Abstract

Impeller for a radial fan, the impeller comprising a front side, a rear side and a peripheral edge, a hub element, an annular covering disc positioned on the front side, an intake opening formed on the front side, a support disc positioned on the rear side, blades extending substantially radially from the hub element towards the peripheral edge, and outflow openings formed in the region of the peripheral edge. A first outer diameter of a radially outer edge of the annular covering disc is greater than a second outer diameter of a radially outer edge of the support disc. Openings are formed in the annular covering disc, wherein the openings are positioned between the radially outer edge of the annular covering disc having the first outer diameter and a radially inner edge of the annular covering disc having a first inside diameter.

IPC Classes  ?

• F04D 29/28 - Rotors specially adapted for elastic fluids for centrifugal or helico-centrifugal pumps
• F04D 29/42 - CasingsConnections for working fluid for radial or helico-centrifugal pumps
• F23D 14/28 - Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid in association with a gaseous fuel source, e.g. acetylene generator, or a container for liquefied gas
• F23D 14/70 - Baffles or like flow-disturbing devices

Abstract

A gas burner appliance (10) comprises a gas burner (11) for combusting a gas/air mixture. The gas burner appliance (10) further comprises a primary heat ex- changer (13) for heating service water (14) by the combustion of said gas/air mixture, and a secondary heat exchanger (18) for heating domestic water (19) by the heated service water (14). In a first or winter operation mode the heated service water (14) is provided to a heating system (15) and/or to the secondary heat exchanger (18). In a second or summer operation mode the heated service water (14) is only provided to the secondary heat exchanger (18). During burner-on phases the gas/air mixture having a defined mixing ratio of gas and air is provided to the gas burner (11). During burner-on phases the defined mixing ratio of gas and air of the gas/air mixture can be controlled and/or calibrated on basis of a signal provided by an electrical or electronic sensor (25). In the second or summer operation mode the calibration of the defined mixing ratio of gas and air is initiated in such a way that a value being representative of a number of burner starts and/or of an operating time and a temperature being representative of the gas burner temperature are monitored. If the value being representative of the number of gas burner starts and/or of the operating time reaches or crosses a first threshold, and if further the temperature being representative of the gas burner temperature reaches or falls below or is below a second threshold, then the gas burner (11) is started without presence of a heat demand to calibrate the defined mixing ratio of gas and air of the gas/air mixture.

IPC Classes  ?

• F23N 5/24 - Preventing development of abnormal or undesired conditions, i.e. safety arrangements
• F23N 1/02 - Regulating fuel supply conjointly with air supply
• F23N 5/02 - Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
• F23N 5/12 - Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
• F24D 3/08 - Hot-water central heating systems in combination with systems for domestic hot-water supply

Abstract

A gas burner controller adapter for use in adapting a gas burner control device, which is configured to be connected to a flame ionization electrode and a separate ignition electrode, to operate in a gas burner that only includes a single electrode serving as both the flame ionization electrode and the ignition electrode.

IPC Classes  ?

• F23D 14/60 - Devices for simultaneous control of gas and combustion air
• F23D 17/00 - Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel
• F23Q 13/02 - Ignition not otherwise provided for using gas burners, e.g. gas pokers
• F23N 5/12 - Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
• F24C 3/12 - Arrangement or mounting of control or safety devices

Abstract

A pressure independent control valve (10) for controlling the flow of a liquid medium includes a valve body having a side wall defining a conduit that extends from an inlet to an outlet. The side wall of the valve body include a first side opening (23) and a second side opening (24) extending into the conduit. A first insert element (21) is placed into the first side opening (23) and a second insert element (22) is placed into the second side opening (24). At least part of a pressure control device (18) is accommodated by said first insert element (21), and at least part of a flow rate adjustment device (19) is accommodated by said second insert element (22).

IPC Classes  ?

