JPH09280652A - Additional heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always ensure proper additional heating when a bath temperature sensor after detecting hot water temperature in a bathtub detects lower temperature during additional heating by updating the detector lower temperature as temperature in the bathtub, and controlling additional heating operation based upon the detected temperature. SOLUTION: An additional heating instruction warm switch is operated to circulate hot water in a bathtub with use of a circulation pump 47 and heat it through a heat exchange coil. After the lapse at a predetermined time (e.g. 25 seconds) since the time of the circulation pump 47 is turned on, detection temperature of a bath temperature sensor 49 is detected as hot water temperature in the bathtub and is stored in a hot water temperature comparison value Ac as an initial value. The operation is judged to be additional heating when the hot water temperature comparison value Ac is lower than set temperature of a remote controller 60, and hence additional heating is performed. Further, when the bath temperature sensor 49 detects a lower temperature than the hot water temperature comparison valve Ac, and the state continues of a predetermined time, detected temperature A1 of the bath temperature sensor 49 is updated as the hot water temperature comparison value.

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 a bath, in which hot water in a bathtub is circulated for reheating.

[0002]

2. Description of the Related Art Conventionally, for reheating a bath, for example, when the temperature of the bathtub drops, it is heated to a set temperature, and a remote controller that controls the temperature of the hot water in the bathtub is instructed to reheat it. There is a switch provided, and when the switch is operated, the temperature is raised to a set temperature or a predetermined temperature higher than the current temperature. In this way, the bather can conveniently heat the hot water in the bathtub to a desired temperature by reheating it when the temperature of the hot water in the bathtub drops.

[0003]

However, the conventional ones have the following problems. A conventional reheating device takes, for example, hot water from a bathtub, forms a circulation path for returning the hot water from the bathtub to the bathtub, and heats it by a heat exchanger in the middle of the circulation. Since a sensor is provided to detect the temperature of the hot water in the bathtub, the temperature sensor is not provided in the bathtub,
There has been a problem that the temperature detected by the flow temperature sensor does not match the temperature of the hot water in the bathtub.

For example, when the position of the bathtub and the position of the heat exchanger for additional heating are distant from each other, the hot water temperature in the bathtub and the temperature in the piping of the circulation path are likely to deviate from each other. Further, when the piping of the circulation path is located at a position where the sunlight is received, the temperature inside the piping tends to increase due to solar heat. Further, in the case of reheating by a hot water storage type heat exchanger, it is always heated, and the temperature inside the pipe of the circulation path tends to rise. As described above, there is a problem that the temperature of the hot water in the bathtub does not match the temperature detected by the flow temperature sensor due to various causes, and the temperature to be heated at the time of additional heating is erroneously determined.

Therefore, the present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a reheating device capable of performing appropriate reheating.

[0006]

In order to achieve the above object, the invention according to claim 1 is a reheating apparatus for reheating by taking out hot water from a bathtub and heating it and returning it to the bathtub. A flow temperature sensor for detecting a temperature, and a temperature control means for determining and updating the temperature as a bath temperature when the flow temperature sensor detects a lower temperature during heating after detecting the hot water temperature of the bath. And a reheating control means for controlling the reheating operation based on the temperature detected by the temperature control means.

According to the first aspect of the present invention, when a value lower than the hot water temperature which has already been detected is detected during the reheating operation, the previously detected value is detected. As false detection, the additional heating control is performed based on the lower detected temperature.

According to the second aspect of the present invention, a flow circulation circuit comprising a bath, a flow outward path for taking out hot water from the bath and a flow return path for returning hot water to the bath, and a supplementary circuit for heating the hot water flowing in the circulation circuit. A flow reheating device having a heating means for heating, a circulation pump for circulating the hot water in the circulation circuit,
A flow temperature sensor that is provided on the circulation circuit to detect the temperature of hot water in the circulation circuit, and in the reheating operation, the reheating is performed based on the temperature detected by the flow temperature sensor after driving the circulation pump. If the heating control means for determining the heating temperature to perform heating control and performing heating control, and if the flow temperature sensor subsequently detects a low temperature for a predetermined time or longer during the heating operation, based on that temperature, And a temperature control means for updating the additional heating temperature.

According to the second aspect of the present invention, the flow temperature sensor is arranged in the circulation circuit for reheating the hot water in the bathtub, and the heating control means performs the heating control based on the detection information of the flow temperature sensor. I do. If the flow temperature sensor continues to detect a lower hot water temperature for a predetermined time or longer even during the heating operation, the heating temperature is updated based on the temperature, and the heating temperature is updated to control the heating. I do.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. FIG. 1 shows the configuration of a water heater to which the reheating device of the present invention is applied. To explain the outline, the water heater 1 is of a hot water storage type as shown in FIG. Exhaust mechanism 30 installed
And a burner 21 and the like facing the combustion chamber.

The hot-water storage can body 10 is designed to store hot water inside, and the heat exchange coil 11 from the outside is passed through the inside to form a so-called semi-hot-water storage can body. The heat exchange coil 11 is part of a bath reheating circuit or the like. In addition, a water inlet 31 and a hot water outlet 32 are connected to the hot water storage can body 10 so that water can be entered and discharged.

Further, the hot water storage canister 10 is provided with a hot water storage temperature sensor 12 for detecting the temperature of the hot water stored therein. Further, a can body temperature sensor 13 is provided for detecting the temperature of the hot water storage can body 10 itself and stopping the operation when the hot water storage can body 10 is overheated.

The burner 21 is a spray nozzle 2 for petroleum or the like.
2, consisting of an igniter 23 and a blower 24. These receive information from each sensor such as the hot water storage temperature sensor 12 of the water heater on the basis of a command from the remote controller 60, and perform predetermined control operation by the predetermined control software by the burner 21 and other device parts. Command to.

Further, in the hot water supply device 1, the hot water storage canister 10 is provided with a water inlet 31 for supplying city water or the like to the hot water storage canister 10.
When the hot water in the hot water storage canister 10 is used up and is used up, it is supplied by the water inlet 31. And the hot water storage can 10
A hot water outlet 32 for supplying hot water to the faucet 33 or to the bath side is connected. A hot water supply bypass passage 34 is connected between the water supply passage 31 and the hot water supply passage 32, and a proportional valve 35 is provided in the hot water supply bypass passage 34.
The proportional valve 35 adjusts the mixing ratio of the water supplied through the hot water supply passage 31 and the hot water supply bypass passage 34 and the hot water supplied through the hot water supply passage 32 to supply the hot water to the bath side at an appropriate temperature. The hot water is supplied to the bath side by the drop-in path 37, the drop-in path 37 is connected to the hot water exit path 32 on the downstream side of the connection point with the hot-water supply bypass path 34, and the drop-in solenoid valve 38 is arranged. Opening / closing is used to switch execution / stop.

On the bath side, an outward path 41 from the bathtub 40 to the heat exchange coil 11 for exchanging heat with the hot water storage can 10, and a return path 42 from the heat exchange coil 11 to the bathtub 40 are provided. A circulation circuit 43 for reheating is constituted by 42. In addition, a flow bypass path 44 is arranged between the outward path 41 and the return path 42.
The drop path 37 is connected to the. A three-way valve 45 is arranged at a connection point between the flow-by-pass passage 44 and the outward passage 41. By switching the three-way valve 45, hot water is supplied to the bathtub through the flow-by-pass passage 44, the three-way valve 45 and the outward passage 41 when the flow is dropped. When supplying and reheating, the flow bypass passage 44 and the outward passage 41 are cut off, and the circulation circuit 43 enables reheating.

Further, the outward path 4 which constitutes the flow circulation circuit 43
1, a water level sensor 46 such as a pressure sensor for detecting the water level of the bath 40, a circulation pump 47 for circulating the hot water of the bath in the circulation circuit 43, and a water flow for detecting the circulation flow in the circulation circuit 43. A switch 48 and a flow temperature sensor 49 for detecting the temperature of hot water in the bathtub are provided. A water injection temperature sensor 50 for detecting the temperature of water or hot water flowing in the return path is provided on the return path 42.

Next, a remote controller for instructing operation of the water heater 1 will be described. FIG. 2 shows its appearance. The remote controller 60 is provided in a bathroom, for example, and is used for operating instructions from the bathroom.

As shown in FIG. 2, the remote controller 60 is provided with a display section 61 and an operation section 62. The display section 61 displays temperature information of the hot water in the bathtub, water level information, etc. An operation switch 63, an automatic switch 64, a warm switch 65, and other operation switches are provided at 62. The warm switch 65 is a switch for raising the temperature of the bathtub by performing additional heating.

Next, the controller 70 which controls the water heater 1 will be described. The controller 70 controls the water heater 1 or the operation of the water heater based on the operation of the remote controller 60, for example.
FIG. 3 shows the configuration of the controller 70. FIG.
As shown in FIG. 3, the controller 70 is composed of a control unit 71 and a storage unit 80. The remote controller 60 is connected to the controller 70, and various sensors such as the flow temperature sensor 49 and various drives such as the circulation pump 47 are driven. Parts are connected.

The control unit 71 includes hot water supply control means 72, additional heating control means 73, temperature control means 74 and other control means 7.
It consists of five. The hot water supply control means 72 is means for supplying hot water to the faucet 33, supplying hot water from the hot water storage can 10 side to the bathtub 40, and controlling the overall hot water supply control of the water heater 1.

The reheating control means 73 is a means for controlling the operation of circulating the hot water in the bathtub 40 through the circulation circuit 43 to heat the reheating. The additional heating temperature control unit 74 is the additional heating control unit 7.
3 is a means for judging the temperature of the hot water in the bathtub when performing reheating, and for deciding how many times the reheating is actually performed if necessary. Other control means 75
Are means for performing controls other than those described above, and are means for monitoring various sensors and controlling data transmission.

The storage unit 80 stores programs for operating the respective control means, temporarily stores detection values of various sensors, and temporarily stores the heating temperature determined by the heating temperature control means 74. are doing.

Next, the operation of the present invention will be described with reference to the flowchart of FIG. Remote controller 6
The warm switch 65 provided at 0 is a switch for instructing reheating, and is operated when the bather wants to make the hot water temperature higher than the current hot water temperature. This warm switch 6
5 is operated (step S1), the lamp built in the switch 65 is turned on (step S1).
2) Notify that the operation has been accepted, turn on the circulation pump 47 to circulate the hot water in the bath 40 through the circulation circuit 43, and heat it by the heat exchange coil 11 (step S).
3).

After a predetermined time (for example, 25 seconds) has passed since the circulation pump 47 was turned on (step S
4) The temperature detected by the flow temperature sensor 49 is detected as the temperature of the hot water in the bathtub (step S5). The detected temperature (A0 ° C.) at this time is stored in the hot water temperature comparison value Ac as an initial value (A0 → Ac). In this way, the temperature of the bathtub is detected after a predetermined time has passed after turning on the circulation pump 47, because the temperature of the hot water in the bathtub and the temperature in the circulation circuit 43 provided with the flow temperature sensor 49 are the same. Because it may not
This is because the temperature in the bathtub 40 is detected after the hot water reaches the flow temperature sensor 49 to detect the bath temperature more accurately. This is because if reheating is performed based on a temperature different from the hot water temperature of the bathtub operated by the user, it cannot be reheated to the temperature desired by the user.

Next, the hot water temperature comparison value Ac and the flow temperature sensor 4
The detected value of 9 is compared (step S6). Since the hot water temperature of the bathtub gradually rises during the normal reheating operation, the detected value of the flow temperature sensor this time is higher than the flow temperature detected previously and stored as the hot water temperature comparison value. Thus, during the normal reheating operation, it is next determined whether the hot water temperature comparison value Ac is lower than the temperature 1 ° C. lower than the set temperature of the remote controller 60 (step S).
7). If the temperature is lower, it is determined that the hot water in the bathtub is reheating, and heating is performed until the hot water temperature in the bathtub reaches the temperature set by the remote controller 60 (step S8). The lamp of the switch 65 is turned off as well as the circulation pump 47 is stopped as to whether the burning operation has been completed (step S12).

In step S7, if the hot water temperature comparison value Ac is at least 1 ° C. lower than the set temperature of the remote controller, the reheating is instructed while the hot water temperature in the bathtub is not kept. If the temperature is requested, the temperature is raised to a temperature 1 ° C. higher than the hot water temperature comparison value Ac which is the initial hot water temperature (step S9), and the additional heating is finished (step S12).

Next, the case where the flow temperature sensor 49 detects a temperature lower than the hot water temperature comparison value Ac in step S6 will be described. Since the hot water temperature gradually rises during normal reheating, comparing the hot water temperature comparison value Ac, which is the detection value of the flow temperature sensor 49 at the beginning of the reheating, with the subsequent detection value of the flow temperature sensor 49, the subsequent flow The detected value of the temperature sensor 49 should be higher. However, there are cases where the flow temperature sensor 49 detects a low temperature although the reheating is actually performed.

Such a case occurs because the flow circulation circuit 43 is connected to the heat exchange coil 11 and the heat exchange coil 11 is constantly heated, so the flow circulation circuit 43 is
The temperature inside tends to be higher than the temperature of hot water in the bathtub. Then, in steps S3 and S4, the hot water is circulated in the flow circulation circuit 43 to equalize the temperature of the hot water in the bath. However, if the flow length of the flow circulation circuit 43 is long and the temperature in the pipe is sufficiently high, Instead, the flow temperature sensor 49 erroneously detects a temperature higher than the actual bath water temperature. In other cases, the capacity of the circulation pump 47 is reduced, the water flow resistance of the water flow switch 48 is generated due to dust, etc., and the amount of circulating water is reduced due to the corrosion in the pipe and the increase in the water flow resistance due to the adhesion of dust. The inside may not reach the bath temperature. Further, the pipe may be exposed, and when the pipe is heated by solar heat, a temperature higher than the hot water temperature of the bathtub is detected by the flow temperature sensor 49.
May be detected.

