JPH10267403A - Combustion equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide combustion equipment which can fill a bathtub with hot water, and can automatically set a setting water level within a water-level range that enables taking a bath comfortably. SOLUTION: When filling a bath in a memory mode, a hot-water feed detecting means 28 obtains the hot-water feed rate from starting to fill an empty bathtub with hot water until reaching a predetermined reference water level that is upper side from an opening-formed position of a passage for filling the bath, based on a flow rate detecting means 19. A cross-sectional area detecting means 32 obtains the cross-sectional area of the bathtub, based on the variation in the water level of a water-level sensor 13 for the variation in the hot-water feed rate, and a reference water-level detecting means 36 obtains the height from the bottom of the bathtub to the reference water-level, based on said hot-water feed rate and the cross-sectional area. A setting water-level automatic determination part 34 sets the position that is upper than the reference water-level by the portion of the preset value as the lowest setting water- level, and the position that is lower than the height of the top of the pre-given bathtub by the portion of the preset value as the highest setting water level. The water-level range from the lowest setting water level to the highest setting water level is divided in the predetermined number, and this dividing position is set as the preset water level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus having a filling function for automatically filling a bathtub.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a water heater (apparatus) having a hot water filling function, which is a combustion device having a hot water filling function for a bathtub. The water heater includes a hot water supply heat exchanger 5 as a heat source device and a hot water supply burner 4 for burning and heating the hot water supply heat exchanger 5.
And a reheating burner 6 for burning and heating the reheating heat exchanger 7, one end of a water supply passage 11 is connected to an inlet of the hot water supply heat exchanger 5, The other end of the water supply passage 11 is guided to a water supply source via an external pipe. One end of a hot water supply passage 12 is connected to the outlet side of the hot water supply heat exchanger 5, and the other end of the hot water supply passage 12 is guided to a hot water supply place such as a kitchen or a shower through an external pipe.

One end of the reheating heat exchanger 7 is connected to one end of an outgoing pipe 20, and the other end of the outgoing pipe 20 is connected to an opening formed in the inner surface of the bathtub (bath) 1 by a circulation fitting. 2 and the outgoing pipe 20 is in communication with the bathtub 1. The other end of the reheater 7 is connected to one end of a passage 17, the other end of the passage 17 is connected to the discharge port of the circulation pump 18, and returns to the suction port of the circulation pump 18. One end of the pipe 15 is connected, and the other end of the return pipe 15 is connected to an opening formed on the inner surface of the bathtub 1 by using the circulation fitting 2, and the return pipe 15 communicates with the bathtub 1. I have.
The return pipe 15, the circulation pump 18, the passage 17, the reheating heat exchanger 7, and the forward pipe 20 constitute the reheating circulation path 14.

A pouring passage 21 is provided for communicating the hot water supply passage 12 with the passage 17, and a pouring control valve 24 for opening and closing the passage is provided in the pouring passage 21. 21 is provided with a water level sensor 13 for detecting the water level of the bathtub 1 using water pressure, and a flow rate detecting means 19 for detecting the flow rate of flowing water in the passage.

[0005] Incidentally, reference numeral 8 shown in the figure is a tapping thermistor for detecting the temperature of the hot water produced by the hot water supply heat exchanger 5,
Reference numeral 9 denotes a bath temperature sensor for detecting the temperature of the hot water in the reheating circulation passage 14 as the temperature of the hot water in the bathtub 1.
Reference numeral 16 denotes a water flow sensor for detecting water flow, and reference numeral 16 denotes a water flow sensor for detecting water flow in the reheating circulation passage 14.

[0006] The water heater is provided with a control device 25 for controlling the operation of the appliance, and a remote control 26 is connected to the control device 25. Remote controller 26 has hot water supply setting means for setting hot water supply temperature, bath temperature setting means for setting bath temperature, bathtub water level selecting means for selecting a bathtub water level from a plurality of predetermined set water levels, and the like. Are formed.

A sequence program for performing various operation controls such as hot water supply, hot water filling, reheating, and the like is predetermined in the control device 25. The control device 25 includes sensor outputs of the various sensors and a remote controller 26. And information on the hot water supply set temperature and the like set therein, and controls the appliance operation such as hot water supply, hot water filling and reheating according to the sequence program based on the received information.

For example, a hot water tap (not shown) of a kitchen, a shower, or the like is opened, hot water in the hot water supply passage 12, the hot water supply heat exchanger 5, and the water supply passage 11 flows out. When the sensor 10 detects, the hot water supply burner 4 starts burning, the combustion capacity is controlled so that hot water at the hot water supply set temperature set on the remote controller 26 is discharged, and the water supply to the hot water supply heat exchanger 5 is controlled. The hot water is heated by the heat of the combustion flame of the hot water to produce hot water, and this hot water is supplied to the hot water supply passage 12.
To a desired hot water supply location via the. Then, when the hot water tap is closed and the stop of water flow is detected by the water amount sensor 10, the combustion of the hot water burner 4 is stopped to prepare for the next hot water supply.

