JP2007275604A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher which has few failures or the like due to dew condensation water and discharges steam at a low temperature outside. <P>SOLUTION: The dishwasher includes a first blowing means 23 which exhausts the air inside a washing tub 17 through an exhaust port 25, an exhaust pathway 28 which makes the exhaust port 25 and an aperture 27 formed in a dishwasher body 16 communicate, the second blowing means 29 which sends outside air to a mixing chamber 31 arranged in the middle of an exhaust pathway 28, a flow pathway 30 which makes a blowing mouth 29a of the second blowing means 29 and the mixing chamber 31 communicate with each other and a return pathway 33 which returns dew condensation water into the washing tub 17. The dew condensation water can be prevented from infiltrating through the blowing mouth 29a of the second blowing means 29, since a return pathway 33 is formed below the blowing mouth 29a of the second blowing means 29 all over, the dew condensation water returns into the washing tub 17 from the return pathway 33 before a water level of the dew condensation water concentrated on the base of the mixing chamber 31 becomes as high as the blowing mouth 29a of the second blowing means 29. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dishwasher for cleaning and drying dishes and the like.

  Conventionally, this type of dishwasher has been configured as shown in FIG. 4 (see, for example, Patent Document 1). Hereinafter, the configuration will be described.

  As shown in FIG. 4, the washing tub 2 provided in the dishwasher main body 1 housed in the system kitchen has an opening 3 on the upper side, and a table basket 5 that houses the tableware 4 is disposed. A cleaning nozzle 6 is rotatably provided below the tableware basket 5, and the cleaning water stored in the cleaning tank 2 is circulated by the pump 7 and sprayed from the cleaning nozzle 6 to clean the tableware 4.

  Further, an exhaust port 9 is provided in the upper part of the front panel 8 provided in front of the cleaning tank 2, and the air in the cleaning tank 2 is blown by the blowing means 10 via the exhaust path 11 to the exhaust port 9. Drain the tableware 4 further by discharging it outside the machine.

A first rail 12 is fixed below the washing tub 2, and the first rail 12 is supported by a second rail 13 fixed to the dishwasher body 1 so as to be movable in the front-rear direction. . When the tableware 4 is put in and out, the handle 14 provided on the front panel 8 is grasped, the washing tank 2 is pulled forward, and the tableware 4 is accommodated from the upper opening 3. Next, when the washing tub 2 is returned to the dishwasher body 1 and the operation is started, the washing water is heated from the washing nozzle 6 toward the tableware 4 while the washing water is heated by the heater 15 disposed at the bottom of the washing tub 2. A cleaning process is performed to spray and clean the dishes 4. Then, after rinsing the dishes 4, the drying process is performed and the operation is terminated.
JP 2001-046301 A

  However, in the configuration of such a conventional dishwasher, it is necessary to arrange the exhaust port 9 in front of the washing tub 2 in order to discharge the air in the washing tub 2 in a state of being housed in the system kitchen. Further, the air in the cleaning tank 2 discharged from the exhaust port 9 is substantially the same as the temperature in the cleaning tank 2 (about 80 ° C.), and there is a problem that there is a risk of burns in some cases.

  In order to solve this problem, a second air blowing unit made of electrical components or the like is arranged, the outside air is taken in by the second air blowing unit, the outside air and the air in the cleaning tank 2 discharged from the exhaust port 9 There is a method of lowering the temperature of the air discharged to the outside of the machine, but the condensed water generated when the air from the cleaning tank 2 and the outside air during the heating rinsing / drying process are mixed is the second air flow. If it enters the rotating part or charging part of the device and causes a failure due to an increase in the load of the rotating part and a fixed part of the rotating part, or the charged part rusts, the power supply becomes unstable, and operation becomes impossible. There were issues such as.

  The present invention solves the above-mentioned conventional problems, and prevents dew condensation water during the heating rinsing / drying process from entering the second air blowing means, so that there is little failure and it is discharged outside the machine. The object is to stably reduce the air temperature in the cleaning tank 2 and prevent burns of the user.

