301results about How to "Uniform air supply" patented technology

The invention discloses an air conditioner and an air outlet device thereof. The air outlet device of the air conditioner comprises a rotation seat, a circumferential rotation driving device, an air tunnel assembly and an up-down rotation driving device. The rotation seat is arranged at the top of a machine shell circumferentially rotationally. The circumferential rotation driving device is used for driving the rotation seat to rotate circumferentially. The air tunnel assembly is arranged on the rotation seat in an up-down rotation mode. An air tunnel penetrating through the thickness of the air tunnel assembly is formed in the air tunnel assembly. An air channel is formed in the air tunnel assembly around the circumferential direction of the air tunnel and communicated with the inside of the machine shell and the outside world respectively. The up-down rotation driving device is used for driving the air tunnel assembly to rotate up and down. According to the air outlet device of the air conditioner, air can be guided in both the circumferential direction and the up-down direction, so that the air supplying range is large; comfortableness is high, and the running noise is small.

The invention discloses a fan which comprises a base, an air outlet element and an airflow generation device, wherein an air inlet cavity is formed in the base, and air inlets communicated with the air inlet cavity are formed in the base; the air outlet element is arranged on the base, an air outlet cavity communicated with the air inlet cavity is formed in the air outlet element, and a plurality of slits extending in the length direction of the air outlet element are formed in the air outlet element so as to form a plurality of air outlets communicated with the air outlet cavity; the airflow generation device is arranged in the air inlet cavity, absorbs outside air into the air inlet cavity and guides the air to the air outlet cavity. According to the fan, exposure of fan blades can be avoided, and the fan has the advantages of use safety, easiness in cleaning, large air volume, high air speed and the like.

The invention relates to a steam sterilizing process for the disinfection of medical appliances in hospital, and the steam sterilizer employing the steam sterilizing process, which comprises the steps of vacuumizing, preheating, sterilizing and cooling down. The steam sterilizer comprises a steam sterilizing box, a valve group, an air filter, a steam generator, a vacuum pump and an automatic control system.

The invention is suitable for the technical field of an air conditioner, and discloses an air conditioner and an air supplying method of the air conditioner. The air conditioner comprises a casing and a heat exchanger arranged in the casing, wherein an air inlet is formed in the casing; the casing is provided with an air hole penetrating through the casing; an air outlet which is used for blowing out the airflow to enable the negative pressure to be generated at the air hole is formed in the inner wall of the air hole; an airflow generating device which is used for driving the airflow to enter into the casing from the air inlet and discharging the airflow out the casing from the air outlet after the airflow flows through the heat exchanger is arranged in the casing; the air hole is positioned in one side of the airflow generating device. The air supplying method of the air conditioner adopts the air conditioner. By adopting the air conditioner and the air supplying method of the air conditioner, the aerodynamics theory is used, and an air supplying effect having performance many times higher than the performance of the air inlet and the air outlet is formed; the energy efficiency utilization is high; the air supplying effect is excellent; the air output is stable and uniform; people feel comfortable; the energy-saving and environment protection effect of the air conditioner is excellent.

The invention discloses a control method for a cabinet air conditioner, the cabinet air conditioner, a processor, and a storage media. The cabinet air conditioner includes an upper air outlet and a lower air outlet. The method comprises the steps that the current working mode of the cabinet air conditioner is tested, wherein the working mode includes a heating mode and refrigerating mode; the control mode corresponding to the working mode is determined; and the air-out state of the lower air outlet is controlled according to the control mode. The technical problem that the lower and upper airoutlets of the cabinet air conditioner have a temperature difference in related technology is solved.

The invention discloses an air conditioner and an air supply structure thereof. The air supply structure of the air conditioner is provided with an air tunnel throughout the air supply structure in the front-back direction. The air supply structure internally comprises a plurality of air channels. The air channels are arranged in a mutually spaced mode. Each air channel is provided with an air inlet and an air outlet. The air inlets of all the air channels are formed in the bottom of the air supply structure. All the air outlets are formed in the front end of the air supply structure and surround the air tunnel. The air outlets of all the air channels are sequentially arranged in the vertical direction. According to the air supply structure of the air conditioner, supplied air is more uniform.