When filling in the execution mode, the pouring control valve 24 is opened, and the hot water produced in the hot water supply heat exchanger 5 in the same manner as above is supplied to the hot water supply passage 12 and the hot water supply passage 21.
Are sequentially flown into the reheating circulation path 14, and are poured into the bathtub 1 through two paths, a path leading to the bathtub 1 through the reheating heat exchanger 7 and a path leading to the bathtub 1 through the circulation pump 18. 4, relational data (hereinafter referred to as PQ data) between the water amount and the water level (water pressure) detected by the water level sensor 13 as shown in FIG.
And when it is determined that the bathtub water level has reached the bathtub set water level selected by the bathtub water level selection means based on the sensor output of the water level sensor 13 and the pouring control valve 24 is closed,
The hot water supply burner 4 is stopped from burning, and the hot water filling operation is terminated.

Further, when performing the reheating operation, the circulating pump 18 is driven to return the bath water to the return pipe 15, the circulating pump 18, the passage 17, the reheating heat exchanger 7, and the outgoing pipe 20.
Are sequentially passed back to the bathtub 1 to recirculate the bathtub water, start the combustion of the reburning burner 6, and recirculate the hot and cold water in the reheating heat exchanger 7 using the heat of the combustion flame of the reburning burner 6. Heating is performed to reheat the bathtub water, and when it is determined that the hot water temperature detected and output by the passage 17 has reached a predetermined bath temperature, the reburning burner 6 stops burning and the circulation pump 18 stops. To end the reheating operation.

[0011]

By the way, the setting of the set water level is based on the formation position of the circulation fitting 2 (that is, the formation position of the opening formed on the inner side surface of the bathtub 1) as described below. There are known a method of setting a set water level by using a method and a method of setting a set water level based on the bottom surface of the bathtub 1.

In the conventional method of setting the set water level based on the position where the circulation fitting 2 is formed, for example, FIG.
As shown in the figure, a position above the upper end position Ps of the circulation fitting 2 by a predetermined value d 2 is set as a set water level Pa, a position above this position by a predetermined value Da is set as a set water level Pb, The interval from the upper end position of the circulating metal fitting 2 to the minimum set water level and the interval between each of the plurality of set water levels are set in advance such that the position above the position by a predetermined value Db is set as the set water level Pc. A plurality of set water levels are set based on these intervals and the upper end position of the circulation fitting 2.

In the conventional method of setting the set water level based on the bathtub bottom surface, for example, as shown in FIG. 7, a position above the bathtub bottom surface at a height hs is defined as a minimum set water level Pa, and a predetermined water level is determined from that position. The height from the bottom of the bathtub to the lowest set water level, such as setting the position above the set value Da by the set water level Pb and setting the position above the position by the predetermined value Db above the set water level Pc, Are set in advance, and a plurality of set water levels are set based on the intervals and the bottom of the bathtub.

However, since the position at which the circulation fitting 2 is formed differs from bathtub 1 to the bathtub 1, for example, as shown in FIG. When the set water level is determined by the setting method based on the position, the set water level (P
e) or a set water level (Pd) determined to be almost equal to the upper end of the bathtub may occur.

In such a case, when a set water level higher than the upper end of the bathtub is selected, there arises a problem that hot water overflows from the bathtub 1 during filling, and a set water level substantially equal to the upper end of the bathtub is selected. If the bathtub water level is too high when a person enters the bathtub, problems such as overflowing of a large amount of hot water will occur, so use the set water level above the top of the bathtub or the set water level near the top of the bathtub. In many cases, the number of set water levels that can be selected is reduced.

As shown in FIG. 7, when the setting position of the circulation fitting 2 is high and the set water level is determined by the setting method based on the bathtub bottom, the position is determined to be lower than the formation position of the circulation fitting 2. There is a possibility that a set water level to be set or a set water level (Pa) set at a position where the circulation fitting 2 is formed.
When the set water level (Pa) of the formation position of the circulation fitting 2 is determined, the water level cannot be detected by the water level sensor 13, so that it is difficult to fill the set water level with the water. Since the reheating of the bathtub hot water cannot be performed, a set water level lower than that of the circulating metal fitting 2 or a set water level of the position where the circulating metal fitting 2 is formed cannot be used. For this reason, there is a problem that the number of selectable water levels is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a combustion apparatus capable of determining a set water level so that a predetermined number of set water levels can all be selected. Is to do.

[0018]

Means for Solving the Problems In order to achieve the above object, the present invention has the following structure to solve the above problems. That is, in the first invention, a hot water passage is provided which communicates with a heat source device from an opening formed on the inner surface of the bathtub, and hot water produced by the heat source device is poured into the bathtub through the hot water passage. In a combustion device provided with a hot water filling function of filling hot water to a selected water level among a plurality of predetermined set water levels, a water level sensor that is provided in the hot water path and detects a bathtub water level using water pressure. ;
A flow rate detecting means provided in the bathing passage for detecting a flow rate of flowing water in the passage; when filling in the storage mode, after the bathtub water level rises above the position of the bathtub opening of the bathing passage, A cross-sectional area detection unit for obtaining a cross-sectional area of the bathtub based on a change in the water level detected by the water level sensor; a reference water level higher than the opening forming position by a predetermined amount after the start of pouring into the empty bathtub; A pouring water amount detecting section for detecting the amount of pouring water until the temperature reaches the above-mentioned flow rate detecting means; a bathtub based on the detected pouring water amount and the cross-sectional area of the bathtub obtained by the cross-sectional area detecting section. A reference water level detector for calculating a height from the bottom to the reference water level;
A position lower by a predetermined value than the height of the bathtub upper end given in advance is set as the highest set water level, a position higher than the reference water level by a predetermined value is set as the lowest set water level, and the minimum set water level is set. A set water level automatic determination unit that divides a set water level range from a set water level to a highest set water level higher than the lowest set water level into a predetermined number, and automatically sets those division break positions as set water levels. Is a means for solving the above problem.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the change rate of the water level change amount with respect to the water amount change amount in a predetermined water level region near the reference water level, and the vicinity of the maximum set water level Bathtub upper end setting data for setting the height from the bathtub bottom surface to the bathtub upper end in combination with the change rate of the water level change amount with respect to the water amount change amount in the predetermined water level region is given in advance, and the storage mode At the time of hot water filling, the change rate near the reference water level and the maximum setting based on the relation data between the bathtub water level and the pouring water amount created based on the water level detected and output by the water level sensor and the flow rate detected by the flow rate detecting means. The above problem is solved by determining a change rate in the vicinity of the water level and providing a bathtub upper end height setting unit for setting a value of the height of the bathtub upper end based on the obtained change rate and the bathtub upper end setting data. It is set to resolve means.

In the invention having the above structure, for example, when filling in the storage mode, the cross-sectional area detecting section detects the cross-sectional area of the bathtub, and the pouring water amount detecting section is poured from the bottom of the bathtub until the reference water level is reached. Detects the amount of pouring water, and the reference water level detector
The height from the bottom of the bathtub to the reference water level is detected based on the above determined amount of pouring water and the cross-sectional area of the bathtub.

The set water level automatic determination unit determines, as a maximum set water level, a position lower than a predetermined height of the upper end of the bathtub by a predetermined value, and sets the position higher than the reference water level by a predetermined value. Determine the position as the minimum setting water level,
The set water level range from the lowest set water level to the highest set water level is divided into a predetermined number, and the division break position is determined as the set water level.

As described above, since the minimum set water level is always determined to be above the opening forming position of the hot water passage, the water level is not set below the opening forming position. The above-described problem that the set water level is determined at a position that cannot be used because it is difficult to add hot water is avoided. Further, since the highest set water level is determined to be lower than the upper end of the bathtub, the problem that the set water level is set above the upper end of the bathtub as described above is avoided.

That is, the minimum and maximum set water levels are determined within a water level range in which hot water is available and suitable for comfortable bathing. In addition, since the remaining set water levels are determined within the set water level range from the above-mentioned lowest set water level to the highest set water level, naturally, these set water levels can be filled with water, and a water level range suitable for comfortable bathing. , And it is possible to determine all the predetermined number of set water levels at selectable positions.

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

The combustion apparatus of the first embodiment has the system configuration shown in FIG. 5, and FIG. 1 shows a control configuration characteristic of this embodiment. Since the description of the system configuration shown in FIG. 5 has been described above, a duplicate description thereof will be omitted.

The control device 25 which is characteristic in this embodiment comprises a pouring water amount detecting section 28 as shown by a solid line in FIG.
, Combustion control unit 30, cross-sectional area detection unit 32, and data storage unit 3
3, a set water level automatic determination unit 34, a reference water level determination unit 35, and a reference water level detection unit 36. The combustion control unit 30 is provided in advance with a sequence program for controlling appliance operation such as hot water supply, hot water filling, and reheating, and the combustion control unit 30 receives information on the various sensor outputs and the remote control 26. The information is fetched and the appliance operation is controlled according to the sequence program.

The flow rate detecting means 19 is provided in the pouring water amount detecting section 28.
The pouring water amount calculation formula data for obtaining the pouring water amount into the bathtub based on the flow rate detected by the above is given in advance, and the pouring water amount detecting unit 28 captures the operation information of the combustion control unit 30. When it is detected that a command to start filling in the storage mode is issued based on the information, the flow rate detected by the flow rate detecting means 19 is detected every moment, and based on the flow rate and the pouring amount calculation formula data, Then, the flow rate after the filling in the storage mode is started (that is, after the pouring of the water into the empty bath tub) is integrated to detect the amount of the pouring water after the start of the filling.

The reference water level determination unit 35 is provided with the combustion control unit 30
When it is detected that the command to start filling in the storage mode is issued based on the information, the pouring water amount detected by the pouring water amount detecting unit 28 is monitored,
The first water amount A shown in FIG. 2 where the pouring water amount is predetermined (for example,
When the pressure reaches 40 liters, a filling signal is output to the combustion control unit 30 to interrupt the filling operation of the combustion control unit 30. Then, the reference water level determination unit 35 drives the circulation pump 18 to confirm that the water flow sensor 16 does not detect the passage of water through the reheating circulation passage 14.

The reference water level determination unit 35 outputs a filling water resumption signal to the combustion control unit 30 to cause the combustion control unit 30 to resume filling, and based on the detected pouring water amount of the pouring water amount detecting unit 28, refills the filling water. When it is later detected that a predetermined second amount of water B (for example, 10 liters) has been poured, a filling suspension signal is output to the combustion control unit 30 again to cause the combustion control unit 30 to suspend filling. The circulation pump 18 is driven, and it is monitored whether or not the water flow sensor 16 detects the passage of water through the reheating circulation passage 14.

