CN221923962U - Condensing heat exchanger and gas water heater - Google Patents

Abstract

The utility model provides a condensing heat exchanger and a gas water heater, and belongs to the technical field of water heating. The condensing heat exchanger comprises a shell and a heat exchange tube, wherein the shell comprises a shell body and a cover body fixedly connected to the upper end of the shell body, the shell body comprises a first shell body and a second shell body, the first shell body is connected with the second shell body, a cavity is formed by surrounding the first shell body, the second shell body and the cover body together, a part of the second shell body protrudes out of the peripheral side wall of the first shell body, the first shell body is located at one side of the second shell body protruding out of the first shell body, a smoke inlet port is formed in one side of the second shell body, a first through hole, a second through hole and a condensed water port are formed in the lower end of the shell body, a smoke outlet port is formed in the cover body, the heat exchange tube is arranged in the cavity body, the shape of the heat exchange tube is matched with the shape of the shell body, the water inlet end of the heat exchange tube penetrates through the first through hole, and the water outlet end of the heat exchange tube penetrates through the second through hole.

Description

Condensing heat exchanger and gas water heater

Technical Field

The utility model relates to the technical field of hot water equipment, in particular to a condensing heat exchanger and a gas water heater.

Background Art

The condensing gas water heater absorbs the waste heat of the flue gas through the condensing heat exchanger installed on one side of the fan assembly to preheat the water in the condensing heat exchanger, and then flows into the ordinary heat exchanger for secondary heating. Its thermal efficiency is more than 8% higher than that of ordinary gas water heaters, and it is an energy-saving and environmentally friendly water heating product.

The existing condensing heat exchanger for absorbing waste heat from flue gas occupies a large space on the side, which increases the size of the water heater, not only increasing the manufacturing cost, but also making it inconvenient for terminal installation. If the volume of the condensing heat exchanger is reduced, the preheating effect will be poor.

Utility Model Content

The utility model aims to provide a condensing heat exchanger which reduces the occupied space and realizes that when the volume of the condensing heat exchanger is increased, the volume of the hot gas water heater does not need to be increased accordingly.

The utility model also aims to provide a gas water heater comprising the above-mentioned condensing heat exchanger.

In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:

According to one aspect of the utility model, a condensing heat exchanger is provided, including an outer shell and a heat exchange tube, the outer shell including a shell and a cover body fixed to the upper end of the shell, the shell including a first shell and a second shell, the first shell is connected to the second shell, the first shell, the second shell and the cover body jointly surround a cavity, a portion of the second shell protrudes from the peripheral side wall of the first shell, the first shell is located on a side of the second shell protruding from the first shell and is provided with a smoke inlet interface, the lower end of the shell is provided with a first through hole, a second through hole and a condensed water interface, the cover body is provided with a smoke outlet interface, the heat exchange tube is arranged in the cavity, and the shape of the heat exchange tube is adapted to the shape of the shell, the water inlet end of the heat exchange tube passes through the first through hole, and the water outlet end of the heat exchange tube passes through the second through hole.

According to one embodiment of the present utility model, the heat exchange tube includes a first heat exchange tube, a second heat exchange tube and a third heat exchange tube which are interconnected. The first heat exchange tube, the second heat exchange tube and the third heat exchange tube are spaced apart and arranged sequentially from front to back. The first heat exchange tube, the second heat exchange tube and the third heat exchange tube are all in the shape of a "7".

According to one embodiment of the utility model, the first heat exchange tube includes a first "7"-shaped tube, a second "7"-shaped tube and a first arc-shaped tube which are interconnected. The first "7"-shaped tube, the second "7"-shaped tube and the first arc-shaped tube jointly surround a first "7"-shaped gap, and the lower end of the first "7"-shaped tube passes through the first through hole.

According to one embodiment of the utility model, the second heat exchange tube includes a third "7"-shaped tube, a fourth "7"-shaped tube and a second arc tube that are interconnected, the third "7"-shaped tube, the fourth "7"-shaped tube and the second arc tube jointly surround a second "7"-shaped gap, and the lower end of the fourth "7"-shaped tube is connected to the lower end of the second "7"-shaped tube.

According to one embodiment of the utility model, the third heat exchange tube includes a fifth "7"-shaped tube, a sixth "7"-shaped tube and a third arc-shaped tube that are interconnected. The fifth "7"-shaped tube, the sixth "7"-shaped tube and the third arc-shaped tube jointly surround a third "7"-shaped gap. The lower end of the fifth "7"-shaped tube is connected to the lower end of the third "7"-shaped tube, and the lower end of the sixth "7"-shaped tube passes through the second through hole.

