JP6879077B2 - Combustion device - Google Patents

Description

The present invention relates to a combustion device suitable for use as a component of a hot water supply device or the like.

Some hot water supply devices have a general hot water supply function and a hot water supply function for bathing or hot water heating. As a combustion device used as a component of such a hot water supply device, there are two sets of a burner case containing a burner and a fan for supplying combustion air to the burner case. (See, for example, Patent Document 1). Of these two combinations of the burner case and the fan, one is used for hot water heating for general hot water supply, and the other is used for hot water heating for bath or hot water heating.

The combustion device as described above is a so-called two-can two-fan system, but there are problems to be solved as described below.

That is, it is required to reduce the manufacturing cost of the combustion device. As a means for responding to this demand, it is effective to promote the standardization of the components of the two fans and the standardization of the mounting structure of the fan to the burner case. However, if such commonality is promoted, the overall shape and size of the two fans will be the same or similar, so that it is easy for the fans to be misunderstood. In addition, if the fan is mistaken, the fan cannot be mounted on the burner case in general, but if the common mounting structure is promoted, the fan is mistakenly mounted on the burner case, unlike the above. Work mistakes such as being done can also occur. Such a situation causes a decrease in productivity and causes an increase in manufacturing cost, and is therefore desired to be eliminated.

Japanese Unexamined Patent Publication No. 11-21128

The present invention has been conceived under the above-mentioned circumstances, and appropriately prevents or suppresses the possibility that the fan may be mistakenly assembled in the burner case in an incorrect state by means having a simple configuration. The challenge is to provide a combustion device that is capable of this.

In order to solve the above problems, the following technical measures are taken in the present invention.

The combustion apparatus provided by the present invention is attached to the first and second burner cases accommodating the burners and the first and second burner cases, respectively, and into the first and second burner cases. A combustion device comprising first and second fans for supplying air, wherein the first and second fans are outside the fan case on the outer surface of these fan cases. It comprises a pair of projecting piece forming members formed with first and second projecting pieces that partially project toward the direction, the first and second projecting pieces having a shape, size, and the fan. When at least one of the protruding positions in the case is different from each other and the first fan is brought close to the fan mounting portion of the second burner case, the first protruding piece is the second burner. It is characterized in that it interferes with the case and prevents the first fan from being attached to the second burner case.

According to such a configuration, the following effects can be obtained.
That is, the first and second projecting pieces that partially project on the outer surface of the fan case of the first and second fans are easy to recognize. Further, since these first and second projecting pieces differ in at least one of the shape, size, and protruding position in the fan case, the first and second projecting pieces are based on the first and second projecting pieces. It is possible to easily and clearly distinguish the types of the two fans, and it is possible to prevent them from being mistaken for each other during the assembly work of the combustion device. Further, if the first fan is erroneously attached to the second burner case, the first protruding piece interferes with the second burner case and its attachment is prevented. Therefore, when the components of the first and second fans are standardized and their appearances are similar, or when the appearances of the first and second fans are similar to each other, or when the first and second fans are used for the first and second burner cases, respectively. Even when the common mounting structure is promoted, it is preferably avoided to assemble the first and second fans in an erroneous correspondence with respect to the first and second burner cases. As a result, it is possible to increase the productivity of the combustion device and reduce the manufacturing cost.

In the present invention, preferably, the first and second projecting pieces display information for identifying the first and second fans.

With such a configuration, it is possible to more clearly recognize the types of the first and second fans, and it is possible to more thoroughly prevent them from being mistaken for each other.

In the present invention, preferably, the first burner case has a width smaller than that of the second burner case, and the first protruding piece has the first fan as the first burner case. In the state of being attached to the first burner case, the first burner case is provided so as to be located next to the first burner case and extend to a position higher than the bottom wall portion of the first burner case. When the fan is brought close to the mounting portion of the second burner case, the first protruding piece is configured to interfere with the bottom wall portion of the second burner case.

According to such a configuration, the difference in width between the first and second burner cases is utilized so that the first protruding piece does not interfere with the first burner case, while the second burner case Is designed to interfere. Therefore, it is not necessary to perform special processing on the first and second burner cases to correspond to the first protruding piece, and the structure can be simplified.

In the present invention, preferably, each fan case of the first and second fans includes a fan case main body portion that houses an impeller inside and forms an intake port and a discharge port, and the fan case. A bell mouth forming member that is attached to the main body and forms a bell mouth that is arranged so as to overlap the intake port is provided, and the bell mouth forming member is a projecting piece forming member. ing.

According to such a configuration, the first and second projecting pieces are provided by using the bell mouth forming member, and it is not necessary to use a dedicated member as the projecting piece forming member. Therefore, the configuration is rational, and an increase in the number of parts can be suppressed.

In the present invention, preferably, at least one of the front wall portion, the peripheral wall portion, and the rear wall portion of the fan cases of the first and second fans has a shape, a size, and a material of each other. It is the same.

According to such a configuration, it is preferable to promote the commonality of the components of the first and second fans and reduce the manufacturing cost thereof. If the standardization of the components of the first and second fans is promoted, the appearances of these will be similar to each other, and therefore there is a greater possibility that they will be mistaken for each other. The presence of the first and second overhangs can adequately eliminate such fears.

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.

It is a main part perspective view which shows an example of the combustion apparatus which concerns on this invention. It is a front view of FIG. It is an exploded front view of FIG. It is a rear view of FIG. FIG. 4 is an exploded rear view of FIG. It is sectional drawing of the fan used in the combustion apparatus shown in FIG.

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

The combustion apparatus C shown in FIG. 1 includes first and second burner cases 1A and 1B having open top surfaces arranged side by side, and first and second fan FAs attached to the bottom walls thereof. It has FB. A plurality of burners 3 (gas combustion pipes) for burning fuel gas are housed inside the first and second burner cases 1A and 1B. As the burner 3, for example, a known one described in JP2013-242080A is used, and the description thereof will be omitted. The first and second fans FA and FB are for supplying combustion air to a plurality of burners 3.

This combustion device C is used, for example, as a component of a hot water supply device. Although not shown, a heat exchanger for heating hot water for bath hot water supply or heating hot water supply is mounted on the first burner case 1A, and it is possible to heat the heat exchanger. A heat exchanger for heating hot water for general hot water supply is mounted on the second burner case 1B, and it is possible to heat the heat exchanger. Hot water heating for bath hot water supply or heating hot water supply requires a smaller amount of heating than hot water heating for general hot water supply. Therefore, the number of the burners 3 housed in the first burner case 1A is smaller than that of the second burner case 1B, and the size in the width direction is reduced.

The first and second fans FA and FB are centrifugal type. As shown in FIG. 6, the first fan FA includes an impeller 2, a fan case 4 accommodating the impeller 2, and a motor M that supports and rotates the impeller 2. The fan case 4 includes a fan case main body 40, a motor lid plate 41, and a bell mouth forming member 5a. The fan case main body 40 includes a peripheral wall portion 40a that surrounds the periphery of the impeller 2, and a front wall portion 40b and a rear wall portion 40c that face each other so as to sandwich the peripheral wall portion 40a and the impeller 2 in the front-rear direction. An intake port 42 is formed in the rear wall portion 40c, and a discharge port 43 is formed in the upper portion. The motor lid plate 41 is a member for closing the motor mounting opening 44 provided in the front wall portion 40b, and is mounted on the front wall portion 40b using screws 80. The bell mouth forming member 5a is a plate-shaped member having a bell mouth 50 formed in the central portion thereof, and is attached to the rear wall portion 40c by using a screw 81 so that the bell mouth 50 overlaps the intake port 42.

The second fan FB is specified to have a larger maximum air volume than the first fan FA, but its basic configuration is the same as that of the first fan FA described above (in each figure, the first fan FA). Of the two fan FBs, the same or similar parts as the first fan FA are designated by the same reference numerals). Although the detailed cross-sectional structure of the second fan FB will not be illustrated, the impeller 2 of the second fan FB has a common impeller 2 as compared with the first fan FA shown in FIG. In addition, the rear wall portion 40c and the peripheral wall portion 40a of the fan case 4 are also standardized, and their shapes, sizes, and materials are the same for the first fan FA and the second fan FB. Therefore, the appearances of the first and second fans FA and FB are similar to each other. As shown in FIGS. 2 and 3, as a means for preventing the motor lid plate 41 from being mistakenly attached to the front wall portion 40b between the first and second fans FA and FB. The screw fixing positions (positions of the screws 80a and 80b) on the front wall portion 40b are different from each other. The screw fastening points other than the above on the motor lid plate 41 are arranged in the same arrangement as each other.

In the second fan FB, instead of the bell mouth forming member 5a shown in FIG. 6, another bell mouth forming member 5b is attached to the rear wall portion 40c. The opening diameters Da and Db of the bell mouths 50 of the two bell mouth forming members 5a and 5b are different from each other, and the amount of intake air into the fan case 4 is determined by the first and second fans FA and FB. It is set to be optimal for the air blowing capacity.

First and second protruding pieces 51a and 51b are formed on the bell mouth forming members 5a and 5b. In the present embodiment, the bell mouth forming member 5a corresponds to the "protruding piece forming member" in the present invention. The first and second projecting pieces 51a and 51b partially protrude outward from other parts of the bell mouth forming members 5a and 5b, as is well represented in FIGS. 4 and 5. It has a shape, and is set to protrude outward from the rear wall portion 40c of the fan case main body 40 in the rear view. Also in the front view shown in FIGS. 2 and 3, the first and second protruding pieces 51a and 51b are in a state of protruding outward from the fan case main body 40 (one of the second protruding pieces 51b). The part is hidden behind the front wall part 40b, but the other parts are protruding).

At least the front surfaces of the first and second projecting pieces 51a and 51b are provided with first and second fan FAs and FBs such as the type, output, or production lot number of the first and second fan FAs and FBs. Information I for identification (abbreviated as a symbol of "X" and "Y" in the drawing) is displayed by using an appropriate means such as engraving. The first and second projecting pieces 51a and 51b have different arrangements on the outer surface of the fan case 4, and the former has an upward projecting shape, while the latter has an obliquely upward projecting shape. Therefore, in addition to the above-mentioned information I, the first and second fans FA and FB are distinguished by the difference in the positions of the first and second protruding pieces 51a and 51b.

As shown in FIGS. 2 and 3, bracket portions 10a to 10c are provided in the lower front portions of the first and second burner cases 1A and 1B, and the screws 82 and the screw fixing holes 12a are provided. It is possible to attach the upper front side of the first and second fans FA and FB by using ~ 12c and 48a to 48c. The bracket portions 10a and 10b are standardized. On the other hand, as shown in FIGS. 4 and 5, bracket portions 11a and 11b are provided in the lower rear portions of the first and second burner cases 1A and 1B, and the screws 83 and the screw fixing holes are provided. The rear upper portion of the first and second fans FA and FB can be attached by using the portions 13a, 13b, 49a and 49b. The bracket portions 11a and 11b are standardized.

As is well shown in FIG. 4, when the first fan FA is attached to the first burner case 1A, the first protruding piece 51a does not interfere with the first burner case 1A. It is located next to the burner case 1A of 1. Further, the first protruding piece 51a is in a state of extending upward to a position higher than the bottom wall portion of the first burner case 1A. On the other hand, the width of the second burner case 1B is wider than that of the first burner case 1A, as described above. As a result, when the first fan FA is brought close to the bottom wall of the second burner case 1B in an attempt to attach it to the second burner case 1B, the first protruding piece 51a becomes the second. It interferes with the bottom wall portion of the burner case 1B, and the attachment of the first fan FA to the second burner case 1B is prevented.

Next, the operation of the above-mentioned combustion device C will be described.

First, the first and second projecting pieces 51a and 51b are provided so as to be easily recognized, and their arrangements are different. Therefore, by confirming the positions of the first and second protruding pieces 51a and 51b, the first and second fans FA and FB can be easily distinguished. Since predetermined information I is displayed on the first and second projecting pieces 51a and 51b, if this information I is confirmed, the recognition and distinction of the first and second fans FA and FB are clearer. You will be able to go to. Therefore, it is appropriately prevented or suppressed that the first and second fans FA and FB are mistaken for each other.

Despite the provision of the first and second protruding pieces 51a and 51b as described above, there is a possibility that the first and second fans FA and FB may be mistaken for each other in the manufacturing process of the combustion device C. is there. However, even if such a mistake occurs, as described above, when the first fan FA is attached to the second burner case 1B, the first protruding piece 51a interferes with the second burner case 1B. It is blocked by doing. Although the second fan FB can be attached to the first burner case 1A, the bracket portion 10c is left over, so that the operator easily notices such an erroneous attachment. In any case, if the first fan FA cannot be attached to the second burner case 1B, the first and second fan FAs and FBs are attached to the first and second burner cases 1A and 1B. Will not be installed in the wrong combination. As a result, the mistakes in assembling the first and second fans FA and FB can be appropriately eliminated, and the productivity of the combustion device C can be increased.

