JPH07827Y2 - Reheating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a bathtub reheating device that is economical and has a comfortable hot water temperature.

(Prior Art) In recent years, by heating gas in a bathtub by heating gas, oil, etc. to heat the bath, heating the water in the bathtub, and reheating it after the initial heating, the hot water in the bathtub is kept for a long time. Bath kettles that are equipped with a reheating device that can maintain a proper temperature and can take a comfortable and comfortable bath have been put on the market and are in widespread use.

This reheating is generally performed by restarting heating when the first heating reaches the set temperature and the heating is stopped, then the time from the stop is counted and the set value is reached. Done.

In addition, the configuration of the bath kettle with this additional reheating device is
As shown in FIG. 3, as means for heating the water in the bathtub 8, the bath tank 1, the pipe 2 for guiding the water heated from the water tank 7 of the bath tank 1 to the bathtub 8 and the water tank of the bath tank 1 from the bath tank 8 It comprises a pipe 3 for guiding water to be heated. As means for stopping heating at the set temperature, the temperature sensor 11 for the hot water temperature attached to the bath kettle 1 or the pipe 3 and the fuel supply device 12 when the state of the temperature sensor 11 becomes larger or smaller than the set state The device SW2 for stopping the operation of the fuel supply device 12 or the device SW2 for stopping the operation of the fuel supply device 12 is used as a means for starting heating after a fixed time after the stop.
A timer 13 as a timing device that starts operation in cooperation with the above, and an ignition drive device 14 for operating the ignition device 4 when the timer 13 is reset at a set time.

The bath cauldron 1 includes a circulation type bath cauldron that utilizes convection of heated hot water, a forced circulation bath casket that promotes the convection using a pump, and the like, and a combustion device 4 such as an oil burner or a gas burner. Ignition device 5 that ignites the combustion device 4, fuel supply device 12, and device SW that stops the operation of the fuel supply device 12.
2 and a pipe for supplying fuel to the combustion device 4 are provided in the lower part thereof, and a water tank 7 of the bath kettle 1 heated by the combustion device 4 is provided in the upper part thereof. As the temperature sensor 11, a mechanical one using a bimetal, and an electrical one using a temperature characteristic of a semiconductor such as a thermistor, a transistor or a diode is used.
As the device SW2 that stops the operation of 12, an electromagnetic arm or the like that operates by supplying power with a switch is used. Further, as the timer 13, an electric motor drive timer, an electronic timer having a clock circuit is used, and as the ignition drive device 14, a switch operated by a signal output by the timer 13 at a set time, a relay, a semiconductor electronic device. Switches etc. are used.

(Problems to be solved by the device) However, when setting the time from this stop to heating again, set it so that it is suitable when the surrounding temperature is high and the hot water temperature does not easily drop like summer. , When the ambient temperature is low and the hot water temperature tends to drop like in winter,
The temperature of the hot water will drop so much that it cannot be comfortably bathed before it is heated again. Conversely, if it is set so that it is suitable when the ambient temperature is low and the hot water temperature is likely to drop, such as in the winter, the surroundings will be the same as in the summer. When the temperature of the hot water is high and it is difficult to lower the hot water temperature, it is heated again despite the slight decrease in the hot water temperature, and the heating is stopped immediately by the set hot water temperature. Being done is uneconomical.

The present invention solves such a problem and provides a reheating device in which the degree of heat retention is not affected by the ambient temperature.

(Means for Solving Problems) The present invention relates to a reheating apparatus equipped with means for heating water in a bathtub, means for stopping heating at a set temperature, and means for starting heating after stoppage. It comprises: a means for detecting and a means for counting the time, a means for calculating the complaint of a drop in the temperature of the hot water after the heating is stopped, and a means for setting the time until the next heating depending on its degree. This is a bathtub reheating device.

Hereinafter, description will be given with reference to FIG.

A conventional bathtub reheating device which can be used in the present invention and which has means for heating water in the bathtub and stopping heating at a preset temperature can be used, but heating after stopping heating is started. It is a feature of the present invention that, in the means, the condition of reheating with a fixed time in the past can be changed depending on the ratio of the temperature decrease of the hot water to the time.

For this reason, means for detecting the temperature of the hot water, means for counting the time, means for calculating the degree of decrease in the temperature of the hot water after the heating is stopped, and the time until the next heating are set depending on the degree As the means for detecting the temperature of the hot water, the same one as the temperature sensor 11 can be used, but the one using the temperature characteristics of the semiconductor such as the thermistor, transistor, diode can accurately detect the temperature. It is preferable because it is possible.

An electronic timer 13 having a clock circuit can be used as a means for counting time.

The means for calculating the degree of decrease in the temperature of the hot water after the heating is stopped is a conversion device 23 for converting the change of the temperature sensor 11 into an electric signal, and an analog for binary encoding.
Digital converter AD, and a division program which inputs the binary coded signal and the binary coded signal from the time output terminal provided in the timer 13 and uses the numerical value from the timer 13 as a divisor The CPU15, which is a compact computing device with a built-in, can also be configured by combining logic gates, but generally sold microcomputer systems, one-board microcomputers, etc. that can contain programs have expandability and changeability. Since it is easy, any commercially available product can be used.

As a means to set the time until the next heating according to the degree of decrease in the temperature of the hot water after the heating is stopped, the relationship between the result of the division and the time until the heating is performed again is economical. Determined after considering comfort, CPU 15 has a program for that in advance, in place of the signal that the timer 13 outputs at the set time, a device 16 that sends an ignition signal to the ignition drive device 14 is required, As a program,
As a device 16 for sending an ignition signal, one provided with a lookup table having the value of the result of the division as an address, one using an approximate expression having the value of the result of the division as a variable can be used.
A combination of a normal output interface and an electronic switch can be used.

(Operation) The operation when the forced circulation type bath cooker is used as the bath cooker 1 of the bath cooker according to the present invention will be described with reference to FIGS. 1 and 2.

A. First, when the switch is turned on, the combustion device 4 starts to burn by the ignition device 5.

B. The water guided by the pump 21 is heated from the pipe 3 to the water tank 7 of the bath kettle 1, and the heated water is returned to the bathtub 8 by the pressure of the water guided by the pump 21.

C. When the water in the bathtub 8 is heated and the temperature detected by the temperature sensor 11 reaches the set comfortable temperature, the CPU 1
An output for stopping the combustion operation is output from 5 to the device SW2 for stopping the fuel supply device 12, and the fuel supply device 12 stops the supply of fuel, so that the combustion device 4 stops combustion.

D. From the time it stopped, timer 13 started to operate
The binary coded signal from the time output terminal provided in 13
It is input to the CPU 15, and at the same time, the change of the temperature sensor 11 is converted into an electric signal by the converter 23, and is further binary-coded by the analog-digital converter AD, and the CPU 15 divisors the numerical value from the timer 13. And execute the division program.

E. When the time is decided by the program in consideration of economy and comfort in advance, a signal is sent from the interface for sending the ignition signal to the electronic switch, and the ignition device 5 is activated again to start combustion and heating. .

F. If not stopped, return to B.

(Example) HK bath (Hitachi Chemical Co., Ltd., trade name) was used as the bathtub, and KZ, which was a forced circulation bathtub, was used as the bathtub.
O-3100P (Hitachi Chemical Co., Ltd., trade name) is used.
This bath kettle uses a petroleum burner as its combustion device, and the ignition device uses a spark generator K-05 that operates at 100 V AC.
3-30 (Diamond Electric Co., Ltd., trade name)
The fuel supply device and the device that stops its operation are VS-K63 (Nippon Controls Co., Ltd., trade name) that operates at 100V AC, and a pipe for supplying fuel to the combustion device is provided at the bottom of the device, and the combustion device It is equipped with a water tank heated by. The pipes for guiding the water heated from the bathtub to the bathtub and the pipes for guiding the water heated from the bathtub to the bathtub are rubber pipes.

The temperature sensor is attached to the surface of the pipe that guides the water that heats the PB3M-42D (Shibaura Electronics Co., Ltd., trade name) from the bathtub to the bathtub.

This device is a one-chip microcomputer
The operation is controlled using HD6805 (Hitachi, Ltd., trade name). Inside this microcomputer, a circuit for generating a reference time, a circuit for converting it as data, and software are standard equipment. Also,
As an input interface, ADC as an analog-digital converter that binary-codes the output voltage of the temperature sensor
-0804 (Texas Instruments Inc., trade name) is used as the output interface when one of the upper 1 bits of the 8 data buses of the output ports equipped in the microcomputer is set to 1. Ignition and extinguishing when one of the lower 1 bits is set to 1 and driving current is made to flow from each terminal to the base of the switching transistor through the current limiting resistor and each device is set to operate. .

Including the initial ignition, one program controls ignition and reheating. The second flowchart of this program
Shown in the figure. In this program, the part that sets the time until ignition again due to the temperature drop is based on an approximate expression in which the value of the division result is a variable, and the setting is that the outside air temperature is 5 Even when the temperature was between 30 ℃ and 30 ℃, the hot water temperature could be kept at 38 ℃ ～ 43 ℃.

(Comparative Example) Using the same bathtub and bathtub as the example, an electric motor type timer MTL-6H-AC100V (Matsushita Electric Works, Ltd., trade name) and a relay switch MZ-12 (Takasawa Electric Co., Ltd., product After the initial heating was completed, the fuel was ignited at regular intervals, and the temperature sensor used was a bimetal type switch that stopped the fuel supply device when the hot water temperature was 41 ° C.

As a comparative experiment, the outside air temperature was 5 ℃ and 30 in the environmental test room.
Assuming the case of ℃, it was operated for 5 hours and the decrease in hot water temperature was measured. The results are shown in Table 1.

From this result, it can be understood that the change of the hot water temperature is smaller in this example and is superior.

Another effect of the present embodiment is that the same controller can be used for products with different bath kettle and bathtub capacities, and a low-priced bath can be provided even for the production of a large number of different products. Is possible.

(Effect of device) As described above, according to the present invention, the time until reheating after the completion of the initial heating can be adjusted according to the decrease in hot water temperature, so that a comfortable heat retention system can be provided. .

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flow chart of a program for explaining an embodiment of the present invention, and FIG. 3 is a block diagram showing an example of the conventional invention. Explanation of code 1 …… Bath pot, 2,3 …… Piping 4 …… Combustion device, 5 …… Ignition device 7 …… Water tank, 8 …… Bath 11 …… Temperature sensor, 12 …… Fuel supply device 13 …… Timer, 14 …… Ignition drive device 15 …… CPU, 16 …… Ignition signal sending device 23 …… Conversion device AD …… Analog-digital converter SW2 …… Device for stopping

Claims (1)

[Scope of utility model registration request] 1. A reheating device comprising means for heating water in a bathtub, means for stopping heating at a set temperature, and means for starting heating after the stop, and means for detecting the temperature of hot water and counting time. A reheating device comprising: a heating means, a means for calculating the degree of decrease in the temperature of the hot water after the heating is stopped, and a means for setting the time until the next heating according to the degree.