Combustion heat source machine

Abstract

To provide a technique capable of suppressing vibration of a motor.SOLUTION: The combustion heat source machine 2 includes a burner 20, a combustion chamber 12 accommodating the burner 20 and having an inner intake port 70 through which air to be supplied to the burner 20 flows in, and an exhaust port 76 through which combustion exhaust gas from the burner 20 flows out, a combustion fan 60 disposed near the exhaust port 76 and causing the combustion exhaust gas to flow out from the combustion chamber 12, and a body case 10 accommodating the burner 20, the combustion chamber 12, and the combustion fan 60. The combustion fan 60 includes an impeller 40, a fan case 54 that houses the impeller 40, a drive shaft 43 coupled to the impeller 40, a motor 42 that rotates the drive shaft 43, and a motor support member 44 that is fixed to the fan case 54 and supports the motor 42. The motor support member 44 is also fixed to the main body case 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a combustion heat source machine. [Background technology]

[0002] Patent Document 1 discloses a combustion heat source machine. The combustion heat source machine includes a burner, a combustion chamber that houses the burner and has an air intake port through which air supplied to the burner flows in and an exhaust port through which combustion exhaust from the burner flows out, a combustion fan that is disposed near the exhaust port and causes the combustion exhaust to flow out of the combustion chamber, and a main body case that houses the burner, the combustion chamber, and the combustion fan. The combustion fan includes an impeller, a fan case that houses the impeller, a drive shaft connected to the impeller, and a motor that rotates the drive shaft. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-173671 Summary of the Invention [Problem to be solved by the invention]

[0004] As described above, in a so-called tension-type combustion heat source device in which the combustion fan is located downstream of the burner and heat exchanger with respect to the flow of combustion exhaust gas, the motor for rotating the impeller is sometimes fixed to the fan case via a motor support member. However, in such a tension-type combustion heat source device, because high-temperature combustion exhaust gas passes through the fan case, it is necessary to position the motor as far away from the fan case as possible to prevent the motor from overheating. In this case, the farther the motor is positioned from the fan case, the more likely the motor support member is to bend, resulting in greater motor vibration. This specification provides a technology that can suppress motor vibration. [Means for solving the problem]

[0005] A combustion heat source apparatus according to a first aspect of the present specification may include a burner, a combustion chamber housing the burner and having an air intake port through which air supplied to the burner flows and an exhaust port through which combustion exhaust gas from the burner flows, a combustion fan disposed near the exhaust port and causing the combustion exhaust gas to flow out of the combustion chamber, and a main body case housing the burner, the combustion chamber, and the combustion fan. The combustion fan may include an impeller, a fan case housing the impeller, a drive shaft connected to the impeller, a motor that rotates the drive shaft, and a motor support member fixed to the fan case and supporting the motor. The motor support member may also be fixed to the main body case.

[0006] According to the above configuration, the motor support member that supports the motor is fixed not only to the fan case but also to the main body case, so even if the motor is placed away from the fan case, the motor support member is less likely to bend, and motor vibration can be suppressed.

[0007] In a second aspect, in the combustion heat source machine of the first aspect described above, the position at which the motor support member is fixed to the main body case may be located between one end and the other end of the motor in the direction in which the drive shaft extends.

[0008] According to the above configuration, the motor support member is fixed to the main body case at a position close to the motor (i.e., a position far from the fan case) in the direction in which the drive shaft extends, making the motor support member less likely to bend and more effectively suppressing motor vibration.

[0009] In a third aspect, in the first or second aspect above, the motor support member may be abutted and fixed to the fan case along the direction in which the drive shaft extends, and the motor support member may be abutted and fixed to the main body case along a direction perpendicular to the direction in which the drive shaft extends.

[0010] According to the above configuration, vibrations in the direction in which the drive shaft extends can be suppressed by the motor support member being fixed in contact with the fan case, and vibrations in a direction perpendicular to the direction in which the drive shaft extends can be suppressed by the motor support member being fixed in contact with the main body case.

