CN114659274A

CN114659274A - Combustion apparatus and water heating apparatus

Info

Publication number: CN114659274A
Application number: CN202111463222.3A
Authority: CN
Inventors: 唐木竜也
Original assignee: Noritz Corp
Current assignee: Noritz Corp
Priority date: 2020-12-22
Filing date: 2021-12-02
Publication date: 2022-06-24
Also published as: US20220196284A1; JP2022098738A

Abstract

The invention provides a combustion apparatus and a water heating apparatus. The combustion device includes a chamber, a burner, a fan housing, and a fan. The chamber has an upper wall. An inflow port is formed in the upper wall, penetrates the upper wall in the first direction, and communicates with the internal space of the chamber. The burner is mounted in the chamber so as to face the upper wall in the first direction with a space therebetween. The fan case is formed with a discharge port that penetrates the fan case in the first direction and communicates with the internal space of the fan case. The ejection port is connected to the inflow port. The fan is disposed in the inner space of the fan housing. The rotation axis of the fan is along a first direction. According to the combustion apparatus and the water heating apparatus of the present invention, the height can be reduced.

Description

Combustion apparatus and water heating apparatus

Technical Field

The present invention relates to a combustion apparatus and a water heating apparatus.

Background

Patent document 1 (japanese patent No. 6571445) discloses a combustion apparatus. The combustion apparatus described in patent document 1 includes a combustion chamber, an intake fan housing, an intake fan, and a fan motor. The intake fan is disposed inside the intake fan housing. An inlet port is formed in the upper wall of the combustion chamber. The fan motor rotates the intake fan about a rotation axis along the horizontal direction, whereby the air-fuel mixture is sucked into the intake fan housing, and is supplied into the combustion chamber through an air-fuel mixture flow path formed in the intake fan housing and an inlet port formed in the upper wall.

Patent document 2 (japanese patent No. 6534337) discloses a combustion apparatus. The combustion apparatus described in patent document 2 includes a burner body (burner body) main body, a planar burner, a fan housing, a fan, and a motor. The planar burner is disposed opposite to the burner main body in the up-down direction to seal the inner space of the burner main body. An inlet port that opens in the horizontal direction is formed in the burner main body.

A fan is disposed inside the fan housing. The fan casing is provided with a discharge port that opens in the horizontal direction. The fan case is connected to the inlet of the burner main body at the outlet. The mixed gas sucked into the fan case is supplied to the internal space of the burner main body through the outlet port and the inlet port by the rotation of the fan.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent No. 6571445 publication

[ patent document 2] Japanese patent No. 6534337

Disclosure of Invention

[ problems to be solved by the invention ]

In the combustion apparatus described in patent document 1, since the rotation axis of the intake fan is along the horizontal direction, the vertical dimension of the intake fan housing portion is increased. In the combustion apparatus described in patent document 2, since the inlet is opened in the horizontal direction, the vertical dimension of the burner main body is increased. That is, it is difficult to achieve a low profile in the combustion apparatus described in patent document 1 and the combustion apparatus described in patent document 2.

The present invention has been made in view of the above-described problems of the conventional art. More specifically, the present invention provides a combustion apparatus and a water heating apparatus that can achieve a reduction in height.

[ means for solving problems ]

The combustion device comprises a chamber, a combustor, a fan shell and a fan. The chamber has an upper wall. An inflow port is formed on the upper wall, penetrates the upper wall along the first direction, and is communicated with the inner space of the chamber. The burner is mounted in the chamber so as to be opposed to the upper wall with a space therebetween in the first direction. The fan case is formed with an ejection port that penetrates the fan case along the first direction and communicates with the internal space of the fan case. The ejection port is connected to the inflow port. The fan is disposed in the inner space of the fan housing. The rotation axis of the fan is along a first direction.

In the combustion apparatus, the fan housing may have a bottom wall partially overlapping the chamber in a plan view. The ejection port may be formed in a portion of the bottom wall overlapping the chamber. In the combustion apparatus, a suction port may be formed in a portion of the bottom wall that does not overlap the chamber, the suction port penetrating the bottom wall in the first direction and communicating with the internal space of the fan casing.

In the above combustion apparatus, the chamber may further include a cylindrical first peripheral wall that surrounds the flow inlet and protrudes in the first direction. The fan housing may further have a cylindrical second peripheral wall that surrounds the ejection port and protrudes in the first direction. The ejection port may be connected to the inflow port by inserting the second peripheral wall into the first peripheral wall. A sealing member may be disposed between the inner peripheral surface of the first peripheral wall and the outer peripheral surface of the second peripheral wall.