According to one embodiment of the utility model, it also includes a diverter plate, which is in the shape of a figure "7". The diverter plate is arranged in the first figure "7" shaped gap, the second figure "7" shaped gap and the third figure "7" shaped gap.

According to an embodiment of the utility model, both the transverse portion and the vertical portion of the diverter plate are provided with fixing members, and the diverter plate is mounted on the heat exchange tube via the fixing members.

According to one embodiment of the utility model, it also includes two nuts, the lower ends of the first "7"-shaped tube and the sixth "7"-shaped tube are both provided with an annular step and an external thread, the two nuts are respectively installed on the lower ends of the first "7"-shaped tube and the sixth "7"-shaped tube, and the nuts and the annular step jointly clamp the bottom wall of the shell.

According to one embodiment of the utility model, a groove is opened in the middle of the bottom wall of the first shell, the condensed water interface is located on the bottom wall of the groove, and the side wall of the groove is an inclined surface to guide the condensed water into the groove.

The utility model also provides a gas water heater, comprising a smoke exhaust fan and the above-mentioned condensing heat exchanger, wherein the smoke exhaust port of the smoke exhaust fan is connected to the smoke inlet interface.

An embodiment of the present invention has the following advantages or beneficial effects:

The condensing heat exchanger of the utility model has a protruding portion of the second shell extending toward the smoke exhaust fan, and the second shell is located above the smoke exhaust pipe of the smoke exhaust fan, and the smoke outlet of the smoke exhaust pipe of the smoke exhaust fan is connected to the smoke inlet interface, so that the position of the smoke exhaust pipe of the smoke exhaust fan is staggered with the position of the second shell to reduce the occupied space, thereby increasing the volume of the condensing heat exchanger without increasing the volume of the hot gas water heater accordingly.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

FIG. 1 is a perspective view showing a condensing heat exchanger according to an exemplary embodiment.

FIG. 2 is an exploded view of a condensing heat exchanger according to an exemplary embodiment.

FIG. 3 is a perspective view of a housing according to an exemplary embodiment.

FIG. 4 is an exploded view of a heat exchange tube according to an exemplary embodiment.

FIG. 5 is a cross-sectional view from a front perspective showing a condensing heat exchanger according to an exemplary embodiment.

FIG. 6 is a cross-sectional view of a condensing heat exchanger from a rear perspective according to an exemplary embodiment.

FIG. 7 is a cross-sectional view of a condensing heat exchanger from a right side perspective according to an exemplary embodiment.

FIG. 8 is a state diagram showing a condensing heat exchanger connected to a smoke exhaust fan according to an exemplary embodiment.

FIG. 9 is a diagram showing the internal structure of a gas water heater according to an exemplary embodiment.

The reference numerals are described as follows:

1. Shell; 11. Shell; 112. Smoke inlet; 113. First through hole; 114. Second through hole; 115. Condensate water interface; 12. Cover; 121. Smoke outlet; 13. Cavity; 2. Heat exchange tube; 21. First heat exchange tube; 211. First "7" shaped tube; 2111. Annular step; 212. Second "7" shaped tube; 213. First arc tube; 214. First "7" shaped tube shaped gap; 22, second heat exchange tube; 221, third "7" shaped tube; 222, fourth "7" shaped tube; 223, second arc tube; 23, third heat exchange tube; 231, fifth "7" shaped tube; 232, sixth "7" shaped tube; 233, third arc tube; 234, third "7" shaped gap; 3, diverter plate; 31, fixings; 4, nuts; 5, screws; 6, smoke exhaust fan.

DETAILED DESCRIPTION

Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are used to express an open-ended inclusive meaning and mean that additional elements/components/etc. may be present in addition to the listed elements/components/etc.

As shown in FIG. 1 to FIG. 9 , a condensing heat exchanger according to an embodiment of the utility model includes a shell 1 and a heat exchange tube 2 .

As shown in Figures 5 and 6, the outer shell 1 includes a shell 11 and a cover body 12 detachably installed on the upper end of the shell 11, the shell 11 includes a first shell and a second shell, the first shell is connected to the second shell, the first shell, the second shell and the cover body jointly surround a cavity 13, a part of the second shell protrudes from the peripheral side wall of the first shell, and the first shell is located on a side of the second shell protruding from the first shell and is provided with a smoke inlet interface 112 for connecting with the smoke exhaust port of the smoke exhaust fan 6.

A first through hole 113 , a second through hole 114 and a condensed water interface 115 are formed at the lower end of the housing 11 .

The cover body 12 is provided with a smoke outlet port 121 , so that the smoke exhausted by the smoke exhaust fan 6 is discharged through the smoke outlet port 121 .

