Fluid discharge structure for fluid control device

Abstract

A fluid discharge structure for a fluid control device enables air bleeding to be performed simply and reliably by providing a simply-structured air bleeding part for bleeding air from a coolant passage. An air bleeding part for discharging fluid provided to an upper part of a housing of the device is composed of a cock retention hole that opens at an upper end of the housing, an air bleeding cock that is slidably retained in the cock retention hole and in which a cock outer end is subjected to pressing operation, an air bleeding hole that causes a part of the cock retention hole to be opened in a longitudinal direction to an outside of the housing, and a spring part for constantly causing the air bleeding cock to be biased upward for protruding the cock outer end upward. The air bleeding cock and the cock retention hole together configure an air bleeding circuit which normally blocks communication between a coolant passage and an air bleeding hole by causing the air bleeding cock to protrude upward, and allows communication between the coolant passage and the air bleeding hole when the cock outer end is pressed.

Description

technical field [0001] The present invention relates to a fluid discharge structure of a fluid control device preferably used for exhaust, water discharge, oil discharge, etc. For example, the fluid temperature of a cooling water circuit or the like that cools cooling water of an internal combustion engine (hereinafter referred to as an engine) used in an automobile or the like opens and closes or switches a flow path. Background technique [0002] For example, in a motor vehicle engine, a water-cooled cooling system using a radiator is generally used to cool the engine. Furthermore, in such a cooling system, the temperature of the cooling water introduced into the engine can be controlled by using a thermostat using a thermal expander that adjusts the amount of cooling water circulating on the radiator side. [0003] At present, the following structure is known, that is, in such a cooling system, in order to eliminate the accumulation of gas in the piping when filling the ...

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Problems solved by technology

[0005] However, in the above-mentioned conventional structure, a threaded valve is used as a valve for exhausting. Therefore, tools and the like are required for exhausting, and the exhausting operation is troublesome and complicated. In addition, the valve may be damaged due to vibration of the engine or the like. Loose, so that the cooling water is discharged to the outside, or the air enters the cooling water passage, etc.

[0006] In addition, in the threaded structure valve, it is necessary to provide a threaded part on the housing by cutting, etc., and the manufacturing cost is high. In addition, there may be problems such as the sealing O-ring being caught in the thread groove or crossing the passage, etc., and being cut off.

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