JP7101502B2 - Bath equipment - Google Patents

Description

The present invention relates to a bath device including a hot water supply unit that supplies hot water to a bathtub and a hot water supply control unit that controls the operation of the hot water supply unit.

For example, in the following Patent Document 1 (Japanese Unexamined Patent Publication No. 2011-200029), in a bath device having an automatic cleaning function of a bathtub, clogging of a cleaning nozzle [31] provided at the bottom of the bathtub [2] is detected. The technology is disclosed.

However, in general, clogging is likely to occur in the drainage channel where the hot water of the bathtub is discharged due to hair, detergent residue, or the like. If the degree of clogging is low, the clogging may be cleared by an individual by cleaning with a commercially available chemical or the like, but there is a problem that it is difficult to notice the clogging of the drainage channel in the first place. If the clogging progresses without being noticed and the degree of clogging becomes high, cleaning by a specialist is often required to clear the clogging.

In order to detect clogging at an early stage, it is conceivable to install a dedicated device for detecting clogging of the drainage channel, such as a flow sensor that detects the flow rate of the drainage channel, but in this case, the structure around the drainage channel is complicated. As a result, the structure of the entire bath device becomes complicated.

Japanese Unexamined Patent Publication No. 2011-200029

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bath device having a simple structure and capable of determining the specific clogging of a drainage channel.

The characteristic configuration of the bath device according to the present invention is
A bath device including a hot water supply unit that supplies hot water to a bathtub and a hot water supply control unit that controls the operation of the hot water supply unit.
The hot water supply unit has a water level sensor that detects the water level of the hot water in the bathtub based on the pressure value of the hot water stored in the bathtub.
The reference pressure value is the pressure value showing a decrease curve detected over time for each elapsed time during the discharge of the hot water in the bathtub in the reference state where the drainage channel from which the hot water in the bathtub is discharged is not clogged. ,
The pressure value actually detected by the water level sensor while the hot water in the bathtub is actually discharged is taken as the actual pressure value.
The hot water supply control unit stores the reference pressure value in advance, and determines the degree of clogging of the drainage channel based on the reference pressure value and the actual pressure value detected during the discharge of hot water. When you run
The actual decrease rate obtained by dividing the amount of decrease in the actual pressure value that has decreased within a preset set time from the start time, which is an arbitrarily determined predetermined starting pressure value, by the set time during the discharge of hot water. The clogging determination process is performed by comparing with the reference reduction rate obtained by dividing the decrease amount of the reference pressure value, which decreases within the set time from the start time, which is the start pressure value, by the set time. Is at the point of executing .

According to this feature configuration, the degree of clogging of the drainage channel can be determined by the water level sensor that detects the water level of the hot water in the bathtub without providing a dedicated device for detecting the clogging of the drainage channel. Therefore, it is possible to determine the degree of clogging of the drainage channel with a simple structure without complicating the structure around the drainage channel.
Further, according to this feature configuration, in order to compare the decrease rate of the reference pressure value in the reference state without clogging and the decrease rate of the actually detected actual pressure value when performing the clogging determination process, clogging is performed. It becomes easy to determine not only the presence or absence of but also the degree of clogging.

Further characteristic configurations of the bath device according to the present invention are
The hot water supply control unit is configured to be able to circulate the hot water stored in the bathtub between the hot water supply unit and the bathtub, and to heat the hot water and supply it to the bathtub again. Being done
The water level sensor is located in a reheating circulation path for circulating hot water between the hot water supply unit and the bathtub.

According to this feature configuration, the water level sensor can be arranged by using the space of the reheating circulation path provided in the bath device having the reheating function, and further, the degree of clogging of the drainage channel is determined by this water level sensor. can do. Therefore, it is possible to prevent the structure of the bath device as a whole from becoming complicated as compared with the case where a dedicated device for detecting the clogging of the drainage channel is newly provided.

