JP6179716B2 - Combustion device - Google Patents

Description

  The present invention relates to a combustion apparatus suitable for use as, for example, a component of an instantaneous hot water supply apparatus.

There exists a thing of patent document 1 as this kind of combustion apparatus.
The combustion apparatus described in this document includes a burner case that houses a burner, and a fan that is attached to the bottom of the burner case so as to supply combustion air into the burner case. The fan is, for example, a sirocco fan, and the air discharge port provided at the top of the fan is offset in the horizontal direction from the position of the center of gravity of the fan driving motor attached to the side surface of the fan case. As a means for attaching such a fan to the burner case, a means for connecting the vicinity of the air discharge port of the fan case to a downward standing portion provided at the bottom of the burner case using a plurality of screw bodies. Is adopted. However, among the connecting portions using a plurality of screw bodies, one predetermined connecting portion is arranged so as to be located immediately above the center of gravity of the fan driving motor in a front view of the fan.

  According to such a configuration, the horizontal offset between the center of gravity of the motor for driving the fan and the predetermined connecting portion that supports the weight of the motor can be reduced. The effect that it becomes difficult to transmit to is obtained. Unlike the above, when the fan is attached, only the vicinity of the air discharge port is vaguely connected to the bottom of the burner case, so that a motor having a large weight is largely offset in the horizontal direction with respect to this connection point. Therefore, the vibration of the motor is likely to act greatly on the burner case. According to the prior art, such a situation can be suppressed.

However, there is room for improvement in the prior art as described below.
That is, in the related art, one connecting portion is merely arranged so as to be positioned immediately above the center of gravity of the fan driving motor in a front view. For this reason, the connection strength between the fan and the burner case by the connecting portion is low, and it is difficult to sufficiently suppress the vibration of the motor from being transmitted to the burner case. When the vibration of the motor is transmitted to the burner case, not only the burner case but also various members and devices assembled to the burner case may cause co-vibration. Therefore, it is desired to appropriately improve this.

JP 2006-300418 A

  The present invention has been conceived under the circumstances as described above, and the problem that the vibration of the fan driving motor is transmitted to the burner case is more appropriately suppressed than in the past by a simple configuration. It is an object of the present invention to provide a combustion apparatus that can perform the above-described process.

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

A combustion apparatus provided by the present invention includes a burner case, and a fan for supplying air into the burner case through an opening provided at the bottom of the burner case. A fan driving motor is attached to the outer surface of the fan case, and the center of the air discharge port located in the upper part is horizontally offset from the position of the center of gravity of the motor in the front view of the fan. And a combustion device comprising a plurality of connecting portions in which an upper portion of the fan case is connected to a bottom portion of the burner case using a connecting member, wherein the motor in the front view is used as the plurality of connecting portions. A first connection portion located on the opposite side of the air discharge port across a vertical line passing through the center of gravity of the first connection portion, and closer to the air discharge port side than the first connection portion A second connecting portion is provided with a location, the first and second connecting portions, the distance from the vertical line in a front view are substantially the same, the upper part of the fan case, the An extension region is provided that extends in the direction opposite to the offset direction from the discharge port side tip forming the air discharge port, and the first connection portion is provided at the bottom of the burner case. The extended region is connected .

According to such a configuration, the following effects can be obtained.
That is, the weight of the motor can be borne in a state of being distributed substantially evenly in both the first and second connecting portions. In addition, since the substantial center between the first and second connecting portions is located immediately above the center of gravity of the motor in a front view, the support of the motor by the first and second connecting portions is relative to the center of gravity of the motor. This is performed at a position where the amount of offset in the horizontal direction is small. For this reason, the connecting strength between the fan and the burner case can be increased as compared with the prior art in which one connecting portion is disposed just above the center of gravity of the motor in a front view. As a result, it is possible to suppress the vibration of the motor to be transmitted to the burner case more appropriately than in the prior art, and it is possible to prevent the possibility of co-vibration between various members and devices assembled in the burner case. This is preferable.

Furthermore , according to such a configuration, the first connecting portion can be easily disposed on the side opposite to the air discharge port across the vertical line passing through the center of gravity of the motor, using the extended region. can do.

  In the present invention, preferably, at the bottom of the burner case, there are a plurality of upstanding portions that stand downward from the peripheral edge of the opening, and an auxiliary upright that stands downward at a position spaced from the peripheral edge of the opening. The discharge port side tip is interposed in the inner region of the plurality of upright portions, and the second connecting portion has the discharge port side tip at the plurality of standups. The first connection part connects the extension region to the auxiliary upright part.

