JPS599168Y2 - Hydraulic response device in gas instantaneous water heater - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to preventing malfunctions due to freezing of a hydraulic response device in a gas instantaneous water heater.

In the hydraulic response device installed in a conventional gas water heater,
If it freezes in the coldest months, the rod will pop out due to expansion during freezing, opening the gas valve at its tip or closing the switch in the gas solenoid valve circuit, opening the gas passage, which is extremely dangerous.

The present invention aims to eliminate such conventional drawbacks, and will be specifically explained below with reference to figures.

Reference numeral 1 denotes a high-pressure side main body of the hydraulic response device, and the main body 1 has a concave high-pressure chamber 2 in the center of the upper part, a flange part 3 around it, and a protruding valve chamber 4 and a water outlet passage 5 in the lower part. There is.

6 is a high pressure side lid having a water inlet 7 and a water outlet 8.

Reference numeral 9 denotes a low-pressure side main body, which has a concave low-pressure chamber 10 in the center of the lower part thereof communicating with a low-pressure generator (Venturi) provided in the water outlet passage, a flange part 11 around the flange part 11, and a protruding part at the upper part. A low pressure side rod 12 is inserted through the hole in the center.

Reference numeral 13 denotes a fin provided on the upper surface of the low-pressure side main body 9.

In addition to the provision of fins, the low-pressure side main body 9 may be made of a material with better thermal conductivity than the high-pressure side main body 1, or both may be used in combination.

14 is a gas valve main body fitted and attached to the low pressure side main body 9, 15 is a gas valve body, 16 is a gas valve stem, 1
7 is a valve stem guide.

Reference numeral 18 denotes a diaphragm, the low pressure side of which is sandwiched between a pressure receiver 19 and the high pressure side of the auxiliary pressure receiver 20. A valve rod 21 is passed through the center of the diaphragm, and a nut 22 is screwed onto the diaphragm.
1, it is attached by pressing from both sides.

23 is a water control valve attached to the valve stem 21.

The present invention has such a structure, and when freezing occurs in the high pressure chamber 2 or valve chamber 4 on the high pressure side, the diaphragm 18 is pushed upward due to the volume expansion due to the freezing, and the valve connected to the diaphragm 18 is pushed upward. The rod 21, the low pressure side rod 12, and the gas valve rod 16 are also pushed up to push the gas valve body 15 open.

However, when freezing occurs in the low pressure chamber 10, the diaphragm 18 is pushed downward, contrary to the above, and the gas valve body 15 does not open.

Therefore, in the present invention, the low-pressure side main body 9 is made of a material with better thermal conductivity than the high-pressure side main body 1, or the fins 13 are made to protrude from the low-pressure side main body 9, thereby increasing the heat transmission coefficient on the low-pressure side. Freezing is ensured to occur from the low pressure chamber 10, thereby preventing the gas passage from being opened due to the freezing.

In this way, the present invention improves the thermal conductivity of the low-pressure side body by using a material with better thermal conductivity for the low-pressure side body than that of the high-pressure side body, or by having fins protrude from the low-pressure side body. Since the pressure is increased so that freezing always occurs from the low-pressure chamber side, there is no possibility of malfunctions such as opening of the gas valve body or actuation of a switch due to freezing, which has the effect of increasing safety.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of the present invention.

Claims (1)

[Scope of utility model registration request] The low-pressure side main body is characterized by an increased heat transmission coefficient by using a material with better thermal conductivity than the high-pressure side main body, or by having fins protrude from the surface of the low-pressure side main body. Hydraulic response device in gas instantaneous water heater.