JP2022021405A - Blower and water heating system - Google Patents

Abstract

To provide a blower and a water heating system capable of reducing noise.SOLUTION: A shroud 3 is disposed at a first end 1F side of a blade plate 1, and has a hole portion 3c through which air passes, at its center. A face plate 2 is disposed at a second end 1S side of the blade plate 1, and has a slit portion 2c. The second end 1S of the blade plate 1 is fixed to the face plate 2 by being inserted to the slit portion 2c without caulked at a position of an inner peripheral side of the face plate 2 with respect to an inner peripheral end 1fe of the first end 1F.SELECTED DRAWING: Figure 4

Description

The present invention relates to a blower and a hot water device.

Conventionally, the configuration of an impeller of a blower device is disclosed in, for example, Japanese Patent Application Laid-Open No. 56-20737 (Patent Document 1), Japanese Patent Application Laid-Open No. 6-336997 (Patent Document 2), and the like.

Patent Document 1 discloses an electric blower as a blower. In this electric blower, the fitting convex portion at the upper end of the blade is fitted into the fitting hole of the front plate, and the fitting convex portion at the lower end of the blade is fitted into the fitting hole of the rear plate.

Patent Document 2 discloses a double-sided suction fan for a range hood as a blower. In this double-sided suction fan, the caulking claw at the lower end of the blade plate is fitted into the through hole of the lower plate, the caulking claw at the upper end of the blade plate is inserted into the through hole of the upper plate, and the caulking claw at the step portion of the blade plate is a circular substrate. It is fitted in the through hole.

Jikkensho 56-20737 Gazette Japanese Unexamined Patent Publication No. 6-336997

In each of the blowers of Patent Documents 1 and 2, there is a problem that the pitches of a plurality of blade plates in the circumferential direction (hereinafter referred to as "blade pitch") become uneven and the noise performance deteriorates.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a blower device and a hot water device capable of reducing noise.

One blower of the present invention includes a blade plate, a disk-shaped shroud, and a disk-shaped face plate. The blade plate has a first end and a second end facing each other. The shroud is arranged on the first end side of the blade plate and has a hole in the center through which air passes. The face plate is arranged on the second end side of the blade plate and has a recess. The second end of the blade plate is fixed to the face plate by being inserted into the recess at a position on the inner peripheral side of the face plate with respect to the inner peripheral end of the first end.

According to one blower of the present invention, the second end of the blade plate is fixed to the face plate by being inserted into the recess at a position on the inner peripheral side of the inner peripheral end of the first end of the blade plate. .. As a result, it is possible to prevent the inner peripheral portion of the second end of the blade plate from being displaced in the circumferential direction. Therefore, the pitches of the plurality of blade plates in the circumferential direction are easily aligned, and noise caused by the irregular pitches of the blade plates in the circumferential direction can be reduced.

Further, the second end of the blade plate is only inserted into the recess of the face plate at a position on the inner peripheral side of the face plate with respect to the inner peripheral end of the first end, and is not crimped to the face plate. Therefore, the deformation of the face plate due to caulking can be prevented, and the generation of noise due to the deformation of the face plate can be prevented.

In the above-mentioned blower, the blade plate has a claw portion protruding toward the face plate at a position on the inner peripheral side of the face plate from the inner peripheral end of the first end at the second end. The recess is composed of a slit portion, and the claw portion is inserted into the slit portion.

This makes it possible to reduce noise with a simple configuration in which the claw portion is inserted into the slit portion. Further, since the face plate is not crimped only by inserting the claw portion into the slit portion, deformation of the face plate due to caulking can be prevented.

In the above blower, the face plate has a central portion and a peripheral portion surrounding the central portion thereof. The central part is recessed toward the shroud side. The slit portion is provided in the central portion of the face plate.

If the claw portion is crimped to the face plate in the recessed portion of the face plate, the face plate may be deformed in the recessed portion. A shaft hole for fixing the rotation shaft of the drive source is provided in the recessed portion of the face plate. Therefore, when the recessed portion is deformed, the circumferential runout in the axial direction of the face plate becomes large when the impeller rotates, and noise due to the circumferential runout is generated.

