JP6657908B2 - Blower and hot water supply device provided with the same - Google Patents

Description

  The present invention relates to a blower, such as a centrifugal blower, of a type in which an impeller accommodated in a casing is supported and rotated by a motor, and a hot water supply device including the same.

As an example of a blower used as a component of a hot water supply device or the like, there is one described in Patent Document 1.
In the blower described in the document, a motor that rotatably supports the impeller is screwed to a mounting plate portion of a casing that houses the impeller.

However, there is room for improvement in the prior art as described below.
First, screwing work at a plurality of locations is complicated when mounting the motor. Therefore, it cannot be said that the assembling workability is very good.
Secondly, in order to make the mounting state of the motor to the casing strong and reliable, it is necessary to use screws having a certain length or more. For this reason, the tip end side of the screw protrudes from the mounting plate portion into the casing with a relatively long dimension. As a result, when the screw stop point is a point facing the impeller, it is necessary to separate the impeller from the screw and the mounting plate so that the screw and the impeller do not interfere with each other. The width of the gap with the plate must be increased. However, when the width of the gap is increased as described above, the blowing efficiency of the blowing device decreases.

JP 2006-17057 A

  The present invention has been conceived in view of the circumstances described above, and a blower that can easily and inexpensively perform an assembling operation of a motor and that can increase the blow efficiency, and It is an object of the present invention to provide a hot water supply device provided with the hot water supply device.

  In order to solve the above problems, the present invention takes the following technical measures.

A blower provided by a first aspect of the present invention includes a motor that rotatably supports an impeller and has a flange portion for attachment at a front portion, and a motor attached to a casing that houses the impeller therein. Or a mounting plate portion provided so as to constitute a part of the casing, and the motor is mounted on an outer surface portion, and as a means for mounting the motor to the mounting plate portion, on the flange portion of the motor. projections provided are and a caulking portion caulked has been subjected to insertion into the hole portion provided in the mounting plate portion, a blower, as the flange portion of the motor, with each other It is provided with an overlapping first and second flange portion, and the projection portion is provided on the second flange portion so as to protrude in a direction opposite to the first flange portion side. In addition, the protrusion is configured to have therein a recess that opens to the first flange side, and a portion of the first flange that faces the recess is located in the hole. It is characterized in that, by being pushed in, the caulking portion is provided with a caulking portion in which the protruding portion is pressed against and engaged with the inner peripheral surface of the hole and the peripheral edge thereof .

According to such a configuration, the following configuration is obtained.
First, when mounting the motor to the mounting plate, complicated screw fixing work is not required. Since the caulking portion is formed by using a projection provided on the flange portion of the motor, another component such as a screw is not required. Therefore, the manufacturing cost of the blower can be reduced as compared with the related art by facilitating the manufacturing operation and reducing the number of parts.
Secondly, the mounting means using the caulking portion is different from the screwing means, so that the motor can be securely mounted and fixed without projecting a large dimension inside the mounting plate portion, and the casing can be fixed. The protrusion dimension of the crimped portion inward can be reduced. For this reason, even when the caulking portion is provided at a portion facing the impeller, the impeller is separated from the caulking portion or the mounting plate portion by a large dimension in order to avoid interference between the impeller and the caulking portion. It is not necessary, and the width of the gap between the impeller and the mounting plate can be set small. As a result, it is possible to increase the air blowing efficiency as compared with the related art.

  In the present invention, preferably, the motor has a front opening, and a motor case main body in which a first flange portion is continuously provided, and a second flange overlapping a front side of the first flange portion. And a cover plate attached to the motor case main body so as to close the front opening. The protrusion forming the caulking portion includes the first and second flanges. Of the parts, it is provided only on the second flange part.

  According to such a configuration, of the first and second flange portions provided in the motor, only the second flange portion on the side directly in contact with the mounting plate portion is efficiently and rationally used. Thus, the motor can be properly mounted.

  In the present invention, preferably, the casing has a side plate portion provided with an opening through which the impeller can pass when the impeller is housed in the casing, and the mounting plate portion The motor is mounted on the side plate so as to cover the whole or substantially the entire opening together with the motor.

  According to such a configuration, it is easy to use an impeller having a larger diameter than the motor, and it is suitable for designing so that a large amount of air can be obtained while using a small-sized motor. Becomes

  In the present invention, preferably, the mounting plate portion is screwed to the casing at a position not opposed to the impeller, and a projecting dimension of the caulking portion from the mounting plate portion into the casing is as described above. It is smaller than the screw protrusion dimension into the casing at the time of screwing.

  According to such a configuration, it is more preferable to avoid interference between the caulking portion and the impeller.