In the above-described combustion apparatus, the inlet may be located at the center of the chamber in a plan view. In the combustion apparatus, the chamber and the fan housing may be integrally formed.

The water heating device of the invention comprises a frame body, a fixing component and the combustion device. The frame body is opened at one side of a second direction orthogonal to the first direction. The fan housing is mounted to the chamber through a fixing member from one side of the chamber in the second direction.

[ Effect of the invention ]

According to the combustion apparatus and the water heating apparatus of the present invention, the height can be reduced.

Drawings

Fig. 1 is a schematic view of a water heating apparatus 100.

Fig. 2 is a front view of the combustion apparatus 200.

Fig. 3 is a plan view of the combustion apparatus 200.

Fig. 4 is a cross-sectional view on IV-IV in fig. 3.

Fig. 5 is a schematic perspective view of the frame 300.

[ description of symbols ]

10: air valve

11: throttle orifice

12: venturi tube

13: air supply device

14: chamber

15: burner with a burner head

16: spark plug

20: primary heat exchanger

20 a: water inlet

20 b: water outlet

30: secondary heat exchanger

30 a: water inlet

30 b: water outlet

40: catheter tube

50: piping

60: piping

70: piping

71: three-way valve

80: bypass piping

100: water heating device

131: fan shell

131 a: upper wall

131 b: bottom wall

131 c: side wall

131 d: the first part

131 e: the second part

131 f: air inlet

131 g: discharge port

131 h: through hole

131 i: peripheral wall

131 j: trough

132: motor with a stator having a stator core

132 a: motor body

132 b: shaft

133: fan (Ref. TM. Fan)

141: upper wall

141 a: inlet port

141 b: outer surface

142: side wall

143: peripheral wall

144: sealing member

145: fixing member

200: combustion apparatus

300: frame body

301: upper wall

302: bottom wall

303: side wall

304: side wall

305: back wall

306: opening part

D: inner diameter

DR 1: a first direction

DR 2: second direction

DR 3: third direction

H: height

Detailed Description

The details of the embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and repeated description thereof will not be repeated.

(Structure of Water heating apparatus of embodiment)

The structure of the water heating apparatus (referred to as "water heating apparatus 100") according to the embodiment will be described below.

< schematic structure of water heating apparatus 100 >

Fig. 1 is a schematic view of a water heating apparatus 100. As shown in fig. 1, the water heating apparatus 100 includes a gas valve 10, an orifice 11, a venturi (venturi)12, an air blower 13, a chamber 14, a burner 15, an ignition plug 16, a primary heat exchanger 20, a secondary heat exchanger 30, a duct 40, a pipe 50, a pipe 60, a pipe 70, and a bypass pipe 80. The blower 13, the chamber 14, and the burner 15 may be collectively referred to as a combustion apparatus 200. Details of the combustion apparatus 200 will be described later.

When the gas valve 10 is opened, the fuel gas is supplied to the venturi tube 12 through the orifice 11. The fuel gas supplied to the venturi 12 is mixed with air in the venturi 12 (hereinafter, the fuel gas mixed with air is referred to as a mixed gas). The mixed gas is supplied to the combustor 15 through the chamber 14 by the blower 13. The mixture gas supplied to the burner 15 is ignited by the spark plug 16 emitting a spark, and is burned. Thereby, combustion gas is generated in the combustor 15.

The pipe 50 is connected to a tap water pipe at one end thereof. The pipe 50 is connected at the other end to the water inlet 30a of the secondary heat exchanger 30. The pipe 60 is connected at one end thereof to the water outlet 30b of the secondary heat exchanger 30. The pipe 60 is connected at the other end to the water inlet 20a of the primary heat exchanger 20. The pipe 70 is connected at one end thereof to the water outlet 20b of the primary heat exchanger 20. The other end of the pipe 70 is connected to a hot water supply faucet (not shown).

The bypass pipe 80 is connected to the pipe 50 at one end and to the pipe 70 at the other end. The bypass pipe 80 and the pipe 70 are connected by a three-way valve 71. The conduit 40 is connected to the secondary heat exchanger 30.

