10results about "Temperature control using analogue comparing device" patented technology

An electrical heating device (100) having a CPC constant power heating cable (10) inserted into an open structure (200) having a core profile (201) and / or a cover element (202), the electrical heating device (100) being quickly assemblable, the CPC (10) being directly connected to an electrical network and / or a control unit (110) without the use of power cables. The electric heating device (100) can be mounted in any direction, the CPC (10) having connections at both the head and the base of the structure (200). The electric heating device (100) has a power regulator (111) with software (112) in the control unit (110), which power regulator performs control of the electric power in order to keep the energy flow towards the CPC (10) constant depending on the desired temperature, prevent the closing and opening of the cycle at maximum power, and allow the simultaneous use of a plurality of electrical appliances.

A voltage reference circuit (10) comprises one or more circuit components (D1, D2, Q1, Q2) configured to generate a first voltage (V1) and a second voltage (V2), wherein the first voltage has a first temperature coefficient, and the second voltage has a second temperature coefficient that is different from the first temperature coefficient. An adjustment circuit (12) is configured to generate an adjusted voltage (Vx) as product of the first voltage and an adjustment factor (x), wherein the adjusted voltage is designed to equal the second voltage in equilibrium at a target temperature (T0). A control device (14) is configured to provide a control signal (CV) based on a difference between the adjusted voltage and the second voltage. A heater device (16) is configured to generate heat (H) in response to being controlled by the control signal, wherein the heater device is thermally coupled to the one or more circuit components, thus forming a feedback loop for establishing the equilibrium at the target temperature. An output terminal (18) is configured to provide a reference voltage (Vref) as function of the first voltage or the second voltage.

In an embodiment a voltage reference circuit includes one or more circuit components configured to generate a first voltage and a second voltage, wherein the first voltage has a first temperature coefficient and the second voltage has a second temperature coefficient that is different from the first temperature coefficient, an adjustment circuit configured to generate an adjusted voltage as product of the first voltage and an adjustment factor, wherein the adjusted voltage is designed to equal the second voltage in an equilibrium at a target temperature, a control device configured to provide a control signal based on a difference between the adjusted voltage and the second voltage, a heater device configured to generate heat in response to being controlled by the control signal, wherein the heater device is thermally coupled to the one or more circuit components thereby providing a feedback loop configured for establishing the equilibrium at the target temperature and an output terminal configured to provide a reference voltage as a function of the first voltage or the second voltage.

Various embodiments of the present technology may provide methods and apparatus for controlling a nebulizer. Methods and apparatus for controlling a nebulizer may be integrated within an electronic device. An embodiment of a system may include a control circuit responsive to an input signal from a sensor. The control circuit may be configured to determine a temperature event based on the input signal and a criterion. The control circuit may be further configured to generate an output signal in accordance with the temperature event.

Electric heating device (100) with CPC constant power heating cable (10) inserted within an open structure (200) with core profiles (201) and / or covering elements (202), being rapidly assemblable with direct connection of said CPC (10) with the power grid and / or with a control unit (110), without using power cables. Said electric heating device (100) mountable with any orientation, said CPC (10) having a connection both at the head and at the base of said structure (200). The electric heating device (100) has a power regulator (111) with software (112) in said control unit (110) which carries out a control of the electric power so as to keep the flow of energy towards the CPC (10) constant as a function of the desired temperature, preventing switch-off and switch-on cycles at maximum power and allowing the simultaneous use of multiple appliances.

To provide a high efficiency and low noise power source and an inspection device.SOLUTION: A power source that supplies power to a heating mechanism used to heat a measurement target that emits a measurement signal includes an input unit that inputs an input signal obtained by reflecting a control signal in a differentiable periodic waveform with a frequency of 1 kHz or less, and a switching amplification unit that amplifies the signal input from the input unit with a switching circuit and outputs the signal.SELECTED DRAWING: Figure 4

Disclosed are systems and methods that provide a novel thermostat system, which involves a hybrid line volt two-way thermostat configured with triode for alternating current (TRI AC) and relay components. The configuration and operational benefits of each thermostat type can be leveraged by the disclosed hybrid thermostat, which can provide a silent, efficiently operated thermostat system. Such system provides a resource efficient heating, ventilation and cooling control system that can reduce power consumption and thereby reduce costs, while maintaining a streamlined, operationally accurate framework for monitoring and managing the climate of a location (e.g., building, home, office, and the like).

The embodiment of the invention relates to the technical field of geothermal well temperature control, and provides a geothermal well temperature gradient control method and system and a medium, and the method comprises the steps that multi-source monitoring data of a target geothermal well are acquired, and the multi-source monitoring data comprise pressure data and temperature data; based on the multi-source monitoring data, a temperature gradient reference curve of the target geothermal well in the depth direction of a shaft is drawn up; based on the multi-source monitoring data and the three-dimensional point cloud data of the target geothermal well, constructing a geothermal well heat transfer model of the target geothermal well by using a heat transfer dynamics principle; and dividing the target geothermal well into a plurality of well depth sections along the depth direction of the shaft, and determining a temperature gradient control strategy for the plurality of well depth sections based on the temperature gradient reference curve and the geothermal well heat transfer model. According to the embodiment, the overall heat loss rate of the target geothermal well can be effectively reduced, the temperature gradient control precision is improved, the efficient regulation and control requirements of complex underground working conditions are met, and the operation efficiency and the resource utilization rate of the geothermal well are improved.

A temperature control system for a hot surface igniter, the system including: a power source module, for providing energy of the system; a driving module, for outputting a voltage to the hot surface igniter; a collection module, for sampling a thermoelectric signal of the hot surface igniter; a feedback module, for receiving the thermoelectric signal, receiving a voltage control quantity calculated according to the thermoelectric signal, and then performing feedback; and a control module, for receiving the voltage control quantity that is fed back and controlling the output of the power source module according to the voltage control quantity. The present disclosure can enable the hot surface igniter to receive a suitable voltage to ensure that the hot surface igniter operates at a set target temperature, thereby realizing precise control over the operating temperature of the hot surface igniter, and increasing the service life of the hot surface igniter.

Device comprising: an active device (15) with a first connection (30); a first bias resistor (35) connected to the first terminal and a second bias resistor (37) connected in series with the first bias resistor; and a first resistor (40) with a first phase transition material connected in parallel with the first bias resistor, wherein the first phase transition material has a first phase with low conductivity for temperatures below a first phase transition temperature and a first phase with high conductivity for temperatures above the first phase transition temperature; a second resistor (42) comprising a second phase transition material connected in parallel with the second bias resistor, wherein the second phase transition material has a second phase with low conductivity for temperatures below a second phase transition temperature and a second phase with high conductivity for temperatures above the second phase transition temperature.