JP3171127B2 - Automatic washing tub - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water jet type automatic washing tub.

[0002]

2. Description of the Related Art Scale is attached to the inner wall surface of a bathtub, and the place where the scale is most strongly attached includes a position where a waterline obtained when a standard amount of hot water is poured into the bathtub is in contact with the inner wall surface of the bathtub. It is near the top and bottom. Therefore, in the bathtub washing performed after bathing or before filling with hot water, it is necessary to sufficiently wash a portion mainly on the vicinity of the waterline on the wall surface.

As a conventional automatic washing bath, as shown in FIGS. 8 and 9, the armrest a ₂ to a lower half portion was swelled inside of the side wall portions a ₁ right and left tub a, the upper in the side wall portion a ₁ of the right and left in an intermediate position between the flange portion a ₃ that is outwardly flared formation in the periphery, while each provided with a plurality of cleaning nozzles b in parallel, side walls of the bathtub a portion a ₁
And a pipe e for supplying a cleaning liquid is set up in a relatively narrow space d between the concrete block and the waist wall c,
A structure in which a cleaning nozzle b is connected to an upper end of the pipe e via a fixed joint f is provided (for example, see Japanese Utility Model Laid-Open No. 5-68475).

[0004] By injecting toward the draft surface g of the tub side wall portion a ₁ facing the cleaning liquid from each of the cleaning nozzles b, collide with the inner surface of the side wall portions a ₁ in the vicinity of draft surfaces g,
Cleaning is performed by removing scales adhering to the inner wall of the bathtub a.

[0005]

[SUMMARY OF THE INVENTION Incidentally, as described above, what configuration the cleaning nozzle b is provided on the side wall portion a ₁ of the right and left tub a, and route the piping e along its side wall a ₁ Since the tip must be connected to the cleaning nozzle b, the piping e
Not the lead-out only takes trouble, since numerous cleaning nozzles b in a state of being exposed directly to the inner surface of the side wall portion a ₁ of the bathtub a, appearance is poor, also these cleaning nozzles during bathing Get in the way by hitting your upper body.

Therefore, in the prior art, Japanese Patent Application Laid-Open No.
As disclosed in Japanese Patent No. 88, a rotary washing nozzle is provided at a plurality of locations on the bottom of the bathtub so as to be able to move up and down in a vertical direction, and at the time of washing the bathtub, the washing nozzle is raised and protruded from the inner bottom surface of the bathtub. Thereafter, there is also provided an apparatus in which a cleaning liquid is sprayed, and when the cleaning is not performed, the cleaning nozzle is lowered so as not to protrude from the inner bottom surface of the bathtub and stored in the bottom of the bathtub.

[0007] With this configuration, the piping is relatively easy to route, the appearance during non-washing is good, and the inconveniences such as the obstruction of these washing nozzles during bathing are eliminated.

[0008] However, when the washing nozzle is configured to be able to move up and down, it is necessary to ensure sufficient long-term waterproofness so that hot water in the bathtub does not leak during non-washing. And it is difficult to guarantee long-term reliability.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and ensures reliable washing of a bathtub, relatively easy piping, and good appearance when not washed. It is another object of the present invention to provide a highly reliable automatic washing tub that does not disturb these washing nozzles during bathing and guarantees long-term waterproofness.

[0010]

The automatic cleaning bath according to the present invention has the following structure to solve the above-mentioned problems.

That is, in the invention according to claim 1,
At the bottom of the bathtub, a cleaning nozzle that sprays cleaning liquid is arranged,
Each cleaning nozzle has a flat shape so that its head approximately matches the size of the slip pattern, which is the unevenness of the anti-slip formed on the bottom surface of the bathtub, and is located on substantially the same plane as the bottom surface of the bathtub. Is formed.

