JPS6214250U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an embodiment of the ventilation system with a heat exchange element according to this invention, Fig. 2 is a front view of the control switch, Fig. 3 is an electric circuit diagram, and Fig. 4 is a conventional heat exchange element. FIG. 5 is an enlarged perspective view of the end face of the heat exchange element shown in FIG. 4. In the figure, 2a is the outside air inlet, 2b is the same left outlet,
2c is the indoor air inlet, 2d is the same left outlet, 3 is the heat exchange element, 8 is the supply air blower, 9 is the exhaust blower, 12 is the closing device, 13 is the defrosting operation circuit (the electric motor for driving the closing plate) , 22c is a defrost operation circuit (switch switch), 23 is a defrost operation circuit (switch relay)
It is. Note that the same reference numerals in the figures indicate the same parts.

Claims (1)

[Scope of utility model registration request] A supply air blower sucks in outside air from the suction port and supplies the air indoors through the heat exchange element, and an exhaust blower sucks the indoor air and exhausts it outdoors through the heat exchange element, in the vicinity of the outside air suction port. a closing device that normally opens the outside air passage and closes the passage when operated; and a defrosting operation circuit that stops the supply air blower and operates the closing device while the exhaust blower is operated. A ventilation system with a heat exchange element, characterized by comprising: