JP2008178624A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher, in which the number of piping connection parts or control items in production is/are reduced compared to a conventional apparatus. <P>SOLUTION: A water level detection device 41 and a drain trap 61 are provided to adjoin each other through a partition plate 32a that is lower than an outer wall of a unit case 32, sharing the outer wall and a lid member 33 covering the outer wall. The lower part of water level detection device 41 is connected to a drain pump through a drain pump delivery tube, and an air vent nipple communicating with a cleaning tank is provided at an upper part. The drain trap 61 penetrates the unit lid member 33 at one end to extend upward, and is connected to a drain tube 7, while the other end has an intermediate tube 62 provided close to and above a bottom part of the unit case 32. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dishwasher, and more particularly to the integration of a water level detection device and a drain trap.

In conventional dishwashers, the water level detector and the drain trap are placed in the equipment as independent functional parts, so the pipe connection point is the pipe on the water level detector side, two places at both ends, the drain trap There were two places on both sides of the pipe on the side.
Moreover, since the water level detection device and the drain trap are separate bodies, there are many contents to be managed at the time of production such as drawings and specifications of parts (for example, see Patent Document 1).

JP 2002-125905 A (paragraphs 0019 to 0020, 0026, FIGS. 1 and 3)

  In the conventional dishwasher described in Patent Document 1, since the water level detection device and the drain trap are arranged in the equipment as independent functional parts, the number of pipe connection locations and the number of management items at the time of production are As a result, many parts had to worry about water leakage.

  The present invention was made in order to solve such problems, and a water level detection device for detecting the water level in a washing tank, and prevents odors and pests generated from a house drain pipe from entering the inside of the device. The purpose is to obtain a dishwasher that integrates a drainage trap to reduce the number of pipe connection points and the number of management items during production.

  The dishwasher according to the present invention includes a cleaning tank for storing an object to be cleaned, a cleaning mechanism for cleaning the object to be cleaned stored in the cleaning tank with cleaning water, and a drainage mechanism for discharging the cleaning water from the cleaning tank. And a water level detection device that detects the water level in the cleaning tank, the drainage mechanism includes a drainage pump and a drainage pipe that discharges cleaning water from the drainage pump, and the drainage pipe is a sewer pipe of the house. It is connected to a certain house drain pipe, is provided with a drain trap that prevents intrusion of odors and pests generated from the house drain pipe, and is an integrated water level detection device and the drain trap.

  According to the dishwasher of the present invention, a water level detection device for detecting the water level in the cleaning tank, and a drain trap for preventing odors and pests generated from the house drain pipe from entering the inside of the device, As a result, the number of pipe connection points and management items during production is reduced, and as a result, the number of places where water leaks can be reduced.

Embodiment 1 FIG.
1 is a longitudinal sectional view of a dishwasher according to the present invention, FIG. 2 is a block diagram of the internal piping of the dishwasher, FIG. 3 is a front view of the dishwasher, and FIG. 4 is the dishwasher. FIG. 5 is a cross-sectional view (from the front side) of the water level detection unit of FIG. 4, and FIG. 5 is a cross-sectional view (from the bottom surface side) of the water level detection unit of the dishwasher. 4 is a cross-sectional view taken along the line BB in FIG. 4 of the water level detection unit of the dishwasher, and FIG. 7 is a cross-sectional view taken along the line CC of FIG. 4 of the water level detection unit of the dishwasher.

  As shown in FIG. 1, the dishwasher 1 is inside the casing 2 and the casing 2 that are externally disposed, and above the cleaning tank 3 and the cleaning tank 3 that are containers for cleaning and drying the dishes 81. There are a lid 4 for closing the opening of the cleaning tank 3, a door 5 attached to the front of the cleaning tank 3, a design part and an operation part, and many functional parts. It is a device, and the water level detection unit 31 is one of its functional components.

  As shown in FIG. 1, the water level detection unit 31 is structurally located inside the door 5 and is located between the drain pump 6 and the drain pipe 7 in terms of the drainage path. As shown in FIG. 4, it is configured in a sealed container shape by two parts, a unit case 32 and a unit lid 33, and its interior is partitioned into two parts, a water level detection device 41 and a drain trap 61, by a partition wall 32a. It has been.

