JPH0621724U - Air dryer - Google Patents

Abstract

(57) [Summary] [Purpose] Separation and removal of fine particles of water and impurities such as dirt oil from moist air and drying treatment to obtain clean, dry air. [Structure] An air drying screw dryer 20 is attached in the middle of the refrigerant pipe 12 of the refrigerant 11. This screw dryer has a screw-shaped partition plate 23 for forming a screw-shaped air passage that allows moist air to flow from the upper side to the lower side in the cylindrical case 21. The spiral refrigerant pipe portion is disposed along the screw air passage from the lower side to the upper side to dry the moist air. There is an air guide pipe that penetrates the center of the case, has its lower end opened to the case bottom, and has its upper end communicating with the air outlet at the upper end of the case. It has an air inlet which is connected to the upper end side of the screw-shaped air passage and through which moist air is pumped. A drain port 25 for discharging and discharging water molecules, dirty oil, etc. is provided at the lower end of the case of the screw dryer.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air dryer that obtains dry air by using the heat of condensation from a refrigerant circuit to dry the moist air. Of course, water molecules mixed in the moist air are of course dirty oil. It also relates to an air dryer that removes impurities from the product and makes it possible to obtain clean dry air.

[0002]

[Prior art]

 Conventionally, as this type of air dryer, one having a configuration as shown in FIG. 2 is known. To briefly describe this, the air dryer denoted by reference numeral 10 in the figure includes a refrigerant pipeline, which is a closed circuit formed by a refrigerant pipe 12 in which a refrigerant 11 is circulated and fed, for air drying. Then, by using the refrigerant 11 flowing through this refrigerant pipeline, water molecules in moist air are sequentially condensed to separate air and water molecules, whereby dry air can be obtained.

That is, the refrigerant 11 is compressed by the compressor 13 provided in the refrigerant pipeline and then flows through the condenser 14 and the cooling medium dryer 15 which are radiated by the radiation fins 17, and further damp air is dried. After flowing through the heat exchanger 18 for the drying process for the purpose of returning to the compressor, the compressor 13 is returned to and the cycle is repeated thereafter.

Here, in such a heat exchanger 18 for air drying processing, moist air is introduced from an air inlet 181 provided at a lower end side thereof, and the moist air is supplied to the heat exchanger 18. By flowing in contact with the periphery of the refrigerant pipe 12 arranged inside, the water molecules are sequentially condensed by the condensing action of the refrigerant 11.

Then, the condensed water molecules are mixed with air and guided to the air outlet 182 on the upper end side of the heat exchanger 18, and when the water molecules pass through the air outlet 182, the water is drained via the automatic drainer 19. Meanwhile, the dried air is configured to be discharged to the outside from the air outlet 182.

The pressure of the refrigerant 11 is appropriately controlled by a pressure control valve 16 provided in the middle of the refrigerant pipe 12 that bypass-connects the downstream side of the refrigerant dryer 15 and the upstream side of the condenser 14 in the refrigerant pipeline. The pressure and the amount of the refrigerant 11 flowing to the exchanger 18 side are controlled.

[0007]

[Problems to be solved by the device]

 However, according to the conventional air dryer 10 described above, some of the air that passes through the heat exchanger 18 for air drying processing and is discharged from the air outlet 182 contains impurities such as fine moisture particles and dirty oil. However, it was unavoidable that they would be mixed together and discharged from the air outlet 182.

In the conventional air dryer 10, it is practically difficult to reliably obtain dry air from moist air, and such a problem is particularly difficult. In particular, when water molecules and dirty oil are mixed, it is desirable to take some measures to solve such problems.

The present invention has been made in view of the above circumstances, and is suitable for not only water molecules mixed in the air, which is obtained by drying moist air in a required state, and dirty oil or the like. The purpose of the present invention is to obtain an air dryer that can obtain dry air that has been cleanly separated and removed.

