JPH0744909Y2 - Water heater with built-in water hammer prevention device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a water pressure direct pressure type water heater having a small can body capacity.

[Conventional technology]

Since direct water pressure type hot water heaters have a small can body capacity, there is a large variation in the temperature of the hot water supplied from the hot water outlet, and in order to absorb this, there are some that are equipped with a mixing tank with a capacity of 1-2 l in the middle of the pipe. It was Also, when the hot water tap is of the lever type, an expansion tank is installed in the piping path between the water heater and hot water tap to prevent the internal pressure fluctuation from causing a water hammer effect when it opens and closes instantaneously. Sometimes, construction work was added to absorb the internal pressure.

[Problems to be solved by the device]

The mixing tank and expansion tank described above are not standard equipment in the water heater itself as standard products, and depending on the contractor, they will not be ancillary work. It was often done. In particular, the water hammer action did or did not occur depending on the supply water pressure, piping method, etc., so an expansion tank was not always necessary, but with the recent spread of the lever-type hot water tap, It turns out that it is better to take measures to prevent fire.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a water hammer prevention device which is partitioned by a diaphragm into a closed chamber on one side and a mixing chamber connected to the hot water supply path on the other side. The present invention relates to a water heater with a built-in water hammer prevention device, which is provided between a machine can body and a hot water supply outlet and is integrated in a frame body.

[Action]

When the hot water tap is opened, the hot water heated by the water heater is supplied, but in the case of direct water pressure type, the internal volume of the can of the water heater is small, so the temperature of the hot water varies due to the pulsation of the combustion burner. Stir the fluctuation of the water in the mixing chamber before reaching the hot water tap. Also, if there is a factor that causes pressure fluctuations in the hot water supply pipe, the mixing chamber is adjacent to the closed chamber via the diaphragm, so the pressure fluctuations are detected by the diaphragm and displaced, thereby absorbing the pressure and hot water during hot water supply. It works to prevent temperature fluctuations and water hammer.

〔Example〕

The structure will be described below with reference to the drawings showing an embodiment. A is a water hammer prevention device body, the inside of which is partitioned by a diaphragm 1 to form a mixing chamber 4 which connects one with a sealed chamber 2 and the other with a hot water supply passage 3. The water hammer protection device A is connected between the water heater can body 5 and the hot water outlet 6, and 7 is a frame of the air supply device, which is integrally formed with the can body 5, the hot water supply path 3, and the water hammer prevention device A. Built-in. Reference numeral 8 is a combustion burner, 9 is a hot water tap, 10 is a water supply circuit, and 11 is a valve for adjusting the influence of water pressure or the like applied to the closed chamber 2.

The water supply circuit 10 is opened to supply water to the water heater can body 5, the combustion burner 8 is operated to generate hot water, and the hot water tap 9 is opened to supply hot water. The hot water discharged from the water heater can body 5 Passes through a mixing chamber 4 provided in the middle of the hot water supply path 3 and reaches the hot water tap 9 with the hot water temperature being made uniform in the mixing chamber 4. Further, when the hot water supply tap 9 is of the lever type, the hot water is opened and closed at once, which causes a pressure change in the hot water supply path 3. In this case, the diaphragm 1 and the closed chamber 2 absorb the pressure to prevent the water hammer effect.

〔effect〕

The present invention has the above-described configuration and operation. In the water hammer prevention device A, the closed chamber 2 and the mixing chamber 4 are separated by the diaphragm 1 and coexist, and the mixing chamber 4 is connected to the hot water supply path 3. Therefore, the temperature of the hot water in the mixing chamber 4 at the time of hot water supply is stabilized, and the pressure change when the hot water tap 9 is opened and closed is absorbed by the diaphragm 1 and the closed chamber 2 to prevent damage due to a water hammer effect. It has both functions.

Since the water hammer prevention device A is provided between the water heater can body 5 and the hot water supply outlet 6 and is integrated in the frame body 7, there is no need to install a special mixing chamber or expansion tank in the middle of the pipe, and There is no need to repair the water heater after installing it,
It has a great practical and economic effect. Further, the present invention is most suitable for a water heater having a small can capacity such as a direct water pressure type, or a water heater having a structure having a slight unevenness during combustion such as an oil burning burner.

[Brief description of drawings]

FIG. 1 is a schematic system diagram of the product of the present invention, and FIG. 2 is an enlarged cross-sectional view of the main part. 1 ... diaphragm, 2 ... closed chamber, 3 ... hot water supply route,
4 ... Mixing room, 5 ... Hot water heater can body, 6 ... Hot water supply outlet, 7 ... Frame body, A ... Water hammer prevention device

Claims (1)

[Scope of utility model registration request] 1. A diaphragm 1, one of which is a closed chamber 2,
On the other hand, a water hammer prevention device A, which is partitioned into a mixing chamber 4 connected to the hot water supply path 3, is provided between the water direct pressure type water heater can body 5 and the hot water supply outlet 6, and the water integrated in the frame body 7 is provided. Hot water heater with built-in hammer protection device.