In the invention according to claim 2, a washing nozzle for injecting a washing liquid is disposed at the bottom of the bathtub, and the spray nozzle of the washing nozzle is arranged such that a waterline obtained when a standard amount of hot water is poured into the bathtub is flush with the inner wall surface of the bathtub. The spray angle is set such that the cleaning liquid is sprayed over the entire circumference of the bathtub while covering the vicinity of the upper and lower portions including the contact position.

[0013] According to the third aspect of the present invention, in the configuration of the first or second aspect, a plurality of cleaning nozzles are arranged in series in the longitudinal direction of the bathtub at intervals.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of a water jet type automatic washing tub according to this embodiment, and FIG. 2 is a cross-sectional view of the bath tub shown in FIG. FIG. 3 shows FIG.
FIG. 3 is a cross-sectional view taken along line YY of FIG.

The automatic washing tub 2 of this embodiment is an integrally molded product having a substantially gourd shape in plan view, and a flange portion 2b is formed to project outward from an upper end portion of the peripheral wall 2a. Armrests 2c are formed on the inner left and right side surfaces. Further, the bathtub 2 is formed with a bottom portion 2d that is flat from the back side in the longitudinal direction and a seat portion 2e that protrudes upward from the bottom portion 2d on the foot side.

In the center of the inner surface of the flat bottom portion 2d of the bathtub 2, a number of slip patterns 2g, which are non-slip irregularities, are formed. A cleaning nozzle 4 for injecting a cleaning liquid is disposed at one location, and a drain plug 7 is provided at one location.

As shown in FIG. 4, each of the cleaning nozzles 4 includes a main body 6 and a vortex generating nozzle guide 8 fitted inside the main body 6.

The main body 6 has a dish-shaped head 6a and a cylindrical body 6b.
It is formed in a flat shape so as to substantially match the size of g and to be located on substantially the same plane as the inner surface of the bottom 2d of the bathtub. The head 6a is provided with an injection port 6c for the cleaning liquid communicating with the inside of the body 6b, and a hexagonally-shaped fitting recess 6d of a tightening tool is provided outside the injection port 6c.
Further, draining grooves 6e are formed radially from four places of the fitting recess 6d.

As described above, since the cleaning nozzle 4 has a shape similar to the slip pattern 2g, there is no sense of incongruity and the appearance is good. In addition, since they hardly protrude from the bottom 2d of the bathtub 2, these washing nozzles 4 do not hinder the bathing.

The shape of the injection port 6c of the cleaning nozzle 4 is set so as to satisfy the following conditions.

That is, in FIGS. 1 to 3, only the position at the center of the jetting range of the cleaning liquid jetted from each of the cleaning nozzles 4 is indicated by the symbol A, but the range in which the cleaning liquid is actually jetted is shown in FIG. In addition, the flush line obtained when a standard amount of hot water is poured into the bathtub main body 2 covers the upper and lower portions including the position in contact with the peripheral wall 2a of the bathtub main body 2 so that the cleaning liquid is uniformly applied over the entire circumference of the bathtub main body 2. . In this case, the injection angle θ is set to, for example, θ ≒ 85 ° in consideration of the above points.

In FIG. 4B, in order to set the injection angle θ so that the actual injection is near the waterline, the injection wide angle of the nozzle 4 is set to θ + α. Since the cleaning liquid to be sprayed has adhesiveness, a desired spray angle θ can be obtained by forming a nozzle wider by α degrees as θ + α.

On the outer periphery of the body 6b of the washing nozzle 4, a thread 6f for fastening the washing nozzle 4 to the bottom 2d of the bathtub 2 is formed.

On the other hand, the nozzle guide 8 has, for example, four insertion guide legs 8b protruding along the axial direction from the disk-shaped bush 8a. A water flow groove 8c for vortex generation is formed inclining from the direction.

The water guide groove 8c of the nozzle guide 8
When the cleaning liquid passes through the main body 6
Is sprayed from the injection port 6c, so that the hot water and the detergent are efficiently mixed, and in combination with the appropriate setting of the above-mentioned injection angle θ, excessive foaming due to the detergent is suppressed and the bathtub 2 is discharged. Since the jet is swiftly jetted to the inner peripheral wall 2a, the cleaning ability is enhanced.

Reference numeral 10 denotes a fume nozzle for ejecting hot water mixed with air bubbles, 12 denotes a pipe connected to the fume nozzle 10, 14 denotes a suction port for circulating hot water, and 16 denotes a pipe communicating with the suction port 14. , 18 are pipes connected to the washing nozzle 4.

FIG. 5 is a configuration diagram showing the entirety of an automatic bath apparatus provided with the automatic cleaning bath 2 according to the present invention.

This automatic bath apparatus includes the above-mentioned automatic washing bath 2 and a bath kettle 20 with a water heater, a detergent supply section 80, and a controller 100 for controlling the overall operation of these sections.

The bath kettle 20 with a water heater has a hot water circuit 30,
It has a reheating circuit 50 and a bath drop circuit 70.

The hot water supply circuit 30 is for heating the incoming water from the water supply and supplying hot water to the automatic washing bath 2 and a not-shown curan, and has a heat exchanger 31. The water passage 32 and the hot water passage 33 are connected by a bypass passage 34, and an electromagnetic opening / closing bypass valve 35 is provided in the middle of the bypass passage 34. In addition, the water inlet channel 32 is provided with a water amount sensor 37 for detecting the amount Qc of water entering the heat exchanger 2 and a temperature sensor 38 for detecting the incoming water temperature Tc. Body temperature sensor 40 for detecting the temperature of hot water from the tank, water amount servo valve 41 for controlling the amount of hot water, and hot water temperature sensor 42 for detecting the temperature of hot water after the water from the bypass 8 has been mixed.
Is provided.

On the other hand, the reheating circuit 50 is for reheating while circulating the hot and cold water in the automatic washing bath 2 and is provided with a heat exchanger 51 for reheating, and the suction passages 5 before and after the heat exchanger 51.
2 and the discharge path 53 are connected by a bypass path 54, and an electromagnetic opening / closing bypass valve 55 is provided in the middle of the bypass path 54.
Is provided. Further, a water level sensor 57 for detecting the water level of the bathtub 2, a circulating pump 58 for forced circulation, a midway of a suction passage 52 having one end connected to the suction port 14 of the bathtub 2,
Water flow switch 6 for detecting the presence or absence of water entering the heat exchanger 51
0, a temperature sensor 61 for detecting the temperature of hot water in the bathtub 2 and an on-off valve 62 for opening and closing the suction passage 52 are sequentially arranged.
The discharge passage 53 is branched into two in the middle, one of the discharge passages is connected to the above-mentioned pipe 12 communicating with the blast nozzle 10 via a three-way valve 65, and the other discharge passage is opened and closed for cleaning. It is connected to a pipe 18 communicating with the cleaning nozzle 4 via a valve 67 and a detergent supply section 80 described later.

Further, the bath drop circuit 70 connects the hot water supply circuit 30 and the reheating circuit 50 to supply hot water to the bathtub 2.
, The electromagnetic opening and closing type drop valve 71,
A water amount sensor 72 for detecting a drop amount and a check valve 73 are sequentially provided.

The detergent supply section 80 is provided with a detergent storage tank 8.
1. An on-off valve 82 for opening and closing a detergent supply path connected to the storage tank 81, and a flow of hot water supplied from the discharge path 53 to the pipe 18 to generate a negative pressure to supply the detergent to the pipe 1.
8 has a venturi 83 for drawing in.

Reference numeral 90 denotes an air pipe connected to the blast nozzle 10 for suctioning air, 91 denotes a check valve provided in the middle of the pipe 90, and 93 denotes whether or not a bathtub lid is placed on the bathtub 2. Sensor 95 for detecting the drainage plug 7
It is an electromagnetic on-off valve that opens and closes.

