JP3216929B2 - Bath kettle and method of detecting abnormalities in the piping system of the bath kettle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting an error in the connection of a pipe connecting a main body of a bathtub and a bathtub.
Further, the present invention relates to a method for detecting an error in mounting a cap which is mounted from the inside of a bathtub to a circulation fitting used to connect the pipe to a bathtub.

[0002]

2. Description of the Related Art Conventionally, a bath kettle provided with such piping is constructed as shown in FIG. 3, for example. The bath kettle 1 is provided with a circulation line 2 which is a pipe between the appliance body and the bathtub 8, and a burner 3 and a heat exchanger are provided along the circulation line 2 in the appliance body. 4 and pump 5
, A temperature thermistor 6 and a flowing water switch 7 are set.

In such a bath kettle 1, the pump 5 is driven to draw water collected in the bathtub 8 into the appliance body by the return pipe 2 a of the circulation pipe 2, and the heat exchanger heated by the burner 3. The heat exchange is performed by passing through the heat exchanger 4. Thereby, the heated hot water is poured into the bathtub 8 through the going pipe 2b. Then, the return pipe 2a and the outgoing pipe 2b of the circulation pipeline 2 are connected to a circulation fitting 9 mounted on a bathtub.

FIG. 4 shows such a forward pipe 2 b and a return pipe 2.
a is connected to the circulation fitting 9 to schematically circulate hot water. The actual structure of the circulation fitting and the hot water passage provided therein are different from those shown in the figure, and are complicated. Therefore, in this example, a conceptual diagram for describing the circulation fitting is used. As shown, a first passage 12 a and a second passage 12 b formed in the circulation fitting 9 are guided into the bath 8. In the figure, in a state where the circulation fitting 9 is correctly attached to the bathtub 8, the first passage 12a rises and the second passage 12b
Is located below. The second passage 12b is bent downward, and a circulation fitting cap 11 is attached to the circulation fitting 9;
A filter 16 is accommodated in the cap 11.
In place of the filter 16, for example, the cap 1
In some cases, a filter is formed in one of the holes 13, 14, and 15.

When the circulation fitting cap 11 is properly mounted on the circulation fitting 9, the second
An opening 15 is provided below and corresponding to the passage 12b. Therefore, if the circulation fitting 9 is correctly connected to the pipes (the going pipe 2b and the return pipe 2a) extending from the instrument side, the second passage 12b and the first passage 12a shown in FIG. It is connected so as to match the going pipe 2b and the returning pipe 2a as shown. Thereby, the hot water or water A in the bathtub is mainly heated through the holes 13 and 14 of the circulating metal cap and the filter 16 and through the first passage 12a and the return pipe 2a of FIG. The molten metal is poured as B from the opening 15 of the circulation fitting cap 11 through the filter 16 through the outflow pipe 2b of No. 3 and the first passage 12b of the circulation fitting.

[0006]

However, in such a bath kettle 1, during construction, a worker mounts a paired tube of a forward pipe 2b and a return pipe 2a extending from the appliance body of FIG. In some cases, the forward side and the return side may be connected to the metal fitting 9 in reverse.

[0007] Specifically, at the construction site, the bathtub and the appliance main body may be far apart, and which of the paired tubes extending from the appliance main body is on the outgoing side,
In some cases, it is difficult to tell whether the user is on the return side, and such a misconnection is not uncommon.

For this reason, the first passage 12a of the circulation fitting 9
When the outgoing pipe 2b extending from the instrument body of FIG. 3 is connected and the return pipe 2a is connected to the second passage 12b, FIG.
The flow path shown in FIG. That is, according to FIG. 5, since high-temperature hot water B comes out of the first passage 12a of the circulation fitting 9, a part B1 thereof passes through the filter 16 and contacts the inside of the circulation fitting cap 11, so that the holes 13, 1 are formed.
From 4 go out into the bathtub. However, another part B2 of the high-temperature hot water goes around the inside of the cap 11 and enters the second passage 12b. For this reason, it flows around the circulation pipeline 2 through the return pipe 2a in FIG. 3 without being mixed with the warm water A in the bath tub to lower the temperature.

For this reason, if the pipes are erroneously connected as shown in FIG. 5, when the pump 5 is driven and heated by the heat exchanger 4, the water or hot water in the bathtub is circulated.
Before the temperature of hot water in the bathtub 8 does not rise sufficiently to the set temperature,
As shown in FIG. 7, the temperature of the hot water in the circulation line 2 rises rapidly. Therefore, the thermistor 6 detects the temperature equal to or higher than the set temperature, turns off the burner 3, and cuts off the pump circulation.
There was a problem that so-called premature cutting was caused. Further, in an extreme case, if the thermistor 6 detects an extremely high temperature, for example, a device that performs automatic operation automatically replenishes water, which causes a problem that the water level rises.

This is because, as shown in FIG. 6, even when the pipes are correctly connected, for example, when the user removes the circulation fitting cap 11 for cleaning or the like and makes a mistake when mounting the cap 11 again. A similar problem arises. That is, the circulation fitting cap 11 has its opening 15 (FIGS. 4 and 5).
) Must be mounted at a position corresponding to the second passage 12b. However, as shown in FIG. 6, the opening is not located at a position corresponding to the second passage 12b of the circulation fitting 9, and a part B1 of the high-temperature hot water B from the second passage 12b is used as the circulation fitting cap. 11 and enters the first passage 12a. Therefore, in the bath 1 of FIG.
Similarly to the above, there arises a problem that the heating is stopped before the bath water temperature reaches the set temperature, so that the bath water is prematurely cut off.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can prevent the bath kettle from being prematurely cut off or an abnormal rise in water level in the case of an automatic device.
To provide a method for detecting an abnormality in a bath kettle and a piping system of the bath kettle.
aimed to.

[0012]

SUMMARY OF THE INVENTION According to the first aspect of the present invention, there is provided a burner which connects a tool main body and a bathtub with a circulation pipe and drives a pump to draw water from the bathtub.
For abnormalities in the piping system of a circulation bath that ignites and heats and circulates
Circulating from a bathtub after the burner ignition.
When the return water temperature is monitored and a sudden temperature rise is measured
Abnormality detection of the piping system of the bath kettle to judge that the piping system is abnormal
This is achieved by the exit method . In addition, the above-mentioned object is achieved in claims
According to the second aspect, the instrument body and tub connected by a circulation pipe, while pulling the bath water by driving the pump Bas
Of the piping system of the circulation bath
A normal detection method, wherein the burner is turned off after the circulation heating.
After the fire, monitor the circulating return water temperature from the bathtub and
When the temperature drop is measured, it is determined that the piping system is abnormal.
This is achieved by a method for detecting an abnormality in the piping system of a bath kettle .

[0013] The above object is also achieved by the present invention according to claim 3.
If the instrument body and bathtub are connected by a circulation pipe,
Drive and circulate heat while drawing water in the bathtub,
The first is about the water temperature of the circulation return from the bathtub during the heating circulation.
A temperature detection is performed, and then a bar
Extinguish fire and pump drive to circulate from bathtub
The return water temperature is detected, and the detected value of the first temperature detection is compared with a second value.
Sudden temperature drop is measured by comparing the temperature detection values of
An abnormality in the piping system of the bath kettle, which is judged to be abnormal when set
This is achieved by a detection method . According to a fourth aspect of the present invention, in the configuration of the first to third aspects, the water temperature of the circulation return from the bath is heated until the water temperature reaches a set temperature.

According to the fifth aspect of the present invention, the first to fifth aspects are described.
In any one of the above configurations, the first temperature detection is performed after the water temperature of the circulation return from the bath is heated to a set temperature. The above purpose is
According to the invention of claim 6, the tubing is connected to the bathtub by the circulation pipe.
The main body of the appliance and the water in the bath
Circulation pump for heating the body
Temperature detecting means for detecting the temperature of the water in the tank,
Drive the circulation pump to draw water from the bathtub
After the burner is ignited, the bathtub
Monitors the temperature of the circulating return water from the tank and measures the rapid temperature rise
If it is determined that the piping system is abnormal,
Achieved by Lugama .

According to a sixth aspect of the present invention, there is provided an appliance main body connected to a bathtub by a circulation pipe,
Pull in the water in the bathtub and guide it to the appliance body to heat it
Circulating pump for detecting the temperature of the water in the bathtub
Temperature detecting means for operating the circulating pump.
Move the burner to draw in the water in the bathtub and ignite the burner to heat it
After the ignition, the temperature of the return water temperature from the bathtub is
Output, and a sudden temperature rise occurs during the monitoring of the temperature detection.
This is achieved by the bath kettle, which is configured to judge that it is abnormal when measured . Further, the above object is achieved by the invention according to claim 7 , wherein the appliance main body connected to the bathtub by a circulation pipeline.
Withdrawing the water in the bathtub and leading it to the appliance body
Circulating pump for heating and the temperature of the drawn bathtub water
And temperature detecting means for detecting the temperature.
Drive the pump to ignite the burner while drawing water from the bathtub
After heating and circulating, extinguish the burner
Monitor the temperature of the circulating return water from the bathtub
Judging that the piping system is abnormal when the temperature drop is measured
Achieved by a bath kettle configured . Further, according to the invention of claim 8 , the above object is achieved by connecting a bathtub with a circulation pipe.
With the connected appliance body and the water in the bathtub,
A circulation pump for guiding the heating
Temperature detecting means for detecting the temperature of the water in the bathtub.
Drive the circulation pump to draw water from the bathtub
While circulating heat, return circulation from the bathtub during this heating circulation
The first temperature detection is performed for the water temperature of
The fire is extinguished and the pump
To detect the temperature of the circulating return water from the bath,
By comparing the detection value of the detection with the detection value of the second temperature detection,
Configuration that determines abnormal when a sudden temperature drop is measured
Achieved by the bath kettle.

According to the first aspect of the present invention, when the temperature of the bathtub is detected while the water in the bathtub is drawn into the circulation pipeline and heated, the first connection of the circulation fitting is performed when the piping is reversely connected.
The heated hot water comes out of the passage. A part of it goes around the inside of the cap of the circulation fitting without going out into the bathtub and returns from the second passage to the circulation conduit of the bathtub, so that a high temperature is detected.

Next, when the burner is turned off and the pump circulation is continued, bathtub water which is hardly heated in the bathtub flows into the circulation line. Therefore, since hot water or water having a low temperature flows into the circulation pipeline, an abnormality in the piping system such as incorrect connection of the piping is found due to a rapid temperature drop .
You.

[0018]

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, since the Examples described below are preferred specific examples of the present invention, various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. The embodiment is not limited to these embodiments unless otherwise stated.

FIG. 1 is a block diagram showing a control system used in a preferred embodiment of the present invention, and FIG. 2 is an example of a flowchart specifically showing a method of the present embodiment. Since the present invention is applied to a bathtub having a circulation conduit at least between the appliance body and the bathtub, the system diagram showing the configuration is the same as that shown in FIG. Please refer to FIG. 4 to FIG.

First, an example of a control system used in this embodiment will be described with reference to FIGS.
For example, a pump 5, a water switch 7, a gas valve 3a, a thermistor 6, and a bath remote controller 20 are connected to a control unit 30 set in the appliance body, which is an operating unit and a detection unit of the bath kettle 1. Have been.

The bath remote controller 20 includes an operation switch 21,
The apparatus includes a temperature setting unit 22, a temperature display unit 23, an error display unit 24 to be described later, and the like, and includes a predetermined storage unit.

Next, the method of this embodiment will be described with reference to the flowchart of FIG. With the operation switch of the remote control 20 turned on (STP1), the additional heating switch is turned on (STP2). Here, the control unit 30 confirms data on whether or not the reverse connection of the circulation fitting 9 has been checked in the past (STP3). When a negative result is obtained, the connection of the circulating metal fittings is usually confirmed as a test operation accompanying the construction, so that the pump 5 is driven (STP4).
Wait for the time to draw water from bathtub 8 (STP14)
Confirm that the water switch 7 is turned on (STP5). Here, if the flowing water switch 7 is not turned on even after a certain period of time, the water level of the bathtub 8 is lower than the circulating metal fitting 9 and an error occurs (STP15).

Next, the control unit 30 opens the gas valve 3a, ignites the burner 3 (STP6), and performs a reheating operation. This is performed for a predetermined time, for example, about one minute in the case of the present embodiment (STP7), and the temperature of the hot water passing through the return pipe 2a of the circulation pipe line 2 is detected by the thermistor 6 and stored as T1 (STP15). ).

Next, the control unit 30 closes the gas valve 3a and extinguishes the burner 3 (STP9). At this time, the pump 5 is kept driven. As it is, for a certain time,
In the case of the present embodiment, for example, after the pump has been driven for about 30 seconds (STP10), the temperature of the hot water flowing in the return pipe 2a of the circulation line 2 at that time is detected by the thermistor 6,
This temperature is stored as T2 (STP11).

Further, the control unit 30 compares the detected temperatures T1 and T2, and determines whether the value of T1-T2 is higher than, for example, 2 degrees C (STP1).
2). If a positive result is obtained, it is determined that the circulation fitting 9 is connected in reverse. That is, as described above, the case where the second passage 12b and the first passage 12a of the circulation fitting 9 are not correctly connected to the going pipe 2b and the return pipe 2a of the circulation circuit 2 (see FIGS. 3 and 5). See). With such a connection, the first of the circulation fitting 9
The heated high-temperature water is discharged from the passage 12a of the second passage 12a.
b, and enters the circulation line 2 as it is.

For this reason, the burner is ignited in STP6, the water temperature T1 is detected in about one minute, and thereafter, the burner is stopped and ST
When the temperature is detected for the second time at P11, the temperature T2 indicates the temperature of the water in the bathtub. This is determined in the above example by the fact that a temperature drop of at least about 2 ° C. was recognized.

Therefore, if a positive result is obtained in STP 12, an error is displayed on the display unit 24 of the remote controller 20, and the circulation pipelines 2a and 2b and the circulation fitting 9 are displayed.
Is notified to the installer or the like (STP13). This error may be notified by an alarm such as a buzzer. If a negative result is obtained in STP12, it is determined that the connection between the circulation pipelines 2a, 2b and the respective passages 12a, 12b of the circulation fitting 9 has been well established (STP33), and the process proceeds to STP18 described later.
As described above, the erroneous connection of the circulation fitting 9 is detected.

Next, a method for detecting erroneous mounting of the circulation fitting cap 11 will be described. If the misconnection of the piping has been confirmed in STP3, the construction of the bath kettle is completed, and the user will use the bath kettle for the first time or use it daily thereafter. Accordingly, since the connection of the circulation pipe is correctly performed, if an abnormality such as so-called premature disconnection occurs, the circulation fitting cap 11 is erroneously attached (FIG. 6).

Therefore, in the case where the circulation fitting cap is erroneously attached, the control unit 50 detects the erroneous connection of the pipe in a procedure similar to that for detecting the erroneous connection of the pipe. That is,
The control unit 30 opens the gas valve 3 a while driving the pump 5 to draw and circulate the water in the bathtub into the circulation pipe 2, ignites the burner 3, and reheats the gas to a predetermined temperature set by the remote controller 20 or the like. (STP16, STP17, ST
P18, STP19). Here, it is also confirmed whether or not the bathtub water level is higher than the circulation fitting 9 (STP3).
1, STP32).

Then, the control unit 30 detects the temperature of the hot water in the return pipe 2a of the circulation line 2 and stores the detected value T3 (STP19, STP20). Next, the gas valve 3a is closed, the fire of the burner 3 is extinguished, and the pump is circulated for about 30 seconds in this embodiment (STP2).
1, STP22). Again, the control unit 30 detects the temperature of the hot water in the return pipe 2a of the circulation pipeline 2 and stores the detected value T4 (STP23).

Next, the control unit 30 compares T3 and T4, and if T3-T4 is larger than, for example, twice C, it is determined that the mounting of the circulation fitting cap 11 is defective (STP2).
4). This is because when the mounting position of the circulation fitting cap 11 is not correct, a part of the heated hot water does not come out of the bathtub and returns to the inside of the circulation line 2 as in the case of the incorrect connection of the circulation line (FIG. 6).

Therefore, the control unit 30 notifies the user of the improper mounting of the circulating bracket cap 11 by displaying an error or an alarm on the display unit 24 of the remote controller 20 (STP2).
5) Stop the pump 5 (STP26). Also, STP
If a negative result is obtained in 24, the control unit 30 determines that the hot water in the bathtub has been reheated at the set temperature, stops the pump 5 (STP27), and notifies the boiler or the like of the boiling (STP28). , Enter the heat retention mode for a predetermined time (S
TP29), the detection of the mounting failure of the circulation fitting cap 11 is terminated.

As described above, according to the present embodiment, it is possible to easily detect an erroneous connection of the piping of the bath kettle, which is difficult for the installer to find, and also to easily find a mounting error of the circulation fitting cap. Can be. Therefore, at the time of construction, unlike in the related art, a simple mistake of incorrect connection of the circulating metal fittings is not noticed, and a wasteful situation of misunderstanding the defect of the appliance main body and ending up can easily be avoided.

In addition, the user does not notice the cause of incorrectly attaching the circulating metal cap when cleaning the bath, so that it is possible to prevent a failure of the appliance main body and a situation in which a service person is called in advance. it can.

According to the above-described embodiment, the temperature is detected twice in any case of erroneous connection detection of any of the pipes and in the case of erroneous connection of the circulation fitting cap, and the difference between the detected values is detected. The method of seeking is adopted. However, the present invention is not limited to this, and it is a matter of course that the temperature may be detected after the burner is ignited, and the temperature may be subsequently determined from the temperature change in the temperature rising process after a certain time.

Further, in the above-described embodiment, an example in which the present invention is applied to a normal bath kettle is described. However, the present invention is not limited to a bath kettle having a reheating circulation function. Also, it can be widely applied to things such as automatic driving.

[0038]

As described above, according to the present invention, it is possible to prevent the bath kettle from being prematurely cut off during heating or from causing an abnormal rise in water level in the case of an automatic bath kettle. ,
Abnormalities in the piping system of the bath can be detected .

[Brief description of the drawings]

FIG. 1 is a block diagram showing connection between a control unit of a bath kettle and each element applied to a preferred embodiment of the present invention.

FIG. 2 is a flowchart showing a preferred embodiment of the present invention.

FIG. 3 is a system diagram showing a main configuration of a bath kettle to which the present invention is applied.

FIG. 4 is an essential part cross-sectional view showing a relationship between a circulation fitting normally connected, a circulation fitting cap, and a bathtub.

FIG. 5 is an essential part cross-sectional view showing a relationship between a circulating metal fitting, a circulating metal fitting cap, and a bathtub that are incorrectly connected.

FIG. 6 is a cross-sectional view of a main part showing a relationship between a circulating metal fitting cap, a circulating metal fitting, and a bathtub that are incorrectly mounted.

