131, the outlet of the water pipe adapter 24 is communicated with the inlet of the annular fin pipe 121, and cooling water flowing through the annular coil pipe 131 flows into the annular fin pipe 121 through the water pipe adapter 24.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A gas heating stove comprising a housing (11), a main heat exchange assembly (12) and a burner (15) which are arranged in the housing (11), characterized in that the main heat exchange assembly (12) comprises an annular fin tube (121) and a first flow guide (122), and the annular fin tube (121) is arranged around the burner (15);

the first flow guiding piece (122) is provided with a first accommodating cavity (1221) for accommodating the annular finned tube (121), a first through hole (1222) is formed in the side wall of the first flow guiding piece (122), a gap exists between the inner side wall of the first flow guiding piece (122) and the outer wall of the annular finned tube (121), and a gap exists between the outer side wall of the first flow guiding piece (122) and the inner wall of the shell (11).

2. The gas heating stove according to claim 1, characterized in that the first deflector (122) comprises a first deflector (1223) and a second deflector (1224);

the second flow guiding part (1224) is arranged around the annular fin tube (121), and the first flow guiding part (1223) is arranged at the lower end of the second flow guiding part (1224); the first flow guide (1223) and the second flow guide (1224) define the first accommodation chamber (1221);

the first through hole (1222) is arranged on the side wall of the second diversion part (1224).

3. The gas heating stove according to claim 2, characterized in that the first diversion part (1223) is connected with the housing (11), a second through hole (1223 b) is formed in the first diversion part (1223), and a gap between an outer wall of the second diversion part (1224) and an inner wall of the housing (11) is communicated with the second through hole (1223 b).

4. A gas heating stove according to claim 2, characterized in that the first flow guiding portion (1223) is provided with a third through hole (1223 c), and a gap between an inner wall of the second flow guiding portion (1224) and an outer wall of the annular fin tube (121) is communicated with the third through hole (1223 c).

5. A gas heating stove according to claim 4, characterized in that a groove (1223 a) is provided on a side of the first flow guiding portion (1223) facing the second flow guiding portion (1224), a gap between an inner wall of the second flow guiding portion (1224) and an outer wall of the annular fin tube (121) communicates with the groove (1223 a), and the third through hole (1223 c) is opened at a bottom of the groove (1223 a).

6. A gas heating furnace according to claim 5, wherein the main heat exchange assembly (12) further comprises a first heat insulator (123) and a second heat insulator (124), the first heat insulator (123) being provided between the bottom of the burner (15) and the upper surface of the first deflector (1223), the second heat insulator (124) being provided between the top of the annular fin tube (121) and the inner top wall of the housing (11).

7. A gas heating stove according to any one of claims 1-6, characterized in that the gas heating stove (10) further comprises a condensation heat exchange assembly (13) arranged in the housing (11), the main heat exchange assembly (12) and the condensation heat exchange assembly (13) being arranged in succession along the flow direction of the flue gas;

the condensing heat exchange assembly (13) comprises an annular coil (131) and a second flow guide piece (132), two ends of the second flow guide piece (132) are communicated, one end of the second flow guide piece (132) is communicated with a second through hole (1223 b) and a third through hole (1223 c), and the other end of the second flow guide piece is communicated with a cavity formed by encircling the annular coil (131).

8. A gas heating furnace according to claim 7, wherein the condensation heat exchange assembly (13) further comprises at least two spacers (134), all the spacers (134) being arranged at intervals along the circumference of the annular coil (131), the spacers (134) being adapted to define the size of the gap between two adjacent turns of the annular coil (131).

9. A gas heating stove according to claim 8, characterized in that the separator (134) comprises a mounting portion (1341) and a plurality of separator portions (1342) provided on the mounting portion (1341) at intervals along the length direction of the mounting portion (1341), each separator portion (1342) being interposed between two adjacent turns of the annular coil (131).

10. A gas heating furnace according to claim 8, characterized in that said annular coil (131) comprises a first heat exchange portion (1311), a second heat exchange portion (1312) and a third heat exchange portion (1313) arranged in an annular spiral; the second heat exchange part (1312) is sleeved outside the first heat exchange part (1311) at intervals, the third heat exchange part (1313) is sleeved outside the second heat exchange part (1312) at intervals, and the separator (134) is arranged on part or all of the heat exchange parts.