2527 results about "Air door" patented technology

The invention discloses a method for controlling moisture of tobacco shreds at an outlet of a parallel-flow tobacco dryer, and relates to a production control method in the tobacco industry. The method is characterized in that: in a production phase, the required value of the moisture of the tobacco shreds at the outlet is taken as a target, the precedence of control and adjustment is determined according to the opening degree of a moisture draining air door and a hot wind air door, the temperature of hot wind and the temperature of a wall; the overall principle is firstly controlling and adjusting the parameters which have little impact on the internal quality of the tobacco shreds and the smoking and then controlling and adjusting the parameters which have great impact on the internal quality of the tobacco shreds and the smoking; the sequence is as follows: (1) first the opening degrees of the moisture draining air door and the hot wind air door are controlled and adjusted; (2) then the hot wind temperature is controlled and adjusted; (3) and finally the wall temperature is controlled and adjusted. The method for controlling moisture content of tobacco shreds has the advantage that the wall temperature is basically kept constant in the production process, which is beneficial to stabilizing and unifying the inner quality and style of the tobacco products. The method can provide a technical means for individualized production and classification processing of the cigarettes.

The invention aims at providing a vehicle HVAC (high voltage alternating current) air inlet system and a control method thereof; the system can be used for effectively reducing the entry of the external dust, reducing the harmful gas volatilized by interior ornaments in a vehicle, and greatly improving the comfort level of the vehicle. The vehicle HVAC air inlet system comprises an HVAC air inlet, an inner-outer circulation control air door, a servo motor for driving the inner-outer circulation control air door, and a control unit; the HVAC air inlet comprises an outer circulation air inlet and an inner circulation air inlet; the inner-outer circulation control air door is arranged at the inner circulation air inlet or the outer circulation air inlet; and the control unit is connected with the servo motor. The vehicle HVAC air inlet system is characterized in that the control unit is respectively connected with an in-vehicle air quality sensor and an in-vehicle temperature sensor which are mounted in the vehicle as well as an out-vehicle air quality sensor and an out-vehicle temperature sensor which are mounted out the vehicle. The vehicle HVAC air inlet system is low in cost, and the control method thereof is easy to realize and can meet the requirements of human health and comfort level.

The invention discloses an air-cooling refrigerator and a control method thereof. An independent moisture control area is arranged in a refrigeration chamber of the air-cooling refrigerator. Two independent moisture control air path circulating systems are arranged in the moisture control area. One of the independent moisture control air path circulating systems is a refrigeration moisture control air path circulating system, and the other independent moisture control air path circulating system is a freezing moisture control air path circulating system. The refrigeration moisture control air path circulating system comprises a refrigeration moisture control air-supplying air flue, a refrigeration moisture control air-returning air flue, a refrigeration moisture control air-supplying air door and a refrigeration moisture control air-returning air door. The freezing moisture control air path circulating system comprises a freezing moisture control air-supplying air flue, a freezing moisture control air-returning air flue, a freezing moisture control air-supplying air door and a freezing moisture control air-returning air door. The air-cooling refrigerator and the control method thereof have the beneficial effects that switching between the two independent moisture control air path circulating systems is utilized, and different forms of combination and cooperation of the temperatures of all evaporators and the starting time of all the air doors are combined, so that precise adjustment of humidity in the moisture control area is achieved; the humidity adjustment range is wide; and the precise requirements of various types of food for the humidity are met.