Here, first, components and parts constituting the water level detection device 41 will be described with reference to FIGS. 4 and 5.
The float 42 shown in FIGS. 4 and 5 floats on the washing water sent via the drainage pump 6 and the like in FIG. 1, and a guide hole 42a for passing a detector holding pipe 44 described later is formed in the center. The formed donut shape is made of a foamed resin having a specific gravity smaller than that of water.
The magnet 42b shown in FIG. 4 is for operating a detector 43 described later, and has the same donut shape as the float 42 and is incorporated in the float 42.
The blades 42 c are for receiving a swirling flow of cleaning water, which will be described later, and rotating the float 42. A plurality of blades 42 c are formed on the bottom surface of the float 42.

The detector 43 is an element (for example, a reed switch) that reacts with magnetism, and detects the floating of the float 42, that is, the water level in the cleaning tank 3.
The detector holding tube 44 guides the holding of the detector 43 and the vertical direction of the float 42. The detector holding tube 44 has a cylindrical shape in which the upper part is open and the lower part is closed and penetrates the unit lid 33. It is formed on the lid 33 itself.
The slit 44 a fixes the signal line 43 a of the detector 43, and is formed in a shape that leaves a cylindrical portion below and above the unit lid 33 in the opening above the detector holding tube 44.
In addition, although it described that the cylindrical part was left below, this is because the inside of the detector holding tube 44 in which the detector 43 that is an electrical component is held even if water drops on the upper surface of the unit lid 33. This is to make the embankment work so that water does not enter.
The detector fixing tool 45 is used to fix the detector 43 inserted into the detector holding tube 44 and prevent water from entering from above, and has a cap shape and has an opening above the detector holding tube 44. It is mounted in a state that covers.

The float chamber 46 is an operation space of the float 42 that operates to detect the water level in the cleaning tank 3, and is a substantially cylindrical portion of one of the unit cases 32 partitioned by the partition wall 32 a.
The inlet nipple 46a is used for connection to the drainage pump water discharge pipe 8, and guides the wash water sent through the drainage pump 6 of FIG. 1 to the float chamber 46, below the float chamber 46, and As shown in FIG. 5, it is formed at the tangential position of the float chamber 46 having a substantially cylindrical shape.
The purpose of this is to generate a swirling flow by flowing the wash water pressurized and sent from the drainage pump 6 along the inner wall of the float chamber 46 during the drainage process.

The float pedestal 46 b supports the float 42 when not levitating, and is formed in a protruding shape below the float chamber 46.
In addition, although it described as the shape which protrudes, this is because the residual water which remains in the float chamber 46 should not have the influence on the float 42 even if dirt with high viscosity should be included, or mold | fungi generate | occur | produce. It is to do.
The cylindrical water channel 46c shown in FIG. 4 or 6 is for stabilizing the swirl flow described above, and is a groove-like portion formed over the entire circumference between the periphery of the float base 46b and the inner wall of the float chamber 46. It is.
The dent 46d aligns the centers of the detector holding tube 44 and the float chamber 46, and evenly secures the operating space of the float 42 formed between the periphery of the detector holding tube 44 and the inner wall of the float chamber 46. Therefore, it is for inserting the lower end of the detector holding tube 44, and is formed at the center of the float base 46b.

Next, parts and parts constituting the drain trap 61 will be described with reference to FIGS.
The middle pipe 62 guides the washing water sent through the water level detection device 41 to the drain pipe 7 in FIG. 4. The middle pipe 62 has a cylindrical shape whose upper and lower sides are open and penetrates the unit lid 33. In shape, it is formed on the unit lid 33 itself.
The outlet nipple 62 a is used for connection to the drain pipe 7, and is a portion of the middle pipe 62 that protrudes above the unit lid 33.
The trap chamber 63 in FIG. 4 is a space for storing sealed water that prevents odors and pests generated from the house drain pipe 82 shown in FIG. 2 from entering the inside of the equipment through the water distribution pipe 7 as shown in FIG. Thus, it is a substantially cylindrical part of one of the unit cases 32 partitioned by the partition wall 32a of FIG.
In this configuration, the sealed water depth H is from the upper end of the partition wall 32a to the lower end of the middle tube 62.

The air bleed nipple 64 shown in FIG. 4 is used for connection to the air bleed pipe 9 as shown in FIGS. 1, 2, and 7, and communicates the inside of the float chamber 46 with the non-submerged space of the cleaning tank 3. This is for the unit lid 33 itself.
Although details will be described later, the air vent nipple 64 functions in both the water level detection device 41 and the drain trap 61.

Hereinafter, with reference to the functions of the water level detection unit 31 described above, that is, the water level detection device 41 and the drain trap 61, the operation when the dishes are washed and dried by the dishwasher according to the present invention will be described with reference to FIGS. Description will be made mainly using FIG.
First, the tableware 81 to be washed and dried is stored in the tableware basket 10 of FIG. 1, an appropriate amount of detergent is put in the vicinity thereof, and the door 5 is closed.
Next, the operation switch 12 provided in the operation unit 11 in FIG. 3 is pressed to start the operation of the device.
The operation is controlled by the control device 13 in FIG. 1, and each functional component is operated in accordance with the command, and the cleaning process, the rinsing process, the heating rinsing process, and the drying process are performed in this order.

When the above-described cleaning process is started, first, the water supply valve 14 in FIG. 1 is opened, and water is supplied into the cleaning tank 3. At this time, since the drainage pump is still stopped, the supplied wash water is washed until the water level of the wash tank 3 and the water level of the water level detection unit 31 are equalized by the natural force of the atmospheric pressure acting isotropic everywhere. 3 is sent to a water level detection device 41 for monitoring the water level in 3 through a drainage pump suction pipe 15, a drainage pump 6, and a drainage pump spout pipe 8 connected to the bottom of the washing tank 3. As shown in FIG. 4, the sent washing water enters the float chamber 46 from the inlet nipple 46a, the float 42 floats by the washing water, and the magnet 42b incorporated in the inside of the detector 42 has the inside of the detector holding tube 44. When approaching the detector 43, it is detected that the water level has reached a predetermined level by turning on the reed switch of the detector 43, and the water supply valve 14 in FIG. 1 is closed by a command from the control device 13 in FIG.
If the air vent nipple 64 is not provided, the drain trap 61 exists downstream, so that the air in the float chamber 46 cannot be removed. If the pressure of the air increases to some extent, the intrusion of the washing water is hindered. Therefore, it is impossible to receive the cleaning water, but this is enabled by the effect of the air bleeding nipple 64.
As a matter of course, the water levels of the cleaning water in the cleaning tank 3 and the water level detection device 41 are equal, and this system has no problem.

Next, the heater 16 in FIG. 1 is energized to heat the stored wash water, and the wash pump 17 in FIG. 1 is energized to apply pressure to the wash water, and the tableware 81 using the nozzle 18 in FIG. Spray on.
The cleaning is performed while circulating the stored cleaning water. The cleaning water dropped to the bottom of the cleaning tank 3 is collected, pressure is applied again by the cleaning pump 17, and the nozzle 18 is used to spray the dishes 81. It repeats that.
Further, the cleaning water temperature is monitored by the water temperature detecting element 19 in FIG. 1, and when it is detected that the temperature has reached a predetermined temperature, the energization of the heater 16 is stopped.

When the cleaning process is started and a predetermined time has elapsed, the energization of the heater 16 and the cleaning pump 17 is stopped, and the drainage pump 6 of FIG. 1 is energized to drain the cleaning water stored in the cleaning tank 3 to the outside. .
At this time, the wash water pressurized and sent from the drainage pump 6 flows in from the inlet nipple 46 a through the drainage pump water discharge pipe 8 shown in FIG. 4 or 5, and runs along the inner wall of the float chamber 46. The flow changes to a stable swirl flow in the cylindrical water channel 46c of FIG. This swirl flow fills the float chamber 46 of FIG. 4 and flows toward the subsequent drain trap 61. At the same time, the float 42 is vigorously rotated by the effect of the blade 42c of FIG. 4 or FIG.

  Thereby, not only the float 42 itself but also the gap between the detector holding tube 44 and the guide hole 42a and the entire interior of the float chamber 46 can be washed away cleanly. The water level detection device 41 is a movable part in which the float 42 operates. However, since the water level detection device 41 is exposed to dirty cleaning water, it is easy for dirt to accumulate. is there. Therefore, keeping the interior clean and clean is the best treatment for stable operation.

When drainage is started and a predetermined time elapses, the energization of the drainage pump 6 in FIG. 1 is stopped. At this time, the washing water that has not passed through the drain trap 61 in FIG. 4 is accumulated inside the drain trap 61, seals the house drain pipe 82 and the inside of the device in FIG. 2, and odors and pests enter the inside of the device. To prevent.
If a negative pressure is generated in the house drain pipe 82 of FIG. 2 during operation, the air in the drain pipe 7 flows toward the house drain pipe 82 without the air vent nipple 64, and then drains. The sealed water in the trap 61 and the cleaning water in the cleaning tank 3 flow out, causing a problem of emptying the heater 16.
However, since air in the non-submerged space of the cleaning tank 3 can be taken in by the effect of the air vent nipple 64, the sealing water in the drain trap 61 flows out partially, but the cleaning water in the cleaning tank 3 flows out. In addition, there is no possibility that the heater 16 is blown.

Next, although the rinsing process is started, the basic operation is almost the same as the cleaning process, and this rinsing process is repeated several times.
As a matter of course, as the rinsing process is repeated, the contamination of the washing water is reduced and eventually becomes clean washing water.
Therefore, finally, the inside of the water level detection device 41 can be washed away with clean washing water including the air bleed nipple 64 of FIG. 4, and no stains that cause malfunctions remain.

When the washing and rinsing steps as described above are completed, the final drying step is started.
First, current is applied to the blower 20 of FIG. 1 to apply pressure to the air, and hot air is sprayed from the tank blower opening 3a of FIG.
Then, the air sent from the tank blower port 3a passes through the inside of the cleaning tank 3, and is discharged from the exhaust port 5a of FIG. 1 to the outside of the device through the tank exhaust port 3b of FIG.
When the drying process is started and a predetermined time elapses, energization of the blower 20 is stopped.

It is a longitudinal cross-sectional view of the dishwasher which concerns on this invention. It is an internal piping block diagram of the same dishwasher. It is a front view of the same dishwasher. It is a cross-sectional view (from the front direction) of the water level detection unit of the same dishwasher. It is AA sectional drawing (from the lower surface direction) in FIG. 4 of the water level detection unit of the dishwasher. It is BB sectional drawing in FIG. 4 of the water level detection unit of the same dishwasher. It is CC sectional drawing in FIG. 4 of the water level detection unit of the same dishwasher.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Tableware washing machine, 2 housing | casing, 3 washing tank, 3a tank ventilation port 3b tank exhaust port, 4 cover body, 5 door, 5a exhaust port, 6 drainage pump, 7 drainage pipe, 8 drainage pump water discharge pipe, 9 air vent Pipe, 10 Tableware basket, 11 Operation part, 12 Operation switch, 13 Control device, 14 Water supply valve, 15 Drain pump water intake pipe, 16 Heater, 17 Washing pump, 18 Nozzle, 19 Water temperature detection element, 20 Blower, 31 Water level detection unit 32 unit case, 32a partition, 33 unit lid, 41 water level detector, 42 float, 42a guide hole, 42b magnet, 42c blade, 43 detector, 43a signal line, 44 detector holding tube, 44a slit, 45 detection Fixture fixture, 46 float chamber, 46a inlet nipple, 46b float pedestal, 46c cylindrical waterway, to 46d See, 61 drain trap, middle tube 62, 62a outlet nipple, 63 trap chamber 64 air vent nipple 81 dishes, 82 houses drain.

Claims (6)

A cleaning tank for storing objects to be cleaned;
A cleaning mechanism for cleaning an object to be cleaned contained in the cleaning tank with cleaning water;
A drainage mechanism for discharging cleaning water from the cleaning tank;
A water level detection device for detecting the water level in the washing tank,
The drainage mechanism includes a drainage pump and a drainage pipe for discharging washing water from the drainage pump,
The drain pipe is connected to a house drain pipe which is a sewer pipe of a house, and includes a drain trap for preventing invasion of odors and pests generated from the house drain pipe,
A dishwasher, wherein the water level detection device and the drain trap are integrated. The outer wall of the water level detection device and the outer wall of the drain trap are covered with a common lid and bottom, and are provided adjacent to each other via a partition plate whose height is lower than the outer wall,
The drain trap includes a middle pipe that extends upward through the lid, has one end connected to the drain pipe, and the other end near the bottom and above the bottom.
The water level detection device is connected to the drainage pump in a part of the outer wall,
2. The dishwasher according to claim 1, further comprising an air vent pipe which communicates with the washing tank above. A drain pump discharge pipe connecting the water level detection device and the drain pump;
The dishwasher according to claim 2, wherein an inner surface of an outer wall of the water level detection device is connected to an inner surface of the drainage pump discharge pipe at a tangential position. The water level detection device is
A float that is formed in a donut shape and has a lower density than water,
A substantially cylindrical detector holding pipe that is provided upright through the hollow portion of the float and has a water level sensor that detects the position of the float at a predetermined position inside;
A pedestal provided around the detector holding tube so as to protrude above the bottom, and
4. The dishwasher according to claim 2, wherein the float slides up and down between the pedestal and the lid along the detector holding tube. 5.   5. The dishwasher according to claim 4, wherein the float includes blades.   6. The dishwasher according to claim 2, wherein the detector holding tube extends upward through the lid.

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