Further characteristic configurations of the bath device according to the present invention are
The point is that the notification unit for notifying the user of the determination result by the clogging determination process is further provided.

According to this feature configuration, it is possible to notify the user of the degree of clogging of the drainage channel, and therefore, for example, it is possible to notify the user of the timing when the drainage channel should be cleaned.

Schematic block diagram of bath appliances Control block diagram of bath appliances Explanatory drawing of clogging determination processing which concerns on embodiment Explanatory drawing of clogging determination processing which concerns on 1st reference form Explanatory drawing of clogging determination processing which concerns on 2nd reference form

The bath appliance according to the present invention is configured to be able to automatically fill the bathtub with hot water and to determine the degree of clogging of the drainage channel when the hot water stored in the bathtub is discharged. Hereinafter, embodiments of the bath appliance according to the present invention will be described with reference to the drawings. However, the following embodiment is an example, and the present invention is not limitedly interpreted by this.

1 . Embodiment 1-1. Mechanical configuration of the bath appliance As shown in FIG. 1, the bath appliance 100 includes a hot water supply unit G that supplies hot water to the bathtub 91 of the bathroom 9 and a hot water supply control unit H that controls the operation of the hot water supply unit G. I have. The bathtub 91 is provided with a drainage channel 92 for discharging the hot water stored in the bathtub 91 to the outside.

The hot water supply unit G functions as a heat source, includes a hot water supply heating unit 11 for heating the water supplied from the water supply channel 21, and supplies the water heated by the hot water supply heating unit 11 to the bathtub 91 as hot water. It is configured as follows. Further, the hot water supply unit G heats the reheating circulation path C that circulates the hot water stored in the bathtub 91 with the hot water supply unit G, and the hot water that circulates in the reheating circulation path C. It is provided with a reheating heating unit 12 and is configured to supply hot water heated by the reheating circulation path C to the bathtub 91. In the illustrated example, the hot water supply unit G has a hot water supply passage 31 that connects the hot water supply plug 3 and the hot water supply heating unit 11, and the hot water water heated by the hot water supply heating unit 11 is transferred to the hot water supply plug 3. Is configured to be able to supply.

The hot water supply heating unit 11 has a gas combustion type burner g1, a main heat exchanger 11A arranged in two upper and lower stages, and a latent heat recovery heat exchanger 11B as a latent heat recovery type heat exchanger. .. Similarly to the hot water supply heating unit 11, the reheating heating unit 12 also has a gas combustion type burner g2, a main heat exchanger 12A arranged in two upper and lower stages, and latent heat as a latent heat recovery type heat exchanger. It has a recovery heat exchanger 12B. Although not shown, the combustion exhaust gas after heat exchange by the latent heat recovery heat exchangers 11B and 12B in the hot water supply heating unit 11 and the reheating heating unit 12 is discharged to the outside through the exhaust passage. Further, the acidic condensed water (combustion generated water) generated from the latent heat recovery heat exchangers 11B and 12B is neutralized by the neutralizer and then discharged to the outside.

A water supply bypass path 22 is provided between the water supply channel 21 and the hot water supply channel 31 to connect them. The water supply bypass passage 22 connects the water supply passage 21 and the hot water supply passage 31 so as to bypass the hot water supply heating unit 11. This makes it possible to mix the hot water heated by the hot water supply heating unit 11 with the unheated water supplied to the water supply channel 21.

In the hot water supply passage 31, in order from the upstream side, a mixing valve 32 for adjusting the mixing ratio of the amount of hot water from the hot water supply heating unit 11 and the amount of water from the water supply bypass passage 22 and hot water after being mixed by the mixing valve 32 are provided. A hot water thermistor 33 for detecting the temperature is provided.

