JP2021001706A - Heat source machine - Google Patents

Abstract

To provide a heat source machine that facilitates the attachment work of a front cover.SOLUTION: A housing 2 stores a heat exchanger inside. A front cover 1 is positioned in front of the heat exchanger, and is attached to the housing 2. The housing 2 includes a first inclined portion 2ea having an inclination. The front cover 1 has a guided portion 1bb. The guided portion 1bb is guided by moving along the inclination of the first inclined portion 2ea, and is positioned behind the inclination while the front cover 1 is attached to the housing 2.SELECTED DRAWING: Figure 3

Description

The present invention relates to a heat source machine.

As one of the heat source machines, there is a wall-penetrating combustor installed so as to penetrate the outer wall that separates the indoor and the outdoor. In the wall-penetrating combustor, a casing is inserted into a through hole provided in the outer wall, and a combustion unit such as a heat exchanger is housed in the casing.

Such a wall-penetrating combustor is disclosed in, for example, Japanese Patent No. 4167611 (Patent Document 1), Japanese Patent No. 4703898 (Patent Document 2), and the like. In the wall-penetrating combustors described in these documents, the combustion unit is covered with a front cover from the indoor side. This front cover is screwed to the casing.

Japanese Patent No. 4167611 Japanese Patent No. 4703898

Since the front cover is fixed to the casing with screws, the work of attaching and fixing the front cover is complicated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a heat source machine in which a front cover can be easily attached.

One heat source machine of the present invention includes a heat exchanger, a housing, and a front cover. The housing houses the heat exchanger inside. The front cover is located in front of the heat exchanger and is attached to the housing. The housing includes a first inclined portion having an inclination. The front cover has a guided portion. The guided portion is guided by moving along the inclination of the first inclined portion, and is located behind the inclined portion in a state where the front cover is attached to the housing.

According to one heat source machine of the present invention, the guided portion is guided along the inclination of the first inclined portion. Therefore, when aligning the guided portion with respect to the first inclined portion, the width of alignment in the front-rear direction is widened. Therefore, the alignment of the guided portion with respect to the first inclined portion becomes easy, and the work of attaching the front cover to the housing becomes easy.

Further, when the front cover is attached to the housing, the guided portion is located behind the inclination of the first inclined portion. As a result, when the guided portion moves forward, the inclination of the first inclined portion becomes an obstacle, so that the front cover does not easily come off from the housing forward.

In the above-mentioned one heat source machine, the guided portion is located above the first inclined portion. The inclination of the first inclined portion is an inclination of a downward slope from the front to the rear.

As a result, the guided portion tends to move backward along the inclination of the first inclined portion due to its own weight. Therefore, the work of attaching the front cover to the housing becomes easier.

In the above-mentioned one heat source machine, the housing includes a second inclined portion having an ascending slope from the front to the rear.

As a result, the first inclined portion and the second inclined portion can have a symmetrical shape.
In the above-mentioned one heat source machine, the guided portion has a third inclined portion and a fourth inclined portion. The third inclined portion has a downward slope from the front to the rear and moves along the first inclined portion. The fourth inclined portion has an upward slope from the front to the rear and faces the second inclined portion.

As a result, the guided portion can have a symmetrical shape. Therefore, when the combination of the first inclined portion and the second inclined portion is provided on the left and right respectively, the guided portion having the same shape can be used for each of the combination on the left side and the combination on the right side. Therefore, it is possible to standardize the parts, and it is possible to save the trouble of processing the parts.

If the front cover wobbles with respect to the housing with the front cover attached to the housing, the third inclined portion abuts on the first inclined portion or the fourth inclined portion abuts on the second inclined portion. It is possible to suppress the wobbling of the front cover with respect to the housing.

In the above-mentioned one heat source machine, the housing has a mounting piece having a first inclined portion and a second inclined portion. The mounting piece has a flat portion located between the end of the first inclined portion and the end of the second inclined portion.

As a result, the front cover can be removed from the housing by lifting the front cover to a position where the guided portion gets over the flat portion. Therefore, the lifting height of the front cover when removing the front cover from the housing can be lowered, and the work of removing the front cover from the housing becomes easy.

In the above-mentioned one heat source machine, the housing has a mounting piece having a first inclined portion and a second inclined portion. The end of the first inclined portion and the end of the second inclined portion are connected to each other.

This makes it possible to increase the length of the first inclined portion in the front-rear direction as compared with the configuration in which the flat portion is provided. Therefore, when aligning the guided portion with respect to the first inclined portion, the width of alignment in the front-rear direction is further widened. Therefore, the alignment of the guided portion with respect to the first inclined portion becomes easier, and the work of attaching the front cover to the housing becomes easier.

In the above-mentioned one heat source machine, the front cover is fixed to the housing by a screw member.
As described above, when the front cover is attached to the housing, the guided portion is located behind the inclination in the first inclined portion, and the front cover is difficult to come off from the housing forward. Therefore, the number of screw members for fixing the front cover to the housing can be reduced as compared with the case where the front cover is attached to the housing only with the screw members. As a result, the number of screw members to be attached is reduced, and the work of screwing the screw members can be reduced, so that the work of attaching the front cover to the housing becomes easy.

In the above-mentioned one heat source machine, the front cover has a cover main body portion and a receiving portion attached to the cover main body portion. The receiving portion has a guided portion and forms a gap between the receiving portion and the cover main body portion into which the first inclined portion can be inserted.

As a result, a configuration in which the first inclined portion is inserted into the gap between the guided portion and the cover main body portion can be easily obtained.

In the above-mentioned one heat source machine, the receiving portion has an end portion forming the entrance of the gap, and is bent toward the end portion and thus away from the cover main body portion.

This makes it easier to insert the first inclined portion into the gap between the receiving portion and the cover main body portion, and further facilitates the work of attaching the front cover to the housing.

In the above-mentioned one heat source machine, the receiving portion includes a mounting portion and a guided portion. The mounting portion is mounted on the cover main body portion. The guided portion is connected to the mounting portion and forms a gap between the guided portion and the cover main body portion. The guided portion has a notch extending from the end portion of the guided portion to the mounting portion.

By forming this notch, it is possible to form a guided portion bent from the mounting portion by bending one plate material instead of deep drawing. Therefore, the guided portion can be easily processed.

In the above-mentioned one heat source machine, the receiving portion includes a mounting portion and a guided portion. The mounting portion is mounted on the cover main body portion. The guided portion is connected to the mounting portion and forms a gap between the guided portion and the cover main body portion. The guided portion does not have a notch extending from the end of the guided portion to the mounting portion.

Since the notch is not formed in this way, the strength of the guided portion can be improved.
The other heat source machine of the present invention includes a heat exchanger, a housing, and a front cover. The housing houses the heat exchanger inside. The front cover is located in front of the heat exchanger and is attached to the housing. The housing has a mounting piece. The front cover includes an inclined portion. The tilted portion is guided by moving along the mounting piece and has a tilt located behind the mounting piece with the front cover mounted on the housing.

According to the other heat source machine of the present invention, the inclined portion is guided along the mounting piece. Therefore, when aligning the inclined portion with respect to the mounting piece, the width of alignment in the front-rear direction is widened. Therefore, the alignment of the inclined portion with respect to the mounting piece becomes easy, and the work of mounting the front cover on the housing becomes easy.

Further, when the front cover is attached to the housing, the inclined portion has an inclination located behind the attachment piece. As a result, the mounting piece becomes an obstacle when the inclination of the inclined portion moves forward, so that the front cover does not easily come off to the front of the housing.

As described above, according to the present invention, it is possible to realize a heat source machine in which the front cover can be easily attached.

It is sectional drawing which shows the structure of the wall-penetrating type combustor as an example of the heat source machine in one Embodiment of this invention. It is an exploded perspective view which shows the structure of the housing and the front cover in the wall-penetrating combustor of FIG. It is an enlarged perspective view which shows the periphery of the guided part and the mounting piece in the wall-penetrating combustor of FIG. 1 in an enlarged manner. It is an enlarged view which shows the guided part and the mounting piece of FIG. 3 enlarged. It is an enlarged view which shows the state which the attachment piece was inserted into the guided part of FIG. It is sectional drawing along the VI-VI line of FIG. 5 which shows the structure of the guided part and the attachment piece. It is a figure (A)-(C) which shows the assembly operation of the heat source machine in one Embodiment of this invention. It is an enlarged view for demonstrating the structure of the 1st inclined part and the 2nd inclined cloth part in the attachment piece of FIG. It is an enlarged perspective view which shows the structure of the modification of the guided part. It is a figure (A)-(C) which shows the schematic structure and assembly operation of the 1st modification of the heat source machine in one Embodiment of this invention. It is a figure (A)-(C) which shows the schematic structure and assembly operation of the 2nd modification of the heat source machine in one Embodiment of this invention. It is a figure (A)-(C) which shows the schematic structure and assembly operation of the 3rd modification of the heat source machine in one Embodiment of this invention. It is an enlarged view for demonstrating that the width of the alignment in the front-rear direction increases when the guided portion of FIG. 3 is aligned with respect to a mounting piece.

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 will not be repeated. Further, in the drawings, the configuration may be omitted or simplified for convenience of explanation. Further, at least a part of the embodiment and the modified example may be arbitrarily combined with each other.

<Structure of heat source machine>
First, the configuration of a wall-penetrating combustor will be described with reference to FIG. 1 as an example of the heat source machine according to the embodiment of the present invention.

However, the heat source machine is not limited to the combustor, and may be, for example, a hot water device, a hot water supply device, a heating device, a bath hot water supply device with hot water heating, or the like. Further, the heat source machine may be a method of burning fuel gas or a method of burning petroleum. Further, the heat source machine may be a hot water storage type or an instantaneous type. Further, the heat source machine is not limited to the extruded combustion type hot water supply device, and may be an exhaust suction combustion type hot water supply device.

As shown in FIG. 1, the wall-penetrating combustor 10 of the present embodiment is inserted into a through-hole 30a provided in an outer wall 30 that separates indoors and outdoors. The wall-penetrating combustor 10 mainly includes a front cover 1, a housing 2, a blower 3, a combustor 4, a heat exchanger 5, and a pipe 6.

The housing 2 is arranged so as to penetrate the inside of the through hole 30a of the outer wall 30. The front end 2F of the housing 2 projects indoors from the outer wall 30. The rear end 2R of the housing 2 projects outdoors from the outer wall 30.

Each of the blower 3, the combustion device 4, and the heat exchanger 5 is housed inside the housing 2. The blower 3, the combustion device 4, and the heat exchanger 5 are arranged in this order from the indoor side to the outdoor side.

