JPH0622923U - Dishwasher - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if there is a hole in the hose that connects the air chamber member and the pressure detection means, foreign matter floating in the wash water may adhere to the hose, become clogged, and (EN) Provided is a dishwasher capable of reliably preventing leakage of washing water. A rubber bush 22 is fitted to a protrusion 21 formed on the inner wall of the air chamber 20C of the air reservoir 20, and a float body 23 is provided so as to be floatable. By the cooperation of the float body 23 and the rubber bush 22 which float upward as the water level rises, the air chamber 20C is kept airtight. As a result, even if the detection hose 15 has a hole, the cleaning water W enters the detection hose 15 from the connection portion 24 and the hole 2
It is possible to surely prevent the foreign matter from leaking from No. 5 and the foreign matter after washing floating in the washing water W from adhering to the connecting portion 24 and the detection hose 15 or clogging.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dishwasher for washing dishes by spraying the washing water on the dishes installed in the washing machine body, and in particular, ensuring the amount of washing water in the washing water tank that stores the washing water. It also relates to dishwashers that can detect and prevent malfunctions.

[0002]

[Prior art]

 Conventionally, various dishwashers have been proposed, and examples of those having a detection device for detecting the amount of wash water in a wash water tank include, for example, the dishwasher disclosed in Japanese Utility Model Laid-Open No. 64-46715. The machine is known. The dishwasher described in this publication is provided with an air trap that communicates with the cleaning tank through a communication member such as a hose, and a built-in diaphragm and pressure-sensitive conductive rubber that communicate with the air trap through the hose. A diaphragm chamber is installed to allow the pressure-sensitive conductive rubber to output a water level signal through the diaphragm due to the pressing force generated in the air in the air trap when the water level in the cleaning water tank rises. By this, the water level of the wash water in the wash water tank is detected. However, in the conventional dishwasher described above, since the air trap is communicated with the cleaning water tank through the communication member, dirty water containing foreign matters such as leftovers and dirt after cleaning enters the communication member. As a result, there is a possibility that the above-mentioned foreign matter may be attached to the communication section or the air trap or clogged.

Further, if foreign matter adheres to the communication member or the air trap or becomes clogged as described above, it becomes impossible to reliably detect the water level in the cleaning water tank. For example, if the communication member is clogged when the water level signal from the pressure-sensitive conductive rubber is off, it is not possible to detect the full level of the wash water in the wash water tank, which causes the wash water tank to wash. Only after the water supply is repeated, it is not possible to perform the subsequent dish washing operation. On the other hand, if the communication level material is clogged when the water level signal from the pressure-sensitive conductive rubber is on, even if the cleaning water in the cleaning water tank is completely drained and the cleaning tank is empty, the water level signal It will erroneously detect that the water level is full based on the ON state. As a result, when there is a heater for heating the wash water, there is a risk that the heater will be idle and the wash water pump will idle.

In order to eliminate such inconvenience, it may be possible to adopt a configuration as shown in FIG. FIG. 4 is an enlarged sectional view showing an air reservoir portion provided in the wash water tank. An air reservoir 2 is attached to a side wall 1A of the wash water tank 1 in which the wash water W is stored. The air reservoir 2 has an air chamber 3 whose upper surface is closed and whose lower surface is open, and a connecting portion 4 which communicates with the air chamber 3 is provided. The connecting portion 4 is fitted in the mounting hole 5 of the side wall 1A of the wash water tank 1. The connecting portion 4 is connected to one end of the hose 6, and the other end of the hose 6 is connected to the pressure detection switch 7. In such a configuration, when the wash water W is supplied into the wash water tank 1, the water level of the wash water W in the air chamber 3 gradually rises as the water level of the wash water W rises. As the water level rises, the air in the air chamber 3 is compressed, and the compressed air whose internal pressure has increased is supplied to the pressure switch 7 via the hose 6. Then, as shown in FIG. 4, in response to the fact that the water level of the wash water W in the wash water tank 1 has reached the full level L, the water level of the wash water W in the air chamber 3 is indicated by the broken line A ( When the pressure switch 7 is raised to a position lower than the connection portion 4), the pressure switch 7 is turned on by the compressed air supplied from the connection portion 4 through the hose 6, and the cleaning operation is started.

As described above, according to the configuration shown in FIG. 4, since the pressure switch 7 is turned on when the water level of the wash water W in the air chamber 3 rises to the position of the broken line A, It is possible to prevent the existing foreign matter from entering the connecting portion 4 and the hose 6 and adhering or clogging.

[0006]

However, even in the dishwasher shown in FIG. 4, the hose 6 connected between the connection portion 4 of the air reservoir 2 and the pressure detection switch 7 deteriorates or corrodes due to long-term use. There is a risk that the holes 8 will be formed due to the above (see FIG. 5). If the hole 8 is formed in the hose 6 in this way, the air compressed in the air chamber 3 will leak out from the hole 8. As a result, the water level of the wash water W in the air chamber 3 rises to a position B above the position shown by the broken line A as shown in FIG. 5, which causes the wash water W to leak from the holes 8. There is a problem that foreign matter floating in the cleaning water W may be attached to the connection portion 4 or the hose 6 or clogged. Moreover, if the wash water W leaks from the hole 8 as described above, it is possible that the leaked wash water W will hit the electric parts arranged around the hose 6 and cause an electric leakage accident.

The present invention has been made in order to solve the problem of the prior art described above. Even when the hose connecting the air chamber member and the pressure detecting means has a hole, foreign matter floating in the washing water is prevented. To prevent the washing water from sticking or clogging inside the hose and to prevent the washing water from leaking through the hole, and to detect the level of the washing water in the washing water tank without causing an electric leakage accident. The purpose is to provide a dishwasher that can

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is a dishwashing machine for washing dishes by spraying the washing water stored in the washing water tank to the dishes installed in the washing machine body. And an air chamber member attached to the side wall of the wash water tank, and a float member disposed inside the air chamber member and floating according to the water level of the wash water in the air chamber member, An airtight member that is attached to the inner wall of the air chamber member and maintains the air chamber member in an airtight state in cooperation with the float member, a hose whose one end is connected to the air chamber member, and a hose other than the hose. And a pressure detecting means connected to the end.

[0009]

[Action]

 In the present invention having the above configuration, when the wash water is stored in the wash water tank at the time of water supply, the air enclosed in the air chamber member is compressed as the level of the wash water in the wash water tank rises. The water level of the washing water in the air chamber member gradually rises. As the water level rises, the float member arranged in the air chamber member also rises. Then, when the water level of the washing water in the air chamber member exceeds a certain position, the air compressed in the air chamber member and having an increased internal pressure is supplied to the pressure detecting means via the hose, which causes the pressure detecting means. Detects that the level of wash water in the wash water tank has reached a certain level. After that, the dishwashing operation is performed based on the detection signal from the pressure detecting means. On the other hand, if the hose has a hole due to long-term use or the like, the air compressed in the air chamber member will leak out from the hole as described above. At this time, the internal pressure of the air in the air chamber member decreases as the air leaks, so that the water level of the wash water in the air chamber member rises. In this way, when the water level of the washing water rises in the air chamber member, the float member also rises accordingly, whereby the float member comes into contact with the airtight member attached to the inner wall of the air chamber member. As a result, the inside of the air chamber member is kept airtight by the cooperation of the float member and the airtight member, and the water level of the washing water in the air chamber member does not rise.

[0010]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side sectional view of the dishwasher according to the present embodiment, and the washer body 1 is a box-shaped body composed of an outer box 2 and an inner box 3. Further, a panel switch 4 is provided at an upper position in front of the main body 1 of the washing machine (on the left side in FIG. 1), and the panel switch 4 is provided with a switch 5 for instructing to start driving a washing pump P described later. It is being done. Further, an opening / closing door 6 is provided below the panel switch 4, and the door 6 is opened when storing and taking out dishes 7 to be described later from the main body 1 of the washing machine, while the dishes 7 are opened. It will be closed during the cleaning process.

A cupboard 8 for placing dishes 7 to be washed is provided inside the inner box 3. Further, a pair of sprinklers 9 and 10 are arranged at the upper and lower positions of the cupboard 8, and the upper sprinkler 9 has a sprinkle hole 9A and is arranged in a gap S between the outer box 2 and the inner box 3. It is connected to the washing pump P via a connecting hose 11. Further, the lower water sprinkler 10 has a water sprinkling hole 10A like the upper water sprinkler 9 and penetrates a washing water tank 13 (described later) of the inner box 3 through the connecting pipe 12 to contact the washing pump P. Has been continued. Each of these sprinklers 9 and 10 sprays the wash water W from the sprinkle holes 9A and 10A to the tableware 7 when the wash pump P is operated based on the water level signal from the pressure detection switch 16 described later. .

Further, a wash water tank 13 is provided below the inner box 3, and the wash water W is supplied to the wash water tank 13 from a hot water supply tank (not shown) via a hot water supply pump. . In the wash water tank 13, an air reservoir 20 is arranged in a mounting hole 13A formed in a side wall 13B of the wash water tank 13 on the left side in FIG. As shown in the enlarged sectional view of FIG. 2, the air reservoir 20 is composed of a box-shaped body having an upper surface closed by a closing plate 20A and an opening 20B provided on the lower surface, and an air chamber 20C is provided inside. Has been. Further, a protrusion 21 is formed along the periphery of the inner wall of the air chamber 20C at a substantially central position in the vertical direction of the air reservoir 20, and the protrusion 21 is made of a flexible rubber material. The rubber bush 22 is fitted. A float body 23 is disposed below the protrusion 21 in the air chamber 20C, and the float body 23 is made of a material having a specific gravity smaller than that of water and has a cylindrical cross section. . As a result, the float body 23 can float as the water level of the wash water W rises and falls in the air chamber 20C, and as the water level of the wash water W rises, the float body 23 comes into contact with the rubber bush 22 to cooperate with the rubber bush 22. It works to keep the inside of the air chamber 20C airtight. Further, on the side wall on the left side in FIG. 2 in the air reservoir 20, a connecting portion 24 is provided at a position slightly above the protruding portion 21 so as to communicate with the air chamber 20C. It is fitted into a mounting hole 13A formed in the side wall 13B of the tank 13.

Further, one end of the detection hose 15 is connected to the connecting portion 24, and a pressure detection switch 16 is connected to the other end of the detection hose 15. With such a configuration, as the cleaning water W is stored in the cleaning water tank 13, the water level of the cleaning water W in the air chamber 20C rises, so that the air existing in the air chamber 20C of the air reservoir 20 is increased. The compressed air is supplied from the connecting portion 24 to the pressure detection switch 16 via the detection hose 15. Then, the pressure detection switch 16 has a constant internal pressure of the compressed air (when the cleaning water W supplied into the cleaning water tank 13 reaches the full level shown by the broken line L in FIG. 1), the air chamber 20C 2 corresponds to the internal pressure of the compressed air supplied from the air chamber 20C to the pressure detection switch 16 via the detection hose 15 when the water level of the washing water W reaches the position shown by the broken line C in FIG. Is turned on. Based on the ON signal from the pressure detection switch 16, the hot water supply pump of the hot water supply tank is closed.

Further, a supply end 17A of a supply hose 17 for supplying the cleaning water W to the cleaning pump P faces the bottom of the cleaning water tank 13, and a drain end 17B of the supply hose 17 has a drain end 17B. Is connected to the cleaning pump P through the bottom of the. As a result, the cleaning pump P supplies the cleaning water W to the sprinklers 9 and 10 based on the ON signal from the pressure detection switch 16. The supply end 17A is covered with a mesh-like dust removing member 19 to prevent dust and the like from entering the cleaning pump 13.

A heater 18 for heating the wash water W is attached to the right side position in FIG. 1 in the wash water tank 13, and the heater 18 heats the wash water in the wash water tank 13 as well. The temperature is kept constant. Next, the operation of the dishwasher configured as above will be described. Here, it is assumed that the wash water W is not initially supplied to the wash water tank 13, and thus the lower end portion of the float body 23 arranged in the air chamber 20C is slightly exposed from the opening 20B. In this state, the pressure detection switch 16 is held in the off state.

First, the opening / closing door 6 is opened, and the dirty dishes 7 are arranged on the cupboard 8 as shown in FIG. Then, after closing the opening / closing door 6, the switch 5 on the panel switch 4 is pressed. Based on the switch signal from the switch 5, the hot water supply pump of the hot water supply tank is opened, and the supply of the wash water W from the hot water supply tank is started. As the cleaning water W is supplied, the cleaning water W is gradually stored in the cleaning water tank 13. Thus, as the wash water W is stored in the wash water tank 13, the water level of the wash water W in the air chamber 20C of the air reservoir 20 gradually rises through the opening 20B. Along with this, the air present in the air chamber 20C is gradually compressed, and as a result, the air whose internal pressure has increased is supplied from the connection portion 14B to the pressure detection switch 16 via the detection hose 15. However, at this point, as described above, the operating condition of the pressure detection switch 16 is that the inside of the air chamber 20C when the wash water W reaches the full level L (shown by the broken line in FIG. 2) in the wash water tank 13 is reached. Since it corresponds to the internal pressure of the air (corresponding to the water level C of the wash water W), the pressure detection switch 16 receives only the air pressure close to the atmospheric pressure and is still kept in the off state. After that, when the water level of the wash water W reaches the full water level L in the wash water tank 13, the water level of the wash water W in the air chamber 20C becomes the water level shown by the broken line C. As a result, the air in the air chamber 20C is further compressed, and the compressed air is supplied from the connecting portion 24 to the pressure detection switch 16 via the detection hose 15. As a result, the pressure detection switch 16 is switched from the off state to the on state.

Based on the ON signal from the pressure detection switch 16, the hot water supply pump is switched from the open state to the closed state, and the supply of the wash water W from the hot water supply tank is stopped. At the same time, the operation of the cleaning pump P is started. When the cleaning pump P starts its operation in this way, the cleaning water W in the cleaning water tank 13 is cleaned by the dirt removing member 19 to remove dirt and the like, and then the supply end 17A of the supply hose 17 is connected to the drain end 17B. The water is supplied to the water sprinkler 9 via the hose 11, and to the water sprinkler 10 from the supply end 17A through the drain end 17B and the connecting pipe 12. As a result, the cleaning water W is sprayed from the water spray holes 9A of the water spray device 9 and the water spray holes 10A of the water spray device 10 onto each tableware 7, and the tableware 7 is cleaned. Such cleaning is performed for a fixed time (tens of seconds) measured by a timer or the like. After the washing of the dishes 7 is completed as described above, the rinsing operation of the dishes 7 is started.

After such cleaning, when the pressure detection switch 16 reaches the water level of the cleaning water W in the air chamber 20C to the water level indicated by the broken line C (which is set below the position of the connecting portion 24). Since the air is turned on in response to the internal pressure of the compressed air supplied from the air chamber 20C via the detection hose 15, foreign matter floating in the cleaning water W after cleaning adheres to the connection part 24 and the detection hose 15. It will never be clogged or clogged. Therefore, the water level of the wash water W in the wash water tank 13 can always be detected via the pressure detection switch 16.

In the rinsing operation, the hot water supply pump of the hot water supply tank is opened again, and 4 to 6 l of cleaning water W for rinsing is supplied to the cleaning water tank 13. At this time, since the cleaning water W after cleaning is stored in the cleaning water tank 13 in a substantially full state, the cleaning water W supplied from the hot water supply tank via the hot water supply pump is supplied from the overflow portion (not shown). The water is stored in the wash water tank 13 while overflowing. By supplying such cleaning water W, the cleaning water W after cleaning is cleaned. Then, after a certain amount of water has been supplied as described above, the hot water supply pump is closed and water supply is stopped. After that, the washing pump P is operated again, and the washed dishes 7 are rinsed. This rinsing operation is carried out for a certain period of time measured by a timer or the like as described above, after which the operation of the washing pump P is stopped and the rinsing operation ends. Following this, when further cleaning the dirty dishes 7, the opening / closing door 6 is opened to take out the dishes 7 washed as described above, and the dishes 7 to be washed are placed on the dish rack 8 If the door 6 is closed and the switch 5 of the panel switch 4 is pushed down after being placed on the top, the same cleaning and rinsing operations as described above are performed.

After the washing of each tableware 7 is finished, when the dirty water in the washing water tank 13 in which foreign matters are floating is discharged to the outside of the main body 1 of the washing machine, a drain valve is provided through a drain lever (not shown). If opened, the sewage will be discharged to the outside of the main body 1 of the washing machine through the drain valve. On the other hand, the operation when the detection hose 15 has a hole 25 as shown in FIG. 3 due to deterioration and corrosion due to long-term use or the like will be described. When the hole 25 is formed in the detection hose 15 in this way, as the air in the air chamber 20C is compressed as the cleaning water W is supplied to the cleaning water tank 13, the compressed air is connected to the connection portion. 24 enters the detection hose 15 and leaks out of the detection hose 15 through the hole 25. In this way, when the compressed air leaks out from the hole 25, the internal pressure in the air chamber 20C becomes low, so that the water level of the cleaning water W rises above the position indicated by the broken line C through the opening 20B (indicated by the broken line D in FIG. 4). Up to).

The float body 23 also floats upward as the water level of the cleaning water W rises in the air chamber 20C. As a result, the upper portion of the float body 23 is fitted to the protrusion 21. The rubber bush 22 is brought into contact with and adheres to the lower portion of the rubber bush 22. In this state, the float body 23 and the rubber bush 22 cooperate with each other to keep the portion of the air chamber 20C above the rubber bush 22 (which communicates with the connecting portion 24) in an airtight state. Therefore, the internal pressure in the upper portion of the air chamber 20C is kept constant when the float body 23 and the rubber bush 22 are in contact with each other, and the air is prevented from leaking from the hole 25, and at the same time, the air chamber is prevented. The water level of the cleaning water W in 20C does not rise above the position of the broken line D. As a result, even when the detection hose 15 has a hole 25, the cleaning water W is prevented from entering the detection hose 15 through the connection portion 24 and leaking out of the cleaning water W from the hole 25. The foreign matter after washing floating in the water W is prevented from adhering to the connecting portion 24 and the detection hose 15 or clogging.

As described in detail above, in the dishwasher according to this embodiment, the rubber bush 22 is fitted to the protrusion 21 formed on the inner wall of the air chamber 20C of the air reservoir 20 and the float body is formed. 23 is provided so as to be floatable, and the float body 23 that floats upward as the cleaning water W rises in the air chamber 20C and the rubber bush 22 cooperate to keep the air chamber 20C airtight. Therefore, even if the detection hose 15 has a hole 25, it is possible to prevent the wash water W from entering the detection hose 15 from the connection portion 24 and leaking the wash water W from the hole 25. In addition, it is possible to reliably prevent the foreign matter after washing floating in the washing water W from adhering to the connecting portion 24 and the detection hose 15 or clogging. As a result, it is possible to reliably prevent an electric leakage accident caused by the cleaning water W being applied to the electric parts arranged around the detection hose 15, and to ensure the water level of the cleaning water W in the cleaning water tank 13. It can be detected by.

The present invention is not limited to the above-described embodiments, and it goes without saying that various improvements and modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the rubber bush 22 made of flexible rubber is fitted to the protruding portion 21, but the surface of the float body 23 is covered with rubber having sufficient flexibility. It is clear that the same effect can be obtained with. In this case, the rubber bush 22 is unnecessary.

[0024]

[Effect of device]

 As described above, according to the present invention, even if there is a hole in the hose connecting the air chamber member and the pressure detecting means, foreign matter floating in the wash water may adhere to the hose or become clogged. It is possible to provide a dishwasher capable of reliably preventing the wash water from leaking from the hole and reliably detecting the water level of the wash water in the wash water tank without causing an electric leakage accident. The effect to be shown is great.

[Brief description of drawings]

FIG. 1 is a side sectional view of a dishwasher.

FIG. 2 is an enlarged sectional view of an air reservoir portion.

FIG. 3 is an enlarged sectional view of an air reservoir portion showing a floating state of a float body.

FIG. 4 is an enlarged sectional view of an air reservoir portion in a conventional dishwasher.

FIG. 5 is an enlarged cross-sectional view showing the action of an air reservoir portion in a conventional dishwasher.

[Explanation of symbols]

1 ... Washer main body, 7 ... Tableware, 9, 10 ... Sprinkler, 13 ... Wash water tank, 15 ... Detection hose, 16 ... Pressure detection switch, 20 ... Air reservoir,
20C ... Air chamber, 21 ... Projection, 22 ... Rubber bush, 23 ... Float body, W ... Wash water

Claims (1)

[Scope of utility model registration request] 1. A dishwasher for washing dishes by spraying wash water stored in a wash water tank onto the dishes installed in the main body of the washing machine, wherein air is enclosed inside the dishwasher. An air chamber member attached to a side wall of the wash water tank; a float member disposed inside the air chamber member and capable of floating according to the level of the wash water in the air chamber member; and an inner side wall of the air chamber member. Attached to the air chamber member in cooperation with the float member to keep the air chamber member in an airtight state, a hose having one end connected to the air chamber member, and a pressure detection device connected to the other end of the hose. A dishwasher, comprising: