JPH0758140B2 - Method of judging circulation of bath water in bath hook device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulation determination method for determining whether or not bath water can circulate to a bath in a bath device capable of dropping hot water into a bath.

[0002]

2. Description of the Related Art By circulating bath water through a circulation path to a bath kettle, it is possible to reheat the bath water, and hot water is dropped into the bathtub through the circulation path of the bath kettle. Conventionally, a bathtub device capable of performing the above is provided. In such a bath pot device, in order to circulate the bath water in the bath pot for additional heating, it is necessary to confirm that the bath water is circulated to the bath pot by the circulation pump drive before that. In other words, it is necessary to make sure that the water level in the bathtub is sufficient to circulate the water to the bath kettle. That is, it is necessary to determine the circulation. This circulation determination is performed by driving the circulation pump after dropping and detecting whether or not the bath water circulates in the circulation path by the water flow switch provided in the circulation path.
Conventionally, as a method for determining the circulation, the circulation pump is driven for a certain fixed time after dropping, and the circulation is determined by the water flow switch.

[0003]

However, in the above-described conventional determination method, the circulation flow rate is determined by the circulation pump drive for a certain period of time regardless of the size of the flow rate of the drop flow rate per unit time. In the case of a small amount, there is a drawback in that the water may not circulate sufficiently in the circulation path even though the water level (amount of water) is sufficient to circulate in the bathtub, and it may be determined that there is no water in the ring circulation determination. If the circulation determination time is increased to cover the case where the drop flow rate per unit time is small, the circulation determination wastes time even if the determination can be made in a short time, and the next operation does not proceed promptly. there were.

Therefore, an object of the present invention is to solve the above-mentioned conventional drawbacks and to provide a bath water circulation determination method in a bath hook device capable of performing a reliable and smooth circulation determination according to the size of the drop flow rate.

[0005]

In order to achieve the above object, the bath water circulation determination method of the present invention is to reheat the bath water by circulating the bath water through the circulation path to the bath kettle. A method of determining bath water circulation in a bathtub device that enables hot water to be dropped into the bathtub via the circulation path of the bathtub. The drive time of the circulation pump for circulation determination is changed depending on the size.

[0006]

[Function] Since the driving time of the circulation pump for circulation determination is changed depending on the size of the drop flow rate per unit time, when the drop flow rate is large, the circulation pump is driven for a short time to circulate quickly. When it is possible to make a determination, and when the drop flow rate is small, the circulation determination can be reliably made by extending the circulation pump drive time for the circulation determination.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. FIG. 1 is an overall configuration diagram of a bathtub device in which the method of the present invention is implemented, and FIG. 2 is a flowchart showing an example of the method of the present invention.

Reference numeral 10 is a bathtub, and 20 is a bath kettle. A circulation passage 30 is connected from the bathtub 10 to the heat exchanger 21 for reheating the bath kettle, and the circulation passage 30 is provided with a circulation pump 22 and a water flow switch 23. 24 is a heat exchanger for hot water supply, in which hot water heated by the heat exchanger 24 is sent to the circulation path 30 through a drop path 25 and a three-way valve 26. A water drop sensor 27 and a drop valve 28 are provided in the drop path 25. 29 is a bypass with a check valve. In addition, the bath controller has a controller with a built-in microcomputer.
Is provided, and the remote controller 50 is electrically connected to the controller 40.

When a reheating command is issued by the remote controller 50, the three-way valve 26 is switched to the circulation path 30 side via the controller 40, and the circulation pump 22 is driven. When the water flow switch 23 detects the minimum amount of working water, the controller 40
The reheating burner (not shown) is burned via the heat exchanger, the reheating heat exchanger 21 is heated, and the circulating water passing therethrough is heated. On the other hand, when an automatic drop command is issued by the remote controller 50, the three-way valve 26 is switched to the drop path 25 side through the controller, the drop valve 28 is opened, and hot water circulates from the three-way valve 26 through the drop path 25. After passing through the passage 30 and the bypass 29, it is dropped into the bathtub 10 from both passages of the circulation passage 30. When a predetermined amount of drop water is detected by the drop water amount sensor 28, the drop valve 28 is closed, the three-way valve 26 is switched to the circulation path 30 side, and circulation determination is started.

A method of determining circulation will be described with reference to the flowchart of FIG. Now, when the automatic drop is completed or once finished, the drop valve 28 is closed and the three-way valve 26
Is switched to the circulation path 30 side (step S1), and circulation determination is started. The controller 40 stores a reference drop flow rate F _o per unit time in advance, and two types of time, a long time L and a short time S, are used as the driving time of the circulation pump 22 at the time of circulation determination. Store in advance. When the automatic drop is completed, the controller 40 calculates the drop flow rate F per unit time from the water amount detected by the drop water amount sensor 28 (step S2), and the drop flow rate F and the previously stored reference drop flow rate. Compare with F _o (step S3). The drop flow rate F is the standard drop flow rate F
_In the case of _o or more, the short time S is selected as the drive time of the circulation pump 22, the circulation pump 22 is driven, and the circulation determination is made depending on whether or not the water flow switch 23 is turned on (step S4). . On the other hand, when the drop flow rate F is less than the reference drop flow rate F _{o, the} long time L is selected as the drive time of the circulation pump 22 to drive the circulation pump 22, and the water flow switch 23 is turned on during that time. Whether or not the circulation is determined is determined (step S5).

In the above-mentioned embodiment, the reference drop flow rate F _o can be based on, for example, 15 liters / min. The long time L is, for example, 5
As the minute and the short time S, 1 minute can be adopted.
Of course, the present invention is not limited to the above numerical values. Depending on the capacity of the circulation pump 22 and the length of the circulation path 30, etc.
Appropriate standard drop flow rate F _o, long time L, short time S
Can be determined in advance by experiments or the like. In addition, the reference drop flow rate is set to 2 or more and the drive time of the circulation pump 22 is set to 3 or more so that the pump drive time according to the drop flow rate can be selected. The lower the drop flow rate per unit time, the more the pump 22 is driven. The driving time of the pump 22 may be shortened as the time is increased and the flow rate dropped per unit time is larger.

[0012]

According to the method of judging the circulation of bath water in the bath hook device according to the first aspect of the present invention, the circulation judgment is made according to the size of the drop flow rate per unit time. Since the driving time of the circulation pump of is changed, if the drop flow rate is large,
The circulation pump can be driven for a short time to quickly determine the circulation,
When the drop flow rate is small, the circulation determination can be reliably performed by lengthening the circulation pump drive time for the circulation determination.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a bath hook device in which the method of the present invention is implemented.

FIG. 2 is a flowchart showing an example of the method of the present invention.

[Explanation of symbols]

 10 Bathtub 20 Bath kettle 21 Heat exchanger for reheating 22 Circulation pump 23 Water flow switch 30 Circulation path

Front page continued (72) Inventor Isao Kawami 32, Akashi-cho, Chuo-ku, Kobe-shi, Hyogo In stock company Noritsu (72) Inventor Toshiya Tatsumura 32, Akashi-cho, Chuo-ku, Kobe, Hyogo In stock company Noritsu (72) Inventor Yoji Hatake, 32, Akashi-cho, Chuo-ku, Kobe-shi, Hyogo In stock company Noritsu (72) Inventor, Tadashi Matsubara 32, Akashi-cho, Chuo-ku, Kobe-shi, Hyogo (72) Inventor, Murakami Masayoshi, 32, Akashi-cho, Chuo-ku, Kobe, Hyogo Prefecture

Claims (1)

[Claims] 1. The bath water can be reheated by circulating the bath water to the bath kettle through a circulation path, and hot water is dropped into the bathtub through the circulation path of the bath kettle. A method for determining the circulation of bath water in a bath hook device, which is capable of performing the above, wherein the drive time of the circulation pump for determining the circulation is changed according to the magnitude of the drop flow rate per unit time. A method for determining circulation of bath water in a bath device.