CN211977242U - Gas hot water equipment - Google Patents

Abstract

The utility model provides a gas hot water equipment, it includes shell, combustor, absorbs the heat that the combustor produced and give the heat transfer for the heat exchanger of rivers through it and collect the produced flue gas of burning and with its exhaust fume extractor. The fume extractor comprises a fume collecting hood and a guide plate. Through setting up the guide plate in collection petticoat pipe bottom to set up different smoke inlets on the guide plate, come the equilibrium because the irregular configuration of collection petticoat pipe and the amount of wind maldistribution that causes, thereby make the combustion state homogeneous of the flame that each fire row top of combustor formed, and then ensure that the burning is abundant, effectively reduce the emission of carbon monoxide in the flue gas.

Description

Gas hot water equipment

technical field

The utility model relates to the field of hot water preparation, in particular to a gas-fired hot water device.

Background technique

Gas hot water equipment usually includes gas water heaters and gas boilers. Taking a gas water heater as an example, a burner, a heat exchanger, and a piping system are usually arranged in it. The burner often includes several fins arranged side by side, and each fin has a gas-air mixing channel. The gas is injected into the fire exhaust sheet through the gas proportional valve and through the gas distributor, and the gas and air are mixed in the mixing channel of the fire exhaust sheet and transferred to the fire hole located at the top of the fire exhaust sheet to burn in the combustion chamber and generate heat. The heat of the heat exchanger can heat the water in the heat exchanger, and then the heated water can be output through the pipeline system to be used for the supply of domestic hot water such as drinking and bathing. In addition to providing domestic hot water, the gas boiler can also be connected to the radiator installed in the room to provide the function of central heating.

Fans and fume hoods are usually installed in gas-fired hot water equipment. The fan is used to supply the air required for combustion to the burner, and discharge the waste flue gas generated by the combustion through the fume collecting hood. For updraft gas hot water equipment, the fan is installed above the heat exchanger together with the fume hood. The fume collecting hood is generally L-shaped with a horizontal longitudinal portion and a vertical portion perpendicular to the longitudinal portion. The fan is arranged in the angle space between the longitudinal part and the vertical part of the fume collecting hood. The vertical part of the fume collecting hood is provided with a smoke outlet, which is opposite to the air inlet of the fan, so that under the suction effect of the fan , the flue gas enters from the bottom of the fume collecting hood, and enters the fan through the side smoke outlet of the vertical part and is finally discharged. The asymmetric structure of the fume collecting hood and the position of the smoke outlet lead to uneven distribution of the air volume on the bottom plane of the fume collecting hood. For example, on the side where the air volume is relatively concentrated, the flame formed on the burner tends to leave the flame, while on the side where the air volume is insufficient, the flame formed on the burner tends to produce a yellow flame. Obviously, all of the above situations will lead to a significant increase in the emission of carbon monoxide, thereby causing pollution to the environment.

In view of this, it is necessary to transform the existing gas hot water equipment to solve the above problems.

Utility model content

The purpose of the present utility model is to provide a gas-fired hot water equipment, which has an improved smoke exhaust device to balance the air volume, thereby making the combustion more sufficient and effectively reducing the emission of carbon monoxide in the flue gas.

The purpose of this utility model is to provide a gas-fired hot water equipment, which includes a casing, a burner, a heat exchanger that absorbs heat generated by the burner and transfers the heat to a water flow passing therethrough, and collects flue gas generated by combustion and A fume extractor that ejects it. The smoke exhaust device includes a smoke collecting hood and a deflector. The fume collecting hood is located above the burner and the heat exchanger, it has a longitudinal part extending along the longitudinal direction and a vertical part connecting with the longitudinal part and extending vertically, the fume collecting hood is open at the bottom, and the vertical part of the fume collecting hood is connected to the vertical part. A smoke outlet is provided on the side walls connected by the longitudinal parts. The deflector is fixedly installed at the bottom opening of the fume collecting hood, and a plurality of smoke inlets are opened on it, wherein the smoke inlet area formed by the plurality of smoke inlets in the area facing the longitudinal part of the deflector is larger than that in the deflector. The smoke intake area formed in the area of the plate facing the vertical part.

