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Rinnai Corporation patents


Recent patent applications related to Rinnai Corporation. Rinnai Corporation is listed as an Agent/Assignee. Note: Rinnai Corporation may have other listings under different names/spellings. We're not affiliated with Rinnai Corporation, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "R" | Rinnai Corporation-related inventors


Water heater

A water heater includes a vessel (20) provided with a burner (3) having a downward combustion surface, a fan casing (10) accommodating a fan (10a) for supplying a mixture gas of primary combustion air and fuel gas to the burner, an annular packing connecting a first connection end surface at a downstream end of a first passage forming a downstream-side passage of the fan casing with a second connection end surface at an upstream end of a second passage forming an upstream-side passage of the vessel in airtight state, and a check valve (5) disposed near the upstream end in the second passage (2).. . ... Rinnai Corporation

Combustion appratus

A combustion apparatus (1) has a burner (11) configured to burn combustion gas, a heat exchanger (12) disposed below the burner (11), and a combustion fan (13) configured to supply air for combustion, wherein the combustion apparatus performs post-purge operation in which the combustion fan (13) is activated for a predetermined period of time after combustion operation of the burner (11) stops, and intermittent blower operation in which activation and deactivation of the combustion fan (13) is repeated a plurality of times at predetermined intervals after the post-purge operation ends.. . ... Rinnai Corporation

Heat source device

Provided is a heat source device including a control unit (51) which, in response to a predetermined request for heating, sets switching valve (21) to first circulation mode to communicate port (21a) and (21c), whereas to cut off communication between port (21b) and (21c), and performs heating operation by actuating burner (11) and circulation pump (22). In response to a predetermined request for hot water supply, the control unit (51) sets the switching valve (21) to second circulation mode to communicate ports (21b) and (21c), whereas to cut off communication between ports (21a) and (21c), and performs hot water supply operation, by actuating burner (11) and circulation pump (22). ... Rinnai Corporation

Heat exchanger and combustion device

A heat exchanger including a heat transfer fin (1) having a heat-transfer-tube insertion hole (10) through which a heat transfer tube (40) is inserted, and a brazing material holding portion (100) provided above the heat-transfer-tube insertion hole (10) to hold a brazing material (4), wherein when the heat transfer tube (40) is inserted through the heat-transfer-tube insertion hole (10), left and right non-contact portions (15), (16) where a circumferential edge of the heat-transfer-tube insertion hole (10) and an outer circumferential surface of the heat transfer tube (40) are not in contact with each other are separately formed on an upper circumferential edge of the heat-transfer-tube insertion hole (10), and a brazing material guiding portion (100) extending toward the outer circumferential surface of the heat transfer tube (40) is formed between the left and right non-contact portions (15), (16).. . ... Rinnai Corporation

Heat exchanger and heat source device

A heat exchanger for hot water supply (21) is comprised of: a first heat exchanging unit (21) a that heats the water, which is supplied from a second communication section x1 to the hollow portions of hollow plates p1 to p5 and reaches a first communication section y, by a combustion exhaust gas that circulates through the gaps among the hollow plates p1 to p5; and a second heat exchanging unit (21b) that heats the water, which is supplied from the first communication section y to the hollow portions of the hollow plates p6 to p8 below the hollow plates p1 to p5 and reaches a third communication section x2, by a heat medium that circulates through the gaps among the hollow plates p6 to p8.. . ... Rinnai Corporation

Attachment structure for water heater

Provided is an attachment structure for a water heater capable of easily and securely attaching the water heater to a wall surface without performing strict alignment, and capable of fine adjustment of an attachment position of the water heater even after the attachment. The attachment structure for the water heater includes a first metal fitting (1) having a wall surface attachment portion (11) configured to be attached to a wall surface (w), and a second metal fitting (2) having an instrument attachment portion (23) configured to be attached to a back surface of the instrument body (3). ... Rinnai Corporation

Heat exchanger and water heater

A heat exchanger having a drainage member (1) mounted on an open end (322) of a heat-transfer tube (32), wherein the drainage member (1) contains a flow guide portion (11) including an insertion portion (11a) configured to be inserted into the heat-transfer tube (32) from the open end (322), and a projecting portion (11b) projecting toward an outside of the heat-transfer tube (32) from the open end (322) and extending downward.. . ... Rinnai Corporation

Indoor installation type combustion apparatus

In an indoor installation type combustion apparatus in which an upper surface of the exterior case has formed therein: a cylindrical exhaust connection port which is in communication with an exhaust duct and which is connectable to an exhaust pipe; a first cylindrical air supply connection port which is connectable to an air supply pipe of double-pipe system containing therein the exhaust pipe and which encloses the exhaust connection port; and a second cylindrical air supply connection port which is connectable to an air supply pipe of twin-pipe system which is separate from, and independent of, the exhaust pipe, a low-cost apparatus is provided in which the air flowing in from whichever the first and the second air supply connection ports will be treated by one and the same supply-air filter. An air supply box which is in communication with both the first and the second air supply connection ports is disposed. ... Rinnai Corporation

Heat medium circulation device

Provided is a heat medium circulation device with a simple structure, capable of reducing power consumption in performing an anti-freezing treatment. A first heat medium circuit 2 and a second heat medium circuit 3 are connected via a connector 5. ... Rinnai Corporation

Combustion apparatus

The present invention provides a combustion apparatus capable of obtaining a smaller heating value than usual and capable of reducing the amount of a mixed gas without causing a change in the mixture ratio of air and a fuel gas. A shutter member 4 is provided, which narrows the flow passage of a gate section 25 of a duct 23 when a mixed gas, which is produced by mixing air and a fuel gas, is forcibly sent from the duct 23 to a distribution chamber 12 by a fan 2.. ... Rinnai Corporation

Turbulence member and heat exchanger using same, and water heater

. . . . . . A turbulence member is made of a flat plate member configured to be inserted into a heat-transfer tube having a substantially elliptical cross-sectional shape. The flat plate member is a generate turbulence in a fluid flowing inside the heat-transfer tube by a plurality of projected pieces projected on both front and back surfaces. ... Rinnai Corporation

Combustion apparatus

A combustion apparatus includes a burner (11), a heat exchanger (12) accommodated in a casing (20), an exhaust passage (22b) provided to one side surface side of the casing (20), and an exhaust resistance member (5) having a plurality of ventilation ports (50) through which combustion exhaust gas passes, wherein at least one part of the ventilation ports (50) has an elongated hole shape extending in the flow direction of the combustion exhaust gas from beneath the casing (20) to the exhaust passage (22b).. . ... Rinnai Corporation

Turbulence generator

A turbulence generator includes a flat plate member (1) having a plurality of through holes (10a), (10b), and pairs of projecting pieces (11, 12) and (13, 14) projecting respectively from upstream-side edges and downstream-side edges of the through holes (10a), (10b), wherein the pairs of projecting pieces (11, 12) and (13, 14) project alternately to front and back surface sides of the flat plate member (1).. . ... Rinnai Corporation

Premixing apparatus

. . A premixing apparatus has: a butterfly valve and a changeover valve for changing over, between high and low, a ventilation resistance in an air supply passage and in a gas supply passage, respectively; and an interlocking mechanism to open or close the changeover valve in interlocking with the opening or closing of the butterfly valve. In either of the small-capacity state in which the ventilation resistance in the air supply passage and in the gas supply passage is made high to attain a small-capacity state or in a large-capacity state to attain a large-capacity state, adjustments are arranged to be made to make appropriate the excess air ratio of the air-fuel mixture. ... Rinnai Corporation

09/28/17 / #20170276345

Premixing apparatus

A premixing apparatus in which a downstream end of a gas supply passage having interposed therein a flow control valve is connected to a gas suction section disposed in an air supply passage on an upstream side of a fan. The premixing apparatus has: a butterfly valve as an air resistance changeover device for changing over, between high and low, a ventilation resistance in that section of the air supply passage which is on the upstream side of the gas suction section; and a gas resistance changeover device for changing over, between high and low, a ventilation resistance in that section of the gas supply passage which is on the downstream side of the flow control valve. ... Rinnai Corporation

08/17/17 / #20170234578

Combustion type water heater

The present description discloses a combustion type water heater that heats water by burning fuel. The combustion type water heater includes: a burner that generates combustion gas by burning the fuel; a heat exchanger that exchanges heat between the water passing through on an inside of the heat exchanger and the combustion gas flowing on an outside of the heat exchanger, an exhaust pipe that discharges the combustion gas after the heat exchange in the heat exchanger as exhaust gas; an exhaust gas temperature detector that detects a temperature of the exhaust gas flowing in the exhaust pipe as an exhaust gas temperature; a clog degree detector that detects a degree of clog in the exhaust pipe; and a scale buildup determiner that determines whether or not scale has built up inside the heat exchanger based on the exhaust gas temperature and the degree of clog in the exhaust pipe.. ... Rinnai Corporation

02/16/17 / #20170045262

Combustion apparatus

The present application discloses a combustion apparatus including: an air supply/exhaust port formed such that an air supply passage surrounds the outside of an exhaust passage; and an air supply port in which an air supply passage is formed. This combustion apparatus is configured such that in a case where this apparatus is installed in the double-pipe system, the air supply passage of the air supply port is closed, whereas in a case where it is installed in the separate-pipe system, the air supply passage of the air supply/exhaust port is closed. ... Rinnai Corporation








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