CN207161354U - Gas heater and the fan assembly for gas heater - Google Patents

Abstract

The utility model discloses a gas water heater and a fan assembly used for the gas water heater. The fan assembly used for the gas water heater comprises: a casing, and a first air chamber and a second air chamber which are arranged at intervals are defined in the casing. The first air chamber has a first air inlet and a first air outlet, and the second air chamber has a second air inlet and a second air outlet; In the cavity; the impeller, the impeller is arranged in the second air cavity; the motor, the motor is arranged on the casing, the heat dissipation wheel is located between the impeller and the motor, and the motor The drive shaft is sequentially connected with the heat dissipation wheel and the impeller. The fan assembly for a gas water heater according to the embodiment of the utility model can effectively prevent the motor from being subjected to heat radiation from high-temperature flue gas, reduce the ambient temperature around the motor, accelerate heat dissipation of the motor, and prevent the motor from overheating.

Description

Gas water heaters and fan assemblies for gas water heaters

technical field

The utility model relates to the technical field of gas water heaters, in particular to a gas water heater and a fan assembly for the gas water heater.

Background technique

At present, the forced exhaust gas water heaters in the gas water heater industry can be divided into strong pumping and strong drum. The electric fan of the strong-drawing gas water heater is in the upper part of the machine, and the exhaust gas is forced to be discharged outside by using the suction force, while the fan of the strong-drum gas water heater is blowing the exhaust gas out of the lower part of the machine. Most of the strong drum fans use DC motors with adjustable speed and excellent wind resistance. The forced draft fan adopts an AC fan, whose speed is basically fixed and has poor wind resistance, but the processing technology is simple and the cost advantage of the whole machine is obvious.

For this reason, some people in the industry proposed to develop a DC forced-pump gas water heater, but the DC motor is equipped with a motor control circuit board, and the control board is integrated with Hall components for output speed, semiconductor materials such as high-power tubes, and some resistors and capacitors. The working characteristics and working life of semiconductor components are greatly affected by temperature. The fan part of the forced-drawing gas water heater is located above the heat exchanger, and is always affected by high-temperature flue gas during the working process, resulting in a higher temperature around the volute. At this time, the circuit board semiconductor components of the fan are not only affected by the temperature rise generated by its own work, but also by the heat radiation generated by the surrounding high-temperature flue gas, and there is a risk of flue gas leakage. The temperature rise of the fan circuit board will cause the drift of the electrical characteristics of the semiconductor. If the temperature is too high, it will cause irreversible damage to the semiconductor.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. Therefore, the utility model proposes a fan assembly for a gas water heater, which can effectively prevent the motor from overheating.

The utility model also proposes a gas water heater with the above-mentioned fan assembly.

The fan assembly for a gas water heater according to an embodiment of the present invention includes: a casing, a first air chamber and a second air chamber that are spaced apart are defined in the casing, and the first air chamber has a first inlet A tuyere and a first air outlet, the second air chamber has a second air inlet and a second air outlet; a heat dissipation wheel, the heat dissipation wheel is arranged in the first air chamber; an impeller, the impeller is arranged in the In the second air cavity; motor, the motor is arranged on the casing, the heat dissipation wheel is located between the impeller and the motor, and the drive shaft of the motor is sequentially connected with the heat dissipation wheel and the impeller connected.

The fan assembly for a gas water heater according to the embodiment of the utility model can effectively prevent the motor from being subjected to heat radiation from high-temperature flue gas, reduce the ambient temperature around the motor, accelerate heat dissipation of the motor, and prevent the motor from overheating.

In addition, the fan assembly for a gas water heater according to the above-mentioned embodiments of the utility model may also have the following additional technical features:

According to an embodiment of the fan assembly for gas water heaters of the present invention, the rotation axes of the motor, the impeller and the heat dissipation wheel extend along the horizontal direction, and the second air inlet is arranged at the lower part of the casing , the second air outlet is arranged on the upper part of the casing.

Further, the first air inlet is arranged on the side of the casing, and the first air outlet is arranged on the upper part of the casing.

According to some embodiments of the present utility model, the motor includes: a motor body and the drive shaft, and the motor body is arranged outside the housing.

Further, an installation hole is provided on the side of the casing, and the motor body is provided in the installation hole with a clearance fit to form the first air inlet.

