Wall-mounted petroleum water heater

Abstract

To provide a wall-mounted petroleum water heater that suppresses noise generation.SOLUTION: The present invention relates to a wall-mounted petroleum water heater that comprises, in a housing 1 consisting of a front plate 1a, a back plate 1b, a top plate 1c, a bottom plate 1d, and right and left plates 1e: a pressure atomization type burner 2 which supplies a combustion gas into a combustion chamber 4; a heat exchanger which is located below the burner 2, and recovers latent heat from a combustion gas produced through burning of the burner 2 to heat water running in a heat reception pipe; and a silencer 6 which is located below the heat exchanger to reduce noise accompanying the discharging of the combustion gas produced by the burner 2. The wall-mounted petroleum water heater also has wall metal fittings 1f for fitting the housing 1 on a wall, wherein at least one of the burner 2 and the heat exchanger is fixed inside the back plate 1b. A sound absorber 27 is arranged in front of the silencer 6 to reduce vibrations of the silencer 6, so that noise generation is suppressed.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a wall-mounted oil-fired hot water supply device in which the housing of the hot water supply device is installed on an indoor or outdoor wall surface. [Background technology]

[0002] Conventionally, a known type of oil-fired water heater is a stationary type that has a pressure spray burner, a heat exchanger that recovers sensible heat from combustion gas to heat water, and a silencer that reduces noise caused by the exhaust of combustion gas generated by the burner, arranged in this order from top to bottom. Since the weight of the burner and heat exchanger is borne by the silencer, vibrations are reduced and noise generation is suppressed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-163237 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a wall-mounted oil water heater like the present invention, at least one of the burner and heat exchanger is fixed to the housing of the oil water heater, so unlike a free-standing oil water heater, no weight is placed on the silencer, and therefore it is not possible to suppress the vibration of the silencer due to weight from above, resulting in noise generation being an issue. [Means for solving the problem]

[0005] In order to solve the above-mentioned problems, the present invention provides a wall-mounted oil-fired water heater comprising a housing consisting of a front panel, a back panel, a top panel, a bottom panel, and left and right panel panels, a pressure spray burner that supplies combustion gas into a combustion chamber, a heat exchanger located below the burner that recovers sensible heat from the combustion gas generated by combustion of the burner and heats water flowing through a heat receiving pipe, and a silencer located below the heat exchanger that reduces noise associated with the emission of combustion gas generated by the burner, and has wall fixing brackets for attaching the housing to a wall, and at least one of the burner and the heat exchanger is fixed to the inside of the back panel, and sound-absorbing material is placed in front of the silencer.

[0006] A silencer support member is provided below the silencer, and one end of the silencer support member is fixed to the front side of the silencer and the other end is fixed to the inside of the bottom plate.

[0007] The sound absorbing material has heat insulating properties, and the silencer support member is configured to hold the sound absorbing material. [Effects of the Invention]

[0008] According to this invention, the vibration caused by the silencer swaying back and forth can be reduced by the sound-absorbing material, and noise caused by the vibration can be suppressed. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic diagram of a wall-mounted oil hot water heater according to an embodiment of the present invention; [Figure 2] The same front view. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 10 is an enlarged side view of the main part when the silencer support part is attached. [Figure 6] 3A and 3B are side views and enlarged cross-sectional views of essential parts for explaining each fixing method. DETAILED DESCRIPTION OF THE INVENTION

[0010] Next, an embodiment of the present invention will be described with reference to the drawings, taking a latent heat recovery type hot water heater as an example. The indoor wall-mounted housing of this embodiment is designated by reference numeral 1. Housing 1 is composed of a front panel 1a, a back panel 1b, a top panel 1c, a bottom panel 1d, and left and right panels 1e, and is fixed to the wall via wall fixing brackets 1f.

[0011] Reference numeral 2 denotes a pressure spray burner, which is a combustion section that uses fuel such as oil and generates a downward flame, 3 denotes an exhaust fan that supplies combustion air to burner 2 and exhausts exhaust gases after combustion outdoors, 4 denotes a combustion chamber located below burner 2, and 5 denotes a primary heat exchange section that is located within combustion chamber 4 and is composed of a heat exchanger that recovers sensible heat from the combustion exhaust gases generated as burner 2 burns and heats water flowing through a heat receiving pipe.

[0012] Reference numeral 5a denotes a heat exchange fixture that fixes the primary heat exchange section 5 to the back plate 1b, and the back plate 1b supports part of the weight of the primary heat exchange section 5.

[0013] Reference numeral 6 denotes a silencer that is located downstream of the combustion chamber 4, one end of which is connected to the bottom of the combustion chamber 4 and which reduces noise caused by the discharge of exhaust gas generated by the burner 2, and the other end of the silencer 6 is connected to a secondary heat exchanger 7, which serves as a heat exchanger formed from a stainless steel box, via an exhaust duct 8. The secondary heat exchanger 7 is made up of a heat exchanger that recovers latent heat, and performs heat exchange on the combustion exhaust gas that has passed through the silencer 6 until it drops below the dew point, generating condensate. Reference numeral 9 denotes an exhaust path that discharges the exhaust gas that has passed through the secondary heat exchanger 7 to the outside of the housing 1, and is connected to the silencer 6 and exhaust duct 8.

[0014] Reference numeral 6a denotes a silencer hook that fixes the silencer 6 to the back plate 1b, and the back plate 1b supports part of the weight of the silencer 6.

[0015] Reference numeral 10 denotes a drain neutralization tank that is connected to the secondary heat exchange section 7 and temporarily stores the drain generated in the secondary heat exchange section 7. At the center of the top surface is an inlet 11 that is connected to the secondary heat exchange section 7 and through which the drain flows in. There are two partition walls on the inlet and outlet sides, and the inside is filled with a neutralizing agent made of calcium carbonate. The highly acidic drain generated in the secondary heat exchange section 7 that flows in from the inlet 11 is stored and neutralized, and then drained from an outlet 12 formed at the top of one side wall. There is also a drain plug 13 at the bottom that allows all of the drain water inside to be discharged.

[0016] Reference numeral 14 denotes a water supply pipe, 15 denotes an outlet pipe, 16 denotes a water supply bypass pipe branching off from the water supply pipe 14, 17 denotes a mixing valve that mixes hot water from the outlet pipe 15 with water from the water supply bypass pipe 16 and can vary the mixing ratio, 18 denotes a hot water supply pipe that supplies the hot water mixed by the mixing valve 17 to a hot water tap (not shown), 19 denotes a water supply temperature sensor installed in the water supply pipe 14 that detects the water supply temperature, 20 denotes a flow rate sensor installed in the water supply pipe 14 that detects the flow rate, and 21 denotes a hot water temperature sensor installed in the hot water supply pipe 18 that detects the hot water supply temperature.

[0017] Reference numeral 23 denotes an electrical board built into the housing 1 and having a control unit 22, which is mainly a microcomputer and receives signals from each sensor in the housing 1 and controls the operation of each actuator.The input side is connected to the water supply temperature sensor 19, flow rate sensor 20, and hot water temperature sensor 21, and the output side is connected to the burner 2, exhaust fan 3, and mixing valve 17, respectively.

[0018] Next, the operation of this embodiment will be described. When a hot water tap at an appropriate location is opened to start supplying hot water, flow sensor 20 detects the flow of water, and when the flow rate reaches or exceeds the minimum operating flow rate that starts combustion in burner 2, control unit 22 determines that heat is required and drives an electromagnetic pump (not shown) and an igniter (not shown) to start combustion in burner 2. The combustion exhaust gas generated by this combustion flows into primary heat exchanger 5, where it exchanges heat with feedwater. After passing through primary heat exchanger 5, the combustion exhaust gas makes a U-turn from downward to upward in silencer 6, flows upward through exhaust duct 8 into secondary heat exchanger 7, where it exchanges heat with the feedwater flowing into secondary heat exchanger 7, passes through secondary heat exchanger 7, and is then discharged to the outside through exhaust path 9.

[0019] The hot water whose temperature has risen in this secondary heat exchange section 7 flows into the primary heat exchange section 5, where it is further heated by heat exchange with the combustion exhaust gas generated by the combustion of the burner 2, and is then supplied as hot water from the hot water tap.At this time, the control section 22 adjusts the combustion amount of the burner 2 and the opening degree of the mixing valve 17 so that the temperature detected by the hot water temperature sensor 21 matches the hot water setting temperature set by the user.

[0020] Furthermore, heat exchange occurs between the feed water and the combustion exhaust gas in the primary heat exchange section 5 and the secondary heat exchange section 7, and the drain water generated when the temperature drops below the dew point is stored in the drain neutralization tank 10 via the inlet 11 from the secondary heat exchange section 7, neutralized by the neutralizing agent filled in the drain neutralization tank 10, and then discharged outside the housing 1 from the outlet 12.

[0021] Next, the characteristic structure of this embodiment will be described. A primary heat exchange section 5 is located below the burner 2, a silencer 6 is located below the primary heat exchange section 5, and a silencer support member 24 is disposed below the silencer 6.

[0022] Furthermore, at least one of the burner 2 and the primary heat exchange section 5 is fixed to the inside of the back panel 1b to support the rear side, and therefore the silencer support member 24 is positioned on the front side of the silencer 6 to support the front side.

