JPH0510584A - Additional burning device - Google Patents

Abstract

PURPOSE:To obtain an additional burning device which does not impart an unpleasant feeling to a person who bathes in a bathtub due to introduction of cold water in a connecting tube of the device to the bathtub, into the bathtub and maintains hot water temperature in the bathtub constant. CONSTITUTION:In order to maintain temperature of hot water in a bathtub 20 constant by additionally burning at each predetermined time, a controller 26 is provided which confirms an operation of a circulation pump 14 and flow of water by a flowing water sensor 15, then immediately ignites a burner 25, compares a detected temperature of a temperature sensor 13 with a set temperature of a temperature setter 22 after a predetermined time is elapsed, and controls the burner 25 and the pump 14. Further, the controller 26 continuously burns the burner 25 if the detected temperature is lower than the set temperature, heats to the set temperature, stops the burner 25 and the pump 14 if the detected temperature is higher than the set temperature, lengthens a time until next additional burning is conducted in response to a difference between the detected temperature and the set temperature to maintain the temperature in the bathtub 20 constant and eliminates introduction of cold water into the bathtub 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reheating device for keeping the temperature of bath water at a constant temperature in a bath such as a home.

[0002]

2. Description of the Related Art In recent years, an increasing number of reheating devices equipped with a control device for keeping the temperature of bath water constant has been disclosed. For example, a reheating device of this type is conventionally disclosed in Japanese Utility Model Laid-Open No. 60-59032. As described above, the operation shown in FIG. 4 was performed with the structure shown in FIG.

That is, a bath circulation pipe 1 is provided with a circulation pump 2 and a temperature detector 3, and the heat exchanger 4 and the bath circulation pipe 1 are connected to a bathtub 6 via a connection pipe 5.
The control device 9 operates the circulation pump 2 to keep the temperature of the hot water in the bathtub 6 constant by performing the reheating operation every predetermined time, and the temperature is detected by the temperature detector 3 after a lapse of a fixed time and the temperature is provided in the bathroom or the like. When the detected temperature is lower than the set temperature, the circulation pump 2 is continuously operated and the burner 8 is ignited to perform the heating operation up to the set temperature.
When the detected temperature is higher than the set temperature, the operation of the circulation pump 2 is stopped, and after a predetermined time, the reheating operation is repeated.

[0004]

However, in the conventional structure and operation as described above, in order to accurately detect the temperature of the hot water in the bathtub 6, the hot water in the bathtub 6 is sufficiently stirred and the temperature detector 3 is used. Time required to reach (usually 20-30 seconds)
Since the heating operation is not started, there is a problem that the cold water in the connection pipe 5 flows into the bathtub 6 and gives a bathing person an unpleasant feeling. In particular, when the reheating device and the bathtub 6 are installed separately from each other, the above problem becomes prominent in the winter season because the connecting pipe 5 is long.

Therefore, an object of the present invention is to prevent cold water in the connecting pipe from flowing into the bathtub as much as possible so as not to cause discomfort to a bathing person.

[0006]

In order to achieve the above-mentioned object, the present invention performs a reheating operation at predetermined time intervals to keep a constant water temperature in a bathtub, and a controller operates a circulation pump to detect flowing water. Immediately after checking the running water with a heater, the burner is ignited, and after a certain period of time, the detected temperature of the temperature detector is compared with the set temperature of the temperature setter installed in the bathroom, etc., and if the detected temperature is lower than the set temperature, When the detected temperature is higher than the set temperature, the burner and circulation pump are stopped, and the next reheating operation is performed according to the difference between the detected temperature and the set temperature. The control is performed to lengthen the time until the execution.

[0007]

With the above-described structure, the present invention minimizes the inflow of cold water in the connecting pipe into the bath by igniting the burner and performing the heating operation immediately after the circulation pump is operated. Then, if the detected temperature and the set temperature are already overheated after a certain period of time, if the heating temperature is already too high, the hot water temperature in the bathtub will be increased by increasing the time until the next reheating operation. The temperature of the hot water in the bathtub can be kept constant without increasing gradually. As a result, the temperature of the hot water in the bathtub can be accurately controlled, and the bathing person can be prevented from feeling uncomfortable.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram showing the structure of an embodiment of the present invention,
FIG. 2 is a flow chart showing the operation of the embodiment of the present invention.

In FIG. 1, reference numeral 11 denotes a bath circulation pipe connected to a heat exchanger 12, which is an exterior body surrounding the temperature detector 13, the circulation pump 14, the flowing water detector 15, and the heat exchanger 12 in this order. A circulation inlet 17 is attached to the temperature detector 13 side, and a circulation outlet 18 is attached to the outlet side of the heat exchanger 12. Reference numeral 19 is a bathroom having a bathtub 20 therein, and a wall surface 21 is provided with a temperature setting device 22. Two
Reference numeral 3 denotes an adapter attached to the bathtub 20 and a circulation inlet 17 and a circulation outlet 18 via two connecting pipes 24, respectively.
It is connected to the. Reference numeral 25 is a burner for heating the heat exchanger 12, and 26 is a circulation pump 14 / burner 2 based on signals from the temperature detector 13, the flowing water detector 15, and the temperature setter 22.
5 is a control device for controlling 5.

Next, the operation will be described with reference to FIG. In order to carry out the reheating operation at predetermined time intervals (at intervals of TM minutes) to keep the hot water temperature in the bathtub 20 constant, first, step 3
At 0, the circulation pump 14 is operated to move the water in the bathtub 20 to the adapter 23, the connection pipe 24, the circulation inlet 17, and the temperature detector 13.
The circulation pump 14, the flowing water detector 15, the heat exchanger 12, the circulation outlet 18, the connection pipe 24, and the adapter 23 are circulated in this order. Then, after confirming the flowing water by the flowing water detector 15 in step 31, immediately in step 32 the burner 25 is ignited to start the heating operation, and in step 33, after a lapse of a certain time (after TS seconds), the temperature detector 13 of the temperature detector 13 is started. The detected temperature is compared with the set temperature of the temperature setter 22, and if the detected temperature is lower than the set temperature, the burner 25 is continuously burned in step 35 to perform the heating operation up to the set temperature, and then the hot water temperature is changed in step 36. When the temperature exceeds the set temperature, the burner 25 is detected in step 37 and the circulation pump 14 is detected in step 38.
To stop. Then, in step 39, this operation is repeated again after a predetermined time has elapsed (after TM minutes), so that the hot water temperature in the bathtub 20 can be kept constant.

On the other hand, when the detected temperature is higher than the set temperature, the burner 25 is stopped in step 40 and the circulation pump 14 is stopped in step 41 immediately, and the larger the difference between the detected temperature and the set temperature is, the next reheating operation is performed. Until the time T is increased by the control device 26 in step 42 and the operation is repeated again in step 43 after the time T has elapsed, the hot water temperature in the bathtub 20 can be kept constant. is there.

In this series of operations, the reheating operation is performed, and after a lapse of a predetermined time (after TM minutes), the normal connection pipe 24
Since the temperature of the hot water in the inside becomes low, the burner 25 is ignited immediately after the circulation pump 14 is operated to perform the heating operation, so that the cold water in the connecting pipe 24 is prevented from flowing into the bathtub 20 as much as possible, and a certain period of time elapses. After (TS seconds later)
When the detected temperature and the set temperature are already overheated when compared, the hot water temperature in the bathtub 20 gradually rises for each additional heating by increasing the time T until the next additional heating operation. Without this, the temperature of the hot water in the bathtub 20 can be kept constant. As a result, the temperature of the hot water in the bathtub 20 can be accurately controlled, and the bathing person can be prevented from feeling uncomfortable.

[0013]

As described above, according to the present invention, since the burner is ignited and the heating operation is started immediately after the operation of the circulation pump, the cold water in the connecting pipe is prevented from flowing into the bathtub as much as possible, and the bath water in the bathtub is minimized. The hot water temperature can be controlled more accurately, and as a result, the bathing person can be prevented from feeling uncomfortable. In particular, when the reheating device and the bathtub are installed separately from each other, the connecting pipe is long, and a large amount of cold water remains in the connecting pipe in the winter or the like, so that the above effect can be more remarkably exhibited.

[Brief description of drawings]

FIG. 1 is a system diagram showing the structure of a reheating device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the same operation.

FIG. 3 is a system diagram showing the structure of a conventional reheating device.

FIG. 4 is a flowchart showing the same operation.

[Explanation of symbols]

 11 Bath Pipe 12 Heat Exchanger 13 Temperature Detector 14 Circulation Pump 15 Flowing Water Detector 19 Bathroom 20 Bathtub 22 Temperature Setting Device 24 Connection Piping 25 Burner 26 Control Device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaatsu Inoue 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

Claim: What is claimed is: 1. A heat exchanger, a burner for heating water in the heat exchanger, a circulation pump connected to the heat exchanger, and the heat exchanger are connected to a bath by a pair of connecting pipes. A bath circulation path configured as described above, a temperature detector and a water flow detector provided in this bath circulation path, and a controller for controlling the burner and the circulation pump are provided, and a reheating operation is performed at predetermined intervals to perform a reheating operation in the bathtub. In order to keep the hot water temperature constant, the controller operates the circulation pump to ignite the burner immediately after confirming the flowing water by the flowing water detector, and after a certain period of time, the temperature detected by the temperature detector and the bathroom, etc. If the detected temperature is lower than the set temperature, the burner is continuously burned to perform heating operation up to the set temperature, and if the detected temperature is higher than the set temperature, bar And wherein the circulation pump with stops, the detected temperature and the set temperature and the difference Reheating device performs control to increase the time until the next reheating operation in accordance with the.