JPH06201186A - Mixing tank for one can two circuit type hot-water supplier - Google Patents

Abstract

PURPOSE:To prevent a hot water supplier of the one can two circuit type from supplying high-temperature water when the hot-water supply circuit is opened directly after the operation of the circulating circuit has been stopped. CONSTITUTION:In a hot-water supplier of the direct pressure one can two circuit type the hot-water pipe 6 connected to a mixing tank 5 is projected into the mixing tank 5 and a first outlet 7 and a second outlet 8 are provided in the projected part 6a. A shut-off valve 9 is provided near the first outlet 7 as a means of opening and closing the first outlet 7 and the second outlet 8 depending on the temperature of hot-water supplied so that, when the temperature of hot water flowing past the hot-water supply pipe 6 is high, the temperature of the hot water is lowered (moderated) by passing the high-temperature water through the mixing tank 5 and then the hot water is supplied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-can, two-circuit type water heater which receives a pressure of water and has a hot water supply circuit and a circulation circuit for reheating.

[0002]

2. Description of the Related Art A one-can, two-circuit water heater is a hot water supply circuit for baths, cooking, washbasins, etc. It is provided with a circulation circuit used for heating.

There are two types of water supply systems for supplying water to the hot water supply system: one that reduces the water supply pressure using a pressure reducing valve, and one that supplies the water pressure directly without pressure reduction. In general, a water heater for forming a hot water supply circuit and a circulator for forming a circulation circuit are wound around an outer shell of a combustion chamber having a burner, and a thick copper tube is often used.

[0004]

In the hot water supply system of the one-can, two-circuit type, the hot water supply circuit is also heated during operation of the circulation circuit, and if the hot water tap is opened after the circulation circuit is operated, it takes a short time. Hot water may come out. For this reason, "hot water comes out."
It is described in the cautionary note, or a method is adopted in which a solenoid valve is installed in the hot water supply path to send water to lower the hot water outlet temperature, but it is desired that a safe device with a simple structure appears. Is.

[0005]

The present invention comprises a combustion chamber 2 having a burner 1, a hot water supply circuit 3, and a circulation circuit 4 used for reheating the bath, and a mixing tank 5 downstream of the hot water supply circuit 3. In the direct pressure type one-can circuit type water heater provided with, the hot water supply pipe 6 of the hot water supply circuit 3 connected to the mixing tank 5 is connected to the mixing tank 5
The first outlet 7 and the second outlet 8 at the protrusion 6a.
And a shut-off valve 9 that opens and closes at a constant hot water supply temperature at the first outlet 7, and the hot water flowing through the hot water supply circuit 3 flows into the mixing tank 5 when the first outlet 7 is opened, This is a mixing tank for a one-can two-circuit water heater characterized in that when it is closed, it goes straight to the second outlet 8.

If the shut-off valve 9 is moved forward and backward by the balance between the wax element 10 that expands and contracts depending on the temperature and the spring 11 that compresses the wax element 10, the flow path changes depending on the temperature of the hot water passing through the hot water supply pipe 6. The high-temperature hot water may be temporarily retained in the mixing tank 5 and then discharged.

[0007]

The operation will be described. When the operation switch (not shown) is turned on to start the operation of the water heater, the hot water supply circuit 3 and the circulation circuit 4 are heated by the burner 1, and the operation is performed up to the temperature control set value of the temperature sensor. If you continue and open the faucet at the end of the hot water supply circuit 3, it will be poured into a bathtub or the like.

On the other hand, the hot water is circulated between the bathtub and the like and the circulation circuit 4 by the circulation pump 13, and the circulation is continued up to a desired temperature control set value to be used for additional heating and heat retention.

[0009]

EXAMPLES Next, the structure will be described with reference to the drawings showing examples. 1 is a burner which is a heat source of a water heater, 2 is a combustion chamber into which combustion flame and combustion gas of the burner 1 are sent, and 3 is a combustion chamber 2. A hot water supply circuit including a pipe-shaped heat exchange unit that is attached to a wall to absorb combustion heat and supply hot water, 4 is a pipe-shaped circulation circuit installed in parallel with the hot water supply circuit 3, and the hot water supply circuit 3 and the circulation circuit 4
In order to improve the heat exchange efficiency, a heat absorption fin A arranged inside the combustion chamber 2 is attached to the water supply side.

Reference numeral 5 denotes a mixing tank provided to prevent the high-temperature hot water boiled in the hot water supply circuit 3 from jetting out when the hot water comes out. It serves as a buffer for the water flow and the hot water temperature. There is. Reference numeral 6 denotes a hot water supply pipe of the hot water supply circuit 3 which is connected to the mixing tank 5.
Is formed.

Reference numeral 7 is a first outlet provided near the inlet of the mixing tank 5, 8 is a second outlet that is open at the back of the mixing tank 5, or is near the back, and 9 is forward / backward in the plunge 6a of the hot water supply pipe 6. Is a closing valve for opening and closing the first outlet 7, and when the hot water passing through the hot water supply pipe 6 is at a high temperature, the first outlet 7 is opened by the closing valve 9, and the hot water supplied at this time is temporarily stored in the mixing tank 5. After the water is stored, it will be discharged. In addition, the hot water temperature is low, and the hot water supplied when the first outlet 7 is closed by the stop valve 9 goes straight to the second outlet 8.

Reference numeral 9a denotes a through hole provided in a shutoff valve 9 that opens and closes the first outlet 7 by advancing and retracting in the plunge portion 6a of the hot water supply pipe 6, and when the shutoff valve 9 closes the first outlet 7, The hot water goes straight through the through hole 9a toward the second outlet. Therefore, when the first outlet 7 is open, the valve structure is such that it cannot proceed toward the second outlet 8.

Reference numeral 10 denotes a wax element in which waxes that expand and contract at a constant temperature are enclosed, and a closing valve 9 is advanced and retracted by a piston 10a that transmits expansion and contraction of the wax. When the temperature of the hot water to be sensed is 45 ° C. or higher, the stop valve 9 expands to move the piston 10a.

Reference numeral 11 denotes a spring which applies a force to the piston 10a of the wax element 10 in the compression direction, and cooperates with the expansion and contraction of the wax element 10 to sensitively operate the stop valve 9. Reference numeral 12 is a pressure adjusting screw for finely adjusting the operating point (switching between high temperature water and low temperature water) of the stop valve 9 operated by the wax element 10. A spring 12a is also interposed between the pressure adjusting screw 12 and the wax element 10. Pressing.

Reference numeral 13 is a circulation pump which circulates the hot water by connecting the circulation circuit 4 to the bathtub or the like, and circulates the hot water to the bathtub or the radiator at a constant temperature. Reference numeral 14 is an exhaust passage continuing to the combustion chamber 2, and 15 is an exhaust port.

[0016]

The present invention has the above-described structure and operation, and the hot water supply circuit 3 and the circulation circuit 4 are in operation while the burner 1 is in operation.
Since both of them are heated, even if the hot water supply circuit 3 is maintained at a constant temperature when the hot water supply circuit 3 is used, it is avoided that the hot water supply circuit 3 rises above a predetermined temperature while only the circulation circuit 4 is used. If the hot water supply circuit 3 is opened immediately after the operation of the circulation circuit 4 is stopped, hot water is supplied.

In the present invention, the shutoff valve 9 mounted in the mixing tank 5 opens the first outlet 7 to guide the hot water into the mixing tank 5 when the temperature is high. Since it is mixed with water (which is in the atmosphere and has low temperature), it becomes a low-temperature hot water to supply hot water, so you do not have to worry about being surprised or burned due to the high water temperature.

When the temperature of the hot water passing through the hot water supply pipe 6 is lowered, the shut-off valve 9 is closed and hot water is rushed into the hot water supply pipe 6.
Since the hot water is discharged straight through the inside of the mixing tank 5 without passing through the inside of the mixing tank 5, the hot water temperature is maintained close to the set temperature and is stably supplied.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of the present invention, showing an operating state during normal hot water (low temperature water) hot water supply.

FIG. 2 shows an operating state when hot water is supplied.

FIG. 3 is an overall configuration diagram in which the product of the present invention is mounted on an oil water heater.

[Explanation of symbols]

 1 Burner 2 Combustion Chamber 3 Hot Water Supply Circuit 4 Circulation Circuit 5 Mixing Tank 6 Hot Water Supply Pipe 6a Inrush 7 First Outlet 8 Second Outlet 9 Stop Valve 10 Wax Element 11 Spring

Claims (2)

[Claims] 1. A combustion chamber 2 having a burner 1, a hot water supply circuit 3, and a circulation circuit 4 used for reheating the bath, etc.,
In a direct pressure type 1-can circuit type water heater having a mixing tank 5 provided downstream of the hot water supply circuit 3, the hot water supply pipe 6 of the hot water supply circuit 3 connected to the mixing tank 5 is thrust into the mixing tank 5, and the plunging portion 6 is provided.
The first outlet 7 and the second outlet 8 are provided at a, and the stop valve 9 that opens and closes at a constant hot water supply temperature is provided at the first outlet 7.
The hot water flowing into the mixing tank 5 flows into the mixing tank 5 when the first outlet 7 is opened, and goes straight to the second outlet 8 when the first outlet 7 is closed. 2. The one-can, two-circuit water heater according to claim 1, wherein the shut-off valve 9 moves forward and backward by a balance between a wax element 10 that expands and contracts depending on temperature and a spring 11 that compresses the wax element 10. Mixing tank.