The blower 3 is for taking in air from the outside of the housing 2 and supplying it to the combustion device 4. A combustion device 4 is connected to the outdoor side of the blower 3.

The combustion device 4 is for generating a combustion gas as a heating gas by burning a mixed gas of a fuel gas and air. A heat exchanger 5 is connected to the outdoor side of the combustion device 4.

The heat exchanger 5 is for exchanging heat between the combustion gas generated in the combustion device 4 and the water inside the heat exchanger 5. The heat exchanger 5 has, for example, a primary heat exchanger and a secondary heat exchanger. The primary heat exchanger is a sensible heat recovery type heat exchanger for recovering the sensible heat of the combustion gas generated in the combustion device 4. The secondary heat exchanger is a latent heat recovery type heat exchanger for recovering the latent heat of the combustion gas generated in the combustion device 4.

In order to discharge the combustion gas after heat exchange with the heat exchanger 5 to the outside of the housing 2, a plurality of exhaust holes (not shown) are provided in the portion protruding outdoors from the outer wall 30 of the housing 2. It is provided.

The pipe 6 is connected to the heat exchanger 5. The pipe 6 is a water supply pipe or a hot water outlet pipe. Further, a gas pipe (not shown) for supplying fuel gas to the combustion device 4 is connected to the combustion device 4. The pipe 6, the gas pipe, and the like extend downward after extending to the outside of the housing 2.

A front cover 1 is attached to the front end 2F of the housing 2. As a result, the front cover 1 is located in front (indoor side) of the blower 3, the combustion device 4, and the heat exchanger 5. The front cover 1 covers the front end 2F of the housing 2 and the pipe 6 extending to the lower side of the housing 2. As a result, the inside of the housing 2, the piping 6, and the like cannot be visually recognized from indoors.

In the wall-penetrating combustor 10, the water supplied from the water supply pipe to the secondary heat exchanger is preheated by recovering the latent heat of the combustion gas generated in the combustion device 4. The hot water preheated by the secondary heat exchanger is supplied to the primary heat exchanger. The hot water supplied to the primary heat exchanger is heated by recovering the sensible heat of the combustion gas generated in the combustion device 4. The hot water heated by the primary heat exchanger is supplied to the outside of the wall-penetrating combustor 10 through the hot water outlet pipe.

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

<Composition of front cover and housing>
Next, the configurations of the front cover 1 and the housing 2 of the wall-penetrating combustor 10 in the present embodiment will be described with reference to FIGS. 2 and 3.

As shown in FIG. 2, the housing 2 has a flange portion 2a, an upper mounting portion 2b, a main body portion 2c, a lower mounting portion 2d, and a pair of left and right mounting pieces 2e.

The main body 2c has a tubular shape having, for example, a quadrangular prism shape. The rear end 2R of the tubular main body 2c is closed by a rear plate (not shown). However, exhaust holes (not shown) are provided in the vicinity of the rear end 2R of the main body 2c and in each of the rear plates. Through this exhaust hole, the combustion gas after heat exchange with the heat exchanger 5 is discharged to the outside of the housing 2.

The front end 2F of the tubular main body 2c is open. The internal space 2ba of the main body 2c is connected to the external space of the housing 2 through the opening on the front end 2F. This opening has, for example, a quadrangular shape.

The flange portion 2a is connected to the front end 2F of the main body portion 2c. The flange portion 2a projects at the front end 2F in all directions, up, down, left, and right. The flange portion 2a surrounds the front end 2F of the main body portion 2c.

The upper mounting portion 2b is a portion for mounting the upper portion of the front cover 1 to the housing 2. The upper mounting portion 2b is connected to the upper end of the flange portion 2a. The upper mounting portion 2b is composed of a member separate from the flange portion 2a and is mounted on the flange portion 2a. However, the upper mounting portion 2b may be integrally configured with the flange portion 2a. That is, the upper mounting portion 2b may be configured by bending from the same plate as the flange portion 2a.

The upper mounting portion 2b has a portion to be mounted on the flange portion 2a, a portion extending forward from the upper end of the portion, and a portion extending downward from the front end of the portion extending forward thereof. A plurality of screw holes 2bh are provided in a portion extending forward of the upper mounting portion 2b. The plurality of screw holes 2b include a screw hole 2b provided at the right end of the upper mounting portion 2b and a screw hole 2b provided at the left end of the upper mounting portion 2b. Further, the upper mounting portion 2b is provided with a through hole 2bp for inserting a power cord (not shown).

The lower mounting portion 2d is a portion for mounting the lower portion of the front cover 1 to the housing 2. The lower mounting portion 2d is formed separately from the flange portion 2a, for example. However, the lower mounting portion 2d may be integrally configured with the flange portion 2a. That is, the lower mounting portion 2d may be configured by bending from the same plate as the flange portion 2a.

The lower mounting portion 2d has a supporting portion 2da and a fixing portion 2db. A fixed portion 2db is connected to the rear end of the supporting portion 2da. The support portion 2da and the fixing portion 2db are connected to each other so as to form a substantially right angle.

The fixing portion 2db is attached to the front surface of the flange portion 2a by a fixing member 11 such as a screw. The support portion 2da extends forward from the joint portion with the fixing portion 2db. The support portion 2da is provided with a through hole through which a pipe and a gas pipe are passed. Seal members 2g are attached to the front end and the side end of the support portion 2da. The seal member 2g is for sealing between the front cover 1 and the housing 2.

Each of the pair of left and right mounting pieces 2e is a part for mounting the front cover 1. Each of the pair of left and right mounting pieces 2e is mounted on the support portion 2da of the lower mounting portion 2d. The mounting piece 2e on the right side is connected to the right end of the support portion 2da. The left mounting piece 2e is connected to the left end of the support portion 2da.

Each of the pair of left and right mounting pieces 2e is located in front of the flange portion 2a and the fixing portion 2db. Each of the pair of left and right mounting pieces 2e extends upward from the connecting portion with the supporting portion 2da. Each of the pair of left and right mounting pieces 2e has a certain thickness in the left-right direction and extends long in the front-rear direction.

Each of the pair of left and right mounting pieces 2e is integrally formed with the support portion 2da. That is, each of the pair of left and right mounting pieces 2e is formed by bending from the same plate as the support portion 2da. However, each of the pair of left and right mounting pieces 2e may be composed of the support portion 2da and a separate member and may be mounted on the support portion 2da.

The front cover 1 has a cover main body portion 1a and a pair of left and right receiving portions 1b. The cover main body 1a has a front plate 1af, a pair of left and right side plates 1as, a pair of left and right upper end portions 1at, a bottom plate 1ab, and an upper end mounting portion 1aa. The front plate 1af, the left and right pair of side plates 1as, and the left and right pair of upper end portions 1at are made of one piece.

The front plate 1af is a portion that covers the front of the housing 2. Each of the pair of left and right side plates 1as is connected to the right end and the left end of the front plate 1af. The right side plate 1as extends rearward from the right end of the front plate 1af. The left side plate 1as extends rearward from the left end of the front plate 1af.

Each of the left and right pairs of upper end portions 1at is connected to the upper ends of the left and right pair of side plates 1as. The upper end portion 1at on the right side extends from the upper end of the side plate 1as on the right side to the left side. The left upper end portion 1at extends from the upper end of the left side plate 1as to the right side.

Through holes 1ah are provided in each of the pair of left and right upper end portions 1at. The through hole 1ah is for passing a screw 12 (screw member). The screw 12 is screwed into the screw hole 2bh of the housing 2 after passing through the through hole 1ah of the front cover 1.

The upper end mounting portion 1aa is attached to a pair of left and right upper end portions 1at and the like. A packing (not shown) is attached to the lower surface of the upper end mounting portion 1aa. With the front cover 1 attached to the housing 2, the upper end attachment portion 1aa is connected to the upper attachment portion 2b via packing. As a result, water such as a shower is prevented from entering between the upper end mounting portion 1aa and the upper mounting portion 2b.

The bottom plate 1ab is located at the bottom of the front cover 1. The bottom plate 1ab is connected to each of the front plate 1af and the pair of left and right side plates 1as. The bottom plate 1ab is formed separately from the front plate 1af and the pair of left and right side plates 1as. However, the bottom plate 1ab may be integrally formed with the front plate 1af and a pair of left and right side plates 1as.

A pair of left and right receiving portions 1b are attached to the cover main body portion 1a. Specifically, each of the pair of left and right receiving portions 1b is attached to the pair of left and right side plates 1as. Each of the pair of left and right receiving portions 1b is attached to the front cover 1 so as to be located in the space covered by the front cover 1.

The right receiving portion 1b is attached to the left side surface of the right side plate 1as. The left receiving portion 1b is attached to the right side surface of the left side plate 1as.

When the front cover 1 is attached to the housing 2, each of the support portion 2da and the pair of left and right attachment pieces 2e are located in the space covered by the front cover 1. When the front cover 1 is attached to the housing 2, the right mounting piece 2e is inserted into the right receiving portion 1b, and the left mounting piece 2e is inserted into the left receiving portion 1b.

When the front cover 1 is attached to the housing 2, the upper end portion 1at of the front cover 1 is located above the upper mounting portion 2b in the housing 2. In this state, the screw 12 is screwed into the screw hole 2bh of the upper mounting portion 2b through the through hole 1ah of the upper end portion 1at.

The portion of the cover body portion 1a located below each of the pair of left and right receiving portions 1b is the piping cover portion TC. As shown in FIG. 1, the pipe cover portion TC covers the front and left and right sides of the pipe 6 extending outward from the internal space 2ba of the housing 2 and extending downward.

<Structure of mounting piece and receiving part>
Next, the configurations of the mounting piece 2e and the receiving portion 1b of the wall-penetrating combustor 10 in the present embodiment will be described with reference to FIGS. 3 and 4.

As shown in FIG. 3, when the front cover 1 is attached to the housing 2, the front cover 1 is first moved from the front of the housing 2 to the rear so as to approach the front end 2F of the housing 2. Due to this movement, the receiving portion 1b is positioned directly above the mounting piece 2e. After that, the front cover 1 is moved downward with respect to the housing 2. By this movement, the receiving portion 1b is inserted into the gap between the mounting piece 2e and the side plate 1as.

As shown in FIG. 4, the mounting piece 2e has, for example, a trapezoidal shape when viewed from the left and right directions. The mounting piece 2e of the housing 2 has a first inclined portion 2ea, a second inclined portion 2eb, and a flat portion 2ec. The first inclined portion 2ea has an inclined downward slope from the front to the rear.

The second inclined portion 2eb is located in front of the first inclined portion 2ea. The second inclined portion 2eb has an upward slope from the front to the rear. Each of the first inclined portion 2ea and the second inclined portion 2eb is inclined so that the distance LA between the first inclined portion 2ea and the second inclined portion 2eb in the front-rear direction increases from the upper side to the lower side.

The flat portion 2ec connects the upper end of the first inclined portion 2ea and the upper end of the second inclined portion 2eb. The front end and the rear end of the flat portion 2 ec have the same height, and the front end and the rear end of the flat portion 2 ec are flat. The mounting piece 2e is connected to the support portion 2da at the lower end of the first inclined portion 2ea and the lower end of the second inclined portion 2eb.

The mounting piece 2e has a shape that is line-symmetrical with respect to the virtual line C in a side view. The virtual line C is a line orthogonal to the flat portion 2 ec and passing through the center of the flat portion 2 ec. The inclination angle of the first inclined portion 2ea with respect to the flat portion 2ec and the inclination angle of the second inclined portion 2eb with respect to the flat portion 2ec are the same as each other. The inclination angle θ1 of the first inclined portion 2ea and the inclination angle θ2 of the second inclined portion 2eb are each 45 degrees or more. As a result, the frictional resistance when the guided portion 1bb is guided by the first inclined portion 2ea can be suppressed.

The receiving portion 1b of the front cover 1 has a mounting portion 1ba and a guided portion 1bb. The mounting portion 1ba and the guided portion 1bb are composed of one plate, and form an integral body. The mounting portion 1ba is a flat plate-shaped portion, and is a portion to be mounted on the cover main body portion 1a of the front cover 1.

The guided portion 1bb is connected to the mounting portion 1ba. The guided portion 1bb forms a gap between the guided portion 1bb and the cover main body portion 1a. Specifically, the guided portion 1bb is bent with respect to the mounting portion 1ba so as to form a gap between the cover main body portion 1a and the side plate 1as.

The guided portion 1bb is a portion that is guided by moving along the first inclined portion 2ea of the mounting piece 2e when the front cover 1 is attached to the housing 2. The guided portion 1bb has a third inclined portion 1bc and a fourth inclined portion 1bb.

The third inclined portion 1bc has an inclined downward slope from the front to the rear. The third inclined portion 1bc is a portion that moves along the first inclined portion 2ea. The fourth inclined portion 1bd has an upward slope from the front to the rear. The fourth inclined portion 1bd is a portion facing the second inclined portion 2eb.

Each of the third inclined portion 1bc and the fourth inclined portion 1bd is inclined so that the distance LB in the front-rear direction between the third inclined portion 1bc and the fourth inclined portion 1bd increases from the upper side to the lower side.

The guided portion 1bb has a shape that is line-symmetrical with respect to the virtual line C in a side view. The inclination angle of the third inclined portion 1bc with respect to the front-rear direction and the inclination angle of the fourth inclined portion 1bd with respect to the front-rear direction are the same as each other.

The guided portion 1bb has a notch 1be. The notch 1be extends from the tip (lower end) of the guided portion 1bb to the mounting portion 1ba. The guided portion 1bb is divided into two by the notch 1be. The rear portion of the guided portion 1bb divided into two has a third inclined portion 1bc. The front portion of the guided portion 1bb divided into two has a fourth inclined portion 1bb. The rear portion and the front portion of the guided portion 1bb divided into two have a shape that is line-symmetrical with respect to the virtual line C.

As shown in FIGS. 5 and 6, in the state where the front cover 1 is attached to the housing 2, the attachment piece 2e is inserted into the gap between the guided portion 1bb and the side plate 1as. That is, in a state where the front cover 1 is attached to the housing 2, each of the first inclined portion 2ea and the second inclined portion 2eb is inserted into the gap between the receiving portion 1b and the cover main body portion 1a.

As shown in FIG. 5, when the front cover 1 is attached to the housing 2, a part of the guided portion 1bb is located behind the first inclined portion 2ea. Specifically, in a state where the front cover 1 is attached to the housing 2, the third inclined portion 1bc of the guided portion 1bb is located behind the first inclined portion 2ea. Further, in this state, the fourth inclined portion 1bd of the guided portion 1bb is located in front of the second inclined portion 2eb.

When the front cover 1 is attached to the housing 2, a part of the guided portion 1bb is located above the first inclined portion 2ea. Specifically, in a state where the front cover 1 is attached to the housing 2, the third inclined portion 1bc of the guided portion 1bb is located above the first inclined portion 2ea. Further, in this state, the fourth inclined portion 1bd of the guided portion 1bb is located above the second inclined portion 2eb.

As shown in FIG. 6, the guided portion 1bb of the receiving portion 1b has an end portion 1bt. The end portion 1bt constitutes the entrance of the gap between the receiving portion 1b and the cover main body portion 1a. Here, the entrance of the gap means an entrance for inserting the mounting piece 2e into the gap between the receiving portion 1b and the cover main body portion 1a. The guided portion 1bb of the receiving portion 1b is bent so as to be separated from the side plate 1as of the cover main body portion 1a toward the end portion 1bt (toward the entrance of the gap). As a result, the distance LC in the left-right direction between the guided portion 1bb of the receiving portion 1b and the side plate 1as of the cover main body portion 1a increases toward the end portion 1bt.

<How to attach the front cover to the housing>
Next, a method of attaching the front cover 1 to the housing 2 in the present embodiment will be described with reference to FIGS. 7A to 7C.

As shown in FIG. 7A, when the front cover 1 is attached to the housing 2, the arrow AR1 in the figure indicates that the front cover 1 first approaches the front end of the housing 2 from the front of the housing 2. Moved to the rear shown.

As shown in FIG. 7B, the receiving portion 1b is located directly above the mounting piece 2e due to the rearward movement of the front cover 1. After that, the front cover 1 is moved downward with respect to the housing 2 as indicated by the arrow AR2 in the figure.

Due to the downward movement of the front cover 1, the third inclined portion 1bc of the receiving portion 1b comes into contact with the first inclined portion 2ea of the mounting piece 2e. After that, the third inclined portion 1bc moves rearward along the first inclined portion 2ea, so that the front cover 1 is rearward with respect to the housing 2 as indicated by the arrow AR1 in the figure and downward as indicated by AR2. You will be guided to.

As shown in FIG. 7C, the front cover 1 is attached to the housing 2 by the rearward and downward movement of the front cover 1. In this state, as shown in FIG. 5, the mounting piece 2e is inserted into the gap between the receiving portion 1b and the side plate 1as of the cover main body portion 1a.

After that, as shown in FIGS. 1 and 2, the screw 12 is screwed into the screw hole 2bh of the housing 2 after passing through the through hole 1ah of the front cover 1. As a result, the front cover 1 is fixed to the housing 2.

<Modification example>
Next, a modification of the heat source machine according to the present embodiment will be described.

In the above embodiment, the case where the mounting piece 2e has a trapezoidal shape in the side view has been described, but as shown by the solid line and the broken line in FIG. 8, the mounting piece 2e has a triangular shape in the side view. You may be doing it. In this case, the upper end of the first inclined portion 2ea and the upper end of the second inclined portion 2eb are connected to each other.

Further, in the above, the case where the guided portion 1bb has the notch 1be as shown in FIG. 3 has been described, but as shown in FIG. 9, the guided portion 1bb extends from the lower end of the guided portion 1bb to the mounting portion 1ba. It does not have to have an extending notch 1be. In this case, the guided portion 1bb is integrally formed without being divided into a portion having the third inclined portion 1bc and a portion having the fourth inclined portion 1bb.

Further, in the above, the configuration in which the mounting piece 2e of the housing 2 has the first inclined portion 2ea and the second inclined portion 2eb, and the guided portion 1bb has the third inclined portion 1bc and the fourth inclined portion 1bd has been described. However, the present invention is not limited to this configuration. In the present invention, at least the housing 2 has the first inclined portion 2ea, the front cover 1 has the guided portion 1bb, and the guided portion 1bb moves along the inclination of the first inclined portion 2ea. The configuration may be such that the front cover 1 is guided and is located behind the inclination in a state where the front cover 1 is attached to the housing 2. An example of the configuration will be described below as a first modified example and a second modified example.

As in the first modification shown in FIG. 10A, the housing 2 may have only the first inclined portion 2ea and may not have the second inclined portion. Further, the receiving portion 1b (guided portion 1bb) does not have to have both the third inclined portion and the fourth inclined portion.

As shown in FIGS. 10B and 10C, even in the configuration of this first modification, the receiving portion 1b (guided portion 1bb) moves along the inclination of the first inclined portion 2ea of the housing 2. The front cover 1 is located behind the inclination in a state where the front cover 1 is attached to the housing 2.

Further, as in the second modification shown in FIG. 11A, the housing 2 may have only the first inclined portion 2ea and may not have the second inclined portion. Further, the receiving portion 1b (guided portion 1bb) may have only the third inclined portion 1bc and may not have the fourth inclined portion.

As shown in FIGS. 11B and 11C, even in the configuration of this second modification, the third inclined portion 1bc of the receiving portion 1b (guided portion 1bb) is the first inclined portion 2ea of the housing 2. It is guided by moving along the inclination of, and is located behind the inclination in a state where the front cover 1 is attached to the housing 2.

Further, in each of the above-described embodiment, the first modification, and the second modification, the configuration in which the mounting piece 2e of the housing 2 has an inclination has been described, but it is as in the third modification shown in FIG. 12 (A). In addition, the mounting piece 2e may not have an inclination, and the receiving portion 1b (guided portion 1bb) of the front cover 1 may have an inclined portion 1bc.

As shown in FIGS. 12B and 12C, in the configuration of this third modification, the inclined portion 1bc of the receiving portion 1b (guided portion 1bb) moves along the mounting piece 2e of the housing 2. The front cover 1 is located behind the mounting piece 2e in a state where the front cover 1 is mounted on the housing 2.

Further, in each of the above-described embodiment and the first to third modifications, the case where the front cover 1 is attached to the housing 2 by moving the front cover 1 backward toward the housing 2 and then moving downward has been described. However, the present invention is not limited to this. In the present invention, the front cover 1 is mounted after the configurations of both the receiving portion 1b (guided portion 1bb) and the mounting piece 2e in each of the above-described embodiment and the first to third modifications are reversed. It may be attached to the housing 2 by moving it backward toward the body 2 and then moving it upward.

<Effect of this embodiment>
Next, the effect of this embodiment will be described.