  In order to solve the above-described conventional problems, a dishwasher according to the present invention includes a dishwasher main body, a washing tank provided in the dishwasher main body and having an exhaust port for exhausting air therein, A first air blowing means for discharging air from the exhaust port; an opening for discharging the air discharged from the exhaust port to the outside of the dishwasher body; an exhaust path communicating the exhaust port with the opening; A second air blowing means for sending outside air to the mixing chamber disposed in the middle of the exhaust path, a blower opening communicating with the air blowing port of the second air blowing means and the mixing chamber, and air discharged from the exhaust opening; A return path for returning the dew condensation water generated when the outside air is mixed into the washing tank, and the return path is formed below the blower opening of the second blowing means over the entire path. Heat rinsing / drying process for a long time Even if the water level of the condensed water collected on the bottom surface of the mixing chamber rises, the condensed water is returned from the return path to the washing tank before the condensed water reaches the height of the air outlet of the second air blowing means. The dew condensation water can be prevented from entering from the air outlet of the second air blowing means, there is little failure, and the high temperature steam discharged from the air outlet is cooled in the mixing chamber. It is possible to stably reduce the temperature of the air when it is burned, and to prevent burns and the like of the user. Further, even if the cleaning water in the cleaning process enters the exhaust path from the exhaust port, it returns to the cleaning tank from the return path, so that the cleaning water enters the air outlet of the second air blowing means located higher than the return path. Can be reliably prevented, and failure can be reduced.

  In the dishwasher of the present invention, even if the temperature of the condensed water collected on the bottom surface of the mixing chamber rises after the heating rinsing / drying process for a long time, the condensed water is at the height of the air outlet of the second blowing means. Since the condensed water is returned from the return path to the washing tank before it becomes, it is possible to prevent the condensed water from entering from the air blowing port of the second air blowing means, there is little failure, and it is discharged from the exhaust port. Since the generated high-temperature steam is cooled in the mixing chamber, it is possible to stably reduce the temperature of the air when it is discharged out of the apparatus and prevent the user from being burned. Further, even if the cleaning water in the cleaning process enters the exhaust path from the exhaust port, it returns to the cleaning tank from the return path, so that the cleaning water enters the air outlet of the second air blowing means located higher than the return path. Can be reliably prevented, and failure can be reduced.

  1st invention is provided in the dishwasher main body, the said dishwasher main body, and the washing tank which has an exhaust port which discharges internal air, The 1st which discharges | emits the air in the said wash tank from the said exhaust port A blowing means, an opening for discharging the air discharged from the exhaust port to the outside of the dishwasher main body, an exhaust path communicating the exhaust port and the opening, and a mixing chamber arranged in the middle of the exhaust path The second air blowing means for sending outside air, the air blowing path communicating with the air blowing port of the second air blowing means and the mixing chamber, and the condensed water generated when the air discharged from the air outlet and the outside air are mixed A return path that returns to the inside of the washing tank, and the return path is formed below the air blowing port of the second air blowing unit over the entire path, and the heating rinsing / drying process is performed for a long time, The level of condensed water collected at the bottom of the mixing chamber Even if the condensation occurs, the condensed water is returned from the return path to the cleaning tank before the condensed water reaches the height of the blowing port of the second blowing unit, so that the condensed water is discharged from the blowing port of the second blowing unit. Can be prevented, there are few failures, and the high-temperature steam discharged from the exhaust port is cooled in the mixing chamber, so the temperature of the air when it is discharged out of the machine can be stably reduced. In addition, it is possible to prevent the user from getting burned. Further, even if the cleaning water in the cleaning process enters the exhaust path from the exhaust port, it returns to the cleaning tank from the return path, so that the cleaning water enters the air outlet of the second air blowing means located higher than the return path. Can be reliably prevented, and failure can be reduced.

  In the second invention, in particular, the return path of the first invention is such that the blower path and the cleaning tank communicate with each other, and the cleaning water that has entered the exhaust path and the cleaning water that has condensed in the exhaust path. Since the condensed water of the steam is returned from the air supply path to the cleaning tank through the return path, the cleaning water does not stay inside the air supply path, and the cleaning water enters the air blowing port of the second air blowing means higher than the return path. Can be reliably prevented, and failure can be reduced.

  In the third invention, in particular, the return path of the first or second invention is such that the mixing chamber and the cleaning tank communicate with each other, and dew condensation occurs in the cleaning water that has entered the exhaust path or in the exhaust path. Since the condensed water of the cleaning water vapor is returned from the mixing chamber to the cleaning tank through the return path, the cleaning water does not stay in the mixing chamber, and the cleaning water does not stay in the mixing chamber, and is supplied to the air outlet of the second air blowing unit located higher than the return path. Intrusion can be reliably prevented, and failure can be reduced.

  According to a fourth aspect of the invention, in particular, the return path of any one of the first to third aspects is configured such that the exhaust path and the cleaning tank communicate with each other. Condensed water of the cleaning water which has condensed inside is returned from the exhaust path to the cleaning tank through the return path, so that it does not stay inside the exhaust path, and the air blowing port of the second blowing means located higher than the return path Therefore, it is possible to reliably prevent the washing water from entering and reduce the failure.

  In the fifth invention, in particular, the bottom surface of the return path of any one of the first to fourth inventions is inclined downward toward the cleaning tank, and when the outside air and cleaning water vapor are mixed. Condensed water generated can be efficiently returned to the washing tank, and this condensed water stays in the exhaust path, resulting in a decrease in drying performance and prevention of condensation outside the machine. A dishwasher that can be prevented and can be used with peace of mind can be provided.

  In the sixth aspect of the invention, in particular, the bottom surface of the air flow path of any one of the first to fifth aspects is inclined downward from the second air blowing means toward the mixing chamber, and dew condensation occurs on the air flow path. Condensed water can also be smoothly collected on the bottom surface of the mixing chamber by the weight of the condensed water or by the blowing by the second blowing means. And, it is possible to prevent intrusion from the air blowing port of the second air blowing means arranged above the bottom surface of the mixing chamber, there is little failure, and the air temperature in the cleaning tank is stabilized when discharged outside the apparatus. It can be reduced and the burn of the user can be prevented.

  In the seventh aspect of the invention, in particular, the washing tub of any one of the first to sixth aspects is provided so as to be freely drawable with respect to the dishwasher main body having an opening at the front, and is accommodated in the system kitchen. The temperature of the air discharged from the front of the washing tub of the dishwasher body can be lowered and the condensed water can be returned to the washing tub, ensuring the safety of the user and feeling of use. Can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a side sectional view of a dishwasher according to Embodiment 1 of the present invention, FIG. 2 is a sectional view of a main part of the dishwasher, and FIG. 3 is a perspective view of an inner surface of a washing tub of the dishwasher.

  1 to 3, the dishwasher main body 16 accommodated in the system kitchen has an opening 16 a for inserting and removing the washing tub 17 at the front, and the washing tub 17 uses the washing tub 17 as a dishwasher. A front panel 26 serving as a door that closes the opening 16a when housed in the main body 16 is provided at the front, and an opening 18 is provided on the upper side. ing. Below the tableware basket 20, there are provided a rotatable cleaning nozzle 21 for injecting cleaning water and a pump 22 for circulating the cleaning water accumulated in the cleaning tank 17 through the cleaning nozzle 21. In addition, a heater 24 for heating the cleaning water and the air blown by the first blower 23 is disposed at the bottom.

  The exhaust port 25 is disposed between the front panel 26 provided in front of the cleaning tank 17 and the cleaning tank 17 so that the air in the cleaning tank 17 is exhausted from the exhaust port 25 by the first blowing means 23. It is configured. The opening 27 is provided above the front panel 26, and the exhaust port 25 and the opening 27 are communicated with each other through an exhaust path 28.

  The second air blowing means 29 has substantially the same capacity as the first air blowing means 23 and takes outside air from an opening (not shown) and sends it to the air blowing path 30 disposed behind the front panel 26. The air blowing path 30 joins in a mixing chamber 31 arranged in the middle of the exhaust path 28, and the air discharged from the cleaning tank 17 and the outside air are mixed in the mixing chamber 31.

