JPH0646455Y2 - Dishwasher - Google Patents

Description

[Detailed Description of the Invention] (b) Industrial field of application The present invention cleans dishes by spraying the cleaning water at room temperature, which is supplied into the cleaning chamber by the water supply means, by the cleaning pump while being heated by the heating means. Washing operation, draining operation for draining the washing water in the washing chamber by the draining means after the washing operation, and room temperature rinsing water supplied by the water supplying means after the draining operation for the dishes by the washing pump. The present invention relates to a dishwasher that performs a rinsing operation in which rinsing is performed by injecting into the interior of the dishwasher.

(B) Conventional Technology An example of this type of dishwasher is disclosed in Japanese Patent Laid-Open No. 1-270838.

In order to prevent tableware, especially glass cups, etc. from being damaged by heat shock, this device is provided with control means for lowering the temperature of the washing water before the end of the washing process. Specifically, the control means discharges the hot wash water for about 15 seconds before the end of the wash process, then re-supplies the city water to lower the temperature and then drives the wash pump to reduce the temperature of the glass cup or the like. Is decreasing.

(C) Problems to be solved by the invention However, in the conventional example, since hot wash water is discharged, it is easy to lower the temperature, but glass cups and the like remaining in the sink are damaged by discharged hot water, and hose deterioration due to hot water discharge There is also.

The present invention has been made in view of the above point, and is intended to prevent damage and deterioration due to heat shock inside and outside the cleaning room.

(D) Means for Solving the Problems The present invention provides a cleaning operation in which the cleaning water at room temperature supplied to the cleaning chamber by the water supply means is sprayed by the cleaning pump while being heated by the heating means, and the dishes are cleaned. After the washing operation, drainage operation of draining the washing water in the washing chamber by the draining means, and after this draining operation, the rinsing water at room temperature supplied by the water supply means is sprayed onto the dishes by the washing pump to rinse. In a dishwasher that performs a rinse operation to start, when the heating means is stopped due to the end of the cleaning operation, rewatering control means for operating the water supply means to resupply water into the cleaning chamber, and the rewatering control. Pump control means for operating the washing pump to spray the washing water in the washing chamber to which room temperature water has been added by the means, and the washing control by the pump control means. When the operation of the cleaning pump is completed, the drainage control means is provided for operating the drainage means to drain the wash water in the wash chamber to perform the drainage operation.

(E) Action Damage due to heat shock easily occurs when the temperature difference exceeds 40 ° C. Therefore, the city water is very low, eg, 5 ℃
However, if the maximum heating temperature of the wash water is, for example, 65 ° C., the temperature may be lowered to about 25 ° C.

Therefore, when the cleaning operation is finished and the heating means is stopped, water is first re-supplied to add normal temperature water to lower the cleaning water temperature. Furthermore, the temperature of the glass cup or the like in the washing chamber is lowered by spraying the wash water having a lowered temperature onto the dishes. Then, after this, the wash water is discharged to the sink or the like, but at this time, the temperature of the wash water is lowered to the extent that heat shock is not given to the glass cup and the drain hose placed on the sink.

(F) Embodiments Embodiments of the present invention will be described with reference to the drawings.

In FIGS. 3 and 4, 1 is a dishwasher and 2
Is a machine frame, 3 is a cleaning chamber provided in the machine frame 2, 4 is pivotally supported on the front side of the machine frame 2, and a lid 5 is provided for opening and closing a doorway 5 of the tableware in the front of the cleaning chamber 3 A lid 6 is a lever for locking the lid 4 to the machine frame 2 in a covered state, and the locked state is released by rotating the lid 4 in the lateral direction to open the lid 4. It will be possible. Reference numeral 7 denotes a tableware storing basket, which is provided with rollers 8 ... And is mounted on guide rails 9 and 9 provided in the cleaning chamber 3. 10 is the above washing room 3
Is a hollow nozzle arm that is rotatably supported at the center of the bottom of the nozzle, and has jet nozzles 11 ... Reference numeral 12 denotes a circulating water channel for introducing the cleaning water or rinsing water in the cleaning chamber 3 into the nozzle arm 10.
Is a filter interposed in the water channel 12, and 14 is the filter 13
The handle, 15 is an impeller arranged in the circulation water passage 12, is connected to a circulation pump motor 16, and by the rotation of the impeller 15, washing water or rinsing water is introduced into the nozzle arm 10, and further, The tableware A on the tableware storage basket 7 is jetted from the jet port and again sucked into the circulating water channel 12. Reference numeral 17 denotes a sheathed heater disposed at the bottom of the cleaning chamber 3, which warms the cleaning water and rinse water and raises the temperature inside the cleaning chamber 3 during drying, thereby promoting cleaning and drying. is there.

