JPS60572Y2 - heat exchange ventilation fan - Google Patents

Description

[Detailed description of the invention] This invention relates to a ceiling-embedded heat exchange type ventilation fan, and its purpose is to easily confirm the cleaning period of the heat exchange element, encourage maintenance and inspection, and provide effective The purpose is to provide ventilation.

Conventionally, heat exchange type ventilation fans have a motor 1 as shown in Figure 1.
The blades 2, 2' are rotated by the arrows A-, A' and 13. to draw air from indoors and outdoors. Let the air flow like B',
Heat exchange was performed using the heat exchange element 3.

However, the heat exchange element 3 and the filter 4.degree. 4' are easily contaminated due to indoor air and outdoor air passing through them, and are often operated while clogged.

In particular, with ceiling-embedded equipment, since the equipment is located on the ceiling, it is difficult to check the dirtiness of the heat exchange element and filter, and the equipment's capabilities are not being fully utilized.

The present invention solves these disadvantages, and embodiments of the present invention will be described below with reference to FIGS. 2 and 3.

In the figure, 5 indicates exhaust passages C, C' and air supply passage, D'
6 is a heat exchange element provided at the intersection of the exhaust passage and the air supply passage, 7 is a filter on the exhaust passage side that is in contact with the heat exchange element, and 7' is the air supply that is in contact with the heat exchange element. a filter on the air passage side; 8 is an exhaust vane for blowing air into the exhaust passage; 8' is an air supply vane for blowing air into the air supply passage; 9 is a motor for rotating the exhaust and air supply vanes; 10 is a shutter that rotates around the shutter pin 11 due to the wind pressure of the air supply blade, and moves toward and away from the limit switch 12 provided at the indoor discharge port. When the motor is stopped, the shutter is positioned just in front of the blade, as shown in E, due to its own weight. ing.

Further, as the limit switch 12, a microswitch is generally used.

13 is a lamp lit by a limit switch.

In the above configuration, when the switch 14 is turned on, the lamp 13 lights up and at the same time the motor 9 rotates the waist blades 8,
8' is rotated, and the indoor air sucked in from the indoor suction port 15 by the vane 8 passes through the exhaust passage C→C' to the exhaust duct 1.
The air is discharged to the outside through the air supply duct 17 through the vane 8'.
The outside air that has been drawn in passes through the air supply passage [) and D', and is discharged indoors from the indoor discharge port 18.

During this time, mutual heat exchange takes place within the heat exchange element 6.
At this time, the shutter 10 provided at the indoor discharge port 18 turns off the limit switch 12 due to the wind pressure of the air supply blade 8', so the lamp 13 goes out.

However, if you are driving for a certain period of time, the filter 7.7'
gets dirty because air passes through it.

In particular, 7' becomes extremely dirty due to the passage of outside air, the wind pressure on the air supply blade decreases, and the shutter 10 moves away from the limit switch 12 due to its own weight, so the lamp 13 lights up and the filter and heat exchange element become dirty. You can let them know what's going on.

Note that in the above embodiment, the lamp 13 may be a buzzer, as long as it appeals to human's five senses.

As described above, according to the present invention, it is possible to check when it is time to clean the filter and heat exchange element without touching the equipment itself, and by prompting maintenance inspections such as cleaning, it is possible to prevent operation while the filter and heat exchange element are clogged. , which brings about the effect of fully demonstrating the capabilities of the equipment and enabling effective ventilation.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional example, FIG. 2 is a sectional view of a ventilation fan according to an embodiment of the present invention, and FIG. 3 is a wiring diagram of the same ventilation fan. 1...Motor, 2, 2'...Blade, 3
...Heat exchange element, 4,4'...Filter, 5...Main body, 6...Heat exchange element,
7, 7'... Filter, 8... Exhaust vane, 8'... Air supply vane, 9... Motor, 10... ...Shutter, 11...Shutter pin, 12...Limit switch, 1
3...Lamp, 14...Switch, 1
5... Indoor suction port, 16... Exhaust duct, 17... Air supply duct, 18... Indoor discharge port.

Claims (1)

[Scope of utility model registration request] A main body that partitions an exhaust passage and an air supply passage, a heat exchange element provided at the intersection of the exhaust passage and the air supply passage, and a heat exchange element located inside the exhaust passage and the air supply passage for blowing air to each passage. It has an exhaust vane, an air supply vane, and a motor that rotates them, and a limit switch and a rotatable shutter are provided at the indoor discharge port of the air supply passage, and the reshaft is limited by the wind pressure of the air supply vane. A heat exchange type ventilation fan that senses changes in air supply volume by placing it in contact with and away from a switch.