[0023] One end of the silencer support member 24 is fixed to the front side of the silencer 6 using a fixture 28, and the other end is fixed to the inside of the bottom plate 1d using a fixture 28.

[0024] The silencer support member 24 has a flange portion 25 in which a hole is drilled from the front plate 1a of the housing 1 toward the back plate 1b and the edge of the hole is processed to be cylindrically extended, and the upper side of the flange portion 25 has a sound absorbing material holding portion 26 with a wide surface.

[0025] By performing flange processing on the silencer support member 24 in this way, the strength can be increased.

[0026] Reference numeral 27 denotes a sound absorbing material made of glass fiber, rock wool, or the like, and is disposed in front of the silencer 6.

[0027] In this way, in a wall-mounted oil water heater, by absorbing the vibrations that occur on the front side of the silencer 6, the vibrations that occur when the combustion gas generated by the burner 2 is discharged can be reduced, and noise caused by the vibrations can be suppressed.

[0028] Furthermore, by using the silencer support member 24 to press the sound absorbing material 27 against the silencer 6, it is possible to further reduce vibration of the silencer 6, making it easier to absorb noise caused by vibration and suppressing the generation of noise.

[0029] Furthermore, by holding the sound absorbing material 27 with the sound absorbing material holding part 26, it is possible to prevent the sound absorbing material 27 from moving and becoming displaced due to the generated vibrations, and it is possible to reliably absorb the vibrations of the silencer 6.

[0030] Furthermore, the horizontal and vertical vibrations of the silencer 6 can be reduced by the silencer support member 24, which is fixed at one end and the other end, and the front-to-back vibrations can be reduced by the sound-absorbing material 27, thereby suppressing noise caused by vibrations.

[0031] Preferably, the surface above the flange portion 25 of the silencer support member 24 is wider than the surface below the flange portion 25, making it easier to arrange the sound-absorbing material 27, and by bringing a wide area on the front side of the silencer 6 into contact with the sound-absorbing material 27, the area for absorbing vibrations can be increased.

[0032] Furthermore, since the sound absorbing material 27 has heat resistance, the sound absorbing material 27 blocks the heat radiation generated from the silencer 6 .

[0033] In this way, the sound absorbing material 27 is in contact with the silencer 6 to reduce vibration, so that heat is transmitted to the sound absorbing material 27, which prevents heat from being dissipated from the silencer support member 24 and prevents a decrease in thermal efficiency.

[0034] The present invention is not limited to the embodiments, and modifications may be made within the scope of not changing the gist of the invention. For example, in the embodiments, the sound-absorbing material 27 is placed on the sound-absorbing material holding portion 26 and pressed against the silencer, but the tip of the sound-absorbing material holding portion 26 may be raised to have a holding structure that reliably prevents the sound-absorbing material 27 from shifting position.

[0035] Furthermore, the primary heat exchange section 5 and the back panel 1b are fixed using a heat exchanger fixing device 5a, and the silencer 6 is fixed using a silencer hook 6a, but each may be fixed using a fixing device, and since this is a wall-mounted oil-fired water heater, it is preferable to fix it to the back panel 1b. [Explanation of symbols]

[0036] 1 chassis 1a Front plate 1b Back plate 1c Top plate 1d bottom plate 1e Left and right side plates 1F Wall fixing bracket 2 Burner 4 Combustion chamber 5 Primary heat exchange section 5a Heat exchange fixture 6 silencer 6a Silencer hook 7 Secondary heat exchange section 24 Silencer support member 25 flange 26 Sound absorbing material holding part 27 Sound-absorbing material 28 Fixtures

Claims

1. Inside the housing, which is made up of a front panel, a rear panel, a top panel, a bottom panel, and left and right panels, a pressure atomizing burner for supplying combustion gas into the combustion chamber; a heat exchanger located below the burner, which recovers sensible heat from combustion gas generated by combustion of the burner and heats water flowing through a heat receiving pipe; a silencer located below the heat exchanger to reduce noise caused by the discharge of combustion gas generated by the burner, a wall fixing bracket for attaching the housing to a wall; At least one of the burner and the heat exchanger is fixed to the inside of the back panel, A wall-mounted oil hot water heater characterized in that a sound absorbing material is placed in front of the silencer.

2. a silencer support member is provided below the silencer; 2. The wall-mounted oil hot water heater according to claim 1, wherein one end of the silencer support member is fixed to the front side of the silencer and the other end is fixed to the inside of the bottom plate.

3. The sound-absorbing material has heat-shielding properties, 3. The wall-mounted oil hot water heater according to claim 2, wherein the silencer support member is configured to hold the sound absorbing material.

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