When the water flow sensor 16 does not detect the flow of water, the operations of pouring the second water amount B, driving the circulation pump 18 and monitoring the sensor output of the water flow sensor 16 are sequentially performed in the same manner as described above. The reference water level determination unit 35 calculates the second water amount B
The operation of the pouring of the water and the operation of driving the circulation pump 18 and monitoring the sensor output of the water flow sensor 16 are repeated until the water flow sensor 16 detects the flow of water through the reheating circulation passage 14.

The recirculating passage 1 by the water flow sensor 16
4 is detected, the reference water level determination unit 35 determines that the bathtub water level is at the water level Ps shown in FIG. 2 above the opening (circulation fitting 2) formed on the inner surface of the bathtub 1,
Further, a predetermined third water amount C (for example, 15 liters) is poured, and the water level Psh shown in FIG. 2 after the pouring is determined as the reference water level.

The pouring water amount detecting section 28 fetches the operation information of the reference water level determining section 35 and reaches the reference water level Psh from the bottom of the bathtub when detecting that the reference water level Psh is determined based on the information. Until the reference water level detector 3 detects the pouring water amount Qsh
6 is output.

The cross-sectional area detecting section 32 detects the sensor output of the water level sensor 13 as the bathtub water level every moment and fetches the operation information of the reference water level determining section 35, and when the bathtub water level is the water level Ps and the reference water level Psh. Water level sensor 13
Water level Ps and reference water level Ps respectively detected and output by
The sectional area (opening area) S of the bathtub 1 is calculated based on h, the third water amount C, and an arithmetic expression given in advance to the data storage unit 33 and expressed by the following expression (1). The sectional area S is output to the reference water level detector 36.

S = C / (Psh−Ps) (1)

The data storage unit 33 stores the amount of pouring water Qsh from the bottom of the bathtub to the reference water level Psh and the cross-sectional area S of the bathtub.
Based on the above, the reference water level detection calculation formula data shown in the following equation (2) for obtaining the height Hsh shown in FIG. 2 from the bottom of the bathtub to the reference water level Psh is given in advance.

Hsh = Qsh / S (2)

When the reference water level detecting section 36 receives the pouring water amount Qsh from the pouring water amount detecting section 28 and the cross-sectional area S from the cross-sectional area detecting section 32, respectively, the reference water level detecting arithmetic expression is obtained from the data storage section 33. The data is read out, the height Hsh of the reference water level Psh is calculated by substituting the pouring water amount Qsh and the cross-sectional area S into the reference water level detection calculation formula data, and the calculated height Hsh of the reference water level Psh is the set water level. Automatic determination unit 34
Is output to

When receiving the height Hsh of the reference water level Psh from the reference water level detector 36, the automatic setting water level determination unit 34 is higher than the height Hsh of the reference water level Psh by the predetermined lower limit constant D1. The position is set as the minimum set water level Plw shown in FIG.

The data storage section 33 stores the height Hjt from the bottom of the bathtub to the top of the bathtub. The height Hjt of the bathtub upper end is substantially the same regardless of the type of bathtub, and is determined in advance, and can be given to the data storage unit 33. The set water level automatic determination unit 34 reads the height Hjt of the bathtub upper end from the data storage unit 33, and determines a position lower than the height Hjt of the bathtub upper end by a predetermined upper limit constant D2 in FIG.
Is set as the maximum set water level Phi shown in FIG.

After setting both the highest set water level Phi and the lowest set water level Plw as described above, the set water level automatic determination unit 34 sets the lowest water level within the set water level range from the lowest set water level Plw to the highest set water level Phi. A predetermined number of set water levels other than the set water level Plw and the highest set water level Phi are set as follows. For example, a numerical value K of the set water level to be set (a numerical value including the lowest set water level Plw and the highest set water level Phi), or
Give a value obtained by subtracting 1 from the number K of set water levels,
The width Dlh of the set water level range is divided by the number obtained by subtracting 1 from the number K of the set water levels, and the interval d between the set water levels is obtained.
(D = Dlh / (K-1)), and the above minimum set water level P
Each set water level is determined for each interval d from lw.

Specifically, the height Hjt of the upper end of the bathtub is 55c.
m, the lower limit constant D1 for obtaining the minimum set water level Plw is 1
0cm, upper limit constant D2 for obtaining the maximum set water level Phi
Is set in advance to 5 cm, the number K of set water levels to be determined is set to 6 water levels, and the height Hsh of the reference water level Psh is set to 15 c
m, the lower limit constant D1 is added to the height Hsh of the reference water level Psh (Hsh + D1 = 15 +
10), the minimum set water level Plw is determined at a position 25 cm above the bottom of the bathtub.

Further, the upper limit constant D2 is subtracted from the height Hjt of the bathtub upper end (Hjt-D2 = 55-5), and the maximum set water level Phi is determined at a position 50 cm above the bathtub bottom surface. Then, the width Dlh of the set water level from the lowest set water level Plw to the highest set water level Phi is divided by the number obtained by subtracting 1 from the number K of the set water levels to obtain an interval d between each set water level.

