JP5726820B2 - Heat source machine - Google Patents

Description

  The present invention relates to a heat source machine such as a water heater.

  Conventionally, a first pipe through which a medium such as water flows, a second pipe, a heat exchanger that connects both pipes to heat the medium, and a combustion section that generates combustion gas that exchanges heat with the medium in the heat exchanger A heat source device such as a water heater provided with a fan for supplying combustion air to the combustion unit is known (see, for example, Patent Document 1).

  The thing of patent document 1 is provided with the housing | casing which accommodates a heat exchanger, a combustion part, and a fan, and the inlet port which takes in air is provided in the front lower part of this housing | casing.

JP 2005-180782 A

  In the conventional heat source machine, it is difficult to secure the space of the piping with the recent miniaturization, and the first piping or the second piping may be arranged so as to cross the vicinity of the fan inlet. In this case, if the air sucked into the fan hits the piping, and there is a lot of air hitting the piping, the air that is greatly disturbed by the piping enters the fan suction port as it is, the air supply pressure to the fan is not stable, noise due to vibration noise May occur.

  An object of this invention is to provide the heat source machine which can suppress generation | occurrence | production of the noise by piping by the side of the suction inlet of a fan in view of the above point.

[1] In order to achieve the above object, the present invention provides heat for heating a medium by communicating the first pipe through which the medium flows, the second pipe through which the medium flows, the first pipe and the second pipe. An exchanger, a combustion unit that generates combustion gas that exchanges heat with the medium by the heat exchanger, a fan that supplies air to the combustion unit, the heat exchanger, the combustion unit, and the fan are accommodated a housing, a heat source unit and a suction port provided in the housing, the inlet side of the fan, a portion of said first pipe or said second pipe, a previous intake plug mouth A suppression plate that is arranged so as to cross and is provided in the ventilation path from the intake port to the intake port is provided to suppress the flow of air to the part .

  According to the present invention, the suppression plate suppresses the flow of air to the pipe, reduces the amount of air hitting the pipe, suppresses air turbulence by the pipe, stabilizes the air supply pressure to the fan, and vibrates. Generation of sound can be suppressed. For this reason, this invention can suppress generation | occurrence | production of the noise by the piping located in the suction inlet side of a fan.

  [2] In the present invention, the suppression plate may be fixed to the fan. According to this, it becomes difficult for the air that enters the suction port of the fan to directly hit the pipe by the suppression plate, and it is easy to flow avoiding the pipe and the air is not disturbed by the pipe. For this reason, the air supply pressure to a fan is stabilized and the noise by vibration sound can be suppressed. Further, if the suppression plate is fixed to the fan in advance, the suppression plate can also be disposed at the same time when the fan is disposed in the housing, which facilitates assembly.

Explanatory drawing which shows the heat-source equipment of embodiment of this invention in a partial cross section from the front. Explanatory drawing which shows the heat-source equipment of this embodiment in a partial cross section from the right side surface. (A) is explanatory drawing which shows the relationship between the inlet of a fan of this embodiment, and a suppression board. (B) is explanatory drawing which shows the fan of this embodiment from the suction inlet side.

  The heat source device of the embodiment of the present invention is a water heater. As shown in FIGS. 1 and 2, the heat source device 1 of the present embodiment includes a combustion unit 21 accommodated in a casing 11 and heat disposed in the casing 11 and above the combustion unit 21. And an exchanger 22.

  The heat exchanger 22 is connected to a first pipe 31 that is a water supply pipe and a second pipe 32 that is a hot water discharge pipe. The first pipe 31 and the second pipe 32 communicate with each other through the heat exchanger 22, and the medium that has passed through the first pipe 31 passes through the heat exchanger 22 and is guided to the second pipe 32. In other words, one of the first pipes 31 is connected to a water supply pipe (not shown), the other is connected to the heat exchanger 22, one of the second pipes 32 is connected to the heat exchanger 22, and the other is not shown. Connected to hot water piping. The medium of this embodiment is water.