The invention relates to a low-emission static oxygen-control biologically-enhanced humification composting method. The method comprises the following steps: respectively crushing organic wastes intoparticles with the particle size of less than 5 cm; uniformly mixing and stirring according to a weight ratio; adding a biologically-enhanced composite microbial agent accounting for 0.1-0.5% of the total amount of the mixture and allowing the water content of the organic waste stock to be 60-65%, the carbon-nitrogen ratio to be 23-30, and the volume weight to be 700-950 kg / m<3> to obtain a composting raw material. Air with a supply amount of 0.40-0.45 m<3> / h / m<3>, air with a supply amount of 0.28-0.38 m<3> / h / m<3> and air with a supply amount of 0.13-0.26 m<3> / h / m<3> are respectively providedthrough high-pressure aeration pipes in the three stages of compost temperature rise, high temperature and temperature reduction to fully decompose organic matters; and after fermentation is completed, the water content of a finished product fertilizer is 33-42%, the volume weight is reduced to 400-650 kg / m<3>, the volume of a pile body is reduced by 30-50%, and meanwhile, emission of methane, nitrous oxide, ammonia gas and hydrogen sulfide is reduced.

The invention discloses an intelligent control household garbage pyrolysis gasifier, and belongs to the technical field of household garbage resource utilization. The gasifier comprises an air supply system, a feeding device, a material distributing device, a rotary furnace grate and an ash disc drive mechanism. The feeding device comprises a spiral feeding bind and a lifting bucket, the periphery of a material bin cover is provided with a water seal structure, and the center position is provided with a material pressing rod connected with an electrician push rod. The material distributing device is disposed on a transverse support frame driven by two oil cylinders, and an electric speed reducer drives a shifting piece on a material distributing main shaft to rotate. The rotary furnace grate drives a worm gear gear ring through a worm by utilizing an electric worm and gear speed reducer. An ash disc adopts an electric worm and gear speed reducer to drive the ash disc to rotate. The air supply system is divided into a bottom air supply part and a side air supply part. The pyrolysis gasifier solves the air distribution non-uniform problem, and the rotary furnace grate can smoothly and effectively solve the deviant combustion problem of the gasifier. The rotary furnace grate separates air distribution from ash arrangement, the air distribution or the ash arrangement can be adjusted in the operation process as needed, and then operation of the gasifier is stable.

The invention is applicable to the technical field of air conditioners and discloses a ceiling air conditioner and an air supplying method using the same. A wind wheel forwards blows out airflow from an air outlet in the side wall or periphery of each wind tunnel, the airflow can carry the adjacent airflow to move forward together while being blown out forwards from the air outlet along the axial direction of the wind tunnel, so that negative pressure is formed in the wind tunnel; under the pumping action of negative pressure, air at the rear part of the wind tunnel is pumped forward so as to enter through an opening in the rear end of the wind tunnel, pass through the wind tunnel and flow out from an opening in the front end of the wind tunnel, so that the air supplying effect of an airflow center is enhanced; furthermore, air around the wind tunnel is supplemented under the action of negative pressure, and the central airflow drives the surrounding airflow to flow forward together, so that the air supplying range is enlarged, an air supplying effect which is at least multiple times that of the air inlet capacity of the air inlet is formed, the energy efficiency utilization ratio is high, a lot of cold air or hot air is prevented from being directly blown to the head of a user and further causing discomfort of the user, the air supplying effect is good, and the comfortable degree of a human body can be improved.

The invention provides an air supply control system and method for an air conditioner. A wind force gear position and an air supply mode are set by a remote control, and the system comprises a ranging module, an angle measuring module and a controller. The ranging module is used for measuring spatial structural data of a room, including lengths a and b, width c and height h of the room; the angle measuring module is used for measuring air supply angle data of the air conditioner, including angles of left and right wind guide plates as well as angles of upper and lower wind guide plates of the air conditioner, and the controller is used for controlling an air output of the air conditioner according to spatial structural data, the air supply angle data and the wind power gear position. The air supply control system and method can adjust a wind power strength according to the spatial structure of the room, such that the wind powers in different positions of the room is more balanced, persons in different positions in the room can feel a higher comfort level, and energy consumption is reduced.

The invention belongs to the technical field of air ducts, and discloses an air duct system, an air supply method of the air duct system and a fan and an air conditioner with the air duct system. An air flow channel is divided into at least two sub channels by air tunnel portions, wind wheels suck air flow in from air inlets, the air flow is made to flow through a heat exchanger and then made to be blown out forwards from air outlets located on the inner side or the periphery of the air tunnels, the air tunnels are front-back through tunnels, air enters an air inlet portion from the air inlets, flows to squeezing portions, then is divided into at least two streams under the effect of the air tunnel portions and then is blown out from the air outlets, air blown out from the air outlets enables the front sides of the air tunnels to form negative air pressure, and air at the rear portions of the air tunnels is sucked forwards and flows out from front end openings of the air tunnels. The air supply effect which is at least multiple times the air inlet capacity of the air inlets is formed through the principles of the aerodynamics, the energy efficiency utilization rate is high, the air supply effect is good, and the energy saving and environment protection effects are good.

The invention relates to a connecting-rod air-guide structure for the room unit of air conditioners, in which air-guide blades are connected by a connecting rod and controlled by a motor. When exhausting the air at the air outlet, the motor drives an air-guide rod to be in the reciprocating motion via the inventive connecting-rod air-guide structure, so as to drive the air-guide blades to be in the side-to-side movement for scavenging.

An air outlet air volume adjustable air-conditioning system comprises a temperature control device, a fan and an air outlet air volume adjusting device, wherein the air outlet air volume adjusting device is arranged on an air outlet of the fan, the temperature control device is and electrically connected with the fan and mechanically connected with the air outlet air volume adjusting device, and the fan and the air outlet air volume adjusting device adjust the air supply volume and the air outlet size according to the temperature adjustment air supply volume and the air outlet size set through the temperature control device and mutual influence of the air supply volume and the air outlet size. The purpose of even air supply under the minimum fan consumption can be achieved by adjusting the air supply volume and the air outlet size.

The invention discloses a pulsed steam sterilization process suitable for sterilizing medical equipment and a steam sterilizer for the steam sterilization process. The sterilization process comprises the following steps of vacuumizing, preheating, sterilizing, performing vacuum drying and the like. The steam sterilizer comprises a steam sterilization box, a valve bank, an air filter, a steam generator, a vacuum pump and an automatic control system. Compared with the prior art, the invention has the advantages that: by the pulsed steam sterilization process and the steam sterilizer thereof, a sterilization apparatus can be transported without packaging, the temperature raising and reduction time of the sterilization is shortened, the sterilization time of the apparatus is shortened, the labor intensity of medical care personnel is reduced, and the disinfection and sterilization are more complete and have a better effect.

The invention relates to a railway-vehicle air-conditioner air supplying and returning system, which comprises air conditioners, wherein the air conditioners are arranged at both ends of a vehicle top, a through-type main air channel is arranged above a guest-room flat-top plate, an air outlet of each air conditioner is connected with the main air channel, and air is supplied to a guest room by the main air channel through an air-supplying opening which is formed below the main air channel; each air conditioner is provided with a first air-returning opening which is fixed to a vehicle-end flat-top plate and a second air-returning opening which is positioned above the vehicle-end flat-top plate, the lower edge of a guest-room lateral top plate is fixed to a connecting iron which is arranged on a lateral-wall framework through bolts, a cushion block is arranged between the connecting iron and the upper surface of the lower edge of the lateral top plate, an air-returning channel is formed between the lateral top plate and a lateral wall, and the air-returning channel is communicated with the second air-returning opening. According to the railway-vehicle air-conditioner air supplying and returning system, two air-returning channels are respectively formed between the guest-room lateral top plate and the two lateral walls, and the air-returning openings are formed in a vehicle-end flat top. One part of circulating air in a vehicle enters the upper space of a vehicle top through the air-returning channels and flows back to a machine set, and the other part of the circulating air directly flows back to the machine set through the air-returning openings in the vehicle-end flat top. According to the scheme, the airflow organization in the vehicle is improved, and the uniformity of a temperature and humidity field and a velocity field is improved.

The invention discloses an air cooled refrigerator and an air flue thereof. The air cooled refrigerator comprises a box body, a door body, the air flue, a fan and an evaporator, wherein the box body is internally provided with a cooling chamber and a freezing chamber; the door body is arranged on the box body; the air flue comprises an air flue plate and an air supply pipe; the air flue plate is arranged in the freezing chamber; an air passage is defined by the air flue plate and the wall of the freezing chamber, and provided with first air outlets and return air inlets, which are communicated with the freezing chamber; a second air outlet is formed in the air flue plate and in the middle part of the air flue plate in the horizontal direction; one end of the air supply pipe is connected with the second air outlet, and the other end of the air supply pipe is communicated with the cooling chamber; the fan and the evaporator are arranged in the air passage. According to the embodiment of the invention, since the air cooled refrigerator is provided with the air flue, the air cooled refrigerator has the advantages of being uniform in temperature in the refrigeration chamber, low in energy consumption and the like.

The invention belongs to the technical field of air ducts, and discloses an air duct system, an air supply method of the air duct system and an air conditioner with the air duct system. Air flow blown out from all air outlets flows forwards to enable negative pressure regions to be formed on the front sides of all air tunnels, and under the effect of all the negative pressure regions, air on the rear sides of the air tunnels is sucked to penetrate through the air tunnels, so that the air is blown out forwards with the air flow blown out from the air outlets. Due to the fact that air has certain viscosity, when the air flow is blown out from the air outlets, the air flow carries adjacent air flow to flow forwards together, the air supply effect at the air flow center is enhanced, moreover, air around the air tunnels is supplemented due to the effect of negative pressure, the air supply range is expanded, the air supply effect which is at least multiple times the air inlet capacity of air inlets is formed through the principles of the aerodynamics, the energy efficiency utilization rate is high, the air flow does not need to be cut by fan blades, the air supply amount is stable and even, human bodies can feel more comfortable, and the air supply effect is good.

The invention discloses an edible fungi liquid strain biological fermentation tank, which comprises a tank body of which the top is provided with a feed port. The edible fungi liquid strain biological fermentation tank is characterized in that: a conical lower sealing head is arranged on the lower part of the tank body; an air inlet is formed at the bottom of the lower sealing head; an air inlet pipe is connected to the air inlet; a baffle is fixedly arranged on the lower sealing head above the air inlet; and an air passage is formed between the baffle and an inner wall of the lower sealing head or is formed on the baffle. When the edible fungi liquid strain biological fermentation tank is used for fermenting liquid strains, clean air or oxygen enters the tank body from the air inlet at the bottom of the lower sealing head through the air inlet pipe under certain pressure. Due to blockage and air distribution functions of the baffle, clean gases with certain pressure uniformly enter the tank body from the air passage, and the gases move from bottom to top. Therefore, the edible fungi liquid strain biological fermentation tank can realize effective and uniform oxygen supply, has the non-destructive aerodynamic mixing function, and replaces a hard mixing device in the prior art. The edible fungi liquid strain biological fermentation tank has the advantages of simple and reasonable structure, convenient use, uniform oxygen supply and mixing, and good fermentation effect on the liquid strains.

The invention discloses a bus ceiling evaporative cooling air conditioner system. The bus ceiling evaporative cooling air conditioner system is composed of a plurality of ceiling evaporative cooling units arranged on a bus roof, and the multiple ceiling evaporative cooling units communicate with the interior of a bus carriage. According to the bus ceiling evaporative cooling air conditioner system, the quality of air in a bus can be effectively improved, and the energy consumption of an air conditioner is low.

The invention relates to an air quantity regulation device and an air quantity regulation method. The air quantity regulation device is used for regulating the air quantity of a front end of an air-conditioning air channel of a passenger car. The air quantity regulation device comprises an air quantity detector, a controller and an air supply module, wherein the air quantity detector detects the air quantity of the front end of the air channel and sends the air quantity to the controller; the controller receives the air quantity data of the front end of the air quantity and compares the air quantity data with a set air quantity value; and when the air quantity of the front end of the air channel is smaller than the set air quantity value, the controller controls the air supply module to start to supply air and regulates the air quantity of the front end of the air channel. According to the invention, the air quantity of the front end of the air channel is detected; when the air quantity is smaller than the set air quantity value, the air quantity regulation device is controlled to start to supply the air; the air quantity of the front end of the air channel is increased; the air can be supplied uniformly; an environmental temperature of a driver is effectively reduced; and the comfort degree of the driver is improved, so the driver can work normally. The reduction of the air-conditioning temperature of the whole car is not required, so passengers who sit in the middle of the car cannot feel too cold, and the operation oil consumption of the whole car is reduced at the same time.

The invention discloses a flow-equalizing ventilation device, which is characterized by simple and convenient operation. The flow-equalizing ventilation device comprises a plurality of air openings arranged on a ventilation pipeline, wherein the ventilation pipeline comprises an opened end and a closed end, one air opening closest to the closed end of the ventilation pipeline belongs to the first group, other air gaps belong to the second group, windward sections of all the air openings are parallel to the section of the ventilation pipeline, a flow limiting device is arranged at least on each air opening in the second group and is specifically arranged on the other end corresponding to the end of the windward section; and the number of the opened flow limiting devices of the air openings arranged on the ventilation pipeline sequentially increases or decreases as the distance from the flow limiting devices to the farthest position of the closed end of the ventilation pipeline decreases gradually. The quantity and speed of airflows can be adjusted by adjusting the number of the opened flow limiting devices so as to realize uniform air supply and uniform air discharge, and simultaneously, the flow-equalizing ventilation device with simple and convenient operation can realize uniform air supply and discharge via simple adjusting and flow limiting devices.

The invention relates to an automatic chiseling trolley. The automatic chiseling trolley comprises a chiseling machine body, a chiseling machine steering device, a dust collection fan and a raised dust wet process treatment device. The chiseling machine steering device is arranged at the front end of the chiseling machine body, and a driving wheel device is arranged at the lower end of the chiseling machine body; the chiseling machine steering device is connected with the driving wheel device and is used for steering of the driving wheel device; the dust collection fan is arranged in the chiseling machine body; and an outlet of the dust collection fan is connected with the raised dust wet process treatment device through a raised dust pipeline. The dust collection fan is arranged in the chiseling machine body, and dust generated in the chiseling process is absorbed through the dust collection fan; the absorbed dust is pumped in the raised dust wet process treatment device through the raised dust pipeline to be treated in a wet process manner; and the phenomenon that in the chiseling process, a large amount of dust is generated to pollute the environment is avoided. Due to arrangement of the driving wheel device, movement of the trolley is facilitated; and the chiseling machine steering device is arranged to facilitate steering of the trolley in the process of use and movement.

The invention, which belongs to the field of building heating-ventilation air conditioners, relates to a normal-low-pressure high-low-temperature human body thermal comfort experiment environment cabin comprising an environment cabin body, a pressure control system, a temperature and humidity control system, a fresh air control system, an oxygen concentration control system, an illumination control system, an environment monitoring and controlling system and a human body physiological parameter measuring system. The pressure control system, the temperature and humidity control system, the fresh air control system, and the oxygen concentration control system are arranged at the outer side of the environment cabin body; and the illumination control system, the environment monitoring and controlling system and the human body physiological parameter measuring system are arranged in the environment cabin body. The pressure control system is mainly formed by sequentially connecting a vacuumpump and a vacuum tank with the environment cabin body. The temperature and humidity control system is mainly formed by sequentially connecting a direct evaporation surface cooling section, an electric heating section, a fan section and a humidifying section with the environment cabin body. The fresh air control system is mainly formed by sequentially connecting a filter, a dehumidifier, a gas-gasheat exchanger and a silencer with the environment cabin body.

The invention belongs to the technical field of air ducts, and discloses an air duct system, an air supply method of the air duct system, a fan with the air duct system and an air conditioner with the air duct system. Airflow is at least divided into two ways and blown out from air outlets in the two sides of an air tunnel through flow diversion passages, so that airflow moving forwards evenly and stably is formed on the two sides of the air tunnel, strong and stable negative pressure can be generated in the air tunnel, under the suction effect of the negative pressure, air at the rear of the air tunnel is sucked forwards, enters the air tunnel from the rear end of the air tunnel, penetrates through the air tunnel, and then flows out of an opening in the front end of the air tunnel, the air supply effect of an airflow center is enhanced, air surrounding the air tunnel is supplemented due to the effect of the negative pressure, the center airflow drives the airflow surrounding the center airflow to move forwards together, the air supply range is increased, based on the aerodynamics principle, the air supply effect that the air inflow capacity is multiple times of the air inflow capacity of air inlets is formed, the energy efficiency utilization rate is high, and the air supply effect is good.