According to the present embodiment, as shown in FIGS. 7A to 7C, the guided portion 1bb is guided along the inclination of the first inclined portion 2ea. Therefore, when the guided portion 1bb is aligned with respect to the first inclined portion 2ea, the width of the alignment in the front-rear direction is widened. That is, as shown in FIG. 13, the portion of the guided portion 1bb (for example, the third inclined portion 1bc) that contacts the first inclined portion 2ea is located within the range of the length L1 in the front-rear direction of the first inclined portion 2ea. do it. Therefore, the position of the guided portion 1bb with respect to the first inclined portion 2ea becomes easy, and the work of attaching the front cover 1 to the housing 2 becomes easy.

Further, as shown in FIGS. 5 and 7 (C), the guided portion 1bb is located behind the inclination of the first inclined portion 2ea in the state where the front cover 1 is attached to the housing 2. For example, the third inclined portion 1bc of the guided portion 1bb is located behind the inclination in the first inclined portion 2ea. As a result, when the guided portion 1bb moves forward, the inclination of the first inclined portion 2ea becomes an obstacle, so that the front cover 1 is less likely to come off the housing 2 forward.

Further, in the present embodiment, as shown in FIGS. 5 and 7 (C), when the front cover 1 is attached to the housing 2, the guided portion 1bb is located on the first inclined portion 2ea. The inclination of the first inclined portion 2ea is an inclination of a downward slope from the front to the rear. As a result, the guided portion 1bb tends to move backward along the inclination of the first inclined portion 2ea due to its own weight. Therefore, the work of attaching the front cover 1 to the housing 2 becomes easier.

Further, in the present embodiment, as shown in FIG. 4, the housing 2 includes a second inclined portion 2eb having an upward slope from the front to the rear. As a result, the first inclined portion 2ea and the second inclined portion 2eb can have a symmetrical shape, which facilitates the design.

Further, in the present embodiment, as shown in FIGS. 7A to 7C, the guided portion 1bb has a third inclined portion 1bc and a fourth inclined portion 1bd. The third inclined portion 1bc has a downward slope from the front to the rear, and moves along the first inclined portion 2ea. The fourth inclined portion 1bd has an upward slope from the front to the rear and faces the second inclined portion 2eb. As a result, the guided portion 1bb can have a symmetrical shape. Therefore, when the mounting pieces 2e having a combination of the first inclined portion 2ea and the second inclined portion 2eb are provided on the left and right sides as shown in FIG. 2, the left mounting piece 2e and the right mounting piece 2e are respectively provided. A guided portion 1bb having the same shape can be used. Therefore, it is possible to standardize the parts, and it is possible to save the trouble of processing the parts.

Further, as shown in FIG. 7C, when the front cover 1 wobbles with respect to the housing 2 in the direction of the arrow AR3 with the front cover 1 attached to the housing 2, the third inclined portion 1bc becomes the first. The wobbling of the front cover 1 can be suppressed by abutting on the inclined portion 2ea or by abutting the fourth inclined portion 1bd on the second inclined portion 2eb.

Further, in the present embodiment, as shown in FIG. 8, the housing 2 has a mounting piece 2e having a first inclined portion 2ea and a second inclined portion 2eb. The mounting piece 2e has a flat portion 2ec located between the end of the first inclined portion 2ea and the end of the second inclined portion 2eb. As a result, the front cover 1 can be removed from the housing 2 by lifting the front cover 1 to a position at a height H1 where the guided portion 1bb gets over the flat portion 2ec. Therefore, the lifting height of the front cover 1 when the front cover 1 is removed from the housing 2 can be lowered, and the work of removing the front cover 1 from the housing 2 becomes easy.

Further, in the present embodiment, as shown in FIG. 8, the end portion of the first inclined portion 2ea and the end portion of the second inclined portion 2eb may be connected to each other. This makes it possible to make the length L2 of the first inclined portion 2ea in the front-rear direction larger than the length L1 in the front-rear direction when the flat portion 2ec is provided. Therefore, when the guided portion 1bb is aligned with respect to the first inclined portion 2ea, the width of the alignment in the front-rear direction is further widened. Therefore, the alignment of the guided portion 1bb with respect to the first inclined portion 2ea becomes easier, and the work of attaching the front cover 1 to the housing 2 becomes easier.

Further, in the present embodiment, as shown in FIGS. 5 and 7 (C), when the front cover 1 is attached to the housing 2, the guided portion 1bb is behind the inclination of the first inclined portion 2ea. It is located so that the front cover 1 does not easily come off the housing 2 forward. Therefore, the number of screws 12 (FIGS. 1 and 2) for fixing the front cover 1 to the housing 2 should be smaller than the number of screws 12 when the front cover 1 is attached to the housing 2. Can be done. As a result, the number of screws 12 to be attached is reduced, so that the work of screwing the screws 12 can be reduced, and the work of attaching the front cover 1 to the housing 2 becomes easy.

Further, in the present embodiment, as shown in FIG. 6, the front cover 1 has a cover main body portion 1a and a receiving portion 1b attached to the cover main body portion 1a. The receiving portion 1b has a guided portion 1bb and forms a gap between the receiving portion 1b and the cover main body portion 1a into which the first inclined portion 2ea can be inserted. As a result, a configuration in which the first inclined portion 2ea (FIG. 5) is inserted into the gap between the guided portion 1bb and the cover main body portion 1a can be easily obtained.

Further, in the present embodiment, as shown in FIG. 6, the receiving portion 1b has an end portion 1bt constituting the entrance of the gap, and is bent toward the end portion 1bt and therefore away from the cover main body portion 1a. There is. As a result, the first inclined portion 2ea can be easily inserted into the gap between the receiving portion 1b and the cover main body portion 1a, and the work of attaching the front cover 1 to the housing 2 becomes easier.