According to a further embodiment of the present utility model, the outer periphery of the motor body is provided with a plurality of installation parts spaced apart along its circumference, and the installation parts are connected to the housing through threaded fasteners.

Optionally, the width of the fitting gap between the motor body and the installation hole is 2mm-5mm.

According to some embodiments of the present utility model, the motor is a DC motor.

In some embodiments of the present utility model, the casing includes: a smoke collection hood; a cover plate, the cover plate is set on one side of the smoke collection hood; a heat insulation plate, the heat insulation plate is set on Between the fume collecting hood and the cover plate, the space between the fume collecting hood and the cover plate is divided into the first air chamber and the second air chamber, the motor and the connected to the cover.

The gas water heater according to the embodiment of the present utility model includes: a casing, an installation cavity is defined in the casing; a gas burner, the gas burner is arranged in the installation cavity; a heat exchanger, the heat exchanger is arranged In the installation cavity and above the gas burner; according to the fan assembly for a gas water heater according to the embodiment of the present utility model, the first air inlet communicates with the installation cavity, and the second air inlet The air outlet communicates with the flue gas outlet of the heat exchanger, and the first air outlet and the second air outlet communicate with the outside.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic diagram of an exploded structure of a fan assembly according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of a gas water heater according to an embodiment of the present invention;

Fig. 3 is a schematic structural view of a gas water heater according to another embodiment of the present invention.

Reference signs:

fan assembly 100; gas water heater 110;

The casing 10; the first air chamber 101; the second air chamber 102; the first air inlet 103; the first air outlet 104; the second air inlet 105; the second air outlet 106; the installation hole 107;

Smoke collecting hood 11; cover plate 12; heat shield 13;

cooling wheel 20;

impeller 30;

Motor 40; motor body 401; drive shaft 402; mounting part 403;

Shell 50; installation cavity 501; ventilation hole 502;

Gas burner 60; Gas inlet 601;

Heat exchanger 70; Water inlet 701; Water outlet 702;

Power board 80.

Detailed ways

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, intended to explain the utility model, but can not be construed as a limitation of the utility model, those of ordinary skill in the art will not depart from the principle and purpose of the utility model Under the circumstances, various changes, modifications, substitutions and modifications can be made to these embodiments, and the scope of the present invention is defined by the claims and their equivalents.

In the description of the present utility model, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", The orientation or positional relationship indicated by "vertical", "horizontal", "inner", "outer", "axial", "radial", "circumferential" etc. is based on the orientation or positional relationship shown in the drawings, It is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

The fan assembly 100 according to the embodiment of the present utility model will be described below with reference to FIGS. 1-3 .

Referring to FIG. 1 , a fan assembly 100 according to an embodiment of the present invention may include: a casing 10 , a cooling wheel 20 , an impeller 30 and a motor 40 .

Specifically, a first air chamber 101 and a second air chamber 102 may be defined inside the casing 10, and the first air chamber 101 and the second air chamber 102 are arranged at intervals, wherein the first air chamber 101 has a first air inlet 103 and the first air outlet 104 , the second air cavity 102 has a second air inlet 105 and a second air outlet 106 . The heat dissipation wheel 20 can be arranged in the first air chamber 101, the impeller 30 can be arranged in the second air chamber 102, the motor 40 can be arranged on the casing 10, the heat dissipation wheel 20 is located between the impeller 30 and the motor 40, and the motor 40 The drive shaft 402 is connected with the cooling wheel 20 and the impeller 30 in turn.

Thus, the drive shaft 402 of the motor 40 can drive the cooling wheel 20 and the impeller 30 to rotate at the same time, and the suction force of the impeller 30 makes the high-temperature flue gas enter the second air chamber 102 from the second air inlet 105 , and then pass through the second air outlet 106 Expelled from the outside world. The rotation of the cooling wheel 20 drives the air to enter the first air chamber 101 through the first air inlet 103 , and then be discharged to the outside through the first air outlet 104 .

In the related art, the motor is located between the impeller and the cooling wheel, and the disturbed air in the heat dissipation process of the cooling wheel is still high-temperature air radiated by high-temperature flue gas, and the cooling effect of the motor is not obvious.