The cross-sectional area of the second shell is greater than the cross-sectional area of the first shell.

As shown in Figures 1, 4, 5 and 6, the heat exchange tube 2 is arranged in the cavity 13, and the shape of the heat exchange tube 2 is adapted to the shape of the shell 11. The water inlet end of the heat exchange tube 2 passes through the first through hole 113, and the water outlet end of the heat exchange tube 2 passes through the second through hole 114.

Due to the temperature difference between the inside and the outside, condensed water is easily formed on the outer wall of the heat exchange tube 2, and the condensed water is discharged through the condensed water interface 115. For example, the condensed water interface 115 is connected to a guide pipe, and the guide pipe is connected to the condensed water collecting container. In this way, the condensed water can be discharged to avoid corrosion of the heat exchange tube 2.

The condensing heat exchanger provided in the present embodiment has a portion of the second shell protruding from the peripheral side wall of the first shell, and the first shell is provided with a smoke inlet interface 112 on the side of the second shell protruding from the first shell. The first shell and the second shell together form a "7" shape, and the protruding portion of the second shell extends toward the smoke exhaust fan 6, and the second shell is located above the smoke exhaust pipe of the smoke exhaust fan 6, and the smoke outlet of the smoke exhaust pipe of the smoke exhaust fan 6 is connected to the smoke inlet interface 112, so that the position of the smoke exhaust pipe of the smoke exhaust fan 6 is staggered with the position of the second shell to reduce the occupied space, so as to increase the volume of the condensing heat exchanger without increasing the volume of the hot gas water heater accordingly.

In a preferred embodiment of the present invention, the cover 12 is fixed to the upper end of the housing 11 by a plurality of screws 5 .

In a preferred embodiment of the present invention, the cover body 12 is formed by drawing through a press device, and the smoke outlet interface 121 is an annular connecting seat for connecting with a smoke exhaust pipe.

In a preferred embodiment of the present invention, a one-way valve is provided in the smoke outlet port 121 , and the one-way valve is configured to only allow smoke to be discharged, and external air cannot enter the cavity 13 .

Of course, the cover 12 is not limited to being fixed to the housing 11 by screws 5, but may also be fixed by a snap-fit piece. Those skilled in the art may select a fixing method of the cover 12 and the housing 11 according to actual needs.

As shown in FIGS. 4 , 5 and 6 , in a preferred embodiment of the present invention, the heat exchange tube 2 includes a first heat exchange tube 21 , a second heat exchange tube 22 and a third heat exchange tube 23 which are interconnected.

The first heat exchange tube 21 , the second heat exchange tube 22 and the third heat exchange tube 23 are all made of stainless steel, preferably a corrugated tube.

The first heat exchange tube 21 , the second heat exchange tube 22 and the third heat exchange tube 23 may be elliptical tubes, round tubes or special-shaped tubes, arranged in multiple rows of bends, and the tubes are spaced apart from each other.

The first heat exchange tube 21 , the second heat exchange tube 22 and the third heat exchange tube 23 are spaced apart and arranged in sequence from front to back. The first heat exchange tube 21 , the second heat exchange tube 22 and the third heat exchange tube 23 are all in a “7” shape.

The lower end of the first heat exchange tube 21 passes through the first through hole 113 for communicating with the water supply pipe.

The lower end of the third heat exchange tube 23 passes through the second through hole 114 and is used to communicate with the water inlet of the common heat exchanger of the gas water heater through a pipeline.

As shown in FIGS. 4 and 5 , in a preferred embodiment of the present invention, the first heat exchange tube 21 includes a first “7”-shaped tube 211 , a second “7”-shaped tube 212 and a first arc-shaped tube 213 which are interconnected.

The first “7”-shaped tube 211 , the second “7”-shaped tube 212 and the first arc-shaped tube 213 together surround a first “7”-shaped gap 214 , and the lower end of the first “7”-shaped tube 211 passes through the first through hole 113 .

As shown in FIG. 4 , in a preferred embodiment of the present invention, the second heat exchange tube 22 includes a third “7”-shaped tube 221 , a fourth “7”-shaped tube 222 and a second arc-shaped tube 223 which are interconnected.

The third "7"-shaped tube 221, the fourth "7"-shaped tube 222 and the second arc tube 223 jointly surround a second "7"-shaped gap. As shown in FIG. 7 , the lower end of the fourth "7"-shaped tube 222 is connected to the lower end of the second "7"-shaped tube 212.

As shown in FIGS. 4 and 6 , in a preferred embodiment of the present invention, the third heat exchange tube 23 includes a fifth “7”-shaped tube 231 , a sixth “7”-shaped tube 232 and a third arc-shaped tube 233 which are interconnected.

The fifth "7"-shaped tube 231, the sixth "7"-shaped tube 232 and the third arc-shaped tube 233 jointly surround a third "7"-shaped gap 234, the lower end of the fifth "7"-shaped tube 231 is connected to the lower end of the third "7"-shaped tube 221, and the lower end of the sixth "7"-shaped tube 232 passes through the second through hole 114.

As shown in Figures 4, 5, 6 and 7, the water in the water supply pipe first goes up through the vertical portion of the first "7"-shaped tube 211 of the first heat exchange tube 21, then flows horizontally through the lateral portion of the first "7"-shaped tube 211, and then passes through the first arc tube 213 to the lateral portion of the second "7"-shaped tube 212 and flows horizontally in the opposite direction, and then goes down through the vertical portion of the second "7"-shaped tube 212 until it flows into the fourth "7"-shaped tube 222 of the second heat exchange tube 22, repeats the above water flow journey in the second heat exchange tube 22 until it flows into the fifth "7"-shaped tube 231 of the third heat exchange tube 23, and finally flows out through the sixth "7"-shaped tube 232, thereby extending the water flow journey and achieving sufficient heat exchange.

As shown in Figures 2, 5 and 6, in a preferred embodiment of the utility model, it also includes a diverter plate 3, which is in the shape of a "7". The diverter plate 3 is arranged in the first "7" shaped gap 214, the second "7" shaped gap and the third "7" shaped gap 234. The diverter plate 3 is configured to increase the flow path of the flue gas in the cavity 13, so that the high-temperature flue gas is divided into two parts, which increases the residence time of the high-temperature flue gas around the first heat exchange tube 21, the second heat exchange tube 22 and the third heat exchange tube 23, and further improves the heat exchange efficiency.

As shown in FIGS. 2 , 5 and 6 , in a preferred embodiment of the present invention, the transverse and vertical portions of the diverter plate 3 are provided with fixing members 31 , and the diverter plate 3 is mounted on the heat exchange tube 2 via the fixing members 31 , thereby enhancing the installation stability of the diverter plate 3 .

Preferably, one end of the fixing member 31 is welded to the diverter plate 3, or the diverter plate 3 is provided with a connecting ear, and the fixing member 31 is passed through the connecting ear.

Preferably, the fixing member 31 is a steel wire, and the fixing member 31 is C-shaped. The splitter plate 3 is connected to the first heat exchange tube 21, the second heat exchange tube 22, and the third heat exchange tube 23 through the C-shaped steel wire.

Preferably, as shown in Figures 2 and 7, the vertical plate portion of the diverter plate 3 is provided with a plurality of through holes arranged horizontally and vertically, so that the flue gas located on the left side of the vertical plate portion flows to the right side of the vertical plate portion through the through holes, and the flue gas located on the right side of the vertical plate portion flows to the left side of the vertical plate portion through the through holes, so as to evenly heat the heat exchange tube 2.

As shown in FIGS. 1 , 2 and 5 , in a preferred embodiment of the present invention, two nuts 4 are further included.

As shown in FIG. 4 , the lower ends of the first “7”-shaped tube 211 and the sixth “7”-shaped tube 232 are both provided with an annular step 2111 and an external thread.

The two nuts 4 are respectively mounted on the lower ends of the first “7”-shaped tube 211 and the sixth “7”-shaped tube 232 , and the nuts 4 and the annular step 2111 clamp the bottom wall of the housing 11 together.

As shown in Figure 3, in a preferred embodiment of the utility model, a groove is opened in the middle of the bottom wall of the first shell, and the condensate interface 115 is located on the bottom wall of the groove. The side wall of the groove is an inclined surface to guide the condensate into the groove to avoid corrosion of the bottom wall of the shell 11 and improve the service life of the shell 1.

As shown in Figures 8 and 9, the utility model also provides a gas water heater, including a smoke exhaust fan 6 and the above-mentioned condensing heat exchanger, the smoke exhaust port of the smoke exhaust fan 6 is connected to the smoke inlet interface 112, and the second shell is located above the smoke duct of the smoke exhaust fan 6, so that the position of the smoke duct of the smoke exhaust fan 6 is staggered with the position of the second shell, thereby reducing the occupied space and there is no need to increase the volume of the outer shell of the gas water heater.

In the embodiments of the present invention, the term "multiple" refers to two or more than two, unless otherwise clearly defined. The terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

In the description of the embodiments of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present invention.