The invention relates to a method for controlling an air-cooled refrigerator. The air-cooled refrigerator comprises a cold storage chamber and a freezing chamber; a compressor, an evaporator, a fan motor and a freezing chamber temperature sensor are arranged in the freezing chamber; a cold storage chamber temperature sensor is arranged in the cold storage chamber, and a cold storage air door for controlling the temperature of the cold storage chamber is arranged in an air duct between the cold storage chamber and the freezing chamber; and the freezing chamber temperature sensor, the cold storage chamber temperature sensor and the cold storage air door are connected with a controller of the air-cooled refrigerator. The method for controlling the air-cooled refrigerator comprises the following steps of: acquiring temperatures of the chambers through the freezing chamber temperature sensor and the cold storage chamber temperature sensor, and controlling the compressor, the fan motor and the cold storage air door through the controller to realize synchronization of refrigerating cycles of the chambers, wherein start of the compressor is only controlled by the temperature of the freezing chamber, and operation and stop of the compressor are controlled by the temperature of each chamber. By the controlling method, the start time of the compressor can be reduced, the refrigerating efficiency is improved, and an aim of reducing the operating energy consumption of the refrigerator is fulfilled.

The invention provides a refrigerator improving driving reliability of blower. The refrigerator of the invention comprises a refrigerating chamber provided at the upper part of the refrigerator body, a freezing chamber provided at the lower part of the refrigerator body, a blower conveying cooling air to the refrigerator, a cooling air duct located at the upper part of the freezing chamber and provided with the blower, an air door located at the upper part of the blower for adjusting the supplying of the cooling air conveyed by the blower to the refrigerator, a baffle for rotatably providing the air door in the cooling air duct and controlling the cooling air passing in the cooling air duct; the blower comprises a fan and a fan cover provided around the fan and the blower is provided having tilt from upper part if the fan cover to the left and right directions viewing from the face of the refrigerator body; the cooling air duct has a tilt part at the upper part of the fan; the baffle rotates until the end of the baffle locating at the upper part of the tilt part.

An improved refrigerator with a cool select zone comprises a refrigerating room, a cold room, the cool select zone and a control part. The cool select zone is arranged in the cold room and provided with an air inlet and an air outlet. The refrigerator also comprises an induced duct, one end of which is connected with the refrigerating room and the other end of which is connected with the air inlet of the cool select zone; as well as an air quantity control structure connected with the induced duct. The control method for the refrigerator comprises: when T is more than Ts-0.5, a controller opens an electric air door to lead cooling air and the on-state of an evaporator fan is retained, if the fan stops, the fan is forcedly started to speed up the flow of cooling air and lower the temperature; when T is less than Ts-0.5, the controller closes the electric air door, the fan recovers to the normal operating state for heat preservation. The refrigerator can conveniently set the temperature to satisfy the fresh-keeping requirements of most daily food; moreover, the refrigerator has the advantages of simple structure, high speed of temperature change, wide regulation range, no remaining frost formation, etc..

This invention discloses a sort of refrigeration which has three gates and an evaporation, it consists of the chest body, the evaporator, above the chest body there has the folio refrigeration chamber and the safe, below the chest body there has the poikilothermal chamber. This poikilothermal chamber has the configuration that it likes a whole big drawer or it has the big airtight space configuration of the airproof gate and it only fitted an evaporator in the safe. They use the common evaporator in the working of the refrigeration, the deepfreeze, the change of temperature. It adjusts the intake of the indoor space to reach the needed temperature by the fan, the air line and the air door; thereby it saves an evaporator which can change the temperature. Especially the poikilothermal chamber become an alone chamber, it can realize the function of the change of temperature completely and independently. The poikilothermal chamber can progress the continuous regulation from the deepfreeze to the soft refrigeration then to the refrigeration, it can realize the conversion between the deep deepfreeze and the deep refrigeration, and it satisfy the request for the user to the big and wide safe.

Provided is a boiler combustion optimization air distribution method based on online model prediction. The method includes: constructing a boiler combustion optimization air distribution model by employing an improved BP neural network algorithm and model online update calculation; and performing optimization calculation on parameters such as the optimal oxygen amount, the primary air amount, each secondary air door and a burnout air door etc. with the combination of an adaptive genetic algorithm and dynamic optimization boundary so that a multi-target function constructed by the boiler efficiency and the pollutant discharge capacity reaches the optimal combustion range.

