JPS5924791B2 - 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 and radiators of air conditioners, and in particular provides an optimal gas-liquid multiphase flow generator for utilizing the latent heat of vaporization of droplets. It is related to.

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, the method for spraying droplets on this type of evaporative heat exchanger was to spray water from above the heat exchanger using an electric pump or the like to pump water from a water tank located at the bottom of the heat exchanger. There was something.

However, with this method, the water droplets sprayed are too large, making it impossible to spray water uniformly over the entire surface of the heat exchanger, and the liquid film becomes too thick on the sprayed area, inhibiting evaporation. There were drawbacks such as.

Another method has been devised in which a part of the rotating disk is immersed in liquid and the droplets are splashed and hit the heat exchanger, but this method uses the centrifugal force of the rotating disk. Due to the nature of the device used, the droplets from the disk only fly in the tangential direction of the disk, making it impossible to spread the droplets uniformly over the entire surface of the heat exchanger.

Moreover, these means only disperse droplets,
Since it does not have an air blowing function, it is necessary to install an air blower in addition to the sprinkler device mentioned above in order to improve the heat transfer performance of the heat exchanger and generate airflow to promote the evaporation of droplets. Ta.

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 according to the present invention, which includes a propeller fan 3, a heat exchanger 4, and a rotary cup 1 having a substantially conical cross-sectional shape for atomizing liquid on the same drive shaft 2, a heat exchanger 4, and a liquid in the rotary cup 1. It consists of a liquid supply pipe 5 inserted through an opening 1a through which the liquid is scattered, a rotary cup 1, and a motor 6 that rotates a propeller fan 3.The motor 6, propeller fan 3, rotary cup 1, and heat exchanger are installed in a casing 7 from the windward side. They are installed in the order of 4.

Further, the diameter of the opening 1a of the rotary cup 1 is set so as to follow the boss 3a of the propeller fan 3.

The airflow deflection member 9 is provided between the bell mouth 8 of the propeller fan and the heat exchanger 4 so that its opening area decreases toward the heat exchanger 4.

The operation of the above configuration will now be explained.

When the drive shaft 2 is rotated by the motor 6 and the rotary cup 1 is rotated, the liquid flowing in the liquid supply pipe 5 flows into the rotary cup 1 near the minimum diameter portion 1b of the rotary cup 1.
The liquid flows along the inner wall of the rotary cup 1 toward the opening 1a, is atomized by centrifugal force at the opening 1a, becomes droplets, and tends to scatter in a direction perpendicular to the drive shaft 2.

However, the airflow generated by the propeller fan 3, which is coaxial with the rotating cup 1 and rotating at the same rotation speed, is directed by the airflow deflection member 9 in the direction of the white arrow, that is, in the direction of the rotating cup 1, so it is perpendicular to the drive shaft 2. The droplets that are about to scatter in the direction of
The fluid is transported to the heat exchanger 4 and exchanges heat with the fluid flowing inside the heat exchanger 4.

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

That is, the liquid supplied by the liquid supply pipe 5 is atomized by the rotary cup 1 and becomes all droplets, and the airflow generated by the propeller fan 3 has a vector in the direction of the rotary cup 1 by the airflow deflection member 9. The droplets are bent in a direction approximately horizontal to the drive shaft 2, and most of them are evenly transported to the entire heat transfer surface of the heat exchanger 4, so the heat transfer performance is significantly improved, and the amount of liquid supplied is Since the amount of liquid can be made almost equal to the amount of evaporated liquid in the exchanger 4, the amount of liquid used is significantly reduced, which is very economical.

In addition, by simply providing the airflow deflection member 9, the rotary cup 1 can be rotated on the same axis as the propeller fan 3 by the same motor 6, and the gas-liquid multiphase fluid can be transported to the heat exchanger without waste. The fan motor and the power source for the atomizer can be integrated, and the heat exchange device can be significantly simplified and made more compact.

Next, another embodiment is shown in FIG. 2, where the names of the numbers and their functions correspond to those of the numbers in FIG.

In this embodiment, the bell mouth 8 of the propeller fan 3 and the airflow deflection member 9 are integrated, and the opening area thereof is reduced toward the heat exchanger 4.

Therefore, the effect is similar to that of the embodiment shown in FIG.
Furthermore, since the bell mouth 8 and the airflow deflection member 9 are integrated, manufacturing and installation are greatly simplified, and costs can be significantly reduced.

As described above, the present invention provides a heat exchange device that transports a gas-liquid multiphase fluid to a heat exchanger using a propeller fan having a rotary cup coaxially for atomizing a liquid. Since an airflow deflection member is provided between the heat exchangers, most of the droplets atomized by the rotating cup are uniformly transported to the entire heat transfer surface of the heat exchanger, significantly improving heat transfer performance. Furthermore, since the amount of liquid supplied can be made almost equal to the amount of evaporated liquid in the heat exchanger, the amount of liquid used can be significantly reduced, making it extremely economical, and the fan motor and power source for the atomization device can be integrated. Therefore, the heat exchange device can be made much simpler and more compact, and if the bell mouth of the propeller fan and the airflow deflection member are integrated, manufacturing and installation can be made much easier, which has the excellent effect of significantly reducing costs. be.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a heat exchange device in an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing another embodiment. DESCRIPTION OF SYMBOLS 1... Rotating cup, 2... Drive shaft, 3... Propeller fan, 4... Heat exchanger, 5... Liquid supply pipe, 6
...Motor, 7...Casing, 8...Bellmouth, 9...Airflow deflection member.

Claims (1)

[Scope of Claims] 1. A heat exchange device that transports a gas-liquid multiphase fluid to a heat exchanger by a propeller fan having a rotating cup coaxially atomizing a liquid, wherein a bell mouth of the propeller fan and a bell mouth of the heat exchanger are provided. A heat exchange device characterized in that an airflow deflection member is provided in between. 2. The heat exchange device according to claim 1, wherein the bell mouth of the propeller fan and the airflow deflection member are integrated.