JP2001221162A - Portable compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat radiation effect to enhance convenience for use and reduce cost. SOLUTION: A driver 18 is installed on a low temperature tank side of a double-body tank to increase the heat radiation effect. Near a bottom dead center of a high pressure piston 4' of a second stage high pressure cylinder 17, choke action acts and a discharge port for discharging residual pressure air is disposed to smoothen movement the high pressure piston. A bearing case is integral with a filter case 22, and intake air from a filter 14 passes near a bearing to enhance a cooling effect. Therefore, a portable type compressor is compact and structure thereof is simple to reduce the cost, while enhancing convenience for use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The disclosed technology belongs to the technical field of the structure of a portable compression device used for home building and the like.

[0002]

2. Description of the Related Art As is well known, it is firstly desired that a compression device used for construction work such as civil engineering construction be of a lightweight, small and portable type in view of handleability and workability. Conventionally, various types of portable compression devices have been devised and put into practical use.

For example, as shown in FIG. 6, a portable compression device 3 having a frame having handles 1, 1 on both sides and having a double-body type pressure accumulating tank 2, 2 'is movable for high pressure and low pressure. Motors 6, 6 provided between the two pressure accumulating tanks 2, 2 by using pistons 4, 4 'as crank pins 5, 5'.
The type in which a cooling fan 9 is linked to a crankshaft 8 provided on the bearings 7, 7 'is often used.

However, since the portable compressor 3 according to the prior art is small in size, heat is easily collected due to its small size, so that the heat generated by the motors 6 and 6 increases, and heat is transmitted to the crankcase 11 side. The crankcase 1
(1) The temperature of the intake air drawn into the crankcase from the front via the filter 14 rises, leading to a decrease in the suction efficiency and a reduction in the life of the bearings 7, 7 '.

However, in order to suppress the heat generation of the motors 6, 6, an electric cooling fan is separately provided or the cooling fan 9 is provided.
However, there is a disadvantage that the outer diameter must be increased, which results in an increase in cost in size and weight reduction.

In FIG. 6, reference numeral 9 denotes a cooling fan for blowing cooling air to the entire mechanism.

In recent years, there has been a strong demand for improvement in the performance of the compression device, and therefore, a sophisticated motor 6 has been used. In order to perform the operation of the motor 6 precisely and accurately, a driver and a driver have to be used. A complicated structure having a power transistor or an IC, which is referred to as, for example, is mounted between the body of the high-temperature tank 2 and the body of the low-temperature tank 2 '.

However, a driver having a power transistor and an IC for controlling the operation of the elaborate structure of the motor 6 also needs to have a complicated and compact structure. Remarkably,
As the temperature rise increases, a cooling function is strongly required to maintain the characteristics of the driver. To cope with this, a heat sink made of aluminum or the like is attached near the driver, or a small electric cooling fan Or installing cooling.

[0009]

However, as described above, the power transistor, IC, and the like are compactly housed in the kind of driver as described above, so that the structure is extremely fine, and the heat radiation effect as designed is reduced. There is a difficulty that it is difficult to obtain, and if this is performed with an electric cooling fan or the like, the overall structure becomes large, and in order to make it compact, the structure becomes complicated and the cost increases.

Further, when the operation control method of the compression device is an ON / OFF operation using a pressure switch, the residual pressure of the top clearance at the time of stoppage is applied to the high pressure piston 4 '. Go down.

When the motor is restarted, the residual pressure acts on the upper part of the high-pressure piston 4 ', so that the motor cannot be restarted and becomes in a restrained state. There is a disadvantage that it is necessary to discharge the residual pressure in the cylinder via the starting unloader and start the operation, since this has a great influence on the ascent.

Further, there is a demerit that the crank bearing is in a closed position, the effect of the entire cooling fan does not appear, and the life of the bearing is adversely affected.

