JPS6231233U - - Google Patents

Description

[Brief explanation of drawings]

1 to 5 are diagrams showing an embodiment of the antifreeze device for a ventilation system according to this invention, in which FIG. 1 is a configuration diagram, FIG. 2 is a plan sectional view of the damper portion of FIG. 1,
Figure 3 is a side sectional view of Figure 2, Figure 4 is a melting time characteristic curve diagram, Figure 5 is a freezing time characteristic curve diagram, and Figure 6 is a diagram of freezing time characteristic curves.
Figure 7 is a block diagram showing another embodiment of this invention, Figures 7 to 10 are diagrams showing a conventional heat exchange type ventilation system, Figure 7 is a longitudinal sectional view, and Figure 8 is a diagram of a heat exchanger. FIG. 9 is an enlarged perspective view of the end face, FIG. 9 is a configuration diagram, and FIG. 10 is an explanatory diagram of freezing. In the figure, 1 is the main body of the ventilation system, 2a is a low-temperature air inlet, 2d is a high-temperature air outlet, 3 is a heat exchanger, 6 is a supply air blower, 7 is an exhaust blower, 9 is a box body, 9
A is a low temperature flow path, 9B is a high temperature flow path, 9a is a low temperature flow path inlet, 9b is an exit on the left, 9c is a high temperature air inlet, 9
d is the same left outlet, 12 and 13 are dampers, and 14 is a heating element. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Amendment September 12, 1986 The scope of claims for utility model registration is amended as follows.

[Scope of Claim for Utility Model Registration] (1) A ventilation system that supplies low-temperature air sucked in from a low-temperature air intake port through a heat exchanger, and discharges high-temperature air sucked in from the room from a high-temperature air outlet through the heat exchanger; A low-temperature flow path provided in a box placed indoors that supplies low-temperature air sucked in from the inlet to the low-temperature air suction port of the ventilation device from the outlet, and a high-temperature air blower of the ventilation device provided in the box. A high-temperature flow path introduces high-temperature air discharged from the outlet from the inlet and discharges it outdoors from the outlet, and is provided in the low-temperature flow path and the high-temperature flow path. A freezing prevention device for a ventilation system, comprising a damper that reduces a passage area, and a heater that is provided in the low temperature flow path and is energized when the damper is operated. (2) Utility model registration claim 1 which detects the temperature of low-temperature air, and when the temperature at which the heat exchanger freezes is detected, the damper is operated and the heater is energized at predetermined time intervals. Antifreeze device for ventilation equipment as described in Section 1.

Claims (1)

[Scope of utility model registration request] A ventilation device that supplies low-temperature air sucked in from a low-temperature air suction port through a heat exchanger, and discharges high-temperature air sucked from a room through the heat exchanger and from a high-temperature air outlet; A low-temperature flow path that supplies low-temperature air sucked in from the inlet to the low-temperature air suction port of the ventilation device from its outlet, and high-temperature air that is provided inside the box body and discharged from the high-temperature air outlet of the ventilation device is introduced from the inlet. and a damper provided in the low temperature flow path and the high temperature flow path to open each flow path at all times and reduce the area of each flow path when necessary, and the low temperature flow path. A freezing prevention device for a ventilation system, comprising a heating element that is installed in the damper and is energized when the damper is operated.