  Gas is supplied to the combustion unit 21 from a gas pipe (not shown). In the combustion part 21, the supplied gas and the air supplied from the fan 4 mentioned later are burned, and combustion gas is produced | generated.

  In the heat exchanger 22, water is heated by exchanging heat between water as a medium flowing inside and the combustion gas generated in the combustion unit 21. As a result, the water supplied from the first pipe 31 is heated by the heat exchanger 22 to become hot water, and this hot water is supplied through the second pipe 32 from a hot water supply pipe (not shown).

  Below the combustion unit 21, a fan 4 that supplies combustion air to the combustion unit 21 is provided. Below the front surface of the housing 11, three air inlets 11 a for taking outside air into the housing 11 are provided side by side in the horizontal direction. An exhaust port 11 b for discharging combustion gas is provided above the housing 11.

  The fan 4 is provided with a suction port 4a for sucking air and a discharge port 4b for discharging air. The suction port 4a is opened on the back side of the fan, and the discharge port 4b is opened in the upper part. The air taken in from the air inlet 11 a of the housing 11 flows toward the air inlet 4 a of the fan 4. At this time, most of the air taken into the housing 11 from the air inlet 11a passes through the lower portion of the housing 11 from the air inlet 11a so that the distance to the air inlet 4a of the fan 4 is the shortest. It is sucked in from the suction port 4a so as to go around from below. The air sucked into the fan 4 from the suction port 4a is supplied to the combustion unit 21 through the discharge port 4b.

  Between the fan back surface (suction port side) provided with the suction port 4a of the fan 4 and the rear plate of the housing 11, a first pipe 31 serving as a water supply pipe is positioned near the lower portion of the suction port 4a. Is arranged so as to cross a part of the fan parallel to the rear face of the fan. In the present embodiment, the flow path from the intake port 11a to the intake port 4a through the gap at the bottom of the housing 11 from the bottom to the intake port 4a has the shortest distance that the combustion air flows, and the flow of the flowing air It corresponds to the ventilation path 5 with the largest amount.

  On the back surface of the fan where the inlet 4a of the fan 4 is provided, a suppression plate 6 that is positioned below the first pipe 31 and suppresses the flow of air sent from below the fan 4 is perpendicular to the back surface of the fan 4. It is provided to become. The suppression plate 6 prevents the air flow from below the fan 4 from directly hitting the first pipe 31. And it is suppressed that the air from the lower part of the fan 4 hits the 1st piping 31 crossing the back lower side of the suction inlet 4a, and it prevents that the combustion air is taken in in the fan 4 in the disordered state, It is possible to stabilize the air supply pressure to the fan 4 and suppress the generation of noise due to the vibration noise from the first pipe 31.

  Further, since the suppression plate 6 is fixed to the fan 4, when the heat source device 1 is assembled, the suppression plate 6 can also be disposed together with the fan 4, and the heat source device 1 can be easily assembled.

  Next, with reference to Fig.3 (a) and FIG.3 (b), the relationship between the suction inlet 4a and the suppression board 6 is demonstrated. FIG. 3A is an enlarged view of the portion of the fan 4 in FIG. FIG. 3B shows the fan 4 from the suction port side. Here, the diameter of the minimum diameter portion of the suction port 4a of the fan 4 is A, the distance from the central axis of the suction port 4a to the suppression plate 6 is B, and the width of the suppression plate 6 is C (see FIG. 3B). The height of the suppression plate 6 is defined as D, and the distance from the first pipe 31 to the central axis of the suction port 4a is defined as L.

  In the heat source unit 1, when L / A <1.75, if a large amount of combustion air enters the fan 4 from the lower side of the fan 4, the combustion air is disturbed by the first pipe 31, and this disturbed air Is taken in by the fan 4, the air supply pressure of the fan 4 becomes unstable, and vibration noise is generated. In order to prevent this, the suppression plate 6 provided on the fan 4 is attached to the back surface of the fan 4 so that B / A ≧ 1.75. As a result, the air entering the suction port 4a of the fan 4 is less likely to hit the first pipe 31 by the suppression plate 6, the combustion air is less likely to be disturbed by the first pipe 31, the air supply pressure of the fan 4 is stabilized, and the vibration Sound is suppressed. If B / A ≧ 1.75, the suppression plate 6 does not become the resistance of the combustion air sucked into the fan 4 from the suction port 4a, and the combustion does not deteriorate.

  The width C of the suppression plate 6 is set to be equal to or greater than the diameter A of the minimum diameter portion of the suction port 4a, and the height D of the suppression plate 6 is equal to or greater than the distance H from the rear surface of the fan 4 to the rear surface side of the first pipe 31. It is set to be.

  In the present embodiment, the heat source unit 1 has been described as a water heater. However, the heat source machine of the present invention is not limited to this. For example, the heat source machine of the present invention may be a heat source machine for a heater. In this case, the first pipe can be defined as a return pipe for returning the medium, and the second pipe can be defined as an outgoing pipe for sending the medium to the heater. In this case, the medium may not be water.

  Moreover, in this embodiment, although the suppression board 6 was provided in the fan 4, this invention is not limited to this. A suppression plate is provided in the middle of the ventilation path where the flow of the combustion air entering the suction port 4a of the fan 4 hits the first piping 31 crossing the rear surface of the fan 4 from the suction port 11a below the front surface of the housing 11, For example, as shown by a broken line in FIG. 2, the combustion air flowing from the intake port 11 a below the front surface of the housing 11 toward the fan 4 through the lower portion of the housing 11 may be used. Even if the suppression plate 6 ′ is provided so as to extend from the bottom surface of the housing 11 toward the fan 4 so as to be suppressed, the effect of the present invention that the generation of noise by the first pipe 31 can be suppressed can be obtained.

  Further, in the present embodiment, the first pipe 31 is disposed so as to cross the lower side of the suction port 4a between the rear surface of the fan provided with the suction port 4a of the fan 4 and the rear plate of the housing 11. Explained the heat source machine. However, the heat source apparatus of the present invention is not limited to this. For example, the distance from the air inlet 11a to the air inlet 4a of the fan 4 is the shortest on the left and right lateral sides of the fan 4, and the air inlet 4a When there is a first pipe crossing the horizontal portion, a suppression plate is provided in the ventilation path between the intake port 11a and the first pipe so as to suppress the air flowing from the intake port 11a to the fan 4 through the first pipe. What is necessary is just to provide.

  Moreover, in this embodiment, although the heat source machine arrange | positioned across the 1st piping 31 between the fan back surface in which the suction inlet 4a of the fan 4 was provided, and the rear plate of the housing | casing 11 was demonstrated, The present invention can be similarly applied to a heat source device in which two pipes are arranged so as to cross between the rear surface of the fan and the rear plate of the housing 11.

DESCRIPTION OF SYMBOLS 1 ... Heat source machine, 11 ... Housing | casing, 11a ... Intake port, 11b ... Exhaust port, 21 ... Combustion part, 22 ... Heat exchanger, 31 ... 1st piping, 32 ... 2nd piping, 4 ... Fan, 4a ... Suction Mouth, 4b ... discharge port, 5 ... ventilation path, 6, 6 '... suppression plate.

Claims (2)

A first pipe through which the medium flows, a second pipe through which the medium flows, a heat exchanger that heats the medium by communicating the first pipe and the second pipe, and heat exchange with the medium through the heat exchanger A combustion section that generates combustion gas to be produced; a fan that supplies air to the combustion section; a housing that houses the heat exchanger, the combustion section, and the fan; and an intake port provided in the housing; A heat source machine comprising:
On the suction port side of the fan, a part of the first piping or the second piping is arranged so as to cross the front of the suction port ,
A heat source machine, wherein a suppression plate that suppresses the flow of air to the part is provided in a ventilation path from the intake port to the intake port. The heat source machine according to claim 1,
The heat source machine, wherein the suppression plate is fixed to the fan.

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