JPH07239150A - Water heater - Google Patents

Abstract

PURPOSE:To obtain a water heater enabling exact supply of hot water from two or more hot-water connection ports which emable selection and setting of different hot-water temperatures according to purposes of use. CONSTITUTION:In the main body of a water heater, a high-temperatureside hot-water connection port 17 and a separate variable-side hot-water connection port 16 and taking out a mixture of water and hot water from the middle of a supply water piping 18 for a heat exchanger 4 and of a hot supply water piping 19 taking out the hot water heated by the heat exchanger 4 are provided, and a mixing valve 14 so designed as to enable regulation of the quantities of mixed water and hot water is provided at a joining part of a branch piping and a mixture piping. A variable-side hot supply water temperature detector 15 is provided in the middle of the mixture piping, while a variable-side hot supply water temperature setting unit 15 is provided in an operating panel, and the opening of the mixing valve 14 and, at the same time, a main burner 10 are controlled by a variable-side hot supply water temperature controller 25 so that a temperature detected by the variable-side hot supply water temperature detector 15 be the temperature of hot water set by the variable-side hot supply water temperature setting unit 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply device in which one hot water supply device has two or more hot water connection ports so that hot water of different temperatures can be discharged from each hot water connection port. is there.

[0002]

2. Description of the Related Art A conventional water heater installed in a kitchen or a kitchen is a hot water connection port for discharging hot water heated by the heat exchanger to one water supply connection port for the heat exchanger. One is also the most prevalent. And the kitchen and bathroom,
When hot water is supplied to two or more systems such as in a washroom, another pipe is branched and connected to the hot water connection port of the water heater for branch hot water supply. In this case, the hot water supply device itself has only one hot water connection port, and the pipes branching from the hot water supply port have different installation conditions for individual users. Further, the conventional hot water supply device is configured to be able to freely change the hot water outlet temperature, but the method of changing the hot water outlet temperature is to change the amount of water supplied to the heat exchanger,
Alternatively, it is a system in which the supply amount of fuel (for example, gas) supplied to the heat exchanger is changed, or both of them are changed. With this method, the temperature of the hot water discharged from the hot water connection port is almost the same even if two or more systems are provided.

[0003]

When hot water is used, not all hot water systems, terminal faucets, etc. are used at the same temperature depending on the purpose of use. In particular, the tendency is becoming stronger due to changes in lifestyle and the like. For example, recently, dishwashers are used for commercial purposes such as restaurants, and are becoming popular in general households as well. For example, hot water of 90 ° C is used for dishwashers, and in other cases in kitchens and kitchens. Hot water at a lower temperature than that is used for usual washing of dishes, foods, etc., which are often required at the same time.

In such a case, conventionally, the hot water supply temperature of the water heater is set to a high temperature side, and when a low temperature is required, the hot water is received in a container such as a ball and the water is supplied from a tap. The method of adding water and making it low temperature is used.

However, this method is not only troublesome, but also the hot water temperature cannot be accurately adjusted on the low temperature side, which is apt to cause waste of hot water and water, and from the viewpoint of saving water resources. , Not preferable. In addition, separately from the water heater
It is also practiced to use a commercially available mixing valve to branch the low-temperature hot water from the hot water connection port of the hot water supply device to release hot water, but in this case, in addition to the hot water supply device, request a construction company to supply hot water. Branch work for the piping and the water supply pipe was separately required, and the operation of the mixing valve was troublesome because the user had to adjust the tap water temperature manually each time.

The present invention has been proposed in view of these problems, and an object thereof is to have two or more hot water connection ports capable of accurately selecting and setting different hot water temperatures for different purposes. An object of the present invention is to provide a water heater capable of discharging hot water having different temperatures from each other.

[0007]

In order to achieve the above object, the present invention provides hot water after supplying water from a water supply pipe to a heat exchanger, detecting the temperature and amount of the supplied water, and heating the heat exchanger. In a water heater in which the main burner of the heat exchanger is controlled by the burner controller so that the temperature reaches the preset hot water temperature, and the hot water is taken out directly from the hot water supply pipe in the main body of the water heater. Separately from the connection port, the water supply pipe to the heat exchanger and the hot water heated by the heat exchanger are taken out from the middle of the hot water supply pipe through the branch pipe and the mixing pipe, respectively, and the mixed water of water and hot water is taken out. Provide a variable side hot water connection port, at the confluence of the branch pipe and the mixing pipe,
A mixing valve that can adjust the mixing amount of water and hot water is installed, a variable-side hot water temperature detector is installed in the middle of the mixing pipe, and a variable-side hot water temperature setting device is provided on the operation panel to adjust the variable-side hot water temperature. The variable side outlet temperature controller controls the opening of the mixing valve and at the same time the main burner so that the temperature detected by the detector becomes the hot water temperature set by the variable side outlet temperature setting device.

[0008]

Since the hot water supply apparatus of the present invention has the above-mentioned configuration, if a desired hot water temperature is set in the variable side hot water temperature setting device of the operation panel, the temperature as set is obtained from the variable side hot water connection port. Hot water can be discharged, and high-temperature hot water can be discharged from the high temperature side hot water connection port. Not only can these be used separately, but both can be used at the same time. In that case, the control mode is such that the sum of the amounts of hot water discharged from the variable side hot water connection port and the high temperature side hot water connection port passes through the water supply pipe. It is detected from the amount of water, and at the same time, the hot water temperature after being heated by the heat exchanger and the hot water temperature from the variable side hot water connection port are detected, and the hot water temperature as set by the variable side hot water temperature setting device is detected. The opening degree of the mixing valve and the combustion amount of the main burner of the heat exchanger required to discharge the hot water are controlled by the variable side hot water temperature controller.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall schematic configuration diagram showing an embodiment of a water heater according to the present invention, in which (1) is a water connection port
(2) is a water temperature detector such as a thermistor, (3) is a water amount sensor, (4) is a heat exchanger, (5) is a combustion fan,
(6) is a Sparker, (7) is a gas solenoid valve (original valve),
(8) is a hot water supply valve, (9) is a proportional control valve, (10) is a main burner, (11) is a frame rod, (12) is a hot water outlet temperature detector such as a thermistor, (13) is a hot water branch metal fitting, (13 ') is a water branch fitting, (14) is a mixing valve, (15) is a variable side hot water temperature detector such as a thermistor, (16) is a variable hot water connection port, (17) is a high temperature hot water connection port, (18) is a water supply pipe, (18 ') is a branch water supply pipe, (19) is a hot water supply pipe, (19') is a branch hot water supply pipe,
(20) is a fuel gas supply pipe, (21) is a buffler, (22) is a water heater main body, (23) is a burner controller, (24) is a mixing pipe, and (25) is a variable hot water temperature side controller. Shows.

The water connection port (1) is connected to a water supply source such as a water tap on the one hand, and is connected to the inlet side of the heat exchanger (4) via a water supply pipe (18) on the other hand. The water temperature detector (2) and the water amount sensor (3) are connected to the water supply pipe (18).
Is installed on the way to the burner controller (23) and sends necessary control signals to the burner controller (23).

The heat exchanger (4) is installed in the upper part of the body (22) of the water heater, and the hot water supply pipe (19) is connected to the outlet side thereof. A main burner (10) is installed in the lower part of the heat exchanger (4) in the main body (22) of the water heater, and the sparkler (6) and the frame rod (11) are arranged corresponding to the main burner (10). Further, a combustion fan (5) is installed below the main burner (10). In the main burner (10),
A gas supply pipe (20) is connected, and this gas supply pipe (20) is connected to an appropriate gas supply source. And
In the middle of the gas supply pipe (20), a gas solenoid valve (7),
A hot water supply valve (8) and a proportional control valve (9) are connected.

The gas solenoid valve (7) and the hot water supply valve (8) detect by the water quantity sensor (3) whether or not water is being supplied from the water supply pipe (18), and the burner controller (23).
ON-OFF opening / closing control is performed through. Further, the proportional control valve (9) detects the temperature and amount of water supplied to the inlet of the heat exchanger (4) by the water temperature detector (2) and the water amount sensor (3), and heat The outlet temperature of the exchanger (4) is detected by the hot water outlet temperature detector (12),
Based on these data, the burner controller (23) proportionally controls the combustion amount based on the current water temperature and water amount so that the outlet temperature of the heat exchanger (4) becomes a constant high temperature.

The hot water outlet temperature detector (12) is installed at an appropriate position in the hot water supply pipe (19) connected to the outlet of the heat exchanger (4), and the burner controller (23) has a heat exchanger ( The hot water outlet temperature from 4), that is, the hot water outlet temperature is converted into an electric signal, which is detected and sent.

The hot water branch fitting (13) is a hot water supply pipe (19).
Installed near the terminal of the hot water supply pipe, the hot water sent from the hot water supply pipe (19) is branched to the mixing valve (14) and the high temperature side hot water connection port (17) through the hot water supply pipes (19 ') (19 "). Connected.

The water branch fitting (13 ') is installed in the middle of the water supply pipe (18) from the installation position of the water temperature detector (2) to the inlet of the heat exchanger (4), and the water supply pipe (18)
Branch water to the mixing valve (14)
8 ') so that they can be branched and fed.

The variable side hot water connection port (16) is connected to the mixing valve (14) through a mixing pipe (24). In the middle of this mixing pipe (24), a variable-side hot water temperature detector (15) that converts the hot water discharged from the variable-side hot water connection port (16) into an electric signal and detects it, and sends it to the burner controller (23). Is installed.

The mixing valve (14) has, for example, two inlets (14a) (14) as shown in FIG.
b) and one outlet (14c) are branched in three directions, and are composed of a valve body (14d) and a mixing amount adjusting valve body (14e) rotatably installed in the valve body (14d). The configuration is used. In this case, the mixing amount adjusting valve element (14e) has two inlet passages (14f) (14).
g) and one outlet passage (14h) are formed in a substantially Y shape, and for the two inlets (14a) (14b),
The opening degree of the two inlet passages (14f) (14g) can be changed and adjusted in inverse proportion. Then, the mixing amount adjusting valve body (14e) is automatically inversely proportional to the opening degree of the two inlet sides by the actuator (14j) such as a servo motor via the variable side outlet hot water temperature controller (25). The mixed amount of water and hot water is adjusted so that the variable side hot water temperature is adjusted and set in advance. The variable side hot water temperature is set by the operation panel (2) of the variable side hot water temperature controller (25).
5a) provided on the variable side tap water temperature setting device (25b).

FIG. 3 shows a variable side tap water temperature controller (2
5) The operation panel (25a) of 5) is illustrated. The operation panel (25a) includes, for example, a variable side outlet hot water temperature setting device (25b) and a hot water supply device that can freely set the hot water temperature in the range of 35 ° C to 50 ° C. The main switch (25c) of the machine is installed. In this case, the set hot water temperature may be digitally displayed if necessary. In addition, with respect to the hot water temperature set by the variable hot water temperature setting device (25b), the hot water temperature discharged from the variable hot water connection port (16) is detected by the variable hot water temperature detector (15), and The microcomputer of the tap water temperature controller (25) calculates the adjustment opening required for the mixing valve (14), and based on the calculation result, the actuator (14j) causes the mixing amount adjustment valve body of the mixing valve (14). (1
4e) is automatically adjusted. In this case, the opening of the proportional control valve (9) is adjusted at the same time as the mixing amount of the mixing valve (14) is adjusted.

FIG. 4 is a block diagram showing an example of the control circuit of the hot water supply apparatus of the present invention. The variable side hot water temperature setting device (which is installed on the operation panel (25a) of the variable side hot water temperature controller (25) ( 25b) and the main switch of the water heater (2
5c), the variable side outlet hot water temperature controller (25) and the burner controller (23) are set to start and end the use of the water heater and set the variable side outlet hot water temperature. The burner controller (23) and the variable side outlet hot water temperature controller (25) include a water temperature detector (2), a water amount sensor (3), a high temperature side outlet hot water temperature detector (12), and a variable side outlet hot water temperature detector (15). ) And the electric signal from the frame rod (11) are input, and the combustion fan (5), the sparker (6), the gas solenoid valve (7), by the calculation and control function of the microcomputer based on these input data. Hot water supply valve (8), proportional control valve (9) and mixing valve (1
4) is configured to output a control signal.

The configuration of the embodiment of the water heater according to the present invention is as described above. Next, an example of the operation will be described.

Turn on the main switch (25c) of the water heater
In addition, the variable-side hot water temperature setting device (25b) has set the variable-side hot water temperature, and in this state, hot water is discharged from one or both of the variable-side and high-temperature-side hot water connection ports (16) (17). The water entering temperature of the water entering from the water connection port (1) is detected and measured by the water temperature detector (2). After that, the water passes through the water amount sensor (3), and the water amount is detected and measured. Next, as it enters the heat exchanger (4), the signal from the water amount sensor (3) is received, the combustion fan (5) rotates, the sparker (6) operates, and the gas solenoid valve (7), The hot water supply valve (8) and the proportional control valve (9) are opened, and the main burner (1
0) is ignited, and combustion is continued after ignition is detected by the flame rod (11).

The water heated by the heat exchanger (4) becomes constant high temperature water, passes through the high temperature side tap water temperature detector (12), and reaches the hot water branch metal fitting (13). The burner controller (23) controls the proportional control valve (9) so that the temperature of the hot water coming out here becomes a preset hot water temperature (for example, 90 ° C.), and immediately after the hot water is set, Be warm. When the hot water reaching the hot water branch fitting (13) is opened at the end of the variable side hot water connection port (16),
From the branch hot water supply pipe (19 ') to the mixing valve (14)
To the variable side hot water connection port (16) via the mixing pipe (24) together with the water branched and supplied from the branch water supply pipe (18 '). At this time, the hot water temperature passing through the mixing pipe (24) is controlled by the variable side hot water temperature detector (15).
Is detected by the variable side hot water temperature controller (25) and compared with the variable side set temperature in the variable side hot water temperature controller (25), and the variable side hot water temperature controller (25) adjusts the opening of the mixing valve (14) so as to be equal to the set temperature. To do. In this case, at the same time, the required gas amount is calculated in the burner controller (23), and the opening degree of the proportional control valve (9) is adjusted based on the calculation. As a result, the temperature of the hot water discharged from the variable side hot water connection port (16) is set to the hot water temperature set by the variable side hot water temperature setting device (25b).

On the other hand, high temperature hot water heated by the heat exchanger (4) is directly supplied to the high temperature side hot water connection port (17) through the hot water supply pipe (19) and the branch hot water supply pipe (19 "). As described above, the hot water temperature here is the fixed hot water temperature (for example, 90 ° C.).

In the above embodiment, only one variable side hot water connection port (16) is installed, but the water supply pipe (18)
A plurality of variable side hot water temperature setters (25b) are provided on the operation panel (25a) in correspondence with each variable side hot water connection port (16) by arranging a plurality of similar configurations between the hot water supply pipe and the hot water supply pipe (19). A plurality of hot water temperatures may be set separately. As another example, the variable side hot water connection port (1
6) The mixing pipe (2) that came out of the mixing valve (14).
It is also possible to connect a plurality of branches to 4).

The embodiment of the present invention is as follows.

A plurality of mixing valves (14) are provided between the water supply pipe (18) and the hot water supply pipe (19) via branch pipes, and each mixing valve (14)
At the outlet of the variable side hot water connection port (1
6) is connected, and the variable side tap water temperature detector (15) is installed in each mixing pipe (24), and each variable side hot water connection port (1)
Corresponding to 6), a plurality of variable side tap water temperature setting devices (25b) are arranged on the operation panel (25a), and the hot water temperature is set separately for each of them. Water heater.

The water heater according to claim 1, wherein a plurality of variable side hot water connection ports (16) are branched and connected to a mixing pipe (24) coming out of the mixing valve (14).

According to the above embodiment, hot water having different temperatures can be discharged to two or more systems.

Further, according to the above embodiment, the variable side hot water can be used at a plurality of places.

[0030]

According to the present invention, it has two or more hot water connection ports capable of accurately selecting and setting different hot water temperatures for different purposes.
It is possible to provide a water heater capable of discharging hot water having different temperatures from each of them.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration explanatory view showing an embodiment of a water heater according to the present invention.

2A and 2B are cross-sectional explanatory views showing an example of a state in which the amount of hot water-water mixture of a mixing valve is adjusted.

FIG. 3 is an explanatory view showing an example of an operation panel equipped in the variable side outlet hot water temperature controller according to the present invention.

FIG. 4 is a block diagram showing an example of a control circuit of the water heater according to the present invention.

[Explanation of symbols]

 1 Water Connection Port 2 Water Temperature Detector 3 Water Volume Sensor 4 Heat Exchanger 10 Main Burner 14 Mixing Valve 12 High Temperature Side Hot Water Temperature Detector 15 Variable Side Hot Water Temperature Detector 16 Variable Side Hot Water Connection Port 17 High Temperature Hot Water Connection Port 18 Water Supply Pipe 18 'Branch water supply pipe 19 Hot water supply pipe 19' Branch water supply pipe 20 Gas supply pipe 22 Main body of water heater 23 Burner controller 24 Mixing pipe 25 Variable side hot water temperature controller

Claims (1)

[Claims] 1. The water is supplied from a water supply pipe to a heat exchanger, and the temperature of the supplied water is detected so that the temperature of the water after heating by the heat exchanger is adjusted to a preset temperature. In a water heater in which the main burner of the exchanger is controlled by the burner controller so that it can be taken out from the hot water supply pipe, in the main body of the water heater, there is a high temperature side hot water connection port that is taken directly from the hot water supply pipe, and separately from this, to the heat exchanger. The hot water supply pipe and the hot water taken out by the heat exchanger are provided with variable side hot water connection ports for taking out the mixed water of water and hot water from the middle of the hot water supply pipe through the branch pipe and the mixing pipe, respectively, and mixing with the branch pipe. A mixing valve that can adjust the mixing amount of water and hot water is installed at the confluence with the pipe, and a variable-side hot water temperature detector is installed in the middle of the mixing pipe. Is equipped with a variable side outlet temperature detection The hot water supply is characterized in that the variable side hot water temperature controller controls the opening of the mixing valve and the main burner at the same time so that the detected temperature of the hot water heater becomes the hot water temperature set by the variable hot water temperature setting device. Machine.