9 results about "Passive heating" patented technology

The utility model provides a smog detection device suitable for a low convection environment, comprising an active smog detector, a passive heating smog detector, a fixed smog detector and a host computer, the active smog detector, the passive heating smog detector and the fixed smog detector are connected with the host computer; the active smoke detector comprises a sampling tube, an aspirator, a first smoke sensor, a first circuit board and a first transmission module; the passive heating smoke detector comprises a heat convection chamber, an annular heater, a second smoke sensor, a second circuit board and a second transmission module; a three-dimensional sampling network is formed by adopting the active smoke detector, the passive heating smoke detector and the fixed smoke detector, so that early warning can be transmitted to an upper computer in time even in a low convection environment or a low smoldering condition.

The invention relates to the technical field of overwintering storage of peony seeds in alpine regions, and discloses an overwintering storage method and storage device for peony seeds in alpine regions, the storage device comprises a passive heating mechanism, and the passive heating mechanism is fixedly mounted in a supporting cylinder. The overwintering storage method for the peony seeds in the alpine region comprises the steps that firstly, sand is stirred, a sand layer is laid, and the peony seeds are placed; secondly, the storage barrels and the storage plates are placed in a combined mode; thirdly, passive geothermal heating is conducted on the heat preservation barrel; 4, oxygen is introduced into the heat preservation cylinder at regular time, humidity is automatically controlled, and temperature is monitored in real time; and step 5, determining the low-temperature sand storage time of the peony seeds. The method has the beneficial effects that a temperature guarantee is provided for low-temperature sand storage stratification treatment in the alpine regions of the peony seeds, and through automatic control over ventilation, oxygen supply and humidity of the storage device, the appropriate humidity of the sand layer is kept, and the problem that the peony seeds are mildewed due to oxygen deficit in the overwintering storage process is solved.

A thermal management system for a neutral-forming transformer (NFT) includes a duct path with a fan, a damper, and inlet and outlet valves that direct airflow between the NFT and an auxiliary device. Sensors detect NFT temperature, NFT current imbalance, and auxiliary device temperature. A controller operates the fan and positions the damper to provide cooling of the NFT, bypass the NFT, or distribute airflow to both the NFT and the auxiliary device. The fan operates at multiple speeds and in forward or reverse directions. The damper positions include directing airflow exclusively to one region or splitting airflow between regions. Control is based on absolute values or rates of change of sensed conditions. When the auxiliary device temperature is below a cold-start value, the valves close and the fan deactivates to retain heat for passive heating.

The present invention relates to a device comprising at least one tank (1), at least one phase change material PCM (2) that is liquid (200) / solid (201) contained in this tank (1), and at least one compact heat exchange system (4) inside the tank, which heat exchange system uses a method for detaching the solid phase change material (201) from the surfaces of the heat exchange system (4) by active or passive heating means, or mechanical means, or pneumatic or hydropneumatic inflation means, or means for treating the surface of the heat exchange system (4) chosen specifically according to the properties of the phase change material (2) used, which device is characterised in that the maximum volume footprint dedicated to the heat exchange system (4) is designed so as to be much lower, in a ratio at least equal to 1:3, than the volume footprint dedicated to the storage capacity, and in that the phase change material (2) moves in its liquid (200) or solid (201) forms within the tank (1), whereby the suspended solid phase (201) must free up the space near the heat exchange surface (4) so that a new liquid volume (200) can be in contact for production, latent storage and thermal energy restitution in industrial and commercial applications.

The invention discloses a mobile power van which comprises a compartment installed on a van body, the compartment comprises an outer wall and an inner wall arranged on the inner side of the outer wall, an interlayer space is formed between the outer wall and the inner wall, and a multi-compartment assembly is arranged in the interlayer space; the compartment space is arranged between the outer wall and the inner wall of the compartment, the multi-compartment assembly is divided into a plurality of compartments through airtight flexible films, each compartment is filled with friction particles, the compartment space is arranged between the outer wall and the inner wall of the compartment, the multi-compartment assembly is divided into the plurality of compartments through the airtight flexible films, and the friction particles are filled in the compartments. The friction particles can relatively move to generate friction heat and micro electric energy in the driving vibration process of a vehicle, so that passive heating is realized by utilizing inherent mechanical energy of the vehicle, the problem that the energy consumption is up to 50-60% due to the fact that active heating depends on a vehicle-mounted power supply in the prior art is solved, the heating energy consumption is remarkably reduced by 15-25%, and the heating efficiency is improved. And the power endurance time of the mobile power supply vehicle in an extremely cold environment is prolonged.

A semiconductor processing equipment and its multi-zone heating plate and multi-zone temperature control driving method, by setting a current limiting element to communicate the heating sheet in different heating zones of the multi-zone heating plate of the semiconductor processing equipment, each heating sheet will experience active heating operation and passive heating operation, each heating sheet will be applied with active heating power and at least passive heating power, by controlling the proportion of active heating power and passive heating power on the heating sheet, the sum of active heating power and all passive heating power applied to the same heating sheet is equal to the predetermined heating power of the heating sheet, finally realizing independent temperature control of each heating sheet, greatly reducing the maximum instantaneous heating current, reducing the instantaneous heating power and current of each heating sheet, the heating sheet is not easy to cause material cracking due to frequent and rapid heating and cooling, and the power and current level of the corresponding switch is also reduced.

The application relates to a defrosting system and a refrigerator, the defrosting system comprising a heating module, a heat exchange module, a detection module and a control module; the heat exchange module comprises a heat exchange pipeline and a damper, the heat exchange pipeline comprises a first air vent and a second air vent, the first air vent is arranged in an evaporator chamber, the second air vent is arranged in a compressor chamber, and the damper is arranged in the heat exchange pipeline; the heating module comprises a passive heating device, the passive heating device is arranged on the evaporator; the detection module is used for detecting the frost thickness of the evaporator; the control module is configured to control the refrigerator to enter a defrosting mode when the frost thickness of the evaporator is greater than or equal to a frost thickness threshold value; in the defrosting mode, the damper is opened, the compressor chamber is communicated with the evaporator chamber, and the evaporator is heated by the heat stored by the passive heating device and the heat in the compressor chamber. Through the application, the problem of large energy consumption of the traditional defrosting mode is solved.