JP3266989B2 - Dry compressed air supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry compressed air supply device for supplying dry compressed air to an operating device.

[0002]

2. Description of the Related Art Conventionally, a dry compressed air supply device has been used to supply compressed air to a working device that does not like moisture. This apparatus generally includes an air compressor for compressing and discharging air taken in from the outside, an air dryer for drying compressed air, and a storage tank for storing dry compressed air. As the air dryer, a manual dryer, a heatless dryer, a refrigeration dryer, and the like are used.

[0003] In the above manual dryer, a non-renewable desiccant is filled in a dehumidifying cylinder having an air inlet and an outlet, and the dehumidifying cylinder is dried by passing compressed air through the dehumidifying cylinder. Further, the heatless type dryer connects a dehumidifying cylinder filled with a renewable desiccant via a plurality of solenoid valves or the like, and switches the opening and closing of the solenoid valve to dry the air and regenerate the desiccant in each dehumidifying cylinder. The operation is performed alternately to enable continuous operation.

The refrigeration dryer uses a refrigeration cycle having a compressor, a condenser, an expansion valve, and an evaporator.
The compressed air is passed around the evaporator to cool and dehumidify.

[0005]

In the dry compressed air supply device, water is generated by drying air in an air dryer. The water generated by the air dryer is generally discharged from a discharge port provided in the air dryer, and is discharged to the outside through drain equipment such as a discharge pipe. However, if there is no drain equipment at the installation location of the dry compressed air supply device, there is no place to discharge water generated by the air dryer, which may cause trouble.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a method of draining water generated by an air dryer is devised so that a dry compressed air supply which can be installed in a place without a drain facility without trouble. It is an object of the present invention to provide an apparatus.

[0007]

A first aspect of the present invention to solve the above-mentioned problems is to provide an air compressor provided with a cooling blower and an air dryer provided with a drain pipe for discharging water generated by drying air. And a cooling air blower, wherein the outlet of the drainage pipe extending from the air dryer faces the middle of the flow path of the cooling air generated by the cooling blower, and water dripped from the drainage pipe. Is included in the cooling air to be released into the atmosphere.

[0008] It is preferable that the outlet of the drainage pipe is located in the middle of the flow path of the high-temperature cooling air by cooling the hot part of the air compressor. This is because, as the temperature of the cooling air is higher, the saturated vapor amount of air at the interface in contact with water dropped from the drain pipe increases, and the evaporation amount of the water also increases. Further, it is preferable that the outlet of the drainage pipe faces the middle of the flow path where the wind speed of the cooling air is as high as possible. This is because the greater the velocity of the cooling air that comes in contact with the water dropped from the drain pipe, the greater the amount of evaporation of the water.

According to a second aspect of the present invention, there is provided a dry compressed air supply apparatus including an air compressor and an air dryer having a drain pipe for discharging water generated by drying air. The outlet of the drain pipe extending from the air dryer is located at the hot part of the air compressor, and the water dropped from the drain pipe to the hot part is vaporized by the heat of the hot part and released into the atmosphere. A new means is adopted.

[0010] The high heat part of the air compressor is as follows.
It is preferable to use a discharge pipe or a discharge section of the compressor body. Further, the types of the air compressor and the air dryer used in the first invention and the second invention are not particularly limited.

[0011]

In the dry compressed air supply device according to the first aspect of the present invention, the water generated by the air dryer is guided to the middle of the flow path of the cooling air generated by the cooling blower of the air compressor through the drain pipe. The water dropped from the pipe is brought into contact with the cooling air to evaporate the water with an evaporation amount corresponding to the temperature and the speed of the cooling air. For this reason, water dropped from the drain pipe can be included in the cooling air and released into the atmosphere as so-called humid air.

Further, in the dry compressed air supply device according to the second aspect of the present invention, the water generated from the air dryer is dropped onto the high-temperature portion of the air compressor via the drain pipe, so that the water dropped from the drain pipe is removed. It can be released into the atmosphere by evaporating with the heat of the hot part.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The dry compressed air supply device of the present invention will be specifically described below with reference to embodiments. As shown in the schematic diagram of FIG. 1, a drive shaft 3 of an air compressor 2 disposed in a compressor casing 1 projects from the casing 1, and a first pulley 4 is attached to an end of the drive shaft 3. ing. A motor 5 is provided below the compressor casing 1, and a belt 8 is stretched over a second pulley 7 attached to a rotating shaft 6 of the motor 5 and the first pulley 4. Thus, the air compressor 2 is driven using the motor 5 as a drive source.

A cooling blower 9 for cooling the hot part of the air compressor 2 is attached to the tip of the rotating shaft 6 of the motor 5. The cooling blower 9 is arranged in a blower duct 10 having a suction port 10 a at one end, and the other end of the blower duct 10 is connected to one end of the compressor casing 1. Thus, when the blower 9 rotates together with the rotation of the motor 5, air is sucked into the blow duct 10 from the suction port 10 a, and the cooling air is forcibly blown into the casing 1 through the blow duct 10.
The other end of the compressor casing 1 is a discharge port 1a that communicates with the atmosphere. In FIG. 1, solid arrows indicate the flow of the cooling air.

An air dryer 11 is provided above the compressor casing 1. The air dryer 11 includes a refrigeration dryer using a refrigeration cycle having a compressor, a condenser, an expansion valve, and an evaporator (not shown). The compressed air compressed by the air compressor 2 is guided into the air dryer 11 through the discharge pipe 12 of the air compressor 2, and is cooled when passing around the evaporator (not shown) of the air dryer 11. It is designed to be dried by dehumidification.

The dried compressed air dried by the air dryer 11 is guided to an air storage section 14 connected to the air dryer 11 through a connection pipe 13 and stored therein. The air is supplied to an operating device (not shown) that requires air. Now, in the dry compressed air supply device of the present embodiment, an auto drain trap 16 having a drain pipe 15 is attached to the air dryer 11. The auto drain trap 16 is a device for discharging condensed water generated by drying compressed air around an evaporator (not shown) of the air dryer 11. The outlet of the drain pipe 15 connected to the auto drain trap 16 is located in the compressor casing 1. Specifically, drain pipe 1
The pipe port 5 is placed on the discharge pipe 12 located in the compressor casing 1 and in the middle of the flow path of the cooling air after cooling the hot part of the main body of the air compressor 2. The water which is located above the closed lid-shaped box-shaped water reservoir 17 and which is dropped from the mouth of the drain pipe 15 is dropped into the water reservoir 17. The water reservoir 17 is formed of a metal having high heat conductivity.

When the motor 5 rotates, the dry compressed air supply device according to the present embodiment having the above-described configuration operates as follows.
The air compressor 2 is driven via the belt 8 and the first pulley 4 to perform a compression operation. Further, when the cooling blower 9 is rotated by the rotation of the motor 5, the cooling air generated by the suction of the air from the suction port 10 a is forcibly blown into the compressor casing 1 through the blowing duct 10. The cooling air cools the hot part of the air compressor 2 and then cools the outlet 1
a is released into the atmosphere. On the other hand, the compressed air compressed by the air compressor 2 is supplied through the discharge pipe 12 to the air dryer 1.
After passing through the evaporator (not shown) of the operating refrigeration cycle, it is dried by dehumidification and then guided through the connecting pipe 13 into the storage tank portion 14 to be stored.

The condensed water generated around the evaporator (not shown) of the air dryer 11 is discharged to the auto drain trap 1.
6 and the drain pipe 15, the discharge pipe 12 is located in the compressor casing 1 and is located in the middle of the flow path of the cooling air after cooling the high-temperature portion of the main body of the air compressor 2. Is dropped into the water reservoir 17 placed on the surface. Since the discharge pipe 12 has a high temperature due to the compression heat of the air compressor 2, the water reservoir 17 mounted on the discharge pipe 12 has a high temperature. For this reason, the water dropped from the drain pipe 15 to the water reservoir 17 is vaporized by the heat of the water reservoir 17, and is discharged into the atmosphere from the discharge port 1a together with the cooling air. Further, since the cooling air cools the high-temperature portion of the main body of the air compressor 2 and has a high temperature, the air existing at the interface with the water dropped from the drain pipe also has a high temperature and the saturated steam amount is low. And the water can be more quickly evaporated.

Further, in the above embodiment, the drain pipe 15
The water is dripped into the water reservoir 17 placed on the discharge pipe 12 from above, so that the compressed air flowing in the discharge pipe 12 can be efficiently cooled by the water. (Other Embodiments) In the dry compressed air supply apparatus of this embodiment, as schematically shown in FIG. 2, the water reservoir 17 is provided with a high heat portion of the main body of the air compressor 2, that is, the discharge of the air compressor 2. The drainage pipe 15 is placed on the port 21 with the mouth of the drainage pipe 15 facing above the water reservoir 17, and the other configuration is the same as that of the above embodiment.

Also in this dry compressed air supply device, the water generated in the air dryer 11 is guided through the drain pipe 15 to the middle of the flow path of the cooling air and to the high heat portion of the air compressor 2.
The water can be effectively evaporated and released into the atmosphere together with the cooling air. In each of the above embodiments, the water reservoir 17 is placed directly in the middle of the flow of the cooling air and on a high-temperature portion such as the discharge pipe 12 or the discharge port 21 of the air compressor 2. However, as shown in FIG. 3, the water reservoir 17 may be mounted on a support 17a separately provided in the middle of the cooling air flow path.

[0021]

As described above in detail, in the dry compressed air supply apparatus according to the first and second aspects of the present invention, the water generated by the air dryer is supplied through the drain pipe to the middle of the cooling air flow path or the air compression. The water dripping from the drainpipe can be discharged into the atmosphere by guiding the hot water to the hot section of the machine. Therefore, the dry compressed air supply device of the first invention and the second invention can be installed without any support in a place where there is no drain facility and there is no water discharge destination.

In the dry compressed air supply device according to the second aspect of the present invention, it is possible to efficiently cool the hot section of the air compressor by dropping water from the drain pipe to the hot section of the air compressor. Becomes

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an embodiment of a dry compressed air supply device according to the present invention.

FIG. 2 is a schematic diagram for explaining another embodiment of the dry compressed air supply device of the present invention.

FIG. 3 is a schematic diagram illustrating still another embodiment of the dry compressed air supply device of the present invention.

[Explanation of symbols]

2 ... Air compressor 5 ... Motor 9
... Blower for cooling 10 ... Blower duct 11 ... Air dryer 1
2: discharge pipe 15: drain pipe 17: water reservoir

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F04B 39/16 F04B 41/00

Claims (2)

(57) [Claims] 1. A dry compressed air supply device comprising: an air compressor having a cooling blower; and an air dryer having a drain pipe for discharging water generated by drying air. The outlet of the drainage pipe extending from the cooling air blower faces the middle of the flow path of the cooling air generated by the cooling blower, so that water dropped from the drainage pipe is included in the cooling air and discharged to the atmosphere. A dry compressed air supply device comprising: 2. A dry compressed air supply apparatus comprising: an air compressor; and an air dryer having a drain pipe for discharging water generated by drying air, wherein the drain pipe extends from the air dryer. The outlet of the air compressor is located at a high heat portion of the air compressor, and water dropped from the drain pipe to the high heat portion is vaporized by the heat of the high heat portion and released to the atmosphere. Dry compressed air supply.