In the description of this specification, the description of the terms "one embodiment", "a preferred embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A condensing heat exchanger, characterized in that it comprises: A housing (1) comprises a shell (11) and a cover (12) fixedly connected to the upper end of the shell (11), the shell (11) comprising a first shell and a second shell, the first shell being connected to the second shell, the first shell, the second shell and the cover (12) together enclosing a cavity (13), a portion of the second shell protruding from a peripheral side wall of the first shell, the first shell being located on a side of the second shell protruding from the first shell and having a smoke inlet interface (112), the lower end of the shell (11) being provided with a first through hole (113), a second through hole (114) and a condensed water interface (115), and the cover (12) being provided with a smoke outlet interface (121); A heat exchange tube (2) is arranged in the cavity (13), and the shape of the heat exchange tube (2) is adapted to the shape of the shell (11), the water inlet end of the heat exchange tube (2) passes through the first through hole (113), and the water outlet end of the heat exchange tube (2) passes through the second through hole (114). 2. The condensing heat exchanger according to claim 1 is characterized in that the heat exchange tube (2) comprises a first heat exchange tube (21), a second heat exchange tube (22) and a third heat exchange tube (23) which are interconnected, the first heat exchange tube (21), the second heat exchange tube (22) and the third heat exchange tube (23) are spaced apart and arranged sequentially from front to back, the first heat exchange tube (21), the second heat exchange tube (22) and the third heat exchange tube (23) are all in the shape of a "7", the lower end of the first heat exchange tube (21) passes through the first through hole (113), and the lower end of the third heat exchange tube (23) passes through the second through hole (114). 3. The condensing heat exchanger according to claim 2 is characterized in that the first heat exchange tube (21) comprises a first "7"-shaped tube (211), a second "7"-shaped tube (212) and a first arc-shaped tube (213) which are interconnected, the first "7"-shaped tube (211), the second "7"-shaped tube (212) and the first arc-shaped tube (213) jointly surround a first "7"-shaped gap (214), and the lower end of the first "7"-shaped tube (211) passes through the first through hole (113). 4. The condensing heat exchanger according to claim 3 is characterized in that the second heat exchange tube (22) comprises a third "7"-shaped tube (221), a fourth "7"-shaped tube (222) and a second arc-shaped tube (223) which are interconnected, the third "7"-shaped tube (221), the fourth "7"-shaped tube (222) and the second arc-shaped tube (223) jointly surround a second "7"-shaped gap, and the lower end of the fourth "7"-shaped tube (222) is connected to the lower end of the second "7"-shaped tube (212). 5. The condensing heat exchanger according to claim 4 is characterized in that the third heat exchange tube (23) comprises a fifth "7"-shaped tube (231), a sixth "7"-shaped tube (232) and a third arc-shaped tube (233) which are interconnected, the fifth "7"-shaped tube (231), the sixth "7"-shaped tube (232) and the third arc-shaped tube (233) jointly surround a third "7"-shaped gap (234), the lower end of the fifth "7"-shaped tube (231) is connected to the lower end of the third "7"-shaped tube (221), and the lower end of the sixth "7"-shaped tube (232) passes through the second through hole (114). 6. The condensing heat exchanger according to claim 5 is characterized in that it also includes a diverter plate (3), the diverter plate (3) is in the shape of a "7", and the diverter plate (3) is arranged in the first "7" shaped gap (214), the second "7" shaped gap and the third "7" shaped gap (234). 7. The condensing heat exchanger according to claim 6 is characterized in that both the transverse portion and the vertical portion of the diverter plate (3) are provided with fixing members (31), and the diverter plate (3) is mounted on the heat exchange tube (2) through the fixing members (31). 8. The condensing heat exchanger according to claim 6 is characterized in that it also includes two nuts (4), and the lower ends of the first "7"-shaped tube (211) and the sixth "7"-shaped tube (232) are both provided with an annular step (2111) and an external thread, and the two nuts (4) are respectively installed on the lower ends of the first "7"-shaped tube (211) and the sixth "7"-shaped tube (232), and the nuts (4) and the annular step (2111) jointly clamp the bottom wall of the shell (11). 9. The condensing heat exchanger according to any one of claims 1-8 is characterized in that a groove is opened in the middle of the bottom wall of the first shell, the condensate interface (115) is located on the bottom wall of the groove, and the side wall of the groove is an inclined surface to guide the condensate into the groove. 10. A gas water heater, characterized in that it comprises a smoke exhaust fan (6) and the condensing heat exchanger according to any one of claims 1 to 9, wherein the smoke exhaust port of the smoke exhaust fan (6) is connected to the smoke inlet interface (112).