JPS6015850B2 - Water heater antifreeze device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing freezing of a feeder and injury machine, and in particular, uses a low-temperature operating valve to open when the temperature drops below a certain level due to a self-circuit, and to prevent the freezing of water in a water storage tank located at the bottom. When the water is drained, the pressure switch is turned on due to the drop in the pressure stored in the accumulator and the pump is rotated to circulate the water in the water storage tank through a low-temperature operating valve to prevent freezing.

Conventionally, measures to prevent freezing of pipes, such as pipe heaters, were wrapped with tape heaters or insulation materials to generate warmth and prevent freezing. Freeze prevention is inefficient.

Further, there are drawbacks such as troublesome work and high cost.
Therefore, the present invention addresses such drawbacks.
In other words, when the temperature drops below a certain level, a low-temperature valve installed in the piping is opened, and the water stored in the water tank is circulated through the low-temperature valve using a pump to prevent freezing.
Furthermore, it eliminates the tediousness of conventional work and saves costs. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the water heater antifreeze device according to the present invention will be described in detail below with reference to the accompanying drawings.

Reference numeral 1 denotes a water heater main body, which houses a heat exchanger 2 in the upper part and a combustion device 3 such as a burner in the lower part, and also has a water storage tank 4 in the lower part. A pump 6 driven by a motor 5 is installed on the top of the pump 6, and a water suction pipe 7 connected to the suction side of the pump 6 is inserted into the water of the water storage tank 4.

The discharge side of the pump 6 is connected to one end of the heat exchanger 2 by a water supply pipe 8, and an accumulator 9, a pressure switch 11, and a water flow switch 10 are interposed between these pipes. A hot water supply pipe 13 is connected to a hot water supply port 12 provided in the main body 1.
The pipes are connected by connecting the pipes. A branch pipe 14 is provided in the middle of the hot water supply pipe 13, and a low temperature operation valve 15 is attached to the tip of this branch pipe 14. The low temperature operation valve 15 is located at the upper part of the water storage tank 4 so that water can be drained into the water storage tank 4. Further, the water storage tank 4 has a ball tap 16.
The valve mechanism is designed to stop when a certain amount of water is supplied. As is clear from the above-mentioned configuration, in the present invention, the starting switch is turned on, the motor 5 rotates the pump 6, the water contained in the water storage tank 4 is sucked up through the water suction pipe 7, and the pressure is stored in the accumulator 9 on the discharge side. Water is supplied to the heat exchanger 2 through the water supply pipe 8, and this heat exchanger 2 is connected to the combustion device 3 from the bottom.
Heat exchange is performed by combustion of
and is sent out from the hot water supply port l2.

Further, when hot water from the hot water supply port 12 is stopped after use and the combustion device 3 is drained, hot water remains in the water supply pipe 8 and the water supply pipe 13.

At this time, freezing will occur in cold regions, but if the outside air drops before freezing occurs, the low temperature operation valve 15 attached to the branch pipe 14 branched from the hot water supply pipe 13 will act as a barrier.
The residual water remaining in the pipe is automatically drained into the water storage tank 4 through the low temperature operating valve 15. Due to this drainage, the accumulated pressure in the accumulator 9 in the pipe decreases, and when the pressure in the pipe decreases further, the pressure switch 11 is automatically turned on, forming an electric circuit for the motor, and the motor rotates the pump, and the pump is activated via the low-temperature operation valve 15. This system forms a circulation circuit, and the rotation of the pump circulates the water in the water storage tank. As described above, in the present invention, the heat exchanger 2 is disposed inside the main body 1 of the feeder, and the combustion device 3 is disposed below the heat exchanger 2, and one end of the heat exchanger 2 is connected to the water storage tank 4 and the water suction pipe 7.
A water supply pipe 8 connected to the discharge port of the pump 6 connected via
, Ikebata connects the hot water supply pipes 13 connected to the hot water supply port 12 respectively, and installs an accumulator 9 and a pressure switch 10 interposed in the electric circuit of the pump between the water supply pipes 81 and 13 to the other hot water supply pipe 13. is provided with a branch pipe 14, and at the tip of this branch pipe 14 is a low-temperature operating valve 1 located at the top of the water storage tank.
5 is installed, and this low-temperature operating valve 15 is positioned so that water can be drained into the water storage tank 4.The low-temperature operating valve 15 automatically closes when the temperature becomes low, and when this valve opens, the water storage tank 4 and the heat exchanger 2 circulation circuits are constructed, and continuous circulation is performed by the operation of the pump 6.

It constantly moves water to prevent freezing, and since it can prevent freezing using its own circuit, it does not require the trouble of conventional methods, is inexpensive, and has the feature of reliable freezing prevention.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of the water heater antifreeze device according to the present invention. 1 - water heater body, 2 - heat exchanger, 3 - combustion device, 4 - water storage tank, 5 - motor, 6 - pump, 7 - water suction pipe, 8 -
Discharge pipe, 9 - accumulator, 10 - water switch,
11~Pressure switch, 12~Hot water supply port, 13~Hot water supply pipe, 1
4 - Branch pipe, 15 - Low temperature operation valve, 16 - Ball tap.

Claims (1)

[Claims] 1. A heat exchanger is installed inside the water heater body, and a combustion device is installed below it, and one end of the heat exchanger is connected to a water supply pipe connected to the discharge port of a pump that communicates with a water storage tank via a water suction pipe. The other end is connected to a hot water supply pipe connected to a hot water supply port, and a pressure switch is provided between the water supply pipes to be interposed in the electric circuit of the accumulator and the pump, and a branch pipe is provided on the other water supply pipe. , This branch pipe is equipped with a water heater anti-freeze device that is equipped with a low-temperature operating valve that allows water to drain into the water storage tank.