  A hot water supply apparatus provided by the second aspect of the present invention includes a burner, a blower for supplying combustion air to the burner, and heating of hot water using a combustion gas generated by the burner. And a heat exchanger, wherein the blower provided by the first aspect of the present invention is used as the blower.

  According to such a configuration, an effect similar to that described for the blower provided by the first aspect of the present invention can be obtained.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings.

(A) is a rear view which shows an example of a blowing device, (b) is the Ib-Ib line sectional drawing of (a). FIG. 2 is an exploded sectional view of FIG. (A)-(c) is principal part sectional drawing which shows an example of the formation process of the crimping part provided in FIG.1 and FIG.2. (A), (b) is principal part sectional drawing which shows the example of the formation process of the crimp part applied in this invention . It is a schematic explanatory view showing an example of a hot water supply device concerning the present invention.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  The blower A shown in FIGS. 1 and 2 is of a sirocco type, and has an impeller 1, a casing 2 for accommodating the impeller 1, and an impeller so that the impeller 1 can be supported and driven to rotate. The vehicle 1 includes a motor 3 having a drive shaft 30 at a front portion to which the vehicle 1 is mounted, and a mounting plate 4 used for mounting the motor 3. The mounting of the motor 3 to the mounting plate portion 4 is performed using a plurality of caulking portions 33.

  The casing 2 has a main body 20 surrounding the outer periphery of the impeller 1, a pair of side plates 21, 22 assembled on both sides of the main body 20, an intake port 23, a blow port 24, and one side plate. 21 has an opening 21a for impeller passage. The opening 21 a is a part that allows the impeller 1 to pass through when the impeller 1 is accommodated in the casing 2 during the assembling work of the blower A, and has a larger diameter than the impeller 1.

  The motor 3 includes a motor case main body 34 having a front opening shape for housing an electromagnetic coil for rotating the drive shaft 30 and other main devices therein, and a motor case body for closing the front opening portion 34b of the motor case main body 34. And a cover plate 35 joined to the front side of the main body 34. A first flange portion 34a is continuously provided at a front portion of the motor case main body 34, and a region near an outer peripheral edge of the cover plate 35 has a second flange portion 35a overlapping the front side of the first flange portion 34a. It has become.

  The plurality of caulking portions 33 are configured using the protrusions 36. As shown in FIGS. 2 and 3A, the protrusion 36 is a portion where a part of the second flange 35a of the motor 3 protrudes, and the second flange 35a is connected to the first flange 34a. This is a portion formed by pressing the second flange portion 35a at a stage where the second flange portion 35a is not overlapped. The protrusion 36 is inserted into a hole 40 provided in the mounting plate 4 as shown in FIG. 3 (b), and then, as shown in FIG. In this case, crushing is performed. As a result, the caulked portion 33 is formed, and the motor 3 is fixedly attached to the mounting plate 4 via the caulked portion 33. The mounting plate portion 4 is provided with an opening 41 for avoiding interference with the drive shaft 30 of the motor 3 and the protruding portion 30a in the vicinity thereof.

  The mounting plate 4 is formed to have a larger diameter than the impeller 1, and the outer peripheral edge of the mounting plate 4 is mounted on the side plate 21 of the casing 2 using a plurality of screws 5. Each screw 5 is arranged so as not to face the impeller 1. On the other hand, each caulking portion 33 is arranged to face the impeller 1. The protrusion La of the caulking portion 33 from the mounting plate portion 4 into the casing 2 is smaller than the protrusion Lb of the screw 5 from the side plate portion 21 into the casing 2.

The blower A described above is used, for example, as a component of a water heater WH as shown in FIG.
The hot water supply device WH shown in FIG. 1 includes a burner 8 and a heat exchanger 9 that performs hot water heating using the combustion gas generated by the burner 8. It is provided so that combustion air can be supplied.

  Next, the operation of the blower A will be described.

  First, since the mounting of the motor 3 to the mounting plate portion 4 is performed using the caulking portion 33, complicated screw fixing work is not required. Since the caulking portion 33 is formed by using the protrusion 36 provided by processing the second flange portion 35a of the motor 3, another component for forming the caulking portion 33 is unnecessary. Therefore, it is possible to simplify the manufacturing operation and reduce the manufacturing cost by reducing the number of parts. In the present embodiment, of the first and second flange portions 34a and 35a of the motor 3, only the second flange portion 35a is provided with the protruding portion 36 constituting the caulking portion 33. The processing is easier and more rational than the case where the protrusions are provided on both of the two flange portions 34a and 35a.

