Abstract: A fan control unit includes: an internal fan that is provided inside a casing, in which an inverter containing a switching element is disposed, and generates an air current for air-cooling inside the casing; a heat sink which is exposed inside a duct provided on the casing and to which the switching element is attached, the duct being provided with an air-intake port and an air-exhaust port; an air-intake fan disposed at the air-intake port of the duct; an air-exhaust fan disposed at the air-exhaust port of the duct; and a control section performing a control such that the air-exhaust fan is turned on earlier than the air-intake fan and the internal fan as output power increases, and that the internal fan and the air-intake fan are turned off earlier than the air-exhaust fan as output power decreases from a state in which all the fans are kept turned on.

Abstract: A wide range of temperature control equipment for controlling a tested object to a predetermined temperature is provided. The wide range of temperature control equipment includes a thermal conducting plate, a temperature regulating module, a carrier plate, and a thermoelectric cooling module. The temperature regulating module is thermally connected to the thermal conducting plate for regulating the thermal conducting plate to a reference temperature. The carrier plate is used to accommodate the tested object. The thermoelectric cooling module is thermally connected between the thermal conducting plate and the carrier plate for controlling the tested object to the predetermined temperature via the carrier plate based on the reference temperature.

Abstract: A load processing balance setting apparatus includes first and second air-conditioners for targeted first and second areas, a calculating unit, a determining unit and an adjusting unit. The first area is included within the second area. The calculating unit calculates a sum of an air-conditioning load for the first and second air-conditioners. Preferably, the determining unit determines a first and second processing throughputs for the first and second air-conditioners so that a COP (Coefficient of Performance) for the sum of the air-conditioning loads calculated by the calculating unit is maximized or is equal to or greater than a predetermined level, or so that a power consumption level for the sum of the air-conditioning loads calculated by the calculating unit is minimized or is equal to or less than a predetermined level. The adjusting unit controls the first and second air-conditioners based on the first and second processing throughputs.

Abstract: The present invention provides an energy efficient air conditioner that can provide a continuous supply of air at dew point that is several degrees Celsius below zero, without requiring a defrost cycle. The air conditioner in accordance to present invention comprises a plurality of cooling coils with interconnecting refrigerant piping, refrigeration circuit consisting of compressor and condenser coils, control circuit and one or more electric motor driven centrifugal fan. The present invention uses two cooling systems. The first cooling system having single coil cools the air to a temperature just above zero deg. C., say four deg. C. so that the second stage gets a steady supply of cold air. The second stage has two coils, each being half the size of the first stage coil, thus taking half the air from it so that all the air from stage 1 passes through stage 2. In operation, only one coil of the second stage is active arid chills the air going through it to say minus 14 Deg. C.

Abstract: A fluid heating system configured to regulate a temperature of a fluid within a fluid receptacle having a fluid reservoir includes a processing unit, at least one fluid temperature sensor in electrical communication with the processing unit, and a heating element in electrical communication with the processing unit. The at least one fluid temperature sensor is configured to detect a temperature of one or both of the fluid receptacle and/or fluid retained within the fluid receptacle. The processing unit selectively activates and deactivates the heating element to regulate the temperature of the fluid within the fluid receptacle.

Abstract: Methods and apparatus for cooling a reticle are disclosed. According to one aspect of the present invention, an apparatus for providing top side cooling to a reticle includes a heat exchanger arrangement and an actuator. The heat exchanger arrangement includes a first surface arranged to facilitate heat transfer between the reticle and the heat exchanger arrangement. The heat transfer provides cooling to at least some portions of the reticle. The actuator positions the first surface of the heat exchanger arrangement at a distance over the reticle.

Abstract: The circulation main loop supplies the liquid coolant by means of the main pump to the cooling plate which cools the electronic element, and then, dissipates the heat by the main heat exchanger 20 to return the same to the reservoir tank. The circulation sub-loop supplies the liquid coolant by means of the sub-pump, and after dissipating the heat by the sub-heat exchanger, returns the same to the refrigerant tank. The controller controls as required the supply flow rate from the main pump and the sub-pump.

Abstract: In one aspect, a food thawing cabinet includes at least one thawing chamber and one or more wall blowers and a heater for producing a controlled high volume of air flow over food product, with the heater controlled in a cyclic manner. In another aspect, various advanced control techniques for controlling heat input are provided in an effort to lower the time required to thaw frozen food products in a safe manner.

Abstract: A rethermalization system for food trays having a hot food side and a cold food side, the system includes a first thermal system having a heating source, a refrigeration coil and a blower; a second thermal system having first and second refrigeration coils and a blower; and a control system operable in one mode to activate the refrigeration coil of the first thermal system and the first refrigeration coil of the second thermal system, and operable in a second mode to activate the heating source of the first thermal system and the first and second refrigeration coils of the second thermal system.

Abstract: A bipartite cooling system comprises a first set of cooling equipment that provides for closed cooling air circulation inside a cabinet and a second set of cooling equipment that provides for open cooling air circulation inside the cabinet. For most of the year, cooling of the cabinet can be handled with the first set of cooling equipment, which consists of an air-to-air heat exchanger. For the short period of time that the heat exchanger alone cannot ensure sufficient cooling of the air inside the cabinet, the second set of cooling equipment provides through-flow air circulation. This is achieved by drawing air into the cabinet through a filter and blowing warmed-up air out.

Abstract: A control system for a refrigerator quick chill and thaw system comprises an electronic controller coupled to the operable components of a modular air handler for producing a convective airstream in a sealed pan for rapid chilling and safe thawing. The controller is configured to operate the air handler to execute a chill mode when selected by a user, operate the air handler to execute a thaw mode when selected by a user, adjust the air handler components for the selected chill mode or thaw mode, and maintain a constant temperature airstream in the pan to execute the selected chill mode or the thaw mode. Adaptive chill and thaw algorithms are executable by the controller in response to user input and temperature conditions inside the sealed pan.

Abstract: A heating, ventilation and air conditioning (HVAC) device (104) which includes both heating and cooling operating modes provides an easy-to-use interface (110) for selecting the operating parameters of the device (104). The interface (110) allows the input of a setpoint temperature at which the HVAC device (104) conditions the ambient temperature of a space (102). A mode switch-over algorithm (200) uses the setpoint temperature, the sensed temperature from the conditioned space, and prestored threshold values that depend on the device's operating capacities, to determine when to change the device between heating and cooling modes. Also, within each of the respective modes, a heating (300) or cooling (400) algorithm controls the engaging and disengaging of the heating and cooling elements of the device (104) to maintain the temperature of the conditioned space (102) within a desired comfort zone.

Abstract: A control used in a two stage HVAC system has a power supply from a 24 VAC transformer which is full wave rectified (D1, D2, D3, D4) to create DC voltages for a microcontroller (U1) and relays (K1-K3). All of the control information needed for the two stage control system is sent to the control from a room thermostat (12) having first and second stage cooling signal terminals (Y1, Y2) over a single line by connecting a diode between the Y1, Y2 terminals creating separate microprocessor recognizable signals.

Abstract: A blood heating system for use in open heart surgery including an arterial/venous fluid circuit, a cardioplegia fluid circuit independent of the arterial/venous fluid circuit, a first heater in heat exchange relationship with the arterial/venous fluid circuit, a second heater in heat exchange relationship with the cardioplegia fluid circuit, a power supply connected to the first and second heaters so as to supply a desired electrical power, to the first and second heaters, and a controller electrically interconnected to the power supply and to the first and second heaters such that the first and second heaters cannot be activated simultaneously. A relay is electrically interconnected between the first and second heaters and the power supply so as to deactivate one of the heaters when the other of the heaters is activated. A timer is connected to the relay so as to alternately activate and deactivate the respective heaters after a desired period of time.

Abstract: A high turn down ratio furnace is attained by plural burners or burner stages having control valves operated by thermal sensors. Heat output control is by a variable pressure device for the fuel supplied to the burners and individual on-off valves for some of the burners. Burner arrangement and/or design and control enables one primary burner to ignite a secondary burner so that it can ignite other secondary burners, so that only one flame ignition device at the primary burner is necessary.

Abstract: An improved heat pump system of the type having a thermostat capable of generating at least three stages of demand signals, outdoor and indoor heat exchange coils, at least one fan, a compressor, an expansion device, with the flow of refrigerant being reversible for purposes of selecting between heating and cooling modes of operation and a supplemental heater having a plurality of supplemental heating units for further heating an air stream passing over the indoor coil through an air supply plenum to supply air to a comfort space. An improvement in this system where each of the supplemental heating units has a unique heating capacity; a combination of supplemental heating units can be selected that is responsive to a demand for heat from the thermostat; and the selected supplemental heating units are turned on appropriately so that the level of heat demand by the thermostat is provided.