JP2009162445A - Hot-water supply bath device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot-water supply bath device stopping reheating in safety even when a bath thermistor stopping the reheating of a bath is failed. <P>SOLUTION: This hot-water supply bath device has an one-can two-channel-type heat exchange can body 1 in which heat exchange pipes 5, 7 of a bath circulation circuit 4 for bath reheating and a hot water supply circuit 6 for hot water/water supply are penetrated through the same fin 3, and which is heated by one burner 2. The bath circulation circuit 4 is provided with the bath thermistor 12 for detecting that a circulation pump 11 and the bath are boiled up to a set temperature, and further the heat exchange pipe 7 for hot water supply near the heat exchange pipe 5 for the bath is provided with a heat exchange thermistor 17 detecting a temperature of the heat exchange pipe 7 for hot water supply, and controlling the combustion of the burner 2 in bath reheating single use. Since the failure of the bath thermistor 12 is determined and the combustion of the burner 2 is stopped, when the number of stops of the combustion of the burner 2 per a specific time by the heat exchange thermistor 17 becomes more than the prescribed number of times during the bath single use, the device is used in safety and at ease at all times. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a 1-can 2-water-channel hot-water supply bath apparatus having a bath reheating function and a hot-water supply function.

For this type of conventional type, the continuous heating time limit of the bath is calculated from the amount of hot water and the set temperature of the bath, and when the continuous heating time limit has elapsed, the reheating is stopped as a bath thermistor failure to prevent abnormal heating. It was something to do. (For example, refer to Patent Document 1.)
Japanese Patent No. 3698337

  By the way, with this conventional device, it is not applicable to models that cannot measure the amount of hot water in the bath, and malfunctions if the amount of hot water changes due to hot water, hot water or water from the bath faucet, etc. Thus, there is a problem that a failure of the bath thermistor cannot be reliably detected.

  This invention pays attention to this point and solves the above-mentioned drawbacks. In particular, in the present invention, the heat exchange pipes of the bath circulation circuit for reheating the bath and the hot water supply circuit for hot water supply are the same. This is equipped with a 1-can 2-water-channel heat exchange can body that passes through the fins and is heated by a single burner, and this bath circulation circuit is equipped with a circulation thermistor and a bath thermistor that detects that the bath has boiled to the set temperature. In addition, the heat exchange pipe for hot water supply in the vicinity of the heat exchange pipe for bath is equipped with a heat exchange thermistor that detects the temperature of the heat exchange pipe for hot water supply when using the bath alone and controls the combustion of the burner. When the number of burner combustion pauses per fixed time by the heat exchange thermistor exceeds a predetermined number of times, it is determined that the bath thermistor has failed and the burner combustion is stopped.

  Further, in the second aspect, the heat exchange pipes of the bath circulation circuit for reheating the bath and the hot water supply circuit for hot water hot water supply penetrate the same fin, and heat by one can two water channel system heated by one burner. The bath circulation circuit is equipped with a replacement thermistor and a bath thermistor that detects that the bath has boiled to the set temperature, and a hot water supply heat exchange pipe near the bath heat exchange pipe has a bath alone. When a heat exchange thermistor that detects the temperature of the heat exchange pipe for hot water supply during use and controls the combustion of the burner is used, and when the heat exchange thermistor detects a temperature higher than a predetermined temperature for a predetermined number of times or for a predetermined time during the use of the bath alone, The combustion of the burner is stopped by judging that the bath thermistor has failed.

  Further, according to the third aspect, the heat of the one-can two-water channel system in which the heat exchange pipes of the bath circulation circuit for reheating the bath and the hot water supply circuit for hot water hot water supply pass through the same fin and are heated by one burner. The bath circulation circuit is equipped with a replacement thermistor and a bath thermistor that detects that the bath has boiled to the set temperature, and a hot water supply heat exchange pipe near the bath heat exchange pipe has a bath alone. A heat exchange thermistor that controls the combustion of the burner by detecting the temperature of the heat exchange pipe for hot water supply when in use is used, and the combustion control of the burner by the heat exchange thermistor performs the minimum amount of combustion for a predetermined number of times or for a predetermined time while using the bath alone If this is the case, it is determined that the bath thermistor has failed, and combustion of the burner is stopped.

  According to the first aspect of the present invention, the temperature detected by the heat exchange thermistor rises as the temperature of the bath water rises, so the combustion of the burner is temporarily stopped, and the temperature of the burner thermistor decreases again as the temperature of the heat exchange thermistor decreases. Combustion is restarted, and this combustion stop and restart are repeated, but since there is no complete stop, this ON / OFF cycle is shortened, so it can be determined that the bath thermistor has failed, and therefore a new sensor is provided. Therefore, it can be reliably detected by using a heat exchange thermistor for controlling the burner, the continuation of combustion can be prevented and safety can be improved, and it can always be used with peace of mind.

  Further, according to claim 2, since it is determined that the bath thermistor is malfunctioning due to the temperature rise of the heat exchange thermistor itself accompanying the temperature rise of the bath water, it is possible to respond quickly and reliably detect without malfunctioning. Of course, without using a new sensor, it can be detected reliably using a heat exchanger thermistor for burner control, and the safety can be improved by preventing the continuation of combustion. It also has the effect to say.

  Further, according to the third aspect, the temperature detected by the heat exchange thermistor increases as the temperature of the bath water rises. Therefore, the failure of the bath thermistor is determined based on the number of times and the time that the burner combustion is controlled to the minimum combustion amount. Therefore, it can be reliably detected without worrying about malfunction, and of course, without using a new sensor, it can be reliably detected using a heat exchanger thermistor for burner control, preventing continuation of combustion and safety. In addition, it has the effect that it can be used with peace of mind.

Next, an embodiment of the present invention will be described based on a hot water bath apparatus illustrated.
1 is a heat exchange can body heated by the combustion heat of a burner 2 fueled by kerosene provided below; a heat exchange pipe 5 for a bath constituting a part of a bath circulation circuit 4 on a plurality of identical fins 3; A hot water supply heat exchange pipe 7 constituting part of the hot water supply circuit 6 for hot water supply is provided therethrough.

  The bath circulation circuit 4 is composed of an outward pipe 9 and a return pipe 10 that connect the bathtub 8 and the heat exchange pipe 5 for the bath. The forward pipe 9 detects and sets the temperature of the circulation pump 11 and the bath water. And a bath thermistor 12 that stops the reheating operation by detecting the boiling temperature of the water.

  13 is a mixing valve that mixes the water supplied from the bypass pipe 14 branched from the water supply side of the hot water supply circuit 6 and the hot water after passing through the heat exchange pipe 7 for hot water supply. Hot water supply by a hot water supply thermistor 15 provided on the downstream side. The hot water supply thermistor 15 adjusts the mixing flow rate from the detected temperature and the hot water set temperature to supply hot water at the set temperature. Is intended to control.

  Reference numeral 17 denotes a heat exchange thermistor provided in the hot water supply heat exchange pipe 7 in the vicinity of the bath heat exchange pipe 5. The heat exchange thermistor 17 controls the combustion of the burner 2 via the hot water supply control unit 16 for bath use alone. However, if the temperature is less than 60 ° C, the combustion is 10,000 kcal / h, the combustion is 8000 kcal / h if it is 60 ° C or more and less than 70 ° C, the minimum combustion amount is 5000 kcal / h if it is 70 ° C or more and less than 80 ° C, and pauses if it is 80 ° C or more. The hot water remaining in the hot water supply heat exchange pipe 7 is prevented from becoming a high temperature state by controlling so that it is recombusted when the temperature drops.

  Then, the combustion stop of the burner 2 and the stop of the circulation pump 11 in the normal chasing operation are performed when the bath thermistor 12 has reached the set temperature set by the remote controller (not shown) or the like. In the event that this bath thermistor 12 fails, the number of combustion pauses by detecting the temperature of the hot water supply water at 80 ° C. or higher of the heat exchange thermistor 17 is 3 times here. The hot water supply control unit 16 counts the number of times or more per minute, and determines that the bath thermistor 12 is out of order and stops the circulation pump 11 and the burner 2 from burning. Since the heat exchange pipe 7 for hot water supply provided with the heat exchanger thermistor 17 is provided in the same fin 3, when the bath thermistor 12 fails, the heat exchanger thermistor 1. Therefore, by counting the number of times per minute that the combustion is temporarily stopped due to the temperature rise, it is possible to act as a substitute for the bath thermistor 12 and to ensure safety. is there.

  Next, the operation of this embodiment will be described with reference to the flowchart shown in FIG. 3. When the bath is now used alone, the circulation pump 11 of the bath circulation circuit 4 is driven in step 18, so that the bathtub water in the bathtub 8 is driven. In the bath heat exchange pipe 5, combustion of the burner 2 is started in step 19, and the bath water is sequentially heated by the combustion heat of the burner 2.

  In step 20, it is detected whether the detected temperature of the hot water supply by the heat exchanger thermistor 17 is less than 60 ° C. If YES, the process proceeds to step 21 and the burner 2 is burned at 10,000 kcal / h. It is determined whether the detected temperature of the AC thermistor 17 is 60 ° C. or higher and lower than 70 ° C. If YES, the burner 2 is burned at 8000 kcal / h in Step 23, and if NO, the process proceeds to Step 24 and the detected temperature of the heat exchanger thermistor 17 is 70 ° C. or higher. It is determined whether the temperature is less than 80 ° C., and if YES, burner 2 is burned at 5000 kcal / h in step 25. If NO, the process proceeds to step 26 to determine whether the detected temperature of heat exchanger thermistor 17 is 80 ° C. or higher. The combustion of the burner 2 is temporarily stopped.

  Further, after step 27, the routine proceeds to step 28, where it is judged whether the number of combustion pauses of the burner 2 is frequent or more than 3 times / minute, and after NO and steps 21, 23, 25, the routine proceeds to step 29. 12 determines whether the set temperature has been detected. If YES, the process proceeds to step 30 to stop the reheating operation, and the circulation pump 11 is stopped and the combustion of the burner 2 is also stopped. If NO at step 26, the process returns to step 20.

  On the other hand, when the number of pauses of the burner 2 is 3 times / minute in step 28, it is determined that the bath thermistor 12 has failed, and the process proceeds to step 31 with YES to stop the circulation pump 11 and stop the combustion of the burner 2. This is a notification that the bath thermistor 12 is malfunctioning.

  Therefore, when the bath thermistor 12 fails and the reheating operation cannot be stopped, the heat exchanger thermistor 17 substitutes the number of times the burner 2 is stopped, so there is no danger that the temperature of the bath water rises abnormally and is extremely safe. It can be used with peace of mind, and it cannot be used until the repair is completed, and accurate hot water temperature cannot be obtained, but it can be replenished for the time being, and it is easy to use.

  Next, another embodiment shown in FIG. 4 will be described. If the same parts are denoted by the same reference numerals and the description thereof is omitted and only different parts are described, step 28 becomes step 32 and the heat exchange thermistor 17 is set to 80 ° C. It is determined whether the number of times detected above is 3 times / minute or a detection time of 80 ° C. or more is 30 seconds / minute. If YES, the process proceeds to step 31 as a failure of the bath thermistor 12, and the circulation pump 11 is stopped. The combustion of the burner 2 is stopped, and a failure notification of the bath thermistor 12 is also made. If NO, the routine proceeds to step 29 as usual.

  As a result, it is determined that the bath thermistor 12 has failed due to the temperature rise of the heat exchanger thermistor 17 itself accompanying the temperature rise of the bath water, so that it is possible to respond quickly and reliably without worrying about malfunction. Without providing a new sensor, the heat exchanger thermistor 17 for controlling the burner 2 can be reliably detected, the continuation of combustion can be prevented and the safety can be improved, and it can be always used with peace of mind. It also has an effect.

  Next, another embodiment shown in FIG. 5 will be described. If the same parts are denoted by the same reference numerals and the description thereof is omitted and only different parts will be described, the process proceeds to step 33 after step 25 and the minimum of the burner 2 is described. It is determined whether the combustion amount of 5000 kcal / h is a predetermined number of times here, 3 times / minute or a predetermined time, here, 30 seconds / minute. If YES, the process proceeds to step 31 as a failure of the bath thermistor 12, and the circulation pump 11 is stopped, the combustion of the burner 2 is stopped, and the failure of the bath thermistor 12 is also notified. In NO, the process proceeds to step 29 as usual.

  Thereby, since the detection temperature of the heat exchange thermistor 17 also rises with the temperature rise of the bath water, since the failure of the bath thermistor 12 is determined based on the number of times and the time when the combustion of the burner 2 is controlled to the minimum combustion amount, It can be reliably detected without worrying about malfunctions. Of course, without using a new sensor, it can be detected reliably using the heat exchanger thermistor 17 for controlling the burner 2, and the continuation of combustion is prevented to ensure safety. In addition, it has the effect that it can be used with peace of mind.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing of the hot-water bath apparatus which shows one Embodiment of this invention. The principal part block diagram of the same electric circuit. The flowchart of the principal part. The principal part flowchart of other embodiment. The principal part flowchart of other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchange can body 2 Burner 3 Fin 4 Bath circulation circuit 5 Bath heat exchange pipe 6 Hot water supply circuit 7 Heat exchange pipe 11 for hot water supply Circulation pump 12 Bath thermistor 17 Heat exchange thermistor

Claims (3)

  It has a heat exchange can body of 1 can 2 water channel system that passes through the same fin through the heat exchange pipes of the bath circulation circuit for bathing and the hot water supply hot water supply circuit, and heats it with one burner. This bath circulation circuit is provided with a circulation thermistor and a bath thermistor that detects that the bath has boiled to the set temperature, and the heat exchange pipe for hot water supply near the heat exchange pipe for bath uses heat exchange for hot water supply when the bath is used alone. A heat exchange thermistor that controls the combustion of the burner by detecting the temperature of the pipe, and when the number of pauses of the burner combustion per fixed time by the heat exchange thermistor exceeds a predetermined number while using the bath alone, Hot water bath equipment characterized by stopping the combustion of the burner by judging that it is malfunctioning.   It has a heat exchange can body of 1 can 2 water channel system that passes through the same fin through the heat exchange pipes of the bath circulation circuit for bathing and the hot water supply hot water supply circuit, and heats it with one burner. This bath circulation circuit is provided with a circulation thermistor and a bath thermistor that detects that the bath has boiled to the set temperature, and the heat exchange pipe for hot water supply near the heat exchange pipe for bath uses heat exchange for hot water supply when the bath is used alone. It has a heat exchange thermistor that detects the temperature of the pipe and controls the combustion of the burner, and if the heat exchange thermistor detects a temperature higher than a predetermined temperature for a predetermined number of times or for a predetermined time while using the bath alone, A hot water bath apparatus characterized by stopping combustion of the burner by judging.   It has a heat exchange can body of 1 can 2 water channel system that passes through the same fin through the heat exchange pipes of the bath circulation circuit for bathing and the hot water supply hot water supply circuit, and heats it with one burner. This bath circulation circuit is provided with a circulation thermistor and a bath thermistor that detects that the bath has boiled to the set temperature, and the heat exchange pipe for hot water supply near the heat exchange pipe for bath uses heat exchange for hot water supply when the bath is used alone. A heat exchange thermistor that detects the temperature of the pipe and controls the combustion of the burner, and when the combustion control of the burner by the heat exchange thermistor performs the minimum combustion amount for a predetermined number of times or for a predetermined time during the use of the bath alone, Hot water bath equipment characterized by stopping the combustion of the burner by judging that it is malfunctioning.

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