On the other hand, the controller 100 includes a control main body 101 composed of, for example, a microcomputer;
It comprises a kitchen remote control device 102 installed in a kitchen or the like, and a bathroom remote control device 103 installed in a bathroom.

The control main unit 101 includes input data from the remote controllers 102 and 103 and various sensors 37, 38, and 4 provided in the bath 20 with a water heater.
0,..., Each valve 35, 41, 6
, The circulating pump 58, and the like, and also controls the combustion of a burner (not shown) for the heat exchangers 31, 51.

The remote controllers 102 and 103 are used to input various commands to the control main unit 101. For example, regarding the kitchen remote controller 102,
As shown in FIG. 6, an operation switch 104 for activating the apparatus, a bath automatic operation switch 105 for automatically filling the bathtub 2 with water, switches 107 and 108 for cleaning the bathtub 2 are arranged on the operation panel. In addition, a display unit 109 for displaying hot water temperature at the time of hot water supply is provided. In this embodiment, when the standard cleaning switch 107 is pressed for a short time, the “standard cleaning mode” is set.
Is set for a long time (for example, 5 seconds or more), the "conservative cleaning mode" is set, and when the switch 108 for the conservative cleaning is pressed, the "conservative cleaning mode" is set.

Next, in the automatic bath apparatus having the above configuration,
The operation when performing bathtub cleaning will be mainly described with reference to the flowchart shown in FIG.

Now, for example, the kitchen remote controller 102
When one of the cleaning switches 107 or 108 is operated (step 1), the control body 10
1 determines whether or not the automatic bath operation switch 105 and the reheating switch (not shown) of the bathroom remote controller 103 are operated (step 2).

If these switches are operated, it is determined that the bath is in use, the cleaning mode is canceled, and a message indicating that the bath is in use is displayed on the display unit 109 (step 3). . On the other hand, when another switch such as the bath automatic operation switch 105 is not operated, the control main body 101 places the bathtub lid on the bathtub 2 based on the detection output of the lid sensor 93. It is determined whether or not there is (step 4).

If the bathtub lid is not placed, a message indicating that the bathtub lid should be placed is displayed on the display unit 109 (step 5), and the process returns to step 4. If the bathtub lid is already placed on the bathtub 2, the on-off valve 95 is opened so that hot water is constantly drained from the drain plug 7 (step 6). It is determined whether or not the elapsed time T exceeds a preset maximum drainage time _TMAX (step 7). Maximum drainage time T _MAX for this case, the the bathtub 2 open drain plug 7 from the full state, was determined by adding an additional margin time to the time required to complete the hot water from the bath 2 is drained For example, T _MAX is set to 10 minutes.

If the maximum drainage time T _MAX has elapsed in step 7, it is determined that the remaining water in the bathtub 2 has been completely drained, and the process proceeds to step 10. If the maximum drainage time _TMAX has not elapsed in step 7, it is subsequently determined whether or not there is residual water in the bathtub 2 based on the detection output of the water level sensor 57 (step 8).

[0043] When the detection output of the water level sensor 57 is turned off, then it determines whether the elapsed time T from the time point exceeds the predetermined time T ₀ set in advance (step 9). The predetermined time T _{0 in} this case is determined in consideration of the time required from when the residual water in the bathtub 2 falls below the water level detectable by the water level sensor 57 to when the residual water is completely drained from a drain pipe or the like. It has been determined, and is set, for example, to T ₀ = 3 minutes.

If the predetermined time T ₀ has not yet elapsed in step 9, the process returns to step 7. On the other hand, if the predetermined time T ₀ has elapsed, it is determined that there is no remaining water in the bathtub 2, and the mode shifts to the preliminary rinsing mode. (Step 10).

In the preliminary rinsing mode, the control main unit 1
01, first, the bypass valve 35 of the hot water supply circuit 30 of the bath kettle 20 with a water heater is closed, the drop valve 71 of the drop circuit 70 is opened, and 62 and 55 are closed. Also, the hot and cold discharge path 53
The three-way valve 65 in the middle of the process is closed to stop the discharge of hot water to the blast nozzle 10, while the opening / closing valve 67 for the washing nozzle 4 is opened, and the opening / closing valve 82 of the detergent supply section 80 is closed.

Then, the water from the water inlet 32 of the hot water supply circuit 30 flows through the heat exchanger 31 and the hot water outlet 33, and further flows through the dropping circuit 70 to the heat exchanger 5 of the reheating circuit 50.
1 is supplied. At this time, based on both detection outputs of the water amount sensor 41 of the hot water supply circuit 30 and the water amount sensor 71 of the drop circuit 70, the control main body unit 101 always sends the water to the additional heating circuit 50 side even when a curl (not shown) is used. Constant water volume
(For example, 5 liters / minute), the opening of the water amount servo valve 41 is adjusted, and the heat exchanger 31 of the hot water supply circuit 30 is heated to thereby obtain a predetermined temperature (for example, 48
(° C) is controlled so that hot and cold water is discharged from here.

In this way, the hot and cold water that has flowed out of the bath kettle 20 with the water heater reaches the venturi 83 from the discharge passage 53 through the cleaning on-off valve 67, but the on-off valve 82 of the detergent supply section 80 is closed. Only the fuel is injected from the cleaning nozzle 4 through the pipe 18. As a result, the scale attached to the peripheral wall 2a of the bathtub 1 is preliminarily washed. Also, by this, when spraying detergent because the bathtub is wet on one side,
Since the detergent easily spreads over the entire surface and the bathtub surface is warmed prior to the detergent, the cleaning effect of the detergent can be improved.

The state of the preliminary cleaning is a predetermined time T
_{After 1} (for example, 2.5 minutes) has elapsed (step 11), the control main unit 101
After determining whether the mode is the “standard cleaning mode”, the “conservative cleaning mode”, or the “elaborate cleaning mode” (Step 1)
2) Adjust the degree of opening of the water amount servo valve 41 to set a predetermined amount of water (for example, 15 liters / minute) from the side of the bath kettle 20 with the water heater.
And the on-off valve 82 of the detergent supply unit 80 is opened.

Thus, the detergent stored in the storage tank 81 is mixed with the hot water by the negative pressure generated when the hot water from the bath kettle 20 with the water heater passes through the venturi 83, and then passes through the pipe 18. It is injected from the cleaning nozzle 4. As a result, the scale that has adhered to the peripheral wall 2a of the bathtub 1 is washed by the washing liquid containing the detergent.

Here, predetermined times Ta, Tb, and Tc (where Ta <Tb <Tc) are set according to the settings of the “conservative cleaning mode”, the “standard cleaning mode”, and the “thorough cleaning mode”.
During this time, the injection of hot and cold water mixed with the detergent from the washing nozzle 4 is continued (steps 13, 14, 15). As the predetermined time in this case, for example, Ta = 7 seconds, Tb = 16 seconds, T
c = 32 seconds is set.

Then, any of the above cleaning times Ta,
After Tb and Tc have elapsed, in order to prevent the hot and cold water in the pipe 18 from flowing back into the detergent tank 81, the on-off valve 82 of the detergent supply unit 80 is first closed, and then the on-off valve 71 of the drop circuit 70 is closed. temporarily stopping the injection of the cleaning liquid from the nozzle 4 (step 16) and waits until the predetermined time T ₂ has elapsed in this state (step 17). The waiting time T ₂ are, in which the detergent is sufficiently penetrate the dross, and the cleaning liquid is determined by taking into account the time to penetrate the entire inner wall of the flow down tub 2 side walls of the tub 2, for example, T ₀ = 2 minutes. By doing so, the parts that are very dirty can be sprayed directly to remove the dirt, and the other parts are cleaned by using the flowing down of the cleaning agent. Can do.

Next, the control main unit 101 shifts to the rinsing mode (step 18). Since the cleaning operation in the rinsing mode is the same as that described in step 10, the detailed description is omitted here.

After the bath tub cleaning in the rinsing mode is continued for a predetermined time T ₃ (for example, 3 minutes) (step 19), the cleaning on-off valve 67 is closed, while a predetermined time (for example, 10 seconds) is set. ) Only to open the three-way valve 65 so that a small amount of hot water is discharged from the blast nozzle 10 so that the cleaning liquid does not remain on the seat 2e of the bottom 2a of the bathtub 2.
(Step 20). Thereafter, the cleaning on-off valve 67 is closed. This ends the cleaning operation.

As another related operation, an automatic bath dropping operation will be described. When the bath automatic operation switch 105 is operated and the automatic washing bath 2 is automatically filled with hot water, the three-way valve 65 is opened, so that hot and cold water supplied from the hot water supply circuit 30 of the bath kettle 20 with the hot water supply is provided. Is poured into the bathtub 2 from the fumarolic nozzle 10 through the drop circuit 70 and the reheating circuit 50 and further through the discharge path 53.

When a reheating switch (not shown) of the bathroom remote controller 103 is operated, the circulating pump 58 of the reheating circuit 50 of the bath kettle 20 with the water heater is started, and the bypass valve 55 is closed. Since the heat exchanger 51 is heated by the burner, the hot water in the bathtub 2 is circulated and reheated.

Further, when an unillustrated squirt operation switch of the bathroom remote control device 103 is operated, the circulating pump 58 of the reheating circuit 50 of the bath kettle 20 with water heater is started, and the on-off valve 62 is closed. Since the bypass valve 55 is opened, while the hot and cold water in the bathtub 2 is circulated, the hot and cold water is mixed with the air from the air pipe 90 at the same time as the hot and cold water is discharged from the blast nozzle 10 through the pipe 12 from the discharge path 53 and mixed with the air. Hot water is spouted into the bathtub 2.

In the above embodiment, the temperature of the hot water supplied from the bath kettle 20 with a water heater is always constant (48 ° C.) in the case of bathtub cleaning.
During the preliminary rinsing operation (step 10) or the rinsing operation (step 18), the temperature may be changed to an optimal hot water temperature adapted to the outside air temperature.

For example, assuming that the outside air temperature is t, if t <T ₁ (for example, 15 ° C.), the temperature of hot water is 50 ° C. and T ₁ ≦ t ≦ T ₂
(For example, 20 ° C.), the temperature of the hot water may be 46 ° C., and if T ₂ <t, the temperature of the hot water may be 42 ° C.

In this embodiment, the bathtub cleaning is continued even when another plug such as curan is used. However, when another plug is used, the bathtub cleaning operation is temporarily stopped. It is also possible to adopt a sequence in which the operation is suspended and the bathtub cleaning operation is resumed after the termination.

In the above embodiment, two washing nozzles are arranged in series in the longitudinal direction, but three or more washing nozzles may be arranged according to the length of the bathtub.

In the above embodiment, the slip pattern is circular. However, the present invention is not limited to this, and it is needless to say that the slip pattern may have various shapes such as a square and a hexagon.

Further, when the automatic bath filling of the bathtub 2 is performed by operating the bath automatic operation switch 105 of the kitchen remote control device 102, the drainage liquid used for washing the bathtub is drained so that the remaining liquid can be sufficiently discharged. Pouring is started with the on-off valve 95 of the plug 7 opened, and after a certain period of time, the on-off valve 95 is opened.
Can be closed.

Furthermore, in this embodiment, when the “thorough cleaning mode” is set, the bathtub cleaning time T
Although c is made longer than in other cleaning modes (step 15), instead of this, step 14 → step 16 → step 17 → step 18 → step 1
Steps up to 9 may be repeated a plurality of times.

[0064]

According to the present invention, the following effects can be obtained.

