CN108006942B

CN108006942B - Gas water heater

Info

Publication number: CN108006942B
Application number: CN201611205490.4A
Authority: CN
Inventors: 梁国荣; 张小林; 梁泽锋
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2016-12-23
Filing date: 2016-12-23
Publication date: 2024-01-30
Anticipated expiration: 2036-12-23
Also published as: CN108006942A

Abstract

The invention discloses a gas water heater, which comprises: a heat exchange system; a combustion system for heating the heat exchange system, the combustion system having a plurality of fire rows; the smoke exhaust system is used for exhausting smoke generated by the combustion system and comprises a transverse smoke collecting hood for rectifying the smoke and a smoke exhaust fan for guiding the smoke in the transverse smoke collecting hood to be exhausted, the length direction of the transverse smoke collecting hood extends along the left-right direction so as to span all fire rows of the combustion system, and the smoke exhaust fan is mounted on the transverse smoke collecting hood. The gas water heater provided by the embodiment of the invention has the advantages of smooth and uniform smoke emission, small pressure loss and the like.

Description

Gas water heater

Technical Field

The invention relates to the technical field of electric appliance manufacturing, in particular to a gas water heater.

Background

In the strong pumping gas water heater in the related art, the fume collecting hood is generally longitudinally provided with a plurality of elbows, the flow of the fume in the fume collecting hood is longer, the flow of the fume is blocked, the pressure loss is larger, and the uniformity of the fume emission is affected.

Disclosure of Invention

The present invention aims to solve at least one of the above-mentioned technical problems in the related art to some extent. Therefore, the invention provides the gas water heater which has the advantages of smooth and uniform smoke emission, small pressure loss and the like.

To achieve the above object, according to an embodiment of the present invention, there is provided a gas water heater including: a heat exchange system; a combustion system for heating the heat exchange system, the combustion system having a plurality of fire rows; the smoke exhaust system is used for exhausting smoke generated by the combustion system and comprises a transverse smoke collecting hood for rectifying the smoke and a smoke exhaust fan for guiding the smoke in the transverse smoke collecting hood to be exhausted, the length direction of the transverse smoke collecting hood extends along the left-right direction so as to span all fire rows of the combustion system, and the smoke exhaust fan is mounted on the transverse smoke collecting hood.

The gas water heater provided by the embodiment of the invention has the advantages of smooth and uniform smoke emission, small pressure loss and the like.

In addition, the gas water heater according to the embodiment of the invention can also have the following additional technical characteristics:

according to one embodiment of the present invention, the smoke exhaust fan includes: the shell is provided with a smoke inlet, a cooling air inlet and a smoke outlet, wherein the smoke inlet faces the inside of the transverse smoke collecting hood, and the cooling air inlet faces the outside of the transverse smoke collecting hood; the impeller is rotatably arranged in the shell, two end surfaces of the impeller respectively form a smoke suction opening facing the smoke inlet and a suction opening facing the cooling air inlet, and the outer circumferential surface of the impeller forms a wind supply opening facing the smoke outlet; the baffle is arranged in the impeller and separates the smoking opening from the air suction opening; and the motor is arranged on the shell and positioned at the cooling air inlet, and is in transmission connection with the impeller.

According to one embodiment of the invention, the ratio of the outer diameter R0 of the partition to the outer diameter R1 of the impeller is 1/3-1.

According to one embodiment of the invention, the cooling air inlet is an inner flanging hole, the difference between the radius of the cooling air inlet and the maximum radius of the outer contour of the motor is a first pumping force adjusting value A with adjustable size, and the distance between the motor and the inner end surface of the cooling air inlet in the axial direction is a second pumping force adjusting value B with adjustable size.

According to one embodiment of the invention, the distance between the partition and the suction opening in the axial direction of the impeller is greater than the distance between the partition and the suction opening.

According to one embodiment of the invention, the relative position of the diaphragm and the impeller is fixed for rotation with the impeller.

According to one embodiment of the invention, the casing is provided with a volute structure, the flue gas inlet and the cooling air inlet are respectively arranged on two end faces of the casing, and the opening of the flue gas outlet faces upwards.

According to one embodiment of the invention, the distance between the impeller and the casing increases gradually in the circumferential direction of the casing in the direction of the flue gas outlet.

According to one embodiment of the invention, the motor is located outside the casing and a motor shaft of the motor extends into the cooling air inlet to be in transmission connection with the impeller.

According to one embodiment of the invention, the gas water heater further comprises: the combustion heat exchange cavity, the heat exchange system and the combustion system are arranged in the combustion heat exchange cavity, and the transverse smoke collecting hood is arranged at the top of the combustion heat exchange cavity.

Drawings

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

Fig. 2 is a longitudinal cross-sectional view of a smoke evacuation system of a gas water heater according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view in a width direction of a smoke exhaust system of a gas water heater according to an embodiment of the present invention.

Fig. 4 is a schematic view of the impeller and the partition plate of the smoke exhaust fan of the gas water heater according to the embodiment of the invention.

Reference numerals:

a gas water heater 1,

Heat exchange system 10, combustion system 20, smoke evacuation system 30, combustion heat exchange cavity 40,

A transverse smoke collecting hood 100,

A smoke exhaust fan 200,

A casing 210, a flue gas inlet 211, a cooling air inlet 212, a flue gas outlet 213,

Impeller 220, smoke suction port 221, air suction port 222, air supply port 223,

A separator 230,

Motor 240, motor shaft 241.

Detailed Description

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

The gas water heater 1 according to the embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the gas water heater 1 according to the embodiment of the present invention includes a heat exchanging system 10, a combustion system 20, and a smoke exhausting system 30.

The combustion system 20 is used to heat the heat exchange system 10, the combustion system 20 having a plurality of fire rows. The smoke exhaust system 30 is used for exhausting smoke generated by the combustion system 20, and the smoke exhaust system 30 comprises a transverse smoke collecting hood 100 and a smoke exhaust fan 200. The lateral fume collection hood 100 is used to rectify the fume. The smoke exhaust fan 200 is used for guiding smoke in the lateral smoke collecting hood 100 to be exhausted, the length direction of the lateral smoke collecting hood 100 extends along the left-right direction, in other words, the lateral smoke collecting hood 100 is horizontally arranged, the lateral smoke collecting hood 100 spans all fire exhaust of the combustion system 20, and the smoke exhaust fan 200 is mounted on the lateral smoke collecting hood 100.

It should be understood that, in the related art, the fume collecting hood longitudinally arranged means that the length direction of the fume collecting hood extends along the front-rear direction, for example, the length direction of the fume collecting hood is perpendicular to the front panel with reference to the front panel of the water heater, and in the present application, the transverse fume collecting hood 100 is transversely arranged, that is, the length direction of the transverse fume collecting hood 100 is parallel to the front panel.

According to the gas water heater 1 provided by the embodiment of the invention, by arranging the horizontal fume collecting hood 100 horizontally arranged, and enabling the horizontal fume collecting hood 100 to cross all fire rows of the combustion system 20, all the fume generated after the natural gas is combusted can be uniformly collected, the flow of the fume in the discharge process is shortened, the number and the angle of the elbows are reduced, so that the pressure loss of the air passage is greatly reduced, and the fume is smoother in the discharge process.

Therefore, the gas water heater 1 provided by the embodiment of the invention has the advantages of smooth and uniform smoke emission, small pressure loss and the like.

The gas water heater 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

In some embodiments of the present invention, as shown in fig. 2-4, the smoke exhaust fan 200 includes a housing 210, an impeller 220, a partition 230, and a motor 240.

The casing 210 is provided with a smoke outlet 213, a cooling air inlet 212 and a smoke outlet 213, the casing 210 is arranged on the transverse smoke collecting hood 100, the smoke inlet 211 faces the interior of the transverse smoke collecting hood 100, and the cooling air inlet 212 faces the exterior of the transverse smoke collecting hood 100. The impeller 220 is rotatably disposed in the casing 210, and both end surfaces of the impeller 220 respectively form a smoke suction port 221 facing the smoke inlet 211 and a suction port 222 facing the cooling air inlet 212, and an outer peripheral surface of the impeller 220 forms a wind supply port 223 facing the smoke outlet 213, in other words, the impeller 220 is a double suction impeller. A partition 230 is provided within the impeller 220 and separates the suction inlet 221 from the suction inlet 222. A motor 240 is mounted on the housing 210 at the cooling air inlet 212 such that the motor 240 and the air suction opening 221 are separated by a partition 230, and the motor 240 is drivingly connected to the impeller 220 for driving the impeller 220 to rotate.

The operation of the smoke exhaust fan 200 is described below with reference to the accompanying drawings.

The motor 240 is operated to drive the impeller 220 to rotate, the impeller 220 rotates to suck air, high-temperature flue gas in the transverse smoke collecting hood 100 is sucked by the smoke suction opening 221 through the flue gas inlet 211, ambient cold air is sucked by the air suction opening 222 through the cooling air inlet 212 and passes through the motor 240 in the sucked process, so that the motor 240 and a motor shaft 241 thereof are cooled, and the sucked high-temperature flue gas and the ambient cold air are sent to the flue gas outlet 213 through the air supply opening 223 and are discharged in a mixed mode. Wherein, the baffle 230 is disposed between the smoke suction port 221 and the air suction port 222, and the high temperature smoke is blocked by the baffle 230 from contacting the motor 240 and the motor shaft 241 thereof after entering from the smoke inlet 211.

Therefore, by arranging the impeller 220 with the smoke suction port 221 and the air suction port 222, by utilizing the double-suction principle, one side sucks smoke to guide the smoke to be discharged, and the other side sucks ambient cold air to cool the motor 240 and the motor shaft 241 thereof, so that forced smoke discharge can be realized, cooling of the motor 240 can be realized, and an additional cooling fan is not required, thereby simplifying the structure and reducing the cost. And, through setting up baffle 230 in impeller 220, realize motor 240 and high temperature flue gas's isolation, reduce the direct heating of high temperature flue gas to motor 240, reach the purpose of cooling, further improved the cooling effect to motor 240. Furthermore, the transverse arrangement of the transverse smoke collecting hood 100 is convenient, and the arrangement mode of the transverse smoke collecting hood 100 is combined, so that the smoke emission is smooth and uniform, and the pressure loss is small.

It should be understood by those skilled in the art that fig. 3 shows an example in which the smoke exhaust fan 200 is directed to the rear, but the present invention is not limited thereto, and the smoke exhaust fan 200 may be disposed to the front.

Optionally, as shown in fig. 2, the partition 230 is a circular plate adapted to the shape of the impeller 220, and the ratio of the outer diameter R0 of the partition 230 to the outer diameter R1 of the impeller 220 is 1/3-1, so that the isolation effect on high-temperature flue gas can be further improved, the temperature rise of the motor 240 can be reduced, and the structural size of the smoke exhaust fan 200 can be reduced.

Further, as shown in fig. 3, the cooling air inlet 212 is an inner flanging hole, the difference between the radius of the cooling air inlet 212 and the maximum radius of the outer contour of the motor 240 is a first pumping force adjustment value a with adjustable size, and the distance between the motor 240 in the axial direction of the motor 240 and the inner end surface of the inner flanging of the cooling air inlet 212 is a second pumping force adjustment value B with adjustable size.

The difference between the radius of the cooling air inlet 212 and the maximum radius of the outer contour of the motor 240 is set to be a first pumping force adjusting value A with adjustable size, and the distance between the motor 240 and the cooling air inlet 212 in the axial direction of the motor 240 is set to be a second pumping force adjusting value B with adjustable size, so that the magnitude of pumping force of ambient cold air can be controlled by jointly controlling the magnitude of the first pumping force adjusting value A and the second pumping force adjusting value B, and the air inflow of the ambient cold air can be controlled.

Specifically, the first draft adjustment value a is positive, indicating that the radius of the cooling air inlet 212 is greater than the maximum radius of the outer profile of the motor 240; when the first draft adjustment value a is negative, it indicates that the maximum radius of the outer profile of the motor 240 is greater than the radius of the cooling air inlet 212.

The second draft adjustment value B is positive, indicating that the motor 240 is located outside the housing 210; when the second draft adjustment value B is negative, it indicates that the motor 240 is located inside the housing 210.

When the first pumping force adjusting value A is negative, the second pumping force adjusting value B can be positive only, and the magnitude of the cooling air pumping force is controlled by adjusting the magnitude of the second pumping force adjusting value B.

When the first pumping force regulating value A is positive, the second pumping force regulating value B can be positive or negative, and the magnitude of the cooling air pumping force is controlled by regulating the magnitude of the first pumping force regulating value A.

In some embodiments of the present invention, the relative positions of the baffle 230 and the impeller 220 are fixed, i.e., the baffle 230 is fixedly installed in the impeller 220, so that the baffle 230 rotates with the impeller 220, thereby ensuring the stability of the impeller 220 and the baffle 230, and thus ensuring the isolation effect of the baffle 230 against high temperature flue gas.

Advantageously, as shown in fig. 3 and 4, the distance between the partition 230 and the suction port 221 in the axial direction of the impeller 220 is greater than the distance between the partition 230 and the suction port 222, that is, the partition 230 is located further adjacent to the suction port 222 than the suction port 221. This can ensure the discharge efficiency and the discharge amount of the smoke while ensuring the cooling effect of the ambient cold air on the motor 240.

Fig. 3 shows an example that the motor 240 is located outside the casing 210, and a motor shaft 241 of the motor 240 extends into the cooling air inlet 212 to be in driving connection with the impeller 220, and when the motor 240 operates, all the ambient cold air sucked in by the cooling air inlet 212 passes through the motor 240 and the motor shaft 241 thereof, thereby improving the cooling effect of the ambient cold air on the motor 240 and the motor shaft 241 thereof.

In some embodiments of the present invention, as shown in fig. 2, the casing 210 has a volute structure, i.e., the casing 210 is substantially shaped like a snail shell, the flue gas inlet 211 is disposed on one end surface of the casing 210 and corresponds to the position of the smoke suction port 221, the cooling air inlet 212 is disposed on the other end surface of the casing 210 and corresponds to the position of the air suction port 222, and the opening of the flue gas outlet 213 is upward. Thereby, the high-temperature flue gas can be conveniently sucked into the flue gas inlet 211, the cooling air inlet 212 can conveniently suck the ambient cold air, the installation of the smoke exhaust fan 200 and the isolation of the high-temperature flue gas and the motor 240 are facilitated, and the sucked high-temperature flue gas and the ambient cold air can be smoothly discharged from the flue gas outlet 213.

Further, as shown in fig. 2, the distance between the outer circumferential surface of the impeller 220 and the inner circumferential surface of the casing 210 gradually increases in the circumferential direction of the casing 210 toward the smoke outlet 213, and the impeller 220 is located adjacent to one side of the inner circumferential surface of the casing 210 at the smoke outlet 213 and away from the other side of the inner circumferential surface of the casing 210 at the smoke outlet 213. The sucked high-temperature flue gas and ambient cold air are sent out to the casing 210 by the outer peripheral surface of the impeller 220, and move along the circumferential direction of the casing 210 under the guidance of the inner peripheral surface of the casing 210, and finally are discharged by the flue gas outlet 213, the interval between the impeller 220 and the casing 210 is set to combine the air distribution of the high-temperature flue gas and the ambient cold air in the whole discharging process, namely, the interval between the small part of the air quantity and the large part of the air quantity is small, so that the fluency of the high-temperature flue gas and the ambient cold air in the whole discharging process is ensured.

In some specific examples of the invention, as shown in FIG. 1, the gas water heater 1 further comprises a combustion heat exchange cavity 40, the heat exchange system 10 and the combustion system 20 are disposed within the combustion heat exchange cavity 40, and the transverse smoke collecting hood 100 is mounted on top of the combustion heat exchange cavity 40. Therefore, not only can the heat loss be reduced, but also the smoke can be prevented from flowing to the inside of the gas water heater 1, and the smoke emission effect is ensured.

Other constructions and operations of the gas water heater 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

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

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

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

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

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

Claims

1. A gas water heater, comprising:

a heat exchange system;

a combustion system for heating the heat exchange system, the combustion system having a plurality of fire rows;

the smoke exhaust system is used for exhausting smoke generated by the combustion system and comprises a transverse smoke collecting hood and a smoke exhaust fan, the transverse smoke collecting hood is used for rectifying the smoke, the smoke exhaust fan is used for guiding the smoke in the transverse smoke collecting hood to be exhausted, the length direction of the transverse smoke collecting hood extends along the left-right direction so as to span all fire rows of the combustion system, and the smoke exhaust fan is arranged on the transverse smoke collecting hood; the smoke exhaust fan includes:

the shell is provided with a smoke inlet, a cooling air inlet and a smoke outlet, wherein the smoke inlet faces the inside of the transverse smoke collecting hood, and the cooling air inlet faces the outside of the transverse smoke collecting hood;

the impeller is rotatably arranged in the shell, two end surfaces of the impeller respectively form a smoke suction opening facing the smoke inlet and a suction opening facing the cooling air inlet, and the outer circumferential surface of the impeller forms a wind supply opening facing the smoke outlet;

the baffle is arranged in the impeller and separates the smoking opening from the air suction opening;

the motor is arranged on the shell and positioned at the cooling air inlet, and is in transmission connection with the impeller; the cooling air inlet is an inner flanging hole, the difference between the radius of the cooling air inlet and the maximum radius of the outer contour of the motor is a first pumping force adjusting value A with adjustable size, the distance between the motor and the inner end surface of the cooling air inlet in the axial direction of the motor is a second pumping force adjusting value B with adjustable size, the magnitude of the first pumping force adjusting value A and the magnitude of the second pumping force adjusting value B can be controlled through joint control, so that the magnitude of pumping force of ambient cold air can be controlled, the air inflow of the ambient cold air can be controlled, and in the axial direction of the impeller, the distance between the baffle and the smoking port is larger than the distance between the baffle and the air suction port.

2. The gas water heater of claim 1, wherein the ratio of the outer diameter R0 of the separator to the outer diameter R1 of the impeller is 1/3-1.

3. The gas water heater of claim 1, wherein the relative position of the baffle and the impeller is fixed for rotation with the impeller.

4. The gas water heater according to claim 1, wherein the housing has a volute structure, the flue gas inlet and the cooling air inlet are respectively provided at both end surfaces of the housing, and an opening of the flue gas outlet is upward.

5. The gas water heater according to claim 4, wherein a distance between the impeller and the casing increases gradually in a circumferential direction of the casing toward the flue gas outlet.

6. The gas water heater of claim 1, wherein the motor is located outside the housing and a motor shaft of the motor extends into the cooling air inlet in driving connection with the impeller.

7. The gas water heater as recited in any one of claims 1-6, further comprising:

the combustion heat exchange cavity, the heat exchange system and the combustion system are arranged in the combustion heat exchange cavity, and the transverse smoke collecting hood is arranged at the top of the combustion heat exchange cavity.