JP6919876B2 - Centrifugal fluid machinery and air conditioners - Google Patents

Description

The present invention relates to a centrifugal fluid machine that performs centrifugal compression or centrifugal ventilation.

Centrifugal compressors and centrifugal feeders have similar structures, for example, a diffuser that converts kinetic energy into pressure energy is provided downstream of the impeller. A scroll casing is provided downstream of the diffuser to collect the flow discharged from the diffuser and supply it to the demand source (see, for example, Patent Document 1). Such a centrifugal compressor or a centrifugal blower is hereinafter referred to as a centrifugal fluid machine. Further, as a centrifugal fluid machine, a supercharger such as a turbocharger or a supercharger is known.

Japanese Unexamined Patent Publication No. 2001-248597

By the way, centrifugal fluid machines include, for example, turbochargers that use an exhaust gas turbine as a drive source, superchargers that use an engine as a drive source, and other centrifugal blowers and centrifugal compressors. There are some that use a motor as a drive source. When the drive source is a gas turbine with exhaust gas or the drive source is an engine to which a supercharger is attached, the energy efficiency is excellent and the cost for energy consumption can be reduced, but the driving force of an internal combustion engine or the like can be reduced. It does not work unless it is combined with a machine that produces exhaust gas. In addition, replacing the air in the room for air conditioning (air conditioning) and using natural wind for cooling will lead to cost reduction, but controlling wind power, air volume, temperature, humidity, etc. I can't.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a centrifugal fluid machine that blows air and compresses air by using wind power as a driving source.

In order to achieve the above object, the centrifugal fluid machine according to the present invention includes a drive impeller that is rotated by wind power and a drive impeller.
A driven impeller that rotates by transmitting the rotation of the drive impeller, and
The casing that covers the driven impeller and
A suction pipe that sends air sucked into the center side of the driven impeller into the casing,
The casing is provided with a discharge portion which is provided on the casing and discharges air which is sucked on the center side of the driven impeller and then pushed out by centrifugal force on the outer peripheral side.

According to such a configuration, a drive impeller, that is, a wind turbine is rotated by wind power, and the rotation of the drive impeller is transmitted to a driven impeller used in a centrifugal blower or a centrifugal compressor, and air is sucked by centrifugal force. So, it is designed to discharge to the outside. Therefore, wind power can be used for blowing and compressing air, and the cost of power can be reduced. In addition, compressors and blowers can be used in places where power is not supplied. In these cases, instead of directly using the natural wind, the force of the wind is converted into rotational kinetic energy by a windmill and then used for air pressure and ventilation by a centrifugal compressor or a centrifugal blower. It is possible to stabilize the amount of air blown against changes in strength and weakness, and it can be used more effectively than natural wind.

In the configuration of the present invention, the drive blade is provided with a cylindrical body that is cylindrical and is provided coaxially with the drive impeller, and is provided by a wind passing through the inside of the cylinder. It is preferable that the car rotates.

According to such a configuration, it is possible to suppress the wind that becomes a crosswind with respect to the rotation axis direction of the drive impeller and stabilize the rotation of the drive impeller.

Further, in the configuration of the present invention, a rotating shaft provided coaxially with the driving impeller and rotatable around an axis, and a speed increasing machine that accelerates the rotation of the driving impeller and transmits the rotation to the rotating shaft. With
It is preferable that the driven impeller rotates integrally with the rotating shaft that rotates by transmitting the rotation of the drive impeller.

According to such a configuration, the rotation speed of the driven impeller can be increased when the rotating shaft of the driving impeller and the rotating shaft of the driven impeller are directly connected, and even when the wind is weak. Sufficient ventilation and air compression are possible. In addition, since the rotation of the drive impeller, which is a wind turbine, is transmitted to the driven impeller of the centrifugal blower or centrifugal compressor coaxial with this drive impeller, the driven impeller is arranged within the diameter of the drive impeller. Therefore, the size of the entire device can be reduced.

According to the present invention, it is possible to blow air and compress air at low cost by using natural wind.

It is a perspective view from the oblique front which shows the air-conditioning apparatus using the centrifugal type fluid machine which concerns on embodiment of this invention. The same is a perspective view from the diagonally rear view. It is a perspective view from the diagonal front excluding the tubular body and the air collecting part. It is a perspective view from the diagonal back side excluding the tubular body and the air collecting part. The same is a plan view. The same is the front view. The same is a side view. The same is the rear view. The same is the bottom view. It is a side view excluding the tubular body and the wind collecting part. (A) is the same side view, (b) is a sectional view taken along line AA of (a), and (c) is a sectional view taken along line BB of (a). (A) is a front view of the same, and (b) is a sectional view taken along line AA of (a).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present embodiment, an air conditioner including a centrifugal fluid machine as a centrifugal blower (centrifugal compressor) using wind power as a drive source will be described. In the following description, as shown in FIGS. 1, 2 and the like, the axial direction of the tubular body 3 described later is the front-rear direction, and the side of the tubular body 3 provided with the trumpet-shaped air collecting portion 12 is the front side. do.

As shown in FIGS. 1 to 12, the air conditioner 1 is provided in a rectangular frame-shaped frame body 2, a tubular body 3 provided inside the frame body 2, and inside the tubular body 3. The drive impeller 4, the rotary shaft 5 provided coaxially with the drive impeller 4, the driven impeller 51 that rotates integrally with the rotary shaft 5, and the rotation speed of the drive impeller 4 are increased. To the speed increasing machine 7 that speedily transmits to the rotating shaft 5, the scroll casing 6 (discharge part) that covers the outer peripheral side of the driven impeller 51, and the rotation center side, that is, the center side of the driven impeller of the scroll casing 6. The suction pipe 24 to be connected, the branch pipe 25 formed by branching to the suction pipe 24, the heat exchanger 10 provided at the tip of the branch pipe 25, the hot water solar panel 11, and the hot water tank 16. It is provided with a cold water tank 17.

As shown in FIGS. 1 to 4, the frame body 2 has a structural material joint 21 arranged at each of the eight corners (connection portions), and the structural material joint 21 has a plurality of square tubular structures. The lumber 22 is assembled by being connected in a rectangular parallelepiped shape. The structural material joint 21 includes three joint members into which the end portion of the structural material 22 can be inserted and fixed. Each joint member is formed in a regular square cylinder shape, and their base ends are joined to each other by, for example, welding or adhesion.

The tubular body 3 is formed in a cylindrical shape, and its axial length is substantially equal to the front-rear extending sides of the frame body 2. Further, the diameter of the tubular body 3 is substantially equal to the vertically extending side and the left and right extending side of the frame body 2. Therefore, the tubular body 3 is provided almost completely inside the frame body 2. Further, the front and rear openings of the tubular body 3 are arranged at positions substantially equal to the front and rear surfaces (front and back surfaces) of the frame body 2.
The frame body 2 is provided with four fixing rods 47 extending in an oblique direction toward the inside thereof, and one end of these fixing rods 47 is fixed to the structural member 22. The fixing rod 47 penetrates the through hole formed in the tubular body 3, and the other end portions are fixed to the fixing portion 46 described later. Further, the through hole of the tubular body 3 and its vicinity are fixed to the fixing rod 47, whereby the tubular body 3 is supported by the fixing rod 47 and is provided inside the frame body 2.

A wind collecting portion 12 is provided at the opening on the front side (front side) of the tubular body 3. The air collecting portion 12 is formed in a trumpet shape, and its inner diameter is reduced so that the diameter becomes smaller toward the tubular body 3 side. Therefore, the flow path cross-sectional area of the air collecting portion 12 becomes smaller from the front opening 12a toward the rear opening 12b. The diameter of the rear opening 12b is substantially equal to the diameter of the tubular body 3, and the opening 12b is connected to the front opening of the tubular body 3.

As shown in FIGS. 3 and 4, the drive impeller 4 includes a cylindrical rotating member 41, a mounting portion 42 provided on the rotating member 41, and a plurality of mounting portions 42 having a base attached to the mounting portion 42. It is provided with a blade 43.
As shown in FIGS. 11 and 12, a cylindrical casing (fixing member) 45 is provided inside the rotating member 41. The front end of the casing 45 is fixed to a disk-shaped fixing portion 46. As shown in FIG. 3, the fixing portion 46 is fixed to a fixing rod 47 diagonally provided on the frame body 2. As shown in FIGS. 7, 9, and 10, the fixing rod 47 penetrates the through hole formed in the tubular body 3, and the fixing portion 46 is attached to the tip end portion (the other end portion) of the fixing rod 47. Is fixed.

Further, as shown in FIGS. 11 and 12, bearings 48, 48 are provided between the casing 45 and the rotating member 41 at predetermined intervals in the axial direction of the rotating member 41, and the bearings 48, 48 provide the bearings 48, 48. The rotating member 41 can rotate around the axis while being supported by the casing 45.
Further, in the radial center portion of the casing 45, a rotating shaft 5 provided coaxially with the drive impeller 4 is provided so as to be rotatable around the axis. The front end of the rotating shaft 5 penetrates the fixing portion 46 and extends to the front. A driven impeller 51 is provided at the front end of the rotating shaft 5.
On the other hand, the rear end of the rotating shaft 5 projects from the casing 45. A sun gear 72, which will be described later, of the speed increaser 7 is attached to the rear end of the rotating shaft 5.

Further, as shown in FIGS. 2, 4, 8 and 12, the speed increaser 7 on the rear end surface of the casing 45 transmits the rotation of the drive impeller 4 to the rotation shaft 5 by increasing the rotation speed. A planetary gear mechanism is provided.
That is, the speed increaser 7 includes a ring gear 71, a sun gear 72 provided at the center of rotation of the ring gear 71, and a plurality of (for example, five) planetary gears 73. The rotation centers of the ring gear 71 and the sun gear 72 coincide with the rotation centers of the rotation shaft 5.
A flange portion is formed on the outer peripheral portion of the ring gear 71, and this flange portion is fixed to the upper end portion of the rotating member 41. Therefore, when the drive impeller 4 rotates, the rotating member 41 rotates accordingly, and the rotating member 41 rotates, so that the ring gear 71 rotates.

Further, the rear end of the rotating shaft 5 is inserted into and fixed to the sun gear 72, and the rotating shaft 5 rotates as the sun gear 72 rotates.
Further, the planetary gear 73 meshes with the ring gear 71 and the sun gear 72, and when the ring gear 71 rotates, the planetary gear 73 revolves around the sun gear 72 while rotating on its axis. Therefore, when the ring gear 71 rotates, the planetary gear 73 revolves and rotates while rotating inside the ring gear 71, whereby the sun gear 72 rotates about the axis.

The number of teeth and the diameter of the ring gear 71, the planetary gear 73, and the sun gear 72 are set so that the sun gear 72 rotates 10 times when the ring gear 71 makes one rotation by the drive impeller 4. Therefore, in such a speed increaser 7, the rotation speed of the drive impeller 4 is increased 10 times to rotate the sun gear 72, and this rotation causes the rotating shaft 5 to rotate 10 times faster than the drive impeller 4. It is designed to rotate.

Further, as shown in FIGS. 11 and 12, a casing (fixing member) 45 is provided inside the drive impeller 4, and a cylindrical coil 8 is fixed to the outer peripheral surface of the casing 45, while the cylindrical coil 8 is fixed. A permanent magnet 9 is fixed to the inner peripheral surface of the rotating member 41 of the drive impeller 4 with a predetermined interval from the coil 8.
Then, power is generated by the cooperation of the coil 8 and the permanent magnet 9, and the generated electricity is stored in the battery or used directly.
The permanent magnet 9 may be fixed to the outer peripheral surface of the casing 45, and the coil 8 may be fixed to the inner peripheral surface of the rotating member 41.
As described above, a power generation device including a coil 8 and a permanent magnet is incorporated inside the drive impeller 4.