(1) In the invention according to the first aspect, since the cleaning nozzle is provided at the bottom of the bathtub, the piping is relatively easy to route, and the cleaning nozzle is located on the same plane as the inner surface of the bottom of the bathtub. Therefore, not only the appearance is good and the appearance is good, but also these washing nozzles do not interfere during bathing. In addition, since the nozzle mounting portion has a simple structure, long-term waterproofness can be ensured, and a highly reliable automatic cleaning bath can be obtained.

(2) In the invention according to the second aspect, the detergent is sprayed on the bathtub which is usually very dirty and near the water line above and below the water line,
Utilizing the flowing down of the detergent, no blind spot occurs in the bathtub washing portion, and the entire bathtub can be washed. In addition, cleaning can be performed effectively while saving detergent compared to spraying the whole.

(3) In the invention according to the third aspect, in addition to the effect of the first or second aspect, the washing nozzle is arranged on the center line in the short direction of the bathtub and a plurality of washing nozzles are arranged in series in the longitudinal direction. Since they are arranged at intervals, the entire bathtub can be washed uniformly.

[Brief description of the drawings]

FIG. 1 is a plan view of a water jet type automatic cleaning bathtub according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line XX of FIG.

FIG. 3 is a cross-sectional view taken along line YY of FIG.

4A and 4B are views showing a cleaning nozzle, wherein FIG. 4A is a front view, and FIG. 4B is a cross-sectional view taken along the line Z-Z in FIG.

FIG. 5 is a configuration diagram showing the entirety of an automatic bath apparatus provided with the automatic cleaning bathtub of the present invention.

FIG. 6 is a front view of a kitchen remote controller provided in the apparatus having the configuration shown in FIG. 5;

FIG. 7 is a flowchart for explaining the operation of the apparatus having the configuration shown in FIG. 5;

FIG. 8 is a perspective view showing the appearance of a conventional automatic washing tub.

FIG. 9 is a vertical sectional view of a conventional automatic washing tub.

[Explanation of symbols]

2 ... automatic cleaning bath, 2a ... peripheral wall, 2d ... bottom, 4 ... cleaning nozzle, 6 ... body, 6a ... head, 8 ... nozzle guide.

Continued on the front page (72) Inventor Yoji Hata 93, Edo-cho, Chuo-ku, Kobe, Hyogo Prefecture Inside Noritsu Co., Ltd. (72) Inventor Eiichi Tsuji 93, Edo-cho, Chuo-ku, Kobe City, Hyogo Pref. who Kenji Kawai, Hyogo Prefecture, Chuo-ku, Kobe City, Edo-cho, 93 address stock company in the Noritsu (72) inventor Hideaki Nagase, Hyogo Prefecture, Chuo-ku, Kobe City, Edo-cho, 93 address stock company in the Noritsu (58) investigated the field (Int.Cl. ⁷ , DB name) A47L 25/00 A47K 3/00

Claims (3)

(57) [Claims] 1. A cleaning nozzle for injecting a cleaning liquid is disposed at the bottom of a bathtub, and each cleaning nozzle has a head substantially corresponding to a size of a slip pattern having unevenness of a non-slip formed on an inner surface of the bottom of the bathtub. An automatic washing tub formed in a flat shape so as to be located on substantially the same plane as the inner surface of the bottom. 2. A washing nozzle for injecting a washing liquid is arranged at a bottom of the bathtub, and an injection port of the washing nozzle includes a position where a waterline obtained when a standard amount of hot water is poured into the bathtub is in contact with an inner wall surface of the bathtub. An automatic cleaning bath tub, wherein the spray angle is set so that the cleaning liquid is sprayed onto the bath tub while covering the upper and lower portions. 3. The washing nozzle according to claim 1, wherein a plurality of the washing nozzles are arranged in series in a longitudinal direction of the bathtub at intervals on a center line in a transverse direction of the bathtub.
The automatic washing tub according to 1.