JPS593657B2 - Onsui Danbo Souchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water heating system, and more particularly to an improved sealed heating circuit system equipped with an expansion tank, a safety valve, an automatic air vent, and the like.

Traditionally, this type of heating system boosts the pressure of circulating water to obtain high-temperature water, which has the advantage of reducing the capacity of the circulation pump and reducing the diameter of the piping, which improves heat dissipation capacity. However, it is necessary to seal the inside of the pipe, making it impossible to use the conventional open-type cistern that supplies water using potential energy.

For this reason, in most cases conventionally, water is supplied at tap water pressure via a pressure reducing valve for the initial water supply during construction, but this not only poses problems for the pressure resistance of each element that makes up the heating system. There are no end to problems such as conflicts with the Water Supply Act.

Additionally, since it is a sealed circuit, it must be equipped with an expansion tank that absorbs the expansion of the blue water, a safety valve that releases abnormal pressure of the blue water, and an automatic air vent valve that automatically releases the air inside the pipe, and each of these parts is configured separately. This not only makes the system complicated and expensive, but also requires great care to prevent water leakage due to the increased number of joints.

The present invention solves the above drawbacks with a simple and low-profile device.

The embodiment will be described below with reference to the drawings. A water tank 5 is provided at the upper end of a heat exchanger 2 having a combustion device 3 at its lower part, so as to be attached and fixed between the top of the outer device and the top of the outer device.

This water tank 5 is formed by two cylindrical bodies of a bottom cylinder part 6,
The interior includes a rubber-like elastic body 7 provided with a float tank 8 having floats 9 on its upper surface.

Reference numeral 11 denotes a bypass provided between the heat exchanger 2 and the upper part of the water tank 5, and a safety valve 12 is interposed between the heat exchanger 2 and the upper part of the water tank 5, and the pressure can be regulated by a buffer mechanism such as a spring, and the valve operation can be operated manually. ing.

On the other hand, a heating outgoing pipe 13 is connected to the lower part of the heat exchanger 2 via a circulation pump 14, and is coupled to a radiator 15 through an external device.

A heating return pipe 13' is connected to the radiator 15, passes through the external device, and is connected to the upper part of the heat exchanger 2.

In addition, 16 is a water supply port lid, and 4 is a combustion flame.

Further, 10 is a water level switch that detects the water level in the water tank 5, and is electrically connected to the combustion device 3 and the circulation pump 14.

Next, in terms of operation, the water inlet cover 16 is opened and water is injected as shown in a in the figure.

Water descends in the water tank 5 as shown by the arrow, initially in the float tank 8.
The inner float 9 is pushed in the -F direction and collected in the heat exchanger 2.

When a certain amount of water is stored in the heat exchanger 2, the circulation pump 14 is operated to supply water to each piping and radiator.

Air from the piping or the radiator easily escapes from the safety valve 12 attached to the bypass 11 to the water tank 5 as shown in d due to the pushing pressure caused by the operation of the circulation pump 14.

In addition, at the initial stage of water supply, as mentioned above, manually close the safety valve 12.
Open the inner valve part to the atmosphere in advance.

Also, a part of the air escapes through the float tank 8 in the water supply tank 5 through a path opposite to the water injection a.

When each element of the heating system is filled with water, water begins to overflow into the water supply tank 5, the float 9 in the float tank 8 is raised, the water inlet 8 is closed, and water supply is completed.

Then, the valve portion of the safety valve 12 is closed, and the system becomes airtight.

Thereafter, the water in the heat exchanger 2 is heated to hot water by the radiant heat of the flame 4 formed by the combustion device 3, and by the operation of the circulation pump 14, the hot water is sent to each radiator 15 for heat exchange. It circulates to the heat exchanger 2 through the heating return pipe 13'.

The expansion at that time is absorbed by the rubber-like elastic body 7 inside the water tank 5 being displaced upward as shown by the broken line.

During this operation, the circulating water in the pipes was abnormally heated by 7JO.
When the elastic body 7 is unable to absorb the expansion and the pressure inside the pipe increases, the safety valve 12 opens and the abnormal pressure hydraulic power is discharged into the water tank 5 from the bypass 11.

When the total amount of water in the system decreases, the float 9 in the float tank 8 descends, and the reduced amount is automatically replenished from the makeup water stored in the water supply tank 5.

Note that if there is leakage from the joint, it will be replenished in the same way.

As can be seen from the above, this float tank 8 serves not only as a means of replenishment but also as a means of venting air.

The water level switch 10 detects the amount of make-up water in the water tank 5, and works either electrically or mechanically, and is electrically connected to the circulation pump as well as the combustion device. If the number of water drops below a certain permissible limit due to other reasons, the circulation pump and combustion equipment will be stopped.

As explained above, with the configuration of the present invention, the initial water supply is carried out in the water supply tank installed on the top of the heat exchanger, so the tap water pressure can be temporarily divided, and the heat exchanger that generally holds the largest amount of water in the entire system Since water can be stored inside the heat exchanger, the water supply time can be shortened. ■In conjunction with the feature 1 above, the circulation pump is installed at the bottom of the heat exchanger, so the circulation pump itself has a self-priming function. In addition, the problem of air leakage inside the pump does not occur, and the life of the pump is significantly extended.

In addition, since the circulation pump is installed on the heating outgoing pipe side, the pushing pressure of the pump can be used during the initial stage of water supply, which makes it easier for air to escape and saves you the trouble of removing air. It has a built-in elastic body that acts as a water tank, and a float tank can be installed to perform automatic water supply and automatic air removal, and these functions are integrated.
The structure is simpler, and the construction is easier and the floor space is lower than the conventional system that has an expansion tank, safety valve, and automatic air vent valve installed independently.

Moreover, there are no joints, so there is no need to worry about water leakage. ■A bypass with a safety valve interposed between the upper part of the heat exchanger and the upper part of the water tank is installed, so that the water released in the event of abnormal pressure is kept inside the water tank. This simple and low-floor equipment provides features such as the ability to return the water to water at high temperatures and eliminate the risk of high-temperature water.

[Brief explanation of the drawing]

The figure is a sectional view of a device showing an embodiment of the present invention. 2...Heat exchanger, 5...Water tank, 7.
...Elastic body, 11...Bypass, 12.
... Safety valve, 13 ... Heating out pipe, 13'
... Heating return pipe, 14 ... Circulation pump 0

Claims (1)

[Claims] 1. A heat exchanger, a heating outgoing pipe and a heating return pipe connected to this heat exchanger, a circulation pump provided on the heating outgoing pipe, and a circulation pump provided on the heat exchanger to supply water to this heat exchanger. The heat exchanger and the water tank are connected to each other, and a bypass is provided with a safety valve that opens when the internal pressure of the heat exchanger exceeds a certain level. A hot water heating device that has a check valve function for a water tank and also includes an elastic body that absorbs the expansion of water in the heat exchanger by displacement.