Abstract:
In a device and method for taking temperature readings on an HVAC system, a first probe is connectable in thermal communication with the HVAC system for taking a first temperature reading thereof. A second probe is connectable in thermal communication with the HVAC system for taking a second temperature reading thereof that is independent of the first temperature reading. A digital display is connectable to the first and second probes for displaying the first and second temperature readings.
Abstract:
In an exemplary embodiment, a temperature sensor and a 4-20mA transmitter on a single flexible circuit subassembly with a separate housing suitable for use in industrial control or HVAC applications. In a preferred embodiment, a narrow flex circuit substrate includes a silicon diode-based surface-mount sensor at a sensor end, a surface-mount programmable transmitter IC on a flex circuit substrate in the transmitter section, conductive traces connecting the sensor to the transmitter IC, and two conductive pads at an output end for connecting the 4-20mA output to a pair of external wires. Additional traces on the flex subassembly are provided for testing and programming the transmitter IC and sensor. The sensor end of the flex subassembly is mounted in a metal sensor tube, filled and sealed in the same manner as RTD or thermistor sensors with leads are currently assembled for use in industrial control or HVAC applications. The sensor tube assembly is attached to a connection head following industry standard practices. A separate plastic housing, compliant with existing industrial control or HVAC industry standards for transmitters, is mounted in the connection head and is configured to hold the transmitter end of the flex circuit. A two position terminal block is used to connect external wires to the 4-20mA output pads. A programmable transmitter is used to calibrate both the sensor and transmitter which are mounted together on the same subassembly. This provides total system accuracy better than +/- 0.3°C over a 200°C span, compared to +/-.8°C accuracy for existing IEC class A RTD- based systems. The programmable transmitter reduces the component cost by eliminating the need for any high precision components in the system. Manufacturing and testing costs are reduced by fabricating, assembling, and testing many flex circuits together on one panel at the same time.
Abstract:
A temperature sensor fixing apparatus and an air conditioner having the same are provided to enhance installation efficiency of a temperature sensor by easily installing the temperature sensor at a refrigerant pipe even in a narrow space. A temperature sensor fixing apparatus includes a sensor holder(30) and a fixing member(50). The sensor holder receives a temperature sensor. The fixing member is inserted into the sensor to fix the temperature sensor at the sensor holder. The fixing member includes a first locking part(60), a press part(70), and a second locking part(80). The first locking part prevents the fixing member from being separated from the sensor holder. The press part presses the temperature sensor against the sensor holder. The second locking part is elastically deformed when being inserted into the sensor holder and restored after passing through the sensor holder so as to prevent the fixing member from being separated from the sensor holder.
Abstract:
A sensor with a sensor element (1) suitable for detecting temperature and with connection lines (11) connected to the sensor element is specified, which connection lines (11) are exposed to a stronger airflow (4) to be monitored than the sensor element (1) and which are intended for absorbing heat of the airflow to be monitored and for feeding this heat to the sensor element. ® KIPO & WIPO 2009
Abstract:
In a device and method for taking temperature readings on an HVAC system, a first probe is connectable in thermal communication with the HVAC system for taking a first temperature reading thereof. A second probe is connectable in thermal communication with the HVAC system for taking a second temperature reading thereof that is independent of the first temperature reading. A digital display is connectable to the first and second probes for displaying the first and second temperature readings.