As a further improvement of the present invention, the smoke inlet area formed by the plurality of smoke inlets is larger than the area of the smoke outlet.

As a further improvement of the present invention, a plurality of smoke inlets are evenly distributed on the baffle at intervals, and the size of the smoke inlets located in the area facing the longitudinal part of the baffle is larger than that of the smoke inlet located in the area facing the vertical part of the baffle. The size of the smoke inlet in the area of the section.

As a further improvement of the present invention, a plurality of smoke inlets are unevenly distributed on the baffle.

As a further improvement of the present invention, one of the several smoke inlets has a longitudinally extending portion and a transversely extending portion perpendicular to the longitudinal direction.

As a further improvement of the present invention, the longitudinally extending portion of the smoke inlet is located in the area of the deflector facing the longitudinal portion.

As a further improvement of the present invention, the parts of the plurality of smoke inlets in the area of the deflector facing the longitudinal part are distributed on the opposite side from the smoke outlet in the transverse direction perpendicular to the longitudinal direction.

Compared with the prior art, the beneficial effect of the present utility model is: by arranging a baffle plate at the bottom of the fume collecting hood, and setting different smoke inlets on the baffle plate, it can balance the irregular configuration of the fume collecting hood. As a result, the air volume distribution is uneven, so that the combustion state of the flame formed at the top of each fire row of the burner is uniform, thereby ensuring sufficient combustion and effectively reducing the emission of carbon monoxide in the flue gas.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. The accompanying drawings of the utility model are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

Fig. 1 is the three-dimensional schematic diagram of the gas-fired hot water equipment of the present invention in a specific embodiment;

FIG. 2 is a schematic plan view of the gas-fired hot water equipment shown in FIG. 1 after removing part of the shell panel;

3 is a schematic plan view of the gas supply assembly of the gas-fired water heater shown in FIG. 2;

FIG. 4 is a perspective view of the gas distribution frame of the gas supply assembly shown in FIG. 3;

FIG. 5 is a perspective view of the gas distributor shown in FIG. 4 from another perspective;

Fig. 6 is the cross-sectional schematic diagram of the gas distributor shown in Fig. 4;

FIG. 7 is a schematic perspective view of the segment valve of the gas supply assembly shown in FIG. 3;

FIG. 8 is a schematic perspective view of the smoke exhaust device of the gas-fired hot water equipment shown in FIG. 2;

Fig. 9 is a plan view of the deflector of the smoke exhaust device shown in Fig. 8;

Fig. 10 is similar to Fig. 8, which shows a three-dimensional schematic diagram of a smoke exhaust device in another specific embodiment;

Fig. 11 is a plan view of the deflector of the smoke exhaust device shown in Fig. 10;

FIG. 12 is a left side view of the smoke exhaust device shown in FIG. 10 .

Detailed ways

The present invention will be described in detail below with reference to the various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and structural, method, or functional transformations made by those of ordinary skill in the art according to these embodiments are all included within the protection scope of the present invention.

Gas hot water equipment can be fueled by combustible gas, such as natural gas, city gas, liquefied gas, biogas, etc., by burning combustible gas to heat water to meet the needs of users for domestic water, gas water heaters can also be used for central heating. boiler. The utility model is described in detail below by taking the gas water heater as an example.

Referring to FIG. 1 and FIG. 2, a specific embodiment of the gas water heater of the present invention is shown. The gas water heater 100 includes a casing 10, a burner 31, a heat exchanger 32, a smoke exhaust device 40, a fan (not shown), and a gas supply component for controlling the gas supply to the burner and the like, which are accommodated in the casing 10.

In this embodiment, the housing 10 is substantially in the shape of a rectangular parallelepiped, which can be formed by splicing several panels. The burner 31 includes a burner unit arranged in a burner housing, which in this embodiment is a plurality of fire-arranging fins arranged side by side. A gas-air mixing channel is provided on each fire extinguisher, and the gas and air supplied by the gas supply assembly are mixed in the mixing channel and transferred to the fire holes on the top of the fire extinguisher to burn and generate heat. In this embodiment, in order to reduce the emission of nitrogen oxides, the burner adopts a water-cooling method, that is, a water pipe passes through the head of each fire discharge piece to reduce the flame temperature, thereby reducing the emission of nitrogen oxides. The heat exchanger 32 is installed above the burner 31, and a combustion chamber is defined between it and the burner. The heat exchanger 32 may be a fin-and-tube heat exchanger, that is, the heat exchanger includes a plurality of fins through which a water absorption pipe is detoured. The water pipe protrudes from the bottom of the casing 10 to form a water inlet 11 and a water outlet 12 . The gas-air mixture is burned in the combustion chamber, and the heat generated is absorbed by the fins and further transferred to the water flowing in from the water inlet 11 and flowing through the hot water suction pipe, and the heated water is discharged through the water outlet 12, thereby The user provides water for heating and/or domestic use.

Referring to FIG. 3 to FIG. 7 , the gas supply assembly is disposed below the burner 31 , and includes a gas proportional valve 21 , a segment valve 22 , and a gas distribution frame 23 . The gas proportional valve 21 is communicated with the external gas pipeline 13 and can be connected to a control circuit board (not shown) to be controlled by adjusting the valve opening degree to control the amount of gas supplied to the burner 31 . The air distribution frame 23 is elongated and extended, and includes a main body, a plurality of air inlets formed on the main body, and a plurality of air outlets 232 disposed on the main body and facing the burner 31 . In this embodiment, several air outlets 232 are arranged in two longitudinal rows, because there are two gas and air inlets for each fire row, so in other embodiments, if each fire row has only one gas and air inlet , the air outlet 232 only needs to be arranged in one row. The air inlet is provided on the opposite side of the air outlet 232 . Referring to FIG. 6 , a partition plate 234 is provided in the main body of the air distribution frame to divide the space in the air distribution frame into a first cavity 2331 and a second cavity 2332 which are isolated from each other in the longitudinal direction. Correspondingly, the plurality of air inlets can be divided into a first air inlet 2311 communicating with the first cavity 2331, and a second air inlet 2312 communicating with the second cavity 2332; the plurality of air outlets 232 can also be divided into A first part of the air outlet communicated with the cavity 2331 , and a second part of the air outlet communicated with the second cavity 2332 . In this embodiment, the number of the first part of the gas outlet is smaller than the number of the second part of the gas outlet, so as to realize the combustion with a smaller load. Of course, in other embodiments, the air sub-frame can be divided into more segments as needed.

Referring to FIG. 7 , the segment valve 22 includes a valve body disposed between the gas proportional valve 21 and the gas sub-rack 23 , and the valve body includes a first valve portion 221 , a second valve portion 222 , and a valve body connected to the first valve portion 221 . The bridge portion 223 between the valve portion and the second valve portion. A first valve hole 2211 communicated with the first air inlet 2311 is formed through the first valve portion 221 , and a second valve hole 2221 communicated with the second air inlet 2312 is formed through the second valve portion 222 . The first valve hole 2211 and the second valve hole 2221 communicate with each other through the bridge portion 223 . The gas proportional valve 21 is connected to the bottom of the first valve part 221 of the segment valve through the gas pipeline, and an electric control device 224 is installed at the bottom of the second valve part 222. The control circuit board is connected to be controllable to selectively open or close the second valve hole 2221 . Corresponding to the two exhaust ports 232 , there are two first intake ports 2311 and two second intake ports 2312 , which correspond to the two exhaust ports respectively. The top of the first valve part 221 is provided with a first boss 2212, and a hollow area is formed in the middle. When the segmented valve 22 is installed on the air distribution frame 23, the hollow area of the first boss 2212 covers the two first air inlets 2311, thereby ensuring that the first valve hole 2211 communicates with the first air inlet (2311). Similarly, the top of the second valve part 222 is provided with a second boss 2222, and a hollow area is formed in the middle. When the segmented valve 22 is installed on the air distributor 23, the hollow area of the second boss 2222 covers the two second bosses 2222. The air inlet 2312 ensures that the second valve hole 2221 communicates with the second air inlet 2312 .

When lower load combustion is required, the second valve hole 2221 of the segment valve 22 is blocked, so that the gas passes through the gas proportional valve 21, the first valve hole 2211 of the segment valve, the first air inlet 2311, the first The cavity 2331 is then ejected from the first part of the air outlet, and enters the corresponding part of the fire exhaust sheet together with the air, and is mixed and burned. When full-load combustion is required, the second valve hole 2221 of the segment valve 20 is opened, so that the gas enters the segment valve 22 through the gas proportional valve 21; on the one hand, the gas passes through the first valve hole 2211 of the segment valve and is Part of the gas enters the first cavity 2331 of the gas distribution frame through the first air inlet 2311; on the other hand, the part of the gas passing through the first valve hole 2211 of the segment valve will be branched through the bridge 223 to reach the second valve hole 2221, and then Enter the second cavity 2332 of the air distributor through the second air inlet 2221 . That is to say, the gas will be ejected from all the gas outlets 232 and enter all the fire exhaust fins, so as to achieve full power combustion.

Since a segmented valve is set between the gas proportional valve and the gas sub-rack, the gas proportional valve with the simplest structure can be used, and the structure of the segmented valve is also simple, so that the overall design and manufacturing difficulty of the gas supply assembly are equal. Greatly reduced and easy to implement.

Referring to FIGS. 8 and 9 , the fume exhaust device 40 is used to collect the flue gas (exhaust gas containing carbon monoxide, nitrogen oxides, etc.) generated by combustion and discharge it to the outside, and includes a fume collecting hood 41 and a deflector 42 . The fume collecting hood 41 is located above the burner 31 and the heat exchanger 32, and has a longitudinal portion 411 extending in the longitudinal direction (X-axis direction), and a vertical portion connected with the longitudinal portion and extending in the vertical direction (Z-axis direction). 412. The bottom of the smoke collecting hood 41 is open, and the side wall of the vertical part 412 of the smoke collecting hood connected with the longitudinal part 411 is provided with a smoke outlet 43 . The fan is usually arranged in the space between the longitudinal part 411 and the vertical part 412 of the fume collecting hood, which can be a centrifugal fan, that is, the gas enters from the axial direction of the fan, and then changes to the radial direction when passing through the high-speed rotating impeller, Subsequent deceleration converts kinetic energy into pressure energy, which drives the flow of flue gas. The axial air inlet of the fan is directly opposite to the smoke outlet 43 of the fume collecting hood. Obviously, when the fan is working, the air volume formed in the vertical portion 412 is relatively large, while the air volume formed in the longitudinal portion is relatively small. Due to the uneven air volume, the combustion states of the flames formed at the tops of the burners are inconsistent, which in turn leads to insufficient combustion.

The deflector 42 is fixedly installed at the bottom opening of the smoke collecting hood 41, and a number of smoke inlets 421 and 422 are opened on it. First of all, it is necessary to ensure that the smoke inlet area formed by the plurality of smoke inlet ports 421 and 422 is larger than the area of the smoke outlet port 43, so as not to reduce the total air volume of the fan due to the introduction of the deflector. In addition, in order to ensure the same combustion state of the flames formed at the tops of the burners, it is necessary to make the distribution of the air volume entering at the bottom of the fume collecting hood 41 uniform and consistent, so as to balance the air volume by setting the smoke inlets on the baffle plate 42 , the general requirement is that the smoke intake area formed by the plurality of smoke inlets 421 and 422 in the area of the deflector 42 facing the longitudinal portion 411 is larger than that formed in the area of the deflector 42 facing the vertical portion 412 smoke intake area. Referring to FIG. 9 , in this embodiment, a plurality of smoke inlets are evenly distributed on the baffle 42 at intervals, but the size of the smoke inlets 421 located in the area of the baffle 42 facing the longitudinal portion 411 is larger than The size of the smoke inlet 422 in the area of the deflector 42 directly opposite the vertical portion 412 .

Figures 10 to 12 show another specific embodiment. In this embodiment, the fume exhaust device 50 also includes a fume collecting hood 51 and a deflector 52; the fume collecting hood 51 has basically the same structure as the above-mentioned embodiment, and also includes a longitudinal portion 511, a vertical portion 512, and a vertical portion 512 A smoke outlet 53 is opened on the side wall of the . Referring to FIG. 12 , the smoke outlet 53 is close to one end of the side wall in the transverse direction (Y-axis direction) perpendicular to the longitudinal direction. The main difference from the above-mentioned embodiment is that several smoke inlets 521 and 522 are distributed on the deflector 52 non-uniformly. One of the several smoke inlets 521 has a longitudinally extending portion 5211 and a transversely extending portion 5212 . The longitudinally extending portion 5211 of the aforementioned smoke inlet 521 is located in an area of the deflector 52 facing the longitudinal portion 511 . Similarly, the smoke intake area (the longitudinal extension 5211 of the smoke inlet 521 ) formed by the plurality of smoke inlets 521 , 522 in the area of the air deflector 52 facing the longitudinal portion 511 is larger than the area directly opposite to the air deflector 52 . The smoke intake area formed in the area of the vertical portion 512 . In addition, the portion of the several smoke inlets 521, 522 in the area of the deflector 52 facing the longitudinal portion 511 (ie, 5211) is laterally distributed opposite to the above-mentioned smoke outlet 53, that is, the longitudinal extension of the smoke inlet 521 The part 5211 is disposed away from the smoke outlet 53 in the lateral direction (Y-axis direction), so that the air volume in the bottom area of the longitudinal part 511 of the fume collecting hood can be further balanced, and the air volume in the lateral direction will not be caused by the deviated arrangement of the smoke outlet 53. The air volume distribution is uneven.

By arranging a baffle at the bottom of the fume collecting hood and setting different smoke inlets on the baffle, the uneven distribution of air volume caused by the irregular configuration of the fume collecting hood can be balanced, so that each fire exhaust of the burner can be eliminated. The combustion state of the flame formed at the top is uniform, thereby ensuring sufficient combustion and effectively reducing the emission of carbon monoxide in the flue gas.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes within the meaning and range of the required equivalents are embraced within the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (7)

1. A gas-fired hot water appliance comprising a casing, a burner, a heat exchanger that absorbs heat generated by the burner and transfers the heat to a water flow passing therethrough, and an exhaust that collects and discharges flue gas generated by combustion. A smoke device; characterized in that, the smoke exhaust device comprises: A fume collecting hood, located above the burner and the heat exchanger, has a longitudinal portion extending along the longitudinal direction and a vertical portion connecting with the longitudinal portion and extending vertically, the fume collecting hood is open at the bottom, and the fume collecting hood is open at the bottom. A smoke outlet is provided on the side wall of the vertical part of the cover connected with the longitudinal part; The deflector is fixedly installed at the bottom opening of the fume collecting hood, and a plurality of smoke inlets are opened on it, wherein the smoke inlet area formed by the plurality of smoke inlets in the area facing the longitudinal part of the deflector is larger than that of the air deflector. The smoke intake area formed in the area of the deflector facing the vertical part. 2 . The gas-fired water heater according to claim 1 , wherein the smoke inlet area formed by the plurality of smoke inlets is larger than the area of the smoke outlet. 3 . 3 . The gas-fired hot water equipment according to claim 1 , wherein the plurality of smoke inlets are evenly spaced on the deflector, and the smoke inlets are located in the area of the deflector facing the longitudinal portion. 4 . The size of the port is larger than the size of the smoke inlet located in the area of the deflector directly opposite the vertical portion. 4 . The gas-fired water heater according to claim 1 , wherein the plurality of smoke inlets are non-uniformly distributed on the baffle. 5 . 5 . The gas-fired water heater according to claim 4 , wherein one of the plurality of smoke inlets has a longitudinally extending portion and a laterally extending portion perpendicular to the longitudinal direction. 6 . 6 . The gas-fired water heater according to claim 5 , wherein the longitudinally extending portion of the smoke inlet is located in an area of the deflector facing the longitudinal portion. 7 . 7 . The gas-fired hot water equipment according to claim 1 , wherein the parts of the plurality of smoke inlets in the area of the deflector facing the longitudinal part, in the transverse direction perpendicular to the longitudinal direction, and the The smoke outlets are distributed on opposite sides.

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