D = Dlh / (K-1) = (Phi-Plw) /
(K-1) = (50-25) / (6-1) = 5

As described above, the interval d between each set water level is 5
cm, and the minimum set water level Plw
, The set water level is determined for each interval d. That is, the interval from the reference water level Psh to each set water level is set as follows. First set water level (minimum set water level Plw): 1
0 cm, second set water level: 15 cm, third set water level:
20 cm, fourth set water level: 25 cm, fifth set water level: 30 cm, sixth set water level (highest set water level Phi):
It is determined to be 35 cm.

The set water level automatic determination unit 34 stores the data of each set water level determined as described above in the data storage unit 33.

According to this embodiment, the maximum set water level Phi can be set below the upper end of the bathtub.
Unlike the conventional case, the set water level is not determined above the upper end of the bathtub, and the conventional problem that the set water level above the upper end of the bathtub is selected and the hot water overflows from the bathtub at the time of filling the water is surely avoided. be able to. Also, by setting the upper limit constant D2 for obtaining the maximum set water level Phi so that the set water level is not determined at a position where the bath overflows when the bather takes a bath, Problems such as overflow of hot water can be prevented. In this manner, the highest set water level Phi can be determined within the water level area where comfortable bathing is possible.

Furthermore, since the minimum set water level Plw can be set above the opening of the bathtub 1 (circulation fitting 2), the set water level is determined at a position where it is difficult to perform additional heating or filling with hot water. Can be avoided.

Further, the remaining set water levels other than the lowest set water level Plw and the highest set water level Phi are determined within the set water level range from the lowest set water level Plw to the highest set water level Phi, so that hot water filling and reheating can be performed. Moreover, it is possible to determine all the predetermined number of set water levels in an appropriate bathtub water level area where a bather can take a bath comfortably,
As a result, the problem that the number of set water levels that can be selectively set as in the related art decreases can be reliably suppressed.

Hereinafter, a second embodiment will be described. What is characteristic in the second embodiment is that the first embodiment
In addition to the configuration of the embodiment, the height Hjt from the bottom of the bathtub to the top of the bathtub is automatically set. In the description of this embodiment, the description of the parts common to the first embodiment has been described above, and thus the duplicated description will be omitted.

By the way, there are various types of bathtubs 1,
These various bathtubs 1 are roughly classified into three types: a Western type shown in FIG. 3A, a Japanese-Western mixed type shown in FIG. 3B, and a Japanese type shown in FIG. 3C. be able to. The above two types, the Western style type and the Japanese-Western style type,
The height Hjt at the upper end of the bathtub is substantially equal, for example, 55 cm. In addition, the height Hjt of the bathtub upper end of the Japanese style type is higher than that of the two types, for example, 58 cm to 6 cm.
0 cm.

As described above, since the height Hjt at the upper end of the bathtub varies depending on the type of the bathtub 1, in this embodiment,
The height Hjt at the upper end of the bathtub is variably set for each type of bathtub 1 so that the set water level can be determined so that the bather can take a bath more comfortably.

The above-mentioned Western-style and Japanese-Western style tub 1
The cross-sectional area (opening area) of the bathtub increases from the bottom of the bathtub to the top of the bathtub, and the present inventors have found that the bathtub cross section of the Japanese-style bathtub 1 is almost equal from the bottom of the bathtub to the top of the bathtub. I paid attention.

By the way, the control device 25 shown in this embodiment is provided with a PQ data creation unit 31 shown by a chain line in FIG. 1, and the PQ data creation unit 31 At this time, based on the bathtub water level detected by the water level sensor 13 and the amount of pouring water obtained by the flow rate detecting means 19, the PQ as shown in FIGS.
It has a configuration to create data (relationship data between water level and water volume) as follows.

For example, the PQ data creation unit 31 fetches each operation information of the combustion control unit 30 and the reference water level determination unit 35, and based on the information of the combustion control unit 30, a command to start filling in the storage mode is issued. After detecting that the reference water level Psh has been determined by the reference water level determination unit 35, the sensor output of the water level sensor 13 indicating the reference water level Psh and the bathtub calculated by the pouring water amount detection unit 28 The pouring water amount Qsh from the bottom to the reference water level Psh is taken in.

Further, the PQ data creation section 31 supplies the sensor output (water level Ps1) of the water level sensor 13 when a predetermined amount of water R (for example, 30 liters) is poured from the reference water level Psh and the pouring. The water volume Qs1 is taken in. The water level Ps1 and its pouring water amount Qs1 are stored in the PQ data creation section 31.
Based on the above reference water level Psh and the pouring water amount Qsh, P-up to the A water level region shown in FIGS.
A water level area PQ creation data for creating Q data is given in advance, and the PQ data creation unit 31 determines the water level Ps1 and its pouring water amount Qs1 and the reference water level Psh and its pouring water. The water amount Qsh and the A water level region PQ
Based on the created data, A shown in (a) and (b) of FIG.
Create PQ data up to the water level area.

Further, the PQ data creation unit 31 stores the water level Ps1 and the amount of pouring water Qs1 and the water level Ps1.
B water level area for creating PQ data of the B water level area shown in FIGS. 4A and 4B based on the water level Ps2 and the pouring water amount Qs2 above it by a predetermined value. PQ creation data is given in advance, and the PQ data creation unit 31 determines the water level Ps1 and the pouring water amount Qs1.
4 (a) and (b) in FIG. 4 based on the water level Ps2 above the water level Ps1 by a predetermined value and the pouring water amount Qs2 thereof and the B water level area PQ creation data. Create PQ data of the water level area.

The PQ data creation section 31 stores the PQ data created as described above in the data storage section 33, and the combustion control section 30 sets the PQ data at the time of filling in the execution mode.
Filling is performed based on the data and the sensor output of the water level sensor 13.

Based on the PQ data created as described above, it can be determined whether or not the cross-sectional area at the upper end of the bathtub is wider than the cross-sectional area at the bottom of the bathtub. That is, the change rate of the water level change amount with respect to the water amount change amount, that is, the slope of the PQ data shown in FIG. 4 corresponds to the bathtub cross-sectional area, and the bathtub cross-sectional area decreases as the change rate decreases. Is narrower, and conversely, the bathtub cross-sectional area becomes wider as the rate of change increases. Focusing on this, the present inventor has devised a control configuration that sets the height Hjt of the upper end of the bathtub in accordance with the change amount of the change rate near the upper end of the bathtub with respect to the change rate near the reference water level Psh.

The control device 25 shown in this embodiment is different from the control configuration and the PQ data creation unit 31 shown in the first embodiment in that a bathtub top height setting unit shown by a dotted line in FIG. 38 are provided.

The bathtub upper end height setting section 38 includes the combustion control section 30.
The PQ data created by the PQ data creation unit 31 is stored in the data storage unit 33 after detecting that the command to start the filling of the storage mode has been issued based on the information. From the reference water level Psh
A predetermined water level region in the vicinity (in this embodiment,
A change rate M1 of the water level change amount with respect to the water amount change amount in the A water level region and the water level change amount with respect to the water amount change amount in a predetermined water level region (in this embodiment, the B water level region) near the highest set water level Phi. Change rate M2 and P
-Determined based on Q data.

The data storage unit 33 stores a change rate M1 near the reference water level Psh and a change rate M2 near the maximum set water level Phi.
The bathtub upper end setting data for obtaining the height from the bathtub bottom surface to the bathtub upper end is given in advance by the combination with the above.

The bathtub top height setting section 38 refers to the bathtub top setting data in the data storage section 33, and sets the height Hjt of the bathtub top by referring to the obtained change rates M1 and M2. For example, as shown in FIG. 4A, when the rate of change M1 near the reference water level Psh is substantially equal to the rate of change M2 near the maximum set water level Phi, the bathtub cross-sectional area near the reference water level Psh is the highest. Since it is determined that the bathtub cross-sectional area in the vicinity of the set water level Phi is substantially equal, it can be determined that the bathtub 1 of the Japanese style has a bathtub cross-sectional area that is substantially equal from the bottom of the bathtub to the upper end of the bathtub. , The height of the upper end of the bathtub of the Japanese style which is predetermined is set as the height Hjt of the upper end of the bathtub.

As shown in FIG. 4B, the maximum set water level Phi is higher than the change rate M1 near the reference water level Psh.
When the rate of change M2 in the vicinity is small, it can be determined that the bathtub cross-sectional area near the maximum set water level Phi is wider than the bathtub cross-sectional area near the reference water level Psh, so the bathtub cross-sectional area becomes wider from the bathtub bottom to the bathtub top. It can be determined that the bathtub 1 is the Western-style or Japanese-Western style bathtub 1. In such a case, the height of the predetermined Western-style or Japanese-Western style bathtub is set as the height Hjt of the bathtub upper end.

As described above, the set height Hjt of the bathtub upper end is stored in the data storage unit 33, and the set water level automatic determination unit 34 determines the first height Hjt of the bathtub based on the set height Hjt of the bathtub upper end. As shown in the embodiment, the highest set water level Phi is determined.

According to this embodiment, in addition to the configuration of the first embodiment, a bathtub upper end height setting section 38 is provided, so that the hot water is filled in the same manner as in the first embodiment. And reheating can be performed, and it is of course possible to obtain the effect that a predetermined number of set water levels can always be determined within a water level range in which a bather can comfortably take a bath. That is, it is possible to automatically set the height Hjt of the bathtub upper end corresponding to the type of bathtub to which the combustion equipment is connected, so that the bath level can be more comfortably taken by a bather. The set water level can be determined.

Of course, the difference between the heights of the upper ends of various bathtubs is as small as, for example, about 3 cm. Therefore, the height Hjt of the upper end of the bathtub is not set for each bathtub by providing a bathtub upper end height setting section 38, and the When the height Hjt of the bathtub upper end based on the height of the bathtub upper end is given as a constant, determine the set water level in a water level area where hot water filling and reheating can be performed and a comfortable bathing can be performed. Can be.

It should be noted that the present invention is not limited to the above embodiments, but can take various embodiments. For example, in the above embodiments, the set water levels are set at equal intervals, but the intervals between the set water levels may not be equal.
In such a case, the interval setting data for determining the interval between the set water levels is given in advance, and based on the interval setting data, the minimum set water level Plw obtained as described above and the highest set water level The set water level range up to Phi is divided, and the division break position is determined as the set water level.

More specifically, for example, the number of set water levels is determined to be 6 water levels, and interval setting data is given. The interval setting data is calculated from the first set water level (minimum set water level Plw) obtained as described above. The ratio of the interval between each set water level to the width Dlh of the set water level range up to the 6 set water levels (the highest set water level Phi) is, for example, 3/10, 2/5, 1 from the bottom of the bathtub.
/ 10, 1/10, 3/10, etc., the given water level width Dlh is 25c
m, the width of the set water level range Dlh
Is multiplied by the respective interval ratios. From this calculation, the interval between each set water level is 7.5 cm, 5 cm, 2.5 cm from the bottom of the bathtub.
cm, 2.5 cm, and 7.5 cm, and the position 7.5 cm above the first set water level is higher than the second set water level and the second set water level based on the obtained intervals between the set water levels. As the position above 5cm is the third set water level,
The set water level is determined.

In each of the above embodiments, the bathtub cross-sectional area is calculated by calculation. For example, table data, graph data, and the like for obtaining the bathtub cross-sectional area based on a combination of the amount of pouring water and the change in water level are used. The cross-sectional area formed by the flow rate detection means 19, the sensor output of the water level sensor 13, and the cross-sectional area data are obtained in advance by a method other than the calculation. Good.

In each of the above embodiments, the height Hsh from the bottom of the bathtub to the reference water level Psh is calculated, but, for example, the amount of pouring water from the bottom of the bathtub to the reference water level Psh, the cross-sectional area of the bathtub, and the like. The reference water level height data formed by table data, graph data, and the like for obtaining the height Hsh of the reference water level Psh is provided in advance by the combination of the reference water level Psh, and the reference water level is detected from the bathtub bottom detected by the flow rate detecting means 19. The height Hsh from the bathtub bottom surface to the reference water level Psh may be obtained by a method other than the calculation based on the pouring water amount up to Psh, the bathtub cross-sectional area, and the reference water level height data.

In the first embodiment, the height Hjt of the upper end of the bathtub and the upper limit constant D2 are given in advance.
The set water level automatic determination unit 34 has obtained the maximum set water level Phi by subtracting the upper limit constant D2 from the height Hjt at the upper end of the bathtub, but the height Hjt at the upper end of the bathtub and the upper limit constant D2 are predetermined numerical values. Therefore, the maximum set water level Phi may be obtained in advance by subtracting the upper limit constant D2 from the height Hjt of the upper end of the bathtub, and the obtained maximum set water level Phi may be given in advance to the data storage unit 33 or the like.

Further, in the second embodiment, the change in the water level change amount with respect to the water amount change amount near the reference water level corresponding to the cross-sectional area near the reference water level and the cross-sectional area near the maximum set water level, respectively. The height Hjt of the bathtub top according to the type of bathtub was set based on the rate and the rate of change of the water level change relative to the water change near the maximum set water level. As an example, the highest setting water level Phi
Bathtub upper end setting data for setting the height Hjt of the bathtub upper end is determined and given in advance by a combination of the bathtub cross-sectional area in the vicinity and the bathtub cross-sectional area in the vicinity of the reference water level Psh, and the bathtub cutoff near the maximum set water level Phi is given. The area is obtained, and the height Hjt of the bathtub upper end is set based on the obtained bathtub cross-sectional area, the bathtub cross-sectional area near the reference water level obtained by the cross-sectional area detector 32, and the bathtub upper end setting data. Is also good.

Further, in each of the above embodiments, the water heater as shown in FIG. 5 has been described as an example. However, the present invention is not limited to the water heater as shown in FIG. The present invention can be applied to any combustion device provided with a hot water passage that leads to a hot water filling function for hot water filling a selected set water level among a plurality of predetermined water levels. For example, the water heater shown in FIG. 5 is provided with a reheating heat exchanger 7, a reheating burner 6, and a reheating circulation passage 14, and has a reheating function in addition to the hot water supply function and the hot water filling function. However, the present invention can also be applied to combustion equipment having a hot water filling function without a reheating function.

In the water heater shown in FIG. 5, the water level sensor 13 is provided in the pouring passage 21, but the water level sensor 13 is provided in any location of the hot water supply passage from the hot water supply heat exchanger 5 to the bathtub. For example, the return pipe 15 of the hot water passage may be used.
Or on the outward pipe 20.

Further, in each of the above embodiments, the flow rate detecting means 19 is provided separately from the water flow rate sensor 10, but the sensor capable of detecting the flow rate is replaced by the water flow rate sensor 1
When it is provided as 0, the water amount sensor 10 may function as flow rate detecting means. In this case, the flow rate detecting means 19 can be omitted. Furthermore, although the hot water supply heat exchanger 5 is provided as a heat source device, the present invention can be applied to a combustion device provided with a heat source device such as an electric water heater instead of the hot water supply heat exchanger 5. it can.