[0010]

[Means for Solving the Problems]

 In order to meet such a demand, the air dryer according to the present invention has an air drying treatment section in a refrigerant circuit in which humid air in a cylindrical case is made to flow downward from above through a screw-like air passage, and the screw-like air passage is used. The heat is condensed by using the heat of condensation of the refrigerant in the refrigerant pipe spirally arranged from the bottom to the top along the air passage, and at the same time, the lower end is placed in the center of the tubular case and the bottom is the case bottom. An air guide pipe having an upper end communicating with the air outlet is provided at the upper end of the screw-shaped air passage, and an air inlet for compressing and introducing moist air is introduced into the upper end of the screw-shaped air passage. It is composed of a cru dryer.

[0011]

[Action]

 According to the present invention, the moist air is introduced into the screw dryer for the air drying process, and the screw-shaped air passage in the screw dryer flows spirally from the upper side to the lower side, so that the moist air is attached along the screw dryer. Water molecules are condensed by the cooling medium flowing inside the refrigerant pipe, and the moist air at the air inlet is compressed and swirled in a spiral shape to mix with the moist air. Due to centrifugal force, fine particles of water molecules and contaminants such as dirty oil flow downward while colliding with the inner wall of the screen dryer, and drain from the drain port on the lower end side of the cylindrical case through the automatic drainer. On the other hand, the air is guided upward from the lower end opening of the air guide pipe, and is further dried by the refrigerant inside the air guide pipe while being fed to the upper end side, and the air outlet Clean dry air that is RaKiyoshi purification would get.

[0012]

【Example】

 FIG. 1 shows an embodiment of an air dryer according to the present invention, in which the same or corresponding parts as those in FIG. 2 described above are designated by the same reference numerals. Here, the air dryer 10 according to the present invention, like the conventional air dryer, circulates the refrigerant 11 in the refrigerant pipeline by the refrigerant pipe 12 which is a closed circuit, so that the refrigerant 11 is circulated. After being compressed by the compressor 13, the refrigerant flows through the condenser 14 and the refrigerant dryer 15, and the heat is dissipated by the radiating fins 17 in the middle thereof, and the pressure of the refrigerant 11 is controlled by the pressure control valve 16.

In such a refrigerant circuit, the difference from the conventional example is that the refrigerant 11 is guided by the refrigerant pipe 12 and flows through the screw dryer 20 for air drying processing. As is apparent from FIG. 1, the screw dryer 20 for air drying treatment includes a case 21 having a substantially cylindrical shape, and a lower end of the cylindrical case 21 having an opening at the bottom side and an upper end at the cylindrical case 21. An air guide pipe 22 communicating with an air outlet 212 provided at the upper end of the is installed. A screw-shaped partition plate 23 is provided in the peripheral portion of the air guide pipe 22 from the upper end side to the lower end side to form a screw-shaped air passage.

On the other hand, the refrigerant pipe 12 is provided so as to swirl from the lower end side to the upper end side around the air guide pipe 22 along the screw-shaped air passage, and the refrigerant pipe 12 of the screw-shaped partition plate 23 and the cylindrical case 21 is provided. A small gap is left between the inner side and the inner side to form a drainage groove 24, and condensed water molecules and impurities such as dirty oil mixed in the air flow downward.

Furthermore, the bottom side of the cylindrical case 21 is formed in a substantially conical shape, and the lower end thereof is a drainage port 25, which is connected to an automatic drainer 19 to remove water molecules and dirt. Impurities such as oil are automatically drained and discharged.

Further, an air inlet 211 connected to the screw-shaped air passage is provided on a side portion on an upper end side of the cylindrical case 21, and air entering the screw dryer 20 is provided in the air inlet 211 portion. A compressor 30 for compressing and feeding is attached.

Further, an air outlet 212 communicating with the air guide pipe 22 is provided at the upper end of the cylindrical case 21, and the clean air that has been dried is discharged from the air outlet 212.

Further, according to the above-mentioned configuration, when the moist air enters the screw dryer 20 for the air drying process from the air inlet 211, it is moistened by the refrigerant 11 flowing in the refrigerant pipe 12 in the screw dryer 20. Water molecules are condensed from the air.

In particular, this effect is that the moist air spirally flows through the screw-like air passage in the screw dryer 20 from the upper side to the lower side, so that the refrigerant flowing in the refrigerant pipe 12 attached along the spiral air passage. It will be readily understood that by 11, the order is condensed from moist air to water molecules.

Further, the moist air is compressed and fed by the compressor 30 provided near the air inlet 211, and the air and impurities such as water molecules and dirty oil mixed therein are screw-shaped partition plates. Due to the swirling and swirling flow in the air passage partitioned by 23, the fine particles of water and the fine particles of dirty oil mixed in the air are dispersed in the inner wall of the screw dryer 30 for the purpose of centrifugal force. It flows downward while colliding with the groove wall of the cylindrical drainage groove 24.

By doing so, impurities such as water molecules and dirty oil flow downward toward the bottom of the screw dryer 20 while condensing and separating one by one in the screw air passage. That is, the automatic drainer 19 drains and discharges the water from the drainage port 25 on the lower end side of the tubular case 21 which constitutes this.

On the other hand, clean dry air from which water molecules and dirty oil have been separated and removed is guided upward from the lower end opening of the air guide pipe 22 inside the cylindrical case 21, and inside the inside thereof is cooled by the cooling medium 11. Further, while being dried, it is fed to the upper end side, and it becomes possible to discharge purified clean dry air from the air outlet 212 above it.

Therefore, according to the above-mentioned configuration, despite the simple structure, the impurities such as water molecules and dirty oil mixed in the air are swirled in the screw-like air passage in a swirling manner. This makes it very easy to remove easily and reliably and to obtain clean, clean dry air.

The present invention is not limited to the structure of the embodiment described above, and it is needless to say that the shape, structure, etc. of each part of the air dryer 10 can be appropriately modified and changed, and various modifications can be considered. See.

[0025]

[Effect of device]

 As described above, according to the air dryer of the present invention, the humid air in the cylindrical case is caused to flow from the upper side to the lower side through the screw-shaped air passage to the drying processing section in the refrigerant circuit for air drying. Along with this screw-shaped air passage, the refrigerant pipe spirally arranged from the lower side to the upper side is used for the drying process, and the lower end of the cylindrical case is opened in the center of the cylindrical case and the upper end is opened. An air guide pipe communicating with the air outlet is provided, and a screw dryer for air drying treatment having an air inlet for compressing and introducing moist air is provided on the upper end side of the screw-shaped air passage. Despite the structure, impurities such as water molecules and dirty oil mixed in the air can be easily and reliably removed by the spirally swirling flow in the screw-shaped air passage. In it provides the cleaned to obtain dry air with excellent practical that very easily performed effectively.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of an air dryer according to the present invention.

FIG. 2 is a diagram showing a schematic configuration of a conventional air dryer.

[Explanation of symbols]

 10 Air Dryer 11 Refrigerant 12 Refrigerant Pipe Constituting Closed Refrigerant Circuit 13 Compressor for Refrigerant Compression 14 Condenser 15 Refrigerant Dryer 16 Pressure Control Valve 17 Radiating Fin 19 Automatic Drainer 20 Air Drying Screw Dryer 21 Cylindrical Case 22 Air Guide pipe 23 Screw-like partition plate 24 Drain groove 30 Compressor for air compression 211 Air inlet 212 Air outlet

Claims (1)

[Scope of utility model registration request] 1. A refrigerant which is circulated and fed in a refrigerant pipeline formed of a closed circuit is compressed by a compressor, and then a condenser and a refrigerant dryer are caused to flow while radiating heat by a heat radiating fin, and an air drying processing section is used. In the air dryer provided with the air drying refrigerant circuit configured to control the pressure of the refrigerant to the air drying processing section by the pressure control valve while returning to the compressor, By a screw-shaped air passage formed by a screw-shaped partition plate so as to circulate in a cylindrical case from the upper side to the lower side, and a refrigerant flowing in the spiral shape arranged from the lower side to the upper side along the screw-shaped air passage. A spiral refrigerant pipeline part for drying the moist air, and a lower end part that penetrates the central part of the cylindrical case. An air guide pipe having an opening at the bottom of the case and an upper end communicating with an air outlet at the upper end of the case, and an air inlet connected to the upper end of the screw-shaped air passage for compressing and introducing the moist air And a discharge section for discharging water molecules and dirt oil separated and removed from moist air at the lower end of the cylindrical case of the screw dryer. Characteristic air dryer.