JP2007307027A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher capable of preventing a burn by heated air discharged to the outside and dew condensation inside a washing tub and outside a machine by lowering humidity while lowering the temperature of air from the washing tub discharged from an exhaust port easily even after executing a course without drying. <P>SOLUTION: After the execution of the course without drying is ended, by executing control so as to change the operation time or/and air flow rate of a first blowing means 22 and a second blowing means 28 along the time progress of air discharge by the first or/and second blowing means 22 and 28, the humidity is lowered while lowering the temperature of the air discharged to the outside and a burn by the heated air and the dew condensation inside the washing tub 16 and outside the machine are prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

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

  Conventionally, this type of dishwasher has been configured as shown in FIG. Hereinafter, the configuration will be described.

  As shown in FIG. 2, the washing tub 2 provided in the dishwasher main body 1 accommodated in the system kitchen has an opening 3 on the upper side, and a table basket 5 for accommodating the tableware 4 is arranged. A rotatable cleaning nozzle 6 is 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 at 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 exhausted from the exhaust port 9 to the outside by the blower means 10. 4 drying is performed.

  A first rail 11 is fixed to the side portion of the washing tub 2, and the first rail 11 is supported by a second rail 12 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 13 provided on the front panel 8 is grasped, the washing tub 2 is pulled forward, and the tableware 4 is accommodated from the upper opening 3. Next, when the washing tub 2 is pushed back into the dishwasher main body 1 and the operation is started, the washing water is heated by the heater 14 arranged at the bottom of the washing tub 2, and the heated washing water is supplied from the washing nozzle 6 to the tableware. A cleaning process is performed to spray the dishes 4 and remove the stains on the dishes 4. Then, after rinsing tableware 4, a drying process is performed and operation is ended (for example, refer to patent documents 1).

In addition, this type of dishwasher usually performs a drying process after the rinsing process in addition to a normal course in which a series of processes from the washing process to the drying process are continuously performed. There are various courses such as a course without drying and a course with only drying without performing a washing / rinsing process.
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 to the outside while being housed in the system kitchen. There is. Further, the air in the cleaning tank 2 discharged from the exhaust port 9 is almost the same as the temperature in the cleaning tank 2, and there is a problem that there is a risk of burns in some cases.

  In addition, air that contains a lot of moisture is discharged at the initial stage of the drying process, so the temperature of the body is high and it tends to cause burns, and the temperature difference from the outside air causes condensation outside the machine. Had.

  Further, in the cleaning / rinsing process, when the cleaning water temperature is high (about 50 ° C.), the cleaning water vapor leaks from the exhaust port 9 and condenses on the front panel 8 in which the exhaust port 9 is disposed. It was.

  In particular, when operating on a course without drying that does not perform a drying process after completion of the heating rinse process, this condensed water cannot be evaporated by exhausting the air dried in the drying process from the exhaust port 9, which is a major problem. It was.

  Further, when the outside air is mixed in the exhaust port 9, the amount of air in the cleaning tank 2 discharged by the blowing means 10 and the amount of outside air to be mixed cannot be adjusted. In order to lower the temperature of air with a lot of moisture, a large amount of outside air is required with respect to the air in the cleaning tank 2, and to that end, the amount of outside air is increased or the amount of air discharged in the cleaning tank 2 is reduced. Is required. In order to increase the amount of outside air more than necessary, it is necessary to increase the capacity of the air blowing means 10, and as a result, the air blowing means 10 becomes large, and in order to store as much tableware 4 as possible in a limited space. Was very useless.

  The present invention solves the above-described conventional problem, and even after the course without drying, the temperature of the air from the cleaning tank that is easily discharged from the exhaust port is lowered and the humidity is lowered and discharged. An object of the present invention is to provide a dishwasher capable of preventing burns caused by heated air and condensation outside the machine.

  In order to solve the above-described conventional problems, a dishwasher according to the present invention includes a washing tub for storing tableware, a washing nozzle disposed in the washing tub for washing the tableware, and air in the washing tub. First air blowing means for discharging air to the outside through the exhaust port, second air blowing means for mixing outside air into the air exhausted from the exhaust port, and control for sequentially controlling each step of washing, rinsing and drying And the control means is capable of executing a non-drying course in which the drying process after the rinsing process is not performed, and controls the operation of the first or / and the second air blowing means so that there is no drying. Even in the course run, the temperature of the air in the washing tank that is easily discharged from the exhaust port is lowered, the humidity is lowered, and the heated air discharged from the opening provided in the front causes burns and outside of the machine Prevent condensation It can be.

  The dishwasher of the present invention can reduce the humidity while lowering the temperature of the air in the washing tank that is easily discharged from the exhaust port even when the course without drying is performed. Can prevent burns caused by heated air and condensation outside the machine.