Further, according to the present embodiment, the first and second fan FAs and FBs can be appropriately attached to the first and second burner cases 1A and 1B, but the bell mouth is attached to the fan case 4. Even when the first fan FA is provided with the second protruding piece 51b and the second fan FB is provided with the first protruding piece 51a due to the forming member 5a being erroneously attached. It becomes difficult to properly attach the first and second fans FA and FB to the first and second burner cases 1A and 1B. Therefore, it is found that the bell mouth forming members 5a and 5b having a correct correspondence relationship are not attached to the fan case 4, and it is possible to prevent and find the assembly error of the bell mouth forming members 5a and 5b.

The present invention is not limited to the contents of the above-described embodiments. The specific configuration of each part of the combustion apparatus according to the present invention can be variously redesigned within the scope intended by the present invention.

In the above-described embodiment, the first burner case and fan are used for bath hot water supply or heating hot water supply, and the second burner case and fan are used for general hot water supply, but the present invention is not limited thereto. .. Contrary to the above-described embodiment, the first burner case and fan may be used for general hot water supply, and the second burner case and fan may be used for bath hot water supply or heating hot water supply. Further, the combustion device according to the present invention is not limited to the hot water supply device, and may be configured as a combustion device for a heating device or an incinerator.

In the above-described embodiment, the second fan FB is changed to the first burner case 1A due to an error.
The second protruding piece 51b does not interfere with the first burner case 1A when it is attached to the first burner case 1A, but unlike this, the second protruding piece 51b is the first burner case 1A. It can also be configured to interfere with. According to such a configuration, when the second fan FB is attached to the first burner case 1A, the operator notices the error, and it is possible to detect the work error earlier. is there.

The "protruding piece forming member" referred to in the present invention is not limited to the bell mouth forming members 5a and 5b, and may be configured by using other members. For example, the motor lid plate 41 can be used as a projecting piece forming member. The first and second projecting pieces may differ from each other in shape, size, and at least one of the projecting positions in the fan case.

C Combustion device FA, FB 1st and 2nd fans 1A, 1B 1st and 2nd burner case 3 Burner 4 Fan case 40 Fan case body 40a Peripheral wall 40b Front wall 40c Rear wall 5a, 5b Bellmouth Forming member (protruding piece forming member)
50 Bellmouth 51a, 51b 1st and 2nd overhangs

Claims (5)

The first and second burner cases that house the burners,
A first and second fan attached to the first and second burner cases and for supplying air into the first and second burner cases, respectively.
It is a combustion device equipped with
The first and second fans are a pair of projecting piece forming members formed with first and second projecting pieces that partially project outward from the fan case on the outer surface portion of these fan cases. Is equipped with
The first and second projecting pieces differ from each other in shape, size, and at least one of the projecting positions in the fan case.
When the first fan is brought close to the fan mounting portion of the second burner case, the first protruding piece interferes with the second burner case, and the first with respect to the second burner case. A combustion device characterized in that the installation of the fan of 1 is prevented. The combustion apparatus according to claim 1.
A combustion device in which information for identifying the first and second fans is displayed on the first and second projecting pieces. The combustion apparatus according to claim 1 or 2.
The first burner case has a width smaller than that of the second burner case.
The first protruding piece is located next to the first burner case when the first fan is attached to the first burner case, and is located on the bottom wall portion of the first burner case. It is provided so that it extends to a higher position than
When the first fan is brought close to the mounting portion of the second burner case, the first protruding piece is configured to interfere with the bottom wall portion of the second burner case. Combustion device. The combustion apparatus according to any one of claims 1 to 3.
The fan cases of the first and second fans are attached to and attached to the fan case main body portion that houses the impeller inside and forms the intake port and the discharge port, and the fan case main body portion. It is provided with a bell mouth forming member forming a bell mouth that is arranged so as to overlap the intake port.
A combustion device in which the bell mouth forming member is a projecting piece forming member. The combustion apparatus according to any one of claims 1 to 4.
Of the front wall, peripheral wall, and rear wall of each fan case of the first and second fans, at least one wall has the same shape, size, and material as the combustion. apparatus.

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