  The protrusion La of the caulking portion 33 into the casing 2 is reduced. For this reason, it is not necessary to increase the width Lc of the gap 6 between the mounting plate portion 4 and the impeller 1 for the purpose of avoiding interference between the caulking portion 33 and the impeller 1. In the air blower A, the larger the width Lc of the gap 6, the lower the air blowing efficiency. However, according to the present embodiment, it is possible to reduce the width Lc and improve the air blowing efficiency (however, FIG. 1). In (b), the width Lc is not shown to be very small to facilitate understanding of the structure.) Further, if the width Lc is reduced, the entire casing 2 can be made thinner.

FIG. 4 shows an example of a forming process of a caulking portion for mounting the motor 3 on the mounting plate portion 4 applied in the present invention .
First, the configuration shown in FIG. 4A is the same as the configuration shown in FIG. 3B, and the protrusion 36 formed on the second flange portion 35a is 40 is inserted. Thereafter, as shown in FIG. 3B, a portion of the outer surface of the first flange portion 34a corresponding to the portion behind the protrusion 36 is pressed toward the protrusion 36, and the outer surface of the first flange 34a is pressed. Push into the recess 36a. As a result, the diameter of the protruding portion 36 is increased, and a caulked portion 33A is formed which is pressed against and engaged with the inner peripheral surface of the hole 40 and the peripheral edge thereof.
According to the caulking portion 33A having such a configuration, the caulking process for the protruding portion 36 can be performed from the first flange portion 34a side. Matches. Therefore, the work of attaching the motor 3 to the attachment plate portion 4 can be efficiently performed from one direction.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the blower and the hot water supply device according to the present invention can be variously changed within a range intended by the present invention.

In the above embodiment, the mounting plate to which the motor is mounted is a member that is mounted to the side plate of the casing that houses the impeller, but the present invention is not limited to this. The mounting plate in the present invention may be configured as a member that forms a part of the casing. That is, in the present invention, for example, similarly to FIG. 3 of Patent Document 1, it is possible to adopt a configuration in which the motor is directly attached to the side plate portion of the casing. In this case, the side plate to which the motor is directly attached The part corresponds to the mounting plate part in the present invention.
The blower according to the present invention is not limited to the sirocco type. Therefore, the specific shapes of the impeller, the casing, and the like are not limited.

A blower WH water heater 1 impeller 2 casing 21a opening (for impeller passage)
3 Motor 33, 33A Caulking part 34 Motor case main body 34a First flange 35 Cover plate 35a Second flange (flange)
36 Projection 4 Mounting plate 40 Hole 8 Burner 9 Heat exchanger

Claims (5)

A motor that rotatably supports the impeller and has a flange portion for attachment at a front portion,
A mounting plate portion attached to a casing accommodating the impeller therein, or provided to constitute a part of the casing, and the motor is attached to an outer surface portion,
As a means for attaching the motor to the attachment plate portion, a crimped portion in which a protrusion provided on the flange portion of the motor is inserted into a hole provided on the attachment plate portion and subjected to caulking processing,
A blower comprising:
The motor includes a first and a second flange portion overlapping each other as the flange portion, and the second flange portion has the protrusion protruding in a direction opposite to the first flange portion. Being provided, the projecting portion is configured to have a concave portion that opens on the first flange portion side therein.
A portion of the first flange portion facing the concave portion is pressed into the concave portion, so that the protrusion presses against the inner peripheral surface of the hole portion and its peripheral edge as the caulking portion. A blower, comprising a caulking portion engaged with the blower. The blower according to claim 1,
The motor includes a motor case main body having a front opening, and a first flange portion continuously provided, and a second flange portion overlapping a front side of the first flange portion, and A cover plate attached to the motor case body so as to close the front opening,
The blower, wherein the protruding portion constituting the caulking portion is provided only on the second flange portion of the first and second flange portions. The blower according to claim 1 or 2,
The casing has a side plate portion provided with an opening through which the impeller can pass when the impeller is accommodated in the casing,
The blower, wherein the mounting plate portion is attached to the side plate portion so as to cover all or substantially the entire opening together with the motor. The blower according to any one of claims 1 to 3,
The mounting plate portion is screwed to the casing at a location that does not face the impeller,
A blower, wherein a projecting dimension of the caulking portion from the mounting plate portion into the casing is smaller than a screw projecting size into the casing at the screw stop. A hot water supply device comprising: a burner; a blower for supplying combustion air to the burner; and a heat exchanger for heating hot water using the combustion gas generated by the burner. hand,
A hot water supply device, wherein the blower device according to any one of claims 1 to 4 is used as the blower device.

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