Further, in the present embodiment, as shown in FIG. 4, the guided portion 1bb has a notch 1be extending from the end portion 1bt of the guided portion 1bb to the mounting portion 1ba. Since the notch 1be is formed, one plate material can be bent without deep drawing to form a guided portion 1bb bent from the mounting portion 1ba. Therefore, the guided portion 1bb can be easily processed.

Further, in the present embodiment, as shown in FIG. 9, the guided portion 1bb does not have a notch extending from the end portion 1bt of the guided portion 1bb to the mounting portion 1ba. Since the notch is not formed in this way, the strength of the guided portion 1bb can be improved.

Further, in the third modification shown in FIG. 12, the front cover 1 includes the inclined portion 1bc. The inclined portion 1bc has an inclination that is guided by moving along the mounting piece 2e and is located behind the mounting piece 2e in a state where the front cover 1 is mounted on the housing 2. As described above, in the third modification, the inclined portion 1bc is guided along the mounting piece 2e. Therefore, when the inclined portion 1bc is aligned with the mounting piece 2e, the width of the alignment in the front-rear direction is widened. Therefore, the alignment of the inclined portion 1bc with respect to the mounting piece 2e becomes easy, and the mounting work of the front cover 1 to the housing 2 becomes easy.

Further, when the front cover 1 is attached to the housing 2, the inclined portion 1bc has an inclination located behind the attachment piece 2e. As a result, the mounting piece 2e becomes an obstacle when the inclination of the inclined portion 1bc moves forward, so that the front cover 1 is less likely to come off in front of the housing 2.

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 Front cover, 1a cover body, 1aa upper end mounting part, 1ab bottom plate, 1af front plate, 1ah, 2bp, 30a through hole, 1as side plate, 1at upper end part, 1b receiving part, 1ba, 2d mounting part, 1bb guided part , 1bc 3rd inclined part, 1bd 4th inclined part, 1be notch, 1bt end part, 2 housing, 2F front end, 2R rear end, 2a flange part, 2b upper mounting part, 2b screw hole, 2c main body part, 2d Lower mounting part, 2da support part, 2db fixing part, 2e mounting piece, 2ea first inclined part, 2eb second inclined part, 2ec flat part, 2g sealing member, 3 blower, 4 combustion device, 5 heat exchanger, 6 piping 10, 10 wall-penetrating combustor, 11 fixing member, 12 screws, 30 outer wall.

Claims (12)

With a heat exchanger
A housing that houses the heat exchanger and
A front cover located in front of the heat exchanger and attached to the housing.
The housing includes a first inclined portion having an inclined portion.
The front cover has a guided portion and has a guided portion.
A heat source machine in which the guided portion is guided by moving along the inclination of the first inclined portion, and is located behind the inclined portion with the front cover attached to the housing. The guided portion is located on the first inclined portion and is located on the first inclined portion.
The heat source machine according to claim 1, wherein the inclination of the first inclined portion is an inclination of a downward slope from the front to the rear. The heat source machine according to claim 1 or 2, wherein the housing includes a second inclined portion having an upward slope from the front to the rear. The guided portion is
A third inclined portion having a downward slope from the front to the rear and moving along the first inclined portion,
The heat source machine according to claim 3, further comprising an uphill slope from the front to the rear and a fourth slope portion facing the second slope portion. The housing has a mounting piece having the first inclined portion and the second inclined portion.
The heat source machine according to claim 3 or 4, wherein the mounting piece has a flat portion located between an end portion of the first inclined portion and an end portion of the second inclined portion. The housing has a mounting piece having the first inclined portion and the second inclined portion.
The heat source machine according to claim 3 or 4, wherein the end portion of the first inclined portion and the end portion of the second inclined portion are connected to each other. The heat source machine according to any one of claims 1 to 6, wherein the front cover is fixed to the housing by a screw member. The front cover
Cover body and
It has a receiving portion attached to the cover main body portion and
The one according to any one of claims 1 to 7, wherein the receiving portion has the guided portion and constitutes a gap between the receiving portion and the cover main body portion into which the first inclined portion can be inserted. Heat source machine. The heat source machine according to claim 8, wherein the receiving portion has an end portion forming an entrance of the gap and is bent so as to be separated from the cover main body portion toward the end portion. The receiving part is
The mounting part attached to the cover body and the mounting part
Including the guided portion that is connected to the mounting portion and that forms the gap between the cover main body portion and the cover main body portion.
The heat source machine according to claim 8 or 9, wherein the guided portion has a notch extending from an end portion of the guided portion to the mounting portion. The receiving part is
The mounting part attached to the cover body and the mounting part
Including the guided portion that is connected to the mounting portion and that forms the gap between the cover main body portion and the cover main body portion.
The heat source machine according to claim 8 or 9, wherein the guided portion does not have a notch extending from an end portion of the guided portion to the mounting portion. With a heat exchanger
A housing that houses the heat exchanger and
A front cover located in front of the heat exchanger and attached to the housing.
The housing has a mounting piece and
The front cover includes an inclined portion and includes an inclined portion.
A heat source machine in which the inclined portion is guided by moving along the mounting piece, and has an inclination located behind the mounting piece when the front cover is mounted on the housing.

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