[0011] In a fourth aspect, the combustion heat source machine of any of the first to third aspects above may be configured so that maintenance of the internal components of the main body case can be performed from the front side of the main body case, and the main body case may have a back plate arranged on the rear side of the main body case, and the motor support member may be fixed to the back plate of the main body case.

[0012] According to the above configuration, it is possible to further improve the workability when performing maintenance on the combustion heat source machine.

[0013] In a fifth aspect, with respect to the combustion heat source machine of any one of the first to fourth aspects above, the portion of the motor support member that is fixed to the motor, the portion that is fixed to the fan case, and the portion that is fixed to the main body case may be formed seamlessly and integrally.

[0014] According to the above configuration, the rigidity of the motor support member can be further improved, and the number of parts of the combustion heat source device can be reduced.

[0015] In a sixth aspect, in the combustion heat source machine of the third aspect described above, the motor support member may include a base portion fixed to the motor, legs extending from the base portion toward the fan case in the direction in which the drive shaft extends, a first fixing portion provided at the tip of the legs and fixed to the fan case, an extension portion extending in a direction perpendicular to the direction in which the drive shaft extends from the base portion toward the main body case, and a second fixing portion provided at the tip of the extension portion and fixed to the main body case.

[0016] According to the above configuration, the configuration of the motor support member can be simplified. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 2 is a front view of the internal configuration of the combustion heat source unit 2 of the embodiment. [Figure 2] FIG. 2 is a front view of the internal configuration of the combustion fan 60 of the combustion heat source unit 2 of the embodiment. [Figure 3] 10 is a perspective view of a motor support member 44 of the combustion heat source unit 2 of the embodiment, as viewed from above on the front right. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] (Example) As shown in FIG. 1, the combustion heat source device 2 of this embodiment includes a main body case 10, a combustion chamber 12, a burner 20, a heat exchanger 30, a combustion fan 60, a water supply passage 90, a hot water outlet passage 92, a gas supply unit 94, and a control device 100. The operation of the burner 20, the combustion fan 60, the gas supply unit 94, and the like are controlled by the control device 100. In the following description, the front-rear, up-down, left-right, and right-left directions are defined based on the combustion heat source device 2 installed on the wall of a house. The up-down direction here specifically refers to the up-down direction along the vertical direction. Furthermore, the front-rear direction is defined as the direction toward the wall of the house as seen from the combustion heat source device 2, and the opposite direction from the back is defined as the forward direction.

[0019] The main body case 10 houses a combustion chamber 12, a burner 20, a heat exchanger 30, a combustion fan 60, a water supply passage 90, a hot water outlet passage 92, a gas supply unit 94, and a control device 100. The main body case 10 has a generally rectangular parallelepiped shape. The main body case 10 includes a back panel 10a, a top panel 10b, a bottom panel 10c, a right side panel 10d, a left side panel 10e, and a front panel (not shown). The back panel 10a, the top panel 10b, the bottom panel 10c, the right side panel 10d, and the left side panel 10e are integrally formed. The front panel is detachably attached to the top panel 10b, the bottom panel 10c, the right side panel 10d, and the left side panel 10e. With the front panel removed, maintenance of the components housed inside the main body case 10 can be performed from the front of the combustion heat source unit 2. The back panel 10a is provided with multiple external air intakes 14. Additionally, an exhaust pipe 56 is provided on the top plate 10b.

[0020] The combustion chamber 12 includes a combustion chamber body 50 and an exhaust duct 52. The combustion chamber body 50 houses the burner 20 and the heat exchanger 30. The combustion chamber body 50 has a substantially rectangular parallelepiped shape. The lower surface of the combustion chamber body 50 is provided with a plurality of internal intake ports 70 that open downward. In addition, the upper surface of the combustion chamber body 50 is provided with a communication port 72 that opens upward.

[0021] The burner 20 is disposed at a lower position inside the combustion chamber main body 50. The burner 20 combusts fuel gas supplied from a gas supply unit 94. The heat exchanger 30 is disposed above the burner 20 inside the combustion chamber main body 50. A water supply passage 90 and a hot water outlet passage 92 are connected to the heat exchanger 30. The heat exchanger 30 heats low-temperature water flowing in from the water supply passage 90 with the heat of combustion of the burner 20, and causes the high-temperature water to flow out into the hot water outlet passage 92.