  According to such a structure, the 1st and 2nd connection part can be provided appropriately, avoiding complication of the whole structure as much as possible.

  In the present invention, preferably, the fan case includes a strip plate portion having a portion surrounding the fan impeller, and a motor side plate portion joined to one side of the strip plate portion and to which the motor is attached. An inlet side surface plate portion joined to the other side of the belt plate portion, and at least the first connecting portion of the first and second connecting portions is a bottom portion of the burner case. The motor side plate is connected to the motor.

  According to such a configuration, it is possible to directly support the motor side plate portion on which the weight of the motor is directly acting by at least the first connecting portion, which is suitable for supporting the fan with a good weight balance. Become.

  In this invention, Preferably, the said 2nd connection part has connected the said inlet-portion side plate part to the bottom part of the said burner case, and the said 1st and 2nd connection part is a said motor side plate part. It is also spaced apart in the direction facing the inlet side plate.

  According to such a configuration, the first and second connecting portions distribute the weight of the fan including the motor even in the front-rear direction of the fan (the direction in which the motor side plate portion and the intake port side plate portion face each other). It will be borne in the state where it is allowed to. Therefore, it is more suitable for supporting the fan with a good weight balance and preventing these vibrations.

  In the present invention, preferably, as one of the plurality of connecting portions, the first connecting portion is located on the opposite side of the second connecting portion in the front view, and the bottom portion of the burner case And a third connecting portion for connecting the motor side plate portion.

  According to such a configuration, the motor side plate that directly receives the weight of the motor is supported by the first and third connecting portions, and the intake side plate that does not directly receive the weight of the motor is the second connecting portion. It will be in the state supported by. Moreover, the second connecting portion is located between the first and third connecting portions in a front view. When the first to third connecting portions are arranged as described above, the weight burden on each connecting portion is promoted to be uniform, and the fan mounting strength is increased while reducing the total number of connecting portions. And more preferable in terms of stabilization.

  In the present invention, preferably, the connecting members constituting the plurality of connecting portions are arranged at positions avoiding the air discharge ports of the fan and the air passages communicating therewith.

  According to such a configuration, it is possible to prevent the air discharged from the air discharge port from flowing through the fan air passage from hitting the connecting member. For this reason, the malfunction that the flow of the said air becomes a turbulent state and ventilation noise becomes large is suppressed appropriately, and it contributes to the noise reduction at the time of the drive of a combustion apparatus.

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

It is a principal part schematic sectional drawing which shows an example of the combustion apparatus which concerns on this invention. It is a principal part exploded front view of the arrow II of FIG. (a) is a partial cross-sectional front view of the combustion apparatus shown in FIG. 1, (b) is a IIIb-IIIb cross-sectional view of (a), and (c) is a IIIc-IIIc cross-section of (a). FIG. FIG. 2 is a perspective view of a main part in a state in which a bottom part of a burner case of the combustion apparatus shown in FIG. (A) is a perspective view of the fan case of the combustion apparatus shown in FIG. 1, (b) is a schematic exploded perspective view of the fan case shown in (a). It is a principal part exploded front view which shows the other example of this invention.

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

1 to 5 show an embodiment of a combustion apparatus according to the present invention.
In FIG. 1, a combustion apparatus A of the present embodiment is used as, for example, a component of an instantaneous hot water supply apparatus. A burner 1 that burns fuel such as fuel gas, a burner case 2 that houses the burner 1, and A fan F for feeding combustion air into the burner case 2 is provided. A hot water heating heat exchanger (not shown) is mounted on the upper side of the burner case 2, and hot water for hot water supply can be generated by heating the water sent to the heat exchanger.

  The bottom portion 20 of the burner case 2 is provided with an air supply opening 21 formed in, for example, a rectangular shape. As means for attaching the fan F to the bottom portion 20 of the burner case 2, as shown in FIGS. 2 and 4, a plurality of upright portions 22 and auxiliary upright portions 23 are provided. The plurality of standing portions 22 stand downward from the peripheral edge portion of the opening 21 (shown upward in FIG. 4), and are formed by cutting and raising the plate material constituting the bottom portion 20. As the plurality of upright portions 22, a pair of first upright portions 22a facing each other with a space in the left-right width direction of the burner case 2, and a pair of facing each other with a space in the front-back width direction of the burner case 2 There is a second upright portion 22b. The auxiliary upright portion 23 protrudes downward at a position away from the opening 21. The auxiliary upright portion 23 is a portion for connecting an extension region 30c ′ to be described later, and is provided, for example, by welding a member bent in an L shape to the bottom portion 20.

  In FIG. 1, the fan F is a centrifugal fan such as a sirocco fan, for example, and an impeller 40 is accommodated in the fan case 3. The impeller 40 can be driven and rotated by a fan driving motor M attached to one side of the fan case 3. An intake port 41 is provided on one side of the fan case 3 opposite to the motor M. At the upper part of the fan case 3, there is provided a discharge port side front end portion 30 that forms an air discharge port 31 having a rectangular shape in plan view that opens upward. As shown in FIGS. 2 and 3, the center of the air discharge port 31 is offset from the center of gravity of the motor M by a predetermined dimension Lc in the horizontal direction.

  As clearly shown in FIG. 5, the discharge port side tip portion 30 of the fan case 3 basically has four plate-like wall portions 30 a to 30 d joined in a substantially rectangular tube shape, and has an inside thereof. It is the structure which formed the air discharge port 31 and the ventilation path 31a in front of it. However, in this embodiment, the extended region 30c ′ is provided in the plate-like wall portion 30c, and this extended region 30c ′ protrudes from the discharge port side tip portion 30 having a substantially rectangular tube shape to one side thereof. It is dressed up. As will be described later, the extended region 30c 'is a part for providing the first connecting portion J1.

  The fan case 3 includes a band plate portion 34 having a portion surrounding the impeller 40 and a portion serving as a base of the air passage 31a, a motor side plate portion 32 to which the motor M is attached, and an intake port side plate on which the intake port 41 is provided. The unit 33 is configured in combination. These are all formed by pressing a metal plate made of stainless steel or the like, and the strip plate portion 34 is sandwiched between the motor side plate portion 32 and the intake port side plate portion 33 and these. Be joined. The upper region of these members is a portion that forms the discharge port side tip portion 30 described above, and corresponds to the plate-like wall portions 30a to 30d.

  A folded portion 36 is connected to each of the tip portions of the plate-like wall portions 30a and 30b. The folded portion 36 is a portion for press-contacting with the first upright portion 22a. As shown well in FIG. 3A, the folded portion 36 is a portion in which a part of the plate-like wall portions 30 a and 30 b is bent to the side opposite to the air discharge port 31 and folded. A gap C1 is formed between the wall portions 30a and 30b and the non-turned portion 35. The folded portion 36 can be compressed and deformed so as to approach the non-folded portion 35 side.

The fan F is attached to the burner case 2 by interposing the discharge port side tip portion 30 of the fan F in an area surrounded by the first and second upright portions 22a and 22b. In this case, the folded portion 36 is in pressure contact with each of the pair of first upstanding portions 22a. The extended region 30 c ′ of the fan case 3 is brought into contact with the auxiliary upright portion 23. As shown in FIGS. 3B and 4, a gap s <b> 1 is formed between the predetermined upright portions 22. The gap s1 is a part for avoiding interference between the motor side plate part 32 (plate-like wall part 30c) and the standing part 22, and a part of the motor side plate part 32 enters the gap s1. Thus, the second standing portion 22b is set so as to continuously extend from the portion in contact with the second standing portion 22b to the portion in contact with the auxiliary standing portion 23.

As connecting portions for fixing and connecting the fan case 3 to the bottom portion 20 of the burner case 2 using a screw body 90 (corresponding to an example of a connecting member in the present invention), first to third connecting portions J1 to J3 are provided. (A reference numeral 98 in FIG. 2 and other drawings is a hole for inserting a screw body).
The first connecting portion J1 is a connecting portion between the extended region 30c ′ of the motor side plate portion 32 and the auxiliary upright portion 23, and in the front view, with respect to the center of gravity G of the motor and the offset direction of the air outlet 31. Are offset in the opposite direction. The second connecting portion J2 is a connecting portion between the intake port side plate portion 33 and the second upright portion 22b, and is closer to the air discharge port 31 than the vertical line VL passing through the first connecting portion J1 and the center of gravity G. It is. In the front view, the dimensions La and Lb from the vertical line VL to the first and second connecting portions J1 and J2 are substantially the same. The 3rd connection part J3 is a connection part of the motor side surface board part 32 and the 2nd standing part 22b. The first connecting portion J1 is connected to one end side in the left-right width direction of the motor side surface plate portion 32, whereas the third connecting portion J3 is connected to the other end side of the motor side surface plate portion 32. .

  In the second and third connecting portions J2 and J3, the screw body 90 is disposed in the gap C1 between the turned-up portion 36 and the non-turned-up portion 35, and the portion corresponding to the gap C1. Accordingly, the screw body 90 can be disposed outside the air discharge port 31 or the air passage 31 a communicating with the air discharge port 31 while being disposed close to the air discharge port 31.

  Next, the operation of the combustion apparatus A configured as described above will be described.

  First, the weight of the motor can be borne in a state of being distributed substantially evenly in both the first and second connecting portions J1 and J2. Since the approximate center between the first and second connecting portions J1, J2 is located immediately above the center of gravity G of the motor M in a front view, the motor M by the first and second connecting portions J1, J2 The support is performed at a position where the offset amount in the horizontal direction with respect to the center of gravity G of the motor M is small. Therefore, for example, as compared with the case where only one connecting portion is provided immediately above the center of gravity G of the motor M, the connection strength between the fan F and the burner case 2 by the first and second connecting portions J1 and J2 is significantly increased. It is done. As a result, it is possible to appropriately prevent the vibration of the motor M from being transmitted to the burner case 2, and it is also possible to appropriately prevent various members and devices assembled in the burner case 2 from causing co-vibration. The

  The motor side plate 32 is a member that directly receives the weight of the motor M. The motor side plate 32 is supported by two locations, the first and third connecting portions J1 and J3. On the other hand, the air inlet side plate 33 that does not directly receive the weight of the motor M is supported by one place of the second connecting portion J2. The second connecting portion J2 is positioned between the first and third connecting portions J1 and J3. When the first to third connecting portions J1 to J3 are arranged as described above, the respective weight burden ratios of the first to third connecting portions J1 to J3 are made uniform, and the fan F has a good weight balance. Can be fixed and supported. Therefore, even if it has a structure in which only three portions of the first to third connecting portions J1 to J3 are provided as connecting portions, it is possible to increase the mounting strength of the fan F. According to the present embodiment, the assembly work of the fan F can be facilitated and speeded up by reducing the total number of connecting portions.

  In the second and third connecting portions J2 and J3, the screw body 90 is disposed at a position corresponding to the gap C1, and the screw body 90 is not provided in any of the first to third connecting portions J1 to J3. It does not exist in the air discharge port 31 or the air passage 31a communicating with the air discharge port 31. For this reason, it is also appropriately avoided that the air discharged from the air discharge port 31 through the air passage 31a hits the screw body 90 and becomes a turbulent state. As a result, noise caused by air turbulence can also be prevented.

  In addition, in this embodiment, the folding | returning part 36 can be press-contacted to the 1st standing part 22a, and it can set so that an unreasonable gap may not be produced in this part. Therefore, a phenomenon in which a part of the air discharged from the fan F into the burner case 2 leaks outside through the gap can be appropriately suppressed. Further, if the folded portion 36 is brought into pressure contact with the first upright portion 22a, an effect of preventing the fan F from rattling can be obtained. Therefore, the effect of preventing vibration transmission from the fan F to the burner case 2 is further enhanced.

  FIG. 6 shows another embodiment of the present invention. In the figure, the same or similar elements as those in the above embodiment are given the same reference numerals as in the above embodiment.

  In the embodiment shown in FIG. 6, a flange portion 39 is provided on the upper portion of the fan case 3. In a state where the flange portion 39 is in contact with the bottom portion 20 of the burner case 2, the fan F is attached to the bottom portion 20 by inserting the screw body 90 through the screw body insertion hole 91 and the screw hole 92 shown in the figure. I have to. As connection parts used for this attachment, there are first to third connection parts J1 to J3, which pass through the center of gravity G of the motor M from each of the first and second connection parts J1 and J2 in a front view. Dimensions La and Lb up to the vertical line VL are substantially the same. Even with such a configuration, it is possible to obtain the same effect as in the above-described embodiment. In addition, since the lunge 39 is a part used for screwing the fan F, for example, the flange 39 may be formed in a narrow band shape in a plan view in the portion where the first connecting part J1 is provided. Is possible.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the combustion apparatus according to the present invention can be modified in various ways within the intended scope of the present invention.