The present invention provides a cleaning control method for an air conditioner, a cleaning control device for the air conditioner, and an air conditioner. The air conditioner includes an ozone generator, an indoor heat exchanger, a damper, and an indoor fan. The cleaning control method includes: when When the air conditioner enters the automatic cleaning mode, the ozone generator is activated to generate ozone for ozone sterilization; when the ozone sterilization reaches a first preset time, the air conditioner is controlled to work in the heating mode to Raise the temperature of the indoor heat exchanger; when the temperature of the indoor heat exchanger reaches a first preset temperature, control to perform heating and sterilization at the first preset temperature. Through the technical solution of the present invention, the cleaning and sterilization effect of the air conditioner can be effectively improved, and thorough and effective sterilization can be realized, thereby improving the user's comfortable experience.

The embodiment of the invention discloses a control method, device and system of a vehicle air conditioner and a vehicle. The control method comprises the steps that parameters of the environment of the vehicle, a vehicle running parameter and air conditioner parameters set by a user are acquired; the environment parameters comprise outside temperature, inside temperature, inside humidity, outsideair quality, air conditioner water temperature and sunlight radiation strength; the vehicle running parameter comprises engine rotation speed; the air conditioner parameters set by the user comprisetarget temperature and a mode type; the working state of the air conditioner is determined according to at least one of the environment parameters, the vehicle running parameter and the air conditioner parameters; and the working state of the air conditioner comprises the state of an air door motor, the opening of an electric control water valve, the operation time of a compressor, the states of inner and outer circulation motors and the state of a blast capacity tap position. By adopting the control method, convenience for control of vehicle air conditioner can be improved, so that human bodythermal comfort requirements can be met timely by a inside-vehicle temperature field.

The invention relates to an air quantity regulation mechanism, which comprises an air door, a gear and a driving lever. The air door is provided with an air door shaft and an air door blade installed at one end of the air door shaft; the gear is installed at the other end of the air door shaft; and the driving lever is provided with a rack which is meshed with the gear so as to convert the linear motion of the driving lever into the rotary motion of the gear. The air quantity is easy to control by the air quantity regulation mechanism of the invention, air quantity control and reasonable distribution can be realized and the air quantity regulation mechanism has reasonable appearance design and compact and beautiful appearance. The invention also relates to an air channel device with the air quantity regulation mechanism and a refrigerator with the air channel device.

The invention discloses heat pump drying equipment with a dehumidification and humidity elimination switching function and a material drying method. The heat pump drying equipment comprises a heat pump system and a drying workshop, wherein the drying workshop is internally provided with a heat pump host machine room, a return air passage and a drying room; the top of the return air passage is higher than the drying room, and an air outlet communicated with the return air passage is formed in the right side of the drying room; the return air passage is internally provided with a humidity elimination air passage, and the other end of the humidity elimination air passage stretches into the heat pump host machine room; an internal circulation air door is arranged between an exhausting room and the heat pump host machine room, and an exhaust air door is arranged on the side wall of the exhausting room; the heat pump host machine is internally provided with a fresh air passage, a heat recycling device is arranged at the joint of the fresh air passage and the humidity elimination passage, and an internal fresh air door is arranged on the fresh air passage. The heat pump drying equipment with the dehumidification and humidity elimination switching function disclosed by the invention is compact in structure, and is matched with the drying method; optimal operation modes can be selected according to specific conditions, all advantages of each mode are synthesized, the influences of the defects of each mode are reduced through mode switching, the energy consumption is low, and the drying efficiency is high.

The invention relates to an air purification device, particularly used for removing harmful gas in the air and aiming to solve the desorption problem of adsorbent in the air purification device, thereby renewable adsorbent can be utilized to continuously adsorb the harmful gas in the air. The invention adopts the technical means as follows: a heating element is arranged in a main duct near the adsorption unit part and forms a high-temperature region in the main duct; a thermal insulation layer is arranged on the side wall of the high-temperature region; an air door is respectively arranged at both ends of the high-temperature region; an adsorption unit and the heating element are at least arranged in the high-temperature region; a polluted air exhaust port and a circulating air port are respectively arranged at both sides of the adsorption unit; the circulating air port is arranged at the side provided with the heating element; the air inlet end of a pollution discharge fan is communicated with the polluted air exhaust port; the exhaust end is divided into two ways, one way is led to the circulating air port through a circulating air door and a circulating air tube, and the other way is communicated with the outdoors through a pollution discharge air door and a pollution discharge air tube.