Reference numeral 18 denotes a ventilation duct vertically formed on the rear surface of the cleaning chamber 3, and its outlet 19 is opened at the lower rear portion of the cleaning chamber 3, and a fan device 21 disposed above the inlet 20 allows the above-mentioned blower to be provided. Dry air is introduced into the cleaning chamber 3. Further, a joint pipe is formed so as to project outward in the vicinity of the outlet 19 of the blower duct 18, a water supply pipe from a water supply source (not shown) is connected to the joint pipe, and a water supply operation is also performed from the outlet 19. . The water supply pipe is opened and closed by a water supply solenoid valve. Reference numeral 22 denotes a drainage pump disposed below the cleaning chamber 3 and connected to a drain port (not shown) of the cleaning chamber 3 by a drainage pipe. The operation switch and the power switch, 24 are electrical components connected to these switches 23.

Further, 25 is a temperature detector composed of a thermistor or the like fixed to the outer bottom surface of the washing chamber 3, and detects the temperature of the washing water before and after heating and the temperature of the drying air during the drying process.

Such a dishwasher is controlled by a microcomputer 26 (hereinafter referred to as a microcomputer) as re-water supply control means, pump control means and drainage control means of the present invention. It will be described with reference to FIG.

The microcomputer 26 is a CPU 27, RAM 28, ROM 29, timer 3
0, system bus 31, and input / output ports 32, ... The CPU 27 is composed of a control unit 34 and a calculation unit 35, the control unit 34 fetches and executes instructions, and the calculation unit 35 controls the control unit 34 in the instruction execution stage.
The arithmetic processing such as binary addition, logical operation, increase / decrease, and comparison is performed on the data given from the input device or the memory by the control signal from. The RAM 28 is for storing data relating to the washing machine, and the ROM 29 is means for moving the washing machine in advance, setting conditions for judgment,
The rules for processing various information are loaded.

Signals from an input key circuit 36 composed of the various input switches, a temperature detector 25, a float type water level detector 37, and a safety switch 38 interlocking with opening and closing of the lid 4 are input to the input ports 32. Based on the input information, the output port 33 ... From the output port 33, an LED drive circuit 39 including various LED groups, a process end notification or an abnormality notification buzzer circuit 40,
A control signal is sent to the load drive circuit 41 composed of a bidirectional thyristor or the like.

The load drive circuit 41 controls the operations of the circulation pump motor 16, the fan device 21, the heater 17, the water supply valve 42, and the drainage pump 22 according to the control signal from the microcomputer 26.
43 is a power supply circuit that supplies a voltage to the microcomputer 26, and 44 is a reset signal generation circuit.

The operation of the first embodiment based on such a configuration is shown in FIG.
2 and FIG. 2.

When the tableware is stored in the storage basket 7 and a start switch (not shown) is operated, the main cleaning step is first started.

In this main cleaning step, the microcomputer 26 first supplies water into the cleaning chamber 3, detects a predetermined water level by the water level detector 37, then turns on the heater 17 and stops water supply, and further circulates the water. Turn on the pump motor 16. As a result, the washing water is heated by the heater 17 and heated, and is sprayed from the nozzle arm 10 onto the dishes. This main cleaning process is performed for 9 minutes, during which the heater 17 is turned on at a water temperature of 60 ° C.
-OFF controlled.

After that, the heater 17 is turned off to perform the auxiliary cleaning process for 3 minutes. Here, first, the water supply valve 42 is opened while measuring about 15 seconds with the timer 30, and the temperature of the cleaning water is lowered by the supply water. . During this period, the circulation pump motor 16 is turned on, and low-temperature washing water is sprayed on the dishes to lower the temperature.

When the auxiliary cleaning process (3 minutes) is completed, drain pump 22
Turn on for 50 seconds to discharge all the washing water, and then supply clean city water to perform the rinsing process.

Here, FIG. 1 (b) shows the operation of the second embodiment, and FIG. 1 (c) shows the operation of the third embodiment, but each embodiment is dedicated to the first embodiment. The auxiliary cleaning process is different, and the different process will be described below.

In the second embodiment, in the auxiliary cleaning process in which the heater 17 is turned off,
The water temperature (t) is measured by the detector 25 while opening the water supply valve 42 and continuously supplying water or intermittently supplying water for a predetermined time.
In addition, in this embodiment, the initial city water temperature (to) is detected and stored at the time of water supply in the main cleaning process, and the water temperature (t) in the auxiliary cleaning process is (to) +35. The temperature is lowered to ℃ until the detector 25 measures. However, the condition is that the water level detector 37 does not detect an abnormal water level. And
This auxiliary cleaning process is completed about 1 minute after the water supply is completed.

In the third embodiment, in the auxiliary cleaning process in which the heater 17 is turned off,
When the water supply valve 42 is opened to continuously supply water and the water level detector 37 detects an abnormal water level, the water supply is ended, and then the auxiliary cleaning process is ended in about 1 minute.

Therefore, in any of the examples, the temperature of the wash water discharged in the drainage process is low, and almost no damage accidents such as glass cups due to heat shock inside and outside the wash room occur, and the drain pipe (hose) There is not much thermal deterioration.

In each embodiment, the temperature lowering work is executed in the auxiliary cleaning process, but it may be executed before draining in the draining process.

(G) Effect of the device According to the configuration of the present invention, the temperature of the heated cleaning water is lowered, and further, the cooled cleaning water is sprayed on the glass cup or the like in the cleaning chamber and then drained. It is possible to prevent the glass cup and the like from being damaged by heat shock inside and outside the washing room, and to provide an extremely safe dishwasher.

[Brief description of drawings]

1 (a), (b), and (c) are the first, second, and
A flowchart showing the operation of the third embodiment, FIG.
FIG. 3 is a perspective view, FIG. 4 is a side sectional view, and FIG. 5 is a block circuit diagram of an embodiment. 3 ... Washing room, 17 ... Heater (heating means), 22 ... Drainage pump (drainage means), 26 ... Microcomputer (re-water supply control means, pump control means, drainage control means), 42 ... Water supply valve ( Water supply means), 25 ... Temperature detector, 37 ... Water temperature detector.

Front Page Continuation (72) Creator Kenji Yamane 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (56) Reference JP 62-270129 (JP, A) JP 62-270130 ( JP, A) JP-A-2-29231 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A washing operation in which the washing water at room temperature supplied to the washing chamber by the water supplying means is sprayed by a washing pump while being heated by the heating means to wash the dishes, and after this washing operation, the draining means is used to carry out the above-mentioned operation. Tableware performing a draining operation for draining the cleaning water in the cleaning chamber, and a rinse operation for starting the rinse by injecting the rinsing water at room temperature supplied by the water supply means to the tableware by the cleaning pump after the draining operation In the washing machine, when the heating means is stopped due to the end of the washing operation, a re-water supply control means for operating the water supply means to re-supply water into the cleaning chamber, and a cleaning in which normal temperature water is added by the re-water supply control means Pump control means for operating the washing pump to spray the washing water in the room to the dishes, and when the operation of the washing pump by the pump control means is completed, Serial washing water of the washing chamber to operate the drainage means so as to drainage dishwasher, characterized in that a discharge control means for performing the water-discharge operation.