JPH0295326A - Dish washer - Google Patents

Abstract

PURPOSE:To prevent the lowering of washing effect and the generation of a washing incapable condition by operating a notifying means corresponding to the change and notifying the clogging of a filter when the condition of the pressure detecting means of wash water, a flow rate detecting means or the rotation detecting means of a jet nozzle are changed. CONSTITUTION:A control circuit 24a monitors that water pressure in a pipe 11 is lowered and the contact of a pressure switch 25 is restored after passing of an arbitrary delay time from the time when the washing is started up to the time when, for example, the contact of the pressure switch 35 is operated. When the residue of a large quantity is collected in a filter 7 in the middle of washing, clogging is generated and the circulating quantity of the wash water is reduced, the pressure in the pipe 11 is lowered, and the jet quantity of the wash water from a jet port 13 fitted to a jet nozle 12 is reduced. Consequently, by setting the contact restoring power of the pressure switch 35 at an arbitrary pressure, the reduction of the circulating quantity can be detected. When the contact of the pressure switch 35 is restored, the control circuit 24a blinks a display lamp 25 or sounds a buzzer 26, and the circulating quantity lowering of the wash water is notified.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a dishwasher that sprays washing water onto dishes stored in a washing cabinet to wash them, and more specifically, This invention relates to a dishwasher equipped with means for detecting system abnormalities.

[Prior Art] Conventionally, dishes are washed by rotating a spray nozzle using a washing water supply device such as a circulation pump, and spraying washing water onto the dishes in a washing cabinet from a spray port provided in the spray nozzle. Washing machines are well known. An example thereof will be explained with reference to FIG.

In the figure, (1) is the washing machine body, (2) is the washing chamber installed inside the washing machine main body (1), the water supply port (3) is provided at the top, and the washing water is circulated at the bottom. A concave drainage basin (4) having a water inlet (5) for discharging water and a drainage outlet (6) for discharging waste water is provided.

(7) is a filter detachably set in the upper opening of the drainage basin (4). (8) is a water supply hose whose one end is connected to the water supply port (3) via the electromagnetic on-off valve (9);
The other end is extended to the outside of the washer body (1) and connected to a water faucet or the like. (■0) is a circulation pump connected to a water supply port (5), and its output side is connected to an injection nozzle (12) through a pipe (11) made of rubber, for example. (13) is a plurality of injection ports provided in the injection nozzle (12). (14) is a drain pipe with one end connected to the drain port (6) of the drain basin (4), and the drain pump (15)
) is taken out of the washer main body (1). (
16) is the opening provided in the washing machine body (1), (17) is the door that opens and closes this opening (16), and (19) is the tableware (
20), which is stored in the washing chamber (2) through an opening (16) along a rail (18) provided in the washing chamber (2). In addition, (21) is the door (17
) is a control panel provided with operation switches, indicator lamps, etc.

The operation of the conventional dishwasher configured as described above will be explained as follows. First, the electromagnetic on-off valve (9) is opened to supply a predetermined amount of washing water into the washing chamber (2). The cleaning water that has accumulated above the filter (7) is removed from the circulation pump (1).
0), the water is guided to the injection nozzle (12), and the injection nozzle (12) rotates due to the water supplied from the circulation pump (10), from the injection port (13) to the tableware (20) in the basket (19). Wash the tableware (20) by spraying washing water. During cleaning, the circulating cleaning water is filtered by the filter (7) to prevent clogging of the circulation pump (lO).

After cleaning for a predetermined period of time, the circulation pump (10) is stopped and the drainage pump (15) is activated to drain the drainage basin (4).
) is forcibly discharged to the outside of the washer body (1), for example to the kitchen sink. Next, new wash water is supplied again to drive the circulation pump (lO), rinsing is performed, and the wash water is discharged. Finally, the heater (not shown) is energized or hot air is blown into the washing cabinet (2) to clean the tableware (19).
) to dry. It may be rinsed with hot water before drying.

When the washing of the tableware (20) is finished, open the door (17), pull out the basket (19) in which the tableware (20) is stored, and then take out the filter (7).
), discard and clean the residue that has accumulated in the drain basin (4), and place it again on top of the drainage basin (4). This treatment of residue from the filter (7) usually needs to be carried out every time the filter (7) is cleaned in order to prevent the injection pressure of the circulation pump (10) from decreasing due to clogging.

[Problem 8 to be solved by the invention] According to the conventional dishwasher configured as described above, if the next washing is performed without cleaning the filter, the cleaning effect will be reduced due to the filter being clogged with residue. However, in some cases, the necessary rotation and spraying of the injection nozzle may not be obtained, and the cleaning process may end without performing the desired cleaning.

