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| Number | Title | Issue Date |
| 7281386 | Residential ice machine An automatic ice making machine includes a refrigeration system comprising a compressor, a condenser, an evaporator and an expansion device; a water system comprising an ice forming surface in thermal contact with the evaporator; and a control system comprising i) a... | 10/16/2007 |
| 7268505 | Electric machine and method of operating the electric machine A method of and apparatus for controlling an electric machine. The method can include using a controller to detect whether power is present at a first node of the controller, detect whether power is present at a second node of the controller, generate at least one s... | 09/11/2007 |
| 7126300 | Motor drive system A first and a second motor drive amplifiers connected to a motor drive power supply include a first and a second memories which store specifications of the amplifiers, respectively. A memory provided in a power supply unit stores an overcurrent detection value for d... | 10/24/2006 |
| 7081733 | Speed control system of fan motor of air conditioner A speed control system of a fan motor of an air conditioner is disclosed. A speed control system of a fan motor of an air conditioner comprises: an inverter having a power output terminal connected to a single-phase power input terminal of the fan motor which has a ... | 07/25/2006 |
| 7007506 | Refrigeration system utilizing incomplete evaporation of refrigerant in evaporator A refrigeration system allows the refrigerant to circulate through a closed circulation channel. A dry evaporator is incorporated in the circulation channel. The dry evaporator is designed to keep a quality smaller than 1.0 in evaporating the refrigerant. The quanti... | 03/07/2006 |
| 6951402 | Refrigeration appliance interior lighting system A refrigeration appliance interior lighting system for sensing the exterior light level and adjusting the light level accordingly within the interior of the home appliance. The refrigeration appliance interior lighting system includes a control unit in electrical co... | 10/04/2005 |
| 6931869 | Refrigerated vending machine exploiting expanded temperature variance during power-conservation mode A refrigerated vending machine for dispensing items (such as soda cans or other beverage containers) includes a power source and a cooling system (e.g., evaporator, condenser, compressor, circulating fan). Power control circuitry selectively provides electrically co... | 08/23/2005 |
| 6912867 | Combined water cooler and refrigerator unit A combination water cooler and refrigerator unit is provided including a lower cabinet defining a refrigerated compartment, and an upper water reservoir for receiving a supply of water from a water source, such as an inverted water bottle. A refrigeration system mou... | 07/05/2005 |
| 6845627 | Control system for an aircraft galley cooler An aircraft galley air cooling system utilizes a controller having software for regulating the temperature within food carts within a galley air cooling unit. The cooling unit includes supply air and return air temperature sensors which measure the temperature of th... | 01/25/2005 |
| 6354093 | Control system and related methods for refrigeration and freezer units A cooling system and related method of defrosting a refrigeration unit or a freezer unit involves the steps of (a) monitoring a compressor running time, (b) monitoring an evaporator coil temperature, (c) monitoring a first time period since a last cooled ... | 03/12/2002 |
| 6311509 | Chiller with automatic probe detection and filtered temperature display In a chiller, an apparatus and method for automatically identifying a temperature probe for use in a chilling operation is provided in order to reduce user error. In the place of manual selection by a user, automatic selection of the appropriate temperatu... | 11/06/2001 |
| 6050098 | Use of electronic expansion valve to maintain minimum oil flow A method of controlling an expansion valve including the steps of: measuring a primary system condition; determining an error in the primary system condition; measuring a secondary system condition; determining an error in the secondary system condition; ... | 04/18/2000 |
| 5983655 | Thermal storage monitoring and control system for cargo container A thermal storage monitoring and control system employed on a container refrigeration unit utilizes a "thermal flywheel" algorithm in combination with a data processor to control the temperature level within a cargo container to a maximum value. The therm... | 11/16/1999 |
| 5950443 | Compressor minimum capacity control A method of controlling compressor minimum capacity. The method comprises the steps of: measuring a first condition; comparing the first condition to a first setpoint to determine a first conditioned error; modulating compressor capacity relative to the f... | 09/14/1999 |
| 5749238 | Control arrangement for a cooling apparatus A control arrangement for cooling of an apparatus comprising a compressor, a condenser, and at least one branch with an expansion valve and an evaporator in series, contains a controller, a superheat temperature measuring device, and an ambient temperatur... | 05/12/1998 |
| 5669231 | Air conditioning apparatus When a defroster switch is input in a heating operation mode, an opening degree of an electric type of a heating expansion valve is controlled to be smaller when temperature of refrigerant discharged from a compressor is less than a predetermined temperat... | 09/23/1997 |
| 5647220 | Method of controlling cooling in a vending machine and device therefor Merchandise temperature sensors 16 for detecting merchandise temperatures simultaneously with in-housing temperature sensors 17 for detecting the in-housing air temperature of a merchandise housing are provided in the merchandise housing of a vending mach... | 07/15/1997 |
| 5611484 | Thermostat with selectable temperature sensor inputs A thermostat has terminals to receive at least two temperature sensor signals, and changes the one of these terminals which provides the feedback signal for temperature control responsive to a detected condition. This condition may be a manual input, expi... | 03/18/1997 |
| 5477699 | Evaporator fan control for a refrigerator A refrigerator having a cabinet defining a first compartment and a second compartment separated from each other by a divider wall wherein the divider wall has an air passage for communicating between the first and second compartments. The refrigerator fur... | 12/26/1995 |
| 5299430 | Air conditioner The object of the present invention is to make it easy to separate a portion which takes charge of the operation control of an air conditioner from the air conditioner using a remote controller, and the essential points are that the control means of the a... | 04/05/1994 |