  1st invention discharges the air in the said washing tank outside the machine through an exhaust port to the washing tank which accommodates tableware, the washing nozzle which is distribute | arranged in the said washing tank and wash | cleans the said tableware Air blowing means, a second air blowing means for mixing outside air into the air discharged from the exhaust port, and a control means for sequentially controlling each step of washing, rinsing and drying, the control means comprising a rinse The air in the cleaning tank that can be easily discharged from the exhaust port by controlling the operation of the first and / or second air blowing means while enabling the course without drying without performing the drying process after the process. While the temperature is lowered, the humidity is lowered and it is possible to prevent burns due to heated air discharged from the opening provided in the front surface and condensation on the outside of the machine such as the kitchen work top and the front panel.

  According to a second aspect of the present invention, in the first aspect, after the execution of the non-drying course, the control means, together with the progress of the air discharge time by the first or / and the second blower means, By controlling to change the operation time or / and the air volume of the second air blowing means, the temperature of the air in the cleaning tank easily discharged from the exhaust port can be lowered, the humidity can be lowered, and heated air can be used. Burns and condensation outside the machine can be prevented. In addition, it is possible to efficiently exhaust the damp air in the washing tank as the air discharge time progresses, and it is possible to exhaust all the damp air in the washing tank. Condensation can be prevented.

  According to a third invention, in the first or second invention, the control means controls the time or / and the duty ratio of the intermittent operation of the first or / and the second air blowing means, thereby controlling the first or / and Since the air volume can be adjusted by intermittently operating the second air blowing means, it is possible to efficiently use the electric power and reduce the temperature of the air in the cleaning tank easily discharged from the exhaust port, while maintaining the humidity. Can be lowered.

  In a fourth aspect based on the third aspect, the control means intermittently operates the first air blowing means and continuously operates the second air blowing means until the first predetermined time after the execution of the course without drying. By doing so, it is possible to increase the contamination of the outside air, reduce the temperature of the air exhausted from the cleaning tank, reduce the humidity, and prevent burns due to heated air.

  According to a fifth invention, in the third or fourth invention, the control means continuously operates the first air blowing means after the second predetermined time after the execution of the course without drying, and the second air blowing. By intermittently operating the means, it is possible to reduce the mixing of outside air, to easily discharge the air in the cleaning tank, to discharge the moist air in the cleaning tank and to prevent condensation in the cleaning tank.

  6th invention is equipped with the heater which heats the washing water or air in a washing tank in 1st-5th invention, and a control means does not energize the said heater after completion | finish of execution of a course without drying. Thereby, the temperature of the air discharged | emitted from the inside of a washing tank can be made low, and consumption of electric power can be suppressed.

  According to a seventh invention, in the first to sixth inventions, there is provided temperature detecting means for detecting the temperature in the cleaning tank, and the control means is based on the temperature detected by the temperature detecting means. And by controlling the second air blowing means, the predetermined time of operation of the first air blowing means and / or the second air blowing means, the time of intermittent operation, and the time limit are changed according to the temperature in the washing tank, and the washing is performed. The temperature and humidity of the air in the tank can be discharged from the exhaust port under optimum conditions.

  In an eighth aspect based on the seventh aspect, the control means controls the first blower means and / or the second blower means based on the temperature detected by the temperature detection means during the heating rinse in the rinsing process. In each course having different heating and rinsing temperatures, the predetermined time of operation of the first air blowing means and / or the second air blowing means, the time of intermittent operation, and the time limit are changed according to the temperature of the heat rinsing, and the inside of the washing tank The air temperature and humidity can be discharged from the exhaust port under optimum conditions.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a cross-sectional view of the dishwasher according to the first embodiment of the present invention. In FIG. 1, reference numeral 15 denotes a dishwasher main body housed in a system kitchen and provided with a washing tub 16 therein. The washing tub 16 has an opening 17 on the upper side and a table basket 19 for containing tableware 18. It is arranged. A cleaning nozzle 20 for jetting cleaning water is rotatably provided below the tableware basket 19, and the cleaning water stored in the cleaning tank 16 is pumped to the cleaning nozzle 20 by a pump 21, and the tableware is supplied from the cleaning nozzle 20. It injects toward 18. In addition, a heater 23 for heating the cleaning water and the air blown by the first blowing means 22 is disposed at the bottom.

  The exhaust port 24 is disposed between the front panel 25 provided in front of the cleaning tank 16 and the cleaning tank 16, and exhausts the air in the cleaning tank 16 from the exhaust port 24 by the operation of the first blowing means 22. It is configured as follows. Reference numeral 26 denotes an opening provided in the front panel 25, which communicates with the exhaust port 24 via the exhaust path 27, and discharges air discharged from the exhaust port 24 to the outside of the machine.

  The second blower means 28 has substantially the same capacity as the first blower means 22 and is configured to communicate outside air to a blower path 29 disposed behind the front panel 25 and blow the air to the opening 26. The air passage 29 is arranged so as to be in surface contact with the exhaust passage 27 in the front-rear direction, and is configured so that the air discharged from the cleaning tank 16 and the outside air are mixed in the opening 26.

