JPH074447Y2 - Open type hot water storage tank with deaerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an open type hot water storage tank provided in a piping system path for hot water supply and / or heating such as a circulating hot water supply system and a central heating system. .

<Prior art> In a hot water supply system or a central heating system with hot water heating when consumption is relatively large,
In order to always secure hot water of a predetermined temperature, a hot water storage tank is provided in the circulation pipe system path of the hot water outgoing pipe and the hot water return pipe.

The hot water storage tank is heat-insulated as necessary on the inner or outer circumference of the tank, and is equipped with a heater such as an electric heater at the bottom of the tank, and the water level detector for the stored hot water, the overflow pipe, and the water level detector described above are used. It is equipped with controlled make-up water pipe, expansion pipe, drain pipe, etc.

<Problems to be Solved by the Invention> In such a hot water supply and / or heating piping system path (hereinafter referred to as “piping system path” in the present specification), corrosion in the piping system path is large during long-term use. It is likely to cause problems.

It is known that the cause of this corrosion is gas such as oxygen dissolved in the circulating hot water.

For this reason, as the hot water storage tank, an open type in which the upper part of the tank communicates with the outside air to facilitate deaeration is used more frequently than a so-called closed type. Deaeration of this open type hot water storage tank uses only the ascending force due to the buoyancy of the gas when the dissolved gas becomes bubbles due to heating.

However, since the above-mentioned gas is extremely minute in the form of bubbles, it takes a considerable time to rise in the stored warm water and separate and diffuse into the air in the upper part of the tank. Therefore, when the circulation is started to use the stored hot water, the bubbles are drawn into the pipe system path immediately before the separation and emission, and it is impossible to degas sufficiently.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems and is intended to solve the problems.

An object of the present invention is to provide a hot water storage tank which is provided with a simple deaerator attached to an open hot water storage tank to remove excess gas from stored hot water in a quick and effective manner and prevent it from flowing into a pipe system passage. Where it is.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention is an open type hot water storage tank provided in a hot water supply and / or heating piping system, in which hot water stored in the tank is pumped up. A degassing device consisting of a degassing pump for spraying from the upper space and storing again is attached to the hot water storage tank.

<Operation> When the degassing pump is driven, the stored hot water is sucked by the degassing pump and sent to the sprinkler pipe.

The warm water sent is sprayed as trickle water by a water spray pipe. Then, in the air from the sprinkling pipe until it is mixed again into the stored warm water, the minute bubbles contained in the sprayed trickle water are likely to come into contact with the air in the tank, so that it should be instantaneously released into the air. become.

As a result, the dissolved gas in the stored hot water is quickly removed, so that the inflow / circulation into the pipeline can be prevented, that is, the corrosion in the pipeline due to the dissolved gas can be effectively prevented.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

The figure is an explanatory view showing a configuration in which a deaerator is attached to an open type hot water storage tank.

In the figure, reference numeral 1 is a hot water storage tank, and the inner circumference or the outer circumference of the hot water storage tank is subjected to a necessary heat insulation treatment as required to provide a heat storage function. This hot water storage tank 1 does not fill the inside of the tank with hot water, but forms a space A communicating with the outside air in the upper part of the tank to store a required amount of hot water HW. Reference numeral 2 is a water pipe to be replenished when the stored hot water HW in the hot water storage tank 1 is reduced, and one end is connected to a water supply source (not shown), and a water faucet 3 is provided on the way.
The supply of makeup water to the hot-water storage tank 1 and the suspension of the supply are performed. Further, opening / closing of the faucet 3 is performed by storing hot water stored in the hot water storage tank 1.
It is controlled by the water level detection device 4 of the HW. The water level detection device 4 faces, for example, the water level sensors S _{1 to} S ₃ in the hot water storage tank 1. The water level sensor S ₁ detects the lower limit amount of the stored hot water HW, the water level sensor S ₂ detects the upper limit amount, and the water level sensor S ₃ detects the allowable amount excess. As a result, the water level detector device 4 causes the stored hot water HW to reach the water level sensor S ₁ in the steady state.
S between the _two, or water level sensor S ₂ was open and close the faucet 3 to maintain a slightly elevated level, when the water level sensor S ₃ was detected so as to inform the user or the like by operating the alarm or the like and ing.

An overflow pipe 5 discharges the stored hot water HW that has reached the same level as or slightly higher than the water level sensor S ₃ of the water level detection device 4 to the outside of the hot water storage tank 1.

Reference numeral 6 denotes a hot water outflow pipe having one end connected to the hot water storage tank 1, and the other end has a required hot water tap (not shown) in the case of a hot water supply system.
In the case of a heating system, the required heat exchanger (not shown)
, And so on. Further, this utilization terminal device is connected to the hot water storage tank 1 through the hot water return pipe 7, thereby forming a hot water circulation system passage.
Reference numeral 8 denotes the hot water outflow pipe 6 to the terminal device for use and the hot water return pipe 7
It is a circulation pump that circulates the stored hot water HW. A heater 9 such as an electric heater is arranged near the bottom of the hot water storage tank 1. The heater 9 is controlled by a temperature sensor or the like (not shown) for the stored hot water HW so as to maintain the stored hot water HW at a constant temperature.

Although these configurations are known, drain pipes, pipes such as expansion pipes, auxiliary equipment members, and the like are also provided as needed by appropriate constituent means.

Reference numeral 10 denotes the deaerator according to the present invention attached to the hot water storage tank 1 having the above-mentioned configuration.

The deaerator 10 connects a degassing pump 11 for pumping the stored hot water HW near the bottom of the hot water tank 1 or near the heater 9, one end to the degassing pump 11, and the other end side 12a for storing hot water. It is composed of a sprinkling pipe 12 which extends and faces the upper space A in the tank 1. The sprinkling pipe 12 has a large number of jet outlets 12b formed on the pipe wall at the terminal side 12a in the hot water storage tank 1, and the hot water pumped up is jetted from the jet outlet 12b as trickle water HWa to store hot water in the tank HW.
It is to be sprayed and refluxed again.

In the figure, one end side of the degassing pump 11 and the sprinkling pipe 12 is provided outside the hot water storage tank 1, but in consideration of the temperature drop of the pumped hot water, the heat insulation treatment is performed or the hot water storage tank 1 is provided. Appropriate configurations such as provision or the like are possible.

In the above configuration, when removing the gas B existing as fine bubbles in the stored hot water HW, the degassing pump 11 is driven.

Then, the degassing pump 11 sucks the stored warm water HW, pumps it up, and sends it to the sprinkler pipe 12 side. Terminal side 12a of sprinkler 12
Since a large number of jet outlets 12b are opened, the hot water fed above is jetted as trickle water HWa from the jet outlets 12b, sprayed on the upper surface of the stored hot water HW, and is stored again. Then, in this spraying process, the trickle water HWa comes into contact with the surrounding air in the upper space A, whereby the gas B existing as fine bubbles in the trickle water HWa is instantaneously absorbed in the surrounding air and the trickle water HWa. Will be dissipated from.

Therefore, when the trickle water HWa reaches the lower surface of the stored warm water HW, the degassing water can be obtained by effectively removing the gas B.

The deaeration can be performed by setting the operation amount time such that the stored amount is pumped up to the front, for example.

The deaeration operation may be controlled, for example, so as to be performed prior to the driving of the circulation pump 8 or at the same time as the heating of the heater 9 is started.

<Effect of the Invention> As described above, according to the present invention, by attaching the deaerator including the deaerating pump and the sprinkling pipe to the open-type hot water storage tank, it is extremely quick and effective from the stored warm water. The bubbles can be removed.

Therefore, it is possible to prevent the excess gas consisting of the bubbles from flowing into the hot water circulation piping system such as the hot water outgoing pipe, the terminal device, and the hot water return pipe, and to the hot water supply and / or the heating piping system with a simple configuration. It is possible to obtain an open hot water storage tank that brings about a favorable effect.

[Brief description of drawings]

The figure is a structural explanatory view showing an open type hot water storage tank provided with a deaerator. 1 ... Open hot water storage tank, 2 ... Make-up water pipe, 4 ... Water level detection device, 5 ... Overflow pipe, 6 ... Hot water outflow pipe, 7 ... Hot water return pipe, 9 ... Heater, 10 ... Degassing device, 11 ... Degassing Pump, 12… Sprinkler, 12b…
Fountain, A… Upper space, B… Gas (bubble), HW… Reserved hot water, HW
a ... trickle water.

Claims (1)

[Scope of utility model registration request] 1. A water pipe that forms a space communicating with the outside air in the upper part of the tank, supplies water to the tank and stops water supply, an overflow pipe that discharges stored water above a predetermined water level, and a stored water A hot water outflow pipe to be supplied to the utilization terminal device, and a hot water return pipe for returning the warm water from the utilization terminal device to the inside of the bath are respectively connected to hot water storage tanks, and in the bath, the water level is detected to detect the water pipe of the water pipe. A water level detection device that controls the supply and stop of supply and a heater for heating the stored water are provided, and the stored water near the bottom of the tank or near the heater is pumped to the space above the tank. An open type hot water storage tank with a deaerator, which is provided with a deaerator for spraying and circulating the water as trickle water into the stored water in the tank in the space.