The invention provides an air conditioner. The air conditioner comprises a volute, supporting frames (10) and an air guiding device. The volute is provided with a first volute tongue and a second volute tongue and an air outlet of the air conditioner is formed between the first volute tongue and the second volute tongue. The supporting frames (10) are connected between the first volute tongue and the second volute tongue in a supporting mode. The air guiding device comprises a plurality of air guiding blade sets, each supporting frame (10) is located between every two adjacent air guiding blade sets, each air guiding blade set comprises a plurality of first blades (20) which can swing in a left-and-right mode, and the blades (20) are installed on the volute. The air conditioner further comprises second blades (30), each second blade (30) is arranged between every two adjacent air guiding blade sets, the first ends of the second blades (30) are fixedly connected to the supporting frames (10) and the second ends of the second blades (30) are swing ends. The air conditioner is even is air sweeping and better in air guiding effect.

The invention discloses a noise-reducing axial flow fan comprising a shell, an impeller is mounted in the shell, multiple unequal sawtooth grooves are formed in the tail of each blade of the impeller, non-equidistant sawteeth cut and comb a large eddy generated at the air outing position to form a plurality of small eddies, viscous air flow at roots of the blades is effectively separated and guided so as to form desired air flow. The axial flow fan is reasonable in structural design, stable in operation, uniform in air supply and stable in placement. An external motor dissipates heat timely by itself without affecting operation, automatic induction and alarm reminding can be performed when the fan is under abnormal actions in operation, and accordingly danger coefficient is lowered; meanwhile, the motor can be powered off automatically, the impeller stops operation immediately, and personal injuries are minimized.

The invention discloses a sludge low-temperature drying machine and a using method thereof. The sludge low-temperature drying machine is composed of a heat pump chamber, a sludge drying chamber, an air supply pipeline and an air return pipeline, wherein the air supply pipeline and the air return pipeline are connected with the heat pump chamber and the sludge drying chamber. Circulating hot air dehumidification and dehumidified dry air temperature rise are achieved in the heat pump chamber through transfer circulation of a working medium in a heat pump system. Feeding sludge in the sludge drying chamber is evenly laid on a conveying mesh belt after being cut into strips and formed twice, circulating hot air makes direct contact with the cut sludge, heat for evaporating water is provided, water in the sludge is taken away, and the sludge is dewatered and dried. Hot air circulates between the sludge drying chamber and the heat pump chamber through the air supply pipeline and the air return pipeline. According to the sludge drying machine, two sludge slitting and forming devices are arranged to form sludge twice, so the forming effect is good, sludge drying is facilitated, and compared with a traditional sludge drying machine, the sludge drying machine can better adapt to to-be-treated sludge with the high water content.

The invention discloses a novel wind chamber enabling wind to enter in a tapered way. The novel wind chamber comprises a wind chamber body; a wind deflector inclining upward is arranged in the wind chamber body and consists of branch wind deflectors which are symmetrically arranged along the axial direction of the wind chamber body; lower edges b of the two branch wind deflectors are to each other; at the side near a wind inlet, the upper edges a of the two branch wind deflectors have the distance of L1 from each other, and at the side far away from the wind inlet, the upper edges a of the two branch wind deflectors have the distance of L2 from each other; an included angle alpha between the axial direction of the lower edge b of each branch wind deflector and the horizontal plane is in the range of 4-10 degrees; the wind chamber body provided with the wind deflector has a Y-shaped section, an included angle beta between two Y-shaped inclined edges and the vertical direction is in the range of 100-150 degrees; a dust collecting storage is arranged below a gap; and a plurality of wind strips are radially arranged in parallel at equival intervals at a wind outlet along the wind chamber body. According to the invention, the novel wind chamber enabling wind to enter in a tapered way is simple in structure and ingenious in design and can utilize a tapered wind deflector to enable air to be uniformly blown.

The invention provides a side-by-side combination refrigerator, comprising a refrigerator body of which the front side is unenclosed, a partition and a first evaporator, wherein the partition is vertically arranged in the refrigerator body so as to divide the internal space of the refrigerator body into a first refrigerating chamber and a second refrigerating chamber arranged left and right, and the interior of the partition is hollowed to form a containing cavity; and the first evaporator is arranged in the containing cavity, and is configured to provide cold energy for the first refrigerating chamber and the second refrigerating chamber. According to the side-by-side combination refrigerator provided by the invention, the internal space of the refrigerator can be reasonably utilized, so that effective volume of each chamber is increased.