JPH02166345A - water heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a water heater.

(b) Conventional technology Conventionally, a valve that automatically controls the amount of water supplied according to the selected capacity of the water heater has been installed in the water supply pipe of a gas instantaneous water heater whose capacity can be changed in multiple stages. There is a system that prevents the water supply amount from exceeding the capacity of the water heater and lowering the water supply temperature (Japanese Patent Application Laid-Open No. 58-217144).

In addition, in a gas instantaneous water heater that controls the hot water temperature by the amount of gas, when the amount of gas exceeds the maximum capacity of the water heater and the hot water temperature cannot be controlled by the amount of gas, the set temperature Some devices are equipped with a valve that automatically reduces the amount of water supplied in order to prevent hot water from flowing beyond the limit and to prevent a drop in the hot water temperature.
Publication No. 950).

(C) Problems to be Solved by the Invention However, in the above-mentioned water heater, it is necessary to provide a capacity selection means or a gas amount control means and a valve for restricting the water supply amount for each water heater, and the hot water supply is not possible on the downstream side of the water heater. When a device, such as a hot water mixing device, is connected, the water heater's water supply amount limiting valve, the hot water heating device's flow rate adjustment valve, the water heater's water supply amount limiting control device, and the hot water mixing device's control device. The structure was unnecessarily complicated as the control device was installed in duplicate, and furthermore, the hot water mixing device and the water heater were controlled separately, making it impossible to control them both in an integrated manner. .

In addition, with the above conventional technology, the ability to restrict the flow rate to prevent a drop in hot water temperature is limited to gas-type water heaters, and cannot be applied to electric or oil-type water heaters connected upstream of the water heater. It was something.

(d) Means for Solving the Problems In the present invention, a water heater connected downstream of the water heater is provided with a flow rate regulating valve controlled by a control device, and the capacity value of the water heater is input to the control device. Connect the operation panel,
It is an object of the present invention to provide a water heater configured to control the flow rate regulating valve according to the capacity of the water heater.

(e) Functions and Effects In the present invention, if the capacity of the water heater connected upstream of the water heater is input from the operation panel to the control device, the amount of hot water output from the water heater exceeds the capacity of the water heater. When the hot water temperature is about to drop, the flow control valve is throttled to limit the amount of hot water, thereby preventing the hot water temperature from dropping.

Further, since the control device and the flow rate regulating valve are provided in the water heater, such a device is not required on the water heater side, and the structure is simplified.

Furthermore, all the devices to prevent the hot water temperature from dropping are installed on the water heater side, so no matter what type of water heater is connected upstream of the water heater, such as gas type, electric heating type, oil type, etc. , it is possible to limit the amount of hot water discharged to prevent a drop in the temperature of the hot water discharged.

(F) Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the conceptual configuration of a hot water mixing device (A) as an example of a hot water supply device. (1) is the water heater, (2) is the hot water side piping, (
3) is the water side piping connected to the water supply, (ν) is the hot water side piping (2)
) and the water side pipe (3).

A hot water temperature sensor (5) is provided in the mixing flow path (4) on the downstream side of the hot water mixing faucet (V), and the hot water temperature sensor (5) detects the hot water temperature and controls the control device (C) described below. The hot water mixing faucet (V) is feedback-controlled to dispense mixed hot water at a set temperature.

In addition, a flow rate adjustment valve (6) is provided at the end of the mixing flow path (4) to control the amount of hot water coming out from the hot water mixing faucet (V),
The hot water outlet is a shower, wash basin, etc. (7), or a bathtub (8)
It is possible to switch to either one.

In addition, a water temperature sensor (9) is installed on the water side piping (3), and a mixing flow path (
4) is provided with a flow rate sensor (10), and each detected value is input to the control device (C).

As shown in Fig. 2, the hot water mixing faucet (V) has a valve body (13), which is the operating part, rotatably inserted into the valve box (14), and is connected to the temperature control motor ( 16).

There are movable valve holes (1) on the water side and hot water side on the outer wall of valve # (13).
7) (18) is opened, and fixed valve holes (19) and (20) on the water side and hot water side are opened on the inner wall surface of the valve box (14), and the detected value of the hot water temperature sensor (5) is Based on this, the temperature control motor (16) is controlled by the control device (C) to rotate the valve body (13), adjust the opening degrees of the valve holes on the water side and the hot water side, and control the mixing ratio of hot water and hot water. , and is configured to discharge mixed hot water at a set temperature.

The flow rate adjustment valve (6) has a movable valve hole (32) opened in the outer wall of a cylinder-shaped valve body (31), and also has a movable valve hole (32) opened in the outer wall of the valve body (33), which communicates with the shower etc. and the bathtub, respectively. The fixed valve holes (34) and (35) are open, and the switching motor (36
) to rotate the valve body (31) to switch the outlet.

In addition, a movable valve hole (
32) and the fixed valve holes (34) and (35) do not match, creating a neutral range where no water flows downstream.
The opening degree of the fixed valve holes (34) and (35) increases as the movable valve hole (32) is rotated from the neutral range to the left and right, and the switching motor (36) controls the opening of the valve hole. By adjusting the temperature, the flow rate of hot water discharged from the hot water mixing faucet (v) can be controlled.

As shown in FIG. 3, the control device (C) includes a microprocessor (20) and input/output interfaces (21) (22).
) and a memory (23) that stores a control program, and the input interface (21) includes the hot water temperature, water temperature, and flow rate sensors (5), (9), and (10).
The temperature control motor (16) and the switching motor (36) are connected to the output interface (22). As shown in Figure 4, the hot water temperature setting device (24), hot water tap button (25), hot water tap stop button (26), shower (7)
) and the bathtub (8), enter the switch button (27) to switch the amount of hot water output, and the model (gas type, electric heating type, etc.) of the water heater (1) connected to the upstream side of the hot water mixing device (^). A capotan (28) with a model number is provided to input the heat source capacity (29) of the water heater (1) as a heat source (No. 12 to No. 32, etc.).

Then, the hot water temperature sensor (5) detects the hot water outlet temperature, and the temperature control motor (1
6) to perform feedback control of the hot water temperature.

In particular, the control device (C) performs not only the above-mentioned hot water temperature control, which is the original control of the hot water mixer tap (V), but also the control device that prevents a drop in the hot water temperature that occurs due to hot water being drawn out beyond the capacity of the hot water heater (1). It is carried out.

That is, a hot water output control routine based on an algorithm derived from the formula is stored in the memory (23) of the control device (C), and the water temperature sensor (9) installed in the water side pipe (3) and the mixed flow control routine are stored in the memory (23) of the control device (C). The flow rate sensor (10
) is input to the control device (C), and the control panel (
11) type capotan (28) and capacity capotan (2)
9), calculate the maximum amount of hot water at the set temperature at that time, and measure the amount of hot water using the flow rate sensor (10) installed in the mixing flow path (4). feedback control of the amount of hot water is performed using the maximum amount of hot water as a target value, and if the amount of hot water at the set temperature exceeds the capacity of the water heater (1), the flow rate adjustment valve (6)
By reducing the amount of hot water that comes out of the water heater (1) by throttling the water heater (1), the amount of hot water that comes out exceeds the capacity of the water heater (1) and the temperature of the hot water that comes out is prevented from decreasing.

In addition, when the hot water temperature is set to a high temperature during winter, the water temperature sensor (9) installed in the water side pipe (3) may not be able to accurately detect the water temperature due to accumulated water in the water side pipe (3). Although this may not be possible, if you configure the control routine to flow a very small amount of water into the water side piping (3) for a short period of time at the same time as hot water is tapped, the accumulated water in the water side piping (3) will flow out and the water will be accurately measured. can detect the water temperature.

In addition, it is possible to input seasons such as spring, summer, fall, and winter on the operation panel (11), and the average water temperature for that season can be input to the control device (11).
C) and replace it with the detected value of the water temperature sensor (9).

As mentioned above, an operation panel that can input the water heater model and capacity into the control device is connected to the control device of the water heater connected downstream of the water heater, and the flow rate is adjusted according to the water heater model and capacity. By configuring it to control the regulating valve (6), there is no need to provide the water heater with a valve to limit the amount of hot water output or a control device for this purpose, simplifying the structure. By allowing input of the type and capacity, it is possible to prevent the temperature of the hot water from decreasing due to the capacity of the water heater being exceeded, no matter what type of water heater is connected upstream of the water heater.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the conceptual configuration of a hot water supply device, FIG. 2 is a cross-sectional explanatory diagram of a hot water mixing faucet, FIG. 3 is a block diagram showing the configuration of a control device, and FIG. 4 is a front view of an operation panel. (A): Hot water mixing device (C) Second control device (1): Water heater (6): Flow rate adjustment valve (11): Operation panel

Claims (1)

[Claims] 1) A water heater connected to the downstream side of the water heater (1) is provided with a flow rate regulating valve (6) controlled by a controller (C), and the controller (C) is connected to the water heater (1). A water heater connected to an operation panel (11) for inputting a capacity value, and configured to control the flow rate regulating valve (6) according to the capacity of the water heater (1).