凍結防止装置 - sanei corporation

Title:

凍結防止装置

Document Type and Number:

Japanese Patent JP7374677

Kind Code:

B2

Abstract:

To provide a freeze prevention device which can operate a temperature-sensing switching valve body at favorable responsiveness with respect to a temperature change of atmospheric air.SOLUTION: A freeze prevention device 5 for preventing a freeze of piping has: a main body part 10 having a flow-out port 12 connected to the piping in a flow passage and making retained water in the piping flow out, and a discharge port F1 for discharging the retained water flowing out of the flow-out port 12 to the outside; and a temperature-sensing switching valve body 20 arranged in the main body part 10, and switching an opening/closing state of the flow-out port 12 by elongation/contraction in a pipe axial direction accompanied by a temperature change of atmospheric air which is taken into the main body part 10, being the switching valve body 20 for maintaining the flow-out port 12 in a valve-closed state when the atmospheric air taken from the discharge port F1 is equal to or higher than a prescribed temperature, valve-opening the flow-out port 12 by the fact that the atmospheric air taken from the discharge port F1 becomes lower than the prescribed temperature, and valve-closing the flow-out port 12 once again by a water temperature which becomes equal to or higher than the prescribed temperature of the retained water which is discharged accompanied by the valve-opening; and a ventilation port F2 which forms an opening different from the discharge port F1 at the main body part 10.SELECTED DRAWING: Figure 6

Inventors:

Kensuke Kataoka
Yukari Matsuyama
Junji Yoshikawa

Application Number:

JP2019164384A

Publication Date:

November 07, 2023

Filing Date:

September 10, 2019

Export Citation:

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