Thus, when the compression device 3 is at a stop time,
When the piston 4 'of the cylinder 17' on the high pressure side stops near the bottom dead center, it is difficult to restart due to the residual pressure of the compressed air, and it is difficult to re-activate the compression device 3, which is a disadvantage. As shown in FIG. 7, when the pressure switch is turned off, the starting unloader A operates to depress the piston 4 ', release the suction valve, and release the residual pressure in the cylinder 17'. There was a minus point with the procedure.

[0014]

SUMMARY OF THE INVENTION An object of the invention of this application is to provide a technical object to solve the problem of less convenient use of a portable compression device based on the above-mentioned prior art. The basic structure is the same as before, the heat dissipation function of the driver is remarkably promoted, the function at the time of restarting the compressor is improved, and the cooling efficiency of the bearing case and filter case during operation is improved and the life is improved Therefore, it is an object of the present invention to provide an excellent portable compression apparatus which can be used in various fields of compression technology.

[0015]

In order to solve the above-mentioned problems, according to the above-mentioned object, according to the present invention, a motor is provided with a tank, and a compressor is provided in the tank. A portable compression device that is provided in parallel, wherein a cooling mounting plate is disposed on a driver provided on the low temperature side of the tank, and a choke hole is provided in a cylinder of a mounted compressor, and the main component is that The choke hole is provided near the bottom dead center of the high-pressure side cylinder, the bearing bearing portion of the compressor is integrated with the filter case, and the air suction hole of the filter case is disposed near the bearing bearing portion. The driver is provided on the low temperature side of the tank, and the outer diameter of the tank is increased in order to increase the heat transfer efficiency on the low temperature tank side. In which took technical means also adapted are arranged on a mounting plate that is welded to the L-shaped combined.

[0016]

Thus, in the portable compressor described above, the high-temperature tank provided in the motor (which becomes hot because the compressed air of the compressor enters first) and the low-temperature tank (which is cooled to some extent by the high-temperature tank) in the portable compression device. A mounting plate for cooling the driver is welded and fixed to the low-temperature tank side of the tank (the compressed air is connected by a connecting pipe), and a driver is mounted on the mounting plate, and the heat generated by the driver is conducted to the low-temperature tank side for cooling. In addition, by providing a choke hole near the bottom dead center of the high-pressure piston of the high-pressure cylinder of the compressor, the residual pressure is smoothly discharged when the compressor is stopped, and the start-up at the start is started. Without any loader mechanism, it is performed smoothly without any problems, so there is no wasted power loss,
If it is strong, the temperature rise of the motor and the driver can be suppressed. The compressor bearing is integrated with the filter case, and the filter case is provided with a suction hole near the bearing to achieve a cooling effect. It is made to be done.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a description of an embodiment of the invention of this application as an embodiment of the present invention, with reference to FIGS.

Reference numeral 18 denotes a driver for controlling the operation of the extremely compact motor 6 'equipped with a power transistor, an IC and the like. In the invention of this application, FIG. As shown in FIG. 3, an aluminum heat sink 15 provided with a driver board 14 on the lower temperature tank 2 'is mounted on an L-shaped mounting plate 13 corresponding to the outer diameter of the tank. A bridge plate 11 to which an active filter 12 is attached is provided between 2 ′ and the high temperature side tank 2 so that the heat radiation effect is improved.

In the cylinder 17 on the high pressure side, a choke hole 19 for discharging residual pressure air is provided on one side of the lower end of the piston 4 'at a position further from the bottom dead center as shown in FIG. .

In this manner, the pinton 4 '
At the end of the stroke, the residual pressure is discharged out of the system, and is provided as a choke hole for a choke to such an extent that the reciprocating operation compression discharge of the moving piston 4 'is not substantially affected.

The choke hole 19 is, for example,
The pores have a diameter φ of about 0.1 to 1.0.

In order to further promote the cooling effect, not only the connecting members 18, 18 made of copper or the like are provided between the tanks 2, 2 ', but also as shown in FIG. And the filter case 22 are integrated, and a hole 2 is formed in the filter case 22 near the bearing 7 '.
3,23 'are provided and holes 23,23' are provided so as to cover the filter 24.
The cooling air that passes through 4 and is absorbed inside and outside is the holes 23,
23 'Bearing Passes near the bearing part 7' so as to further promote the cooling effect.

The embodiment of the invention of this application is not limited to the above-described embodiment. For example, the aluminum plate of the mounting plate for cooling the driver is mounted on both sides instead of one side. Various aspects can be adopted.

Reference numeral 19 denotes a pipe for supplying compressed air from the high-pressure cylinder to the high-temperature tank 2.

The copper pipe connecting the two tanks 2, 2 'is for improving conductivity.

[0026]

As described above, according to the invention of this application, the compactness of the apparatus is further promoted, the cooling performance of the portable compression apparatus is further improved, the cost is reduced, and the handling is extremely improved. effective.

Further, since the cooling effect is improved, the durability and the service life are also improved, so that an excellent effect that the margin is increased is exhibited.

In the configuration of the compression device equipped with a driver for controlling the operation of the motor, a heat conduction plate is welded to the low temperature side tank of the twin barrel tank according to the outer diameter of the tank, and the driver is attached thereto, and the driver is attached to the tank. By releasing the heat to the low-temperature tank side, the rise in temperature of the driver is suppressed, which eliminates the conduction cooling fan, etc., which is a commonly used physical distribution cooling method, reducing the size and weight, and improving the convenience of use. An excellent effect is obtained that a portable compression device can be provided.

In the ON / OFF control by the pressure switch, when the pressure switch is turned off, the pressure falls to the bottom dead center due to the residual pressure in the cylinder of the piston of the compression device. Because the motor cannot start due to the residual pressure at
By opening a choke hole near the bottom dead center of the high-pressure piston on the high-pressure cylinder side and releasing the residual pressure, the restart is performed smoothly, and starting is performed by a commonly used solenoid valve and unloader piston mechanism The same starting characteristics as those of the unloader method can be obtained, and compactness and cost reduction can be achieved.

If the choke hole passing through the vicinity of the pressure ring at the bottom dead center of the piston is excessively raised to the top dead center, the compressed air is discharged during the compression step and the efficiency is reduced. In particular, it is effective to use it for a high-pressure cylinder on the second stage of a two-stage compressor having a high pressure.

The filter case on the suction side of the compression device and the bearing bearing are integrated, and the bearing is cooled down by miniaturizing and arranging the suction hole near the bearing bearing, so that the life of the bearing is improved. It also has the effect of increasing the durability.

In particular, by forming a small hole having a choke function in the vicinity of the bottom dead center of the piston, the basic effect is obtained that the overall efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a detailed enlarged view of a choke hole 19 of FIG.

FIG. 3 is a detailed diagram illustrating the arrangement of a bearing and a suction hole in FIG. 1;

FIG. 4 is a right side view of FIG. 1 with the driver and the low-temperature side tank mounted.

FIG. 5 is a detailed arrangement diagram of a starting unloader according to the prior art.

FIG. 6 is a plan view of a conventional device.

FIG. 7 is a front view of the same.

[Explanation of symbols]

Reference Signs List 6 motor 2, 2 'high-temperature side tank, low-temperature side tank 4, 4' high-temperature side piston (second stage side), low-temperature side piston (first stage side) 3 portable compression device 9 cooling fan 18 driver 13 mounting plate 19 choke hole 11 Bearing Case 22 Filter Case, Bearing Case Integrated 14 Filter 23,23 'Air Hollow Hole 17,17' High Pressure Cylinder, Low Pressure Cylinder

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[Procedure amendment]

[Submission date] February 21, 2000 (200.2.2
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Portable compression device

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The disclosed technology belongs to the technical field of the structure of a portable compression device used for home building and the like.

[0002]

2. Description of the Related Art As is well known, it is firstly desired that a compression device used for construction work such as civil engineering construction be of a lightweight, small and portable type in view of handleability and workability. Conventionally, various types of portable compression devices have been devised and put into practical use.

For example, as shown in FIG. 6, a portable compression device 3 having a frame having handles 1, 1 on both sides and having a double-body type pressure accumulating tank 2, 2 'is movable for high pressure and low pressure. A motor 6 provided between the two pressure accumulating tanks 2, 2 'by using the pistons 4', 4 as crank pins 5, 5 '.
The type in which a cooling fan 9 is linked to a crankshaft 8 provided on the bearings 7, 7 'is often used.

However, the portable compressor 3 according to the prior art is small in size, so that heat is easily trapped therein. Therefore, the heat generated by the motor 6 increases, and the heat is conducted to the crankcase 11 side. Therefore, the temperature of the intake air sucked into the crankcase from the front of the crankcase 11 through the filter 14 through the filter 14 increases, and the suction efficiency decreases.
In addition, there is a disadvantage that the life of the bearings 7, 7 'and the like is reduced.

However, in order to suppress the heat generated by the motor 6, an electric cooling fan must be provided separately or the outer diameter of the cooling fan 9 must be increased. There was a disadvantage that the cost was high.

In FIG. 6, reference numeral 9 denotes a cooling fan for blowing cooling air to the entire mechanism.

In recent years, there has been a strong demand for improvement in the performance of the compression device, and therefore, a sophisticated motor 6 has been used. In order to perform the operation of the motor 6 precisely and accurately, a driver and a driver have to be used. A complicated structure having a power transistor or an IC, which is referred to as, for example, is mounted between the body of the high-temperature tank 2 and the body of the low-temperature tank 2 '.

However, a driver having a power transistor and an IC for controlling the operation of the elaborate structure of the motor 6 also needs to have a complicated and compact structure. Remarkably,
As the temperature rise increases, a cooling function is strongly required to maintain the characteristics of the driver. To cope with this, a heat sink made of aluminum or the like is attached near the driver, or a small electric cooling fan Or installing cooling.

[0009]

However, as described above, the power transistor, IC, and the like are compactly housed in the kind of driver as described above, so that the structure is extremely fine, and the heat radiation effect as designed is reduced. There is a difficulty that it is difficult to obtain, and if this is performed with an electric cooling fan or the like, the overall structure becomes large, and in order to make it compact, the structure becomes complicated and the cost increases.

Further, when the operation control method of the compression device is an ON / OFF operation using a pressure switch, the residual pressure of the top clearance at the time of stoppage is applied to the high pressure piston 4 '. Go down.

When the motor is restarted, the residual pressure acts on the upper part of the high-pressure piston 4 ', so that the motor cannot be restarted and becomes in a restrained state. There is a disadvantage that it is necessary to discharge the residual pressure in the cylinder via the starting unloader and start the operation, since this has a great influence on the ascent.

Further, there is a demerit that the crank bearing is in a closed position, the effect of the entire cooling fan does not appear, and the life of the bearing is adversely affected.

Thus, when the compression device 3 is at a stop time,
When the piston 4 'of the cylinder 17' on the high pressure side stops near the bottom dead center, it is difficult to restart due to the residual pressure of the compressed air, and it is difficult to re-activate the compression device 3, which is a disadvantage. As shown in FIG. 5, when the pressure switch is turned off, the starting unloader A operates, depresses the unloader piston 24, releases the suction valve, and releases the residual pressure in the cylinder 17 '. There was a minus point in the procedure.

[0014]

SUMMARY OF THE INVENTION An object of the invention of this application is to provide a technical object to solve the problem of less convenient use of a portable compression device based on the above-mentioned prior art. The basic structure is the same as before, the heat dissipation function of the driver is remarkably promoted, the function at the time of restarting the compressor is improved, and the cooling efficiency of the bearing case and filter case during operation is improved and the life is improved Therefore, it is an object of the present invention to provide an excellent portable compression device which can be used for various fields of compression technology in various industries.

[0015]

In order to solve the above-mentioned problems, according to the above-mentioned object, according to the present invention, a motor is provided with a tank, and a compressor is provided in the tank. A portable compression device that is provided in parallel, wherein a cooling mounting plate is disposed on a driver provided on the low temperature side of the tank, and a choke hole is provided in a cylinder of a mounted compressor, and the main component is that The choke hole is provided near the bottom dead center of the cylinder, the bearing bearing portion of the compressor and the filter case are integrated, and the air suction hole of the filter case is disposed near the bearing bearing portion. So that the driver is provided on the low-temperature side of the tank and to increase the heat transfer efficiency on the low-temperature tank side,
Technical measures are taken such that the mounting means is disposed on a mounting plate welded in an L-shape according to the outer diameter of the tank.

[0016]

Thus, in the portable compressor described above, the high-temperature tank provided in the motor (which becomes hot because the compressed air of the compressor enters first) and the low-temperature tank (which is cooled to some extent by the high-temperature tank) in the portable compression device. A mounting plate for cooling the driver is welded and fixed to the low-temperature tank side of the tank (the compressed air is connected by a connecting pipe), and a driver is mounted on the mounting plate, and the heat generated by the driver is conducted to the low-temperature tank side for cooling. In addition, by providing a choke hole near the bottom dead center of the high-pressure piston of the high-pressure cylinder of the compressor, the residual pressure is smoothly discharged when the compressor is stopped, and the start-up at the start is started. Without any loader mechanism, it is performed smoothly without any problems, so there is no wasted power loss,
If it is strong, the temperature rise of the motor and the driver can be suppressed. The compressor bearing is integrated with the filter case, and the filter case is provided with a suction hole near the bearing to achieve a cooling effect. It is made to be done.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described as an embodiment of the present invention with reference to FIGS.

Reference numeral 18 denotes a driver, which is equipped with a power transistor, an IC, and the like, for controlling the operation of the extremely compact motor 6. According to the invention of this application, FIG. As shown in the drawing, an aluminum radiator plate 14 having a driver board 28 provided on the lower temperature tank 2 'is mounted on an L-shaped mounting plate 13 corresponding to the outer diameter of the tank. A bridge plate 27 to which the active filter 12 is attached is provided between the ′ and the high temperature side tank 2 so that the heat radiation effect is better.

In the cylinder 17 'on the high pressure side,
A choke hole 19 for discharging residual pressure air is provided on one side of the lower end of the piston 4 'further from the bottom dead center as shown in FIG.

In this manner, the pinton 4 '
At the end of the stroke, the residual pressure is discharged out of the system, and is provided as a choke hole for a choke to such an extent that the reciprocating operation compression discharge of the moving piston 4 'is not substantially affected.

The choke hole 19 is, for example,
The pores have a diameter of about φ0.1 to φ1.0.

In order to further promote the cooling effect, not only is the connecting body 20 made of copper or the like provided between the tanks 2 and 2 ', but also as shown in FIG. The filter case 22 is provided with holes 23, 23 ′ near the bearing 7 ′ of the filter case 22.
Is provided so as to cover the filter 14, so that the cooling air that passes through the filter 14 and is absorbed inside and outside passes through the holes 23, 23 ', the bearing 7', and the vicinity of the bearing, and further promotes the cooling effect. To do.

The embodiment of the invention of this application is not limited to the above-described embodiment. For example, the aluminum plate of the mounting plate for cooling the driver is mounted on both sides instead of one side. Various aspects can be adopted.

Reference numeral 26 denotes a pipe for supplying compressed air from the high-pressure cylinder head to the high-temperature tank 2.

The copper pipe connecting the two tanks 2, 2 'is for improving conductivity.

