16results 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.

The present invention relates to the technical field of temperature control and heating, and discloses a temperature control and heating method, device, computer equipment and medium for a variable liquid level material tank. The method comprises: when heating the variable liquid level material tank, constructing a relationship model between a first temperature of the outer wall of the tank and the temperature of the inner wall of the tank based on the principle of heat conduction from the outer wall of the tank to the inner wall of the tank; constructing a temperature control model based on the principle of convection heat transfer between the inner wall of the tank and the fluid in the tank and the relationship model; the temperature control model is a temperature control model including the relationship between the first temperature of the outer wall of the tank and the first temperature of the fluid in the tank; controlling the start or stop of the heating of the variable liquid level material tank based on the relationship between the first temperature of the outer wall of the tank and a first preset temperature threshold value in the temperature control model or based on the relationship between the first temperature of the fluid in the tank and a second preset temperature threshold value in the temperature control model, thereby controlling the heating temperature of the variable liquid level material tank. The present invention solves the problem that the temperature of the inner wall of the tank cannot be directly controlled, resulting in the inability to control the temperature of the tank body as the liquid level changes.

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.

A power supply for supplying a power to a heating mechanism used for heating a measurement target that emits a measurement signal includes an input device configured to output an input signal that reflects a control signal in a differentiable periodic waveform having a frequency of 1 kHz or less. The power supply includes a switching amplifier configured to amplify the input signal from the input device and output the amplified signal.

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).

A temperature control system for a hot surface igniter is disclosed, the temperature control system including: a power supply module for supplying power to the temperature control system; a drive module for outputting a voltage to the hot surface igniter; an acquisition module for sampling a thermoelectric signal of the hot surface igniter; a feedback module for receiving the thermoelectric signal, receiving a voltage control amount calculated based on the thermoelectric signal, and performing feedback; and a control module for receiving the fed-back voltage control amount and controlling the output of the power supply module based on the voltage control amount. In this way, by supplying a suitable voltage to the hot surface igniter, the hot surface igniter can be ensured to operate at a set target temperature, thereby precisely controlling the operating temperature of the hot surface igniter and extending the service life of the hot surface igniter.

Disclosed in the present invention is a temperature control system for a hot surface igniter, said system comprising: 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 invention 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.

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.

A water pipe winterizing assembly includes a pipe has a female hose coupling for engaging a hose bib on a building. A heating unit is attached to the pipe and the heating unit heats the pipe when the heating unit is turned on to inhibit the hose bib and associated water pipes from freezing. An insulating pad is positioned around the pipe and the insulating pad is comprised of a thermally insulating material thereby inhibiting thermal communication between the pipe and ambient air. A cover is positionable over the hose bib and the pipe extends through the cover. A retainer extends through the cover and the retainer is positionable around the hose bib when the cover is positioned over the hose bib for retaining the cover over the hose bib.

A temperature monitoring system (16) for use with a thermocouple (21) and a heater controller (24) to control a heater (1). The system (16) comprises a differential amplifier (17) which comprises a first input terminal (18) which is configured to connect to a first terminal (20) of the thermocouple (21) and a second input terminal (19) which is configured to connect to a second terminal (22) of the thermocouple (21). The differential amplifier (17) comprises an output terminal (23) which is configured to provide a temperature sense signal to the heater controller to control the heater (1). The system (16) further comprises a protection circuit (24) which is connected to the first input terminal (18) and the second input terminal (19). The protection circuit (24) is configured to operate in a first mode in the event that a leakage current flows into the first input terminal (18) or the second input terminal (19); and a second mode in the event that a leakage current flows out from the first input terminal (18) or the second input terminal (19), such that the protection circuit (24) controls the differential amplifier (17) to output a temperature sense signal which controls the heater (1) to operate at a temperature at or below a predetermined temperature to reduce the risk of damage being caused by the heater (1).