On the other hand, according to the above-mentioned blower, the claw portion is only inserted into the slit portion of the recessed portion and is not crimped to the face plate. Therefore, deformation of the face plate due to caulking is prevented, and noise caused by circumferential runout in the axial direction of the face plate is prevented.

In the above blower, the claw portion has a base portion and a tip portion. The width of the claw portion decreases from the base side toward the tip portion.

As a result, the claw portion can be smoothly inserted into the slit portion. Therefore, the assemblability between the blade plate and the face plate is improved.

The other blower of the present invention includes a blade plate, a disk-shaped shroud, and a disk-shaped face plate. The blade plate has a first end and a second end facing each other. The shroud is arranged on the first end side of the blade plate and has a hole in the center through which air passes. The face plate is arranged on the second end side of the blade plate and has a recess. The blade plate has a protrusion that is crimped to the face plate. The second end of the blade plate is fixed to the face plate by being inserted into the recess at a position on the inner peripheral side of the face plate with respect to the protrusion.

According to the other blower device of the present invention, the second end of the blade plate is fixed to the face plate by being inserted into the recess at a position on the inner peripheral side of the face plate with respect to the protrusion. As a result, it is possible to prevent the inner peripheral portion of the second end of the blade plate from being displaced in the circumferential direction. Therefore, the pitches of the plurality of blade plates in the circumferential direction are easily aligned, and noise caused by the irregular pitches of the blade plates in the circumferential direction can be reduced.

Further, the second end of the blade plate is only inserted into the recess of the face plate at a position on the inner peripheral side of the face plate with respect to the inner peripheral end of the first end, and is not crimped to the face plate. Therefore, the deformation of the face plate due to caulking can be prevented, and the generation of noise due to the deformation of the face plate can be prevented.

The water heating device of the present invention includes the above-mentioned blower, combustion device, and heat exchanger. The combustion device uses the combustion air supplied by the blower to generate combustion gas. The heat exchanger exchanges heat with the combustion gas supplied by the combustion device.

According to the hot water device of the present invention, noise is reduced because the above-mentioned blower device is used.

As described above, according to the present invention, it is possible to realize a blower device and a water heating device capable of reducing noise.

It is sectional drawing which shows schematically the structure of the blower device in one Embodiment. It is a perspective view which shows the structure of the impeller used for the blower of FIG. It is a top view which looked at the impeller used for the blower of FIG. 1 from the shroud side. FIG. 3 is a schematic cross-sectional view taken along the line IV-IV of FIG. FIG. 3 is a cross-sectional perspective view showing a configuration in which a protrusion of an impeller used for the blower device of FIG. 1 is crimped to a face plate. FIG. 3 is a cross-sectional perspective view showing a configuration in which a claw portion of an impeller used for the blower device of FIG. 1 is inserted into a slit portion of a face plate. It is a figure which shows the structure of the claw part of the impeller used for the blower of FIG. FIG. 3 is a cross-sectional perspective view showing a configuration in which a claw portion of an impeller used for the blower device of FIG. 1 is inserted into a recess of a face plate. FIG. 3 is a cross-sectional perspective view showing a configuration in which a claw portion of an impeller used for the blower device of FIG. 1 is inserted into a concave portion between convex portions of a face plate. It is a figure which shows the structure of the hot water apparatus which has the blower of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, in the specification and the drawing, the same component or the corresponding component is designated by the same reference numeral, and duplicate description is not repeated. Further, in the drawings, the configuration may be omitted or simplified for convenience of explanation. Further, at least a part of each embodiment and each modification may be arbitrarily combined with each other.

<Structure of blower device>
First, the configuration of the blower device according to the embodiment of the present invention will be described with reference to FIGS. 1 to 7.

As shown in FIG. 1, the blower device 10 of the present embodiment mainly includes an impeller 4, a drive source 5, and a fan case 6. The impeller 4 has a plurality of blade plates 1, a face plate 2, and a shroud 3.

Each of the plurality of blade plates 1 has a first end 1F and a second end 1S facing each other. The shroud 3 is arranged on the 1F side of the first end of each of the plurality of blade plates 1. The shroud 3 has a hole 3c in the center through which air passes. The face plate 2 is arranged on the second end 1S side of each of the plurality of blade plates 1. The face plate 2 has a shaft hole 2d in the center.

The drive source 5 is, for example, a motor. The drive source 5 has a main body portion 5a and a rotation shaft 5b. The rotating shaft 5b can rotate with respect to the main body 5a by being applied with a driving force from the main body 5a. The rotating shaft 5b is inserted into the shaft hole 2d of the face plate 2. As a result, the impeller 4 is attached to the rotating shaft 5b and can rotate together with the rotating shaft 5b.

The fan case 6 has an internal space 6S. The fan case 6 houses the impeller 4 in the internal space 6S. The fan case 6 has a suction port 6a. The suction port 6a is arranged at a position facing the hole 3c of the shroud 3 in the impeller 4. The suction port 6a may be provided with a bell mouth, a rectifying member, or the like (not shown). The fan case 6 has an outlet (not shown) for blowing out the air discharged by the rotation of the impeller 4.

As shown in FIGS. 2 and 3, each of the face plate 2 and the shroud 3 has a disk shape. The face plate 2 and the shroud 3 are arranged so as to be concentric with each other. The face plate 2 and the shroud 3 are arranged with a gap in the axial direction of the rotation shaft 5b (FIG. 1) from each other. Each of the plurality of blade plates 1 is arranged between the face plate 2 and the shroud 3.

As shown in FIG. 3, in a plan view, each of the plurality of blade plates 1 extends linearly along the radial direction from the inner peripheral side to the outer peripheral side of the face plate 2 and the shroud 3. In the present specification, the plan view means a viewpoint of viewing the impeller from the axial direction of the rotation axis 5b (FIG. 1). Further, each of the plurality of blade plates 1 may extend in a curved shape from the inner peripheral side to the outer peripheral side of the face plate 2 and the shroud 3 in a plan view.

As shown in FIG. 4, the shroud 3 has slit portions 3a and 3b. The slit portion 3a is located on the outer peripheral side of the slit portion 3b. Each of the slit portions 3a and 3b is an elongated through hole.

Each of the plurality of blade plates 1 is in contact with the shroud 3 at the first end 1F. Each of the plurality of blade plates 1 has protrusions 1fa and 1fb on the first end 1F. Each of the protrusions 1fa and 1fb protrudes toward the shroud 3 at the first end 1F of the blade plate 1.

The protrusion 1fa of the blade plate 1 is crimped to the slit portion 3a of the shroud 3. Further, the protrusion 1fb of the blade plate 1 is crimped to the slit portion 3b of the shroud 3.

The face plate 2 has slit portions 2a, 2b, and 2c. The slit portion 2a is located on the outer peripheral side of the slit portion 2b. Further, the slit portion 2b is located on the outer peripheral side of the slit portion 2c (recessed portion). Each of the slit portions 2a, 2b, and 2c is an elongated through hole.

Each of the plurality of blade plates 1 is in contact with the face plate 2 at the second end 1S. Each of the plurality of blade plates 1 has a protrusion 1sa, 1sb and a claw portion 1N at the second end 1S. Each of the protrusions 1sa and 1sb and the claw portion 1N protrudes toward the face plate 2 at the second end 1S of the blade plate 1.

The protrusion 1sa of the blade plate 1 is crimped to the slit portion 2a of the face plate 2. Further, the protrusion 1sb of the blade plate 1 is crimped to the slit portion 2b of the face plate 2.

As shown in FIG. 5, "caulked" in the present specification means that the dimension T3 in the circumferential direction of the tip of the protrusion 1sa and 1sb is larger than the dimension D1 in the circumferential direction of the slit portions 2a and 2b. It means that the protrusions 1sa and 1sb are processed as described above. Specifically, after the protrusions 1sa and 1sb are inserted into the slits 2a and 2b, the tips of the protrusions 1sa and 1sb are processed so as to have the dimension T3.

The dimension T1 in the circumferential direction of the blade plate 1 other than the tips of the protrusions 1sa and 1sb is smaller than the dimension D1 in the circumferential direction of the slit portions 2a and 2b. Therefore, the protrusions 1sa and 1sb can be inserted into the slits 2a and 2b before the tips of the protrusions 1sa and 1sb are machined to the dimension T3.

Further, the configuration in which the protrusions 1sa and 1sb of the blade plate 1 are crimped to the slit portions 3a and 3b of the shroud 3 is the same as the configuration shown in FIG.

On the other hand, the claw portion 1N of the blade plate 1 is not crimped to the slit portion 2c, but is simply inserted. As shown in FIG. 6, “simply inserted” in the present specification means that the dimension T2 in the circumferential direction of the entire claw portion 1N is smaller than the dimension D2 in the circumferential direction of the slit portion 2c. It means that 1N is inserted into the slit portion 2c. The dimension T1 in the circumferential direction of the blade plate 1 other than the claw portion 1N is the same as the dimension T2 in the circumferential direction of the entire claw portion 1N.

The ratio of the dimension D2 of the slit portion 2c to the dimension T2 of the claw portion 1N is 1.0 or more and 1.5 or less. Therefore, when the dimension T2 of the claw portion 1N is, for example, 0.4 mm, the dimension D2 of the slit portion 2c is, for example, 0.4 mm or more and 0.6 mm or less.

As shown in FIG. 4, the inner peripheral end 1se of the second end 1S of the blade plate 1 is located on the inner peripheral side of the inner peripheral end 1fe of the first end 1F. The claw portion 1N is arranged on the inner peripheral side of the inner peripheral end 1fe of the first end 1F. The entire claw portion 1N may be located on the inner peripheral side of the inner peripheral end 1fe. Further, only a part of the claw portion 1N may be located on the inner peripheral side of the inner peripheral end 1fe, and the remaining portion of the claw portion 1N may be located on the outer peripheral side of the inner peripheral end 1fe.

Here, the inner peripheral end 1fe is a portion of the first end 1F of the blade plate 1 that is located on the innermost side. Further, the inner peripheral side of the inner peripheral end 1fe is located on the inner peripheral side of the virtual straight line SL that passes through the inner peripheral end 1fe and extends in parallel with the axial direction AX of the rotation axis 5b (FIG. 1). means.

The claw portion 1N is fixed to the face plate 2 by being inserted into the slit portion 2c. Here, being fixed means that the position of the claw portion 1N is fixed. In a state where the claw portion 1N is inserted into the slit portion 2c, the claw portion 1N is sandwiched by the face plate 2 from both sides of the face plate 2, for example, in the circumferential direction. That is, the second end 1S of the blade plate 1 is a face plate by inserting the claw portion 1N into the recess formed by the slit portion 2c at the position on the inner peripheral side of the face plate 2 with respect to the inner peripheral end 1fe of the first end 1F. It is sandwiched by the face plates 2 from both sides of 2, for example, in the circumferential direction.

Further, the claw portion 1N is arranged on the inner peripheral side of the protrusions 1sa and 1sb. Therefore, the second end 1S of the blade plate 1 is fixed to the face plate 2 by inserting the claw portion 1N into the recess formed by the slit portion 2c at the position on the inner peripheral side of the face plate 2 with respect to the protrusions 1sa and 1sb. , The face plate 2 is sandwiched by the face plates 2 from both sides in the circumferential direction, for example. As a result, the movement of the inner peripheral side portion (claw portion 1N) of the blade plate 1 in the circumferential direction is restricted by the face plate 2.

The face plate 2 has a central portion CP and a peripheral portion PP that surrounds the periphery of the central portion CP. The central portion CP is recessed toward the shroud 3 side with respect to the peripheral portion PP. The slit portion 2c is provided in the central portion CP of the face plate 2.

As shown in FIG. 7, the claw portion 1N has a base portion BP and a tip portion TP. The base BP of the claw portion 1N is the root of the claw portion. The width W of the claw portion 1N becomes smaller toward the tip portion TP from the base portion BP. The claw portion 1N may have a tapered shape such that the width W becomes smaller toward the tip portion TP from the base portion BP, or may have a round shape.

