JP6780966B2 - Exhaust stack and combustion equipment - Google Patents

Description

The present invention relates to an exhaust stack for exhausting combustion exhaust to the outside, and a combustion device provided with the exhaust stack.

Patent Document 1 discloses an exhaust top used for a combustion appliance that forcibly discharges combustion exhaust to the outside. The exhaust top described in Patent Document 1 is provided with a glass attached to the front side of the exhaust stack. On the front surface of the gallery, a plurality of angle plates are attached substantially in parallel at predetermined intervals. Therefore, the gap shape (opening shape) between adjacent angle plates is substantially rectangular. The garari is called, for example, a bird net, and is a net unit that prevents birds, rain, wind, etc. from entering the inside of the exhaust stack through the garari.

For example, the combustion appliance disclosed in Patent Document 1 may be installed inside a door in an apartment house or the like. In this case, at least a portion (eg, tip) of the exhaust top is located outside the door. As a result, the combustion exhaust is discharged to the outside of the door through the garage of the exhaust top. Further, at least a part of the exhaust top arranged on the outside of the door is visible from the outside of the door.

In addition, Non-Patent Document 1 discloses research results on optical illusions researched in the Grant-in-Aid for Scientific Research grants by the Ministry of Education, Culture, Sports, Science and Technology and the Japan Society for the Promotion of Science. Non-Patent Document 1 describes that when one point is stared at and a circle is viewed for several seconds in peripheral vision, it eventually looks like a polygon such as a hexagon instead of a circle. In addition, it is described that the afterimage that appears when the circle disappears after that is a polygon, which is significantly different from the circle that should have stimulated the retina. On the contrary, the afterimage that can be seen after acclimatizing to the hexagon is described as being divided into a hexagon and a circle. As a result, it is noted that adaptation to a circle creates an afterimage of a polygon, adaptation to a polygon often creates a circular afterimage, and adaptation to curves and angles in the brain appears as an afterimage in the afterimage. ing. In the case of dynamic stimuli rather than gaze, it is described that the rotation-adapted stimulus of a circle perceives a hexagonal afterimage, and the hexagonal rotation-adaptive stimulus perceives an afterimage of a circle.

Here, for example, the distance between the combustion appliance and the door as described in Patent Document 1 is not constant and varies from apartment house to apartment house. In addition, the distance between the combustion appliance and the door may differ from house to house even within the same apartment building. Therefore, the exhaust stack and the exhaust top are installed by the combustion appliance installer depending on the situation of the installation location of the combustion appliance.

Japanese Unexamined Patent Publication No. 9-203518

Hiroyuki Ito, "Adaptive Transformation of the Perceptual World by Adaptation", Issue No .: 23243076, Grant-in-Aid for Scientific Research Grants-in-Aid for Scientific Research, Institution No .: 17102, June 2015 12th of March

However, even though the mounting direction of the exhaust stack and exhaust top is specified in the design process or manufacturing process, depending on the situation of the installation location of the combustion appliance, the exhaust stack and exhaust top may be changed from the specified installation state to the exhaust stack. It may be installed in a state where it is displaced in the circumferential direction (rotation direction). Then, when the opening shape of the holes (gap) is substantially rectangular as in the gallery described in Patent Document 1, the arrangement direction of the holes is deviated from the horizontal direction or the vertical direction. As a result, the arrangement of the holes in the net unit becomes unnatural in terms of design, which causes a problem that it is not preferable in terms of aesthetics.

The present invention has been made to solve the above problems, and the arrangement of the holes in the net unit is unnatural in terms of design even when the net unit is installed in a state deviated from the specified installation state in the circumferential direction. It is an object of the present invention to provide an exhaust stack and a combustion device capable of suppressing the occurrence of an optical illusion (psychology).

According to the present invention, the subject is an exhaust stack rotatably attached to a housing of a combustion device for discharging combustion exhaust to the outside, and a frame having a cylindrical shape and the frame. A mesh portion having a hole through which the combustion exhaust passes and having a polygonal hole having an opening shape of hexagon or more, and at least in a direction connecting the centers of the opening shapes of the adjacent holes. It is solved by an exhaust stack characterized by having more than four diagonal lines contrasting with the horizontal line and the vertical line among the lines constituting the opening shape in the specified installation state in which either of them is in the vertical direction or the horizontal direction. To.

According to the above configuration, the net unit attached to the frame has a hole through which the combustion exhaust passes. Since the opening shape of the hole in the mesh portion has a polygonal hole of hexagon or more, the horizontal line and the vertical line among the lines constituting the opening shape of the hole are compared with the case where the opening shape of the hole is triangular and rectangular. There are many diagonal lines that contrast with the lines. Here, the line forming the opening shape of the hole means a side and a diagonal line forming the opening shape of the hole.

For example, when the opening shape of the hole is a rhombus, the holes are often arranged so that the four sides forming the rhombus are diagonal lines that contrast with the horizontal line and the vertical line. Then, the arrangement directions of the holes are the horizontal direction and the vertical direction. Here, the hole arrangement direction means a direction connecting the centers of the opening shapes of adjacent holes. That is, the state in which the holes are arranged in the horizontal direction and the vertical direction is the specified installation state of the exhaust stack when the opening shape of the holes is a rhombus.

At this time, among the lines constituting the rhombus, there are four sides as diagonal lines to be contrasted with the horizontal line and the vertical line. The two diagonals of the rhombus are horizontal and vertical. In this way, when the opening shape of the hole is a rhombus, there are relatively few diagonal lines that contrast with the horizontal line and the vertical line, so if the exhaust stack is installed in a state where it is displaced in the circumferential direction from the specified installation state, It is easy to determine that the arrangement direction of the holes is deviated from the horizontal direction and the vertical direction. Therefore, the arrangement of the holes in the net unit becomes unnatural in terms of design, and it may be perceived as unfavorable in terms of aesthetics. This is the same even when the opening shape of the hole is a triangle, a rectangle, or the like.

On the other hand, in the above configuration, there are many diagonal lines that contrast with the horizontal line and the vertical line among the lines constituting the opening shape of the hole, as compared with the case where the opening shape of the hole is triangular and rectangular. Then, even if the exhaust stack is installed in a state deviated from the specified installation state in the circumferential direction, it is difficult to determine that the hole arrangement direction is deviated from the specified direction. As a result, even when the exhaust stack is installed in a state where it is deviated from the specified installation state in the circumferential direction, it is possible to prevent the arrangement of the holes in the net unit from becoming unnatural in terms of design.

Preferably, the opening shape is a regular hexagon.

According to the above configuration, among the lines constituting the regular hexagon, there are four sides and two diagonal lines as diagonal lines to be contrasted with the horizontal line and the vertical line. That is, when the opening shape of the hole is a regular hexagon, the holes are often arranged so that two of the six sides forming the regular hexagon are horizontal or vertical. Then, as diagonal lines, there are four sides and two diagonal lines. According to this, compared to the case where the opening shape of the hole is triangular and rectangular, there are many diagonal lines that contrast with the horizontal line and the vertical line among the lines constituting the opening shape of the hole (regular hexagon), so that the exhaust stack is Even if the holes are installed in a state deviated from the specified installation state in the circumferential direction, it is difficult to determine that the hole arrangement direction is deviated from the specified direction. As a result, even when the exhaust stack is installed in a state where it is deviated from the specified installation state in the circumferential direction, it is possible to prevent the arrangement of the holes in the net unit from becoming unnatural in terms of design.

Further, since the opening shape of the hole is a regular hexagon, the flat surface can be filled with the regular hexagon, unlike the case where the opening shape of the hole is circular. Therefore, it is possible to reduce unnecessary gaps (flesh) between adjacent holes in the net unit. As a result, a wider opening area can be secured in the net unit.

Preferably, the opening shape is a regular octagon.

According to the above configuration, among the lines constituting the regular octagon, there are four sides and four diagonal lines as diagonal lines to be contrasted with the horizontal line and the vertical line. That is, when the opening shape of the hole is a regular octagon, the holes are often arranged so that two of the eight sides forming the regular octagon are horizontal or vertical. Then, as diagonal lines, there are four sides and four diagonal lines. According to this, compared to the case where the opening shape of the hole is triangular and rectangular, there are many diagonal lines that contrast with the horizontal line and the vertical line among the lines constituting the opening shape of the hole (regular octagon), so that the exhaust stack is Even when the holes are installed in a state deviated from the specified installation state in the circumferential direction, it is difficult to determine that the hole arrangement direction is deviated from the specified direction. As a result, even when the exhaust stack is installed in a state where it is deviated from the specified installation state in the circumferential direction, it is possible to prevent the arrangement of the holes in the net unit from becoming unnatural in terms of design.

Preferably, the opening shape is a regular dodecagon.

According to the above configuration, among the lines constituting the regular dodecagon, there are eight sides and eight diagonal lines as diagonal lines to be compared with the horizontal line and the vertical line. That is, when the opening shape of the hole is a regular dodecagon, the holes are often arranged so that two of the twelve sides constituting the regular dodecagon are horizontal or vertical. Then, as diagonal lines, there are eight sides and eight diagonal lines. According to this, compared to the case where the opening shape of the hole is triangular and rectangular, there are many diagonal lines that contrast with the horizontal line and the vertical line among the lines constituting the opening shape of the hole (regular dodecagon), so that they are excluded. Even when the cylinder is installed in a state where it is deviated from the specified installation state in the circumferential direction, it is difficult to determine that the hole arrangement direction is deviated from the specified direction. As a result, even when the exhaust stack is installed in a state where it is deviated from the specified installation state in the circumferential direction, it is possible to prevent the arrangement of the holes in the net unit from becoming unnatural in terms of design.

Preferably, the net unit is a metal plate-shaped member, and the surface of the net unit is flat.

According to the above configuration, since the net unit is a plate-shaped member and the surface of the net unit is flat, the aesthetic appearance of the net unit can be improved as compared with the case where the net unit is formed of expanded metal or lath metal. it can.

According to the present invention, the subject is directly or indirectly connected to the combustion chamber with a heat exchanger provided inside the combustion chamber of the combustion apparatus and heated by combustion of a burner to exchange heat. The problem is solved by a combustion apparatus including any of the above-mentioned exhaust stacks for discharging the combustion exhaust after the heat exchanger has exchanged heat to the outside.

According to the configuration, the combustion apparatus includes a heat exchanger and any of the exhaust stacks described above. The heat exchanger is provided inside the combustion chamber and is heated by the combustion of the burner to exchange heat. The exhaust stack is directly or indirectly connected to the combustion chamber and is for discharging the combustion exhaust after the heat exchanger exchanges heat to the outside.

In any of the above exhaust stacks, since the opening shape of the hole in the mesh portion has a polygonal hole of hexagon or more, the opening shape of the hole is configured as compared with the case where the opening shape of the hole is triangular or rectangular. There are many diagonal lines that contrast with the horizontal and vertical lines. Then, even if the exhaust stack is installed in a state deviated from the specified installation state in the circumferential direction, it is difficult to determine that the hole arrangement direction is deviated from the specified direction. As a result, even when the exhaust stack is installed in a state where it is deviated from the specified installation state in the circumferential direction, it is possible to prevent the arrangement of the holes in the net unit from becoming unnatural in terms of design.

According to the present invention, the exhaust stack and the exhaust stack can prevent the arrangement of the holes in the net unit from becoming unnatural in terms of design even when the vehicle is installed in a state deviated from the specified installation state in the circumferential direction. A combustion device can be provided.

It is a perspective view which shows the example in which the combustion apparatus which concerns on embodiment of this invention is installed. It is a front view which shows the combustion apparatus which concerns on this embodiment. It is a front view which shows the combustion apparatus which concerns on this embodiment. It is a top view which shows the inside of the combustion apparatus which concerns on this embodiment. It is a perspective view which shows the exhaust stack which concerns on embodiment of this invention. It is a front view which shows the exhaust pipe which concerns on this embodiment. It is a side view which shows the exhaust stack which concerns on this embodiment. It is a front view which shows the exhaust stack which concerns on a comparative example. It is a front view which shows the exhaust stack which concerns on other embodiment of this invention. It is a front view which shows the exhaust pipe which concerns on the modification of this embodiment. It is a front view which shows the exhaust stack which concerns on still another Embodiment of this invention. It is a front view which shows the exhaust pipe which concerns on the modification of this embodiment. It is a front view which shows the deformation example of the hole of the net part.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
Since the embodiments described below are suitable specific examples of the present invention, various technically preferable limitations are added, but the scope of the present invention particularly limits the present invention in the following description. Unless otherwise stated, the present invention is not limited to these aspects.

FIG. 1 is a perspective view showing an example in which a combustion device according to an embodiment of the present invention is installed.
FIG. 2 is a front view showing a combustion device according to the present embodiment.
FIG. 3 is a side view showing the combustion apparatus according to the present embodiment.

As shown in FIG. 1, the combustion device 2 according to the present embodiment is installed, for example, in a passage or a veranda of an apartment house such as an apartment or an apartment. In the example shown in FIG. 1, the combustion device 2 is installed next to the entrance door 6. As shown in FIGS. 1 and 3, in order to improve the appearance of the apartment house, the combustion device 2 may be covered by the door 8 and installed inside the door 8. Such a combustion device is called, for example, an exhaust type inside a door.

The combustion device 2 includes an exhaust stack 10 rotatably attached to the housing 20. The exhaust stack 10 is directly or indirectly connected to the combustion chamber 311 (see FIG. 4) of the combustion appliance 30 (see FIG. 4) provided inside the housing 20, and the combustion generated in the combustion chamber 311 It is for exhausting the exhaust to the outside. As shown in FIG. 3, the tip end portion of the exhaust stack 10 is arranged outside the door 8 through the hole 8a provided in the door 8. As a result, as shown by the arrow A1 shown in FIG. 1, the combustion exhaust gas is discharged to the outside of the door 8 through the exhaust stack 10, that is, to the outside. Further, the exhaust stack 10 is visible from the outside of the door 8.

As shown in FIG. 2, the exhaust stack 10 has a frame body 101 and a net unit 110. The frame body 101 has a cylindrical shape. The net unit 110 is attached to the frame body 101. The net unit 110 is called, for example, a bird net, and prevents birds, rain, wind, etc. from entering the inside of the exhaust stack 10. Details of the exhaust stack 10 will be described later.

FIG. 4 is a plan view showing the inside of the combustion apparatus according to the present embodiment.
Inside the housing 20 of the combustion device 2, for example, the combustion appliance 30 shown in FIG. 4 is installed. The combustion appliance 30 shown in FIG. 4 is an example, and the present invention is not limited to this. The combustion chamber 311 of the combustion appliance 30 is provided with a first burner 303, a second burner 304, a hot water supply latent heat exchanger 301, a hot water supply heat exchanger 302, and a bath heat exchanger 308. There is.

The first burner 303 and the second burner 304 are provided in the vicinity of the hot water supply heat exchanger 302 and the bath heat exchanger 308, and heat the hot water supply heat exchanger 302 and the bath heat exchanger 308. The hot water supply heat exchanger 302 has a large number of fins and is heated by at least one of the first burner 303 and the second burner 304. The bath heat exchanger 308, like the hot water heat exchanger 302, has a large number of fins and is heated by at least one of the first burner 303 and the second burner 304. The hot water supply latent heat exchanger 301 is provided above the hot water supply heat exchanger 302 and the bath heat exchanger 308, and recovers the latent heat contained in the exhaust gas of the combustion chamber 311. That is, the hot water supply latent heat exchanger 301 is the combustion exhaust after the hot water supply heat exchanger 302 and the bath heat exchanger 308 exchange heat by burning at least one of the first burner 303 and the second burner 304. It is provided at the contact position.

A combustion fan 305 and a gas pipe 321 are connected to the combustion chamber 311. The gas pipe 321 is connected to the combustion chamber 311 via the first gas branch pipe 322 and the second gas branch pipe 323.

The combustion fan 305 sends the air required for combustion of the first burner 303 and the second burner 304 to the combustion chamber 311. The gas pipe 321 is branched into a first gas branch pipe 322 and a second gas branch pipe 323. The gas pipe 321 guides the gas required for combustion to the first burner 303 via the first gas branch pipe 322. Further, the gas pipe 321 guides the gas required for combustion to the second burner 304 via the second gas branch pipe 323.

The first gas branch pipe 322 is provided with a first gas solenoid valve 306. The second gas branch pipe 323 is provided with a second gas solenoid valve 307. The first gas solenoid valve 306 and the second gas solenoid valve 307 adjust the opening degree of the valve to control the amount of gas supplied to the first burner 303 and the second burner 304.

