JPH03158649A - Hot water supplying device and controlling method for its hot water level - Google Patents

Abstract

PURPOSE:To adjust a hot water level of a bathtub to a set value by allowing a controller to take up detection signals from a flow sensor of a heat exchanger and a water level sensor of the bathtub and transmissing a device control signal corresponding to both the detection signals to a water control valve. CONSTITUTION:When hot water from a heat exchanger 2 is injected into a bathtub B, a hot water level is detected by a water level sensor 11 of a hot water circulation passage 10 connected to the bathtub B and, when the detection signal is transmitted to a controller 12, the controller 12 judges to compared the detection signal with a value near preset hot water level in the bathtub B, transmitting the signal on the basis of the judgement to a water control valve 7 to perform flow control of the hot water from the heat exchanger 2. Next, when a water flow allowed to flow in the heat exchanger 2 is detected and the detection signal is transmitted to the controller 12, the controller 12 transmits a drive control signal to the water control valve 7 on the basis of the detection signal and another detection signal related to the hot water level, performing hot water injection control of the hot water for the bathtub B. The hot water level of the bathtub B is adjusted to a preset value.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a water heater that detects the flow rate and hot water level of hot water poured into a bathtub and adjusts the hot water level in the bathtub, and a hot water level control thereof. It is about the method.

(Prior Art) A conventional hot water supply device for a bathtub consists of a heat exchanger for hot water supply, a hopper that absorbs the volumetric expansion of hot water and also pressurizes and replenishes a hot water circulation circuit, and a hot water supply device that heats the hot water from the hopper. A device is known which consists essentially of a heat exchanger for heating a bath.

(Problem to be Solved by the Invention) In this case, the hot water level in the bathtub is detected by a water level sensor, etc., but the pressure at the time of pouring depends on the amount of hot water poured into the bathtub. It has been pointed out that there is an inconvenience that the hot water level in the bathtub does not reach the set value because the water level sensor cannot accurately detect the water level due to this influence.

The present invention has been made in view of such disadvantages.

(Set steps for solving the problem) In order to solve the above problem, the present invention includes a sensor for detecting the amount of water flowing through the heat exchanger, and a sensor for detecting the water level of the hot water poured into the bathtub. A water level sensor for detection and a water control valve for controlling the flow rate of hot water from the heat exchanger are provided in a hot water supply circuit for pouring hot water into the bathtub, and a controller is provided for taking in detection signals from the water level sensor and the flow rate sensor, The controller sends drive control signals corresponding to detection signals from the water level sensor and the flow rate sensor to the water control valve.

Furthermore, when pouring hot water from a heat exchanger into a bathtub, the method according to the present invention detects the hot water level in the bathtub and compares it with a preset value close to the hot water level in the bathtub. The flow rate of hot water from the heat exchanger is controlled using a signal based on this comparative judgment, and then a detection signal related to the amount of water flowing through the heat exchanger and a detection signal related to the hot water level in the bathtub are determined. Based on the detection signal, hot water is controlled to be poured into the bathtub, and the hot water level in the bathtub is adjusted to a preset value.

(Function) When hot water from the heat exchanger is poured into the bathtub, the hot water level is first detected by the water level sensor in the hot water circulation path leading to the bathtub, and this detection signal is sent to the controller, which The detection signal is compared with a preset value close to the hot water level in the bathtub, and a signal based on this comparison is sent to the 0;I water distribution control valve to control the flow rate of hot water from the heat exchanger. Take control. Next, the amount of water flowing through the heat exchanger is detected, and a detection signal indicating the amount of water flowing is sent to the controller, and the controller, based on the detection signal and the detection signal related to the hot water level, A drive control signal is sent to the water control valve, hot water is controlled to be poured into the bathtub, and the hot water level in the bathtub is adjusted to a preset value.

(Example) Next, a water heater and a hot water level control method thereof according to the present invention will be described below by giving one example and referring to the attached drawings.

In FIG. 1, reference numeral 1 indicates a water heater, and this water heater 1 includes a heat exchanger 2 and a bath heat exchanger 3, and absorbs the volumetric expansion of hot water, as well as pressurizes and replenishes the hot water circulation circuit. It has a hopper 4 that performs this.

A water pipe 6 is connected to the heat exchanger 2 via a flow rate sensor 5 that detects the amount of water flowing through the heat exchanger 2, and further, the heat exchanger 2 detects the amount of hot water flowing through the heat exchanger 2. It is connected to the hopper 4 via a water control valve 7 and a two-way valve 8 that control the water. Further, a hot water supply pipe 9 for supplying hot water from the heat exchanger 2 is provided outside the water control valve 7 as well.

The hopper 4 is connected to the bath heat exchanger 3 via a hot water circulation path 10 for reheating the bathtub, which will be described later.

A water level sensor 11 is provided in the hot water circulation path 10 for reheating to detect the level of hot water being poured. A bathtub B is connected via the hot water circulation path 10 for hot water heating.

The hot water supply device 1 includes a system that sends a drive control signal to the components that make up the hot water supply device 1, and the water level sensor 11.
A controller 12 that takes in a detection signal from the flow rate sensor 5 is also provided. This controller 12 is connected to a starting operation device (not shown). the controller 12
corresponds to the detection signals from the water level sensor 11 and the flow rate sensor 5, and sends a drive control signal, that is, a command signal for opening, restricting, or blocking the hot water flow path, to the water control valve 9.

The water heater l according to the present invention is constructed as described above, and its operation will be explained first.

By operating a starting operation device (not shown) connected to the controller 12, the hot water supply device 1 is operated, and water is supplied to the heat exchanger 2 via the water pipe 6. The heated water is supplied to the hopper 4 via the water control valve 7 and the two-way valve 8 by the heat exchange action of the heat exchanger 2. In addition, when the hot water from the heat exchanger 2 is supplied to the outside via the hot water supply W9, as shown in FIG. 2, the controller! 2 sends a command signal to the two-way valve 8 to open the flow path, and the two-way valve 8 opens the flow path (see Fig. 1).
Fig. 2 31' 111). Next, Oii hopper 4
The hot water stored in the bath is supplied to the bath heat exchanger 3 via the hot water circulation path 10 for reheating. Then, the hot water heated by the heat exchange action in the bath heat exchanger 3 is heated in the bathtub [
3 (SrF2).

In this case, the water level sensor installed in the hot water loop lO for the hot water! The hot water level is detected by the controller 1, and this detection signal is supplied to the controller 12. The maximum flow rate of hot water poured into the bathtub 13 is 22Q/111n.

The controller 12 compares the detection signal from the water level sensor 11 with the set water level of the bathtub B and makes a judgment (SrF
3), that is, 15III to the set water level of bathtub B.
A determination is made as to whether the value is within the range. 1 to set water level
If the water level has not reached 5M, check the water level sensor II again.
The hot water level detection signal is captured from the

When the set water level is within 15 mm, the controller 12 sends a command signal to the water control valve 7 to restrict the hot water flow path in order to throttle the amount of hot water in the heat exchanger 2. Here, the flow rate sensor 5 detects the amount of water flowing through the heat exchanger 2, and sends a detection signal related to this amount of water to the controller 12. The controller 12 determines whether the flow rate supplied to the heat exchanger 2 is 15Q/sin or more based on the detection signal indicating the water flow rate (SrF4). If the flow rate is 15Q/min or more, the controller 12 sends a control signal to the water control valve 7 to limit the flow path of the water control valve 7, and the flow rate is 15Q/ll1.
If it is less than in, it is determined whether the water level of bathtub B is higher than the set water level.

When a control signal to restrict the flow path of the water control valve 7 is sent and the water control valve 7 is turned ON in the closing direction (SrF5), the controller 12 controls the heat exchanger based on the detection signal from the flow rate sensor 5. It is determined whether the flow rate supplied to SrF2 is 15Q/min (SrF6). Flow rate is +5Q/w
If it is in, a control signal to be turned off is sent to the water control valve 7, and if the flow rate is not 15Q/win, it returns to 5TP5. When the water control valve 10 is turned off (SrF7),
The controller 12 determines whether the water level in the bathtub B is equal to or higher than the set water level (SrF8). If the water level is above the set water level, the controller 12 sends a signal to the two-way valve 8 to close the flow path, thereby completing the pouring. On the other hand, if the water level is less than the set water level, it returns to 5TP3. As described above, the water control valve 7 is driven and controlled based on the detection signal regarding the hot water level and the water flow rate, and the hot water level in the bathtub B is adjusted.

After pouring hot water into bathtub B is completed, hot water supply device 1 enters reheating operation.

In the present invention, an embodiment is shown and it is determined whether or not the preset hot water level has reached approximately 15III11, but if the value is close to the preset hot water level, other It may be a value. Further, it is applicable to water heaters having various hot water supply capacities.

(Effects of the Invention) As described above, according to the present invention, when hot water is poured into the bathtub, the water level sensor detects the hot water level in the bathtub, and uses the detection signal and a preset value close to the hot water level in the bathtub. The water control valve is adjusted to control the amount of hot water poured into the bathtub when the hot water level in the bathtub approaches the set hot water level. The flow path is driven in a limited manner, and then the flow rate sensor detects the amount of water flowing through the heat exchanger, and a drive control signal is generated based on a detection signal related to this amount of water flow and a detection signal related to the hot water level. The hot water is sent to the water control valve to control pouring of hot water into the bathtub, and the hot water level in the bathtub is adjusted to a preset value. For this reason, the amount of hot water poured into the bathtub is controlled based on the amount of water flowing through the heat exchanger and the detection signal related to the hot water level in the bathtub. , the water level sensor is not affected and the hot water level in the bathtub remains stable at the set value.

[Brief explanation of the drawing]

FIG. 1a is a system diagram showing one embodiment of the water heating device according to the present invention; FIG. 1 is a block explanatory diagram of a controller for controlling the hot water level in the water heating device shown in FIG. FIG. 2 is a flowchart showing the operation of the controller shown in FIG. DESCRIPTION OF SYMBOLS 1... Water heater, 2... Heat exchanger, 3... Bath heat exchanger, 4... Hopper, 5... Flow rate sensor, 6...
...Water pipe, 7...Water control valve, 8...Two-way valve, 9...
...Hot water pipe, IO...Hot water circulation path for hot heating, 11...Water level sensor, 12...Controller, B...Bathtub

Claims (2)

[Claims] (1) A flow rate sensor that detects the amount of water flowing through the heat exchanger, a water level sensor that detects the level of hot water poured into the bathtub, and a water control valve that controls the flow rate of hot water from the heat exchanger. is provided in a hot water supply circuit that pours hot water into the bathtub, and also includes a controller that takes in detection signals from the water level sensor and the flow rate sensor, and the controller sends drive control signals corresponding to the detection signals from the water level sensor and the flow rate sensor to the water supply circuit. A hot water supply device characterized in that water is sent to a water control valve. (2) When pouring hot water from a heat exchanger into a bathtub, the hot water level in the bathtub is detected and compared with a preset value close to the hot water level in the bathtub, and this comparative judgment is made. Control the flow rate of hot water from the heat exchanger based on a signal based on the flow rate of hot water from the heat exchanger, and then based on a detection signal related to the amount of water flowing through the heat exchanger and a detection signal related to the hot water level in the bathtub, A method for controlling a hot water level, characterized in that the hot water level in the bathtub is adjusted to a preset value by controlling the pouring of hot water into the bathtub.