JPH0676857B2 - Hot water pump - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a hot water device that pumps hot water heated by a kettle at a vapor pressure without using a circulation pump.

[Prior Art] A hot water device that pumps hot water heated in a conventional kettle with vapor pressure can generate water in a kettle while it is still boiling, even if the water in the kettle can be pumped to a desired location. Since the pressure is high due to the steam and the water that has flowed into the kettle immediately evaporates if the kettle is being heated, it is difficult to supply water to the kettle that has reached a high temperature. In order to solve this problem, the applicant of the present invention has disclosed that
-23731 is proposed.

[Problems to be Solved by the Invention] In the above proposal, an air pipe is provided between the upper part of the kettle and the open tank, and an on-off valve that works in conjunction with the water level of the kettle is operated to adjust the pressure of the kettle to air. With a structure that allows it to be pulled out by a pipe, the pressure of the kettle becomes atmospheric pressure even when it is boiling when the on-off valve is opened, and water can now be supplied from the open tank to the kettle at a lower position. . However, the heat energy given to the kettle is lost as steam from the air pipe, and it takes a long time from when the on-off valve is opened and water is supplied until hot water is sent out again. It was.

[Means for Solving the Problems] The present invention relates to a boiling water can from a boiling state to an empty boiling,
By selecting an appropriate timing, water can be supplied from an open tank to a kettle without an air pipe. The water stored in an open tank 1 having a water supply port 2 is heated and hot water is supplied by an outflow pipe 7. System, which is provided with a kettle 3 provided at a position lower than the open tank 1, a burner 4 for heating the kettle 3, and a radiator 5 to which hot water is supplied from the kettle 3, the open tank 1 and the kettle 3 And the radiator 5 are connected by a communication pipe 6, an outflow pipe 7 is provided on the outlet side of the radiator 5, and a valve 9 is attached to a communication pipe 6 ′ that connects the open tank 1 and the kettle 3. , Kettle 3
Is provided, and the valve 9 is opened when the empty heating start detection switch 8 detects the start of empty heating.

Further, a pressure switch constituting the emptying start detection switch 8 is attached to the communication pipe 6 ′ to which the valve 9 is attached, and when the kettle 3 has a low pressure, the valve 9 is opened to supply water from the open tank 1 to the kettle 3. It is a thing.

Further, a check valve 11 is attached to the outflow pipe 7 attached to the outlet side of the radiator 5 so as to be applicable to the short outflow pipe 7.

[Description of Action] When it is desired to supply hot water from the outflow pipe 7 in a state where water is supplied to the open tank 1, the kettle 3, and the radiator 5, it is sufficient to ignite the burner 4 to heat the kettle 3. The steam increases the pressure of the kettle 3 to pressurize the water surface of the kettle 3, and hot water of high temperature is pumped to the outflow pipe 7 via the radiator 5.

When all the hot water in the kettle 3 is delivered by the vapor pressure,
The kettle 3 is in an empty state and the steam sent to the radiator 5 is cooled and liquefied, so that the pressure of the kettle 3 is rapidly reduced. If this emptying start is detected by the emptying start detection switch 8 and the valve 9 is opened, the water in the open tank 1 flows into the low-pressure kettle 3 and the water remaining in the kettle 3 is liquefied while Filled with. At this time, burner 4
Since the combustion is continued, the steam generated in the kettle 3 again pumps hot water to the outflow pipe 7.

[Description of Embodiments] The present invention will be described with reference to the embodiments shown in the drawings. 1 is an open tank, 2 is a water supply port of the open tank 1, and the water supply port 2 is formed by opening a lid provided on the upper part of the open tank 1. Opens and can be filled with water. Further, when the water supply port 2 is formed by a water supply pipe line, a water supply means such as a ball tap 10 can be attached to the tip for automatic water injection.

3 is a kettle provided at a position lower than the open tank 1, 4 is a burner for heating the kettle 3, 5 is a radiator to which hot water is supplied from the kettle 3, and the open tank 1, the kettle 3 and the radiator 5 are A valve 9 is attached to a communication pipe 6 ′ that connects the open tank 1 and the kettle 3 by connecting the communication pipe 6. The heating kettle 3 has a heating can 3'attached to a position close to the burner 4, the burner 4 intensively heats the heating can 3 ', and the generated steam pressurizes the hot water of the heating can 3.

6 ″ is a communication pipe connecting the water heater 3 and the radiator 5, 7 is an outflow pipe attached to the outlet side of the radiator 5, and 11 is an outflow pipe 7 provided in the middle of the outflow pipe 7 to the radiator 5. It is a check valve for stopping the flow, and the end of the outflow pipe 7 is piped as it is to a desired place for hot water, and the hot water pressurized by the water heater 3 is pumped through the radiator 5.

Reference numeral 8 denotes an empty heating start detection switch for detecting the start of empty heating of the boiling water can 3. When the empty heating start detection switch 8 detects the start of empty heating, the valve 9 opens to supply the water in the open tank 1 to the boiling water can 3.

That is, the burner 4 intensively heats the heating can 3 ′, the generated steam is stored in the upper part of the water heating can 3, and the steam pressure pushes the water surface of the water heating can 3 and hot water is pumped to the outflow pipe 7 via the radiator 5. It When all the hot water in the heating can 3'and the boiling can 3 is sent out, high temperature steam is sent to the communication pipe 6 ", and this steam is liquefied by the radiator 5. Therefore, immediately after the start of empty heating, the boiling can 3 Since the generated steam is being liquefied more and more by the radiator 5, the water heater 3 holds the low pressure for a while.

Therefore, if the emptying start detection switch 8 detects this time and opens the valve 9, the water in the open tank 1 will try to flow into the kettle 3 at the head pressure, while the steam in the kettle 3 will open.
However, since this steam is liquefied by the water flowing down the communication pipe 6 ′ and the amount of steam generated in the boiling water can 3 is also small, the water in the open tank 1 is
Is what flows into. Then, the water in the kettle 3 is liquefied faster than the water flowing into the kettle 3 is liquefied, and the kettle 3 has a negative pressure. It is a quantity.

By the way, when the hot water of the outflow pipe 7 tries to flow back into the hot water can 3 when the hot water can 3 has a negative pressure, when the outflow pipe 7 is long, the flow resistance becomes considerably large, and the open water tank 3 having the low flow resistance becomes the open tank. It comes in from 1.

Further, if the check valve 11 is installed to stop the flow toward the water kettle 3 when the outflow pipe 7 is short, it is possible to connect the water from the outflow pipe 7 to the water kettle 3
The flow to the water tank is stopped, and the water in the open tank 1 is surely removed.
Can be sent to the hot water and sent to the outflow pipe 7 under pressure.

As an embodiment of the empty heating start detection switch 8, pay attention to when the high temperature steam starts to flow in the communication pipe 6 ″ connecting the radiator 5 and the water heating can 3, and attach a temperature sensor to the communication pipe 6 ″ to perform the empty heating. The start of may be detected. Further, as the empty heating start detection switch 8, paying attention to the fact that when the steam is sent to the radiator 5, liquefaction of the steam occurs and the pressure in the kettle 3 is lowered, and the open tank 1 and the kettle 3 are connected to each other. Tube 6 '
It is also possible to attach a pressure switch to and to detect the start of emptying by the signal of the pressure switch.

Further, the radiator 5 to which the hot water of the kettle 3 is supplied not only functions to prevent the steam from being mixed in the outflow pipe 7 even if the steam is sent to the communication pipe 6 ″, but the steam sent to the radiator 5 is By liquefying, the pressure in the kettle 3 is kept low, and the pressure in the kettle 3 is kept low even before it becomes completely empty. Even when the opening timing of the valve 9 was varied when water was supplied to the kettle 3 from No. 1, the airlock phenomenon did not occur, and the kettle 3 could be filled with water reliably.

[Explanation of Effect] As described above, in the present invention, attention is paid to the empty heating of the boiling water can 3 that sends out hot water, and a valve 9 attached to the communication pipe 6 ′ between the open tank 1 and the boiling water can 3 slightly before the heating is completed. Since the open circuit is opened, the water in the open tank 1 can surely flow into the kettle 3 and the trouble that the vapor pressure of the kettle 3 becomes high and the supply of hot water is stopped does not occur.

Also, when water flows into the kettle 3, the remaining thermal energy of the steam can be recovered by liquefying it, so there is almost no heat loss to the outside, and if thermal efficiency improves, the timing of pumping hot water will be faster. The amount of hot water supplied is greatly increased.

Further, since the outflow pipe 7 is not directly connected to the kettle 3 but is connected to the kettle 3 via the radiator 5, the steam generated at the start of the boiling of the kettle 3 is liquefied by the radiator 5 to increase the pressure of the kettle 3. Even if the timing of opening the valve 9 by using the pressure change of the water heating can 3 as the emptying start detection switch 8 is slightly deviated, the hot water can be reliably supplied.

Furthermore, when the hot water supply location is close to the kettle 3, the outflow pipe 7
The water in the open tank 1 can surely flow into the boiling water can 3 only by mounting the check valve 11 on it, and there is no restriction on the use place of the device of the present invention.

[Brief description of drawings]

The drawings are cross-sectional views showing an embodiment of the device according to the present invention. 1 ... Open tank, 2 ... Water inlet, 3 ... Water kettle, 4 ...
… Burner, 5 …… Radiator, 6 …… Communication pipe, 7 …… Outflow pipe, 8 …… Boiled start detection switch, 9 …… Valve, 11 ……
Check valve

Claims (3)

[Claims] 1. A system for heating water stored in an open tank (1) having a water supply port (2) and supplying hot water by an outflow pipe (7), which is provided at a lower position than the open tank (1).
A burner 4 for heating the kettle 3 and a radiator 5 to which hot water is supplied from the kettle 3, the open tank 1, the kettle 3 and the radiator 5 are connected by a communication pipe 6, and the radiator 5 An outlet pipe 7 is provided on the outlet side of the valve, a valve 9 is attached to a communication pipe 6'connecting the open tank 1 and the hot water pipe 3, and a dry heating start detection switch 8 for the hot water pipe 3 is provided. A hot water pumping device that opens the valve a when the empty heating start detection switch 8 detects the start of empty heating. 2. The hot water pumping apparatus according to claim 1, wherein a pressure switch constituting an emptying start detection switch 8 is attached to the communication pipe 6'to which the valve 9 is attached, and the valve 9 is opened when the boiling water can 3 has a low pressure. 3. The hot water pumping device according to claim 1, wherein a check valve 11 is attached to the outflow pipe 7 attached to the outlet side of the radiator 5.