  In the embodiment described above, the first connecting portion J1 has the motor side surface plate portion 32 as a connection target, and the second connecting portion J2 has the intake side surface plate portion 34 as a connection target. It is not limited. Both the first and second connecting portions J1 and J2 may use the motor side surface plate portion 32 as a connection target. Moreover, although it is not so desirable, the 1st connection part J1 can also be set as the structure which made the inlet port side board part 34 the connection object.

  In the present invention, in addition to the first to third connecting portions J1 to J3 as described above, a fourth connecting portion other than these may be further provided. The standing portion 22 provided on the bottom portion 20 of the burner case 2 may be formed by welding a member separate from the bottom portion 20, for example, instead of being formed by cutting and raising.

  As the fan, it is possible to use a fan other than a sirocco fan. If the air discharge port is a fan offset in the horizontal direction from the center of gravity of the motor, the present invention can be suitably applied. The specific structure of the burner case is not particularly limited, and the burner accommodated in the burner case may be an oil burner instead of the gas burner. The application of the combustion apparatus according to the present invention is not limited. It can be used for applications other than the components of the hot water supply device (for example, a heating device or a combustion incinerator).

A Combustion device F Fans J1 to J3 First to third connecting portions M Motor G Center of gravity (of motor)
2 Burner case 20 Bottom (of burner case)
21 Opening portion 22 (22a) First upright portion 22 (22b) Second upright portion 3 Fan case 30 Discharge port side tip portions 30a to 30d Plate-like wall portion 31 Air discharge port 32 Motor side plate portion 33 Inlet port side Face plate portion 34 Band plate portion 36 Folded portion 90 Screw body (connection member)

Claims (6)

Burner case,
A fan for supplying air into the burner case through an opening provided at the bottom of the burner case;
With
As the fan, a fan driving motor is attached to the outer surface of the fan case, and the center of the air discharge port located in the upper part is horizontally offset from the center of gravity of the motor in a front view of the fan. Is used,
A combustion apparatus comprising a plurality of connecting portions in which the upper part of the fan case is connected to the bottom of the burner case using a connecting member,
As the plurality of connecting portions, a first connecting portion located on the opposite side of the air discharge port across a vertical line passing through the center of gravity of the motor in the front view, and the first connecting portion than the first connecting portion. A second connecting portion located on the air outlet side is provided,
These first and second connecting portions have substantially the same distance from the vertical line in the front view ,
The upper part of the fan case is provided with an extended region extending in the direction opposite to the offset direction from the discharge port side tip forming the air discharge port,
The combustion device according to claim 1, wherein the first connecting portion connects the extended region to a bottom portion of the burner case . The combustion device according to claim 1,
The bottom portion of the burner case is provided with a plurality of standing portions that stand downward from the peripheral portion of the opening, and auxiliary standing portions that stand downward at positions spaced from the peripheral portion of the opening. ,
The discharge port side tip is interposed in the inner region of the plurality of standing portions, and the second connecting portion connects the discharge port side tip to any of the plurality of standing portions. And
The first connecting portion is a combustion apparatus that connects the extended region to the auxiliary upright portion . The combustion apparatus according to claim 1 or 2 ,
The fan case includes a belt plate portion having a portion surrounding the fan impeller, a motor side plate portion that is joined to one side of the belt plate portion and to which the motor is attached, and the other of the belt plate portion. An air inlet side plate joined to one side of the
Of the first and second connecting portions, at least the first connecting portion is a combustion device configured to connect the motor side plate to the bottom of the burner case . The combustion apparatus according to claim 3 , wherein
The second connecting portion connects the inlet side plate to the bottom of the burner case, and the first and second connecting portions include the motor side plate and the inlet side plate. Combustion device which is also spaced apart in the opposite direction . A combustion apparatus according to claim 4, wherein
As one of the plurality of connecting portions, the motor side plate is located on the opposite side of the first connecting portion with respect to the second connecting portion in the front view, and with respect to the bottom portion of the burner case. A combustion apparatus further comprising a third connecting part for connecting the parts . A combustion apparatus according to any one of claims 1 to 5 ,
The connecting member that constitutes the plurality of connecting portions is a combustion device that is disposed at a position that avoids the air discharge port of the fan and the air passage that communicates therewith .

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