In the embodiment of the present utility model, the casing 10 is provided with a first wind chamber 101 and a second wind chamber 102 which are spaced apart, and the impeller 30 is arranged in the second wind chamber 102, and the cooling wheel 20 is located in the second wind chamber 102. In the first air cavity 101, a double exhaust system arranged at intervals is formed. Driven by the impeller 30, the high-temperature flue gas can flow out through the second air chamber 102. During this process, the high-temperature flue gas will not enter the first air chamber 101 and will not contact the cooling wheel 20, which can reduce the high-temperature fume. The heat of the gas is transferred to the heat dissipation wheel 20, and the heat dissipation wheel 20 operates reliably, which is conducive to improving the heat dissipation effect. Moreover, the cooling wheel 20 is arranged between the impeller 30 and the motor 40, that is to say, the motor 40 is also not in the second wind chamber 102, and can be separated by the wall between the first wind chamber 101 and the second wind chamber 102 , and have a certain distance from the high-temperature second air cavity 102 . As a result, the high-temperature flue gas will not be directly blown to the motor 40, and the heat transfer to the motor 40 can be reduced, the heat received by the motor 40 is reduced, and the cooling wheel 20 can improve the heat dissipation of the motor 40, and the reliability of the motor 40 is improved. promote.

According to the fan assembly 100 of the embodiment of the present utility model, by setting the spaced first air chamber 101 and the second air chamber 102 in the casing 10, and setting the cooling wheel 20 between the impeller 30 and the motor 40, it can effectively Avoiding the thermal radiation of the motor 40 from the high-temperature flue gas can reduce the ambient temperature around the motor 40 and accelerate the heat dissipation of the motor 40 to prevent the motor 40 from overheating.

In the related art, the rotation axis of the fan part extends in the vertical direction. Since the dimension of the fan part perpendicular to the direction of the rotation axis is larger than the width along the direction of the rotation axis, the thickness of the horizontal direction of the device with the fan part is required to be large enough , in order to realize the installation of fan components. And according to some embodiments of the present utility model, as shown in Fig. 1-Fig. The width and size are small, and the fan assembly 100 is easy to install.

In addition, the second air inlet 105 can be arranged at the lower part of the casing 10, and the second air outlet 106 can be arranged at the upper part of the casing 10. The high-temperature flue gas directly enters the second air chamber 102 through the second air inlet 105, and then is discharged by the second air inlet 105. The second air outlet 106 is discharged outside, and there is no elbow loss in the high-temperature flue gas flow path, and the wind resistance effect is better.

As shown in Figure 1, in some embodiments of the present utility model, the first air inlet 103 can be arranged on the side of the casing 10, and the first air outlet 104 can be arranged on the upper part of the casing 10, thus, in the fan During the operation of the assembly 100 , the cold air on the side away from the second air chamber 102 that has not been radiated by the heat of the high-temperature flue gas continuously enters the first air chamber 101 through the first air inlet 103 and is discharged through the first air outlet 104 , so that the air in the first air chamber 101 is in a flowing state, and always maintains a relatively low temperature without being affected by the heat radiation of the high-temperature flue gas in the second air chamber 102, so that the air disturbed by the cooling wheel 20 is always cold air, so that The cooling effect of the motor 40 is more obvious.

According to some embodiments of the present utility model, the motor 40 may include: a motor body 401 and a drive shaft 402 . The motor body 401 is arranged outside the casing 10 , and the motor body 401 drives the impeller 30 and the cooling wheel 20 through the drive shaft 402 . Thus, the motor body 401 is not only farther away from the high-temperature second air chamber 102, but also is not located in the first air chamber 101 affected by the heat radiation of the second air chamber 102, and the ambient temperature of the motor body 401 is relatively lower. Low, to further reduce the influence of high-temperature flue gas on the temperature of the motor body 401, and the effect of preventing overheating is better.

Further, as shown in FIG. 1 , the side of the casing 10 may be provided with a mounting hole 107 , and the motor body 401 is fitted in the mounting hole 107 to form a first air inlet 103 , and cold air enters through the first air inlet 103 The first air cavity 101 has smooth air intake, ensures the flow of cold air, and has a simple structure.

The matching gap between the motor body 401 and the mounting hole 107 can be flexibly designed according to the actual situation. Optionally, according to some embodiments of the present invention, the width of the matching gap between the motor body 401 and the mounting hole 107 can be 2mm-5mm. Therefore, the width of the matching gap will not be too small, so that the cold air can enter the first air cavity 101 more smoothly, and the matching gap will not be too large, so as to ensure that the connection between the motor body 401 and the mounting hole 107 is more firm and reliable. For example, in some specific embodiments of the present invention, the values of the width of the fitting gap are 3mm, 3.5mm, 4mm, 4.5mm, etc. respectively.

