摘要:
The invention provides a system adapted to modify a temperature of a space based on a user selected set-point for the temperature of the space, e.g. a refrigerator, a sauna or a regular building with a HVAC system. The set-point is selected via a control structure which includes a handle being movable relative to a base. In order to simplify the installation and the structure of the space, and further to enable better thermal isolation of the space, the handle comprises a temperature sensing structure. Accordingly, no additional installation work, cabling, and penetration of the wall into the space are necessary for installing separate temperature sensing devices.
摘要:
The present invention discloses a refrigerator which can keep the contents in a non-frozen state by an electric field generated by a radio frequency voltage. The refrigerator includes a setting unit for setting a amplitude and frequency of a voltage, a generating unit for generating an electric field according to the voltage having the set amplitude and frequency, and applying the electric field to a storing space for storing the contents, and a freezing cycle for cooling the storing space. The contents are kept in a non-frozen state below a phase transition temperature.
摘要:
The invention relates to a method of controlling a cell that is used for the rapid cooling of a cooked product in order to preserve same, essentially comprising an insulated chamber, an interior air circulation device, a cold production element having a heat exchanger which is generally placed inside the insulated chamber and at least one probe which can be inserted into centre of the product. The inventive method comprises the following steps consisting in: taking a periodic measurement of the internal temperature of the product to be cooled and of the temperature of the ambient air in the chamber; and using said temperature measurements to determine a set value for the temperature of the ambient air inside the chamber regardless of the product type, product structure, product weight in the apparatus, product thickness, product packaging or the capacity of the apparatus. The set temperature value for the ambient air in the chamber is used to control the cold production element until the end of the cooling cycle in order to obtain an internal temperature at the end of the cycle that is less than a pre-determined end internal temperature using a cycle length of less than or equal to a pre-determined maximum cycle length. The invention is suitable for commercial and institutional catering and for the agri-food industry.
摘要:
The pull-down cooling characteristic representing the mode of variation with time of the target temperature fall in a pull-down cooling range is stored as data in a storage unit (49). If this characteristic is represented by, e.g., a straight line xp of a linear function, the target in-storage temperature fall rate is a constant Ap independently of the in-storage temperature. When pull-down control is started, the in-storage temperature is detected every predetermined sampling time. The actual temperature fall rate Sp is calculated from the detected in-storage temperature and compared with the target value Ap read out of the storage unit (49). If the calculated value Sp is the target value Ap or less, the rotational speed of an inverter compressor (32) is increased through an inverter circuit (50); contrarily if the calculated value Sp is above the target value Ap, the rotational speed of the compressor (32) is decreased. While repeating this, pull-down cooling is performed following the straight line xp.
摘要:
Eine zum Kühlen einer Ware geeignete Anordnung umfasst ein Steuergerät (8) mit einer Datenbasis (26), in der wenigstens ein Zeitintervall t a _t b und ein im Zeitintervall geltender Temperatursollwert ϑ c abgespeichert ist. Im Steuergerät (8) ist eine Reglerfunktion implementiert, durch welche die über einen Temperaturfühler (12) auf das Steuergerät (8) zurückgeführte Temperatur ϑ R eines thermisch isolierten Innenraums (6) abhängig vom Zeitintervall t a_ t b durch Aktivieren beziehungsweise Deaktivieren einer Kühleinrichtung (9) auf den Temperatursollwert ϑ c geregelt wird. Da die Ware - beispielsweise abgefüllte Getränke - nur im Zeitintervall t a_ t b gekühlt verfügbar ist, wird Energie eingespart und somit auch die Emission von Kohlenstoffdioxid reduziert.
摘要:
A system and method for controlling refrigeration including a temperature sensor operable to measure a temperature from a refrigeration case and a transceiver in communication with the temperature sensor and operable to wirelessly transmit data. A repeater receives the wirelessly transmitted data and further wirelessly transmits the data to a receiver. A controller in communication with the receiver controls the refrigeration system based upon the wirelessly transmitted data from the refrigeration case. The refrigeration case also includes a mode switch for suspending temperature reading and control for a period of time. For example, the mode switch can be used by an operator during cleaning or maintenance of the refrigerator case. Temperature control algorithms are used by the controller, and include: dead-band range (DB), proportional/integral (PI), proportional/integral/differentiation (PID) and fuzzy-logic (FL).
摘要:
The present invention discloses a refrigerator which can perform direct cooling of circulating cool air by natural convection in a freezing chamber (F) and a refrigerating chamber (R), and which can selectively perform indirect cooling of circulating cool air by forcible convection in the refrigerating chamber. It is like that, frost or condensed water formed in the refrigerating chamber (R) of the direct cooling type refrigerator does not Influence the inside- of the refrigerating chamber. In addition, the refrigerator efficiently performs a defrosting opertion, of the refrigerating chamber (R), sanitarily performs a cooling operation, and maintains uniform cooling performance.
摘要:
A controlled rate freezer (10) for the controlled freezing of biological material, the freezer comprises a first chamber (14) for holding biological material to be frozen, a second chamber (20) for holding a cryogenic substance, forced convection means (22, 24) for lowering the temperature of the first chamber (14) by forcibly moving air present in the first chamber (14) towards the second chamber (20) whereby heat transfer occurs at the second chamber (20), and control means (26) for monitoring the temperature of the first chamber (14) and controlling the forced convection means (22, 24) based on the monitored temperature, so that in use the lowering of the temperature of the first chamber (14), and thus the freezing of the biological material, follows a material-dependent predetermined optimum or substantially optimum freezing profile. The forced convection means includes two recirculating flow paths (32, 40) along which air in the first chamber (14) is movable at a rate controlled by the control means (26). The first flow path (32) is solely located in the first chamber (14) and spaced from the second chamber (20) so that air travelling on the first flow path (32) is not subjected to direct cooling at the second chamber (20), and the second flow path (40) meets the first flow path (32) and extends to the second chamber (20), so that air travelling on the second flow path (40) is subjected to cooling at the second chamber (20) and feeds the air thus cooled onto the first flow path (32).
摘要:
A method and device for controlling the inside temperature of a refrigeration compartment, wherein control means are controlled by a thermostat; a temperature sensor is located far away from the refrigerating means and in a specific portion of the inside volume of the refrigeration compartment, e.g. on a lighting fixture; and the specific portion of the inside volume of the refrigeration compartment is selected with the exclusion of a first top portion of the volume of the refrigeration compartment having a volume equal to 8-10% of the total inside volume of the refrigeration compartment, with the exclusion of a second front portion of a depth equal to at least 10% of the total inside depth of the refrigeration compartment, and preferably also with the exclusion of a bottom portion of the refrigeration compartment.
摘要:
A method and apparatus for refrigeration system control are provided. The refrigeration system includes a plurality of circuits (26) with each circuit having at least one refrigeration case (22). An electronic evaporator pressure regulator (28) is in communication with each circuit and is operable to control the temperature of the corresponding circuit. A plurality of compressors are also provided with each compressor forming a part of a compressor rack (18). A pressure sensor (36) is used for measuring the suction pressure of the compressor rack. A sensor is in communication with each circuit and is operable to measure a parameter from each circuit. A controller (30) controls each electronic evaporator pressure regulator and the suction pressure based upon the measured parameters from each circuit.