• F16K 7/17 - Diaphragm cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat the diaphragm being actuated by fluid pressure
• G05D 7/01 - Control of flow without auxiliary power
• G05D 16/08 - Control of liquid pressure
• F16K 31/126 - Operating meansReleasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like

Abstract

A pressure reducer for a system separator includes a seal element accommodated in a groove, which is subject on a first side to a pressure prevailing at an inlet-side connection stub of the system separator and on a second side to a pressure prevailing in an inlet chamber of the system separator. At least one recess is introduced into a wall delimiting the groove on the first side, into which recess the seal element partially enters, canceling out its sealing effect, when the pressure prevailing at the inlet-side connection stub falls below the pressure prevailing in the inlet chamber.

IPC Classes  ?

• E03B 7/07 - Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
• E03C 1/10 - Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
• E03C 1/02 - Plumbing installations for fresh water
• F16K 15/06 - Check valves with guided rigid valve members with guided stems

Abstract

A method for determining an change in an operating condition of a gas burner appliance. In some instances, a calibration of a gas/air mixture may be performed when the combustion quality of the gas burner appliance diminishes. This may be accomplished by adjusting a throttle position of a throttle valve that throttles the gas to the gas burner appliance. After calibration has been performed, a throttle position of the throttle valve is determined, and based on the throttle position determined after calibration, a change of an operating condition of the gas burner appliance is detectable.

IPC Classes  ?

• F23N 1/02 - Regulating fuel supply conjointly with air supply
• F23N 5/12 - Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
• F23D 14/22 - Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other

Abstract

Fluid flow measuring device for measuring a fluid flow, comprising a rotatable, magnetic element, wherein the rotatable, magnetic element is positioned in the fluid flow, wherein the rotation of the rotatable, magnetic element depends from the fluid flow, wherein the rotation of the rotatable, magnetic element generates a magnetic field; further comprising at least one sensing coil pair having a first sensing coil and a second sensing coil, wherein the respective sensing coils of each sensing coil pair are arranged in such a way that the magnetic field generated by the fluid flow dependent rotation of the rotatable element has a first polarity and a first phase in the region of the respective first sensing coil and a second polarity and a second phase in the region of the respective second sensing coil, wherein at least said polarities differ from each other.

IPC Classes  ?

• G01F 1/115 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission with magnetic or electromagnetic coupling to the indicating device
• G01F 1/58 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
• G01F 1/075 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential admission with magnetic or electromagnetic coupling to the indicating device

Abstract

In a modulating gas burner, the mixing ratio of a gas/air mixture is controlled over a modulation range of the gas burner by a pneumatic controller. During burner on phases, the combustion quality is monitored via a combustion quality sensor. The combustion quality is used to detect tolerances of the pneumatic controller and/or a potentially changing behavior of the pneumatic controller by checking if the combustion quality is inside or outside a defined combustion quality range. When the combustion quality is inside the defined combustion quality range, the mixing ratio of gas and air of the gas/air mixture is not changed. When the combustion quality is outside the defined combustion quality range, the mixing ratio of gas and air of the gas/air mixture is changed by adjusting a gas throttle to compensate for tolerances of the pneumatic controller and/or for a potentially changing behavior of the pneumatic controller.

IPC Classes  ?

• F23N 5/00 - Systems for controlling combustion
• F23N 1/00 - Regulating fuel supply
• F23N 1/02 - Regulating fuel supply conjointly with air supply
• F23N 5/12 - Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods

Abstract

A method of communication between devices of a building management system (1) over a token ring network, comprising the steps of: a first device receiving (101) the token (2) for the token ring network; the first device, in response to receiving the token (2), broadcasting (105) a request message over the network; a second device, in response to receiving the request message over the network, sending a command message to a receiving device over the network; and the first device passing (107) the token (2) for the token ring network to a subsequent device on the network.

IPC Classes  ?

• H04L 12/18 - Arrangements for providing special services to substations for broadcast or conference
• H04L 12/417 - Bus networks with decentralised control with deterministic access, e.g. token passing
• H04L 12/433 - Loop networks with decentralised control with asynchronous transmission, e.g. token ring, register insertion

Abstract

A regulating device may include a housing that defines an inlet chamber and an outlet chamber, with a flow restriction seat between the inlet chamber and the outlet chamber. A flow restriction valve is movable relative to the flow restriction seat to adjust the flow between the inlet chamber and the outlet chamber of the regulating device. A servo valve having a servo chamber may be used to adjust the position of the flow restriction valve. The servo chamber may be fluidly coupled to the inlet chamber though a fixed flow restriction and to the outlet chamber though an adjustable flow restriction. A stepper motor may be used to adjust the servo valve to adjust the adjustable flow restriction between the servo chamber and the outlet chamber. This causes a change of the servo pressure, which moves the flow restriction valve and adjusts the flow of the regulating device.

IPC Classes  ?

• F16K 31/124 - Operating meansReleasing devices actuated by fluid the fluid acting on a piston servo actuated
• F16K 31/04 - Operating meansReleasing devices electricOperating meansReleasing devices magnetic using a motor
• F16K 7/12 - Diaphragm cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage with flat, dished, or bowl-shaped diaphragm
• F23N 1/00 - Regulating fuel supply

Abstract

Servo gas system (11) for a gas burner (10), namely for controlling a pressure regulation valve (20) positioned in a gas duct (18) of the gas burner, thereby controlling a gas pressure within the gas duct (18) being present downstream of the pressure regulation valve (20) and thereby controlling a pressure difference between a pressure in a burner chamber (12) of the gas burner and said gas pressure within the gas duct (18), the servo gas system (11) comprising a static servo gas flow branch (28) and a dynamic servo gas flow branch (29) being connected in parallel, and a flow sensing element (30) being connected between the static servo gas flow branch (28) and the dynamic servo gas flow branch (29) and providing a signal used to control the pressure regulation valve (20) by an electric actuator (41).

IPC Classes  ?

• F16K 31/02 - Operating meansReleasing devices electricOperating meansReleasing devices magnetic
• G05D 16/20 - Control of fluid pressure characterised by the use of electric means
• F23N 1/02 - Regulating fuel supply conjointly with air supply
• F23N 1/00 - Regulating fuel supply
• F23N 5/18 - Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel

Abstract

A device (10) for handling a liquid medium, in particular water, having a housing (11), wherein the housing (11) defines an inlet chamber (12) for the liquid medium and an outlet chamber (13) for the liquid medium, said inlet chamber and outlet chamber being separated from one another or coupled to one another by a pressure reduction valve (14) in such a way that, when an outlet chamber pressure prevailing in the outlet chamber (13) is lower than a threshold value, the pressure reduction valve (14) is automatically opened in order to couple the inlet chamber (12) and outlet chamber (13), and in that, when the outlet chamber pressure prevailing in the outlet chamber (13) is higher than the threshold value, the pressure reduction valve (14) is automatically closed in order to separate the inlet chamber (12) and outlet chamber (13), wherein two return flow prevention valves (21, 22) are integrated in the inlet chamber (12) of the housing (11).

IPC Classes  ?

• F16K 15/06 - Check valves with guided rigid valve members with guided stems
• F16K 27/02 - Construction of housingsUse of materials therefor of lift valves
• E03B 7/07 - Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
• E03C 1/10 - Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
• F16K 15/18 - Check valves with actuating mechanismCombined check valves and actuated valves

Abstract

A building (1) and a building services module (3) arranged to provide a plurality of different building services such as heating and/or cooling for the building, ventilation, energy recovery, hot water, or thermal storage. The module (3) is accessible from outside the building (1) such that maintenance and/or inspection of the module (3) can be conducted without requiring access to the building (1).

IPC Classes  ?

• E04B 1/00 - Constructions in generalStructures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
• E04F 17/08 - Vertical ductsChannels, e.g. for drainage for receiving utility lines, e.g. cables, pipes

Abstract

The invention relates to a method for controlling and regulating the superheating temperature of a coolant in an evaporation device in the circuit of a plant system of a heat pump or cooling system, characterized in that an energy flow balance is formed for determining the target value for the controlled variable, wherein the virtual energy flow balance is formed such that the virtual energy flow balance is approximately proportional to the actual energy flow balance at all operating points of the heat pump or cooling system, in that a virtual heat output of the evaporation device is determined that is functionally dependent on the known parameters of superheating temperature, specific heat capacity of the coolant, and specific enthalpy in the saturated vapor condition, the stroke of the expansion valve, and a correction factor formed for each operating point of the expansion valve.

IPC Classes  ?

• F25B 41/06 - Flow restrictors, e.g. capillary tubes; Disposition thereof
• F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Abstract

The invention relates to an input/output unit (10) of a controls engineering system, in particular a process control system or a building management system, having a base module (11) comprising voltage connections (14), wherein at least one sensor providing a voltage signal as a measurement signal can be connected to the voltage connections of the base module. According to the invention, the input/output unit (10) comprises an adapter module (12) having current connections (15), wherein at least one sensor providing a current signal as a measurement signal can be connected to the current connections (15) of the adapter module (12), and wherein the current connections (15) of the adapter module (12) can be contacted by means of voltage connections (14) of the base module (11).

IPC Classes  ?

• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
• G05B 19/05 - Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts

Abstract

A control apparatus performs incremental approach of the set point of overheating of the evaporator of a refrigeration or heat pump system toward the MSS characteristic curve starting with characteristics stored in a storage means, the energy balance of the evaporator being permanently monitored. Instability is identified by evaluating the gradient of the temperature variation at the output of the evaporator. As a reaction to instability the respective set point is incrementally increased. As soon as the actual value for a predetermined time interval is within a tolerance, the system is detected as being stable again, wherein the new set point is stored in the characteristics.

IPC Classes  ?

• F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
• F25B 41/06 - Flow restrictors, e.g. capillary tubes; Disposition thereof

Abstract

The invention relates to a gas regulating unit with a valve basic body (11) which forms at least one gas inlet chamber and one gas outlet chamber, with a safety valve and with a main gas valve, wherein the safety valve and the main gas valve either open or close a gas flow from the gas inlet chamber into the gas outlet chamber. According to the invention, the valve basic body (11) comprises at least three parts, namely at least one plastic core (12), which defines the gas inlet chamber and the gas outlet chamber, and at least two metallic shells (13, 14), wherein a first metallic shell (13) encloses the plastic core (12) at least in sections on an upper side, and wherein a second metallic shell (14) encloses the plastic core (12) at least in sections on an underside, and wherein at least one diaphragm (15) is positioned between one of said metallic shells (14) and the plastic core (12), which at least one diaphragm (15) delimits in each case a drive chamber, in which a servopressure prevails, for the safety valve and/or the main gas valve.

IPC Classes  ?

• F16K 27/02 - Construction of housingsUse of materials therefor of lift valves

Abstract

The invention relates to a method for operating a gas burner, wherein the gas burner is supplied a gas/combustion air mixture for combustion in the gas burner, and wherein with the aid of an ionization sensor providing an ionization current preferably a flame of the gas burner is monitored. According to the invention, the ionization current is used to monitor as to whether stable or unstable combustion exists in the gas burner.

IPC Classes  ?

• F23N 5/12 - Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods

Abstract

The invention relates to a device for providing a gas/combustion air mixture for a gas burner, comprising a fan (11 ) for providing a combustion air flow, a gas control device for providing a gas flow and a mixing device (13) for mixing the combustion air flow and the gas flow, thus providing the gas/combustion air mixture. Said mixing device (13) and the fan (11 ) are connected together on one side, and on the other side, the mixing device and the gas control device are connected together. According to the invention, the mixing device (13) and the fan (11) are connected together in such a manner that a vibration absorber (15) is arranged between a connecting section (12) of the mixing device (13) and a connecting section (10) of the fan (11).

IPC Classes  ?

• F23D 14/62 - Mixing devicesMixing tubes
• F16L 37/107 - Bayonet-type couplings
• F16L 37/56 - Couplings of the quick-acting type for double-walled or multi-channel pipes

Abstract

The invention relates to a gas regulating unit (10), having at least one valve (11, 12), wherein the or each valve (11, 12) is assigned at least one coil (19, 20), in order to open the valve counter to a spring force which is provided by a spring element (17, 18) which closes the valve and counter to a pressure difference which prevails at the valve. According to the invention, the or each valve (11, 12) is assigned in each case at least two coils (19, 20), wherein, in order to open the respective valve (11, 12), at least two of the coils (19, 20) which are assigned to said valve (11, 12) are connected in parallel, and wherein, after the respective valve (11, 12) has been opened, the coils (19, 20) which were previously connected in parallel are connected in series.

IPC Classes  ?

• F16K 31/06 - Operating meansReleasing devices electricOperating meansReleasing devices magnetic using a magnet

Abstract

The invention relates to a controller having a first control device for receiving an input signal and for outputting an output signal, an output device in the form of an LED which responds to an output signal, an operating device for generating an input signal, and a second control device for receiving the input signal which has been generated using the operating device and for outputting an input signal and/or an output signal for the first control device on the basis of a property of the received input signal.

IPC Classes  ?

• G08C 13/02 - Arrangements for influencing the relationship between signals at input and output, e.g. differentiating, delaying to yield a signal which is a function of two or more signals, e.g. sum or product
• G08C 17/00 - Arrangements for transmitting signals characterised by the use of a wireless electrical link

Goods & Services

Building management remote performance monitoring systems composed of software and hardware.

Goods & Services

Building management remote performance monitoring systems composed of software and hardware.

Abstract

Method and bus interface for configuring a slave node on a differential two-wire bus with a receiving line and a transmitting line in relation to the polarity of the two-wire bus, wherein the following steps are to be taken for the slave node: Determination of a synchronization period of a master node in which no useful data are transmitted; Examination of a level on the receiving line of the two-wire bus during the synchronization period in comparison to a reference level of the receiving line for the synchronization period; and Inversion of the polarity of the two-wire bus on the slave node, if the level on the receiving line is unequal to the reference level.

IPC Classes  ?

• G06F 13/40 - Bus structure

Goods & Services

Digital control apparatus and instruments or installations; all for use in the supervision, checking, operation and control of lighting, heating, cooling, ventilating, and air conditioning; security and fire protection systems; all for buildings; sensors and computer software for use with all of the aforesaid goods; all included in Class 9.

Goods & Services

DIGITAL CONTROL APPARATUS AND INSTRUMENTS OR INSTALLATIONS, NAMELY ELECTRICAL CONTROLLERS FOR THE USE IN SUPERVISION, CHECKING, OPERATION OR CONTROL OF LIGHTING, HEATING, COOLING, VENTILATING AND AIR CONDITIONING FOR BUILDINGS AND COMPUTER SOFTWARE FOR OPERATING THE AFORESAID GOODS

Goods & Services

Free programmable Building Management Controller with direct Ethernet connectivity and integrated Internet server.

Goods & Services

Pressure controllers. Gas valves and gas valve assemblies; gas control devices, especially electrically or electronically controlled gas control devices having electrical temperature sensor, amplifier and solenoid valve; solenoid valves for gases; pressure or temperature dependent controlled gas control valves.

Goods & Services

Computer software; computer software which integrates, analyzes, collects, stores and transmits manufacturing and workflow data for use in connection with industrial processes.

Goods & Services

Digital control apparatus and instruments or installations; all for use in the supervision, checking, operation and control of lighting, heating, cooling, ventilating, and air conditioning; all for buildings; sensors and computer software for use with all of the aforesaid goods; all included in Class 9.

Goods & Services

Interrupteurs à pression manoeuvrés électriquement. Régulateurs de température, thermostats, valves magnétiques, interrupteurs à pression manoeuvrés électriquement, valves automatiques et commandées thermostatiquement.