88results about How to "Prevent heat leakage" patented technology

A medical, electrically powered thermal cover for fitting predominantly the trunk and head of a person experiencing or potentially experiencing traumatic or cold-exposure hypothermia. The thermal cover encases all of the torso and neck, and portions of other body areas. Heating may be distinctly non-uniform, being applied to the body surface only in special regions where the body's capacity for heat uptake may be relatively high. In sum, the system may monitor deep body core temperature, direct heat to the body core where it may be most needed, and controls therapy over time to restore normothermia.

An image forming apparatus capable of minimizing a temperature rise of a cover by substantially preventing heat emission from a fusing device to an outside is disclosed. The image forming apparatus includes a main body, a fusing device mounted in the main body, the fusing device having an outlet to discharge paper, an opening/closing member opening and closing the outlet of the fusing device, a cam member moving the opening/closing member between a first position in which the opening/closing member closes the outlet to prevent heat in the fusing device from being emitted through the outlet and a second position in which the opening/closing member opens the outlet to permit the paper to pass through the outlet, a driving part rotating the cam member, and a control unit controlling the driving part to determine a rotational position of the cam member.

A tank and method for containing a cryogenic liquid in which a purge gas is introduced into an insulation space defined between an outer vessel and an inner vessel to contain insulation material. The inner vessel is used to contain the cryogenic liquid. The purge gas can be cryogenic vapor evolved from the liquid and routed into the insulation space. Control of the purge gas within the insulation space can be provided by a programmable logic controller in which purge gas is vented from the insulation space should the pressure be indicative of a leak within the inner vessel and purge gas is introduced into the insulation space should the pressure be below the ambient to maintain a positive purge gas pressure. An adsorbent bed can also be located within the insulation space to adsorb any moisture.

The invention provides a phase-changing heat accumulation floor heating terminal device pertaining to building heating technique field. The invention employs phase-changing material as heat storage medium for heating. The device, from above to below, includes a floor decoration layer, a phase-changing material layer, an air duct, a radiation protection film, a thermal insulation layer and a floor base layer in turn; keels are arranged between the floor decoration layer and the floor base layer, at least a heat supply waterpipe or a electrical heating film are buried in the phase-changing material layer between adjacent keels; a wind gap is arranged at both ends of the air duct to communicate with indoor air. The phase-changing material supplies heat for indoor heating by heat conduction upwards and convection current, meanwhile heat supply of the phase-changing material is adjusted by air duct and indoor aeration speed, which further regulates and controls heat supply speed. The invention resolves defects of discommodity of heat supply speed adjustment of phase-changing floor energy storage mode, finity of phase-changing material availability, and the invention effectively decreases thermal transmission damage of floor heating downwards.

A thermoelectric nanowire array with a low heat leakage and a manufacturing method thereof are described. Nanowire array units separated from each other are formed on a substrate, and an air wall is formed at a region on the substrate free of the nanowire array units. Or, a polymeric material having a low thermal conductivity is combined with a template material so as to form a composite template structure for nanowires to deposit therein. With the design of the air wall or the composite template structure, the thermal reflow phenomenon of the thermoelectric nanowire array is avoided, thereby greatly improving a thermal dissipation efficiency of the thermoelectric nanowire array.

The invention belongs to the technical field of superconducting power application, and discloses a refrigerating system of a low-temperature superconducting magnet. The refrigerating system comprises a cold shield, a lead cooling channel, a cold shield cooling channel, a first liquid helium input opening, a first helium output opening, a helium tank, a liquid helium input pipe and a helium output pipe; the cold shield is arranged outside a low-temperature superconducting coil; the helium tank is arranged between the cold shield and the low-temperature superconducting coil and does not make contact with the cold shield and the low-temperature superconducting coil; the liquid helium input pipe and the helium output pipe are both connected with the helium tank; liquid helium is injected into the helium tank from the first liquid helium input opening through the liquid helium input pipe; helium volatilized from the helium tank is output from the first helium output opening through the helium output pipe; the lead cooling channel is connected between the helium output pipe and a superconducting current lead and is used for guiding cold to cool the superconducting current lead; the cold shield cooling channel is connected between the helium output pipe and the cold shield and is used for conducting cold to cool the cold shield. Therefore, volatilization of liquid helium can be effectively reduced, and the risk of quenching of the low-temperature superconducting magnet is reduced.

A heat dissipation structure includes a main body. The main body has a chamber. The chamber has an evaporation section, a condensation section, a first backflow section and a second backflow section. The evaporation section and the condensation section and the first and second backflow sections communicate with each other. A junction between the first and second backflow sections is coated with a heat insulation coating. A working fluid is filled in the chamber. By means of the heat insulation coating, the heat leakage between the evaporation section and the condensation section can be avoided. In this case, the vapor-liquid circulation of the working fluid in the heat dissipation structure can be continuously successfully performed.

A loop heat pipe structure includes a transport pipe, an evaporator, a first wick layer, a second wick layer, and a plurality of grooves. The transport pipe communicates with the evaporator. The evaporator has a bottom and internally defines a first chamber and a second chamber, and has a working fluid filled therein. The first wick layer is located on the bottom, and the second wick layer is located on and covers the first wick layer. The grooves can be selectively provided on the first wick layer or the bottom. The first and second wick layers are so designed that the situation of very high vapor pressure would not occur in the second chamber, enabling the loop heat pipe structure to have upgraded heat dissipation efficiency.

The invention relates to an integrated preparation technology of a loop heat pipe evaporator, which is realized through the following steps: selecting an evaporation cavity, removing an oxidation film on the inner surface of the evaporation cavity; adding mixed powder of porous wick sintered body powder and a pore creating material, inserting a cylindrical liquid storage cavity mold into the mixed powder, determining the insertion depth as per the size of the liquid storage cavity, compacting the mixed powder between the evaporator and the liquid storage cavity mold, putting the evaporation cavity into a sintering furnace for sintering, drilling a plurality of steam passages along the inner wall of the evaporation cavity by means of a bit after sintering and cooling, and taking out the liquid storage cavity mold, so as to obtain an integrated loop heat pipe evaporator. The porous wicks are directly sintered in the evaporation cavity in an enclosed manner, as a result, not only are theporous wicks tightly combined with the wall of the evaporation cavity to avoid problems of heat leakage or steam counterflow, but also the sintered porous wicks can be used directly to avoid problemsof the porous wick breakage brought by secondary machining and the requirement for high accuracy. Lower strength is allowed to realize high porosity factor, thereby facilitating enhancement of the suction force of the porous wicks.

The invention provides a low-temperature liquid hydrogen pump, which comprises an electric motor (1), a drive mechanism (2), a working cylinder (3) and a first piston (4) arranged in the working cylinder (3). The low-temperature liquid hydrogen pump is characterized in that: the electric motor (1) is an iron core-free electric motor, and comprises a stator winding formed by pouring an epoxy material and a copper coil; and the shrinkage of the epoxy material in liquid hydrogen is 0.3 to 0.5 percent, so that the liquid hydrogen pump can be impregnated in the liquid hydrogen for work. In addition, the invention also provides the use of the low-temperature liquid hydrogen pump in the delivery of the liquid hydrogen.

The invention discloses an energy-saving industrial oven and relates to the field of machinery. The energy-saving industrial oven comprises a shell, an oven door, a circulating fan, electrical heating elements and a temperature controller; the oven door is movably hinged to the shell, the circulating fan is arranged at the bottom of the shell, the electrical heating elements are electrically connected with the temperature controller and are arranged on inner walls on two sides of the shell, air flow pipelines are further arranged on the inner walls on two sides of the shell, the diameter of each air flow pipeline ranges from 1mm to 2mm, and a two-point lock is arranged on the oven door. By the energy-saving industrial oven, heat can be effectively uniformly transferred to a material to be heated, and the uniform heating of the material is guaranteed; the oven door and the shell are locked in a two-point locking mode, so that the oven door and the shell can be firmer in contact, and heat leakage caused by deformation generated due to higher temperature is avoided.

The invention discloses a self-grinding gas pipeline seal seat valve for high temperature and dust environments. The self-grinding gas pipeline seal seat valve comprises a valve casing body, a lifting mechanism, a suspension mechanism, a rotation driving mechanism, a sweeping mechanism, a valve core and a seal ring; the lifting mechanism is connected with a valve rod; the valve rod is connected with the suspension mechanism; the lower part of the suspension mechanism is provided with the rotation driving mechanism; the lower part of the rotation driving mechanism penetrates through the valve casing body through a rotary valve rod and is connected with the valve core; the seal ring is arranged at an air inlet in the lower part of the valve casing body; the sweeping mechanism is arranged at the side wall of the valve casing body; a control mechanism is connected with the lifting mechanism, the rotation driving mechanism and the sweeping mechanism. The problem of the seal stop of a valve body under the high temperature and dust environments is solved, so that the seal valve is prolonged to 11 thousand times of opening and closing from several times after which the seal valve can lose efficacy after being opened and closed originally; moreover, the self-grinding gas pipeline seal seat valve disclosed by the invention has an excellent seal effect; after the self-grinding gas pipeline seal seat valve is closed, zero leakage is realized; the equipment replacing frequency is reduced; production can be smoothly performed; the self-grinding gas pipeline seal seat valve is worthy of being applied and popularized.

In tubular portion of a tank, slits are formed in each side face of chambers or across all side faces of the chambers. For partition plates that are to be inserted from the slits, groove portions in which the partition plates are fitted are formed by cutting portions to which the partition plates butt. The slits are formed in the chambers at positions relatively shifted from each other in a direction in which tubes are layered. This structure guarantees that, in the tank for a heat exchanger, bypass leakage of a heat exchange medium between sub-chambers is prevented from occurring when the partition plates are inserted in the tank from the slits provided on the tank side faces. Further, the tank can maintain required strength even if the slits are formed in it.

An oven is provided. The oven includes a block sealing a gap between a plate coupling portion and a coupling portion of a counterpart. The oven includes the plate coupling portion for coupling cavity plates to a front plate. The plate coupling portion has a shape formed by bending a front side of the cavity plates to cover the front plate. The oven includes a unit support and a unit fixing portion. The unit support is formed on cavity plates to support a chamber unit, and the unit fixing portion fixes the chamber unit to the cavity plates.

A superconduct magnet contactless power supply device is provided. An output terminal of an alternating current power supply is serially connected with a compensation capacitor and then connected withone end of a primary winding. the other output of AC power supply is connected to the other end of primary winding, the primary winding wound by Leeds wire is arranged on the top surface of cryogenicvessel, the two ends of secondary winding wound by superconducting wire are connected with superconducting magnet load through superconducting bridge respectively, and the turns ratio of primary winding to secondary winding is greater than 1; The primary winding and the secondary winding are respectively wound on a disk-shaped coil skeleton, and the secondary winding and the coil skeleton, the superconducting bridge and the superconducting magnet load are all packaged in a cryogenic vessel. The invention solves the problems of large heat leakage of the lead wire, low efficiency of the low-temperature system, easy to induce quenching and the like existing in the contact power supply mode of the external driving power supply, and has the advantages of simple structure, high transmission efficiency, large working air gap and the like.

The invention provides a repairing method of an inner heat insulating layer. By trimming the damaged portion of the inner heat insulating layer, machining the to-be-repaired contact face of the innerheat insulating layer, machining the inner heat insulating layer for repairing and filling, performing surface treatment, using a gap heat insulation material to perform gap filling, adhering a sealing heat insulation pad to the joint position of the to-be-repaired surface, and adhering two-side polytetrafluoroethylene to treat varnished glass cloth and the like to achieve repairing of the inner heat insulation layer. According to the repairing method of the inner heat insulating layer, repairing is convenient, repairing can be performed just trimming the inner heat insulation layer at the damaged position, it is not needed to disassemble and replace a whole heat insulating module, and therefore influences by devices in equipment are avoided, and the repairing difficulty and the repairingworkload are reduced.

The invention discloses a novel industrial oven and relates to the field of machinery. The novel industrial oven comprises an oven body, an oven door, a circulating fan, electric heating components and a temperature controller, wherein the oven door is movably connected with the oven body, the circulating fan is arranged at the bottom of the oven body, the electric heating components are electrically connected with the temperature controller and are arranged on the inner wall of two sides of the oven body, the inner walls of two sides of the oven body are provided with airflow pipelines in the diameter of 1-2mm, and the oven door is provided with a two-point lock catch. The novel industrial oven can effectively transfer heat to materials to be heated uniformly, uniform heating of the materials can be ensured, and the oven door and the oven body are locked in a two-point locking way, so that the oven door and the oven body more firmly contact, and heat leak caused by deformation due to high temperature is avoided.

The invention discloses a superfluid helium Dewar low-temperature constant-temperature testing device. The device comprises a flange plate, an outer cylinder body, an inner cylinder body and a low-temperature pipeline system, the inner cylinder body is arranged in the outer cylinder body, an upper port of the outer cylinder body and an upper port of the inner cylinder body are connected in a sealed mode through the flange plate, four hanging rods are perpendicularly connected to the end cover face of the bottom of the flange plate, and a liquid nitrogen cold shield is arranged between the outer cylinder body and the inner cylinder body; the low-temperature pipeline system comprises a distribution valve box, a liquid nitrogen cold shield constant-temperature loop, a liquid helium inner barrel precooling cooling branch, a liquid helium inner barrel constant-temperature branch and a nitrogen vacuum pressure reduction branch. The superfluid helium Dewar testing device disclosed by the invention is good in space utilization rate and small in heat leakage, the heat leakage of the superconducting cavity during each test is reduced, the operation difficulty is simplified, and the testing efficiency is improved.

The invention discloses a vacuum degree detection method for a vacuum insulated storage tank. The vacuum degree detection method for the vacuum insulated storage tank comprises the following steps that the temperature of the outer surface of a heat insulating material is detected; a vacuum degree numerical value in a vacuum interlayer of the vacuum insulated storage tank to be detected is obtainedaccording to the relationship between the temperature of the outer surface of the heat insulating material and the vacuum degree in the vacuum interlayer; or a temperature threshold is determined according to the relationship between the temperature of the outer surface of the heat insulating material and the vacuum degree in the vacuum interlayer, the obtained temperature is compared with the temperature threshold, and a result is output. The invention further discloses a vacuum degree detection device for the vacuum insulated storage tank. According to the vacuum degree detection method forthe vacuum insulated storage tank, the method that the temperature of the outer wall surface of the multi-layer heat insulating material in the insulated storage tank indirectly represents the vacuumdegree in the insulated storage tank is adopted so that the vacuum degree in the insulated storage tank can be conveniently and accurately detected; and the method is simple in operation, does not need to use an expensive vacuum gauge, avoids additional heat leakage caused by the installation of the vacuum gauge, and can realize remote monitoring at the same time.

According to a manufacturing method of a heat flux sensor, the heat flux sensor is sandwiched between a heater plate and a cooling unit. The heater plate is disposed on the first surface of the heat flux sensor, and the cooling unit is disposed on the second surface of the same. A heat radiation measurement plate is disposed on a surface of the heater plate opposite to the surface on which the heat flux sensor is disposed. According to this configuration, the temperature of the heater plate is controlled in an inspection process such that the heater plate is kept at an ambient temperature. This makes it possible to stabilize the temperature of the heater plate in a short time.

The present disclosure provides a cold firework spurting apparatus, comprising: a feeding device; a conveying device; a heating mechanism; and a spurting device configured to ignite and spurt the metal powder heated by the heating mechanism, wherein an output end of the feeding device is open to the conveying device and an output end of the conveying device is open to the spurting device. Accordingly, the metal powder inside the conveying device is continuously heated by the heating mechanism attached to the conveying device during the conveying process such that the metal powder is constantly heated during the conveying process so as to form the metal powder ignited at high temperature. The ignited metal powder at high temperature is led and spurted outwards by means of an air flow formed by the spurting device so as to form a spurting effect of cold firework.

A bread maker having a main body, an oven accommodated in the main body, a baking tray provided inside the oven, and a door rotatably connected to the main body to open and close the oven, the bread maker including a sealing part on an inside of the door to prevent leakage of heat from the oven, and a rib extending from the baking tray to contact the sealing part. The sealing part of the door contacts a rib formed on the baking tray when the door is closed so that the sealing part does not protrude into the oven, which prevents the sealing part from being damaged or deformed by an external force, and allows the door to be manufactured using a simple assembling process that increases productivity. The bottom of the oven includes a protuberant part that minimizes the effects of an external force.