JPH0429249Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a heat exchanger used in air conditioners and the like.

Conventional technology Conventionally, the heat exchanger used in air conditioners was
The configuration is as shown in FIGS. A main body 1 of the air conditioner is provided with an inlet 3 above a front panel 2 and an outlet 4 below. Inside the main body 1, a plate-type heat exchanger 5 is installed facing the suction port 3 and tilted backward, a dew catcher 6 is provided below the heat exchanger 5 for receiving condensed water, and an indoor ventilation system is installed facing the air outlet 4. It is equipped with a blower 7 for use.

The heat exchanger 5 includes a pipe 8 through which a medium such as cold and hot water passes.
and plate fins 9 made of aluminum plates are laminated orthogonally, and the plate fins 9 have holes 10 into which the tubes 8 are fitted, which generate air turbulence between the holes 10. In order to increase the contact area between the passing air and the plate fins 9, a louver 11 formed by a notch is provided.

In this way, conventionally, the heat exchanger 5 consisting of the plate fins 9 fitted into the tubes 8 and provided with the louvers 11 and laminated is installed in the main body 1 at an angle of inclination of about 40° with respect to the vertical. Air flowing in from the opening 3 passes through the heat exchanger 5, enters the ventilation passage 12, and is blown out from the air outlet 4 into the room via the blower 7.

Problems to be Solved by the Invention In such a conventional configuration, dew condenses on the plate fins 9 of the heat exchanger 5 during cooling, and the condensed water flows diagonally downward through the plate fins 9 and drips into the dew pan 6. However, in the case of the method in which the water passes through the heat exchanger 5 from the upper suction port 3 and is blown out from the lower air outlet 4, the humidity is high and the amount of dew condensation is large, and the control of the blower 7 is difficult. In the case of strong dew, a part of the condensed water that flows through the plate fins 9 and the dew pan 6 is drawn by the ventilation force caused by the strong operation of the blower and drips into the ventilation passage 12, and the water is transmitted to the lead wire of the blower 7. There were problems such as poor insulation of the lead wire connection end and motor coil.

This invention solves these problems,
It prevents condensed water from dripping from the lower end of the heat exchanger, which is installed at an angle.
The purpose is to prevent poor insulation of motor coils.

Means for Solving the Problem In order to solve this problem, the present invention includes a main body equipped with an inlet and an outlet, and a heat exchanger inside the main body that faces the inlet and slopes backward. , the heat exchanger is composed of a tube and a fin fitted with the tube, and the fin at the lower end of the heat exchanger is inclined inward from the lower end, and the cutting direction is downward from the lower end. The upper end of the fin of the heat exchanger is provided with a cut-and-raised piece whose cutting direction is directed downward from the upper end. It has a structure in which the left and right sides are bent alternately.

Effect With this configuration, the condensed water that has condensed on the fins can be
The fins at the lower end are inside from the lower end, and the cut direction is downward to guide the flow inward by the cut and raised pieces, which are bent alternately on the left and right, so condensed water flows inward. Furthermore, at the upper end of the fin, the cutting pieces cut downward from the upper end are alternately bent to create air turbulence, guide dew condensation downward, and heat up. This will increase exchange efficiency.

Embodiment Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 3. A front panel 16 of a main body 15 of the air conditioner is provided with an inlet 17 and an outlet 18 below. The heat exchanger 19, which faces the suction port 17 and is inclined backward, has two copper tubes 20 arranged in a meandering manner through which a medium such as cold and hot water passes.
It is configured as a column pipe, and is composed of an aluminum fin 21 that is fitted orthogonally to the pipe 20. The fin 21 is provided with a louver 23 formed by a cut in order to create a turbulent flow of air between the plurality of holes 22 that fit into the tube 20 and increase the contact area of the air. A large number of the fins 21 are stacked on the tube 20. In the vicinity of the lower end 19a and the upper end 19b of the heat exchanger 19, there are cut and raised pieces 24a cut downward from the upper end 19b, and raised pieces 24a cut downward from the lower end 19a. It has cut and raised pieces 24, which are bent alternately to the left and right sides. Further, the cutting direction of the cut and raised pieces 24 is from the outside to the inside, and the cutting direction is inclined so that dew condensation water is guided inward with respect to the heat exchanger 19 provided at an angle. Cut at an angle. Then, as shown in FIG. 3, the cut and raised pieces 2 adjacent to each other
4 are arranged in a staggered shape. Below the heat exchanger 19, a dew pan 25 for receiving condensed water and a blower 26 for blowing air into the room are provided opposite the air outlet 18.

In the above configuration, when the medium is flowed through the pipe 20 and the blower 26 is operated during cooling, the suction port 17
More indoor air flows into the fins 21 of the heat exchanger 19.
The cold air passes through the air passage 27 and reaches the outlet 1.
Blows out into the room from 8. At this time, dew condensation occurs on the fins 21 of the heat exchanger 19, and normally this condensed water mostly travels along the central band of the fins 21 and drips onto the dew pan 25 below, but due to high humidity, the air blower 26
When the fins 21 are operated at high speed, the condensed water is transmitted vertically through the fins 21 due to the ventilation force. However, the fins 2 formed on the lower end portion 19a
The condensed water is stopped by one of the cut and raised pieces 24, and the condensed water is transmitted to the inside, and as it is guided inward by the cut and raised pieces 24, it is transmitted downward and drips into the dew catcher 25.

Note that the cut and raised pieces 24 are cut to a width of about 2 mm, and as shown in FIG. 3, they are bent and bent alternately to the right and left sides, and the cut and raised pieces 24 that are adjacent to each other are configured in a staggered shape. Ideally, the fins 24 do not necessarily have a zigzag shape, but are made of thin fins 21 and are laminated, so the cut and raised pieces 24 overlap to some extent. However, since the notch of the cut and raised piece 24 is inclined, condensed water with a size of a water droplet is guided toward the inside of the fin 21 and the ventilation passage 27
There will be no more dripping.

As a result, the cut and raised pieces 24, together with the louvers 23, increase the turbulence of air passage, and the heat exchange efficiency is further increased.

Effects of the device As described above, the device draws air from above the main body.
In an air conditioner that blows air from below, the fins at the lower end of the heat exchanger are slanted toward the rear of the suction port, and the fins at the lower end of the heat exchanger are slanted inward, and the cut and raised pieces are used to exchange heat. The fins at the upper end of the vessel are provided with cut pieces cut downward from the upper end, and each cut piece is bent alternately on the left and right, so that condensation water can be removed by cutting the fins at the lower end by alternating bending. The dew drips into the tray while being reliably guided inward by the raised pieces, preventing it from dripping into the ventilation path, and even during high-speed operation, no dripping occurs. Also, at the upper end, the cutting direction is made downward from the upper end,
In addition, by the alternately bent cut and raised pieces, condensed water is guided inward and drips accurately onto the dew pan, and air contact due to turbulence is increased, thereby increasing heat exchange efficiency. By reliably guiding the condensed water to the condensation tray, it prevents accidents such as water entering the connection ends of the blower lead wires and motor coils, and also eliminates insulation defects. be.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an air conditioner having a heat exchanger according to an embodiment of the present invention, Fig. 2 is a partially enlarged perspective view of the fins of the heat exchanger, and Fig. 3 is a lower end of the heat exchanger. FIG. 4 is a sectional view of an air conditioner having a conventional heat exchanger, and FIG. 5 is a partially enlarged perspective view of the fins of the heat exchanger. 19...Heat exchanger, 19a...Lower end, 20...
...tube, 21 ... fin, 24, 24a, ... cut piece.

Claims (1)

[Scope of utility model registration request] A main body with an inlet on the top and an outlet on the bottom,
a heat exchanger that faces the suction port and slopes backward, the heat exchanger being composed of a meandering pipe and a fin that fits on the outer periphery of the pipe; The fins at the lower end of the heat exchanger include a cut piece having an inclination angle inward from the lower end and cut in a direction downward from the lower end; The upper end of
A heat exchanger provided with cut and raised pieces cut downward from the upper end, and the cut and raised pieces at the upper and lower ends are bent alternately left and right.