  Here, the positional relationship among the air blowing port 29 a of the second air blowing means 29, the air blowing path 30, and the bottom surface of the mixing chamber 31 is higher in the order shown on the left, and the air blowing path 30 is the air blowing port 29 a of the air blowing means 29. The bottom surface of the mixing chamber 31 communicates with a gentle inclined surface. In the mixing chamber 31, the mixed air in which the steam discharged from the exhaust port 25 and the outside air taken in by the second blowing means 29 are mixed is discharged from the opening 27 to the outside of the apparatus. .

  The return hole 32 is formed in the cleaning tank 17 below the air blowing port 29 a of the air blowing means 29, and communicates with the mixing chamber 31 through the return path 33. The bottom surface of the return path 33 is inclined from the mixing chamber 31 toward the return hole 32. Further, an air guide 34 is formed on the return path 33 on the side of the mixing chamber 31 in order to make it easier for the air in the cleaning tank 17 to go to the mixing chamber 31. A shield 35 is formed in the cleaning tank 17 in the cleaning tank 17 of the return hole 32.

  In addition, a temperature detection unit 36 that detects the temperature of the cleaning water is provided at the lower portion of the cleaning tank 17, and the control unit 37 that sequentially controls the cleaning, rinsing, and drying steps is based on a signal from the temperature detection unit 36. The operation time of the air blowing means 23 and the second air blowing means 29 is controlled, and the cleaning tank 17 reaches a certain temperature (for example, 50 ° C.) by the temperature detecting means 36 in the cleaning / rinsing process. When it is detected that the second air blowing means 29 is operated and the drying process is started, the second air blowing means 29 is operated and the first air blowing means 23 is intermittently operated for several minutes and then continuously operated. The operation of the second blowing means 29 is stopped after a certain time has elapsed.

  In addition, a first rail 38 is fixed below the washing tank 17, and the first rail 38 is supported by a second rail 39 fixed to the dishwasher body 16 so as to be movable in the front-rear direction. Yes. When the tableware 19 is put in and out, the handle 40 provided on the front panel 26 is grasped, the washing tub 17 is pulled forward, and the tableware 19 is accommodated from the upper opening 18.

  The operation and action of the dishwasher in the present embodiment configured as described above are as follows.

  First, the user grasps the handle 40 provided on the front panel 26, pulls out the washing tub 17 from the dishwasher main body 16, and sets the dirty tableware 19 in the tableware basket 20 disposed in the washing tub 17. Next, when the washing tub 17 is returned to the dishwasher main body 16 and the operation is started, the washing water is heated from the washing nozzle 21 toward the tableware 19 while the washing water is heated by the heater 24 arranged on the bottom of the washing tub 17. A cleaning process is performed to spray and clean the dishes 19. Thereafter, after rinsing several times, the first air blowing means 23 is heated while the washing water is heated to about 80 ° C. by the heater 24 and the heating rinsing step is performed, and then the air is heated by the heater 24. The heated air containing a lot of moisture is discharged to the outside through the exhaust port 25, the exhaust path 28, and the opening 27, and a drying process for drying the tableware 19 and the cleaning tank 17 is performed to finish the operation.

  During the cleaning process, even if the cleaning water ejected from the cleaning nozzle 21 enters the exhaust path 28 from the exhaust port 25, it returns to the cleaning tank 17 through the return hole 33 through the return path 33.

  In the initial stage of the drying process, heated air containing a large amount of moisture is discharged from the exhaust port 25, but by operating the second blowing means 29 and intermittently operating the first blowing means 23 for several minutes, Since the air volume of the first air blowing means 23 can be easily reduced, the temperature of the air in the cleaning tank 17 discharged from the exhaust port 25 is lowered, and the moisture contained in the air is reduced, so that the air is heated. Burns and condensation outside the machine can be prevented. In addition, the dew condensation water in the mixing chamber 31 that is frequently generated in the initial stage of the drying process for the same reason decreases the pressure in the cleaning tank 17 when the first blower unit 23 is stopped in an intermittent operation. Through the return hole 32 to the cleaning tank 17.

  Further, since the air blowing path 30 communicates the air blowing port 29a of the second air blowing means 29 and the bottom surface of the mixing chamber 31 with a gentle inclination, the condensed water adhering to the air blowing path 30 is caused by its own weight, or The air is blown from the second blowing means 29 so that it can be collected on the bottom surface of the mixing chamber 31 and poured out from the return hole 32 to the cleaning tank 17.

  By collecting the condensed water in the washing tank 17 in this way, the moisture of the air can be reduced, the moisture of the air discharged from the opening 27 can be reduced, and the condensation outside the machine can be prevented. can do.

  Further, since the air discharged from the exhaust port 25 is guided to the mixing chamber 31 by the air guide body 34, the amount of air returning from the return hole 32 to the cleaning tank 17 can be reduced. The discharged air and the outside air sent from the second air blowing means 29 can be mixed efficiently.

  As described above, according to the present embodiment, the dishwasher main body 16, the washing tank 17 provided in the dishwasher main body 16 and having the exhaust port 25 for discharging the air inside, and the air in the washing tank 17. The first air blowing means 23 for discharging the air from the exhaust port 25, the opening 27 for discharging the air discharged from the exhaust port 25 to the outside of the dishwasher main body 16, the communication between the exhaust port 25 and the opening 27 The exhaust passage 28, the second air blowing means 29 for sending outside air to the mixing chamber 31 disposed in the middle of the exhaust passage 28, and the air blowing port 29 a of the second air blowing means 29 and the mixing chamber 31 communicate with each other. A ventilation path 30 and a return path 33 for returning condensed water generated when air discharged from the exhaust port 25 and outside air are mixed into the cleaning tank 17 are provided. The return path 33 extends over the entire path. The second Even if the water level of the condensed water collected on the bottom surface of the mixing chamber 31 is raised by performing the heating rinsing / drying process for a long time due to the formation below the air blowing port 29a of the blowing means 29, the condensed water Since the condensed water is returned to the cleaning tank 17 from the return path 33 before reaching the height of the blowing port 29a of the second blowing means 29, the condensed water enters from the blowing port 29a of the second blowing means 29. It is possible to prevent, there are few failures, the air temperature in the cleaning tank 17 when being discharged out of the machine can be stably reduced, and the burn of the user can be prevented.

  Further, even if the cleaning water in the cleaning process enters from the exhaust port 25 of the cleaning tank 17, it is returned to the cleaning tank 17 from the return path 33, so that the air outlet of the second blower unit 29 located higher than the return path 33. 29a can reliably prevent the intrusion of cleaning water, there is little failure, the air temperature in the cleaning tank 17 is stably reduced when discharged outside the machine, and the user's burns are prevented. be able to.

  Further, since the return path 33 communicates the blowing path 30 and the cleaning tank 17, the cleaning water that has entered the exhaust path 28 and the dew condensation water of the cleaning water that has condensed in the exhaust path 28 are Since it returns to the washing tank 17 through the return path 33 from the air supply path 30, it can be prevented from staying inside the air supply path 30, and the air is cleaned at the air outlet 29 a of the second air blowing means 29 higher than the return path 33. Water can be reliably prevented from entering, and failure can be reduced.

  Further, since the return path 33 communicates the mixing chamber 31 and the cleaning tank 17, the cleaning water that has entered the exhaust path 28 and the dew condensation water of the cleaning water condensed in the exhaust path 28 are Since it is returned from the mixing chamber 31 to the cleaning tank 17 through the return path 33, it can be prevented from staying in the mixing chamber 31, and the second air blower 29 at a higher position than the return path 33 is cleaned at the air outlet 29 a. Water can be reliably prevented from entering, and failure can be reduced.

  Further, since the return path 33 communicates the exhaust path 28 and the cleaning tank 17, the cleaning water that has entered the exhaust path 28 and the dew condensation water of the cleaning water condensed in the exhaust path 28 are Since it is returned from the exhaust path 28 to the cleaning tank 17 through the return path 33, it can be prevented from staying in the exhaust path 28, and the air is blown to the air outlet 29 a of the second blowing means 29 higher than the return path 33. Water can be reliably prevented from entering, and failure can be reduced.

  Further, since the bottom surface of the return path 33 is inclined downward toward the cleaning tank 17, the dew condensation water generated when the outside air and the cleaning water vapor are mixed can be efficiently returned to the cleaning tank 17. The dishwasher that can be used with peace of mind can prevent deterioration of drying performance and condensation outside the machine due to the condensation water staying in the exhaust path 28, and prevent malfunctions and insulation defects due to the ingress of staying water. can do.

  Further, the bottom surface of the air blowing path 30 is inclined downward from the second air blowing means 29 toward the mixing chamber 31, so that the condensed water condensed on the air blowing path 30 is also the weight of the condensed water or the second air blowing means 29. Can be smoothly gathered on the bottom surface of the mixing chamber 31 by blowing air. And the penetration from the air outlet 29a of the 2nd ventilation means 29 arrange | positioned upwards from the bottom face of the mixing chamber 31 can be prevented, there is little failure, and the inside of the washing tank 17 when it discharges | emits outside the apparatus. The air temperature can be stably reduced to prevent user burns and the like.

  Further, the washing tub 17 is provided so as to be freely drawn out of the dishwasher main body 16 having the opening 16a at the front, so that the washing tub 17 can be removed from the front of the washing tub 17 of the dishwasher main body 16 accommodated in the system kitchen. The temperature of the discharged air can be lowered and the dew condensation water can be returned to the washing tank 17, so that the safety of the user can be ensured and the feeling of use can be improved.

  In the dishwasher according to the present invention, even if the temperature of the condensed water collected on the bottom surface of the mixing chamber rises after the heating rinsing / drying process for a long time, the condensed water is high in the air blowing port of the second blowing means. Since the condensed water is returned from the return path to the washing tank before the occurrence of the trouble, it is possible to prevent the condensed water from entering from the air blowing port of the second air blowing means, there is little failure, and from the exhaust port. Since the discharged high-temperature steam is cooled in the mixing chamber, the temperature of the air when discharged to the outside of the machine can be stably reduced, preventing the user from being burned, etc. Even if the cleaning water enters the exhaust path from the exhaust port, the cleaning water is returned to the cleaning tank from the return path, so that it is reliably prevented that the cleaning water enters the air blowing port of the second air blowing unit located higher than the return path. That can reduce the breakdown and dishwashing Without limited, clothes dryer so as to discharge the steam generated outside, can be applied to various apparatuses such as a food dryer.

Side sectional view of the dishwasher according to Embodiment 1 of the present invention. Cross section of the main part of the dishwasher Perspective view of the inside of the washing tub of the dishwasher Side view of a conventional dishwasher

Explanation of symbols

DESCRIPTION OF SYMBOLS 16 Dishwasher main body 16a Opening part 17 Washing tank 23 1st ventilation means 25 Exhaust port 27 Opening 28 Exhaust path 29 2nd ventilation means 29a Blower port 30 Blower path 31 Mixing chamber 32 Return hole 33 Return path

Claims (7)

A dishwasher main body, a washing tank provided in the dishwasher main body and having an exhaust port for discharging the air inside, a first blower means for discharging the air in the cleaning tank from the exhaust port, and the exhaust An opening for discharging the air discharged from the mouth to the outside of the dishwasher main body, an exhaust path communicating with the exhaust opening and the opening, and a second chamber for sending outside air to the mixing chamber disposed in the middle of the exhaust path. Returning the dew condensation water generated when the air and the air discharged from the exhaust port and the outside air are mixed back into the cleaning tank. A dishwasher, wherein the return path is formed below the blower opening of the second blower unit over the entire path. 2. The dishwasher according to claim 1, wherein the return path communicates the blow path and the washing tank. 3. The dishwasher according to claim 1, wherein the return path connects the mixing chamber and the washing tank. The dishwasher according to any one of claims 1 to 3, wherein the return path connects the exhaust path and the washing tank. The dishwasher according to any one of claims 1 to 4, wherein the bottom surface of the return path is inclined downward toward the washing tank. The dishwasher according to any one of claims 1 to 5, wherein a bottom surface of the blowing path is inclined downward from the second blowing means toward the mixing chamber. The dishwasher according to any one of claims 1 to 6, wherein the washing tank is provided so as to be freely drawn out with respect to the dishwasher body having an opening at the front.