The combustion chamber 311 is further provided with a hot water supply tray 309 as a drain (water) receiving portion. When the water vapor present in the combustion exhaust in the combustion chamber 311 condenses on the surface of the hot water supply latent heat exchanger 301 having a relatively low temperature and drops, the dropped drain is stored in the hot water supply tray 309. The hot water supply tray 309 discharges the drain through the drain discharge pipe 328.

The operation of the combustion device 2 will be described by taking a hot water supply operation as an example. The hot water supply operation is an operation of heating water supplied from a water supply source (for example, tap water) and supplying it to a hot water tap. When the hot water tap is opened, water is supplied to the hot water latent heat exchanger 301 by the pressure of the water supplied from the water supply source as shown by the arrow A3 shown in FIG. As shown by arrows A4 and A5 shown in FIG. 4, the water supplied to the hot water latent heat exchanger 301 flows through the inlet pipe 324 and the outlet pipe 325 of the hot water latent heat exchanger 301, and the first burner 303 and It is heated by at least one of the second burners 304. The temperature of the water heated in the hot water latent heat exchanger 301 is, for example, about 30 ± 8 ° C.

Subsequently, as shown by arrows A6 and A7 shown in FIG. 4, the water heated in the hot water supply latent heat exchanger 301 flows through the inlet pipe 326 and the outlet pipe 327 of the hot water supply heat exchanger 302, and the first burner. It is heated by at least one of 303 and the second burner 304. The temperature of the water heated in the hot water supply heat exchanger 302 is, for example, about 80 ° C. As shown by arrow A8 shown in FIG. 4, the water (hot water) heated in the hot water supply latent heat exchanger 301 and the hot water supply heat exchanger 302 is appropriately mixed with the water guided to the bypass pipe (not shown). It is guided to the hot water tap at approximately the same temperature as the hot water set temperature.

FIG. 5 is a perspective view showing an exhaust stack according to an embodiment of the present invention.
FIG. 6 is a front view showing an exhaust stack according to the present embodiment.
FIG. 7 is a side view showing an exhaust stack according to the present embodiment.
Note that FIG. 6A is a front view illustrating the case where the exhaust stack 10 is in the specified installation state. FIG. 6B is a front view illustrating a case where the exhaust stack 10 is deviated from the specified installation state in the circumferential direction (rotational direction).

As shown in FIG. 5, the exhaust stack 10 according to the present embodiment has a frame body 101 and a net unit 110. The frame body 101 has a cylindrical shape. The net unit 110 is attached to the inside of the frame 101, that is, the inside of the cylinder. The net unit 110 has a hole 111 through which the combustion exhaust generated in the combustion chamber 311 passes. The combustion exhaust passes through the hole 111 of the net unit 110 and is discharged to the outside. The net unit 110 of the present embodiment has a polygonal hole 111 having a hexagonal or larger opening shape. Specifically, in the example shown in FIG. 6, the opening shape of the hole 111 is a regular hexagon. A plurality of holes 111 are formed in the net unit 110. The net unit 110 is a metal plate-shaped member, and is formed by punching.

Here, as described above with respect to FIG. 3, the combustion device 2 may be covered by the door 8 and installed inside the door 8. At this time, the distance D1 (see FIG. 3) between the housing 20 of the combustion device 2 and the door 8 is not constant and differs for each apartment house. Further, the distance D1 between the housing 20 of the combustion device 2 and the door 8 may be different for each house even in the same apartment house. Therefore, the exhaust stack 10 is installed by the installer of the combustion device 2 depending on the situation of the installation location of the combustion device 2.

However, although the mounting direction of the exhaust stack 10 is specified in the design process or the manufacturing process, the exhaust stack 10 may be changed from the specified installation state to the exhaust stack 10 (specifically, depending on the situation of the installation location of the combustion device 2). The frame body 101) may be attached in a state of being displaced in the circumferential direction (rotational direction). Then, the arrangement direction of the holes 111 is deviated from the specified direction. Here, in the present specification, the "arrangement direction of holes" means the direction connecting the centers of the opening shapes of adjacent holes. As a result, the arrangement of the holes in the net unit becomes unnatural in terms of design, which may be unfavorable in terms of aesthetics. This will be further described with reference to the drawings.

FIG. 8 is a front view showing an exhaust stack according to a comparative example.
Note that FIG. 8A is a front view illustrating a case where the exhaust stack 10A according to the comparative example is in the specified installation state. FIG. 8B is a front view illustrating a case where the exhaust stack 10A according to the comparative example is in a state deviated from the specified installation state in the circumferential direction (rotational direction).

The exhaust stack 10A according to the comparative example has a frame body 101A and a net unit 110A. The net unit 110A has a hole 111A through which combustion exhaust passes. As shown in FIGS. 8 (a) and 8 (b), the opening shape of the hole 111A of the comparative example is a rhombus. The net unit 110A is formed of, for example, expanded metal or lath metal. Therefore, the surface of the net unit 110A has a step.

As shown in FIG. 8A, when the opening shape of the hole 111A is a rhombus, the four sides 121, 122, 123, 124 forming the rhombus are diagonal lines that contrast with the horizontal line and the vertical line. Hole 111A is often arranged as described above. Then, the direction connecting the centers 112 and 113 of the opening shapes of the adjacent holes 111A (the arrangement direction A16 of the holes 111A) becomes the vertical direction. Further, the direction connecting the centers 114 and 115 of the opening shapes of the adjacent holes 111A (the arrangement direction A17 of the holes 111A) is the horizontal direction. That is, the state shown in FIG. 8A is the specified installation state of the exhaust stack 10A when the opening shape of the hole 111A is a rhombus.

At this time, among the lines constituting the rhombus, there are four sides 121, 122, 123, and 124 as diagonal lines to be compared with the horizontal line and the vertical line. The diamond-shaped diagonal line 141 becomes a horizontal line. Diagonal 142 diamond becomes a vertical line.

Here, as described above with respect to FIGS. 5 to 7, the exhaust stack 10A may be installed in a state where the exhaust stack 10A (specifically, the frame 101A) is deviated from the specified installation state in the circumferential direction. .. Then, as shown in FIG. 8B, since there are relatively few diagonal lines to be compared with the horizontal line and the vertical line, it is determined that the arrangement directions A16 and A17 of the holes 111A are deviated from the horizontal direction and the vertical direction. Cheap. Therefore, the arrangement of the holes 111A of the net unit 110A may be unnatural in design and may be felt to be unfavorable in terms of aesthetics.

On the other hand, returning to FIGS. 5 to 7, the exhaust stack 10 according to the present embodiment will be described. The net unit 110 has a polygonal hole 111 having an opening shape of hexagon or more. The human brain, which visually adapts to the hexagonal or larger polygonal holes 111, often creates a circular afterimage as an afterimage. On the other hand, the combustion device 2 has a substantially quadrangular shape composed of horizontal lines and vertical lines. Therefore, the hole 111 is compared with the horizontal line and the vertical line. When a circular afterimage is formed, even if the exhaust stack 10 is attached in a state of being displaced in the circumferential direction, it is difficult to determine that the exhaust stack 10 is in a state of being displaced from the horizontal direction and the vertical direction. Therefore, the arrangement of the holes 111 of the net unit 110 becomes natural in design and is preferable in terms of aesthetics.

On the other hand, when the afterimage remains a hexagonal or larger polygon, the hole 111 is compared with the horizontal line and the vertical line while remaining a hexagonal or larger polygon. Therefore, as compared with the case where the opening shape of the hole is a triangle, a rectangle, a rhombus, or the like, there are many diagonal lines that contrast with the horizontal line and the vertical line among the lines constituting the opening shape of the hole 111. Then, as shown in FIG. 6B, even when the exhaust stack 10 is installed in a state where it is deviated from the specified installation state in the circumferential direction, the arrangement direction of the holes 111 is deviated from the specified direction. It becomes difficult to determine that it is in a state of being in a state of being. As a result, even when the exhaust stack 10 is installed in a state where it is deviated from the specified installation state in the circumferential direction, it is possible to prevent the arrangement of the holes 111 of the net unit 110 from becoming unnatural in terms of design. ..

As shown in FIG. 1, when the combustion device 2 according to the present embodiment is installed in a passage of an apartment house such as an apartment or an apartment, a person passing through the passage may see the hole 111. At this time, when the hexagon is viewed from the lower left, the lower left corner of the hexagon is the visually closest vertex and the vertex having the largest angle. For example, to explain with reference to FIG. 5, since FIG. 5 is a perspective view of the exhaust stack 10 when viewed from the upper right, the upper right corner of the hexagon is visually the closest apex and the largest angle. Become a vertex with. When the hexagon is viewed from below, the bottom corner is the visually closest vertex and the vertex with the largest angle. When the hexagon is viewed from the lower right, the lower right corner of the hexagon is the visually closest vertex and the vertex with the largest angle. As described above, according to the findings obtained by the present inventor, when a person passing through the passage passes through the hole 111 installed in the passage, the closest apex and the apex having the largest angle change one after another. The viewpoint moves as if the hexagon were rotating. The hexagonal rotation adaptation stimulus perceives an afterimage of a circle, so the hole 111 is recognized as a circle even when the exhaust stack 10 is mounted with the exhaust stack 10 offset in the circumferential direction from the specified installation state. However, it does not become unnatural in terms of design.

Specifically, the opening shape of the hole 111 is a regular hexagon. In this case, as shown in FIG. 6A, two of the six sides 121, 122, 123, 124, 125, and 126 constituting the regular hexagon are horizontal or vertical. Holes are often placed in the. In the example shown in FIG. 6A, the sides 121 and 124 are horizontal.

Then, the direction connecting the centers 112 and 115 of the opening shapes of the adjacent holes 111 (the arrangement direction A11 of the holes 111A) becomes the vertical direction. Further, the direction connecting the centers 112 and 113 of the opening shapes of the adjacent holes 111 (the arrangement direction A12 of the holes 111A) is an oblique direction. Further, the direction connecting the centers 112 and 114 of the opening shapes of the adjacent holes 111 (the arrangement direction A13 of the holes 111A) is an oblique direction. That is, the state shown in FIG. 6A is the specified installation state of the exhaust stack 10 when the opening shape of the hole 111 is a regular hexagon.

At this time, among the lines constituting the regular hexagon, there are four sides 122, 123, 125, 126 and two diagonal lines 141, 142 as diagonal lines to be compared with the horizontal line and the vertical line. One diagonal line 143 becomes a vertical line.

According to this, as compared with the case where the opening shape of the hole is a triangle, a rectangle, a rhombus, or the like, among the lines constituting the opening shape (regular hexagon) of the hole 111, there are many diagonal lines to be compared with the horizontal line and the vertical line. Therefore, even when the exhaust stack 10 is installed in a state deviated from the specified installation state in the circumferential direction, it is difficult to determine that the arrangement direction of the holes 111 is deviated from the specified direction. As a result, even when the exhaust stack 10 is installed in a state where it is deviated from the specified installation state in the circumferential direction, it is possible to prevent the arrangement of the holes 111 of the net unit 110 from becoming unnatural in terms of design. ..

Further, since the opening shape of the hole 111 is a regular hexagon, the flat surface can be filled with the regular hexagon, unlike the case where the opening shape of the hole 111 is circular. Therefore, it is possible to reduce unnecessary gaps (flesh) between adjacent holes 111 in the net unit 110. As a result, a wider opening area can be secured in the net unit 110.

Further, the net unit 110 is a metal plate-shaped member, which is formed by punching. Therefore, the surface of the net unit 110 is flat. Therefore, the aesthetic appearance of the net unit 110 can be improved as compared with the case where the net unit is formed of the expanded metal or the lath metal.

FIG. 9 is a front view showing an exhaust stack according to another embodiment of the present invention.
FIG. 10 is a front view showing an exhaust stack according to a modified example of the present embodiment.
9 (a) and 10 (a) are front views illustrating the case where the exhaust stacks 10B and 10C are in the specified installation state. 9 (b) and 10 (b) are front views illustrating a case where the exhaust stacks 10B and 10C are deviated from the specified installation state in the circumferential direction (rotational direction).

As shown in FIGS. 9A and 9B, the exhaust stack 10B according to the present embodiment has a net unit 110B. In addition, in FIG. 9A and FIG. 9B, the frame body is omitted for convenience of explanation. Similar to the frame 101 described above with respect to FIGS. 5 to 7, the frame of the exhaust stack 10B according to the present embodiment has a cylindrical shape. The net unit 110B is attached to the inside of the frame, that is, the inside of the cylinder.

The net unit 110B has holes 111B and 118B through which the combustion exhaust generated in the combustion chamber 311 passes. The opening shape of the hole 111B is a large regular octagon as compared with the hole 118B. Further, the opening shape of the hole 118B is a small rectangle as compared with the hole 111B. That is, the net unit 110B has a hole 111B having a regular octagonal opening shape. Other structures are the same as the exhaust stack 10 described above with respect to FIGS. 5 to 7.

When a relatively small rectangle and a relatively large regular octagon coexist, humans strongly recognize the relatively large regular octagon. Therefore, the human brain that visually recognizes and adapts to the polygonal hole 111B tends to form a circular afterimage as an afterimage. When a circular afterimage is formed, even if the exhaust stack 10B is attached in a state of being displaced in the circumferential direction, it is difficult to determine that the exhaust stack 10B is in a state of being displaced from the horizontal direction and the vertical direction. Therefore, the arrangement of the holes 111B of the net unit 110B becomes natural in design and is preferable in terms of aesthetics.

On the other hand, if the afterimage remains a regular octagon, the hole 111B remains a regular octagon and is compared to the horizontal and vertical lines. In this case, as shown in FIG. 9A, two of the eight sides 121, 122, 123, 124, 125, 126, 127, 128 constituting the regular octagon are horizontal. Therefore, the holes 111B are often arranged so that the other two sides are vertical. In the example shown in FIG. 9A, the sides 121 and 125 are horizontal. Further, the sides 123 and 127 are vertical.

Then, the direction connecting the centers 112 and 113 of the opening shapes of the adjacent holes 111B (the arrangement direction A21 of the holes 111B) becomes the vertical direction. Further, the direction connecting the centers 112 and 114 of the opening shapes of the adjacent holes 111 (the arrangement direction A22 of the holes 111B) is the horizontal direction. That is, the state shown in FIG. 9A is the specified installation state of the exhaust stack 10B when the opening shape of the hole 111B is a regular octagon.

At this time, among the lines constituting the regular octagon, the four sides 122, 124, 126, 128 and the four diagonal lines 141, 142, 143, 145 are as diagonal lines to be compared with the horizontal line and the vertical line. Exists. One diagonal line 144 becomes a vertical line.

According to this, as compared with the case where the opening shape of the hole is a triangle, a rectangle, a rhombus, or the like, among the lines constituting the opening shape (regular octagon) of the hole 111B, there are many diagonal lines to be compared with the horizontal line and the vertical line. Therefore, even when the exhaust stack 10B is installed in a state deviated from the specified installation state in the circumferential direction, it is difficult to determine that the arrangement direction of the holes 111B is deviated from the specified direction. As a result, even when the exhaust stack 10B is installed in a state where it is deviated from the specified installation state in the circumferential direction, it is possible to prevent the arrangement of the holes 111B of the net unit 110B from becoming unnatural in terms of design. ..

It should be noted that the hole having a rectangular opening shape does not necessarily have to be provided as in the exhaust stack 10C according to the modified example shown in FIGS. 10 (a) and 10 (b). The net unit 110C of the exhaust pipe 10C according to the modified example has a hole 111C through which the combustion exhaust generated in the combustion chamber 311 passes. The opening shape of the hole 111C is a regular octagon. Other structures are the same as the exhaust stack 10B shown in FIGS. 9 (a) and 9 (b). In the exhaust stack 10C according to the modified example, the same effect as the effect of the exhaust stack 10B shown in FIGS. 9A and 9B can be obtained. However, in terms of securing a wider opening area, the exhaust stack 10B shown in FIGS. 9 (a) and 9 (b) is more preferable.

FIG. 11 is a front view showing an exhaust stack according to still another embodiment of the present invention.
Note that FIG. 11A is a front view illustrating the case where the exhaust stack 10D is in the specified installation state. FIG. 11B is a front view illustrating a case where the exhaust stack 10D is deviated from the specified installation state in the circumferential direction (rotational direction).

