A monitoring system for a heating, ventilation, and air conditioning (HVAC) system of a building includes a monitoring device installed at the building, a monitoring server located remotely from the building, and a review server. The monitoring device measures an aggregate current supplied to components of the HVAC system and transmits current data based on the measured aggregate current. The monitoring server receives the transmitted current data and, based on the received current data, assesses whether failures have occurred in first and second components of the HVAC components. The monitoring server generates a first advisory in response to determining that the failure has occurred in the first component. The review server provides the first advisory to a technician for review and, in response to the technician verifying that the failure has occurred, transmits a first alert.

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Hvac system remote monitoring and diagnosis

A heat pump system for a vehicle includes a water cooled condenser that uses a coolant as a heat exchange media and uses waste heat generated from a motor and an electronic device to improve heating performance, efficiency, and dehumidifying performance. A control method is also described.

Heat pump system for vehicle

A monitoring system for a heating, ventilation, and air conditioning (HVAC) system of a residence includes a monitoring device installed at the residence and a server located remotely from the residence. The monitoring device measures an aggregate current supplied to a plurality of components of the HVAC system and transmits current data based on the measured aggregate current. The server receives the transmitted current data and, based on the received current, assesses whether a failure has occurred in a first component of the plurality of components of the HVAC system and assesses whether a failure has occurred in a second component of the plurality of components of the HVAC system.

Residential solutions hvac monitoring and diagnosis

A system and method for managing energy consumption of a building system includes a source of actual energy consumption data (430), a source of actual weather data (440), and a database (420) correlating discrete weather data values with expected energy consumption values for at least one component of the building system. A computer accesses the actual weather data, actual energy consumption data (430) and database (420), wherein the computer compares (450) the expected energy consumption values with actual energy consumption data and generates an output (470) based on the comparison. The expected energy consumption values are generated for the discrete weather data values using an energy consumption model that functionally relates discrete weather data values and design information for the buiding system component.

Model-based alarming

A system and method for monitoring the food product and refrigeration system performance of a remote location includes a management center in communication with a remote location through a communication network. The management center receives performance information of the refrigeration system at a remote location. The management center employs software modules to analyze the performance information, diagnose system conditions, and provide alarms for food safety and quality issues, refrigeration system component failure, and indicate maintenance conditions.

System for remote refrigeration monitoring and diagnostics

An air cooling temperature control system for use in vehicles including a cooler having a compressor, a heater having an air-mix damper and a room air temperature regulator, in which feedback control is effected so that a room air temperature may coincide with a preset temperature value. The output of the heater is regulated to respond to sudden changes in the room air temperature by controlling the opening of the air-mix damper. The duty cycle of the compressor is regulated by a controller so as to respond to gradual changes in room air temperature while the output of the heater is at a low level and to incrementally decrease the duty cycle of the compressor when the output of the heater is above the low level, thereby driving the output of the heater down so as to minimize the counteracting effects of concurrent heating and cooling, so that the desired room air temperature is maintained with minimal energy.

Air temperature control system for vehicles

PURPOSE:To adjust upper and lower blown air temperatures respectively in accordance with a season, weather and individual fondness in an air-mixing air conditioning device, by providing both bypass passages above and below a heater core and air mixing dampers above and below the downstream side of the heater core respectively CONSTITUTION:There are provided a heater core 10 almost in the central portion, bypass passage 25, 26 respectively above and below said core, simultaneously upper and lower layer air mixing chambers 17 and 18 in places after passing the bypass passages 25, 26 with the border of a partition plate 14 Further upper and lower layer air mixing dampers 15, 16 are provided respectively in outlets of the bypass passages 25, 26, and an end part of the partition plate 14 at the heater core side is arranged to the intersecting point of the dampers 15, 16 Accordingly, air sucked by a fan 4 from inside and outside air introduction ports 2, 3 passes the heater core 10 and the bypass passage 25, 26 through a cooler case 5, and is blown by control of the dampers 15, 16 at temperature suitable for each mode of summer, intermediate and winter seasons, defrosting operation or the like

Air conditioning device for automobile

An air conditioning apparatus for an automobile having a compartment comprises a cooling unit including an evaporator for cooling air, a heater for heating a portion of the cooled air, an air mixing damper for mixing the cooled air with the heated portion thereof and introducing the mixture into the compartment of the automobile, a control device for controlling the air mixing damper based on temperatures inside and outside of the compartment to keep the former at a constant temperature, a variable resistor connected operatively to the air mixing damper, and a temperature detector for detecting the temperature of the evaporator or the temperature of the cooled air supplied therefrom, the control device being responsive to an output of the variable resistor and the temperature detector for changing an operation command signal for the cooling unit.

Air conditioning apparatus for automobiles

PURPOSE:To protect the material of a case or the like from damages due to the temperature rise of an interior heat exchanger by limiting the inverter frequency of the current to be supplied to a compressor to the preset frequency when the detected temperature of the interior heat exchanger reaches the preset value. CONSTITUTION:A deviation operating means 32 operates the deviation by the signals of a diffuser temperature sensor 30 and a target temperature setting device 31, and a frequency determining means 33 determines the inverter frequency from the deviation and outputs the value to an inverter 17 through a correcting means 34, and controls the power supply to a driving motor 29 of a compressor from a battery 11 to realize the rotation corresponding to the determined frequency. The signal of an interior heat exchanger temperature sensor 35 is received by an overheat protecting means 37 during the heating operation, and when the temperature reaches the preset value of a setting means 38, an output is given to the correcting means 34 to limit the frequency of a frequency determining means 33 to the prescribed value. The output is given to a host preventing means 39 during the cooling operation, and the output is given to the correcting means 34 when the temperature from the setting means 40 exceeds the preset value. Thus, the thermal deformation of a plastic case of the interior heat exchanger during the heating operation, and the frost during the cooling operation can be prevented.

Air conditioner for electric vehicle

An air conditioner for vehicles in which the temperature of an evaporator is detected and an ON-OFF control of the compressor is achieved to maintain the evaporator temperature at a pre-set temperature. The air conditioner has means for detecting the temperature of air flowing into the evaporator, and means for varying the pre-set temperature in such a manner that the pre-set temperature is increased as the detected air temperature is decreased and is decreased as the detected air temperature is increased.

Ryosaku Akimoto

Papers

Air temperature control system for vehicles

Air conditioning device for automobile

Air conditioning apparatus for automobiles

Air conditioner for electric vehicle

Air conditioner for vehicles