KR19980012685U - Heat exchanger for compressed air dehumidifier - Google Patents

Abstract

The present invention relates to a heat exchange apparatus for cooling in a compressed air dehumidifier for removing moisture by cooling compressed air.

According to an aspect of the present invention, there is provided a heat exchange apparatus comprising: a primary heat exchange unit in which moisture introduced by a plurality of outlet pipes arranged in a circumferential manner is heat exchanged between a heat outer casing and an inner cell installed inside the outer casing; The first reverse exchanged air is composed of a secondary heat exchanger for secondary heat exchange while passing through an evaporator installed inside the inner cell;

The secondary heat exchanged air is discharged to the outlet through the outlet pipe of the primary heat exchange unit. Therefore, in order to increase the heat exchange area by increasing the heat exchange efficiency by the primary heat exchange and the secondary heat exchange, the outlet pipe arranged in a circumferential shape is provided with baffles in a zigzag shape in the horizontal direction.

Description

Heat exchanger for compressed air dehumidifier

1 is a schematic diagram of a heat exchanger according to the present invention.

2 is an exploded perspective view of the heat exchanger according to the present invention.

3 is a partially cutaway perspective view of the coupling state of the heat exchanger according to the present invention.

Figure 4 is a schematic cross-sectional view showing a heat exchange passage of the air of the heat exchanger according to the present invention.

Explanation of symbols on the main parts of the drawings

1 ...... Entrance 2 ..... Exit

10 ..... 1st heat exchanger 12 ..... outlet pipe

14 ..... Internal Cell 16 ..... Block

20 .... outer casing 30 .... secondary heat exchanger

32 .... Evaporator 40 ..... Refrigeration Cycle

The present invention relates to a heat exchanger for a compressed air dehumidifier, and more particularly to a heat exchanger used to remove moisture from the compressed air.

Refrigerated Air Dryer is a dehumidifier that removes moisture from the compressed hot air.The basic principle is to bring the compressed hot air into contact with the cold in the heat exchanger, and the dew formation caused by the temperature difference between the cold and the air. To remove moisture.

Looking at the conventional apparatus used to remove moisture in such a refrigerated air dryer, by simply passing the compressed air through the capillary tube into the heat exchanger through which the high-temperature compressed air flows through the refrigerant, the dew outside phenomenon of the capillary tube It takes a primary heat exchange method to remove moisture that forms on the surface.

In the conventional air dryer, only a primary heat exchange is used, and thus, a fatal disadvantage of insufficient efficiency of dehumidification is pointed out. In addition, a pressure reduction phenomenon in which the pressure of the compressed air is lowered may occur in the process of passing the compressed air through the capillary tube.

And since the apparatus for heat exchange is large because it depends on the primary heat exchange method, there is a problem that the dehumidification efficiency is substantially low. That is, due to the disadvantage of excessive size of the heat exchanger compared to the function, it is a reality that does not achieve miniaturization and high efficiency.

The present invention is to solve this disadvantage, it is an object to provide a heat exchange device for a compressed air dehumidifier having a sufficient dehumidification effect through the primary and secondary heat exchange.

Another object of the present invention is to provide a compressed air dehumidifier having a sufficient dehumidification effect.

Compressed air dehumidifier according to the present invention for achieving the above object, the primary heat exchanged by the plurality of outlet pipes installed in the circumferentially between the outer casing and the inner cell installed in the outer casing primary A heat exchanger; The primary heat exchanged air is composed of a secondary heat exchanger for secondary heat exchange while passing through an evaporator installed inside the inner cell; The secondary heat exchanged air is discharged to the outlet through the outlet pipe of the primary heat exchange unit. That is, the secondary heat exchange by the evaporator is performed in the state which heat-exchanged preliminarily with the air which injected the air of the secondary heat exchanged cold state.

Also in the primary heat exchange, in order to increase the heat exchange area between the air to be injected and the outlet pipe of the primary heat exchange unit, the outlet pipe arranged in a circumferential shape is provided with a baffle in a zigzag shape in the horizontal direction to exchange heat exchange efficiency. To increase.

According to the compressed air dehumidifier according to the present invention, which is configured as described above, it is characterized in that the whole is small and has a high dehumidification efficiency through primary and secondary heat exchange, which will be described below based on the embodiment shown in the drawings. The invention will be described in more detail.

The compressed air dehumidifier (hereinafter referred to as dehumidifier) according to the present invention freezes the air heat-exchanged with the primary heat exchanger 10 for performing heat exchange to induce dew condensation with the introduced air. Second heat exchanger 30 for removing moisture while performing a second heat exchange through the cycle evaporator.

First, referring to Figure 1, the overall configuration and principle of the heat exchanger of the dehumidifier according to the present invention will be described.

First, high temperature compressed air is introduced into the inlet 1. Compressed air to be introduced is in a state of high humidity and temperature. The injected air changes to a lower temperature while in contact with the outside of the relatively low temperature outlet pipe 12 in the primary heat exchange unit 10. At this time, the outside of the outlet pipe 12 forms a water droplet due to dew condensation is the first dehumidification.

The air passing through the primary heat exchange unit 10 passes through the secondary heat exchange unit 30. The secondary heat exchanger becomes lower again while passing through the heat radiation fin of the evaporator 32 of the refrigerating cycle 40, and the water droplets form on the outside of the evaporator 32 due to the dew condensation as the temperature changes. Car dehumidification is in progress. The air having completed the secondary dehumidification proceeds to the outlet pipe 12 and is discharged to the outlet 2 and supplied to a desired place.

Here, the refrigeration cycle 40 is the same as the general refrigeration cycle 40 that performs heat exchange through vaporization of the refrigerant in the evaporator 32 using the refrigerant. The constitution includes: an evaporator 30 through which heat exchange proceeds while the liquid refrigerant evaporates, a compressor 42 for compressing the gaseous refrigerant from the evaporator, and a condenser for condensing the high temperature and high pressure gas refrigerant in the compressor. (44), and includes a capillary tube 46 for making the refrigerant out of the condenser 44 to a low-pressure liquid and the same as the configuration of a general refrigeration cycle, a detailed description thereof will be omitted.

The primary heat exchanger 10 and the secondary heat exchanger 30 as described above are mounted inside the outer casing 20, with reference to FIGS. 2 and 3 for more detailed description of the respective components. I will explain.

The primary heat exchange unit 10 is composed of an outer casing 20 and a plurality of outlet pipes 12 mounted on an inner surface thereof. The outlet pipe 12 refers to a connection pipe through which relatively low temperature air is discharged to the outlet 2 in a state where secondary dehumidification is completed. That is, the air introduced from the inlet 1 passes through the passage A between the outlet pipe 12 and the outer casing 20.

That is, the air introduced through the inlet 1 flows through the outside of the outlet pipe 12 installed along the inner edge of the outer casing 20 and flows to the front side in the drawing, so that the inside of the low temperature outlet pipe 12 Water droplets are formed on the outside of the outlet pipe 12 due to the temperature difference with the air. In the present specification, the rear means the direction in which the inlet 1 is installed, and the front will be used as the opposite side, that is, the front direction on the drawing.

The primary heat exchange part 10 is a space provided between the inner cell 14 and the edge side of the upper portion of the outer casing 20. In addition, a passage B for accommodating the evaporator 32 is formed inside the inner shell 14 in a compartment. A plurality of outlet pipes 12 are provided only on the upper side of the outer periphery edge of the inner cell 14, and an inner surface and an inner surface of the outer casing 20 by a blocking film 16 below the outlet pipe 12. The outer surface of the cell 12 is blocked in the vertical direction to form the passage A. As shown in FIG. In addition, the blocking film 16 is in a state in which a part of the front is opened with the inner circumference of the outer casing 20, so that air primarily heat-exchanged in the passage A receives the outside of the inner cell 14 and the outer casing 20. It is supplied to the rear with the inlet 1 again through the passage C between the inner side of the back side.

In summary, a constant passage A is formed between the outer casing 20 and the inner cell 14, and a plurality of outlet pipes 12 are designed in the passage A. 12 is adapted to be connected to the outlet 2. The passage A refers to an upper passage between the inner cell 14 and the outer casing 20 spaced apart from the upper and lower portions by the blocking film 16, and the front portion of the blocking film 16 is the passage A. ) To induce the primary heat exchanged air into the passage (C) at the bottom of the outer casing.

That is, between the outer casing 20 and the inner cell 14 is divided into an upper passage A and a lower passage C by the blocking film 16, but the passage A and the passage C are: In communication with each other at the front part, dehumidified air is first introduced into the passage C while being primarily heat exchanged on the passage A.

The air flowing through the passage A flows in a zigzag direction on the passage by a plurality of baffles 17 zigzagly attached to the passage A in the transverse direction to perform sufficient heat exchange.

Air guided to the passage C flows back to the rear side. The passage C communicates with the passage B, which is an internal passage of the inner cell 14, at the rear. Thus, air in the passage C is led to the passage B. In the passage B, the evaporator 32 of the refrigerating cycle 40 is built in, and the heat exchange with the evaporator 32 lowers the confusion, and dewing occurs due to the temperature difference. , Secondary dehumidification is carried out.

Of course, the evaporator 32 is provided with a plurality of heat radiation fins 34, so that the heat exchange will be more efficiently performed.

The evaporator 32 is connected to a general refrigerating cycle 40 so that low-temperature liquid refrigerant passes through the plurality of refrigerant pipes 36 to perform heat exchange with external air.

The air which has undergone secondary heat exchange and dehumidification while flowing to the front side through the passage B is supplied through the plurality of outlet pipes 12 connected to the passage B from the front side.

At this time, the temperature of the outlet pipe 12 is a low temperature state through the primary and secondary heat exchange. The dehumidified low-temperature air flowing through the outlet pipe 12 heats up on the passage A with the high-temperature, high-pressure air that enters through the inlet 1, so that the temperature rises relatively, and as a result, it becomes a high temperature state. Relative humidity is even lower.

The flow of air according to the present invention configured as described above is summarized through FIG. 4 as follows. The flow for dehumidifying the air in the dehumidifier according to the present invention is described through the passages A, B and C, which passages A, B and C are clearly shown in FIGS. However, the overall air flow will be summarized with reference to FIG.

The passage A is a passage formed between the outer casing 20 and the inner cell 14, which flows high-temperature, high-pressure air introduced from the inlet 1. The passage A is in communication with the passage C formed separately by the blocking film 16 between the outer casing 20 and the inner cell 14 at the front portion opposite to the inlet 1.

That is, between the outer casing 20 and the inner cell 14 is formed into a separate compartment by a blocking film 16 designed to block the gap between the outer casing 20 and the inner cell 14 to form a passage A and a passage C, respectively. On the front side, the passage A and the passage C are connected to communicate with each other. The passage A is provided with a plurality of outlet pipes 12 through which low-temperature air flows up to secondary dehumidification, and is connected to the outlet 2.

The air introduced from the inlet 1 by the primary heat exchanger 10 flows to the outside of the outlet pipe 12 in the passage A while the temperature decreases first, and the primary dehumidification proceeds due to dew formation. do

The primary dehumidified air flows backward through the passage C, and in the rear, the passage C is connected to the passage B. The passage B refers to an interior passage of the inner cell 14 as a space in which the evaporator 32 is embedded. Flowing toward the front side in the passage (B), as the heat exchange proceeds with the plurality of heat dissipation fins 34 of the evaporator 32 changes to a low temperature, water droplets are formed on the outer surface of the heat dissipation fins 34, and the secondary dehumidification proceeds. The passage B communicates with the plurality of outlet pipes 12 at the front side, so that the secondary dehumidified air is led to the outlet 2 along the outlet pipe 12. At this time, the outlet pipe 12 is to pass through the interior of the passage (A), the air introduced from the inlet (1) inside the passage (A) is in contact with the low-temperature outlet pipe 12, the primary heat exchange And dehumidification.

In the dehumidification by the primary heat exchange, the flow of the introduced air is guided zigzag by a plurality of baffles 17 zigzag in the transverse direction in the passage A, and sufficient primary heat exchange with the outlet pipe 12 is performed. In this primary heat exchange unit, dehumidification is substantially performed at about 60 to 70%.

In addition, by the first heat exchange and the second heat exchange, water droplets formed on the outside of the outlet pipe 12 and the outside of the heat dissipation fin 34 will freely fall and be induced to the lower surface of the outer casing 20. Where the dehumidified water is collected, the drain 22 is installed to discharge only the water to the outside regardless of the pressure change of the internal air.

According to the present invention as described above is expected to use the following effects.

First, it can be seen that dehumidification efficiency is improved by enabling sufficient heat exchange by primary heat exchange and secondary heat exchange.

In particular, the outlet pipe 12 acting as a low temperature medium in the primary heat exchange is to occupy as much area as possible in the passage A. For this purpose, the area of the passage A is made larger than the volume of the passage C, and a sufficient heat exchange area is ensured by the plurality of outlet pipes 12 and the baffles 17 to induce sufficient heat exchange. . It can be seen that the design of the baffle 17 and the outlet pipe 12 makes the efficiency of the primary heat exchange particularly high.

And the dehumidifier according to the present invention is designed to be compact.

The primary heat exchange and the secondary heat exchange are performed in the passages A and B, which are circumferentially overlapped in one outer casing, and make it possible to substantially reduce the volume of the dehumidifier according to the present invention. have. It is possible to design a small dehumidifier and achieve high dehumidification efficiency at the same time.

Claims (2)

A primary heat exchange portion in which air introduced by a plurality of outlet pipes arranged on the circumference is primary heat exchanged between the outer casing and the inner cells installed therein; The primary heat exchanged air is composed of a secondary heat exchanger configured to undergo a secondary heat exchanger while passing through an evaporator installed inside the inner cell; The second heat exchanged air is a heat exchanger of the compressed air dehumidifier, characterized in that discharged to the outlet through the outlet pipe of the primary heat exchange. The heat exchanger of the compressed air dehumidifier according to claim 1, wherein the air to be introduced has a zigzag shape in a zigzag shape in a circumferentially arranged pulley pipe in order to increase the heat exchange area with the outlet pipe of the primary heat exchange part. Device.