In some embodiments of the present utility model, as shown in FIG. 1 and FIG. 2 , a plurality of installation parts 403 may be provided on the outer periphery of the motor body 401 , and the plurality of installation parts 403 are arranged at intervals along the circumference of the motor body 401 , and the mounting part 403 is connected to the casing 10 through threaded fasteners, so that the connection between the motor body 401 and the casing 10 is more firm, and the connection is simple and easy to install. It should be noted that the present invention does not specifically limit the number of mounting parts 403. In the specific embodiment shown in FIG. It only needs to satisfy the requirement that the motor body 401 is connected firmly and reliably with the casing 10 . In addition, the connection method between the mounting portion 403 of the motor body 401 and the casing 10 is not limited thereto. According to actual needs, for example, the mounting portion 403 of the motor body 401 and the casing 10 can also be connected through a hook structure, or can also be integrated. form.

According to some embodiments of the present utility model, the motor 40 can be a DC motor, which has a high power factor, is more energy-saving, and has an adjustable speed and stronger wind resistance, making the fan assembly 100 work more stable and reliable, and more flexible And more energy-saving.

Further, as shown in FIG. 1 , the casing 10 may include: a smoke collection hood 11 , a cover plate 12 and a heat insulation plate 13 . The cover plate 12 can be set on one side of the smoke collecting hood 11, and the heat insulating plate 13 can be arranged between the smoke collecting hood 11 and the cover plate 12, and the heat insulating plate 13 can cover the space between the smoke collecting hood 11 and the cover plate 12. The space is divided into a first air cavity 101 and a second air cavity 102 , and the motor 40 can be connected with the cover plate 12 . Thus, after the high-temperature flue gas enters the second air chamber 102, it is double-sealed and isolated by the heat insulation plate 13 and the cover plate 12, which can effectively prevent the risk of flue gas leakage. In addition, the heat shield 13 can effectively prevent the high-temperature flue gas in the second air chamber 102 from radiating heat to the cold air in the first air chamber 101 , which is beneficial to prevent the motor 40 from overheating.

As shown in FIG. 2 and FIG. 3 , the gas water heater 110 according to the embodiment of the utility model may include: a housing 50 , a gas burner 60 , a heat exchanger 70 and a fan assembly 100 according to the embodiment of the utility model.

An installation chamber 501 is defined in the housing 50 , the gas burner 60 and the heat exchanger 70 are arranged in the installation chamber 501 , and the heat exchanger 70 is arranged above the gas burner 60 . The gas burner 60 has a gas inlet 601, and the gas inlet 601 is arranged at the lower part of the casing 50, and the lower part of the casing 50 is also provided with a water inlet 701 and a water outlet 702, and a bent water pipe is connected between the water inlet 701 and the water outlet 702, The water pipe cooperates with the heat exchanger 70 in the installation cavity 501 to realize heat exchange. The first air inlet 103 of the fan assembly 100 communicates with the installation cavity 501, the second air inlet 105 communicates with the flue gas outlet of the heat exchanger 70, the first air outlet 104 and the second air outlet 106 communicate with the outside world, and the housing 50 communicates with A ventilation hole 502 communicating with the outside may be provided at a corresponding position of the fan assembly 100 . The circuit control of the gas water heater 110 is supported by the power board 80 .

Thus, after the power board 80 is connected, cold water enters the water pipe through the water inlet 701, gas enters the gas burner 60 through the gas inlet 601, and burns in the gas burner 60 to generate high-temperature flue gas, which then enters the heat exchanger 70 Perform heat exchange with cold water, and the hot water after heat exchange flows out from the water outlet 702 . The motor 40 of the fan assembly 100 is running, and the centrifugal effect of the high-speed rotation of the impeller 30 causes the high-temperature flue gas to enter the second air chamber 102 through the flue gas outlet of the heat exchanger 70 and the second air inlet 105 in sequence, and then be discharged through the second air outlet 106 Outside, the structural design is reasonable, which can effectively avoid smoke leakage. At the same time, the cooling wheel 20 rotates at a high speed, and the cold air enters the installation cavity 501 through the ventilation hole 502, then enters the first air cavity 101 through the first air inlet 103, and finally is discharged to the outside world through the first air outlet 104, ensuring that the air is completely cooled by the first air inlet 103. The flow of cold air entering the first air chamber 101 is sufficient and smooth.

In a specific embodiment shown in FIG. 2 , the rotation axes of the motor 40 , the impeller 30 and the heat dissipation wheel 20 extend along the horizontal direction, the heat dissipation wheel 20 is located between the motor 40 and the impeller 30 , and the motor 40 is far away from the ventilation hole 502 side. Of course, the installation direction of the fan assembly 100 can also be reversed. For example, in another specific embodiment as shown in FIG. Between the impellers 30, and the motor 40 is on the side close to the ventilation hole 502, which is more conducive to the circulation of cold air.

Since the fan assembly 100 according to the embodiment of the utility model has the above-mentioned beneficial technical effect, the gas water heater 110 according to the embodiment of the utility model also has a corresponding technical effect, which can effectively prevent the motor 40 from being subjected to the heat radiation of the high-temperature flue gas, and can Reduce the ambient temperature around the motor 40 and accelerate the heat dissipation of the motor 40 to prevent the motor 40 from overheating.

Other configurations and operations of the gas water heater 110 and the fan assembly 100 according to the embodiment of the present utility model are known to those skilled in the art, and will not be described in detail here.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

In the description of this specification, descriptions referring to the terms "embodiment", "specific embodiment", "example" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the present invention. In at least one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined with each other in an appropriate manner in any one or more embodiments or examples without interference or contradiction.

Claims (10)

1. A fan assembly for a gas water heater, characterized in that it comprises: A casing, the casing defines a first air chamber and a second air chamber arranged at intervals, the first air chamber has a first air inlet and a first air outlet, and the second air chamber has a second air inlet The air outlet and the second air outlet; A heat dissipation wheel, the heat dissipation wheel is arranged in the first air cavity; an impeller, the impeller is arranged in the second air cavity; A motor, the motor is arranged on the casing, the heat dissipation wheel is located between the impeller and the motor, and the drive shaft of the motor is connected with the heat dissipation wheel and the impeller in turn. 2. The fan assembly for gas water heater according to claim 1, characterized in that, the rotation axes of the motor, the impeller and the heat dissipation wheel extend along the horizontal direction, and the second air inlet is arranged at the The lower part of the casing, and the second air outlet is arranged at the upper part of the casing. 3. The fan assembly for a gas water heater according to claim 2, wherein the first air inlet is arranged at the side of the casing, and the first air outlet is arranged at the side of the casing upper part. 4. The fan assembly for a gas water heater according to claim 3, wherein the motor comprises: The motor main body and the drive shaft, the motor main body is arranged on the outside of the casing. 5. The fan assembly for a gas water heater according to claim 4, wherein a mounting hole is provided on the side of the casing, and the motor body is arranged at the mounting hole with clearance fit to form the The first air inlet. 6. The fan assembly for gas water heater according to claim 5, characterized in that, the outer periphery of the motor body is provided with a plurality of installation parts spaced along its circumference, and the installation parts are threaded Fasteners are connected to the casing. 7. The fan assembly for a gas water heater according to claim 5, wherein the width of the fit gap between the motor body and the installation hole is 2mm-5mm. 8. The blower assembly for a gas water heater according to claim 1, wherein the motor is a DC motor. 9. The fan assembly for a gas water heater according to any one of claims 1-8, wherein the casing comprises: smoke hood; a cover plate, the cover plate is arranged on one side of the smoke collecting hood; a heat insulation plate, the heat insulation plate is arranged between the smoke collection hood and the cover plate, so as to divide the space between the smoke collection hood and the cover plate into the first air chamber and the The second air cavity, the motor is connected with the cover plate. 10. A gas water heater, characterized in that it comprises: a housing, wherein an installation cavity is defined in the housing; a gas burner, the gas burner is arranged in the installation cavity; a heat exchanger, the heat exchanger is arranged in the installation cavity and above the gas burner; The fan assembly for a gas water heater according to any one of claims 1-9, the first air inlet communicates with the installation cavity, the second air inlet communicates with the flue gas outlet of the heat exchanger In communication, the first air outlet and the second air outlet communicate with the outside world.