The invention discloses an air duct device of a refrigerator and the full-variable-temperature refrigerator. The air duct device comprises a front air duct cover plate, a front foam air duct, a rear foam air duct, two air doors, a rear air duct cover plate and a centrifugal fan assembly, wherein the front air duct cover plate is mounted on the wall of the inner chamber of the refrigerator; the front foam air duct is mounted on the front air duct cover plate; the rear foam air duct is mounted on the front foam air duct; the two air doors are mounted on the rear foam air duct; the rear air duct cover plate is mounted on the front air duct cover plate; an air duct is defined by the front air duct cover plate, the front foam air duct, the rear foam air duct and the rear air duct cover plate in a sealed manner; and the centrifugal fan assembly is positioned in the air duct, and is mounted on the front air duct cover plate. The air duct device and the full-variable-temperature refrigerator can control the storage temperatures of all chambers to achieve the function that the temperatures of all the chambers can be varied arbitrarily, so that the functions of a refrigeration chamber, a freezing chamber and a variable-temperature chamber can be defined according to own requirements by users.

The invention discloses an integral energy-saving type air-conditioning unit in a computer room, which is an energy-saving air-conditioning unit with high precision and high reliability. In the air-conditioning unit, the center of a shell is provided with a clapboard which divides the inside of the shell into an upper chamber and a lower chamber and is provided with an air door capable of being opened and closed; an actuator is connected with the air door to perform opening and closing actions; the inside of the upper chamber is provided with an evaporator blower, an evaporator and a compressor; the top of the shell is provided with an indoor air outlet, and the lateral surface of the shell is provided with an indoor air inlet; the inside of the lower chamber is provided with an air cooled condenser and a condenser blower; and the lateral surface of the shell of the lower chamber is provided with an outdoor air outlet and an outdoor air inlet. The air-conditioning unit integrates the outdoor air cooled condenser, condenser blower, the compressor, the evaporator and the like into a framework, and can realize three refrigeration modes: a mechanical refrigeration mode, a mixed refrigeration mode and a natural cooling mode. When the temperature and the humidity of an outdoor environment are proper, the air-conditioning unit can automatically switch to operate under the mixed refrigeration mode or the natural cooling mode so as to achieve the aim of energy saving.

The invention discloses a drying line of pulp moulding that is based on a frequency-varying speed regulation technique, and a production technique of the drying line, and is applied into a belt drying line with convectional hot air and used for designing a set of automatic controlling systems with optimized efficiency; the invention implements the modeling of complex objects according to the drying property of pulp moulding and different sizes and weights of wet ground papers, adopts a process control technique, the alternate-current frequency-varying speed regulation technique and a modern detecting technique, realizes stepless control of frequency-varying speed regulation of a circulating fan, an electric air door, a dehumidifying fan, a drive motor of conveying chains according to temperature and humidity signal that are detected on the spot, reasonably adjusts the running speed of a conveying belt inside a parching channel, the working temperature of a desiccator in each segment, and the blast volume of hot air and the discharge of water vapor, etc., and forms a reasonable drying curve, thus reducing product deformation to the utmost degree, saving the loss of electricity energy and heat energy to the utmost extent, accelerating parching speed, increasing the yield of the parching production line, and realizing optimal control.