FIG. 7 is a diagram showing an operation state of the bath kettle when the circulation fitting is incorrectly connected or the circulation fitting cap is incorrectly attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bath kettle 2 Circulation pipe 2a Return pipe 2b Going pipe 3 Burner 3a Gas valve 4 Heat exchanger 5 Pump 6 Thermistor 7 Flow switch 8 Bathtub 9 Circulation fitting 12a First passage 12b Second passage 11 Circulation fitting cap 30 Control Department

Claims (8)

(57) [Claims] 1. An appliance body and a bathtub are connected by a circulation pipe, and a burner is turned on while driving a pump to draw water from the bathtub.
How to detect abnormalities in the piping system of a circulating bath kettle that heats and circulates
A method, after the burner ignition, monitoring the circulation return water temperature from the bath
When a rapid temperature rise is measured, it is determined that the piping system is abnormal.
Characterized by disconnection abnormality detection direction of the pipeline of the bath heater
Law. 2. The apparatus main body and the bathtub are connected by a circulation pipe, and the burner is turned on while driving the pump to draw water from the bathtub.
How to detect abnormalities in the piping system of a circulating bath kettle that heats and circulates
A law, after extinguishing the burner after the circulation heating, from the bath
The return temperature of the circulating water is monitored, and if a sudden decrease in temperature is measured, it is determined that the piping system is abnormal.
Characterized by disconnection abnormality detection direction of the pipeline of the bath heater
Law. 3. An appliance body and a bathtub are connected by a circulation pipe.
Heating and circulating while driving the pump to draw water from the bathtub
And, the circulation return water temperature from the bath during the heating circulation first
The first temperature detection is performed, and then the burner is extinguished as the second temperature detection.
The pump is driven to detect the temperature of the return water from the bathtub
And a detection value of the first temperature detection and a detection value of the second temperature detection.
When a rapid temperature drop is measured by comparing
Characterized by determining that the abnormality detection of the piping system bathtub
How to get out. 4. A water temperature of the circulating return from the tub, characterized in that it is heated to a set temperature, claim 1
4. The method for detecting an abnormality in a piping system of a bath kettle according to any one of claims 1 to 3 . Temperature of 5. The circulation return from the tub, and performing a first temperature detected is heated to a set temperature, bathtub according to claim 3 or 4 For detecting abnormalities in the piping system. 6. An instrument book connected to a bathtub by a circulation line.
Withdraw the body and the water of the bathtub, lead to the appliance body and heat
A circulation pump for, and temperature detection means for detecting the temperature of the bath of water has been drawn
The circulating pump is driven to draw water from the bathtub,
After the burner is ignited, the bathtub
Monitors the temperature of the circulating return water from the tank and measures the rapid temperature rise
That the piping system is judged to be abnormal when
A bath kettle characterized by the following . 7. An instrument book connected to a bathtub by a circulation line.
Withdraw the body and the water of the bathtub, lead to the appliance body and heat
A circulation pump for, and temperature detection means for detecting the temperature of the bath of water has been drawn
The circulating pump is driven to draw water from the bathtub,
The heater circulates and heats and circulates.
After extinguishing the fire, monitor the temperature of the circulating return water from the bathtub.
When the rapid temperature drop is measured,
A bath kettle characterized in that it is configured to judge . 8. An appliance book connected to a bathtub by a circulation line.
Withdraw the body and the water of the bathtub, lead to the appliance body and heat
A circulation pump for, and temperature detection means for detecting the temperature of the bath of water has been drawn
The circulating pump is driven to draw water from the bathtub while heating.
Heat circulates and the water temperature of the circulation return from the bathtub during this heating circulation
For the first temperature detection, and then, as a second temperature detection, extinguish the burner.
The pump is driven to detect the temperature of the return water from the bathtub
And, the ratio of the detected value and the detection value of the second temperature detection of the first temperature detection
Comparison indicates that a sudden drop in temperature is detected as abnormal.
A bath kettle characterized in that it is configured to be cut off .