JPH07338A - Dish washer/drier - Google Patents

Abstract

PURPOSE:To provide a dish washer/drier capable of surely removing the stains stuck to dishes. CONSTITUTION:The gas constituent of stains filled in a dish washing chamber is detected by a gas sensor 23 during washing, and the transmittance of washing water after washing is detected by a photo-sensor. A control device 30 judges the type of the stains based on the output from the gas sensor 23 and judges the quantity of the stains based on the transmittance detected by the photo- sensor. Washing is performed for the washing time and at the washing water temperature obtained from the tables preset for the optimum washing time and washing water temperature in response to the type and quantity of stains and stored in a ROM 26 based on the judged results.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a dishwasher.

[0002]

2. Description of the Prior Art As a conventional dishwasher / dryer, for example, as disclosed in Japanese Patent Laid-Open No. 60-48724, washing water sprayed in a dishwashing room is circulated during washing to wash after washing. There is a device in which the light transmittance of water is detected by an optical sensor including a light emitting portion and a light receiving portion. Here, this optical sensor is such that light from the light emitting portion is applied to the cleaning liquid at a predetermined interval, and the output of the light receiving portion at that time is detected to detect the transmittance of the cleaning liquid, that is, the contamination of the cleaning liquid. .

Then, as the cleaning progresses, the cleaning water becomes dirty and its permeability becomes low, and the dishes and the like eventually become dirty, and the permeability of the cleaning water becomes constant, and when the output of the light receiving unit is no longer changed, the dishes are washed. The dryer is controlled to finish the washing.

[0004]

By the way, in such a conventional dishwasher / dryer, depending on the quality of stains attached to dishes or the like, the stains may not be completely removed even after washing for a certain period of time. However, in this case, even if the dishware or the like remains dirty, if the permeability of the washing liquid does not change, the dishwasher / dryer finishes the washing.

In such a case, the cleaning operation must be repeated again, which is a troublesome task.

An object of the present invention is to provide a dishwasher / dryer capable of surely removing dirt adhering to dishes and the like.

[0007]

SUMMARY OF THE INVENTION The present invention circulates wash water sprayed into a dishwashing room at the time of washing, detects the transmittance of the wash water after washing with an optical sensor, and changes the transmittance. In a dishwasher / dryer that is controlled to terminate the cleaning when there is no more, a gas sensor that detects the gas component of dirt adhering to dishes and the dirt judgment that determines the type of dirt based on the output from the gas sensor And a storage unit that stores a table in which the optimum cleaning time and cleaning water temperature for cleaning are predetermined according to the type and amount of dirt, while the dirt determination unit determines the type of dirt during cleaning. At the same time, a control device that determines the amount of dirt from the transmittance detected by the optical sensor, and performs the cleaning at the cleaning time and the cleaning water temperature obtained from the table according to these judgment results is provided. Equipped A.

Further, according to the present invention, in the dishwashing / drying machine in which the odor in the dishwashing room is deodorized by the ozone deodorizing device at the time of drying after washing the dishes, the amount of the odor filling the dishwashing room is detected. While having a gas sensor and a storage unit that stores a table in which the deodorizing operation time of the ozone deodorizing device necessary to deodorize the odor is stored in advance according to the amount of the odor, the storage unit stores the table according to the detection result of the gas sensor. The ozone deodorizing device is provided with a control device that causes the ozone deodorizing device to perform a deodorizing operation only for the time obtained from the table.

[0009]

With this configuration, at the time of cleaning, the gas component of the dirt filling the dishwashing room can be detected by the gas sensor, and the transmittance of the cleaning water after cleaning can be detected by the optical sensor. it can. In addition, the control device can determine the type of contamination based on the output from the gas sensor by the contamination determination unit, and can determine the amount of contamination based on the transmittance detected by the optical sensor. Then, the optimum cleaning time and cleaning water temperature for cleaning, which are stored in the storage unit according to these judgment results, are set to the cleaning time and cleaning water temperature obtained from a table predetermined according to the type and amount of dirt. Cleaning can be performed.

Further, at the time of drying after washing the dishes, the amount of odor filled in the dish washing room can be detected by the gas sensor. Then, the control device obtains the deodorizing operation time of the ozone deodorizing device necessary for deodorizing the odor, which is stored in the storage unit according to the detection result of the gas sensor, from a table predetermined according to the amount of the odor. The ozone deodorizing device can be caused to perform the deodorizing operation only for the time.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view of a dishwasher / dryer according to an embodiment of the present invention.

In the figure, 1 is a dishwasher main body 2
A dishwashing room formed on the upper part of the main body (hereinafter referred to as the main body) and provided with a dish storage outlet 1a on the front side, 2a is a door for opening and closing the dish storage outlet 1a, and 3 is rotatable in the lower central part of the dish washing chamber 1 Nozzles 4, which are provided in the nozzle and eject the washing water and the rinsing water, are heaters for heating the washing water.

At the front part of the bottom of the dishwashing chamber 1, a recess 6 having an opening 6a into which the washing water flows in and an outlet 5 for discharging the washing water to the side. Are formed. The opening 6a is covered with a filter 7 so that the leftover food will not enter the recess 6.

On the other hand, in the center of the bottom of the dishwashing room 1,
A forward / reverse cleaning / drainage pump 12 having a pump casing 11 having a suction port 8, a discharge port 9 and an impeller 10 is arranged. At this time, the cleaning / drainage pump 12 sends the cleaning water, which is normally rotated and flows into the concave portion 6 at the time of cleaning, to the nozzle 3 through the discharge port 9 of the pump casing 11 to squirt and circulate in the dish cleaning chamber 1. After the cleaning is completed, the cleaning water is reversed and the dirty cleaning water is discharged to the outside of the dish washing room 1 through the drain pipe 13.

An optical sensor (not shown) is provided at the suction port 8 of the pump casing 11, and the optical sensor detects the permeability of the cleaning water after cleaning. Reference numeral 14 is a rubber pipe that connects the discharge port 5 of the recess 6 and the suction port 8 of the pump casing 11.

By the way, reference numeral 15 is an outer tub that covers the dish washing chamber 1, and a gap is formed between the rear plate 15a of the outer tub 15 and the back plate 1b of the dish washing chamber 1. A circulation air passage 17 and a cooling air passage 18 which are partitioned by a double-sided fan 16 are formed.

Here, the circulation air passage 17 connects the exhaust port 19 provided at the upper portion of the back plate 1b of the dish washing chamber 1 and the intake port 20 provided at the lower portion. Then, the air in the dishwashing room 1 is forcibly discharged from the exhaust port 19 to the circulation air passage 17 by the double-sided fan 16, heat-exchanged by the double-sided fan 16 to be dehumidified, and then from the intake port 20. It is designed to be inhaled to 1.

Numeral 21 is a fan motor for rotating the double-sided fan 16 in response to a drive signal from a control device which will be described later.
Reference numeral 2a is a water supply valve which is opened by an opening signal from the control device and supplies the wash water into the dish washing room 1 through the water supply port 22b.

The circulation air passage 17 is provided with a gas sensor 23 for detecting a gas component of dirt adhering to dishes or the like, for example, an alcohol content. And, for example, miso, soy sauce, etc. attached to tableware etc.
Since stains such as sake and bread have different alcohol contents, the control device can determine the type of stains based on the detection output of the gas sensor 23.

On the other hand, in front of the recess 6, as shown in FIG. 2, a CPU 24, a RAM 25, a ROM 26, a timer 27,
A control device (microcomputer) 30 having a system bus 28 and an input / output port 29 for controlling each operation of washing, rinsing and drying of the dishwasher is provided.

Here, the RAM 25 is for storing data regarding each operation of cleaning, rinsing and drying, and the ROM 26 is a program for controlling each operation and processing of various information, and the optimum cleaning for cleaning. It is a storage unit that stores a table or the like in which time and wash water temperature are predetermined according to the type and amount of dirt.

The table stored in the ROM 26 is
Various stains were created by an experiment, and the optimum washing time and washing water temperature obtained according to the quality and amount of the stains were recorded. The table also records data such as optimum rinsing time, rinsing water temperature, drying time, and drying temperature, which differ depending on the quality and amount of stains.

On the other hand, the CPU 24 fetches and executes an instruction, and a control signal from the control section 24a at the instruction execution stage.
Logical operation for data etc. from M25 and ROM26
It is composed of an arithmetic unit 24b that performs arithmetic processing such as increase / decrease and comparison.

When a detection output is input from the gas sensor 23 via the input / output port 29, the CPU 24 uses the data stored in the ROM 26 in advance based on the detection output to determine the type of dirt adhering to dishes or the like. When the detection output is input from the optical sensor through the transmittance detection circuit 31 and the input / output port 29, the ROM has a function as a dirt determination unit for determining the ROM based on the detection output.
It has a function of judging the amount of dirt from the data stored in advance in 26.

The control device 30 is provided with operation information of various keys provided on an operation unit (not shown).
A load drive circuit 33 for controlling the energization of the input key circuit 32, the heater 4, the fan motor 21, the water supply valve 22b, etc. is connected via the input / output port 29.

Then, when the start button provided on the operation unit is pressed, the control device 30 outputs a drive signal to the fan motor 21 via the load drive circuit 33 to rotate the double-sided fan 16 and the dish washing room. The air of 1 is circulated to make the gas in the dishwashing room 1 uniform so that the gas sensor 23 can accurately detect the alcohol content of the dirt.

Further, the control device 30 starts washing, and after a predetermined time elapses, in this embodiment, after three minutes elapses from the start of washing, the washing water is detected by the optical sensor based on the output of the timer 27. The transparency is detected, and the amount of dirt is judged from the detection output at that time.

If it is determined from these determination results that, for example, the tableware has a certain amount of miso, the control device 30 determines based on the table stored in the ROM 26.
Wash with the optimum washing water temperature and washing time to remove this miso, then rinse with the optimum rinse time, rinse water temperature, and number of rinses, and finally dry at the optimum drying time and drying temperature. I am trying.

In the figure, 34 is a water temperature detector for detecting the temperature of washing water and rinsing water, 35 is a door switch for notifying the controller 30 that the door 2a is closed,
36 is an LE for blinking various lamps provided on the operation unit
A D-lighting circuit, 37 is a buzzer circuit for notifying the end of the washing / drying operation and the occurrence of abnormality, 38 is a power supply circuit for supplying power to the control device 30, and 39 is a reset circuit.

Next, the washing operation of the dishwasher thus constructed will be described with reference to the flow chart shown in FIG.

First, when dirty dishes and the like are stored in the dish washing room 1 and then the start button provided on the operation unit is pressed, the control device 30 turns on the fan motor 21 via the load drive circuit 33. And the water supply valve 22b is turned on (processes 50 and 51). Then, when a certain period of time has passed (Y in decision 52), the fan motor 21 is turned off (process 53).

In this way, the fan motor 2
When 1 is turned on, the air in the dish washing room 1 is circulated and the gas in the dish washing room 1 is made uniform, whereby the gas sensor 23 can accurately detect the alcohol content of the dirt.

Thereafter, the detection output of the gas sensor 23 is input to the control device 30 via the input / output port 29 (process 54), and the CPU 24 of the control device 30 becomes dirty according to the alcohol content detected by the gas sensor 23. Determine the type of.

On the other hand, the water supply is continued even after the detection by the gas sensor 23 is performed, and the water supply valve 22b is turned off when the wash water reaches a certain amount, and thereafter, when a predetermined time elapses and the water level trips (stabilizes). (Y in judgment 55), the optical sensor detects the transmittance of the wash water. And the CPU 24
Receives the detection output from the permeability detection circuit 31 (process 56) and detects the permeability of the cleaning water before the cleaning is started.

After that, the cleaning is started (process 57), and when 2 minutes have elapsed after the start of cleaning (Y in judgment 58), the cleaning is once stopped (process 59). Then, after 1 minute has elapsed after stopping the cleaning (Y in judgment 60), the water level is tripped, and in this state, the transmittance of the dirty cleaning water after cleaning is detected by the optical sensor.

Then, the CPU 24 inputs the detection output of this optical sensor (process 61), determines the quality and amount of dirt from the detection output of the gas sensor 23 and the detection output of the optical sensor, and stores them in the ROM 26. Based on the table below, the optimum cleaning water temperature and cleaning time for removing this dirt,
The optimal rinse time, rinse water temperature and number of rinses, optimal drying time and drying temperature are determined (process 62).

After this, first, the control device 30 controls the energization of the heater 4 and sets the timer 27 to perform the cleaning so that the cleaning is performed at the optimum cleaning water temperature and the cleaning time thus obtained. Restart (Process 6)
3). Then, thereafter, the control of each operation of cleaning, rinsing and drying is continued according to this setting (process 64).

In this way, during cleaning, the gas component of dirt is detected by the gas sensor 23 to determine the type of dirt adhering to the dishes and the like, and the transmittance of the wash water is detected by the optical sensor to detect dirt. You can judge the quantity. Then, it is possible to perform the cleaning at the optimum cleaning time and the cleaning water temperature obtained from the table stored in the ROM 26 according to these judgment results.

By the way, in a conventional dishwasher / dryer, for example, as disclosed in Japanese Patent Laid-Open No. 3-126421, at the time of drying after dishwashing, the odor in the dishwashing room is deodorized by an ozone deodorizing device, and the dishes are washed. There is a device that does not give a user a discomfort when the door is opened to take out the items.

However, since ozone adversely affects the human body, it is necessary to suppress the amount of ozone generated to the minimum necessary. Therefore, the amount of ozone generated can be minimized by detecting the odor state with a gas sensor and controlling the operating time of the ozone deodorizing device according to the detected output.

Next, another embodiment of the present invention will be described with reference to the drawings.

FIG. 4 is a side sectional view of a dishwasher / dryer according to another embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 indicate the same or corresponding parts.

In the figure, reference numeral 40 is an ozone deodorizing device provided at the exhaust port 19 of the dish washing room 1. This ozone deodorizing device 40 is, for example, as shown in FIG. 5, a power source section 41 for generating ozone. And a diffusion board 42 for dispersing ozone in the air, and a reaction between ozone and odor,
It has an ozone deodorizing catalyst 43 that decomposes excess ozone, and an acidic gas absorbent 44 that absorbs acidic gas and decomposes excess ozone.

Further, in FIG. 4, 23a is a gas sensor for detecting the amount of odor filled in the dishwashing room 1, and these ozone deodorizing device 40 and gas sensor 23a have an input / output port 29 as shown in FIG. Through the control device 3
It is designed to be connected to 0A.

On the other hand, in FIG. 6, reference numeral 26A is a ROM which is a storage unit for storing a table in which the deodorizing operation time of the ozone deodorizing device 40 necessary for deodorizing the odor is predetermined according to the amount of the odor. is there. In addition, in the present embodiment, one operation time of the ozone deodorizing device 40 is assumed to be constant,
Therefore, in the table, the number of times the ozone deodorizing device 40 is driven for a certain period of time so that the deodorizing operation time depends on the amount of odor,
That is, the driving cycle is recorded.

After the drying process starts, the control device 30A detects the amount of odor filled in the dishwashing room 1 with the gas sensor 23a, and R is detected according to the detection result.
From the table stored in the OM 26A, deodorization is performed at the optimum drive cycle of the ozone deodorization device 40.

In the present embodiment, the control device 30A operates the ozone deodorizing device 40 only when the amount of odor exceeds a certain level that makes the user uncomfortable. .

Further, the ozone deodorizing device 40 is adapted to detect the gas component of the odor even after the deodorizing operation is performed, and if the deodorizing operation is completed even if the deodorizing operation time obtained from the table is not reached, then the ozone deodorizing device is used. By not driving 40, unnecessary ozone generation is suppressed.

Next, the deodorizing operation of the dishwasher / dryer according to another embodiment having such a configuration will be described with reference to the flowchart shown in FIG.

When the washing and rinsing of the dishes and the like are completed, the drying process starts, and first the heater 4 and the fan motor 21 are turned on (steps 70 and 71). Then, when a certain period of time has passed (Y in decision 72), the fan motor 21 is turned off (process 73).

In this way, the fan motor 2
When 1 is turned on, the air in the dish washing room 1 is circulated and the gas in the dish washing room 1 is made uniform, whereby the gas sensor 23 can accurately detect the amount of odor.

After that, the control device 30A inputs the detection result of the gas sensor 23 through the input / output port 29 (process 74), and the detected amount of odor causes a constant discomfort to the user. It is determined whether the level is equal to or higher than the level (determination 75).

If the amount of odor is above a certain level (Y in judgment 75), the ozone deodorizing device 40 will be operated for a certain period of time at a cycle corresponding to the detected amount of odor based on the table stored in the ROM 26A. Is driven to generate ozone (process 76).

When the deodorizing operation is performed until a predetermined time has elapsed (Y in judgment 77), the odor is detected again by the gas sensor 23 until the drying is completed (N in judgment 78), and the amount of odor is determined. Is above a certain level (Y in decision 75), the ozone deodorizing device 40 is driven for a certain period of time in a cycle according to the amount of odor detected again to emit ozone (process 76).

By the way, in this way, the ozone deodorizing device 40 is
If the amount of odor falls below a certain level (N in judgment 75) until the drying is completed by repeating the deodorization operation according to (N in judgment 75), even if the deodorization operation time obtained from the table is not reached. The ozone deodorizing device 40 is not driven to suppress the generation of unnecessary ozone.

Even if the amount of odor is below a certain level (N in decision 75), after every predetermined time (Y in decision 79), the drying is completed (decision 80).
N) The gas sensor 23 detects the amount of odor.

In this way, the amount of odor is detected by the gas sensor 23a.
The ozone deodorizing device 4 is detected for the time obtained from the table stored in the ROM 26A according to the detection result.
The deodorizing operation can be set to zero.

[0059]

As described above, according to the present invention,
Since it is possible to determine the type and amount of dirt adhering to dishes and the like and perform the cleaning at an optimum cleaning time and cleaning water temperature, it is possible to reliably remove the dirt adhering to the dishes and the like. Further, during drying, the amount of odor in the dishwashing chamber can be detected and only the amount of ozone necessary for deodorization can be generated, so that the adverse effect of ozone on the human body can be prevented.

[Brief description of drawings]

FIG. 1 is a side sectional view of a dishwasher and dryer according to an embodiment of the present invention.

FIG. 2 is a block configuration diagram of a control device of the dishwasher.

FIG. 3 is a flowchart showing a washing operation of the dishwasher.

FIG. 4 is a side sectional view of a dishwasher / dryer according to another embodiment of the present invention.

FIG. 5 is a configuration diagram of an ozone deodorizing device of the dishwasher.

FIG. 6 is a block configuration diagram of a control device of the dishwasher.

FIG. 7 is a flowchart showing a deodorizing operation of the dishwasher.

[Explanation of symbols]

 1 Dishwashing room 23, 23a Gas sensor 26, 26A ROM 30, 30A Control device 31 Permeability detection circuit 40 Ozone deodorizing device

Claims (2)

[Claims] 1. Washing is performed by circulating wash water ejected into a dishwashing room at the time of washing, and the transmittance of the wash water after washing is detected by an optical sensor, and the washing is finished when there is no change in the transmittance. In a dishwasher that is controlled to operate, a gas sensor that detects the gas component of dirt adhering to dishes, etc., a dirt determination unit that determines the type of dirt based on the output from the gas sensor, and the optimum cleaning for cleaning While having a storage unit that stores a table in which time and cleaning water temperature are predetermined according to the type and amount of dirt, the type of dirt is determined by the dirt determination unit during cleaning and detected by the optical sensor. The dishwasher is equipped with a control device that determines the amount of dirt from the permeability and the washing time and the washing water temperature obtained from the above table according to the results of these determinations. Dry . 2. In a dishwasher / dryer in which the odor in the dishwashing room is deodorized by an ozone deodorizing device during drying after washing the dishes, a gas sensor for detecting the amount of odor filling the dishwashing room, The deodorizing operation time of the ozone deodorizing device required for deodorizing the odor is obtained from the table according to the detection result of the gas sensor, while having a storage unit that stores a table predetermined according to the amount of the odor. A dishwasher / dryer, characterized in that the ozone deodorizer is provided with a control device for operating the deodorizer for a predetermined time.