JPS5925145B2 - heat exchange equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to improve the performance of heat exchangers such as condensers or radiators used in air conditioners, etc., and particularly aims to improve the performance of heat exchangers such as condensers or radiators used in air conditioners. The present invention relates to a fluid transport device.

One way to improve the heat transfer performance of a heat exchanger is to use the latent heat of vaporization of the droplets by scattering micro droplets on the heat transfer surface along with the airflow. There is.

Conventionally, in a heat exchange device that utilizes the latent heat of vaporization of water, water is drawn from a water tank located at the bottom of the heat exchanger using an electric pump, etc., and is sprinkled from above the heat exchanger. The latent heat generated when a portion of (usually about 10 I) evaporates is utilized.

This was uneconomical because the amount of evaporated water was very small compared to the amount of water sprinkled.

The reasons for this are that it is difficult to spray water uniformly over the entire surface of the heat exchanger because water is sprayed from above the heat exchanger, and because the amount of water sprayed is too large, the water film on the surface of the heat exchanger becomes too thick.
One example is that evaporation is suppressed.

Another idea has been to stack a large number of disks on top of each other, immerse some of them in water, and rotate them so that the water droplets splash and hit the heat exchanger, but this is very difficult to do because of the rotation of the disks. Due to the nature of the device that uses the centrifugal force of the plate, droplets from the disk fly only in the tangential direction of the disk, making it difficult to spray water uniformly over the entire surface of the heat exchanger. This method has disadvantages such as requiring a long distance between the watering device and the watering device.

The present invention solves the above-mentioned conventional drawbacks, and one embodiment thereof will be described in detail below with reference to the drawings.

FIG. 1 shows a heat exchange device of the present invention, which includes a propeller fan 3, a heat exchanger 4, and a rotary cup 1, each having a rotary cup 1 having a substantially conical cross-sectional shape for atomizing liquid on the same drive shaft 2. It consists of a liquid supply pipe 5 that is inserted through an opening 1a through which liquid is scattered, a rotary cup 1, and a motor 6 that rotates a propeller fan 3.
A propeller fan 3, a rotating cup 1, and a heat exchanger 4 are installed in this order.

The diameter of the opening 1a of the rotary cup 1 is still smaller than the diameter of the boss 3a of the propeller fan 3 (ttd).

The liquid supply pipe 5 has an opening 1a of the rotary cup 1.
A lattice member 8 surrounding the lattice member 8 is provided.

Furthermore, the heat exchanger 4 is installed in the casing 7 so that the lower part of the heat exchanger is closer to the propeller fan 3 than the upper part with respect to the direction of gravity.

As shown in FIG. 2, the grid member 8 is constructed by inserting thin wires 8c between annular side plates 8a and 8b at approximately equal intervals in the horizontal direction.

The operation of the above configuration will now be explained.

When the drive shaft 2 is rotated by the motor 6, an airflow is generated by the propeller fan 3 in the direction of the white arrow.

In addition, the liquid flowing in the liquid supply pipe 5 is supplied to a rotary cup 1 which rotates on the same axis and at the same rotation speed as the propeller fan 3.
The liquid flows into the rotary cup 1 near the minimum diameter portion 1b, flows along the inner wall of the rotary cup 1 toward the opening 1a, is atomized by centrifugal force at the opening 1a, and becomes droplets on the drive shaft 2.
attempts to scatter in a direction perpendicular to .

However, the droplets collide with the grid member 8, become even finer droplets, the scattering speed becomes smaller, and the propeller fan 3 causes them to flow in the direction of the white arrow, that is, in the direction horizontal to the drive shaft 2. According to the airflow, the direction of the dashed arrow is
That is, it is bent in a direction substantially horizontal to the drive shaft 2, and is transported along with the airflow to the heat exchanger 4, where it exchanges heat with the fluid flowing inside the heat exchanger 4.

Since it has the above-mentioned configuration and operation, it has the following effects.

The drive shaft 2 is rotated by centrifugal force from the opening 1a of the rotating cup 1.
Since the droplets scattered in the direction perpendicular to I~ collide with the grid member 8 and become finer, and the scattering speed is reduced,
The propeller fan 3 facilitates suspension in the airflow generated in a direction horizontal to the drive shaft 2, and most of the air is uniformly transported over the entire surface of the heat exchanger 4 along with the airflow without hitting the casing 7.

[- Because the droplets are finely divided, evaporation on the heat transfer surface of the heat exchanger can be carried out sufficiently actively, so the amount of liquid supplied is almost equal to the amount of evaporated liquid in the heat exchanger 4, which greatly reduces the amount of liquid used. It is possible to significantly improve heat transfer performance.

Note that if the heat exchanger 4 is installed at an angle with respect to the direction of gravity, 1. The reason for this is that the lower part of the heat exchanger 4 is placed closer to the propeller fan 3 side, considering that the droplets transported to the lower part of the heat exchanger 4 are affected by the gravitational acceleration and are difficult to scatter in a horizontal direction. This is to ensure that the lower heat transfer surface of the heat exchanger 4 is wetted with droplets in the same manner as the upper portion by placing the heat exchanger 4 close to the heat exchanger 4.

The grid member 8 may be made of thin horizontal lines shown in FIG. 2, or may be made of a thin plate, a wire mesh, etc., as long as the droplets can collide with it and that the droplets can be scattered outside from the grid member after the collision. is clear.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a heat exchange device according to an embodiment of the present invention, and FIG. 2 is a side view of the main parts thereof. 1... Rotating cup, 2... Drive shaft,
3... propeller fan, 4... heat exchanger, 5... liquid supply pipe, 6... motor, 7... casing, 8... Lattice member.

Claims (1)

[Claims] 1. A heat exchange device that transports a gas-liquid mixed fluid to a heat exchanger using a propeller fan having a rotating cup that atomizes liquid on the same axis, including a lattice member that surrounds an opening of the rotating cup through which the liquid is scattered. A heat exchange device featuring: