111results about How to "Meet heat transfer needs" patented technology

The invention relates to a proton exchange membrane fuel cell metal bipolar plate, which consists of a cathode monopolar plate and an anode monopolar plate made of sheet metal, wherein a flow passage of the monopolar plates consists of a flow field flow passage, a distribution flow passage and an inlet-outlet passage, and the proton exchange membrane fuel cell metal bipolar plate is characterized in that the distribution flow passage is a point-like flow passage, the point-like flow passage consists of unconnected lug bosses raised towards the front side of the monopolar plates, the back sides of the lug bosses are provided with steel pits, the steel pit on the back side of the lug boss on the cathode monopolar plate is staggered with the steel pit on the back side of the lug boss on the anode monopolar plate, and the front part and the back part of the steel pits are overlapped relatively to form continuous water flow distribution flow passages which are connected in series. The proton exchange membrane fuel cell metal bipolar plate has the advantages of thin thickness for the manufactured bipolar plate, strict separation of fluid, good fluid distribution, light weight, simple processing and low processing cost; besides, the bipolar plate has high effective utilization area and good fluid resistance distribution evenness, and can satisfy the needs of different battery heat exchanges.

The invention discloses a cooling system and method of an airborne heating element based on air expansion refrigeration, and belongs to the field of airborne equipment cooling. The cooling system comprises a high heat-flow heating element spray cooling circulation subsystem, an air expansion refrigeration circulation subsystem and a regenerator (7), wherein the high heat-flow heating element spray cooling circulation subsystem comprises a buffer tank (8), a circulation pump (9), a filter (10), a flow regulating valve (11), a spray chamber (14) and a bypass valve (15); the air expansion refrigeration circulation subsystem comprises a primary heat exchanger (2), a secondary heat exchanger (4), a water separator (5), a turbine (6) and a fan (16). The system can achieve rapid cooling of high heat-flow heating element, and achieve the purpose of circulation cooling for multiple times through the regenerator; an intermediate regenerator structure makes full use of the characteristics of large working time intervals of the heating element and large phase change latent heat of phase change materials, greatly reduces the volume of system equipment, and meets the requirements of airborne equipment.

The invention discloses a cooling system and method of airborne heating elements based on evaporative refrigeration, and belongs to the field of cooling airborne equipment. The cooling system comprises a spray cooling cycle subsystem of high heat-flow heating elements, an evaporative refrigeration cycle subsystem, and a cold accumulator (5) for connecting the spray cooling cycle subsystem and the evaporative refrigeration cycle subsystem, wherein the spray cooling cycle subsystem of high heat-flow heating elements comprises a buffer tank (6), a circulating pump (7), a filter (8), a flow regulating valve (9), a spray cavity (12) and a bypass valve (13); the evaporative refrigeration cycle subsystem comprises a condenser (1), a heat regenerator (3), an expansion valve (4) and a compressor (14). Through adoption of the cooling system, the rapid heat dissipation of the high heat-flow heating elements can be realized, and the purpose of repeated circular heat dissipation is achieved through the cold accumulator; besides, the cold accumulator is arranged in the middle, the working time intervals of the heating elements and the characteristic of high latent heat of phase-change materials are fully utilized, so that the volume of the equipment of the system is greatly reduced, and the requirements of airborne equipment are satisfied.

The invention discloses a control method of an air conditioner, wherein the control method is applied to the air conditioner provided with two air outlet. The control method comprises the steps: the indoor environment temperature, the set temperature and the operation mode of the air conditioner are obtained; whether the operation mode is a first preset mode or not is judged; when the operation mode is the first preset mode, according to the indoor environment temperature and the set temperature, a first target state of the first air outlet, a second target state of the second air outlet and afirst rotating speed of an indoor fan are determined; and according to the first target state, a first air guiding plate is controlled to operate, according to the second target state, a second air guiding plate is controlled to operate, and according to the first rotating speed, the indoor fan is controlled to operate. The invention further discloses a control device of the air conditioner, theair conditioner and a readable storage medium. The air conditioner, the control method and device thereof, and the readable storage medium aim to ensure that the air conditioner provided with the twoair outlets can meet the heat exchange amount needed by the indoor space, and meanwhile ensure the operation stability of the air conditioner.

The invention relates to a loop gravity-assisted heat pipe heat transfer device which mainly comprises an evaporator, a condenser, a steam pipe and a liquid pipe, wherein the evaporator is pipe-shaped, the evaporator is sealed and is filled with a working medium, an inlet of the steam pipe slightly extends into the top of the evaporator, and an outlet of the liquid pipe passes through the top of the evaporator and extends to the bottom of the evaporator; and an outlet of the steam pipe is communicated with the upper part of the condenser, and an inlet of the liquid pipe is communicated with the lower part of the condenser. The loop gravity-assisted heat pipe heat transfer device disclosed by the invention has excellent heat transfer performance and application expandability, can avoid installation difficulty, meets heat transfer requirements of vacuum tube heat collectors with any sizes and has the advantages of reliable structure and manufacturing process and lower cost.

The invention discloses an automobile heat pump system and a control method. The automobile heat pump system comprises a warm air core body and an automobile equipment refrigeration unit. The automobile equipment refrigeration unit comprises a first compressor, a first condenser, a first evaporator and an automobile equipment radiator set. A heat medium of the warm air core body exchanges heat with a refrigerant in the first condenser to be heated and then flows back to the warm air core body; cold end air of the warm air core body is used for heating air of a passenger compartment; a refrigerant exchanges heat and is cooled in the first condenser and then flows into the cold end of the first evaporator; a cold medium of the automobile equipment radiator set enters the hot end of the firstevaporator, exchanges heat with a refrigerant for cooling and then flows back to the automobile equipment radiator set to be used for heat dissipation of automobile equipment. A refrigerant exchangesheat in the first evaporator, is heated and then flows into an inlet of the first compressor. Motor waste heat, battery waste heat and external air heat are utilized to the maximum extent, and an automobile air conditioner does not need to switch heating through a refrigerant loop; the development cost and the automobile heating power consumption are reduced.

The invention discloses a corrugated fin heat exchange structure for a mine air cooler and a design method of the corrugated fin heat exchange structure. The corrugated fin heat exchange structure comprises multiple rows of heat exchange pipes and a corrugated fin. The corrugated fin is a sawtooth-shaped corrugated plate. The heat exchange pipes in the two rows of adjacent heat exchange pipes are staggered. The corrugated fin comprises a plurality of corrugated fin units. Each corrugated fin unit comprises two symmetric strip-shaped plates. A heat exchange pipe laying plate for allowing one row of heat exchange pipes to be laid is defined by three adjacent strip-shaped plates. Heat transfer enhancement structures are arranged on the outer sides of the heat exchange pipes. The design method comprises the following steps that first, the size parameters of the corrugated fin are determined; second, the distances between any two adjacent heat exchange pipes are determined; and third, the size parameters of the heat transfer enhancement structures are determined. The corrugated fin heat exchange structure is reasonable in design, simple and convenient to process and manufacture, and good in using effect. The heat exchange pipes are arranged on the corrugated fin, and the heat transfer enhancement structures are arranged on the outer sides of the heat exchange pipes, so that the heat exchange efficiency can be improved effectively, the size of the mine air cooler can be reduced, and installation and arrangement of high temperature borehole operation places are facilitated.

The invention belongs to the technical field of aerospace testing, provides a scramjet engine fuel gas analysis high-enthalpy sampling probe, and particularly provides a blow-down scramjet engine combustion device and a fuel gas sampling probe for capturing high-enthalpy fuel gas in engine combustor tests.

The invention provides a ring heat exchanger of a sterling heat engine. The ring heat exchanger comprises a ring heat exchanger main body and a plurality of connecting pipes which are arranged at two ends of the ring heat exchanger main body. The interior of the ring heat exchanger is provided with at least two heat exchange channels in a centrosymmetrical distribution manner, and the symmetrical center is the center of the central channel; two ends of each heat exchange channel are respectively provided with a connecting pipe; a heat exchange wall between the heat exchange channels is internally provided with a plurality of heat exchange holes; and heat exchange plates are distributed on the surface of the ring heat exchanger. The ring heat exchanger of the sterling heat engine provided by the invention has the advantages that a plurality of working chambers of each individual heat exchanger of the sterling heat engine are integrated into a whole, and the heat exchanging demands of the working chambers at each thermodynamic process are satisfied; the heat exchange area between the heat exchanger and a heat source is increased effectively, the heat exchange capability is strengthened, and the existing water cooling system can be completely replaced by a wind cooling system; the ring heat exchanger is especially used for a sterling invertible heat engine, the space is utilized fully, and the volume of the whole ring heat exchanger is smaller.

The invention discloses a shell-and-tube heat exchanger suitable for three-fluid heat exchange. The shell-and-tube heat exchanger suitable for three-fluid heat exchange comprises a shell, a first sealing head, a second sealing head, a first fluid heat exchange assembly, a second fluid heat exchange assembly and a third fluid heat exchange assembly, wherein the shell is isolated through a vertically-arranged third tube plate to form a first inner cavity and a second inner cavity; the first sealing head is arranged at one end of the shell, and a first tube box is formed in the first sealing head; the second sealing head is arranged at the other end of the shell, and a second tube box is formed in the second sealing head; the first fluid heat exchange assembly is arranged in the first inner cavity, and comprises a third tube box, a first heat exchange tube communicating the third tube box with the first tube box, a fourth tube box, and a second heat exchange tube communicating the fourth tube box with the first tube box, and a first fluid flows to exchange heat in the first heat exchange tube and the second heat exchange tube; the second fluid heat exchange assembly comprises concentric tubes arranged in the shell and communicating with the second tube box and the second inner cavity respectively, and a second fluid flows to exchange heat in the concentric tubes; and in the third fluid heat exchange assembly, a third fluid flows to exchange heat in the first inner cavity of the shell. The shell-and-tube heat exchanger suitable for three-fluid heat exchange, which is disclosed by the invention, is reasonable in structural design; and the shell-pass fluid can exchange heat with the two tube-pass fluids simultaneously, thus a multi-fluid heat exchange need is met, and the heat exchange efficiency is high.

The invention discloses a novel heat exchanger core, and belongs to the technical field of machine design. The novel heat exchanger core comprises n first fluid heat exchange plates and m second fluid heat exchange plates. The n first fluid heat exchange plates and the m second fluid heat exchange plates are arranged alternately. The first fluid heat exchange plates carry first heat exchange fluid, and the second fluid heat exchange plates carry second heat exchange fluid. Etching channels are etched in the first fluid heat exchange plates and the second fluid heat exchange plates correspondingly. Each etching channel comprises a heat exchange channel and a guide channel. Each heat exchange channel comprises straight channel bodies and oval channel bodies which are arranged alternately, wherein the straight channel bodies communicate with the oval channel bodies, and the long axes of the oval channel bodies and the center axes, in the fluid flowing direction, of the straight channel bodies are located on the same straight line. The guide channels are connected with the heat exchange channels and extend to the edges of the plates. According to the heat exchanger core, a gradual-contracting and gradual-expanding structure is adopted so that the heat exchanger core can adapt to a using condition with low working medium cleanliness, and the requirement for the cleanliness of fluid working media is lowered.

The invention discloses an overcooling heat exchange system of refrigerants under the air conditioner heating circulation and an air conditioner. The overcooling heat exchange system comprises an overcooling heat exchanger provided with a first refrigerant pipe and a second refrigerant pipe, the first end of the first refrigerant pipe is connected with an indoor heat exchanger, the second end of the first refrigerant pipe is connected with an outdoor heat exchanger through a first branch, the first end of the second refrigerant pipe is connected with the second end of the first refrigerant pipe through a second branch, the second end of the second refrigerant pipe is connected with a compressor, and the second branch is provided with a cooling device for cooling the corresponding internalrefrigerant. During heating, the refrigerant of the second branch enters the second refrigerant pipe after being cooled by the cooling device, the refrigerants of the two pipes have the temperature difference and can exchange heat with each other again, so that the secondary overcooling purpose is achieved, the temperature difference between the refrigerants and the outdoor low-temperature environment is enlarged, the heat exchange efficiency is improved, and the problems that in the prior art, during heating of the air conditioner, heat exchange of the refrigerants indoor is insufficient, sothat after the refrigerants undergo throttling and cooling, the temperature difference between the refrigerants and the outdoor low-temperature environment is a little low, the evaporation heat exchange effect is poor, and the heat exchange requirement during heating circulation can not be effectively met are solved.

The invention discloses a heat transfer enhancing anti-corrosion coating material and a preparation method thereof. The heat transfer enhancing anti-corrosion coating material comprises the componentsin percentage by mass: 20-60% of a binder, 5-30% of a high-thermal conductivity material, 5-30% of a high-emissivity material, 2-20% of a heat-resistant anti-corrosion pigment, 0.5-5% of an additiveand 0-50% of a dispersion medium. The coating material is prepared by a special preparation method, and is better in homogenization and stable in storage. The coating material not only has excellent heat resistance, but also has a good heat transfer enhancement function; and the coating material is dense, has good corrosion resistance to the corrosive atmosphere and has good adhesion to metal substrates.

The invention discloses an oil-gas mixture pump-purpose double mechanical seal device which can be used for a long term under superproportional gas-oil multiphase environment. The device comprises a set of internal mechanical seal and a set of external mechanical seal which are arranged between a pump body and a pump shaft and separate a cavity between the pump body and the pump shaft into a sealing cavity and a liquid sealing cavity; each set of mechanical seal comprises a transmission set, a moving ring and a static ring; the transmission set is fixed on the pump shaft; the moving ring is fixed on the transmission set; the static ring is fixed on the pump body; the transmission set is processed with an axial spring hole; one end of a spring in the spring hole pushes against the bottom of the spring hole, and the other end thereof pushes against the bottom of the moving ring, thereby causing the sealing surface of the moving ring to be tightly clung to the sealing surface of the static ring; the upper part and the lower part of the pump body are respectively provided with a liquid inlet and a liquid outlet which are communicated with the liquid sealing cavity; the static ring of the internal mechanical seal is provided with at least one through groove and at least one semi-circular groove at the inner edge of the sealing surface; and the external circumferential surface of the moving ring of the external mechanical seal is provided with pumping thread. The device is mainly used in a marine oil-gas mixture pump.

A box-shaped stacked heat exchanger with one of mediums interchanging heat provided with multiple flow channels comprises a heat exchange core and is characterized in that the number of the flow channels of one heat exchange medium is increased through the mode of increasing heat exchange plates and heat exchange devices, under the action of corner hole backing plates, the heat exchange medium can flow in the same direction in the heat exchange devices of the multiple adjacent flow channels at the same time in a parallel-connection mode, but the other heat exchange mediums interchanging heat still flow in the original alternate-heat-exchange single-layer flow channels and the original alternate-heat-exchange heat exchange devices. In the heat exchange core, the number of the flow channels of one of the heat exchange mediums is larger than the number of the flow channels of the other heat exchange mediums, so that alternate heat exchange between the walls of the single-layer flow channels and the walls of the multilayer flow channels through the heat exchange mediums interchanging heat is achieved.

The invention discloses an immersion type liquid-cooled cabinet, which comprises an outer box body and an inner box body, wherein the inner box body is fixed inside the outer box body, the inner box body is loaded with a non-conductive liquid, heat production components and a propeller device are immersed in the liquid, the inner wall of the inner box body is provided with a condenser tube set, afan assembly and an electrical fitting installation interface above the liquid level, the top of the inner box body is provided with a detachable sealing cover, and the top of the outer box body is provided with a reversible upper cover. The heat production components are immersed in the non-conductive liquid, the non-conductive liquid accelerates the flow under the stirring of the propeller device so as to promote the heat dissipation, and the condenser tube and the fan assembly above the liquid level carries out heat dissipation on a gas above the liquid at the same time, so that the combination of the two significantly improves the heat dissipation effect.