As shown in FIGS. 11 (a) and 11 (b), the exhaust stack 10D according to the present embodiment has a net unit 110D. In addition, in FIG. 11A and FIG. 11B, the frame body is omitted for convenience of explanation. Similar to the frame 101 described above with respect to FIGS. 5 to 7, the frame of the exhaust stack 10D according to the present embodiment has a cylindrical shape. The net unit 110D is attached to the inside of the frame, that is, the inside of the cylinder.

The net unit 110D has a hole 111D through which the combustion exhaust generated in the combustion chamber 311 passes. The opening shape of the hole 111D is a regular dodecagon. That is, the net unit 110D has a hole 111D having a regular dodecagonal opening shape. Other structures are the same as the exhaust stack 10 described above with respect to FIGS. 5 to 7. The human brain, which has adapted by visually recognizing the hole 111D having a regular dodecagonal opening shape, tends to form a circular afterimage as an afterimage. On the other hand, if the afterimage remains a regular dodecagon, the hole 111D remains a regular dodecagon and is compared to the horizontal and vertical lines.

In this case, as shown in FIG. 11A, the 12 sides 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132 constituting the regular dodecagon The holes 111D are often arranged so that two of the sides are horizontal and the other two sides are vertical. In the example shown in FIG. 11A, the sides 121 and 127 are horizontal. Further, the sides 124 and 130 are vertical.

Then, the direction connecting the centers 112 and 115 of the opening shapes of the adjacent holes 111D (the arrangement direction A31 of the holes 111D) becomes the vertical direction. Further, the direction connecting the centers 112 and 113 of the opening shapes of the adjacent holes 111 (the arrangement direction A32 of the holes 111D) is an oblique direction. Further, the direction connecting the centers 112 and 114 of the opening shapes of the adjacent holes 111 (the arrangement direction A33 of the holes 111D) is an oblique direction. That is, the state shown in FIG. 11A is the specified installation state of the exhaust stack 10D when the opening shape of the hole 111D is a regular octagon.

At this time, among the lines constituting the regular dodecagon, the diagonal lines to be compared with the horizontal line and the vertical line are eight sides 122, 123, 125, 126, 128, 129, 131, 132, and eight diagonal lines. There are 141, 142, 143, 144, 145, 147, 148, 149, and so on. One diagonal line 146 becomes a vertical line.

According to this, as compared with the case where the opening shape of the hole is a triangle, a rectangle, a rhombus, etc., among the lines constituting the opening shape (regular dodecagon) of the hole 111D, the diagonal line contrasting with the horizontal line and the vertical line is There are many. Therefore, even if the exhaust stack 10D is installed in a state deviated from the specified installation state in the circumferential direction, it is difficult to determine that the arrangement direction of the holes 111D is deviated from the specified direction. As a result, even when the exhaust stack 10D is installed in a state where it is deviated from the specified installation state in the circumferential direction, it is possible to prevent the arrangement of the holes 111D of the net unit 110D from becoming unnatural in terms of design. ..

A hole may be formed in the gap between the hole 111D and the hole 111D. In this case, a hole having a triangular opening shape is formed in the gap between the hole 111D and the hole 111D.

FIG. 12 is a front view showing an exhaust stack according to a modified example of the present embodiment.
Note that FIG. 12A is a front view illustrating the case where the exhaust stack 10E is in the specified installation state. FIG. 12B is a front view illustrating a case where the exhaust stack 10E is deviated from the specified installation state in the circumferential direction (rotational direction).

The exhaust stack 10E shown in FIGS. 12 (a) and 12 (b) is a modification of the exhaust stack 10 described above with respect to FIGS. 5 to 7. That is, the exhaust stack 10E according to this modification has a frame body 101 and a net unit 110E. The net unit 110E is attached to the inside of the frame 101, that is, the inside of the cylinder.

The net unit 110E has a hole 111E through which the combustion exhaust generated in the combustion chamber 311 passes. The opening shape of the hole 111E is a regular hexagon. That is, the net unit 110E has a hole 111E having a regular hexagonal opening shape. Six small holes 117 are provided inside the holes 111E. The opening shape of the small hole 117 is an equilateral triangle. That is, the hole 111E is formed by a collection of six equilateral triangular small holes 117. Other structures are the same as the exhaust stack 10 described above with respect to FIGS. 5 to 7. The opening shape of the small holes 117 is an equilateral triangle, but the hole 111E formed by assembling the small holes 117 is likely to be visually recognized as a hexagonal hole. Therefore, the human brain tends to create a circular afterimage as an afterimage. On the other hand, when the afterimage remains hexagonal, the hole 111E formed by assembling the small holes 117 is compared with the horizontal line and the vertical line while remaining hexagonal.

In this case, as shown in FIG. 12A, two of the six sides 121, 122, 123, 124, 125, 126 constituting the regular hexagon are horizontal or vertical. Holes are often placed in the. In the example shown in FIG. 12A, the sides 121 and 124 are horizontal.

Then, the direction connecting the centers 112 and 115 of the opening shapes of the adjacent holes 111E (the arrangement direction A11 of the holes 111E) is the vertical direction. Further, the direction connecting the centers 112 and 113 of the opening shapes of the adjacent holes 111E (the arrangement direction A12 of the holes 111E) is an oblique direction. Further, the direction connecting the centers 112 and 114 of the opening shapes of the adjacent holes 111E (the arrangement direction A13 of the holes 111E) is an oblique direction. That is, the state shown in FIG. 12A is the specified installation state of the exhaust stack 10E when the opening shape of the hole 111E formed by assembling the six equilateral triangular small holes 117 is a regular hexagon.