A hot water filling path 41 connecting the hot water supply path 31 and the reheating circulation path C is provided. In the present embodiment, the reheating circulation path C includes a bathtub return path 51 and a bathtub outbound path 61, and the above-mentioned hot water filling path 41 includes a hot water supply path 31 and a reheating circulation path. It is connected to the bathtub return path 51, which is a part of C. In the illustrated example, the hot water filling path 41 branches from between the mixing valve 32 and the hot water tap 3 in the hot water supply path 31 and is connected to the bathtub return path 51. The hot water filling check valve 42 is provided in the hot water filling check valve 42, and the backflow from the bathtub return path 51 to the hot water filling path 41 is suppressed by the hot water filling check valve 42.

The hot water supply unit G sucks and reheats the water level sensor 52 that detects the water level of the hot water in the bathtub 91 based on the pressure value V of the hot water stored in the bathtub 91, and the hot water stored in the bathtub 91. It has a reheating circulation pump 54 that circulates in the circulation path C, a return thermistor 53 that detects the temperature of hot water sucked from the bathtub 91, and a water flow switch 55 that detects the water flow. In the present embodiment, the water level sensor 52, the return thermistor 53, and the reheating circulation pump 54 are arranged in the reheating circulation path C for circulating hot water between the hot water supply unit G and the bathtub 91. .. In the illustrated example, the water level sensor 52, the return thermistor 53, the reheating circulation pump 54, and the water flow switch 55 are part of the reheating circulation path C in order from the upstream side with respect to the flow direction from the bathtub 91. It is provided in a return path 51 for a bathtub. The above-mentioned hot water filling path 41 is connected between the reheating circulation pump 54 and the water flow switch 55 in the bathtub return path 51.

1-2. Control configuration of the bath appliance Next, the control configuration of the bath appliance 100 will be described with reference to FIG.

The bath device 100 includes a hot water supply control unit H that controls the operation of the hot water supply unit G. The hot water supply control unit H is composed of a program control type controller equipped with a microcomputer. The hot water supply control unit H is configured to be communicable with the remote controller R operated by the user. In the example shown in FIG. 1, the remote controller R is provided on the wall surface of the bathroom 9. However, without being limited to such a configuration, the remote controller R may be provided outside the bathroom 9, for example, in a kitchen, or may be provided in a plurality of inside and outside the bathroom 9. Although not shown, the remote controller R is provided with an operation switch for instructing the start and stop of operation, an automatic switch for instructing automatic bath operation, a reheating switch for instructing reheating operation, and the like. ..

As shown in FIG. 2, the hot water supply control unit H is configured to be able to acquire information from the remote controller R, the hot water thermistor 33, the forward thermistor 62, the return thermistor 53, and the water level sensor 52. In the present embodiment, the hot water supply control unit H is configured to be able to acquire information from the timer 8 having the time measurement function.

In the present embodiment, the hot water supply control unit H includes an operation control unit H1 and is configured to control the operation (operation) of the hot water supply unit G by the operation control unit H1. The operation control unit H1 controls each device based on the set temperature, the set amount of hot water, and the like input to the remote controller R by the user, and executes the hot water filling process and the reheating process described later.

Here, the bath device 100 according to the present invention is configured so that when the drainage channel 92 is clogged due to, for example, hair or detergent residue, the degree of clogging can be determined. In the present embodiment, the hot water supply control unit H includes a determination unit H2 for determining the degree of clogging of the drainage channel 92, a calculation unit H3 for calculating various values for determining the degree of clogging, and various information and values. It is provided with a storage unit H4 for storing the above.

The storage unit H4 stores the pressure value V for each elapsed time during the discharge of the hot water in the bathtub 91 as the reference pressure value Vi in the reference state where the drainage channel 92 from which the hot water in the bathtub 91 is discharged is not clogged. (See also Figure 3). As described above, the hot water supply control unit H stores the reference pressure value Vi in advance via the storage unit H4. For example, the hot water supply control unit H inherits the pressure value detected by the water level sensor 52 from the predetermined storage amount (initial reference pressure value Vi0) to zero during the test run after the bathtub 91 is installed. I remember it from time to time.

The calculation unit H3 is configured to be able to acquire the pressure value V actually detected by the water level sensor 52 as the actual pressure value Vf while the hot water in the bathtub 91 is actually discharged, and is measured by the timer 8. It is configured to be able to acquire the time information to be performed. Further, the calculation unit H3 is configured to be able to acquire the information stored in the storage unit H4. In the present embodiment, the calculation unit H3 acquires the information of the reference pressure value Vi from the storage unit H4.

In the present embodiment, the operation control unit H1 (hot water supply control unit H) automatically fills the bathtub 91 with hot water according to the operation of the remote controller R by the user, and the hot water stored in the bathtub 91. Is circulated between the hot water supply unit G and the bathtub 91, and the hot water is heated and reheated to be supplied to the bathtub 91 again. When the operation control unit H1 executes the automatic hot water filling process and the reheating process, the amount of hot water supplied to the bath 91 based on the detection value by the water level sensor 52 (water level) becomes the target set amount of hot water, and The valves provided in each water channel and the heating units 11 and 12 are controlled so that the temperature of the hot water becomes the target set temperature based on the detected values of the hot water thermistor 33 and the return thermistor 53.

Then, although the details will be described later, the hot water supply control unit H executes a clogging determination process for determining the clogging condition of the drainage channel 92 based on the reference pressure value Vi and the actual pressure value Vf detected during the discharge of hot water. do. Here, "the degree of clogging of the drainage channel 92" refers to the difficulty in the flow of hot water in the drainage channel 92. The clogging of the drainage channel 92 is caused by, for example, narrowing the flow path by, for example, hair, detergent residue, or the like sticking to the inside of the drainage channel 92.

In the present embodiment, the bath device 100 further includes a notification device 7 that notifies the user of the determination result by the clogging determination process. In the example shown in FIG. 1, the notification device 7 is integrally configured with the remote control device R. In other words, the remote controller R has a notification function of notifying the user of the determination result by the clogging determination process. The notification device 7 has display means, voice vocalization means, and the like, and notifies the user of the determination result by the clogging determination process by these means.
In this case, for example, the notification device 7 may notify the user of the determination result of the clogging determination process at any time, or notify the user of the determination result only at the timing when the drainage channel 92 should be cleaned according to the degree of clogging. You may try to do it. The notification device 7 may be configured to notify the user of the above-mentioned determination result via an information terminal such as a smartphone.

Next, the clogging determination process will be described in detail with reference to FIG. FIG. 3 shows the relationship between the pressure value V detected by the water level sensor 52 and the time T measured by the timer 8, and the vertical axis is the pressure value V and the horizontal axis is the time T. The curve shown by the solid line in the figure is the pressure value V (reference pressure value Vi) in the reference state where the drainage channel 92 is not clogged.
The curve shown by the broken line is the pressure value V (actual pressure value Vf) actually detected by the water level sensor 52. At the reference pressure value Vi0 (initial reference pressure value Vi0) in the figure, hot water is stored in most of the bathtub 91, and the maximum set amount of hot water (for example, 200 liters) is stored in the bathtub 91. It is in a state. Here, the amount of hot water smaller than the maximum set amount of hot water, in other words, the amount of hot water corresponding to the first actual pressure value Vf1, which is smaller than the initial reference pressure value Vi0, is stored in the bathtub 91. The case where the discharge of is started will be described as an example. The reference pressure value Vi and the actual pressure value Vf are equal to each other until immediately before the discharge of hot water starts. That is, the first actual pressure value Vf1 immediately before (or at the start time) the discharge of hot water is started and the corresponding first reference pressure value Vi1 are equal to each other.

The hot water supply control unit H sets the amount of decrease in the actual pressure value Vf (actual decrease amount Rf) reduced within the preset time Ts from the arbitrarily set starting time during the discharge of hot water at the set time Ts. The actual decrease rate obtained by dividing, the reference decrease rate obtained by dividing the decrease amount (reference decrease amount Ri) of the reference pressure value Vi that decreases within the set time Ts from the start time by the set time Ts, and the reference decrease rate. The clogging determination process is executed by comparing. Here, the actual decrease amount Rf, the reference decrease amount Ri, the actual decrease rate, and the reference decrease rate are calculated by the calculation unit H3. Further, here, the starting time is set as "first time T1" which is the time when the discharge of hot water is started.

In the present embodiment, the actual reduction amount Rf is the first actual pressure value Vf1 at the first time T1 when the discharge of hot water is started, and the second actual at the second time T2 after the set time Ts has elapsed from the first time T1. It is calculated by the difference between the pressure value Vf2 and the pressure value Vf2. Further, the reference reduction amount Ri is the difference between the first reference pressure value Vi1 at the time corresponding to the first time T1 and the second reference pressure value Vi2 at the time corresponding to the second time T2 after the set time Ts has elapsed. Calculated by.

The hot water supply control unit H compares the actual decrease rate calculated by the calculation unit H3 with the reference decrease rate by the determination unit H2, and when the actual decrease rate is slower than the reference decrease rate by a predetermined speed, the drainage channel 92 It is judged that there is a tendency for clogging. In the present embodiment, the hot water supply control unit H determines that the drainage channel 92 tends to be clogged when the actual decrease rate is α% or less of the reference decrease rate. In this case, "α%" can be set arbitrarily. For example, "α%" is preferably set to any of the range of 50% to 90%. In this embodiment, "α%" is set to 90%. According to this, it is possible to determine that there is a tendency for clogging in a state where the degree of clogging is not high, that is, in a state where the drainage channel 92 can be cleaned by the individual user.

As described above, the hot water supply control unit H notifies the user of the determination result via the notification device 7 after executing the clogging determination process. For example, the notification to the user may be performed by one or both of the display means and the voice vocalization means.

2. 2. First Reference Form Next, although not included in the scope of rights of the present application, the bath device 100 according to the first reference form will be described with reference to FIG. In the first reference embodiment, the comparison target at the time of executing the clogging determination process is different from the above embodiment . Hereinafter, the points different from the above-described embodiment will be mainly described. The points not particularly described are the same as those in the above embodiment .

In the first reference embodiment, the hot water supply control unit H has the actual pressure value Vf at the time when the preset set time Ts has elapsed from the arbitrarily set starting time during the discharge of hot water, and from the starting time. The clogging determination process is executed by comparing with the reference pressure value Vi at the time when the set time Ts has elapsed. Here, the starting time is set as "first time T1" which is the time when the discharge of hot water is started.

As shown in FIG. 4, in the first reference embodiment, the set time Ts is measured from the first time T1 when the discharge of hot water is started. At the first time T1, the actual pressure value Vf and the reference pressure value Vi are equal to each other. The hot water supply control unit H compares the third actual pressure value Vf3 and the third reference pressure value Vi3 at the second time T2 after the lapse of the set time Ts from the first time T1, and the third actual pressure value Vf3 is the third. 3 When the reference pressure value is larger than Vi3, it is determined that the drainage channel 92 tends to be clogged. In the first reference embodiment, the hot water supply control unit H determines that the drainage channel 92 tends to be clogged when the third actual pressure value Vf3 is β% of the third reference pressure value Vi3. In this case, "β%" can be set arbitrarily. For example, "β%" is preferably set to any of the range of 110% to 150%. In this first reference embodiment, "β%" is set to 110%.

3. 3. Second Reference Form Next, although not included in the scope of rights of the present application, the bath device 100 according to the second reference form will be described with reference to FIG. In the second reference embodiment, the comparison target at the time of executing the clogging determination process is different from the above embodiment . Hereinafter, the points different from the above-described embodiment will be mainly described. The points not particularly described are the same as those in the above embodiment .

In the second reference embodiment, the hot water supply control unit H takes an actual course until the actual pressure value Vf decreases from the arbitrarily set starting pressure value Vc to the preset set pressure value Vs during the discharge of hot water. The clogging determination process is executed by comparing the time Tf with the reference elapsed time Ti required for the reference pressure value Vi to decrease from the calculated pressure value Vc to the set pressure value Vs. Here, the set pressure value Vs can be set to any value. However, if the set pressure value Vs is set too high, such as by setting the maximum set amount of hot water or the pressure value V corresponding to the hot water amount close to this (initial reference pressure value Vi0 or the pressure value V close to this), it will actually be set too high. The amount of hot water stored in the bathtub 91 may be less than the amount of hot water corresponding to the set pressure value Vs before the start of discharging the hot water. Therefore, for example, it is preferable that the set pressure value Vs is set to any one of the range of 20% to 60% of the initial reference pressure value Vi0. According to this, even when the original amount of hot water stored in the bathtub 91 is small, the clogging determination process can be appropriately executed. However, without being limited to the above configuration, for example, the set pressure value Vs may be set to any one of the range of 20% to 60% of the pressure value V at the time when the discharge of hot water is started. ..

As shown in FIG. 5, in the second reference embodiment, the actual pressure value Vf and the reference pressure value Vi are set from the calculated pressure value Vc, with the pressure value V at the start of hot water discharge as the starting pressure value Vc. The elapsed time required to reach the pressure value Vs is measured. In other words, the actual elapsed time Tf and the reference elapsed time Ti are measured from the first time T1 when the discharge of hot water is started. At the first time T1, the actual pressure value Vf and the reference pressure value Vi are equal to each other. In the illustrated example, the actual pressure value Vf is a value equal to the set pressure value Vs at the third time T3. Therefore, the actual elapsed time Tf is the time taken from the first time T1 to the third time T3 when the discharge of hot water is started. The reference pressure value Vi is a value equal to the set pressure value Vs at the second time T2. Therefore, the reference elapsed time Ti is the time taken from the first time T1 to the second time T2 when the discharge of hot water is started. In the second reference embodiment, the hot water supply control unit H determines that the drainage channel 92 tends to be clogged when the actual elapsed time Tf is γ% of the reference elapsed time Ti. In this case, "γ%" can be set arbitrarily. For example, "γ%" is preferably set in the range of 110% to 150%. In this second reference embodiment, "γ%" is set to 110%. In addition to executing the clogging determination process based on the elapsed time Tf and Ti until the actual pressure value Vf and the reference pressure value Vi reach the set pressure value Vs as in the second reference embodiment, the actual pressure value Vf And, the clogging determination process may be executed based on the pressure decrease rate until the reference pressure value Vi becomes the set pressure value Vs.

4. Other Embodiments Next, other embodiments of the bath device 100 will be described.

(1) In each of the above embodiments, an example of executing the clogging determination process with reference to the first time T1 at which the discharge of hot water is started has been described. However, the present invention is not limited to such an example, and the clogging determination process may be executed based on the time T during the discharge of hot water. In other words, the clogging determination process may be started while the hot water is being discharged. Specifically, the starting time (first time T1) may be set at any time after the start of discharging hot water. In this case, the clogging determination process may be executed by comparing the actual pressure decrease rate and the reference pressure decrease rate, which decrease from the first time T1 to the second time T2 after the set time Ts has elapsed. Further, the clogging determination process may be executed by comparing the actual pressure value Vf at the second time T2 with the reference pressure value Vi in this case. Specifically, a predetermined starting pressure value Vc is set as an arbitrary pressure value V after a predetermined time has elapsed from the start of discharging hot water, and the actual pressure value Vf and the reference pressure value Vi are set pressures from the starting pressure value Vc. The elapsed time Tf and Ti required to reach the value Vs may be measured, respectively. In other words, the elapsed time required from the time when the actual pressure value Vf becomes the starting pressure value Vc to the set pressure value Vs after the predetermined first time elapses from the first time T1 when the discharge of hot water is started. Set pressure value Vs from the time when the reference pressure value Vi becomes the starting pressure value Vc after the second time (time different from the above first time) elapses from the first time T1 when the discharge of Tf and hot water is started. The clogging determination process may be executed by measuring the elapsed time Ti required until the time becomes equal to or comparing the two elapsed times.

(2) In the above embodiment, an example in which the clogging determination process is executed based on the pressure value V itself detected by the water level sensor 52 has been described. However, without being limited to such an example, the clogging determination process may be executed based on the amount of hot water (or water level) corresponding to the pressure value V. In addition, the above-mentioned actual reduction amount Rf and reference reduction amount Ri may be calculated based on the amount of hot water converted into the pressure value V. Then, the actual decrease rate and the reference decrease rate are calculated based on the actual decrease amount and the reference decrease amount calculated in this way. Further, for example, the set pressure value Vs in the third embodiment may be converted into the set amount of hot water to execute the clogging determination process.

(3) The configuration disclosed in each of the above-described embodiments can be applied in combination with the configurations disclosed in other embodiments as long as there is no contradiction. With respect to other configurations, the embodiments disclosed herein are merely exemplary in all respects. Therefore, various modifications can be appropriately made without departing from the spirit of the present disclosure.

INDUSTRIAL APPLICABILITY The present invention can be used for a bath device including a hot water supply unit that supplies hot water to a bathtub and a hot water supply control unit that controls the operation of the hot water supply unit.

100: Bath device 7: Notification device 8: Timer 21: Water supply channel 22: Water supply bypass path 52: Water level sensor 91: Bathtub 92: Drainage channel C: Reheating circulation path G: Hot water supply section H: Hot water supply control section Tf : Actual elapsed time Ti: Reference elapsed time Ts: Set time V: Pressure value Vf: Actual pressure value Vf1: First actual pressure value Vf2: Second actual pressure value Vf3: Third actual pressure value Vi: Reference pressure value Vi1: 1st reference pressure value Vi2: 2nd reference pressure value Vi3: 3rd reference pressure value Vs: set pressure value Vc: starting pressure value

Claims (3)

A bath device including a hot water supply unit that supplies hot water to a bathtub and a hot water supply control unit that controls the operation of the hot water supply unit.
The hot water supply unit has a water level sensor that detects the water level of the hot water in the bathtub based on the pressure value of the hot water stored in the bathtub.
The reference pressure value is the pressure value showing a decrease curve detected over time for each elapsed time during the discharge of the hot water in the bathtub in the reference state where the drainage channel from which the hot water in the bathtub is discharged is not clogged. ,
The pressure value actually detected by the water level sensor while the hot water in the bathtub is actually discharged is taken as the actual pressure value.
The hot water supply control unit stores the reference pressure value in advance, and determines the degree of clogging of the drainage channel based on the reference pressure value and the actual pressure value detected during the discharge of hot water. When you run
The actual decrease rate obtained by dividing the amount of decrease in the actual pressure value that has decreased within a preset set time from the start time, which is an arbitrarily determined predetermined starting pressure value, by the set time during the discharge of hot water. The clogging determination process is performed by comparing with the reference reduction rate obtained by dividing the decrease amount of the reference pressure value, which decreases within the set time from the start time, which is the start pressure value, by the set time. A bath device that runs . The hot water supply control unit is configured to be able to circulate the hot water stored in the bathtub between the hot water supply unit and the bathtub, and to heat the hot water and supply it to the bathtub again. Being done
The bath device according to claim 1, wherein the water level sensor is arranged in a reheating circulation path for circulating hot water between the hot water supply unit and the bathtub . The bath device according to claim 1 or 2, further comprising a notification unit for notifying the user of the determination result by the clogging determination process .

Images