The water supplied from one end of the pipe 50 flows through the pipe 50 and is supplied to the secondary heat exchanger 30. The water supplied to the secondary heat exchanger 30 is heated by heat exchange with the combustion gas. The water flowing through the secondary heat exchanger 30 is supplied to the primary heat exchanger 20 through the pipe 60. The water supplied to the primary heat exchanger 20 is heated by heat exchange with the combustion gas.

The water flowing through the primary heat exchanger 20 is mixed with the water flowing through the bypass pipe 80 in the pipe 70, and is thereby subjected to temperature adjustment. The water flowing through the pipe is supplied from a hot water supply faucet. The combustion gas that has exchanged heat with the water flowing through the primary heat exchanger 20 and the secondary heat exchanger 30 is discharged to the outside through the duct 40.

The water heating apparatus 100 further includes a frame 300. The air valve 10, the orifice 11, the venturi tube 12, the blower 13, the chamber 14, the burner 15, the ignition plug 16, the primary heat exchanger 20, the secondary heat exchanger 30, the duct 40, the pipe 50, the pipe 60, the pipe 70, and the bypass pipe 80 are housed in the housing 300.

< detailed Structure of Combustion apparatus 200 >

Fig. 2 is a front view of the combustion apparatus 200. Fig. 3 is a plan view of the combustion apparatus 200. Fig. 4 is a cross-sectional view on IV-IV in fig. 3. As shown in fig. 2 to 4, the combustion apparatus 200 includes the blower 13, the chamber 14, and the burner 15.

The blower 13 includes a fan housing 131, a motor 132, and a fan 133. The fan housing 131 has an upper wall 131a, a bottom wall 131b, and a side wall 131 c. The upper wall 131a and the bottom wall 131b face each other with a gap in the first direction DR 1. The first direction DR1 corresponds to, for example, the up-down direction. The side wall 131c is connected to the upper wall 131a and the bottom wall 131 b. An inner space of the fan housing 131 is defined by the upper wall 131a, the bottom wall 131b, and the side wall 131 c.

The fan case 131 is disposed so as to partially overlap the cavity 14 in a plan view (when viewed along the first direction DR 1), for example. A portion of the fan case 131 overlapping the cavity 14 in a plan view is referred to as a first portion 131d, and a portion of the fan case 131 not overlapping the cavity 14 in a plan view is referred to as a second portion 131 e.

Fan case 131 is provided with an air inlet 131f and an outlet 131 g. The air inlet 131f and the discharge port 131g communicate with the internal space of the fan housing 131. The air inlet 131f and the discharge port 131g penetrate the fan housing 131 along the first direction DR 1. More specifically, the intake port 131f is formed in the bottom wall 131b at the second portion 131 e. Further, the ejection port 131g is formed in the bottom wall 131b located in the first portion 131 d. Further, although not shown, the venturi 12 is connected to the intake port 131 f.

The fan housing 131 further has a through hole 131 h. The through hole 131h penetrates the fan housing 131 along the first direction DR1 and communicates with the inner space of the fan housing 131. More specifically, the through-hole 131h is formed in the upper wall 131a of the second portion 131 e.

The fan housing 131 also has a peripheral wall 131 i. The peripheral wall 131i surrounds the ejection port 131 g. The peripheral wall 131i is cylindrical and protrudes from the outer surface of the bottom wall 131b in the first direction DR 1.

The motor 132 has a motor body 132a and a shaft 132 b. The motor body 132a is disposed on the upper wall 131 a. The shaft 132b extends along a first direction DR 1. The shaft 132b is inserted into the through hole 131 h. The motor body 132a rotates the shaft 132b about the central axis of the shaft 132 b.

The fan 133 is disposed in the inner space of the fan housing 131. The fan 133 is mounted to the shaft 132 b. Accordingly, the motor body 132a rotates the shaft 132b, so that the fan 133 rotates in the inner space of the fan housing 131 around the rotation shaft along the first direction DR 1. The mixed gas is sucked into the fan housing 131 through the inlet 131f as the fan 133 rotates. Then, the mixed gas sucked into the fan case 131 is discharged from the discharge port 131g as the fan 133 rotates.

The chamber 14 has an upper wall 141 and a sidewall 142. The inner space of the chamber 14 is partitioned by the upper wall 141 and the side wall 142.

An inflow port 141a is formed in the upper wall 141. The inflow port 141a penetrates the upper wall 141 along the first direction DR 1. The inlet 141a communicates with the internal space of the chamber 14. The inlet 141a is formed in a portion of the upper wall 141 overlapping the fan case 131 in plan view. The inflow port 141a is connected to the discharge port 131 g. That is, the mixed gas is supplied to the internal space of the chamber 14 through the discharge port 131g and the inflow port 141 a. The inner diameter of the inlet 141a is defined as an inner diameter D.

The chamber 14 also has a peripheral wall 143. The peripheral wall 143 surrounds the inflow port 141 a. The peripheral wall 143 is cylindrical and protrudes from the outer surface 141b of the upper wall 141 along the first direction DR 1. The inner diameter of peripheral wall 143 is equal to or larger than the outer diameter of peripheral wall 131 i. By inserting peripheral wall 131i into peripheral wall 143, ejection port 131g and inflow port 141a are connected.

A seal member 144 is disposed between the outer peripheral surface of peripheral wall 131i and the inner peripheral surface of peripheral wall 143. More specifically, a groove 131j recessed toward the inner circumferential surface of the circumferential wall 131i is formed in the outer circumferential surface of the circumferential wall 131 i. The groove 131j is formed annularly. In the groove 131j, a seal member 144 is disposed. Thereby, a space between the ejection port 131g and the inflow port 141a (a space between the peripheral wall 131i and the peripheral wall 143) is hermetically sealed. The sealing member 144 is, for example, an O-ring.

The height of the chamber 14 is set to a height H. The height H is a distance between the outer surface 141b and the lower end of the side wall 142 (the end of the side wall 142 opposite to the upper wall 141) in the first direction DR 1. The height H is for example smaller than the inner diameter D.

Hereinafter, a direction orthogonal to the first direction DR1 is referred to as a second direction DR 2. The fan housing 131 is mounted to the chamber 14 by a fixing member 145. More specifically, the fan housing 131 is mounted to the upper wall 141 from one side of the second direction DR2 by the fixing member 145.

The burner 15 is mounted to the chamber 14. The burners 15 are disposed to face the upper wall 141 at intervals in the first direction DR 1. The burner 15 is mounted to the side wall 142. The burner 15 is attached to the chamber 14, thereby closing the inner space of the chamber 14.

The burner 15 is formed with a combustion hole (not shown). The combustion hole penetrates the burner 15 in the thickness direction and communicates with the internal space of the chamber 14. The mixed gas supplied to the internal space of the chamber 14 is ejected from the combustion hole. The mixed gas discharged from the combustion hole is ignited by the ignition plug 16, and is thereby combusted, and a flame is generated on the outer surface side of the combustor 15. That is, the outer surface of the burner 15 serves as a combustion surface of the burner 15.

Fig. 5 is a schematic perspective view of the frame 300. As shown in fig. 5, the frame 300 has an upper wall 301, a bottom wall 302, a side wall 303, and a side wall 304. The upper wall 301 and the bottom wall 302 face each other with a space in the first direction DR 1. The

side walls

303 and 304 face each other with a gap in the third direction DR 3. The third direction DR3 is a direction orthogonal to the first direction DR1 and the second direction DR 2. The third direction DR3 corresponds to the horizontal direction.

The frame 300 also has a back wall 305. One end of the housing 300 in the second direction DR2 is an opening 306 defined by an upper wall 301, a bottom wall 302, a side wall 303, and a side wall 304. The other end of the frame 300 in the second direction is closed by a back wall 305. As described above, the fan housing 131 is mounted at the end of the upper wall 141 at one side of the second direction DR2 by the fixing member 145. Therefore, the fixing member 145 is located at a position visible from the opening portion 306 of the frame 300.

(Effect of the Combustion apparatus and Water heating apparatus of the embodiment)

The effects of the combustion apparatus 200 and the water heating apparatus 100 will be described below.

In the combustion apparatus 200, the direction of the rotation axis of the fan 133 is along the first direction DR 1. Therefore, the size of the fan housing 131 in the first direction DR1 can be reduced.

When the inlet 141a is formed along the direction orthogonal to the first direction DR1, the dimension (height H) of the cavity 14 in the first direction DR1 cannot be made smaller than the inner diameter D. However, in the combustion apparatus 200, the inlet 141a is formed in the upper wall 141 along the first direction DR1, and the outlet 131g connected to the inlet 141a is formed in the fan case 131 along the first direction DR1, so that the height H (specifically, the height H is smaller than the inner diameter D) can be reduced.

Drain generated in the internal space of the fan housing 131 (water condensed in the internal space of the fan housing 131) may enter the chamber 14 through the outlet 131g and the inlet 141 a. In the combustion apparatus 200, the sealing member 144 is disposed between the inner peripheral surface of the peripheral wall 143 and the outer peripheral surface of the peripheral wall 131i, and therefore the contact of the drain with the sealing member 144 can be suppressed.

In the combustion apparatus 200, the fan housing 131 is mounted to the chamber 14 (the upper wall 141) from one side thereof in the second direction DR2 by the fixing member 145. In the housing 300, an opening 306 is provided on one side in the second direction DR 2. Therefore, according to the water heating apparatus 100, the fixing member 145 can be visually observed from the opening 306, and thus the fixing member 145 can be easily detached.

(first modification)

The inlet 141a may be formed at the center of the upper wall 141 in plan view. In this case, the same chamber 14 can be shared between the structure in which the fan case 131 is disposed on one side in the third direction DR3 of the chamber 14 and the structure in which the fan case 131 is disposed on the other side in the third direction DR3 of the chamber 14.

(second modification)

Although the groove 131j is formed on the outer peripheral surface of the peripheral wall 131i, an annular groove may be formed on the inner peripheral surface of the peripheral wall 143 instead of the groove 131j, and the sealing member 144 may be disposed in the annular groove. At this time, similarly to the case where the groove 131j is formed, adhesion of drainage generated in the internal space of the fan housing 131 to the sealing member 144 can be suppressed.

(third modification)

Although the fan housing 131 and the chamber 14 are different members, respectively, the fan housing 131 and the chamber 14 may be integrally formed (formed of one member). In this case, the sealing member 144 is not required, and thus the number of parts is reduced. In this case, the peripheral structures of the inlet 141a and the outlet 131g can be easily designed.

As described above, the embodiments of the present invention have been described, but various modifications can be made to the above embodiments. The scope of the present invention is not limited to the above-described embodiments. The scope of the present invention is indicated by the appended claims, and all changes that come within the meaning and range of equivalency of the claims are intended to be embraced therein.

[ industrial applicability ]

The present embodiment is particularly advantageously applicable to a combustion device and a water heating device having the same.

Claims

1. A combustion apparatus, comprising:

a chamber;

a burner;

a fan housing; and

a fan is arranged on the base plate, and a fan,

the chamber has an upper wall and a lower wall,

an inflow port is formed in the upper wall, penetrates the upper wall along a first direction, and communicates with an inner space of the chamber,

the burner is mounted in the chamber so as to be opposed to the upper wall with a space therebetween in the first direction,

a discharge port that penetrates the fan case along the first direction and communicates with an internal space of the fan case is formed in the fan case,

the ejection port is connected to the inflow port,

the fan is disposed in the inner space of the fan housing,

the rotation axis of the fan is along the first direction.

2. The combustion apparatus of claim 1, wherein

The fan housing has a bottom wall which partially coincides with the chamber in plan view,

the ejection port is formed in a portion of the bottom wall that overlaps with the chamber.

3. The combustion apparatus of claim 2, wherein

A suction port is formed in a portion of the bottom wall that does not overlap the chamber, the suction port penetrating the bottom wall along the first direction and communicating with an internal space of the fan housing.

4. A combustion apparatus according to claim 1 or 2, wherein

The chamber further has a cylindrical first peripheral wall surrounding the inflow port and protruding in the first direction,

the fan housing further has a cylindrical second peripheral wall that surrounds the ejection port and protrudes in the first direction,

the ejection port is connected to the inflow port by inserting the second peripheral wall into the first peripheral wall,

a sealing member is disposed between an inner peripheral surface of the first peripheral wall and an outer peripheral surface of the second peripheral wall.

5. A combustion apparatus according to any one of claims 1 to 3, wherein

The inflow port is located at the center of the chamber in a plan view.

6. A combustion apparatus according to any one of claims 1 to 3, wherein

The height of the chamber in the first direction is smaller than the inner diameter of the inflow port.

7. The combustion apparatus of claim 1, wherein

The chamber and the fan housing are integrally formed.

8. A water heating apparatus comprising:

a frame body;

a fixing member; and

the combustion apparatus according to any one of claims 1 to 6,

the frame body is opened at one side of a second direction orthogonal to the first direction,

the fan housing is mounted to the chamber through the fixing member from one side of the chamber in the second direction.