At this time, among the lines constituting the regular hexagon, there are four sides 122, 123, 125, 126 and two diagonal lines 141, 142 as diagonal lines to be compared with the horizontal line and the vertical line. One diagonal line 143 becomes a vertical line.

According to this, as compared with the case where the opening shape of the hole is a triangle, a rectangle, a rhombus, etc., the line forming the opening shape (regular hexagon) of the hole 111E formed by aggregating the small holes 117 of six equilateral triangles. Of these, there are many diagonal lines that contrast with the horizontal and vertical lines. Therefore, even if the exhaust stack 10E is installed in a state deviated from the specified installation state in the circumferential direction, it is difficult to determine that the arrangement direction of the holes 111E is deviated from the specified direction. As a result, even when the exhaust stack 10E is installed in a state where it is deviated from the specified installation state in the circumferential direction, it is possible to prevent the arrangement of the holes 111E of the net unit 110E from becoming unnatural in terms of design. ..

FIG. 13 is a front view showing a modified example of the holes in the net unit.
The tops of the polygons constituting the holes 111, 111B, 111C, 111D, 111E described above with respect to FIGS. 6 (a), 6 (b), and 9 (a) to 12 (b) have a soft impression in terms of design. It is preferable to give a little roundness in order to give. Further, the polygon does not have to be a regular polygon, and the thickness of the net unit 110 does not have to be uniform.

For example, like the hole 111F shown in FIG. 13, it is preferable that the top of the polygon forming the hole 111F is provided with a round portion having a roundness. From this, it is possible to give a soft impression in terms of design. Further, the polygon forming the hole 111F is not a regular hexagon. Specifically, the two sides 121 and 124 are shorter than the four sides 122, 123, 125 and 126. The widths (thicknesses) D11 and D14 between the two sides 121 and 124 and the adjacent sides are the widths (thickness) D11 and D14 between the four sides 122, 123, 125 and 126 and the adjacent sides. Shorter (thinner) than the widths D12, D13, D15, D16 between.

As shown in FIG. 13, even if the polygons constituting the hole 111F are not regular hexagons and the net thickness is not uniform, human beings can see if the polygons constituting the holes 111F are regular hexagons. The hole 111F can be visually recognized without any discomfort. As a result, even when the exhaust stack is installed in a state where it is deviated from the specified installation state in the circumferential direction, it is possible to prevent the arrangement of the holes 111F of the net unit from becoming unnatural in terms of design.

The present invention uses an optical illusion (psychology) so that the arrangement of the holes in the net unit does not become unnatural in terms of design. An optical illusion is a so-called optical illusion. The illusion is a cognitive illusion if it is literally "deception". Cognitive illusions can be corrected (for example, misunderstandings can be corrected). The optical illusion, on the other hand, is a perceptual illusion. Perceptual illusions cannot correct "deception." In other words, the arrangement of the holes in the net unit is designed even when the exhaust stack is installed with the exhaust stack deviated from the specified installation state in the circumferential direction using an uncorrectable "deception" (illusion). It is designed so that it does not become unnatural.

The embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of claims. The configuration of the above embodiment may be partially omitted or may be arbitrarily combined so as to be different from the above.

2 ... Combustion device, 6 ... Entrance door, 8 ... Door, 8a ... Hole, 10, 10A, 10B, 10C, 10D, 10E ... Exhaust pipe, 20 ... Housing, 30 ... Combustion equipment, 101, 101A ... Frame, 110, 110A, 110B, 110C, 110D, 110E ... Net part, 111, 111A, 111B, 111C, 111D, 111E, 111F ... Hole , 112, 113, 114, 115 ... Center, 117 ... Small hole, 118B ... Hole, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132.・ ・ Side, 141, 142, 143, 144, 145, 146, 147, 148, 149 ... Diagonal, 301 ... Hot water supply latent heat exchanger, 302 ... Hot water supply heat exchanger, 303 ... No. 1 burner, 304 ... 2nd burner, 305 ... combustion fan, 306 ... 1st gas electromagnetic valve, 307 ... 2nd gas electromagnetic valve, 308 ... bath heat exchanger , 309 ... hot water tray, 311 ... combustion chamber, 321 ... gas pipe, 322 ... first gas branch pipe, 323 ... second gas branch pipe, 324 ... inlet pipe , 325 ... outlet pipe, 326 ... inlet pipe, 327 ... outlet pipe, 328 ... drain discharge pipe

Claims (6)

It is an exhaust stack that is rotatably attached to the housing of the combustion device and exhausts the combustion exhaust to the outside.
A frame with a cylindrical shape and
A net unit attached to the frame and through which the combustion exhaust passes and having a polygonal hole having an opening shape of hexagon or more.
Equipped with a,
In the specified installation state in which at least one of the directions connecting the centers of the opening shapes of the adjacent holes is the vertical direction or the horizontal direction, the horizontal line and the diagonal line to be compared with the vertical line among the lines constituting the opening shape. The exhaust stack is characterized by having more than four . The exhaust stack according to claim 1, wherein the opening shape is a regular hexagon. The exhaust stack according to claim 1, wherein the opening shape is a regular octagon. The exhaust stack according to claim 1, wherein the opening shape is a regular dodecagon. The net unit is a metal plate-shaped member.
The exhaust stack according to any one of claims 1 to 4, wherein the surface of the net unit is flat. A heat exchanger provided inside the combustion chamber of the combustion device and heated by combustion of a burner to exchange heat.
The exhaust stack according to any one of claims 1 to 5, which is directly or indirectly connected to the combustion chamber and discharges the combustion exhaust after the heat exchanger exchanges heat to the outside. When,
Combustion device characterized by being equipped with.

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