Danfoss A/s

Leo Bram

Claus Thybo

Jens Pawlik

Lars Finn Sloth Larsen

Kurt Harck

Sigurd Larsen

Torben Funder-Kristensen

Laurits B Rasmussen

Jakob Spangberg

Asbjoern Leth Vonsild

Toke Rumohr Christiansen

Thomas Tiedemann

Ejner Kobberoe

Helge Vandel Jensen

Jesper Hojland Hoyer

Ejner Kobberø Andersen

Bent Jørgensen

Ejner KobberØ

An expansion valve () comprising an inlet opening () and a distributor () being arranged to distribute fluid medium received from the inlet opening to at least two parallel flow paths (). At least two outlet openings () are adapted to deliver fluid in an at least partially gaseous state, and each outlet opening is fluidly connected to one of the parallel flow paths. A first valve part () and a second valve part () are arranged movably relative to each other in such a manner that the mutual position of the first valve part and the second valve part determines the opening degree of the expansion valve. Since the distributor () forms part of the expansion valve, it distributes the fluid medium to the parallel flow paths prior to or during expansion of the fluid medium, i.e. while the fluid medium is in a substantially liquid state. This makes it easier to control the distribution of fluid medium to the parallel flow paths in a uniform manner.

Expansion valve with a distributor

The present invention relates to a method and a system to reduce losses of energy due to ripples, especially at the power grid, the ripples being short term power shortages or excess power. The method is based on the idea of shutting off energy consuming devices during a period of power shortage, if their operation is not necessary, and optionally to turn on such energy consuming devices during periods of excess power, if energy may be stored in them, especially when energy may be stored as some physical parameter or variable, being a part of the operation of the energy consuming devices, such as the temperature of a freezer.

Power saving system and method for a refrigeration system, providing for short term response to reduce ripples on a power grid

A method for operating a vapor compression system is disclosed. The vapor compression system comprises a compressor, a condenser, at least one expansion device, an evaporator, said evaporator comprising at least two evaporator paths arranged fluidly in parallel, and a distribution device arranged to distribute refrigerant among the evaporator paths. The method comprises the steps of obtaining at least two predefined distribution keys, each distribution key defining a distribution of available refrigerant among the evaporator paths, detecting one or more operational settings of the vapor compression system, selecting one of the at least two predefined distribution keys, based on said detected operational setting(s), and distributing refrigerant among the evaporator paths in accordance with the selected predefined distribution key.

Method for operating a vapour compression system

A superheat sensor () for sensing superheat of a fluid flowing in a flow channel () is disclosed. The sensor () comprises a flexible wall defining an interface between an inner cavity () having a charge fluid () arranged therein and the flow channel (). The flexible wall is arranged in the flow channel () in thermal contact with the fluid flowing therein, and the flexible wall is adapted to conduct heat between the flow channel () and the inner cavity (). Thereby the temperature of the charge fluid () adapts to the temperature of the fluid flowing in the flow channel (), and the pressure in the inner cavity () is determined by this temperature. A first wall part () and a second wall part () are arranged at a variable distance from each other, said distance being defined by a differential pressure between the pressure of the charge fluid () and the pressure of the fluid flowing in the flow channel (), i.e. depending on the pressure and the temperature of the fluid flowing in the flow channel (), and thereby the superheat of the fluid. A distance sensor, e.g. comprising a permanent magnet () and a Hall sensor (), measures the distance between the wall parts, and the superheat is calculated from the measured distance. The sensor () is suitable for use in a refrigeration system. The sensor () is mechanically simple and capable of determining the superheat by measuring only one parameter.

Superheat sensor

A valve assembly () comprising an inlet opening, a distributor and an outlet part comprising at least two outlet openings. The distributor comprises an inlet part () fluidly connected to the inlet opening, and is arranged to distribute fluid medium received from the inlet opening to at least two parallel flow paths, preferably of a heat exchanger (). The valve assembly () further comprises a first valve part and a second valve part arranged movable relative to each other in such a manner that the mutual position of the valve parts determines the fluid flow from the inlet opening to each of the outlet openings of the outlet part. Finally, the valve assembly () comprises a header () forming an integral part of the valve assembly (). The header () is arranged to form an interface towards a heat exchanger () comprising at least two flow paths, and it provides fluid connections in such a manner that each of the outlet openings () is fluidly connected to a flow path of a heat exchanger () connected to the header (). The valve assembly () improves the distribution of fluid medium between the flow channels of the heat exchanger ().

Valve assembly with an integrated header

Super heat sensor

Ecoflow valve

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Augustenborg, Denmark

Leo Bram