Abstract: A hot water appliance includes a housing defining an inner space; a heat source arranged in the inner space of the housing and comprising at least one burner; a flue gas discharge arranged in the inner space of the housing and configured to discharge combustion gases of the at least one burner therethrough; and a heat exchanger arranged in the inner space of the housing and associated with the flue gas discharge. The combustion gases of the at least one burner form a first heat exchanging fluid of the heat exchanger associated with the flue gas discharge. A flue gas discharge for a hot water appliance and a method for heating a fluid are also described.

Abstract: The present invention relates to a centrifugal fan comprising a fan housing with a radial outlet opening arranged in a radial peripheral wall thereof, a rotor arranged rotatably in the fan housing and provided close to an axial rotation axis thereof with a rotor inflow opening, wherein the fan housing is provided close to the rotation axis of the rotor with an axial inlet opening, and a tube part which extends in the fan housing from the radial outlet opening arranged in the radial peripheral wall and inward along the radial peripheral wall. The invention further relates to a heating device comprising a burner with a fuel mixture infeed opening, a centrifugal fan according to the invention, and wherein a fluid connection is provided between the fuel mixture infeed opening of the burner and the outlet opening of the centrifugal fan.

Abstract: A device for mixing combustible gas and combustion air, hot water installation, and corresponding thermal mass flow sensor and method. The device includes an air line, a gas line with a control valve, a first measuring line connecting the air and gas lines, and a second measuring line connecting the first measuring line to the gas and/or air line, forming a three-way intersection. A thermal mass flow sensor includes first and second temperature sensors in the first measuring line, positioned respectively in a gas flow between the three-way intersection and the air line and in a gas flow between the three-way intersection and the gas line. A controller controls the control valve based on a difference, measured by the flow sensor, between mass flow rate of gas between the three-way intersection and the air line and mass flow rate of gas between the three-way intersection and the gas line.

Abstract: The invention relates to a method and a device for determining in a heating appliance whether ignition of the mixture of fluid fuel and air has taken place, comprising the following steps of: applying an electrical ignition signal to a measuring circuit; filtering a combustion signal from the ignition signal; comparing the detected combustion signal to a predetermined pattern; and establishing that the anticipated combustion signal took place during a predetermined period of time.

Abstract: A domestic appliance has an operating element, the operating element comprising a carrier, at least one pressure sensor configured for detection of an operation of the operating element, and at least one light source. A control is configured to switch the light source on or off subject to a sensor signal coming from the pressure sensor. At least one light conductor is arranged close to the light source and is configured to conduct light from the light source to at least a side of the light conductor remote from the carrier. Provided on or close to the side of the light conductor remote from the carrier is a screen comprising at least one opaque part and at least one translucent part, which together form a symbol.

Abstract: The invention relates to a heat exchanger, comprising a hollow central body which is received in a housing and defines an inner channel for a first medium, wherein a space surrounding the central body in the housing defines at least one outer channel for a second medium, wherein the central body has on either side parts which protrude from a main plane thereof and are connected to mutually opposite parts of the housing and which bound the outer channel such that the outer channel has a meandering form substantially parallel to the main plane of the central body. The invention further relates to a method for forming such a heat exchanger, and to a method for use thereof.

Abstract: A flow controller for a hot water appliance includes a housing having at least three channels, a branching chamber arranged in the housing and in which the at least three channels debouch, and in which a shut-off valve is arranged with which at least two of the three channels can be closed and left clear. The shut-off valve has an adjustment range with a first extreme position in which a first channel and a second channel of the at least three channels are in flow connection with each other via the branching chamber and in which the first channel and a third channel of the at least three channels are substantially closed off from each other. A hot water appliance can include such a flow controller.

Abstract: A hot water appliance includes a housing defining an inner space; a heat source arranged in the inner space of the housing and comprising at least one burner; a flue gas discharge arranged in the inner space of the housing and configured to discharge combustion gases of the at least one burner therethrough; and a heat exchanger arranged in the inner space of the housing and associated with the flue gas discharge. The combustion gases of the at least one burner form a first heat exchanging fluid of the heat exchanger associated with the flue gas discharge. A flue gas discharge for a hot water appliance and a method for heating a fluid are also described.

Abstract: A domestic appliance has an operating element, the operating element comprising a carrier, at least one pressure sensor configured for detection of an operation of the operating element, and at least one light source. A control is configured to switch the light source on or off subject to a sensor signal coming from the pressure sensor. At least one light conductor is arranged close to the light source and is configured to conduct light from the light source to at least a side of the light conductor remote from the carrier. Provided on or close to the side of the light conductor remote from the carrier is a screen comprising at least one opaque part and at least one translucent part, which together form a symbol.

Abstract: The present invention relates to a centrifugal fan comprising a fan housing with a radial outlet opening arranged in a radial peripheral wall thereof, a rotor arranged rotatably in the fan housing and provided close to an axial rotation axis thereof with a rotor inflow opening, wherein the fan housing is provided close to the rotation axis of the rotor with an axial inlet opening, and a tube part which extends in the fan housing from the radial outlet opening arranged in the radial peripheral wall and inward along the radial peripheral wall. The invention further relates to a heating device comprising a burner with a fuel mixture infeed opening, a centrifugal fan according to the invention, and wherein a fluid connection is provided between the fuel mixture infeed opening of the burner and the outlet opening of the centrifugal fan.

Abstract: A device for mixing combustible gas and combustion air, hot water installation, and corresponding thermal mass flow sensor and method. The device includes an air line, a gas line with a control valve, a first measuring line connecting the air and gas lines, and a second measuring line connecting the first measuring line to the gas and/or air line, forming a three-way intersection. A thermal mass flow sensor includes first and second temperature sensors in the first measuring line, positioned respectively in a gas flow between the three-way intersection and the air line and in a gas flow between the three-way intersection and the gas line. A controller controls the control valve based on a difference, measured by the flow sensor, between mass flow rate of gas between the three-way intersection and the air line and mass flow rate of gas between the three-way intersection and the gas line.

Abstract: A flow controller for a hot water appliance includes a housing having at least three channels, a branching chamber arranged in the housing and in which the at least three channels debouch, and in which a shut-off valve is arranged with which at least two of the three channels can be closed and left clear. The shut-off valve has an adjustment range with a first extreme position in which a first channel and a second channel of the at least three channels are in flow connection with each other via the branching chamber and in which the first channel and a third channel of the at least three channels are substantially closed off from each other. A hot water appliance can include such a flow controller.

Abstract: The invention relates to a method and a device for determining in a heating appliance whether ignition of the mixture of fluid fuel and air has taken place, comprising the following steps of: applying an electrical ignition signal to a measuring circuit; filtering a combustion signal from the ignition signal; comparing the detected combustion signal to a predetermined pattern; and establishing that the anticipated combustion signal took place during a predetermined period of time.

Abstract: The invention relates to a heat exchanger, comprising a hollow central body which is received in a housing and defines an inner channel for a first medium, wherein a space surrounding the central body in the housing defines at least one outer channel for a second medium, wherein the central body has on either side parts which protrude from a main plane thereof and are connected to mutually opposite parts of the housing and which bound the outer channel such that the outer channel has a meandering form substantially parallel to the main plane of the central body. The invention further relates to a method for forming such a heat exchanger, and to a method for use thereof.

Abstract: The present invention relates to a heat exchanger, comprising: a first conduit circuit for guiding a first fluid; a second conduit circuit for guiding a second fluid; wherein the first conduit circuit and the second conduit circuit are both arranged in a heat-conducting material which is provided on a first side with fins; wherein the first conduit circuit substantially defines a plane arranged substantially parallel to and close to the first side of the heat-conducting material; wherein the second conduit circuit is arranged substantially along the first conduit circuit; wherein the second conduit circuit extends substantially along only a limited part of the plane defined by the first conduit circuit. The invention further relates to a hot water device and hot water system provided with such a heat exchanger, and to a method for application thereof.

Abstract: The invention relates to a mixture supply system which is adapted for mounting in a hot water appliance and which is adapted to supply a combustible mixture to a burner of the hot water appliance, comprising a fuel feed for a fluid fuel, an oxidizer feed for a fluid oxidizer, a mixing chamber for mixing the fuel and the oxidizer in order to form the combustible mixture, a discharge for discharging the combustible mixture from the mixing chamber and a fan for urging the fuel and oxidizer from the respective feed to the mixing chamber, and urging the mixture therefrom to the discharge, wherein the fan is adapted to act directly on both the fuel and the oxidizer. The fan does not so much make use of an airflow with gas drawn in by a venturi, but gas is supplied separately to the fan.

Abstract: A device for heating a flowing medium (e.g., water), wherein the device comprises a heating module and a heat exchanger enclosed by an insulating material comprising a vacuum-packed core material. The heating module and the heat exchanger may further be received in a housing having a number of walls, wherein the vacuum-packed core material is arranged between one of the walls and the heating module and/or the heat exchanger.

Abstract: A heat exchanger is manufactured from a single piece of heat-conducting material and comprises fins for guiding a fluid and for transferring heat between the fluid and the heat exchanger, wherein between the fins are provided transverse fins which extend in a direction substantially transversely of the fins over a distance which is less than the distance between the fins and in a direction substantially transversely of the flow direction of the fluid, wherein the transverse fins are arranged alternately close to or on mutually adjacent fins in order to cause a fluid flowing between the fins to follow a meandering path between the fins, wherein the lateral direction lies substantially perpendicularly of the fins.