| 5209072 | Refrigeration temperature control system Apparatus for and method of long-term control of the temperature within a refrigerated space, such as the cargo compartment of a refrigeration truck. The technique employs sensors which monitor both discharge and return air. A control algorithm uses the m... | 05/11/1993 |
| 5123252 | Method of operating a transport refrigeration unit A method of operating a transport refrigeration unit with microprocessor based control. The microprocessor automatically selects an operative control algorithm, according to system configuration, with each algorithm having one or more operating conditions... | 06/23/1992 |
| 5123080 | Compressor drive system A compressor drive system that includes a thermostat producing a signal indicating the measured air temperature, a modulation control circuit connected to the thermostat to produce a motor drive signal from the temperature signal and which is output to a ... | 06/16/1992 |
| 5014522 | Automotive air tempering apparatus An automotive air tempering apparatus for use in an automotive vehicle having a duct through which air is directed into a passenger compartment. The apparatus comprises an air chilling unit including an evaporator provided in the duct and a compressor hav... | 05/14/1991 |
| 5003785 | Air-conditioning system for a vehicle An air-conditioning system controls the temperature of the air flow such that a deviation of an interior temperature of the passenger compartment of the vehicle determined by an interior temperature sensor from a givable desired temperature becomes minima... | 04/02/1991 |
| 4977752 | Transport refrigeration including methods and apparatus for optmizing same A transport refrigeration system having a refrigerant compressor which is selectively operable with either an electric motor or an internal combustion engine. The transport refrigeration system conditions a load space to a selected set point via heating a... | 12/18/1990 |
| 4966012 | Air-conditioner for automobile An automobile air-conditioner wherein a total signal corresponding to a thermal load in the passenger compartment of an automobile and a head part total signal corresponding to a thermal load in the vicinity of the head of an occupant of the passenger com... | 10/30/1990 |
| 4893479 | Compressor drive system A compressor drive system that includes a thermostat producing a signal indicating the measured air temperature, a modulation control circuit connected to the thermostat to produce a motor drive signal from the temperature signal and which is output to a ... | 01/16/1990 |
| 4748822 | Speed control of a variable speed air conditioning system Provision is made in a multiple zone air conditioning system for varying the speed of the compressor to match the load thereon. The differences between the actual temperatures and the set points in the individual zones are monitored and the largest of the... | 06/07/1988 |
| 4637220 | Refrigeration system for both vehicle air conditioner and refrigerator A refrigeration system having two evaporators to function as both an air conditioner and refrigerator of a vehicle is disclosed. The two evaporators are connected parallel with one another, with one of the two evaporators being disposed in the duct portio... | 01/20/1987 |
| 4622827 | Control apparatus for an air conditioner This apparatus selects a start-up mode of operation for controlling the compressor (1) at maximum speed only when the difference between the measured temperature of a room at the start of the operation and a target temperature is larger than a predetermin... | 11/18/1986 |
| 4569476 | Method for controlling a temperature A method for controlling a temperature of an object to be cooled or heated by a cooling/heating apparatus is improved in that when all of a plurality of temperature detectors for detecting a temperature of the object are operating normally, the cooling/he... | 02/11/1986 |
| 4560106 | Heating and/or air-conditioning installation for motor vehicles In a heating and/or air-conditioning system for motor vehicles with a temperature sensor in the head space and a temperature sensor in the leg space as component parts of an interior space temperature regulating installation, the temperature sensors are s... | 12/24/1985 |
| 4509586 | Temperature control device for a refrigerating apparatus having both a heating means and a cooling means A refrigerating apparatus adapted for storage of cold storage goods as well as frozen goods and having both a heater and a cooler is controlled by an improved temperature control device, which includes a detector for detecting a temperature of return air ... | 04/09/1985 |
| 4274264 | Chiller control A control means is disclosed that is used with a closed refrigeration system having a chiller and a condenser to provide refrigeration to chill the fluid medium and a refrigerant pump for pumping the refrigerant through the system with refrigerant capacit... | 06/23/1981 |
| 4197717 | Household refrigerator including a vacation switch An automatically-defrosting household refrigerator including a user-operable "vacation switch" effective to enable the operation of the refrigerator in a mode appropriate to a condition of zero usage. When the vacation switch is thrown to the vacation pos... | 04/15/1980 |
| 4109482 | Fan control circuit for air conditioner A control circuit for a room air conditioner includes two temperature sensing devices and an associated switch network which operate to de-energize the evaporator fan upon de-energization of the compressor but, as the temperature of the room air subsequen... | 08/29/1978 |
| 4033739 | Refrigeration unit A dual temperature refrigerator driven by a single compressor, having a refrigeration cycle provided with a condenser, a refrigerant metering device and refrigerant transfer lines with at least two evaporator sections connected in series with the first in... | 07/05/1977 |
| 4021213 | Food storage refrigeration cabinet having optional fast chill cycle This invention teaches a food storage refrigeration cabinet suited for operation either on a conventional refrigeration cycle or on a fast cool down refrigeration cycle. The disclosed cabinet has partition structure that separates a food storage space fro... | 05/03/1977 |
| 3973618 | Electronic capacity control or direct expansion refrigeration of air conditioning systems The invention relates to the air conditioning of a storage compartment and is especially significant for a transport system. Air is circulated between an air tempering zone and the storage compartment, said air tempering zone having air cooling means and ... | 08/10/1976 |
