JPS5842690Y2 - gas water heater - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in gas water heaters.

Gas water heaters are widely used because they can instantly provide the required amount of hot water.

The general structure of this type of gas water heater includes a gas passageway equipped with an ignition burner and a main burner, and a water groove passageway that communicates with a hot water outlet pipe via a heat absorbing section provided opposite the main burner. However, a water governor is provided in the middle of the water groove passage.

The water governor chambers are partitioned by a diaphragm, and the diaphragm deforms in response to the pressure of water introduced into one of the chambers.

An automatic valve is provided in the middle of the gas passage, and the automatic valve opens and closes the gas passage according to the deformation of the diaphragm, thereby adjusting the amount of gas supplied to the main burner.

By the way, water drawn from the source contains a small percentage of limescale and dirt.

These may adhere to the diaphragm and prevent deformation.

Conventionally, therefore, the water pipe on the inlet side of the water governor chamber is closed with a filter to filter out the impurities.

However, filtered impurities adhere to the filter as it is, and because this area is small, clogging is likely to occur.

Naturally, impurities must be removed, but the filter cannot be easily removed and some parts must be disassembled, which is very time-consuming.

The present invention was developed based on the above circumstances, and its purpose is to provide a gas water heater that can prevent impurities from adhering to the diaphragm and reliably prevent clogging of the filter. This is what we are trying to provide.

In other words, the water conduction side of the diaphragm is covered with a flexible filter that traps impurities contained in water and prevents them from adhering to the diaphragm, and deforms as the water supply pressure fluctuates, allowing the trapped impurities to flow out. At least it eliminates clogging.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a gas instantaneous water heater, in which a gas cock knob 2 and a hot water temperature adjustment knob 3 are juxtaposed and protrude from the front side of a housing 1.

Above the gas cock knob 2, there is a viewing window 4 for checking the pilot flame.
is drilled.

A gas connection port body 5, a hot water outlet pipe 6, a water supply port body (not shown), etc. are provided on the lower surface side of the casing 1, and vent holes 7 are provided on both side surfaces and the top surface.

The gas cock knob 2 opens and closes a gas passage that communicates the gas connection port body 5 with a main burner (not shown).

The hot water temperature adjustment knob 3 opens and closes a water groove passage 8, which is partially shown only in FIG.

Next, the hot water temperature adjustment knob 3 and the water groove passage 8 will be explained as shown in FIG.

The hot water temperature adjustment knob 3 is fitted onto an adjustment shaft 9, and the distal end thereof is provided with a guide hole 10a drilled in the axial direction and an adjustment hole 10b perpendicular to the guide hole 10a. A section 11 is provided.

The adjustment hole 10b can face an outlet hole 13 provided in the water governor body 12, and the guide hole 10a communicates with a discharge chamber 14 also provided in the water governor body 12.

The water governor main body 12 is attached to this end, but the water governor body 12 is attached to this end.
5 constitutes a water governor section 16.

As described above, the water governor main body 12 includes the outlet hole 13 and the discharge chamber 14 communicating with the hot water outlet pipe 6 via the water pipe 6a, and has a valve plate 17 facing the water supply port body via the water pipe 6b.

A water governor chamber 18 is formed between the valve plate 17, the water governor main body 12, and the governor cover 15.

The water governor chamber 18 is partitioned by a diaphragm 20 through which a guide boss 19 passes through the center.

A pressure receiving plate 20a is provided on the governor cover 15 side,
In addition, a compression spring 2 is connected between the water governor main body 12 side and the valve plate 17.
1 intervenes.

Furthermore, the diaphragm 20 has first and second floats 22.
a and 22b are provided in a protruding manner, and these are first and second guide holes 23a provided in the valve plate 17.

23b, and the opening amount is adjusted according to the deformation of the diaphragm 20.

Furthermore, a filter 24 is provided on the water governor main body 12 side of the diaphragm 20 to completely cover the diaphragm 20.

The filter 24 is made of a very thin flexible net and is adapted to deform in accordance with the deformation of the diaphragm 20.

On the other hand, the guide boss 19 provided at the center of the diaphragm 20 has one end movably fitted into the fitting hole 14a provided in the discharge chamber 14, and the other end protrudes toward the governor cover 15 side. .

Bypass holes 25 are provided at both ends to communicate the discharge chamber 14 with one of the water governor chambers 18.

A boss 27 is attached to the governor cover 15 and has a spindle 26 that resiliently abuts the guide boss 19 .

The spindle 26 is provided in the middle of the gas passage and operates an automatic valve that cuts off the supply of gas to the main burner (not shown).

By adjusting the gas cock knob 2, an ignition burner (not shown) is ignited, and then by rotating the hot water temperature adjustment knob 3, the adjustment hole 10b is opened opposite the outlet hole 13 to the water governor chamber 18. The water that was led to the discharge chamber 14
will be guided to.

A portion of the water is guided to one chamber of the water governor chamber 18 through the bypass hole 25, and water is guided to the other chamber from the first introducing hole 23a of the valve plate 17.

A water pressure difference occurs between each chamber of the water governor chamber 18, and the diaphragm 20 deforms accordingly.

The guide boss 19 presses the spindle 26 depending on the amount of deformation of the diaphragm 20.

Therefore, the automatic valve opens the gas passage according to the water pressure,
Gas is led to the main burner, ignites from the ignition burner, and burns.

On the other hand, water led out from the discharge chamber 14 is converted into hot water when passing through a heat absorbing section (not shown) provided opposite to the main burner, and is then supplied from the hot water outlet pipe 6.

Note that the water led from the water supply port body to one of the chambers of the water governor chamber 18 passes through the filter 2 immediately before contacting the diaphragm 20.
Pass 4.

Therefore, all impurities such as scale and dirt contained in this water are removed by the filter 24, and the diaphragm 2
The movement of 0 is completely smooth.

Furthermore, since the filter 24 is flexible, it deforms as the diaphragm 20 deforms.

Each time this deformation occurs, the filter 24 passes through the filter 24, and the trapped impurities are separated from the filter 24 and discharged from the outlet pipe 6 along the flow of water.

Therefore, the filter 24 is not clogged at all, and there is no need to clean it even after long-term use.

As explained above, according to the present invention, a flexible filter is provided to cover the water conduction side of the diaphragm that partitions the water governor chamber, thereby reliably preventing impurities such as scale and dirt from adhering to the diaphragm. In addition to maintaining this sensitivity, the filter is automatically unclogged by the flow of water, eliminating the need for cleaning or replacement even after long-term use.
This has the effect of saving time and effort.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of a gas water heater, and FIG. 2 is a longitudinal cross-sectional view of the main parts. 20...Diaphragm, 18...Water governor chamber, 24...Filter.

Claims (1)

[Scope of utility model registration request] A water governor chamber partitioned by a diaphragm is provided, and the diaphragm is deformed as the water supply pressure fluctuates to adjust the gas supply amount, wherein the water conduction side of the diaphragm is covered with a flexible filter. A gas water heater characterized by: