A muffler comprises a housing enclosed to form a hollow cavity, the cavity comprises a cylindrical chamber and a rectangular parallelepiped chamber, wherein one of bottom surfaces of the cylindrical chamber is connected with a first surface of the rectangular parallelepiped chamber, the cylindrical chamber communicates with an interior of the rectangular parallelepiped chamber, and the cylindrical chamber is provided with an air inlet and an air outlet.

A dilution refrigerator is provided. The dilution refrigerator includes a plurality of thermalization plates configured to be cooled to a plurality of temperatures, and a first thermalization plate of the plurality of thermalization plates includes an integrated heat exchanger. The integrated heat exchanger includes channels formed in the first thermalization plate, and the channels are configured to allow helium to flow through the first thermalization plate during operation of the dilution refrigerator to improve heat exchange and cooling power of the dilution refrigerator.

Provided is a vacuum adiabatic body. To reduce a heat transfer amount between two plates, the vacuum adiabatic body includes: a conductive resistance sheet connecting plate members to each other, an exhaust port through which a gas of a third space is exhausted, and a sealing frame covering a conductive resistance sheet. A virtual line connecting both end portions of the conductive resistance sheet to each other is installed to be obliquely inclined when at least one extension direction of a first plate member or a second plate member is viewed in a horizontal direction.

To configure existing drawers as evacuable drawers of a vacuum drawer device, a cover for installation in the drawer body can be used. The cover evacuates at the drawer interior with an evacuation system, so that the interior is evacuated when the drawer is closed and ventilated before the drawer is opened. The cover is airtight, is profiled in such that evacuation with a controller, a pump and a valve are fixedly integrated in at least one recess in the cover and the cover has at least one air channel leading into the inside of the cover or, respectively, into the at least one recess, with the air channel operatively connected to the evacuation system such that when the cover is placed onto the drawer, air from the interior can be pumped out of the interior, the inside of the cover interior or, respectively, the at least one recess through the air duct.

A method for monitoring a drawer interior of a vacuum drawer device when the lid is supported by the drawer airtight and closed, includes: periodic measurement of the relative humidity with a humidity sensor arranged in the path of a dehumidifying channel in the lid or, respectively, the drawer interior; comparison of the measured relative humidity with an upper threshold; and as soon as the measured relative humidity is above the upper threshold, opening the valve and inducting a ventilator arranged in a recess or in the path of a dehumidifying channel in the lid. Fresh air is sucked through an air inlet opening, circulated, and thereafter released again from the dehumidifying channel and the drawer interior communicating therewith, until the relative humidity reaches a lower threshold measured by the humidity sensor. Then the valve is closed, the ventilator is stopped, and the controller switches into the humidity monitoring mode.

A multilayer cover has a sandwich design for placement on a drawer of a vacuum drawer device, and the cover allows an evacuation of the drawer interior after sealing against the drawer. The cover has an outer air-tight cover layer and a core layer, recesses molded into the core layer and partly into one of the at least one outer cover layer, and an evacuation channel, a pump, and at least one sensor are arranged therein. The cover is to have a more compact design with a very low height, resulting in a minimal susceptibility to malfunction. This is achieved in that a printed circuit board is arranged on one of the at least one outer air-tight cover layers so as to face the core layer or the at least one outer air-tight cover layer is designed as a printed circuit board on which the core layer lies and on which the electric components integrated into the cover are mechanically held and are electrically connected.

A method and apparatus is disclosed relating to food processing and preparation in commercial kitchens. The disclosed extreme vacuum cooling (EVC) technology and apparatus can work in ultra low pressure conditions with adaptive pressure control to avoid potential liquid splash inside the vacuum chamber caused by un-controlled low pressure conditions. Clean air or inert gas is added into the vacuum chamber so that the chamber pressure can track a setpoint trajectory that may have ramp up periods in order to avoid liquid splash events. The inventive apparatus allows the user to automatically cool various kinds of foods based on a recipe with minimal human interaction and meet food safety regulations. Different cooling recipes can be created based on the type and volume of the foods and a related vacuum pressure setpoint trajectory. High-volume food service kitchens can achieve less labor intensive, more time efficient, and higher throughput food preparation operations.

To configure existing drawers as evacuable drawers of a vacuum drawer device, a cover for installation in the drawer body can be used. The cover evacuates at the drawer interior with an evacuation system, so that the interior is evacuated when the drawer is closed and ventilated before the drawer is opened. The cover is airtight, is profiled in such that evacuation with a controller, a pump and a valve are fixedly integrated in at least one recess in the cover and the cover has at least one air channel leading into the inside of the cover or, respectively, into the at least one recess, with the air channel operatively connected to the evacuation system such that when the cover is placed onto the drawer, air from the interior can be pumped out of the interior, the inside of the cover interior or, respectively, the at least one recess through the air duct.

A under counter refrigerator includes a main body defining at least one of a first and second storage compartments, an evaporator to generate cool air to be supplied to the at least one of the first and second storage compartments, and a machine room provided at a lower portion of the main body to define an installation space in which a compressor and a condenser are provided. The machine room includes a suction portion provided in front of the main body to suction outside air into the machine room, a discharge portion provided in front of the main body to discharge the suctioned air in the machine room, a guide wall to separate the installation space into a first space in which the condenser is installed, and a second space in which the compressor is installed. A condensation fan is installed at the guide wall, the condenser is provided in a front portion of the first space, a defrosting water tray is provided at a rear of the condenser, and the condensation fan is disposed on one side of the defrost water tray.

A method and apparatus is disclosed relating to food preparation in commercial kitchens. The disclosed extreme vacuum cooling (EVC) technology and apparatus can work in ultra low pressure conditions with adaptive pressure control to avoid potential liquid splash inside the vacuum chamber caused by un-controlled low pressure conditions. Clean air or inert gas is added into the vacuum chamber so that the chamber pressure can track a setpoint trajectory that may have ramp up periods in order to avoid liquid splash events. The apparatus allows the user to automatically cool various kinds of foods based on a recipe with minimal human interaction and meet food safety regulations.