As described above, if the flow temperature sensor 49 detects a temperature higher than the actual hot water temperature of the bathtub, the additional heating temperature is determined based on the detected temperature, which is higher than the temperature intended by the bather. It is not desirable because it reheats to a high temperature. Therefore, in this embodiment, the operations of steps S10 and S11 are performed. That is, when the flow temperature sensor 49 detects a temperature lower than the hot water temperature comparison value in step S6, it is determined whether or not the state continues for a predetermined time (for example, 5 seconds) (step S10), and the state is determined. If continued, the detected temperature A1 of the flow temperature sensor 49 at that time
Is updated as the hot water temperature comparison value (A1 → Ac) (step S
11) Based on the updated hot water temperature comparison value, in steps S7 to S9, the temperature to be raised by the additional heating is determined, and the additional heating operation is performed.

As described above, even when the hot water temperature in the bathtub is erroneously detected at a high temperature in the early stage of the reheating and the reheating temperature is judged to be higher than the desired temperature, the correct temperature is not obtained thereafter. If detected, the appropriate heating temperature can be corrected.

In the above embodiment, the hot water storage type reheating type has been described, but it goes without saying that it may be applied to a reheating type by burning and heating with gas or the like to exchange heat. Therefore, it is applicable as long as it performs the reheating operation.

[0032]

As described above, according to the first aspect of the present invention, when a value lower than the hot water temperature which has already been detected is detected during the reheating operation. In addition, since the additional heating control is performed based on the lower detected temperature as a false detection of the previously detected value, even if the hot water temperature of the bathtub does not match the temperature of the flow temperature sensor position, more accurate If the hot water temperature is detected, the additional heating control is performed based on the temperature, so that there is an effect that the appropriate additional heating control can be performed.
Further, since the temperature is updated to a lower temperature, there is an effect that the bather does not get hotter than the desired temperature when an erroneous detection is made.

According to the second aspect of the present invention, the flow temperature sensor is arranged in the circulation circuit for reheating and circulating the hot water in the bathtub, and the additional heating control means controls the additional heating based on the information detected by the flow temperature sensor. I do. And, even though the reheating operation is in progress,
When the flow temperature sensor continuously detects a lower hot water temperature for a predetermined time or longer, it performs heating control based on the temperature, so that the heating control is performed by updating the heating control temperature. At this time, there is an effect that the bather does not get hotter than the desired temperature. In addition, for example, when using a hot water storage type heat exchange means or when the circulation circuit for additional heating is to be heated by solar heat, make a judgment higher than the actual hot water temperature. However, even in such a case, there is an effect that in the final case, the desired heating temperature of the bather can be correctly determined and a preferable heating operation can be performed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an example to which a reheating device of the present invention is applied.

FIG. 2 is an explanatory diagram of a remote controller.

FIG. 3 is an explanatory diagram of a control block of the present invention.

FIG. 4 is a flowchart showing the operation of the present invention.

[Explanation of symbols]

 1 Water Heater 10 Hot Water Storage Can 11 Heat Exchange Coil (Additional Heating Means) 20 Combustion Chamber 38 Flow Drop Solenoid Valve 40 Bathtub 41 Flow Forward Path 42 Flow Return Path 43 Circulation Circuit 45 Three-way Valve 47 Circulation Pump 48 Water Flow Switch 49 Flow Temperature Sensor

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kimiaki Asano 93 Edo-machi, Chuo-ku, Kobe-shi, Hyogo Stock company Noritsu (72) Inventor Yoshihide Nakajima 93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo Stock society Inside the company

Claims (2)

[Claims] 1. A reheating device for reheating by taking out hot water from a bathtub and heating and returning it to the bathtub, wherein a flow temperature sensor for detecting the temperature of the hot water in the bathtub, and the flow temperature sensor is a hot water temperature in the bathtub. When a lower temperature is detected during the reheating after detecting the temperature, the temperature control means for determining and updating the temperature as the temperature of the bath, and the additional control for controlling the reheating operation based on the temperature detected by the temperature control means. A reheating device comprising: a heating control means. 2. A flow circulation circuit comprising a bathtub, a flow-out path for taking out hot water from the bathtub and a flow-back path for returning hot water to the bathtub,
A flow reheating device having a reheating heater for heating the hot water flowing in the circulation circuit, wherein the circulation pump drives the hot water in the circulation circuit in a circulating manner, and the hot water in the circulation circuit provided on the circulation circuit. Flow temperature sensor for detecting the temperature of, and during the reheating operation, after the circulating pump is driven, the reheating temperature is determined based on the temperature detected by the flow temperature sensor, and the reheating temperature is determined to control the reheating. Heating control means to perform, when the Flo temperature sensor subsequently detects a low temperature for a predetermined time or longer during the heating operation, a temperature control means for updating the heating temperature based on the temperature, A reheating device comprising: