CN218511171U

CN218511171U - Gas water heater

Info

Publication number: CN218511171U
Application number: CN202222520469.0U
Authority: CN
Inventors: 吴德忠; 吴叶波; 汤胜军
Original assignee: Jiangsu Yemao Kitchen & Bath Technology Co ltd
Current assignee: Jiangsu Yemao Kitchen & Bath Technology Co ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-02-21
Anticipated expiration: 2032-09-23

Abstract

The utility model relates to a gas water heater belongs to the water heater field, and she includes box, heat exchanger and combustor, and heat exchanger and combustor are located inside the box, the inside combustion chamber that forms of box, combustor are located the combustion chamber bottom, and heat exchanger is located the combustion chamber top, and gas and air warp the combustor distributes and lights and is in the combustion chamber is interior burning, and the high temperature flue gas that the burning produced rises to heat exchanger and is used for heating the water of flowing through heat exchanger, is provided with the stave around the combustion chamber, and the stave has first cooling path and second cooling path, first cooling path form in the outer wall surface of stave, second cooling path form in the inner wall surface of stave, air are driven and flow downwards along first cooling path, and air is driven and upwards flows along second cooling path. The utility model discloses reduced the real-time temperature of parts around the during operation combustion chamber, be favorable to improving the thermal efficiency of water heater to a certain extent simultaneously.

Description

Gas water heater

Technical Field

The utility model relates to a water heater field especially relates to a gas heater.

Background

The gas water heater heats water flowing through the heat exchanger by using high-temperature flue gas generated by gas combustion, so that a combustion chamber is inevitably arranged in the gas water heater, and gas is combusted in the combustion chamber. The improvement of the thermal efficiency of gas combustion means that the heat generated by combustion is used for heat exchange of a heat exchanger as much as possible, but in fact, the thermal efficiency cannot be improved infinitely, in the past, in order to pursue higher thermal efficiency, a design of arranging a thermal insulation layer for a combustion chamber is adopted to reduce heat dissipation, the thermal insulation layer is generally formed by arranging a thermal insulation material such as asbestos on the peripheral wall of the combustion chamber to play a role in thermal insulation, but the temperature of the peripheral wall of the combustion chamber is rapidly increased, and further the material of the peripheral wall is discolored and deformed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve this difficult problem of combustion chamber perisporium temperature height among the gas heater, ensure gas heater's stable in structure and safe in utilization.

The utility model provides a technical scheme that above-mentioned problem adopted does: a gas water heater comprises a box body, a heat exchanger and a burner, wherein the heat exchanger and the burner are positioned in the box body, a combustion chamber is formed in the box body, the burner is positioned at the bottom of the combustion chamber, the heat exchanger is positioned above the combustion chamber, gas and air are distributed and ignited by the burner to be combusted in the combustion chamber, high-temperature smoke generated by combustion rises to the heat exchanger to heat water flowing through the heat exchanger, a cooling wall is arranged around the combustion chamber and provided with a first cooling passage and a second cooling passage, the first cooling passage is formed on the outer wall surface of the cooling wall, the second cooling passage is formed on the inner wall surface of the cooling wall, air is driven to flow downwards along the first cooling passage, and air is driven to flow upwards along the second cooling passage.

As an embodiment of the present application, the second cooling passage is open relative to the combustion chamber, the air flow passing upward along the second cooling passage forms a curtain around the combustion chamber, and the air flowing along the second cooling passage flows upward to the heat exchanger. The air flow in the second cooling passage forms an air curtain, so that direct heat transfer of high-temperature flue gas to the cooling wall can be blocked, the cooling wall is prevented from being heated too fast and too high in temperature, and on the other hand, the existence of the air curtain can promote flames in the combustion chamber to be more concentrated, and particularly the problem that the local temperature of the upper cooling wall is too high due to diffusion of outer flames is solved.

As one of the embodiments of the present application, the first cooling passage communicates with the second cooling passage, and the second cooling passage has an inlet into which air flowing out of the first cooling passage enters. Therefore, the hot air flowing out of the first cooling passage enters the second cooling passage again, the heat is brought back to the combustion chamber again, the loss of the heat is reduced, and the heat efficiency is improved.

Preferably, the cooling wall is provided with a through hole, so that the tail end of the first cooling passage is communicated with the second cooling passage, and the air flowing through the first cooling passage enters the second cooling passage through the through hole.

As one embodiment of the application, the heat insulating plate is arranged at the outer side of the cooling wall at intervals, the first cooling channel is formed between the heat insulating plate and the cooling wall, the heat insulating plate is provided with a primary air hole, the primary air hole is communicated with the first cooling channel, and air is driven to enter the first cooling channel from the primary air hole to form a downward flowing cooling air flow. The flowing air in the first cooling passage can cool the heat insulating plate and the outer surface of the cooling wall at the same time, and the rapid rise of the temperature around the combustion chamber is effectively blocked.

Preferably, the heat insulating plate and/or the stave surface is formed with a convex portion which is convex toward the first cooling passage. The raised portion serves as a gap supporting structure to prevent the first cooling passage from being blocked due to deformation of the heat insulating plate and the cooling wall.

Further, in order to reduce the initial air temperature entering the second cooling passage, an air inducing structure for introducing air into the second cooling passage is arranged at the bottom of the combustion chamber, so that a part of air is supplemented into the second cooling passage, and the cooling effect on the inner surface of the cooling wall is improved.

Preferably, the bottom of the combustion chamber is provided with a secondary air plate, the secondary air plate is used for guiding air to enter the combustor for combustion of gas in the combustion chamber, and the secondary air plate is also used for guiding air to enter the second cooling passage. Specifically, the secondary air plate is provided with a secondary air hole which is communicated with the second cooling passage, and air is driven to enter the first cooling passage from the secondary air hole to form an upward flowing cooling air flow.

As one of the embodiments of the present application, the gas water heater further includes a smoke collecting hood located above the heat exchanger for collecting the smoke flowing through the heat exchanger and the air flowing through the second cooling passage.

As one of the embodiments of the present application, the gas water heater further includes a fan for driving air to enter and flow in the first cooling passage and driving air to enter and flow in the second cooling passage.

Preferably, the fan is an exhaust fan, and the exhaust fan is also used for driving the flue gas in the combustion chamber to reach the heat exchanger upwards.

Compared with the prior art, the utility model has the advantages of: in order to reduce the temperature of components around the combustion chamber and maintain the better use state of the gas water heater, the gas water heater is designed, two cooling passages are formed on the inner surface and the outer surface of the cooling wall around the combustion chamber, air which continuously flows is used as a cooling medium to cool the cooling wall and the heat insulation plate around the combustion chamber, and the air carries heat back to the combustion chamber again and upwards reaches the heat exchanger along the inner surface of the cooling wall.

Drawings

Fig. 1 is a schematic view of the internal structure of a gas water heater according to an embodiment of the present invention;

FIG. 2 is a vertical sectional view of the gas water heater in the width direction according to the embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

FIG. 5 is an enlarged view of the portion C of FIG. 2;

FIG. 6 is a perspective view showing the internal structure of the gas water heater according to the embodiment of the present invention;

FIG. 7 is a schematic structural view of a combustion chamber and its surrounding components in an embodiment of the present invention;

FIG. 8 is a bottom view of the structure shown in FIG. 7;

FIG. 9 is a cross-sectional view of the structure shown in FIG. 7;

in the figure, a smoke exhaust pipe 1, an exhaust fan 2, a smoke collecting hood 3, a box 4, a heat exchanger 5, a combustion chamber 6, a fire grate 7, a cooling wall 8, a boss 9, a primary air hole 10, a secondary air hole 11, a secondary air plate 12, a heat insulation plate 13, a through hole 14, an air guide hole 15, a first cooling passage a and a second cooling passage b.

Detailed Description

The present invention will be described in further detail with reference to the following drawings, which are illustrative and are not to be construed as limiting the present invention. The description of the present embodiment is corresponding to the accompanying drawings, and the description related to the orientation is also based on the description of the accompanying drawings, and should not be construed as limiting the scope of the present invention.

As shown in fig. 1-9, the gas water heater in this embodiment belongs to an upward-pumping gas water heater, which includes a smoke exhaust pipe 1, an exhaust fan 2, a smoke collecting hood 3, a box 4, a heat exchanger 5, a burner composed of a plurality of fire rows 7 arranged in parallel, and the like, wherein a combustion chamber 6 is formed inside the box 1, the burner is located at the bottom of the combustion chamber 6, the heat exchanger 5 is located above the combustion chamber 6, the smoke collecting hood 3 is located above the heat exchanger 5, the exhaust fan 2 is installed on the smoke collecting hood, gas and air are distributed and ignited by the burner to be combusted in the combustion chamber 6, high-temperature smoke generated by combustion rises to the heat exchanger 5 for heating water flowing through the heat exchanger 5, the high-temperature smoke after heat exchange further reaches the smoke collecting hood 3, and is finally discharged to the outside through the smoke exhaust pipe 1.

The periphery of the combustion chamber 6 is provided with a cooling wall 8, the outer side of the cooling wall 8 is further provided with a heat insulation plate 13, and the heat insulation plate 13 is arranged opposite to the cooling wall 8 at a distance, and a first cooling passage a is formed between the two. An array of primary air holes 10 are formed in the upper portion of the heat insulation plate to communicate the first cooling path a with the outside, and the outside air is driven to enter the first cooling path a from the primary air holes 10, thereby forming a downward flowing cooling air flow. A second cooling passage b is formed on the inner surface of the cooling wall, the second cooling passage b is located between the cooling wall and the combustion chamber and is in an open type, air flows upwards along the second cooling passage to the heat exchanger 5 under the driving of the exhaust fan, and air flow flowing along the second cooling passage b forms an air curtain around the combustion chamber to form heat transfer barrier, so that high-temperature smoke of the combustion chamber can be prevented from radiating to the periphery, and the peripheral cooling wall 8 and the heat insulation plate 13 are prevented from being heated too fast and too high in temperature.