[0022] The exhaust duct 52 is fixed to the upper part of the combustion chamber main body 50 so as to cover the communication port 72 of the combustion chamber main body 50. The exhaust duct 52 has an exhaust port 76 that opens to the right, above the communication port 72. A combustion fan 60 is attached to the exhaust port 76. The combustion exhaust gas that flows into the exhaust duct 52 through the communication port 72 passes through the exhaust duct 52 and flows out to the combustion fan 60 through the exhaust port 76. The combustion fan 60 discharges the combustion exhaust gas from the exhaust port 76 to the outside of the main body case 10 through the exhaust stack 56.

[0023] As shown in Fig. 2, the combustion fan 60 is, for example, a sirocco fan. The combustion fan 60 includes a fan case 54, an impeller 40, a motor 42, a drive shaft 43, a motor support member 44, and a motor cooling fan 46. As shown in Fig. 1, the fan case 54 houses the impeller 40 and communicates between the exhaust port 76 of the exhaust duct 52 and the exhaust pipe 56 of the main body case 10.

[0024] As shown in FIG. 2, the impeller 40 is mechanically coupled to the motor 42 via a drive shaft 43. The drive shaft 43 extends in the left-right direction along the rotation axis Rx of the motor 42. When the motor 42 is operating, the impeller 40 rotates by receiving power from the drive shaft 43. As shown in FIG. 1, as the impeller 40 rotates, air inside the main body case 10 flows into the combustion chamber 12 through the internal air intake port 70, and combustion exhaust gas inside the combustion chamber 12 flows into the fan case 54 through the exhaust port 76. Furthermore, as the impeller 40 rotates, combustion exhaust gas inside the fan case 54 is discharged to the outside of the main body case 10 through the exhaust stack 56.

[0025] As shown in FIG. 2, the motor 42 includes a stator 42a, a rotor 42b, a bearing 42c, and a motor case 42d. The stator 42a is fixed to the motor case 42d. The stator 42a includes a coil (not shown) wound around a core (not shown). The rotor 42b is fixed to a drive shaft 43. The rotor 42b includes a permanent magnet (not shown). The drive shaft 43 is supported by the motor case 42d via the bearing 42c so as to be rotatable about a rotation axis Rx. The motor case 42d houses the stator 42a and the rotor 42b. The motor 42 rotates the drive shaft 43 by sequentially switching the current flowing through the coil of the stator 42a, thereby sequentially switching the attractive force / repulsive force caused by the magnetic force generated between the core of the stator 42a and the permanent magnet of the rotor 42b. In this specification, the "end of motor 42" in the direction in which drive shaft 43 extends refers to the end of motor case 42d. Motor case 42d is fixed to fan case 54 via motor support member 44.

[0026] The motor cooling fan 46 is disposed outside the fan case 54, outside the motor case 42d. The motor cooling fan 46 is fixed to the drive shaft 43. When the motor 42 is operating, the rotation of the drive shaft 43 rotates the motor cooling fan 46, and air is blown onto the motor case 42d, thereby cooling the motor 42.

[0027] As shown in FIG. 3 , the motor support member 44 includes a base portion 44a having a wide, annular shape centered on the rotation axis Rx of the motor 42, a plurality of leg portions 44b bent leftward from the radially outer end of the base portion 44a, a plurality of first fixing portions 44c bent radially inward from the tip of each of the leg portions 44b, an extension portion 44d extending radially outward from the radially outer end of the base portion 44a, and a second fixing portion 44e bent rightward from the tip of the extension portion 44d. The base portion 44a, the plurality of leg portions 44b, the plurality of first fixing portions 44c, the extension portion 44d, and the second fixing portion 44e are seamlessly and integrally formed. For example, the motor support member 44 is manufactured by sheet metal processing of a metal material.

[0028] 2, the base portion 44a of the motor support member 44 abuts against the motor case 42d in the left-right direction and is fixed with screws 41. Each of the multiple first fixing portions 44c of the motor support member 44 abuts against the fan case 54 in the left-right direction and is fixed with screws 41. The second fixing portion 44e abuts against the back plate 10a of the main body case 10 (see FIG. 1) in the front-rear direction and is fixed with screws 41. The position at which the second fixing portion 44e is fixed to the back plate 10a in the left-right direction is located between the left end of the motor 42 and the right end of the motor 42.

[0029] (Variation) The motor support member 44 does not have to be formed as a single unit, but may be configured by combining a plurality of parts.

[0030] The combustion fan 60 does not have to be a sirocco fan, but may be an axial flow fan.

[0031] The motor 42 may be an AC motor or a DC motor.

[0032] The second fixing portion 44e of the motor support member 44 does not have to be fixed to the back panel 10a of the main body case 10, but may be fixed to the top panel 10b, right side panel 10d, left side panel 10e, front panel, etc. of the main body case 10.

[0033] (Correspondence) As described above, in one or more embodiments, the combustion heat source device 2 includes the burner 20, the combustion chamber 12 that houses the burner 20 and has an internal intake port 70 (an example of an intake port) through which air supplied to the burner 20 flows in, an exhaust port 76 through which combustion exhaust from the burner 20 flows out, the combustion fan 60 that is disposed near the exhaust port 76 and causes the combustion exhaust to flow out of the combustion chamber 12, and the main body case 10 that houses the burner 20, the combustion chamber 12, and the combustion fan 60. The combustion fan 60 includes an impeller 40, a fan case 54 that houses the impeller 40, a drive shaft 43 connected to the impeller 40, a motor 42 that rotates the drive shaft 43, and a motor support member 44 that is fixed to the fan case 54 and supports the motor 42. The motor support member 44 is also fixed to the main body case 10.

[0034] According to the above configuration, the motor support member 44 that supports the motor 42 is fixed not only to the fan case 54 but also to the main body case 10. Therefore, even if the motor 42 is placed away from the fan case 54, the motor support member 44 is less likely to bend, and vibration of the motor 42 can be suppressed.

[0035] In one or more embodiments, with respect to the direction in which the drive shaft 43 extends (e.g., the left-right direction), the position at which the motor support member 44 is fixed to the main body case 10 (e.g., the second fixing portion 44e) is located between the right end (an example of one end) and the left end (an example of the other end) of the motor 42.

[0036] According to the above configuration, the motor support member 44 is fixed to the main body case 10 at a position closer to the motor 42 (i.e., a position farther from the fan case 54) in the direction in which the drive shaft 43 extends, making the motor support member 44 less likely to bend and more effectively suppressing vibration of the motor 42.

[0037] In one or more embodiments, the motor support member 44 is fixed in contact with the fan case 54 along the direction in which the drive shaft 43 extends (e.g., the left-right direction), and the motor support member 44 is fixed in contact with the main body case 10 along a direction perpendicular to the direction in which the drive shaft 43 extends (e.g., the front-to-back direction).

[0038] According to the above configuration, vibrations in the direction in which the drive shaft 43 extends (e.g., the left-right direction) can be suppressed by the motor support member 44 abutting and fixed to the fan case 54, and vibrations in the direction perpendicular to the direction in which the drive shaft 43 extends (e.g., the front-to-back direction) can be suppressed by the motor support member 44 abutting and fixed to the main body case 10.

[0039] In one or more embodiments, the combustion heat source unit 2 is configured so that maintenance of the internal components of the main body case 10 can be performed from the front side of the main body case 10. The main body case 10 has a back plate 10a disposed on the rear side of the main body case 10. The motor support member 44 is fixed to the back plate 10a of the main body case 10.

[0040] According to the above configuration, the workability when performing maintenance on the combustion heat source unit 2 can be further improved.

[0041] In one or more embodiments, the motor support member 44 is formed so that the portion fixed to the motor 42 (e.g., base portion 44a), the portion fixed to the fan case 54 (e.g., first fixing portion 44c), and the portion fixed to the main body case 10 (e.g., second fixing portion 44e) are seamlessly and integrally formed.

[0042] The above configuration can further improve the rigidity of the motor support member 44. In addition, the number of parts of the combustion heat source unit 2 can be reduced.

[0043] In one or more embodiments, the motor support member 44 comprises a base portion 44a fixed to the motor 42, a leg portion 44b extending in the direction in which the drive shaft 43 extends from the base portion 44a toward the fan case 54 (e.g., the left-right direction), a first fixing portion 44c provided at the tip of the leg portion 44b and fixed to the fan case 54, an extension portion 44d extending in a direction (e.g., the front-to-back direction) perpendicular to the direction in which the drive shaft 43 extends from the base portion 44a toward the main body case 10 (e.g., the left-to-right direction), and a second fixing portion 44e provided at the tip of the extension portion 44d and fixed to the main body case 10.

[0044] According to the above configuration, the configuration of the motor support member 44 can be simplified.

[0045] The technical elements described in this specification or drawings exhibit technical utility either alone or in various combinations, and are not limited to the combinations set forth in the claims at the time of filing. Furthermore, the technologies illustrated in this specification or drawings can achieve multiple objectives simultaneously, and achieving one of these objectives is itself technically useful. [Explanation of symbols]

[0046] 2: Combustion heat source machine 10: Main unit case 10a: Back plate 10b: Top plate 10c: Bottom plate 10d: Right side plate 10e: Left side board 12: Combustion chamber 14: External air intake 20: Burner 30: Heat exchanger 40: Impeller 41: Screw 42: Motor 42a: Stator 42b: rotor 42c: bearing 42d: Motor case 43: Drive shaft 44: Motor support member 44a: Base part 44b: Legs 44c: 1st fixed part 44d: Extension part 44e:Second fixed part 46: Motor cooling fan 50: Combustion chamber body 52: Exhaust duct 54: Fan case 56:Exhaust pipe 60: Combustion fan 70: Internal air intake 72: Connecting port 76: Exhaust port 90: Water supply channel 92: Hot water outlet 94: Gas supply unit 100: Control device Rx: Rotation axis

Claims

1. A combustion heat source machine, Burner and a combustion chamber that accommodates the burner and has an intake port through which air supplied to the burner flows in and an exhaust port through which combustion exhaust gas from the burner flows out; a combustion fan disposed near the exhaust port for causing the combustion exhaust gas to flow out of the combustion chamber; a main body case that houses the burner, the combustion chamber, and the combustion fan, The combustion fan is An impeller and a fan case that houses the impeller; a drive shaft coupled to the impeller; a motor for rotating the drive shaft; a motor support member fixed to the fan case and supporting the motor, The combustion heat source machine, wherein the motor support member is also fixed to the main body case.

2. The combustion heat source machine according to claim 1 , wherein the position at which the motor support member is fixed to the main body case is located between one end and the other end of the motor in relation to the direction in which the drive shaft extends.

3. the motor support member is fixed to the fan case in contact with the fan case along the direction in which the drive shaft extends, The combustion heat source machine according to claim 1 , wherein the motor support member is fixed in contact with the main body case along a direction perpendicular to the direction in which the drive shaft extends.

4. The combustion heat source machine is configured so that maintenance of components inside the main body case can be performed from the front side of the main body case, the main body case includes a back plate disposed on a rear side of the main body case, The combustion heat source machine according to claim 1 , wherein the motor support member is fixed to the back plate of the main body case.

5. The combustion heat source machine of claim 1, wherein the motor support member has a portion fixed to the motor, a portion fixed to the fan case, and a portion fixed to the main body case that are formed seamlessly and integrally.

6. The motor support member is a base portion fixed to the motor; a leg portion extending from the base portion toward the fan case in a direction in which the drive shaft extends; a first fixing portion provided at a tip of the leg portion and fixed to the fan case; an extension portion extending from the base portion toward the main body case in a direction perpendicular to the direction in which the drive shaft extends; The combustion heat source machine according to claim 3 , further comprising: a second fixing portion provided at a tip of the extension portion and fixed to the main body case.

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