[0076]

According to the present invention, the cross-sectional area detecting section, the pouring water amount detecting section, the reference water level detecting section, and the set water level automatic determining section are provided. Based on the bathtub cross-sectional area obtained by the above, based on the pouring water amount from the bathtub bottom to the reference water level obtained by the pouring water amount detection unit, the height from the bathtub bottom to the reference water level can be obtained by the reference water level detection unit, The set water level automatic determination unit can determine the lowest set water level at a position above the reference water level based on the obtained reference water level height. Since the reference water level is predetermined at a position above the opening forming position of the hot water passage, the minimum setting water level is necessarily set at a position above the opening forming position, so the opening forming position It is possible to avoid the problem that the set water level is determined at a position below which hot water cannot be filled.

Further, since the set water level automatic determination unit determines the maximum set water level at a position lower than a predetermined height of the bathtub upper end, the set water level is determined at a position above the bathtub upper end. Therefore, the problem that the set water level above the upper end of the bathtub is selected and the hot water overflows from the bathtub at the time of hot water filling can be reliably avoided. Further, the maximum set water level can be set at a position where the bath can be prevented from overflowing when the bather takes a bath.

As described above, hot water filling is possible, and
The lowest setting water level and the highest setting water level higher than the lowest setting water level can be determined within a bathtub water level range where a bather can take a comfortable bath, and the setting water level from the lowest setting water level to the highest setting water level Since the other set water levels are determined in the range, all of the predetermined number of set water levels can be set within the bathtub water level range in which the above-mentioned bathing can be performed comfortably. Problems can be avoided reliably.

In the case where the bathtub top height setting section is provided, the height of the bathtub top differs depending on the type of bathtub, and the rate of change of the water level change with respect to the water change near the reference water level. The height of the bathtub upper end according to the type of the bathtub can be given in advance as the bathtub upper end setting data by combining with the change rate of the water level change amount with respect to the water amount change amount near the maximum set water level. The change rate in the vicinity of the reference water level and the change rate in the vicinity of the highest set water level are obtained, and the height of the bathtub upper end is determined according to the obtained change rate and the bathtub connected to the combustion equipment based on the bathtub upper end setting data. The water level can be variably set, and the set water level can be set at a position where a bather can take a bath more comfortably.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a characteristic control configuration in each of the embodiments.

FIG. 2 is an explanatory diagram illustrating a method of setting a set water level shown in each of the embodiments.

FIG. 3 is an explanatory diagram showing types of bathtubs.

FIG. 4 is a graph showing an example of relation data between water level and water amount.

FIG. 5 is an explanatory diagram showing an example of a system configuration of a combustion device.

FIG. 6 is an explanatory diagram illustrating an example of a conventional setting method for setting a set water level based on a position where an opening of a hot water passage is formed.

FIG. 7 is an explanatory diagram showing an example of a conventional setting method for setting a set water level based on a bathtub bottom surface.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 bath tub 2 circulation fitting 5 hot water supply heat exchanger 12 hot water supply passage 13 water level sensor 14 reheating heating circulation passage 19 flow rate detection means 28 pouring water quantity detection unit 32 cross-sectional area detection unit 34 automatic setting water level determination unit 36 reference water level detection unit 38 top of bath tub Height setting section

Claims (2)

[Claims] 1. A bathing passage communicating with a heat source through an opening formed on an inner surface of a bathtub, wherein hot water produced by the heat source is poured into the bathtub through the bathing passage, and is predetermined. In a combustion device having a hot water filling function of filling hot water to a selected water level among a plurality of set water levels,
A water level sensor provided in the water filling passage for detecting a bathtub water level using water pressure; flow rate detecting means provided in the water filling passage to detect a flow rate of flowing water in the passage; A cross-sectional area detecting section for calculating a cross-sectional area of the bathtub based on a change in water level detected by a water level sensor with respect to the amount of pouring water after the bathtub water level rises above the position where the bathtub opening of the passage is formed; A pouring water amount detector for detecting, based on the flow rate detecting means, a pouring water amount from when the hot water is started until a reference water level higher than the opening forming position by a predetermined amount is reached; A reference water level detector for calculating a height from the bottom of the bathtub to the reference water level based on the water amount and the cross-sectional area of the bathtub obtained by the cross-section detector; a predetermined height higher than a predetermined height of the upper end of the bathtub; Is A position lower by the value is set as the highest set water level, a position higher by a predetermined value than the reference water level is set as the lowest set water level, and from the lowest set water level to the highest set water level higher than the lowest set water level A setting water level automatic deciding section for dividing the set water level range into a predetermined number and automatically setting those division break positions as the set water level. 2. A change rate of a water level change amount with respect to a water amount change amount in a predetermined water level region near a reference water level, and a water level change with respect to a water amount change amount in a predetermined water level region near a maximum set water level. Bath tub top setting data for setting the height from the bath tub bottom to the bath tub top according to the combination with the rate of change of the amount is given in advance, and the water level and the flow rate detected and output by the water level sensor when filling in the storage mode are set. Based on the relationship data between the bathtub water level and the pouring water amount created based on the flow rate detected by the detection means, the change rate near the reference water level and the change rate near the highest set water level are obtained, and the obtained change rates are 2. The combustion apparatus according to claim 1, further comprising a bathtub upper end height setting section for setting a value of the height of the bathtub upper end based on the bathtub upper end setting data.