<Modification example>
In the above, the configuration in which the blade plate 1 is fixed to the face plate 2 by inserting the claw portion 1N into the slit portion 2c (elongated through hole) has been described, but this is the configuration in which the blade plate 1 is fixed to the face plate 2. Not limited to.

For example, as shown in FIG. 8, the claw portion 1N may be inserted into an elongated recess 2ca provided in the face plate 2. Further, as shown in FIG. 9, for example, the claw portion 1N may be inserted into a concave portion between two convex portions 2bb provided on the face plate 2 facing in the circumferential direction. In any of the configurations of FIGS. 8 and 9, the blade plate 1 is fixed by the face plate 2 and is sandwiched from both sides in the circumferential direction, for example.

Further, even if the configuration is other than this, it can be adopted as long as the blade plate 1 is fixed by the face plate 2 and is sandwiched from both sides in the circumferential direction, for example.

<Structure of hot water device>
Next, the configuration of the hot water device in which the blower device of the present embodiment is used will be described with reference to FIG.

As shown in FIG. 10, the water heating device 30 of the present embodiment includes the above-mentioned blower device 10, a water supply pipe 31, a hot water outlet pipe 32, a bypass pipe 33, a secondary heat exchanger 34, and a primary heat exchange. It mainly has a vessel 35, a combustion device 36, and an outer case 37. The blower 10, the water supply pipe 31, the hot water outlet pipe 32, the bypass pipe 33, the secondary heat exchanger 34, the primary heat exchanger 35, and the combustion device 36 are arranged in the outer case 37.

A secondary heat exchanger 34 and a primary heat exchanger 35 are connected between the water supply pipe 31 and the hot water outlet pipe 32. The secondary heat exchanger 34 is a latent heat recovery type heat exchanger. The primary heat exchanger 35 is a sensible heat recovery type heat exchanger.

A combustion device 36 is arranged below the secondary heat exchanger 34 and the primary heat exchanger 35. The primary heat exchanger 35 is located closer to the combustion device 36 than the secondary heat exchanger 34. Specifically, the primary heat exchanger 35 is arranged between the secondary heat exchanger 34 and the combustion device 36. A blower device 10 is arranged below the combustion device 36.

The water supply pipe 31 is connected to one end of the secondary heat exchanger 34. The other end of the secondary heat exchanger 34 and the one end of the primary heat exchanger 35 are connected to each other. A hot water outlet pipe 32 is connected to the other end of the primary heat exchanger 35. The water supply pipe 31 and the hot water outlet pipe 32 are connected by a bypass pipe 33.

The blower device 10 is for sending the air taken in from the outside of the outer case 37 to the combustion device 36. The combustion device 36 is for generating a combustion gas by igniting a mixed gas of the combustion air and the fuel gas supplied by the blower device 10.

The water supply pipe 31 is, for example, a pipe for supplying water. The water supplied from the water supply pipe 31 to the secondary heat exchanger 34 is preheated by recovering the latent heat of the combustion gas generated in the combustion device 36.

The hot water preheated by the secondary heat exchanger 34 is supplied to the primary heat exchanger 35. The hot water supplied to the primary heat exchanger 35 is heated by recovering the sensible heat of the combustion gas generated in the combustion device 36. The hot water heated by the primary heat exchanger 35 is supplied to the outside of the hot water device 30 through the hot water outlet pipe 32.

Further, water is supplied and controlled from the water supply pipe 31 to the hot water outlet pipe 32 through the bypass pipe 33. As a result, the temperature of the hot water in the hot water outlet pipe 32 is adjusted. Hot water adjusted to a desired temperature is supplied from the hot water outlet pipe 32.

The hot water device 30 may be, for example, a hot water supply device, a heating device, a bath hot water supply device with hot water heating, or the like. Further, the hot water device 30 may be a method of burning fuel gas or a method of burning petroleum. Further, the hot water device 30 may be a hot water storage type or an instantaneous type.

<Effect of this embodiment>
When excessive air is sucked by the blower device 10, vibration is generated in combustion, and so-called vibration combustion may occur. In order to suppress this vibration combustion, the intake diameter of the blower device 10 is reduced by the bell mouth. However, simply reducing the intake diameter with the bell mouth causes a difference in diameter between the intake diameter of the bell mouth and the inner diameter defined by the inner peripheral ends of the plurality of blade plates 1. When such a difference in diameter occurs, a vortex is likely to be generated in the air sucked into the blower 10, and the vortex causes noise.

Therefore, by extending each of the plurality of blade plates 1 toward the inner peripheral side in order to reduce the difference in diameter, the inner diameter defined by the inner peripheral end of the plurality of blade plates 1 is also reduced. However, when each of the plurality of blade plates 1 is extended to the inner peripheral side, the pitch in the circumferential direction of the blade plates 1 becomes small, and the generation of noise becomes remarkable due to a slight irregularity in the pitch in the circumferential direction of the blade plates 1.

In view of the above, as shown in FIG. 4, according to the present embodiment, the second end 1S of the blade plate 1 is located on the inner peripheral side of the inner peripheral end 1fe of the first end 1F of the blade plate 1. It is fixed to the face plate 2 by being inserted into the slit portion 2c. As a result, it is possible to prevent the inner peripheral portion of the second end 1S of the blade plate 1 from being displaced in the circumferential direction. Therefore, the pitches of the plurality of blade plates 1 in the circumferential direction are easily aligned, and the noise caused by the pitches of the blade plates 1 in the circumferential direction can be reduced.

Further, the second end 1S of the blade plate 1 is a recess of the face plate 2 (slit portion 2c (FIG. 4), recess 2ca (FIG. 8) at a position on the inner peripheral side of the face plate 2 with respect to the inner peripheral end 1fe of the first end 1F. ), It is only inserted into the concave portion (FIG. 9) between the convex portions 2cc and is not crimped to the face plate 2. Therefore, the deformation of the face plate 2 due to caulking can be prevented, and the generation of noise due to the deformation of the face plate 2 can be prevented.

Further, the air sucked by the blower 10 passes through the side closer to the face plate 2 than the shroud 3 in the impeller 4 and is blown out to the outer peripheral side of the impeller 4. Therefore, the second end 1S of the blade plate 1 is inserted into the slit portion 2c of the face plate 2 and fixed to the face plate 2, so that noise can be effectively prevented.

Further, according to the present embodiment, as shown in FIG. 4, the blade plate 1 has a claw portion 1N protruding toward the face plate 2 at a position on the inner peripheral side of the face plate 2 from the inner peripheral end of the first end 1F. Have at the end 1S. The face plate 2 is provided with a slit portion 2c into which the claw portion 1N is inserted. As a result, the noise caused by the irregular pitch in the circumferential direction of the blade plate 1 can be reduced by a simple configuration in which the claw portion 1N is inserted into the slit portion 2c. Further, since the claw portion 1N is only inserted into the slit portion 2c and is not crimped to the face plate 2, deformation of the face plate 2 due to caulking is prevented.

Further, as shown in FIG. 4, if the claw portion 1N is caulked to the face plate 2 in the recessed central portion CP of the face plate 2, the face plate 2 may be deformed in the recessed central portion CP. A shaft hole 2d for inserting the rotation shaft 5b of the drive source 5 is provided in the central portion CP of the face plate 2. Therefore, when the recessed central portion CP is deformed, the circumferential runout in the axial direction of the face plate 2 becomes large when the impeller 4 rotates, and noise due to the circumferential runout is generated.

On the other hand, according to the present embodiment, as shown in FIG. 4, the claw portion 1N is only inserted into the slit portion 2c of the recessed central portion CP and is not crimped to the face plate 2. Therefore, the deformation of the face plate 2 due to caulking is prevented in the central portion CP, and the noise caused by the circumferential runout of the face plate 2 in the axial direction is prevented.

Further, according to the present embodiment, as shown in FIG. 7, the claw portion 1N has a base portion BP and a tip portion TP. The width W of the claw portion 1N becomes smaller toward the tip portion TP from the base portion BP side. As a result, the claw portion 1N can be smoothly inserted into the slit portion 2c. Therefore, the assemblability between the blade plate 1 and the face plate 2 is improved.

Further, according to the present embodiment, as shown in FIG. 4, the second end 1S of the blade plate 1 is inserted into the slit portion 2c at a position on the inner peripheral side of the face plate 2 with respect to the protrusions 1sa and 1sb. It is fixed to the face plate 2. As a result, it is possible to prevent the inner peripheral portion of the second end 1S of the blade plate 1 from being displaced in the circumferential direction. Therefore, the pitches of the plurality of blade plates 1 in the circumferential direction are easily aligned, and the noise caused by the pitches of the blade plates 1 in the circumferential direction can be reduced.

Further, the second end 1S of the blade plate 1 is a recess of the face plate 2 (slit portion 2c (FIG. 4), recess 2ca (FIG. 8) at a position on the inner peripheral side of the face plate 2 with respect to the inner peripheral end 1fe of the first end 1F. ), It is only inserted into the concave portion (FIG. 9) between the convex portions 2cc and is not crimped to the face plate 2. Therefore, the deformation of the face plate 2 due to caulking can be prevented, and the generation of noise due to the deformation of the face plate 2 can be prevented.

Further, according to the present embodiment, as shown in FIG. 10, the combustion device 36 of the hot water device 30 generates combustion gas using the combustion air supplied by the blower device 10. Further, each of the secondary heat exchanger 34 and the primary heat exchanger 35 exchanges heat with the combustion gas supplied by the combustion device 36. As a result, it is possible to realize a hot water device 30 with reduced noise.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 blade plate, 1F 1st end, 1N claw part, 1S 2nd end, 1fe, 1se inner peripheral end, 1fa, 1fb, 1sa, 1sb protrusion part, 2 face plate, 2a, 2b, 2c, 3a, 3b slit part, 2ca concave, 2cc convex, 2d shaft hole, 3 shroud, 3c hole, 4 impeller, 5 drive source, 5a main body, 5b rotating shaft, 6 fan case, 6S internal space, 6a suction port, 10 blower, 30 Hot water device, 31 Water supply pipe, 32 Hot water pipe, 33 Bypass pipe, 34 Secondary heat exchanger, 35 Primary heat exchanger, 36 Combustor, 37 Exterior case, AX axial direction, BP base, CP center part, PP circumference Part, TP tip.

Claims (6)

A blade plate having a first end and a second end facing each other,
A disk-shaped shroud arranged on the first end side of the blade plate and having a hole through which air passes in the center.
A disk-shaped face plate arranged on the second end side of the blade plate and having a recess is provided.
The second end of the blade plate is fixed to the face plate by being inserted into the recess at a position on the inner peripheral side of the face plate with respect to the inner peripheral end of the first end. The blade plate has a claw portion protruding toward the face plate at a position on the inner peripheral side of the face plate from the inner peripheral end of the first end at the second end.
The blower according to claim 1, wherein the recess is composed of a slit portion, and the claw portion is inserted into the slit portion. The face plate has a central portion and a peripheral portion that surrounds the periphery of the central portion.
The central portion is recessed toward the shroud side.
The blower according to claim 2, wherein the slit portion is provided in the central portion of the face plate. The claw portion has a base portion and a tip portion, and has a claw portion.
The blower according to claim 2 or 3, wherein the width of the claw portion becomes smaller toward the tip portion from the base side. A blade plate having a first end and a second end facing each other,
A disk-shaped shroud arranged on the first end side of the blade plate and having a hole through which air passes in the center.
A disk-shaped face plate arranged on the second end side of the blade plate and having a recess is provided.
The blade plate has a protrusion that is crimped to the face plate.
A blower device in which the second end of the blade plate is fixed to the face plate by being inserted into the recess at a position on the inner peripheral side of the face plate with respect to the protrusion. The blower according to any one of claims 1 to 5, and the blower
A combustion device that generates combustion gas using the combustion air supplied by the blower, and
A hot water device including a heat exchanger that exchanges heat with the combustion gas supplied by the combustion device.

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