JPH0953833A - Hot-water heating equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make equipment small in size and to attain space-saving in regard to a place of installation by a construction wherein an injection port equipped with an injection valve is provided on the inflow side of a circulating pump and at a position being higher than the circulating pump. SOLUTION: In an equipment main body 1, fuel such as kerosene or gas is burnt by a burner 3 in a boiler body 2 and water, antifreeze or the like in a circulation passage 4 is heated and circulated by a heat exchanger 5. An injection port 10 is provided at a position being higher than a circulating pump 9 and lower than a safety valve 8, while an injection valve 11 is provided between the circulation passage 4 and the injection port 10 and made to connect with the circulation passage 4 by opening the valve. An air vent valve 13, provided in the upper part of an air separator 12, discharges air outside the circulation passage 4. On the occasion when a heating fluid is filled in the circulation passage 4, it can be filled by the circulating pump 9 in the equipment main body 1 without using a power cistern. Therefore the equipment can be made small in size and also a space for the power cistern is dispensed with in the equipment in the case when it is provided outside the equipment. Moreover, the cost of a system as a whole can be reduced by dispensing with the power cistern.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heater for burning a fuel such as oil or gas and heating a hot fluid by a heat exchanger for circulation.

[0002]

2. Description of the Related Art Conventionally, in this type, there is a closed type in which a circulation path is closed as a circulation system of a heat fluid, which will be described with reference to FIG.
Can body 104 having a built-in combustor 102 and heat exchanger 103
And an inflow valve 105 provided on the upper part of the can body 104 and connected to the inflow side of the heat exchanger 103, and an outflow valve also provided on the upper part of the can body 104 and connected to the outflow side of the heat exchanger 103. The valve 106, the circulation pump 107 that circulates the hot fluid heated in the can 104 and passed through the outflow valve 106, and the safety valve 108 provided on the inflow side of the circulation pump 107 were incorporated.

Further, in the apparatus main body 101, a pressure gauge 109 for detecting and displaying the pressure in the circulation path, and an air for separating the heat fluid in the circulation path from the heat fluid when air is mixed. Separator 110 and the air separator 11
0, an air vent valve 111 connected to the upper part of 0 to exhaust the separated air to the outside of the circulation path, and an air separator 11
It is connected to the lower part of 0 and the inside is a diaphragm 1
A closed expansion tank 113 that stores the thermal fluid, which is divided into upper and lower parts by 12 and the air is separated in the tank,
A radiator 114 provided outside is connected to the apparatus main body 101 to form a sealed hot water heating system.

When the hot fluid is filled into the circulation passage such as when the closed hot water heating system is installed or when the heat fluid is exchanged, it is provided on the inflow side of the filling valve 115 provided in the circulation passage and closed at the time of filling. A tank 118 for containing a thermal fluid in the connected connection part 116 and the connection part 117 provided on the outflow side.
And a filling pump 119 for pumping the hot fluid into the circulation path.
And the inflow side valve 12 provided upstream of the tank 118.
0 and the power system turn 122 composed of the outflow side valve 121 provided downstream of the filling pump 119 were connected and operated to fill the hot fluid.

[0005]

By the way, in this conventional device, a power system turn, which is rarely used at the time of installation or replacement at an interval of once a year, is used because of its size and weight. Since it is difficult to bring and connect when filling the hot fluid, it is usually installed in the main body of the device,
It was in a state of being connected to the main body of the device.

Therefore, when the power system is built in, the size of the main body of the apparatus becomes large, and when connecting to the main body of the apparatus, the space is required. Further, since the power system turn itself is expensive, the cost of the system as a whole increases whether it is built in or left connected.

[0007]

The present invention focuses on this point and solves the above-mentioned drawbacks. In particular, the structure thereof includes a combustor, a heat exchanger, a safety valve, a circulation pump, and an air vent valve. In a hot water heating apparatus including a closed expansion tank, an inlet provided with an injection valve is provided on the inflow side of the circulation pump at a position higher than the circulation pump.

[0008]

[Function] When the circulating fluid 4 is filled with the hot fluid, first the safety valve 8
When the hot fluid is put into the inlet 10 and the inlet valve 11 below the inlet 10 is opened after opening, the thermal fluid is pushed by the atmospheric pressure and flows into the circulation path 4. Then, the air in the circulation path 4 is removed from the safety valve 8 and the air vent valve 13 by the amount of the inflowing heat fluid, and the heat fluid flowing into the circulation path 4 is
When the circulation path 4 is filled, the inflow into the circulation path 4 is stopped.

When the circulation pump 9 is operated when the flow of the heat fluid into the circulation passage 4 is stopped, the heat fluid which has already flowed into the circulation passage 4 is pushed by the circulation pump 9 and remains in the circulation passage 4. The air that is trapped is the safety valve 8 or the air vent valve 13.
The hot fluid flows out from the inlet port 10 and flows into the circulation path 4 from the inlet 10.

When all the air in the circulation path 4 is released, the safety valve 8 is closed, the inflow valve 6 or the outflow valve 7 connected to the can body 2 is closed, and the circulation path 4 is closed. In this state, the circulation pump 9 is continuously operated to store the hot fluid in the closed expansion tank 14. And circuit 4
When the internal pressure becomes higher than a predetermined value, the injection valve 11
Is closed to stop the circulation pump 9, and then the safety valve 8 is operated to gradually remove the hot fluid, thereby adjusting the pressure in the circulation path 4 to a predetermined value and completing the filling of the hot fluid.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a hot water heating apparatus according to the present invention will be described with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a main body of the apparatus, which burns fuel such as oil and gas in a combustor 3 in a can body 2 and heats fluid such as water and antifreeze in a circulation path 4 by a heat exchanger 5 in the can body 2. It is heated and circulated. Reference numeral 6 denotes an inflow valve, which is provided on the inflow side of the can body 2 for the thermal fluid, and is opened to allow the thermal fluid in the circulation path 4 to flow into the can body 2. An outflow valve 7 is provided on the outflow side of the can body 2 for the thermal fluid, and when opened, the thermal fluid in the can body 2 flows out to the circulation path 4.

A safety valve 8 is provided at a position downstream of the outflow valve 7 and higher than the outflow valve 7, and automatically when the pressure in the circulation path 4 exceeds a preset value, for example, 1.0 Kgf / cm ^2. It is also possible to open the valve to reduce the pressure in the circulation path 4 and to manually open the valve arbitrarily. A circulation pump 9 is composed of a non-self-priming pump and circulates the heat fluid in the circulation path 4.

An injection port 10 is provided at a position higher than the circulation pump 9 and lower than the safety valve 8 so that a fixed amount of hot fluid can be put and stored therein. An injection valve 11 is provided between the circulation path 4 and the injection port 10, and the injection port 10 is connected to the circulation path 4 by opening the valve.

Reference numeral 12 denotes an air separator having a diameter larger than that of the circulation pipe constituting the circulation path 4, a plurality of baffle plates are obliquely provided inside, and the baffle plates collide with the heat fluid, so that the heat fluid inside If the air is mixed in, the entrained air is separated into the upper part and the deflated hot fluid is separated into the lower part. Reference numeral 13 denotes an air vent valve, which is connected to the upper part of the air separator 12 and discharges the air separated in the air separator 12 to the outside of the circulation path 4.

Reference numeral 14 is a closed expansion tank, which is connected to the lower portion of the air separator 12 and is provided.
The inside of the air is separated from the hot fluid by the pressure of the circulation pump 9, and the inside is divided into upper and lower spaces by a diaphragm 15 made of an elastic material such as rubber. 16
Is a pressure gauge for detecting and displaying the pressure in the circulation path 4. Reference numeral 17 denotes a radiator, which is installed in a room or the like, is connected to the circulation path 4, and radiates heat by the thermal fluid circulated from the apparatus body 1.

Next, the operation of filling the circulation path 4 with the hot fluid will be described. First, when the safety valve 8 is manually opened and the thermal fluid is injected into the inlet 10 to open the inlet valve 11, the thermal fluid flows from the inlet 10 through the inlet valve 11 into the circulation path 4 due to atmospheric pressure. In addition, the air in the circulation path 4 flows out of the circulation path 4 from the air vent valve 13 and the safety valve 8 by the amount of the inflowing heat fluid. When the thermal fluid that has flowed into the circulation path 4 fills the circulation path 4, the flow of heat fluid into the circulation path 4 stops.

