JPH03181744A - Hot-water supply apparatus - Google Patents

Abstract

PURPOSE:To reduce the cost by a method wherein a flow controller includes a flow control valve and a valve which is opened or closed in combination with the motion of the flow control valve, and the flow control valve consists of a first pressure chamber to which a hot-water outlet pipe from a heat exchanger is connected, a second pressure chamber to which a first and second hot-water feed pipes are connected and a connection part which is located between the first and second pressure chambers and moved in forward and reverse directions to control the water flow at two positions. CONSTITUTION:When hot-water is fed in a bathtub 24, the water enters a water inlet pipe 16, passes a flow sensor 17, is heated and turned into hot-water at a heat exchanger 18 by combustion of a burner 28, passes a flow control valve disc 38 of a flow control valve main body 20, and is supplied from valve 42 into the bathtub 42 through a hot-water feed pipe 22. During hot-water feed to the bathtub 24, the flow control valve disc 38 is moved to the right by the action of a motor 51 and the clearance between a converging conical flow path 36 and cylindrical part 40 is enlarged so as to allow hot-water to be fed at a high flow rate. Next, in the case hot-water is supplied through a faucet 23, the flow control valve disc 38 is moved to the left and flow control is carried out with the valve 42 closed. In the case the temperature of hot-water is set at a high temperature with the faucet 23 open, the clearance between a cylindrical flow path 37 and a diverging part 39 is narrowed so that high temperature hot-water is supplied at a low flow rate. On the other hand, in case low temperature hot-water is supplied, the clearance between the cylindrical flow path 37 and the diverging part 39 is enlarged so that hot-water can be supplied at a high flow rate.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a water heater that exchanges heat from cold water to hot water.

2. Description of the Related Art Conventionally, this type of technology is constructed as shown in FIG. In FIG. 3, 1 is a water inlet pipe, and the water inlet pipe 2 is provided with a water amount sensor 2. The water inlet pipe 1 is piped to a heat exchanger 3, and a hot water outlet pipe 4 is connected from the heat exchanger 3, and a flow rate regulating valve 6 driven by a motor 5 is connected to the hot water outlet pipe 4.
is installed. A first hot water supply pipe 7 and a second hot water supply pipe 8 are branched from the flow control valve 6, and the first hot water supply pipe 7
The tip of the second hot water pipe 8 goes to the faucet 9, and the tip of the second hot water supply pipe 8 goes to the bathtub 1.
0. 11 is a bypass pipe and an inlet pipe l
and the first hot water supply pipe 7 are connected to each other. Note that 12 is a flow rate switch provided in the bypass pipe 11, and 13 is a solenoid valve. 14 indicates a burner.

15 is a solenoid valve provided in the second hot water supply pipe 8.

To explain the operation of the conventional example configured in this way,
First, when hot water is supplied using the faucet 9, the solenoid valves 13 and 14 are in a closed state. At this time, the water entering from the water inlet pipe 1 undergoes heat exchange in the heat exchanger 3 by combustion in the burner 14, and is turned into hot water, which is discharged from the faucet 9.

At this time, in order to maintain the temperature of the water coming out of the faucet 9 at the set temperature, the flow rate of water is adjusted by the flow W control valve 6. For example, if the setting device is set to a high temperature of 70°C, the flow rate will be reduced, and if set to a low temperature of 40°C, the flow rate will be increased. (The setting device is not shown) On the other hand, when hot water is supplied from the second hot water supply pipe 8 to the bathtub 10, when the setting device is turned on, the solenoid valve 15 is opened and hot water at the set temperature is supplied to the bathtub 10. At this time, the temperature of hot water supplied is adjusted by the flow rate iA regulating valve 6. bathtub 10
When the amount of hot water supplied to the
Hot water supply is stopped. Generally speaking, there are two operations: filling a bathtub with hot water at around 45°C and heating the bathtub at around 80°C.

Problems to be Solved by the Invention However, in the conventional example, since it operates using two units, the flow rate control valve 6 and the solenoid valve 15, two actuators are used, which increases the cost and increases the size.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to control the flow rates of a first hot water pipe and a second hot water pipe with a single actuator, and also to open and close the second hot water pipe, thereby achieving an inexpensive and compact design. It's about trying.

Means for Solving the Problems In order to achieve the above objects, the present invention provides a burner, a heat exchanger that exchanges heat with the burner, a water inlet pipe to the heat exchanger, and a hot water outlet pipe from the heat exchanger. a flow rate regulating means provided in the hot water outlet pipe; a driving means for driving the flow rate regulating means; a first hot water supply pipe and a second hot water supply pipe provided on the outlet side of the flow rate regulating means; The flow rate regulating means includes an opening/closing means for opening and closing a second hot water supply pipe, and the flow rate adjusting means is configured to connect a primary pressure chamber to which a hot water outlet pipe from the heat exchanger is connected, and a first hot water supply pipe and a second hot water supply pipe. The communication part between the provided secondary pressure chambers is moved in two directions, forward and reverse, and the flow 1t1i is maintained at two locations.
The flow control valve is configured to open and close the opening/closing means in conjunction with the movement of the flow control valve.

Function The water heater of the present invention has the above-mentioned configuration, and by moving the flow control valve in two directions, forward and reverse, with one actuator, the second
The second hot water supply pipe is opened to adjust the flow rate, and the second hot water supply pipe is closed to adjust the flow rate to mm.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. In FIGS. 1 and 2, reference numeral 16 indicates a water inlet pipe, and an ice amount sensor 17 is provided on this water inlet pipe 16. The water inlet pipe 16 is piped to a heat exchanger 18 and the heat exchanger 18
A hot water outlet pipe 19 is connected from there.

A flow rate control valve main body 20, which is a flow rate control means, is disposed in the tapping pipe 19. A first hot water supply pipe 21 and a second hot water supply pipe 22 are branched from the flow control valve main body 20, the tip of the first hot water supply pipe 21 goes to the faucet 23, and the tip of the second hot water supply pipe 22 goes to the bathtub. It is piped to 24.

25 is a bypass pipe, which connects the water inlet pipe 16 and the first hot water pipe 21
and are arranged. Note that 26 is a flow rate switch provided in the bypass pipe 25, and 27 is a solenoid valve. 2
8 indicates a burner. To explain the structure of the flow control valve 20, 29 is a valve body, and the valve body 29 is provided with an inlet 30 to which the hot water outlet pipe 19 is connected.
A first pipe connecting the next pressure chamber 31 and the first hot water supply pipe 21
and a second outlet 32 connecting the second hot water pipe 22.
A secondary pressure chamber 34 is provided with an outlet 33.

The primary pressure chamber 31 and the secondary pressure chamber 34 are connected to a communication section 35.
It is communicated with. The shape of the communication portion 35 is composed of a reduced conical flow path 36 and a cylindrical flow path 37 extending from the primary pressure chamber 31 to the secondary pressure chamber 34 . The communication part 3
A flow rate control valve 38, which is a flow rate control means that can move in two directions, forward and reverse, to adjust the flow rate, is provided inside the valve 5. The shape of the flow control valve 3B is composed of an enlarged part 39 in which the cross-sectional area of the flow control valve 38 is enlarged and a cylindrical part 40 in which the cross-sectional area is constant. A valve shaft 41 is provided on the secondary pressure chamber 34 side of the flow rate control valve 38, and a valve 42, which is an opening/closing means for opening and closing the second hot water pipe 22 side, is biased by a spring 43 at the tip thereof. There is.

44 is a retaining ring. In addition, the 1 of the flow rate regulating valve 38
On the side of the next pressure chamber 31, a piston portion 46 is formed integrally with the flow control valve 38 and sealed with an O-ring 45. A tertiary pressure chamber 47 is provided by this piston portion 46, and this tertiary pressure chamber 47 and the secondary pressure chamber 34 are communicated with each other through a communication hole 48. 49 is a drive shaft directly connected to the piston portion 46, and this drive shaft 4
A gear 50 is provided at the tip of the gear 5.
0 is connected to a motor 51 which is a driving means. 52
53 indicates an inlet water temperature thermistor, 53 indicates an outlet water temperature thermistor, and 54 indicates a setting device.

Next, the operation of this embodiment will be explained with reference to FIGS. 1 and 2. First, the operation when supplying hot water to the bathtub 24 is explained first.
To explain with a diagram, the water entering the water inlet pipe 16 passes through the flow rate sensor 17 and is heat-exchanged into hot water by combustion in the burner 28 in the heat exchanger 18 section.
8 and from the valve 42 through the second hot water supply pipe 22 to the bathtub 2.
Hot water is supplied to 4. To supply hot water to the bathtub 24, for example, when filling hot water at 45° C., the flow 1 control valve 38 moves to the right in the figure by the operation of the motor 51, and the flow 1 control valve 38 moves to the right side in the figure to close the gap between the reduced circle S#, the flow path 36, and the cylindrical portion 40. It can be made large and can supply a large amount of hot water. At this time, the second outlet 33 of the valve 42 is opened by a retaining ring 44 provided on the valve shaft 41. For example, 80
When supplying hot water around ℃ to the bathtub 24, the flow rate 11 is
The control valve 38 moves to the left in the figure to reduce the flow rate.

Next, the operation when supplying hot water from the faucet 23 side will be explained with reference to FIG.
2 is closed, the flow rate is adjusted. When all faucets 23 are open and the hot water temperature is set to a high temperature of around 70°C, by narrowing the gap between the cylindrical flow path 37 and the enlarged part 39,
It is possible to supply hot water by restricting the flow rate. On the other hand, when obtaining low-temperature water of around 40° C., for example, by widening the gap between the cylindrical channel 37 and the enlarged portion 39, a large amount of hot water can be dispensed.

In this embodiment, by connecting the first hot water supply pipe to the faucet and the second hot water supply pipe to the bathtub, it is possible to control the flow rate at each time of hot water supply, and since the operation of the valve 42 is inactive,
There is no occurrence of water hammer or the like when the valve 42 is opened or closed, resulting in excellent usability and reliability.

Effects of the Invention As described above, the present invention provides a burner, a heat exchanger for exchanging heat with the burner, a water inlet pipe to the heat exchanger, a hot water outlet pipe from the heat exchanger, and a hot water outlet pipe provided in the hot water outlet pipe. a flow rate regulating means for controlling the flow rate, a driving means for driving the flow rate regulating means; The flow rate regulating means includes a first hot water supply pipe and a second hot water supply pipe provided on the outlet side of the regulating means, and an opening/closing means for opening and closing the second hot water supply pipe, and the flow rate regulating means controls the flow rate of the hot water from the heat exchanger. The communication part between the primary pressure chamber to which the pipe is connected and the secondary pressure chamber in which the first hot water supply pipe and the second hot water supply pipe are provided is moved in two directions, forward and reverse, and the flow rate is adjusted at two locations. By configuring the flow rate control valve and the opening/closing means to open and close in conjunction with the movement of the flow rate control valve, a single actuator has a flow rate control function and a channel opening/closing function, resulting in cost reduction. I can figure it out.

Further, by combining the two functions described above, the device can be made smaller and more compact, making it extremely easy to install it in equipment.

[Brief explanation of drawings]

1 and 2 are system circuit diagrams of a water heater showing an embodiment of the present invention, and FIG. 3 is a system circuit diagram of a water heater showing a conventional example. 16... Water inlet pipe, 18... Heat exchanger,
19... Hot water outlet pipe, 20... Flow rate adjustment means, 21... First hot water supply pipe, 22...
Second hot water pipe, 28... Burner, 31...
...Primary pressure chamber, 34...Secondary pressure chamber, 38.
...Flow control valve, 42... Opening/closing means (valve).

Claims (2)

[Claims] (1) a burner, a heat exchanger that exchanges heat with the burner, a water inlet pipe to the heat exchanger, a hot water outlet pipe from the heat exchanger, a flow rate adjustment means provided in the hot water outlet pipe, and the The method comprises a driving means for driving the flow rate regulating means, a first hot water supply pipe and a second hot water supply pipe provided on the outlet side of the flow rate regulating means, and an opening/closing means for opening and closing the second hot water supply pipe, The flow rate adjusting means controls the communication part between the primary pressure chamber to which the hot water outlet pipe from the heat exchanger is connected and the secondary pressure chamber in which the first hot water supply pipe and the second hot water supply pipe are provided, in the forward and reverse directions. The water heater includes a flow rate control valve that moves in two directions and adjusts the flow rate at two locations, and a water heater that opens and closes the opening/closing means in conjunction with the movement of the flow rate control valve. (2) The water heater according to claim 1, wherein the first hot water supply pipe is connected to the hot water faucet and the second hot water supply pipe is connected to the bathtub.