The present invention has been made in order to solve the above-mentioned problems, and is a dishwasher that can detect and notify an abnormality when the specified washing is not performed due to filter clogging, etc. The purpose is to obtain an opportunity.

[Means for Solving the Problems] The dishwasher according to the present invention includes a pressure reaction section that reacts to changes in the pressure of the washing water in the washing water circulation path, and means for detecting the amount of change in the pressure reaction section. A pressure detecting means consisting of a pressure detecting means is provided, and an alarm means is provided which operates in accordance with the state of the pressure detecting means.

Further, in the present invention, a washing water pressure detection means is provided in the washing water circulation path, and a notification means is provided which operates in accordance with the state of this pressure detection means.

Further, in the present invention, a wash water flow rate detection means is provided in the wash water circulation path, and a notification means is provided which operates in accordance with the state of the flow rate detection means.

The present invention also provides means for detecting rotation of the injection nozzle;
A notification means is provided which operates according to the state of this means.

[Function] When the amount of circulating water for cleaning water decreases due to clogging of the filter, the state of the pressure detection means or flow rate detection means of the cleaning water or the rotation detection means of the injection nozzle changes, and the notification means is activated in response to this change. It activates and notifies you of a clogged filter.

Therefore, the filter can always be kept clean and free from clogging, and a decrease in the cleaning effect and a state in which cleaning is not possible can be prevented.

[Embodiment of the Invention] FIG. 1 is a front view showing essential parts of an embodiment of the invention. Note that the same or equivalent parts as in the conventional example shown in FIG. 11 are given the same reference numerals, and their explanation will be omitted. (22) is the circulation pump (10)
A magnet provided in a part of a vibrator (11) made of rubber, for example, which connects between the and the injection nozzle (12),
(23) is a Hall element provided near the magnet (22).

FIG. 2 is an enlarged perspective view of the main part of FIG. 1. (lla) is a pressure reaction part that is formed integrally with a part of the vibrator (11) made of rubber, for example, and has a magnet (22) attached to the upper part. ) so as to be able to react to changes in the pressure of the cleaning water circulating inside. (23a) is a lead wire that takes out the signal of the Hall element (23), and these magnet (22), Hall element (
23), pressure reaction part (lla) lead wire (23a)
etc. constitute a cleaning water pressure detection means.

FIG. 3 is an electrical block diagram showing an embodiment of the present invention. (24) is a control circuit, (25) is an indicator lamp that notifies the pressure change of the cleaning water, (2B) is also a buzzer for notification, and these hall elements (23), indicator lamps (25),
The buzzers (26) are each connected to a control circuit (24). Note that the display lamp (25) and buzzer (26) are provided on the control panel (21).

A detailed explanation of the present invention configured as above is as follows. When cleaning starts, the circulation pump (10)
is activated, and the cleaning water is sent to the injection nozzle (12). Therefore, the water pressure inside the vibrator (11) increases and
The pressure reaction part (lla) of 1) expands due to the pressure, and the magnet (22) approaches the Hall element (23), changing the impedance of the Hall element (23). The control circuit (24) includes a Hall element (2) after cleaning is started.
A delay time is provided until the impedance changes in step 3), and after this delay time has elapsed, the pole element (23) is removed during cleaning.
Monitor the impedance for recovery.

If a large amount of residue is collected on the filter (7) during cleaning and the filter (7> becomes clogged), the amount of cleaning water circulated decreases and the pressure inside the vibrator (11) decreases.

Therefore, the pressure reaction part (lla) contracts and the magnet (
22) is separated from the Hall element (23), and the Hall element (2
3) impedance is restored. This causes the control circuit (24) to blink the display lamp (25) and the buzzer (24) to blink.
6) to notify you of a decrease in the amount of circulating water.

FIG. 4 is a front view showing another embodiment of the present invention. (3
5) is a pressure switch provided outside the washing chamber (2) in the washing machine main body (1). <1lb) is a branching vibe that is branched from the vibe (11) connecting between the output side of the circulation pump (10) and the injection nozzle (I2), and transmits changes in water pressure to the pressure switch (35). . The pressure switch (35) and the branch vibrator (llb) constitute pressure detection means.

FIG. 5 is an electrical block diagram of this embodiment.

(24a) is a control circuit, (25) is a display lamp for notification, and (26) is a buzzer for notification. Pressure switch (3
The contact 5) is connected to the control circuit (24a),
The display lamp (25) and buzzer (26) are also connected to the control circuit (24).
a). Note that the indicator lamp (25) and buzzer (26) are attached to the control panel (21).

In this embodiment configured as described above, when cleaning is started, first the circulation pump (10) is activated and the cleaning water is sent to the injection nozzle (12). Because of this, the vibrator (11)
The water pressure inside the branch vibe (llb) rises, and the pressure is transmitted to the pressure switch (35).
5) Activate the contact. Therefore, the control circuit (24a)
After an arbitrary delay time has elapsed from the start of cleaning until the contact of the pressure switch (35) operates, the water pressure in the pipe (11) decreases and the contact of the pressure switch (35) returns. to monitor.

During cleaning, a large amount of residue is collected in the filter (7), and when the filter (7) becomes clogged and the circulation amount of cleaning water decreases, the pressure inside the pipe (■1) decreases and the injection nozzle ( 12) The amount of cleaning water sprayed from the spray port (13) attached to the pipe (12) decreases. For this reason, the pressure switch (35)
By setting the contact return pressure to an arbitrary pressure, this decrease in circulation amount can be detected.

When the contact of the pressure switch (35) returns, the control circuit (
24a) blinks the indicator lamp (25) or sounds the buzzer (26) to notify the user of the decrease in the amount of circulating water.

FIG. 6 is a front view showing another embodiment of the present invention, (40)
is a flow meter, (lie) and (lid) are pipes.

The inlet side of the flow meter (40) is connected to the circulation pump (10) via a pipe (lie), and the outlet side is connected to the circulation pump (10) via a pipe (lie).
) to the injection nozzle (12).

FIG. 7 is a sectional view of the flowmeter (22) shown in FIG. 6. (27) is a lid with a guide post in the center; (28)
) is a reed switch housed in the guide post of the lid (27), and (29) is a lead wire attached to the reed switch (28) for taking out a signal.

(30) is a float with a specific gravity of 1.0 or more that is inserted into the guide post of the lid (27), and its diameter is set smaller than the inner diameter of the case of the flowmeter (40), so that water can flow around it. ing. (31) is a stopper for the float (30), and (32) is a magnet that is embedded in the float (30) and operates the reed switch (25). Furthermore (4
0a) is the inlet of the flow meter (40), located directly below the float (30), and connected to the pipe (llc). Further, (40b) is an outlet of the flow meter (40), which is provided above the stop position (solid line portion) of the float (30) when there is no water flow, and is connected to the pipe (lld).

FIG. 8 is an electrical block diagram of this embodiment.

(24b) is a control circuit, (25) is a display lamp for notification, and (26) is a buzzer for notification. Reed switch(
The contact point 28) is connected to the control circuit (24b),
The display lamp (25) and buzzer (26) are also connected to the control circuit (24).
Note that the indicator lamp (25) and buzzer (26) connected to b) are attached to the control panel (21).

The operation of this embodiment configured as described above will be explained as follows. First, in the normal state when the equipment is stopped, the float (30) of the flowmeter (40) is positioned downward (7th position).
The reed switch (28) is in the ON state due to the magnet (32).

Next, when cleaning starts, the circulation pump (10) operates,
Cleaning water is sent to the injection nozzle (12) via a flow meter (40). When the flow rate flowing through the flow meter (40) exceeds a predetermined flow rate, the float (30) rises and moves to the position shown by the broken line in FIG. This allows the reed switch (2
8) is separated from the magnet (32), so it is in the OFF state. The control circuit (24b) provides a delay time from the start of cleaning until the reed switch (28) is turned off, and after this time has elapsed, the reed switch (28) is turned on again during cleaning. to monitor. If a large amount of residue collects on the filter (7) during cleaning and the filter (7) becomes clogged, and the circulation rate of cleaning water decreases to a predetermined level, the float (30) moves from the dashed line position to the solid line position. Go down and turn on the reed switch (28) using the magnet (32). Therefore, the control circuit (24b) blinks the display lamp (25) and sounds the buzzer (26) to notify the user of the decrease in the amount of circulating water.

FIG. 9 is a longitudinal sectional view of still another embodiment of the present invention.

In the figure, (32) is the magnet attached to the negative end of the injection nozzle (12), and (28) is the magnet (32).
For example, a reed switch installed near the washing cabinet (
2) is housed in a chamber (36) provided on the outer wall. Note that the magnet (32) may be provided on the lower surface of the injection nozzle (12).

FIG. 10 is an electrical block diagram of this embodiment.

(24c) has the functions of a means for detecting the operation of the reed switch (28) and a means for detecting the rotation speed of the injection nozzle (12) by the operation of the reed switch (28) and notifying when the rotation speed decreases. (25) is a display lamp for notification, and (2B) is a buzzer for notification. The contacts of the reed switch (28) are connected to the control circuit (24c), and the indicator lamp (25) and buzzer (26) are also connected to the control circuit (24c). The display lamp (25) and buzzer (26) are connected to the control panel (2).
1).

Next, the operation of this embodiment will be explained. A predetermined amount of washing water is supplied into the washing chamber (2), and when washing starts, the injection nozzle (12) rotates and sprays washing water from the injection port (13), similar to a conventional dishwasher. Then, wash the tableware (20) by pouring washing water on it. At this time, the injection nozzle is (1
Each time 2) rotates, the magnet (28) approaches the reed switch (32) and activates the reed switch (32). On the other hand, the control circuit (24c) detects whether the reed switch (32) is activated within the set time.

If a large amount of residue accumulates in the filter (7) and causes clogging, the circulation amount of cleaning water will decrease, and the rotation speed of the injection nozzle (12) and the amount of cleaning water sprayed from the injection port (13) will decrease accordingly. decreases. When the time required for one rotation of the injection nozzle (12) becomes longer than the time set in the control circuit (24c), a signal is output from the control circuit (24c), the indicator lamp (25) blinks, and a buzzer is activated. (26) to report that normal cleaning is not being performed.

In the embodiment shown in FIG. 6 above, a magnet and a reed switch are used as the flow rate detection means, and in the embodiment shown in FIG. It's okay. Moreover, although each of the above-mentioned embodiments has shown a case where both a notification lamp and a buzzer are provided, either one may be omitted.

[Effects of the Invention] As is clear from the above description, according to the present invention, it is possible to easily detect a decrease in the amount of circulating water due to filter clogging, etc. The washing process does not end at the end, and the tableware can always be thoroughly washed.

[Brief explanation of the drawing]

FIGS. 1, 2, and 3 are front views, perspective views, and electrical block diagrams showing essential parts of embodiments of the present invention, respectively, and FIGS. 4 and 5 are other embodiments of the present invention, respectively. FIGS. 6, 7, and 8 are a front view, a cross-sectional view, an electrical block diagram, and an electrical block diagram showing the main parts of another embodiment of the present invention, respectively. 9 and 10 are a longitudinal sectional view and an electrical block diagram respectively showing other embodiments of the present invention, and FIG. 11 is a longitudinal sectional view showing an example of a conventional dishwasher. In the figure, (1) is the washing machine body, (2) is the washing cabinet, (
4) is the drainage basin, (5) is the water supply port, (B) is the drain port, (
7) is a filter, (10) is a circulation pump, (l l )
, (11c). (lid) is a vibrator, (lla) is a pressure reaction part, (li
d) is the branch pipe, (12) is the injection nozzle, (13) is the injection port, (14) is the drainage pump, (15) is the drainage pump, (16) is the opening, (17) is the door, (19) Hako, (
20) is tableware, (21) is control panel, (2
2) is a magnet, (23) is a Hall element, (24),
(24a), (24b) are the control circuit, (25) is the indicator lamp for notification, (26) is the buzzer for notification (27) is the lid, (28) is the reed switch, (29) is the lead wire, (
30) is a float, (31) is a stopper, (32) is a magnet, (35) is a pressure switch, and (40) is a flow meter. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Patent Attorney Muneharu Sasaki

Claims (4)

[Claims] (1) A washing cabinet consisting of an opening for putting in and taking out tableware, a door for opening and closing the opening, a spray nozzle with a spray port, etc., a drainage basin provided at the bottom of the washing cabinet, and the spray nozzle for cleaning. In a dishwasher consisting of a circulation system for sending water, etc., a pressure reaction part is provided in the circulation system for sending washing water to the injection nozzle and reacts to a change in the pressure of the washing water, and a pressure reaction part that reacts to a change in the pressure of the washing water, What is claimed is: 1. A dishwasher comprising: a pressure detecting means comprising a pressure detecting means; and a notification means that operates in accordance with the state of the pressure detecting means. (2) In place of the above-mentioned washing water pressure detection means and notification means,
The invention is characterized by comprising: a pressure detection means that is provided in a circulation system for sending cleaning water to the injection nozzle and is activated in response to a change in pressure; and a notification means that is activated in response to a state of the pressure detection means. The dishwasher according to claim (1). (3) In place of the above-mentioned washing water change amount detection means and notification means, a flow rate detection means provided in the circulation path that sends the washing water to the above-mentioned injection nozzle, and which operates according to the state of the flow rate detection means. Claim (1) characterized in that it is provided with a notification means for
) Dishwasher listed. (4) A claim characterized in that, in place of the change amount detecting means for the washing water, there is provided means for detecting the rotational speed of the injection nozzle, and a notification means that operates in accordance with the state of the means. The dishwasher described in (1).