When the inflow of the hot fluid stops, the safety valve 8 is closed, the reduced amount of the heat medium is added to the inlet 10, and then the circulation pump 9 is operated, so that the heat fluid in the circulation passage 4 is pumped by the pressure of the pump. Then, the thermal fluid starts to flow into the circulation path 4 from the injection port 10 again, and the air remaining in the circulation path 4 flows out of the circulation path 4 through the injection port 10 and the air vent valve 13. Then, after the air does not come out from the inlet 10 or the air vent valve 13, the inflow valve 6 or the outflow valve 7 is closed to close the circulation path 4, and in that state, the circulation pump 9 is further operated to continue to operate from the inlet 10. The thermal fluid is caused to flow into the circulation path 4 and is stored in the sealed expansion tank 14.

The diaphragm 15 in the hermetically-sealed expansion tank 14 has a convex cross section at first as shown in FIG. 2, and the upper space in the tank is smaller than the lower space. When the inflow valve 6 or the outflow valve 7 is closed and the circulation path 4 is closed and the circulation pump 9 is continuously operated, the thermal fluid having no place goes against the repulsive force of the diaphragm 15 due to the pressure of the circulation pump 9 and the closed expansion tank. It accumulates in the upper space in 14 more and more, and the diaphragm 15 has a convex section in the cross section as shown in FIG. 1, and the upper space in the tank becomes larger than the lower space. Hot fluid accumulates.

The pressure in the circulation path 4 is a value larger than a predetermined value, for example 0.5 Kgf / cm ² , for example 0.8 to
When the pressure reaches 0.9 Kgf / cm ² , the circulation pump 9 is stopped and the injection valve 11 is closed. Then, the closed inflow valve 6 or outflow valve 7 is opened to open the circulation path 4,
The safety valve 8 is operated to gradually remove the thermal fluid in the circulation path 4 by the repulsive force of the diaphragm 15 in the closed expansion tank 14, and the pressure in the circulation path 4 is adjusted to a predetermined value while watching the display of the pressure gauge 16. Adjust to 0.5 Kgf / cm ² . Then, the operation of the safety valve 8 is stopped and the filling of the heat medium is completed.

When the first circulation path 4 is filled with the hot fluid, even if the circulation pump 9 is operated before it is completely filled,
Since the heat fluid and air pumped by the circulation pump 9 are sent from the outflow side of the pump to the radiator 17, even if the pressure in the circulation path 4 suddenly rises, the hot fluid and air are circulated from the air vent valve 13 and the safety valve 8 accordingly. Since the air in the passage 4 escapes, the inlet 1
The hot fluid put in 0 does not blow out.

As described above, in the hot water heating apparatus of the present invention,
When the thermal fluid is filled into the circulation path 4 in the closed hot water heating system, the circulation pump 9 in the apparatus body 1 can be used to fill the fluid without using the power cistern. In addition, when it is installed outside the device, the installation space is unnecessary. Further, the cost can be reduced because the power system is not necessary for the entire system. Further, since the operation of filling the circulation path 4 with the thermal fluid can be performed by the apparatus main body 1, the operation of filling the thermal fluid can be easily performed without a dedicated apparatus.

[0022]

As described above, according to the present invention, in the hot water heating apparatus including the combustor, the heat exchanger, the safety valve, the circulation pump, the air vent valve, and the closed expansion tank, Since the inlet provided with the inlet valve is provided on the inflow side of the circulation pump at a position higher than the circulation pump, the circulation pump 9 in the apparatus body 1 fills the thermal fluid without using the power systern. As a result, it is possible to reduce the size of the device, save the installation space, reduce the cost of the heating system as a whole, and facilitate the filling work of the hot fluid.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a hot water heating apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic explanatory view of a conventional sealed hot water heating device.

[Explanation of symbols] 3 Combustor 5 Heat exchanger 8 Safety valve 9 Circulation pump 10 Injection port 11 Injection valve 13 Air vent valve 14 Closed expansion tank

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshitake Honma 7-7 Higashishinbo, Sanjo City, Niigata Prefecture Corona Co., Ltd. (72) Yoshiyuki Mame 7-7 Higashishinbo, Sanjo City, Niigata Prefecture Corona Co., Ltd. Within

Claims (1)

[Claims] 1. A combustor 3, a heat exchanger 5, and a safety valve 8
In a hot water heating device including a circulation pump 9, an air vent valve 13, and a closed expansion tank 14, an inlet 10 having an injection valve 11 is provided on the inflow side of the circulation pump 9 from the circulation pump 9. A hot water heating system characterized by being installed at a high position.