As shown in FIG. 12, the rotating shaft 5 penetrates the front end of the casing 45 and further penetrates the fixing portion 46. A driven impeller 51 is provided on the front side of the fixed portion 46 of the rotating shaft 5. The driven impeller 51 includes a substantially conical rotating body 52 and a plurality of blades 53 provided on the conical front surface (outer peripheral surface) of the rotating body 52. In the cross section of the rotating body 52, the cross section of the conical outer peripheral surface has a curved shape so that the hypotenuse is recessed. Further, the rotating body 52 and the rotating shaft are integrally rotatably joined in a state where the rotating shaft 5 penetrates the center of the rotating body 52 on a substantially conical shape.

The driven impeller 51 is an impeller (impeller) of a centrifugal compressor (centrifugal blower), and the rotating blades 53 suck air from the rotation center portion on the front side of the driven impeller 51 and push it out to the outer peripheral side by centrifugal force. It has become like. Further, a disk-shaped bottom plate 54 is provided between the front surface of the fixing portion 46 and the rear surface of the rotating body 52 of the driven impeller 51, and the rotating shaft 5 penetrates the bottom plate 54. The bottom plate 54 is fixed to the fixing portion 46 and does not rotate together with the rotating shaft 5. The bottom plate 54 has a diameter slightly larger than that of the driven impeller 51, and covers the rear surface of the driven impeller 51.

A scroll casing 6 is provided on the outer peripheral side portion of the front surface of the disk-shaped bottom plate 54. The scroll casing 6 is provided so as to cover the outer peripheral portion on the front side where the blades 53 of the driven impeller 51 are provided, and the tubular structure is spiral along the circumferential direction. The swirl is single-layered, and the scroll casing 6 makes a round at a predetermined position on the outer circumference of the driven impeller 51 or along the circumferential direction, and the diameter of the cylinder that swirls as the distance from the predetermined position is along the circumferential direction increases. It is getting bigger. The portion of the scroll casing 6 having the largest diameter is the discharge portion, and a ventilation pipe for discharging air is attached to the discharge portion.
Further, a suction pipe 24 is connected to the inner peripheral side of the scroll casing 6 on the front side of the driven impeller 51. The suction pipe 24 is arranged coaxially with the rotating shaft 5 and is connected to the scroll casing 6 at the center of the front surface of the driven impeller 51. The driven impeller 51 is covered with a bottom plate 54, a scroll casing 6, and a suction pipe 24, and air sucked from the suction pipe 24 is discharged from a ventilation pipe connected to the scroll casing 6. like this. A device including a rotating shaft 5, a driven impeller 51, a bottom plate 54, a scroll casing 6, and a suction pipe 24 is a centrifugal blower or a centrifugal compressor. Such a centrifugal blower uses the rotational energy of a drive impeller, which is a wind turbine, as a power source.
The drive impeller 4 described above, a fixing portion 46 and a casing 45 that rotatably support the drive impeller 4, a speed increaser 7 and the like that accelerate the rotation of the drive impeller 4 and transmit it to the rotation shaft 5. A centrifugal fluid machine is configured from the above-mentioned centrifugal blower.

In the present embodiment, the centrifugal fluid machine is provided with a suction air temperature control mechanism to form an air conditioner. The rear end of the suction pipe 24 is connected to the central portion of the scroll casing 6, and the front end is a suction port that spreads like a trumpet. The suction pipe 24 is arranged coaxially with the rotating shaft 5 and the tubular body 3 and is arranged horizontally. A trumpet-shaped suction port of the suction pipe 24 is arranged in the trumpet-shaped air collecting portion 12.
As shown in FIGS. 3 and 12, a branch pipe 25 branching from the suction pipe 24 is provided between the scroll casing 6 of the suction pipe 24 and the suction port. The branch pipe 25 extends upward in the vertical direction from the horizontal suction pipe 24. Inside the joint portion between the suction pipe 24 and the branch pipe 25, a switching plate (switching means) 55 for switching the inlet of the sucked air is rotated by the motor 56 to block the rear side of the branch portion of the suction pipe 24. The switching plate 55 can be rotationally moved between a vertical state in which the switching pipe 25 is used and a horizontal state in which the upper side of the branch portion of the branch pipe 25 is closed. The position of the suction port for sucking the air for switching the switching plate 55 will be changed.

On the upper side of the frame 2, the above-mentioned heat exchanger 10, the hot water tank 16 and the cold water tank 17 are provided as a suction air temperature control mechanism from the front side, and the hot water solar panel 11 is provided on these. .. Tap water or well water is supplied to the hollow rectangular parallelepiped hot water tank 16 and cold water tank 17 by a pump or the like. Here, the water in the cold water tank 17 may be circulated from well water at a relatively low temperature or cooled by a cooling device using a heat pump or the like, but basically when water is injected as described later. The heat of vaporization is used for cooling. The chilled water tank 17 serves as a cooling means for cooling the heat exchange unit 15 described later. Further, the hot water tank 16 is connected to the hot water solar panel 11 by piping, and water circulates between the hot water tank 16 and the hot water solar panel 11 to raise the water temperature. The hot water tank 16 and the hot water solar panel 11 serve as a heating means for heating the heat exchange unit 15 described later.

The heat exchanger 10 includes a hollow rectangular parallelepiped box 14 whose front side is open, and a heat exchange portion 15 arranged in the front opening of the box 14. The heat exchange unit 15 has, for example, a multi-layer structure in which corrugated cardboard is stacked, and is arranged in a state in which a large number of holes penetrate in the front-rear direction. The direction of this hole is the same as the axial direction of the tubular body 3 and the axial direction of the suction pipe 24. It should be noted that a plurality of thin plates may be arranged in the same direction as in the heat exchanger of an air conditioner. Further, in the present embodiment, the heat exchange unit 15 may be made of paper soaked with water, a fine mesh metal net, or a fibrous metal.

A water pipe connected to the hot water tank 16 and the cold water tank 17 is provided on the upper side of the heat exchange unit 15, and water is supplied from either of the hot water tank 16 and the cold water tank 17 on the heat exchange unit 15. It is designed to supply to a plurality of nozzles 18. Further, in the box 14 of the heat exchanger 10, a branch pipe 25 is arranged so as to penetrate the bottom of the box 14, and a suction port of the branch pipe 25 is arranged at a height position of the heat exchange portion 15.

When the temperature is low, the switching plate 55 is in a state of closing the suction pipe 24 and opening the branch pipe 25, and the heat exchange unit 15 is warmed by the hot water solar panel 11 of the hot water tank 16 from the plurality of nozzles 18. Hot water is supplied by spraying, jetting, etc. to heat the heat exchange unit 15, and the air warmed through the heat exchange unit 15 is sent from the branch pipe 25 to the suction pipe 24 through a centrifugal blower (centrifugal compressor). After being sucked into, it is sent to the ventilation pipe from the scroll casing 6 as a discharge part. The warmed air sent to the ventilation pipe is used to heat the room and replace the air.

When the temperature is high, the switching plate 55 closes the suction pipe 24 to open the branch pipe 25, and the cold water of the cold water tank 17 is supplied from the nozzle 18 to the heat exchange unit 15 by injection or the like to exchange heat. The unit 15 is cooled, and the cooled air that has passed through the heat exchange unit 15 is sucked into the centrifugal blower (centrifugal compressor) from the branch pipe 25 via the suction pipe 24, and then from the scroll casing 6 as the discharge unit. It is sent to the ventilation pipe. The cold air sent to the ventilation pipe is used to cool the room and replace the air.

When the temperature is neither high nor low and the temperature is comfortable to spend, the switching plate 55 is set to a state in which the branch pipe 25 is closed and the suction pipe 24 is opened, and the outside air is taken in as it is to replace the air in the room. By controlling the temperature of the air sucked into the centrifugal fluid machine in this way, it can be used as an air conditioner capable of temperature control. By forcibly introducing air indoors, the indoor odor can be eliminated. The suction pipe 24 may be extended and arranged indoors to exhaust air from an indoor toilet or the like.

The switching plate 55 is rotationally moved by the motor 56 between a state in which the suction pipe 24 is closed and the branch pipe 25 is opened and a state in which the branch pipe 25 is closed and the suction pipe 24 is opened, but a control device (not shown). When the temperature is above the set upper limit temperature or below the set lower limit temperature, the switching plate 55 is brought into a state where the suction pipe 24 is closed and the branch pipe 25 is opened, and the switching plate 55 is below the upper limit temperature and above the lower limit temperature. In this case, the branch pipe 25 may be closed to open the suction pipe 24. Further, the control device provides a valve, a pump, or the like so that cold water is supplied from the cold water tank 17 to the nozzle 18 when the temperature is above the upper limit, and hot water is supplied from the hot water tank 16 to the nozzle 18 when the temperature is below the lower limit. It may be controlled.

The air conditioner 1 having such a configuration is installed and used on, for example, the rooftop of a building. In this case, the air collecting portion 12 of the air conditioner 1 is installed so as to face the windward side.
When the wind flows in from the opening 12a on the front side of the wind collecting portion 12, the flow path cross-sectional area of the wind collecting portion 12 becomes smaller toward the opening 12b on the rear side, so that the wind is throttled and the flow velocity is increased. Then, it flows into the tubular body 3 from the wind collecting portion 12.

When wind flows into the tubular body 3, the wind causes the drive impeller 4 inside the tubular body 3 to rotate. Then, the rotation speed of the drive impeller 4 is accelerated by the speed increaser (planetary gear mechanism) 7 and transmitted to the rotation shaft 5.
When the rotating shaft 5 rotates, the driven impeller 51 rotates, and air is discharged from the ventilation pipe connected to the scroll casing 6 serving as the discharge portion by the centrifugal fluid machine as a centrifugal blower (centrifugal compressor). The air pushed outward by centrifugal force from the driven impeller 51 is compressed and discharged by a diffuser provided in the air flow path from the driven impeller 51 to the scroll casing 6. In the present embodiment, a centrifugal fluid machine is used to blow air from the air conditioner 1, but it can also be used as a device for supplying compressed air, not just blowing air. The power for blowing and compressing is wind power, which can reduce operating costs. Further, when the compressed air is used in the air conditioner 1, the compressed air may be stored in an air tank or the like and then used for air conditioning. In this case, it is possible to blow air for air conditioning without being affected by changes in the strength of the wind. In this case, it is preferable that the heat exchanger 10 supplies air from the air tank to control the temperature.

As described above, the centrifugal fluid machine according to the present embodiment can blow air and compress air by utilizing natural wind. That is, it can be used for ventilation and air compression without the need for power supply equipment. When compressed air with a centrifugal fluid machine, compressed air can be used as a power source for power generation equipment and other mechanical equipment, or for oxygen concentrators using compressed air and zeolite. can. When compressed air is used as a power source, for example, the compressed air may be filled in a high-pressure tank, and the compressed air may be supplied from the high-pressure tank to the cylinder of the engine to operate the engine.

Further, the tubular body 3 is provided with a wind collecting unit 12 for collecting and introducing wind inside the tubular body 3, and the natural wind is efficiently collected by the wind collecting unit 12. Since it can be introduced into the tubular body 3, the drive impeller 4 can be efficiently rotated to obtain compressed air. Further, since the centrifugal fluid machine rotates the driven impeller 51 to blow air and compress the air, the rotation of the drive impeller 4 can be efficiently used.

Further, the speed increaser 7 is composed of a planetary gear mechanism, the ring gear 71 of the planetary gear mechanism is attached to the drive impeller 4, the sun gear 72 is attached to the rotating shaft 5, and the planetary gear 73 is the ring gear 71 and the sun gear. Since it meshes with 72, the speed increase amount of the rotating shaft 5 can be easily adjusted by adjusting the number of teeth and the diameter of the ring gear 71, the planetary gear 73, and the sun gear 72.
In addition, a casing 45 is provided inside the drive impeller 4, a permanent magnet 9 is provided on either one of the drive impeller 4 and the casing, and the coil 8 has a predetermined gap with the permanent magnet 9 on the other. Since it is provided, compressed air can be obtained by rotating the drive impeller 4 by the natural wind, and power can be generated by the cooperation of the permanent magnet 9 and the coil 8. In this case, compressed air can be stored in an air tank and electricity can be stored in a storage battery, and can be used regardless of the presence or absence of wind and the strength of the wind. The generated electricity may be used for a heater or a cooler as a temperature control for the air conditioner 1. Further, when the centrifugal fluid machine is a centrifugal compressor, it may be used for compression and liquefaction of the refrigerant and used as a cooler.

In the present embodiment, the planetary gear mechanism is adopted as the speed increaser 7 that increases the rotation speed of the drive impeller 4 and transmits the rotation speed to the rotation shaft 5, but other various transmissions and speed increase. Machines can be used.

1 Air conditioner 3 Cylindrical body 4 Drive impeller 5 Rotating shaft 6 Scroll casing (casing: discharge part)
7 Accelerator 8 Suction pipe 51 Driven impeller

Claims (3)

A rectangular parallelepiped frame-like frame in which multiple structural materials are connected in a rectangular parallelepiped shape,
A cylindrical body provided on the driving dynamic impeller coaxially inside the frame body,
Provided inside of the tubular body, said drive wheel which is rotated by the wind the wind passing through the inside of the tubular body,
A driven impeller that rotates by transmitting the rotation of the drive impeller, and
The casing that covers the driven impeller and
A suction pipe that sends air sucked into the center side of the driven impeller into the casing,
The casing is provided with a discharge portion which is provided on the casing and discharges air which is sucked in by the center side of the driven impeller and then pushed out by centrifugal force to the outer peripheral side.
The frame body is provided with four fixing rods extending in an oblique direction toward the inside thereof , and one end of these fixing rods is fixed to the structural material.
The fixing rod penetrates a through hole formed in the tubular body, and the through hole and its vicinity are fixed to the fixing rod.
The other end of the fixing rod is fixed to a solid tough,
The fixing portion is provided inside the drive impeller, and the end portion of a cylindrical fixing member that rotatably supports the drive impeller is fixed. .. A rotating shaft that is coaxial with the drive impeller and can rotate around the shaft,
It is equipped with a speed increaser that accelerates the rotation of the drive impeller and transmits it to the rotation shaft.
The centrifugal fluid machine according to claim 1, wherein the driven impeller rotates integrally with the rotating shaft that rotates by transmitting the rotation of the drive impeller. An air conditioner including the centrifugal fluid machine according to claim 1 or 2 and a suction air temperature control mechanism provided on the upper side of the frame of the centrifugal fluid machine.
The suction air temperature control mechanism comprises a heat exchanger, a hot water tank, and cold water tanks, by switching these hot water tank or cold water tank, and a nozzle for supplying water from one to the heat exchanger,
A branch pipe extending upward from the suction pipe of the centrifugal fluid machine and connected to the heat exchanger is provided.
At the joint between the suction pipe and the branch pipe, the suction pipe is closed and the branch pipe is opened, and the branch pipe is closed and the suction pipe is opened. A switching means for switching between the open pipe state is provided, and
When the temperature is low, the branch pipe is opened by the switching means, hot water from the hot water tank is supplied from the nozzle to the heat exchanger to heat the heat exchanger, and the heat exchanger is passed through the heat exchanger. Warm air is sent from the branch pipe through the suction pipe into the casing of the centrifugal hydraulic machine.
When the temperature is high, the branch pipe is opened by the switching means, and the cold water of the cold water tank is supplied from the nozzle to the heat exchanger to cool the heat exchanger and pass through the heat exchanger. The cooled air is sent from the branch pipe through the suction pipe into the casing of the centrifugal fluid machine.
An air conditioner characterized in that when the temperature is neither high nor low, the suction pipe is opened by the switching means and the outside air is directly sent into the casing of the centrifugal fluid machine.

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