The air exchanger includes air exhaust cavity, air sucking cavity and volute rotating driving mechanism. The air exhaust cavity is provided with volute, eccentric blower and motor, as well as exhaust port to outdoor and one or several exhaust ports to indoor. The air sucking cavity has air sucking port to the outdoor paired with the exhaust port to outdoor and air sucking ports to the indoor paired with the exhaust ports to indoor ,as well as air door for opening and closing the air sucking ports, and is communicated with the inlet port to the volute. The present invention can exhaust stagnant air from indoor and suck in fresh air from outdoor without altering the rotation direction of blower, has high wind pressure, great air exchange amount and high speed, and can realize the air exchange control to single or several rooms.

A cooling apparatus of a cooking appliance including a cabinet having a cooking chamber located therein and an electric component chamber located outside the cooking chamber; a door installed on the cabinet for opening and closing the cooking chamber, and having a suction channel and a discharge channel communicating with the electric component chamber; and an air blower installed in the electric component chamber for sucking air to the inside of the electric component chamber through the suction channel and the discharge channel of the door and discharging the air, so that the external air having a low temperature is directly sucked through the door, cools the electric component chamber, and is then discharged to the outside, thereby increasing cooling efficiency of the door.

The invention provides a U+I type ventilation system for a work surface of top coal caving, which is an improvement of the arrangement of the U type, the U+L type and the E type or B type laneways and the ventilation systems in the prior art. An air intake way and an air return way of the work surface of top coal caving are arranged along a bottom board of a coal bed, and a regulation air door is arranged on the part of the air return way close to a big air return lane to control the reasonable ventilating parameter of the U+I type ventilating system. The invention is mainly characterized in that air exhausting lanes of top boards are arranged in parallel along the air return way with the parallel outward-staggered distance of 0 m to 5 m from the air return way to form the U+I type ventilating system of a one-intake and two-return mode. The invention fundamentally solves the problem of the accumulation of gas and coal dust on the upper section, the upper spatial angle and the gob area of the work surface of top coal caving, in particular the problem of the accumulation of the gas and the coal dust of the upper space of the upper gob area, provides a safe and high-effect ventilating system, and creates an excellent mechanical environment for realizing the exploitation of the top coal caving of small coal pillars and increasing the recovery rate of coal.

The invention discloses an air-conditioner indoor unit and an air outlet control method of an air-conditioner. The air-conditioner indoor unit comprises a shell, an air door assembly, an air wheel system and a heat exchanger. At least one volute is arranged in the shell, and a rotatable flow guide plate is arranged in each volute to define two air channels. Each air channel is provided with an air outlet formed in the outer peripheral wall of the shell, and each air outlet has an air outlet state and a closed state. When parts of air outlets are in the air outlet state, the other parts of air outlets are in the air outlet state or the closed state. The air door assembly comprises a plurality of air doors used for closing all the air outlets. When at least one of the other parts of air outlets is subjected to air outlet-closing switching, the air door and the flow guide plate which correspond to the switched air outlet are not synchronous in movement. The air-conditioner indoor unit can avoid the noise generated when wind impacts the air doors which make the closing movement or opening movement.

The invention provides an air door closing in-place detecting device and a refrigerating plant. The air door closing in-place detecting device comprises a detecting element, a detecting circuit and a controlling element. The detecting element is mounted on an air door and is used for detecting the air door and determining whether the air door is closed in place or not; the detecting circuit is connected with the detecting element and transmits control signals according to detection results of the detecting element; the controlling element receives the control signals outputted by the detecting circuit and controls actions of the air door according to the received control signals. The air door closing in-place detecting device and the refrigerating plant have the advantages that the air door closing in-place detecting device is provided with the detecting element, the detecting circuit and the controlling element, so that the detection rate of anomaly of the air door can be effectively increased, refrigerating equipment such as a refrigerator can be in the designed allowable optimal working state, and the reliability of a product can be effectively improved.

The invention aims to overcome the defects of the existing heating plants, such as a boiler, and to provide a solid energy storage electric boiler and a heat exchanging structure thereof. A heat storage brick is utilized as a heat storage medium for the solid energy storage electric boiler, and a high-capacity heat exchanging structure with a controllable exothermic process. Particularly, the heat exchanging structure comprises a heat storage structure, a heat insulation material layer, a heat insulation wall with holes, a heat exchanger and an outer shell; two ends of the outer shell are provided with air openings; the heat storage structure, the heat insulation wall with holes and the heat exchanger are arrayed in the outer shell; the heat insulation material is placed among the heat storage structure, the heat insulation wall with holes and the outer shell; and the heat exchanging structure also comprises an air door, a fan and a circulation outer air duct.

The invention discloses an air cooled refrigerator. The air cooled refrigerator comprises a refrigerator body and an air duct assembly, wherein the refrigerator body is provided with a freezing chamber liner; the air duct assembly is arranged in the refrigerator body. The air duct assembly comprises a front cover, a rear cover, an axial flow fan and an evaporator, wherein the front cover is provided with a top air supply outlet, a middle air supply outlet and a bottom air supply outlet; the rear cover is arranged at the rear side of the front cover so as to form an air supply cavity between the rear cover and the front cover; the rear cover and the rear side wall of the freezing chamber liner are separated so as to define a heat exchange cavity; the rear cover is provided with an air inlet; the air inlet is respectively communicated with the heat exchange cavity and the air supply cavity; the top air supply outlet, the middle air supply outlet and the bottom air supply outlet are respectively communicated with the air supply cavity; the axial flow fan is arranged at the top part of the rear cover; the evaporator is arranged in the heat exchange cavity. According to the air cooled refrigerator disclosed by the invention, the air duct assembly is simple in structure, and moreover, a traditional air deflector and air door structure used for air guiding is canceled, so that the air duct structure of the air cooled refrigerator is simpler, the control is convenient, and the cost is low.

The present invention discloses a kind of bag-type dew-condensing dust-removing device specially-used for dew-condensing dampness. It is characterized by that it at least alternatively uses two dust-removing device, in which one is off-line for drying and cleaning dust, and another is used for normally removing dust. Said invention also equipped with a dry air-intake tube and a dry air door. After the dust is removed for a certain period of time, one dust-removing device is off-line, dried hot air is introduced so as to make cloth bag and dust be completely dried, then when it is used for making internal filtration the dust-scraping ring set in the cloth bag or it is used for making external filtration the dust-scraping ring set on the exterior of cloth bag can be controlled by cylinder and can be upwards and downwards moved, so that the dust can be completely removed.

Interior panels having integrated airbag doors for motor vehicles and methods for making such interior panels are provided herein. In one example, an interior panel comprises a substrate having outer and inner surfaces and an opening extending therethrough. An airbag chute-door assembly is mounted to the substrate and comprises a chute wall that at least partially surrounds an interior space. A door flap portion is pivotally connected to the chute wall and at least partially covers the opening. A perimeter flange extends from the chute wall and has a flange section that overlies the outer surface of the substrate. A molded-in lip feature extends from the flange section and contacts the outer surface to form a seal between the flange section and the substrate. A skin covering extends over the substrate and a foam is disposed between the skin covering and the substrate.

The invention relates to a heat exchange structure of a power battery box, wherein a temperature monitoring element is arranged in a battery module of a battery pack; the battery pack is erected in the middle of a battery box; a top space, a bottom space and a side surface space are respectively positioned between the upper surface, the lower surface and the side surface of the battery pack and the top, the bottom and the side surface of the battery box; a heating element is arranged in the battery box; a first air door and a second air door are arranged on the battery box; an air driving element is arranged in the battery box towards the second air door and at an acute angle with the second air door; and a control unit is electrically connected with the first air door, the second air door, the air driving element, the heating element and the temperature monitoring element. The invention has ingenious design, simple structure, low cost, convenient operation and both cooling and heating, thereby solving the problem of heat management of the battery box of an all-electric hybrid power vehicle, meeting the strict requirements of a battery on working temperature, enhancing the property of the battery and being suitable for large-scaled popularization and application.

The invention discloses a refrigerator and a separation embedded type air channel structure thereof. The separation embedded type air channel structure of the refrigerator comprises a refrigeration air channel and a temperature change air inlet channel communicating with the refrigeration air channel. The separation embedded type air channel structure further comprises a first temperature change air channel, a second temperature change air channel, a cold storage air inlet channel and a cold storage air channel. The first temperature change air channel and the second temperature change air channel are arranged in parallel, and the inlet end of the first temperature change air channel and the inlet end of the second temperature change air channel both communicate with the temperature change air inlet channel. The outlet end of the second temperature change air channel communicates with the cold storage air channel through the cold storage air inlet channel. A varying temperature air door is arranged in the first temperature change air channel. A cold storage air door is arranged in the cold storage air inlet channel. The cold storage air channel and the first temperature change air channel are arranged in a separation mode, and the varying temperature air door and the cold storage air door are arranged in the first temperature change air channel and the cold storage air inlet channel correspondingly, independent cold air control of a cold storage chamber and a temperature change chamber is achieved, and thus independent and precise temperature control over the cold storage chamber and the temperature change chamber is achieved.

The invention discloses a wind power generation device for vehicle running, which comprises a box, a cover, left baffles, right baffles, a wind wheel and an engine, wherein the left and the right baffles, the box and the cover form an air duct with a rectangular section. The left and the right baffles at the entrance region of the air duct form an symmetrical wide-front and narrow-back butterfly-shaped opening; the left and the right baffles at the middle region of the air duct form an symmetrical straight narrow opening; and the left and the right baffles at the exit region of the air duct form an symmetrical narrow-front and wide-back butterfly-shaped opening. The wind wheel is arranged at the rear part of the middle region. The axis of the wind wheel is perpendicular to the direction of the windage, and is parallel with and lower than the base line of the narrow opening; and both ends of the wind wheel are respectively provided with an engine. An air door which automatically controls opening and closing through a crank-rocker transmission mechanism is arranged at the entrance of the air duct. Since the engine does not bear the windage, the windage concentrates and accelerates at the butterfly-shaped opening of the entrance section through the air duct and impacts the wind wheel with a high speed at the rear part of the narrow opening so as to effectively drive the engine to operate in high speed to generate power. The wind power generation device is suitable to be arranged in the cabin of the relevant automobile and / or at the upwind position of the roof.

The invention relates to a freezing and refrigerating device and a defrosting control method of the freezing and refrigerating device. The freezing and refrigerating device comprises a box body and a door body, wherein at least one storage chamber, a supply air way, a return air way, a cooling chamber and a discharging air way are limited in the box body; the supply air way is used for supplying cooling airflow to the storage chamber; the return air way enables the airflow from the storage chamber to flow through; the cooling chamber is communicated with the supply air way and the return air way and is contained with an evaporator, a draught fan and a defrosting heater; the discharging air way is communicated with the cooling chamber and an environment space; the supply air way and the discharging air way are respectively provided with a supply air door and a discharging air door which are used for selectively switching on and / or blocking the supply air way and the discharging air way. The invention also discloses the defrosting control method of the freezing and refrigerating device. The defrosting control method comprises the steps of receiving a defrosting signal, starting the defrosting heater which is positioned on the evaporator, closing the supply air door, opening the discharging air door, enabling hot air generated by defrosting to be discharged into the environment space, and the like.

An improved rail car is pulled by an engine for transporting coal or other porous dust bearing materials. The car has opposing long sidewalls and opposing shorter end walls, which together define an initially open interior, a bottom and an open top. The open top of the car is covered by at least one pair of main doors in the form of opposing hinged A-frame sections which are pivotable between a closed, transport position and an open loading position which exposes the rail car interior for loading. The A-frame sections also have longitudinally spaced edges which are spaced apart to form a discharge door opening. A discharge door is located in each of the discharge door opening and is pivotally hinged within the respective door opening so that it opens under the influence of gravity in a rotary dumping operation. The discharge doors, together with the A-frame sections, form a door-within-a-door operating configuration.