The invention discloses a fresh air purifier comprising the following units: a housing; a heat exchange module arranged in the housing, wherein the heat exchange module and the housing enclose to form an air inlet cavity, an air outlet cavity, an air return cavity and a fresh air cavity through a plurality of isolation plates; a first blower and a second blower respectively arranged in the air outlet cavity and fresh air cavity; a filtering module arranged in the air inlet cavity; a first sensor module arranged in the air return cavity, wherein the first sensor module is used for detecting a first dust concentration, a carbon dioxide concentration, a peculiar smell concentration, a temperature and humidity of the return air. The fresh air purifier combines various sensors, and the sensor module is arranged in proper position, thus accurately detecting air parameters; a control method is combined so as to reasonably adjust the indoor air quality, thus satisfying air purifying and heat exchange demands, and improving energy utilization efficiency as possible.

The invention discloses a novel heat exchanger core, and belongs to the technical field of mechanical design. The novel heat exchanger core comprises etching plates, forming plates and partition plates; heat exchange runners are etched on the etching plates, and each heat exchange runner is composed of a direct runner and an oval runner which are alternatively arranged; the direct runners and the oval runners are communicated; the long axes of the oval runners and the central axes, in the liquid flowing direction, of the direct runners are located on the same straight line; the n etching plates and the m forming plates are alternatively arranged, wherein n is larger than or equal to 1, m is larger than or equal to 1, and m and n are both positive integers; the position between the etching faces of adjacent etching plates and the forming plates, the position between the two adjacent forming plates and the position between the etching faces of the two adjacent etching plates are each provided with one partition plate; according to the heat exchanger core, the characteristics of a micro-channel heat exchanger and a plate type heat exchanger are integrated, the use condition that the working medium cleaning degree is not high is met, and the novel heat exchanger core can be particularly suitable for the cooling working procedure of natural gas of an offshore work platform.

The invention relates to a process steam flow control apparatus, comprising a steam dividing cylinder and a plurality of process steam supply units communicated respectively with the steam dividing cylinder; each process steam supply unit comprises a steam supply pipeline communicated with the steam dividing cylinder, first and second pneumatic valves arranged in parallel on the steam supply pipeline, and a time-control switch control box electrically connected respectively to the first and second pneumatic valve, the tail end of the steam supply pipeline is provided with a heat exchanger, and process steam in the steam dividing cylinder is delivered to the heat exchangers after flow is adjusted through the process steam supply units. Compared with the prior art, the process steam flow control apparatus has the advantages that the two pneumatic valves connected in parallel and having different diameters are provided, openings of the two pneumatic valves are intelligently controlled through the time-control switch control box according to actual process needs, and required heat is provided for process water; adjusting precision is high, adjusting flexibility is good, the apparatus has long service life and good stability and reliability.

The invention discloses a vehicle heat exchange system and a vehicle with the same. The vehicle heat exchange system comprises a battery pack heat exchange loop, an electric control motor heat dissipation loop, a passenger compartment refrigeration loop and a passenger compartment heating loop. The battery pack heat exchange loop internally comprises a first heat exchange section provided with a battery pack and a second heat exchange section provided with a battery pack heat exchanger; the electric control motor heat dissipation loop comprises a first heat dissipation section provided with anelectric appliance and a second heat dissipation section provided with a radiator outside the vehicle. The passenger compartment refrigeration loop comprises a refrigerating main circuit provided with a compressor, a first refrigerating branch circuit connected with the battery pack heat exchanger, a second refrigerating branch circuit provided with an evaporator, a third refrigerating branch circuit provided with an external heat exchanger and a fourth refrigerating branch circuit provided with a heat pump heat exchanger. The passenger compartment heating loop is provided with a heater connected with the heat pump heat exchanger. According to the vehicle heat exchange system, the heat exchange efficiency is improved while the vehicle heat exchange requirement is met.