[0026]

As described above, according to the invention of this application, the compactness of the apparatus is further promoted, the cooling performance of the portable compression apparatus is further improved, the cost is reduced, and the handling is extremely improved. effective.

Further, since the cooling effect is improved, the durability and the service life are also improved, so that an excellent effect that the margin is increased is exhibited.

In the configuration of the compression device equipped with a driver for controlling the operation of the motor, a heat conduction plate is welded to the low temperature side tank of the twin barrel tank according to the outer diameter of the tank, and the driver is attached thereto, and the driver is attached to the tank. By releasing heat to the low-temperature tank side, the rise in temperature of the driver is suppressed, which eliminates the electric cooling fan, which is a commonly used distribution cooling method, and achieves a reduction in size and weight, and is convenient for use. An excellent effect is obtained that a portable compression device can be provided.

In the ON / OFF control by the pressure switch, when the pressure switch is turned off, the pressure falls to the bottom dead center due to the residual pressure in the cylinder of the piston of the compression device. Because the motor cannot start due to the residual pressure at
By opening a choke hole near the bottom dead center of the high-pressure piston on the high-pressure cylinder side and releasing the residual pressure, the restart is performed smoothly, and starting is performed by a commonly used solenoid valve and unloader piston mechanism The same starting characteristics as those of the unloader method can be obtained, and compactness and cost reduction can be achieved.

If the choke hole passing through the vicinity of the pressure ring at the bottom dead center of the piston is excessively raised to the top dead center, the compressed air is discharged during the compression step and the efficiency is reduced. In particular, it is effective to use it for a high-pressure cylinder on the second stage of a two-stage compressor having a high pressure.

The filter case on the suction side of the compression device and the bearing bearing are integrated, and the bearing is cooled down by miniaturizing and arranging the suction hole near the bearing bearing, so that the life of the bearing is improved. It also has the effect of increasing the durability.

In particular, by forming a small hole having a choke function in the vicinity of the bottom dead center of the piston, the basic effect is obtained that the overall efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a detailed enlarged view of a choke hole 19 of FIG.

FIG. 3 is a detailed diagram illustrating the arrangement of a bearing and a suction hole in FIG. 1;

FIG. 4 is a right side view of FIG. 1 with the driver and the low-temperature side tank mounted.

FIG. 5 is a detailed arrangement diagram of a starting unloader according to the prior art.

FIG. 6 is a plan view of a conventional device.

FIG. 7 is a front view of the same.

[Description of Signs] 6 Motor 2, 2 'High-temperature side tank, Low-temperature side tank 4, 4' Low-pressure side piston (1st stage side), high-pressure side piston (2nd stage side) 3 Portable compression device 9 Cooling fan 18 Driver 13 Mounting plate 19 Choke hole 11 Bearing case 22 Filter case, integrated bearing case 14 Filter 23,23 'Air hollow hole 17,17' Low pressure cylinder, high pressure cylinder 24 Unloader piston 26 High pressure cylinder head and tank connection pipe 27 Bridge plate 28 Driver Base

Claims (5)

[Claims] 1. A portable compression device in which a motor is equipped with a tank and a compressor is provided in the tank.
A portable compression device, wherein a mounting plate for cooling a driver is provided on one side of the tank, and a choke hole is provided in a cylinder of a compressor to be mounted. 2. A portable compression device in which a motor is equipped with a tank and a compressor is attached to the tank.
A portable compression device, wherein a choke hole is provided in a cylinder on one side of a mounted compressor. 3. The portable compression device according to claim 2, wherein the choke hole is provided near a piston bottom dead center of the high pressure side cylinder. 4. The portable compression device according to claim 1, wherein a bearing bearing portion of the compressor and a filter case are integrated, and an air suction hole of the filter case is disposed near the bearing bearing. apparatus. 5. The portable compression device according to claim 1, wherein said driver is provided on the low temperature tank side of both tanks, and is mounted on a mounting plate erected on said low temperature tank side.