The cooling wall 8 is provided with a through hole 14, the through hole 14 is used as a terminal outlet of the first cooling path a and is also used as an inlet for allowing the air flowing out of the first cooling path a to enter the second cooling path b, and the air flowing downwards along the first cooling path a is reversed through the through hole 14 to flow upwards along the inner surface of the cooling wall, so that the carried heat is brought into the combustion chamber again and finally reaches the heat exchanger 5.

The heat insulating plate and/or the stave surface is formed with a boss portion that is raised toward the first cooling passage.

Set up overgrate air board 12 in the combustor bottom, overgrate air board 12 sets up multirow induced air hole 15 for the even entering combustor of guide air is used for realizing the gas burning in the combustion chamber, still sets up overgrate air hole 11 on overgrate air board 12, and overgrate air hole 11's effect is the direct flow direction of guide partly air second cooling path b for to the cooling of stave internal surface. The secondary air holes are arranged at positions which are beneficial to the smooth air entering the second cooling passage b.

This application utilizes air exhauster 2 to take drive air smoothly to get into first cooling path b and second cooling path, realizes the real-time cooling to stave 8 and heat insulating board 13, effectively reduces the temperature of combustion chamber and parts around it, avoids the material high temperature to warp and discolours, maintains the good user state of water heater.

In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A gas water heater, includes box, heat exchanger and combustor are located inside the box, the inside combustion chamber that forms of box, the combustor is located the combustion chamber bottom, and heat exchanger is located the combustion chamber top, and gas and air are through the combustor distributes and ignites and burn in the combustion chamber, and the high temperature flue gas that the burning produced rises to heat exchanger and is used for heating the water that flows through heat exchanger, its characterized in that: a cooling wall is arranged around the combustion chamber, the cooling wall is provided with a first cooling passage and a second cooling passage, the first cooling passage is formed on the outer wall surface of the cooling wall, the second cooling passage is formed on the inner wall surface of the cooling wall, air is driven to flow downwards along the first cooling passage, and air is driven to flow upwards along the second cooling passage.

2. The gas water heater of claim 1, wherein: the second cooling passage is open relative to the combustion chamber, the air flow which flows upwards along the second cooling passage forms an air curtain around the combustion chamber, and the air which flows along the second cooling passage flows upwards to the heat exchanger.

3. The gas water heater of claim 1, wherein: the first cooling passage communicates with the second cooling passage, and the second cooling passage has an inlet into which air flowing out of the first cooling passage enters.

4. The gas water heater of claim 3, wherein: the cooling wall is provided with a through hole, the tail end of the first cooling passage is communicated with the second cooling passage, and air flowing through the first cooling passage enters the second cooling passage through the through hole.

5. The gas water heater of claim 1, wherein: the cooling structure is characterized in that heat insulation plates are arranged on the outer sides of the cooling walls at intervals, a first cooling passage is formed between each heat insulation plate and the corresponding cooling wall, a primary air hole is formed in each heat insulation plate and communicated with the corresponding first cooling passage, and air is driven to enter the corresponding first cooling passage from the corresponding primary air hole to form a downward flowing cooling air flow.

6. The gas water heater of claim 5, wherein: the heat insulating plate and/or the stave surface is formed with a convex portion which is convex toward the first cooling passage.

7. The gas water heater of claim 1, wherein: and an air inducing structure for introducing air into the second cooling passage is arranged at the bottom of the combustion chamber.

8. The gas water heater of claim 7, wherein: and a secondary air plate is arranged at the bottom of the combustion chamber and used for guiding air to enter the combustor for combustion of fuel gas in the combustion chamber, and the secondary air plate is also used for guiding air to enter the second cooling passage.

9. The gas water heater of claim 8, wherein: and secondary air holes are formed in the secondary air plate and communicated with the second cooling passage, and air is driven to enter the first cooling passage from the secondary air holes to form an upward flowing cooling air flow.

10. The gas water heater of claim 1, wherein: a smoke collection hood is also included above the heat exchanger for collecting the flue gas flowing through the heat exchanger and the air flowing through the second cooling passage.

11. The gas water heater of claim 1, wherein: also included is a fan for driving air into and through the first cooling passage and for driving air into and through the second cooling passage.

12. The gas water heater of claim 11, wherein: the fan is an exhaust fan, and the exhaust fan is also used for driving smoke in the combustion chamber to upwards reach the heat exchanger.