  Further, a temperature detection means 30 for detecting the temperature of the cleaning water or the cleaning tank 16 is provided at the lower part of the cleaning tank 16, and the control means 31 for sequentially controlling the cleaning, rinsing and drying processes is supplied from the temperature detection means 30. The operation time of the first blowing means 22 and the second blowing means 28 is controlled by the signal.

  When operating on a normal course in which a series of processes from the cleaning process to the drying process are continuously performed, the second air blow is performed when the temperature detecting means 30 detects a certain temperature (for example, 50 ° C.) in the cleaning / rinsing process. When the operation of the means 28 is started and the drying process is started, the second air blowing means 28 is operated and the first air blowing means 22 is intermittently operated for several minutes and then continuously operated. The second air blowing means 28 is intermittently operated.

  In the case of driving in a course without drying after the heating rinsing process is not performed, the temperature detection means 30 maintains a constant temperature (for example, 50 ° C.) in the cleaning / rinsing process as in the case of the normal course. When detected, the second blowing means 28 is operated, and after the heating rinse in the final stage of the rinsing process is completed, the first blowing means 22 and the second blowing means 28 are operated as follows to open the front panel 25. The control means 31 is configured to discharge the air in the cleaning tank 16 from the apparatus 26 to the outside.

  Moreover, the 1st rail 32 is fixed to the both sides | surfaces of the washing tank 16, and the 1st rail 32 is supported by the 2nd rail 33 fixed to the dishwasher main body 15 so that a parallel movement is possible in the front-back direction. Yes. When the tableware 18 is put in and out, the handle 34 provided on the front panel 25 is grasped, the washing tank 16 is pulled forward, and the tableware 18 is accommodated from the upper opening 17.

  The operation and action of the dishwasher in the above configuration in the course without drying are as follows.

  First, the user grasps the handle 34 provided on the front panel 25, pulls out the washing tub 16 from the dishwasher main body 15, and sets the dirty tableware 18 in the dish basket 19 disposed in the washing tub 16 through the opening 17. .

  Next, when the washing tub 16 is pushed back to the dishwasher main body 15 and a course without drying is selected and the operation is started, the washing water is heated by the heater 23 arranged on the inner bottom of the washing tub 16, and the heated washing water is The pump 21 is pumped to the cleaning nozzle 20 and sprayed from the cleaning nozzle 20 toward the tableware 18 to perform a cleaning process for removing dirt from the tableware 18. Thereafter, after rinsing several times, a heating and rinsing process is performed while heating the washing water by the heater 23, and the execution of the course without drying is completed.

  After the execution of the course without drying, the first air blowing means 22 and the second air blowing means 28 are operated while changing the operation time or / and the air volume as the air discharge time advances as follows.

  First, as the first stage, since the first minute is immediately after heating and rinsing, the air in the cleaning tank 16 is considerably high in both temperature and humidity. Therefore, the control means 31 controls the air intake ratio to be high. To do. The first blowing means 22 is intermittently operated with an ON duty ratio of 20% (for example, 0.4 seconds on, 1.6 seconds off), and the second blowing means 28 is continuously operated.

  In this first stage, heated air containing a large amount of moisture is discharged from the exhaust port 24 of the cleaning tank 16 by the first air blowing means 22, but the second air blowing means 28 is operated and the first air blowing means 22 is operated. By intermittently operating the air blowing means 22, the air volume of the first air blowing means 22 can be easily reduced, so that the temperature of the air in the cleaning tank 16 easily discharged from the exhaust port 24 is changed to the second air blowing air. By reducing the outside air supplied by the means 28 and reducing the moisture in the exhausted air, it is possible to prevent burns and condensation outside the machine due to heated air. Condensation outside the machine can be prevented.

  Moreover, since the air volume can be adjusted by intermittently operating the first air blowing means 22, it is possible to prevent burns due to heated air and condensation outside the apparatus while efficiently using electric power.

  Next, as the second stage, the air in the cleaning tank 16 slightly decreases in temperature and humidity during 1 to 8 minutes, so the duty ratio of ON of intermittent operation of the first blowing means 22 is increased, Change to 30% (eg, 0.6 seconds on, 1.4 seconds off). The 2nd ventilation means 28 continues a continuous operation. In this second stage, by controlling differently from the first stage, the humid air in the cleaning tank 16 can be efficiently discharged in accordance with the progress of the air discharge time, and the humid air in the cleaning tank 16 can be discharged. Therefore, condensation in the cleaning tank 16 after completion of the course without drying can be prevented.

  In the final third stage, the temperature and humidity of the air in the cleaning tank 16 are considerably reduced. Therefore, the first blowing means 22 is continuously operated in order to exhaust the air positively and completely. At this time, the second blowing means 28 is intermittently operated (for example, 0.3 seconds on, 2.5 seconds off). In this way, the humid air in the cleaning tank 16 can be efficiently discharged as the time of air discharge progresses, and air is exhausted from the opening 26 more than necessary when the temperature in the cleaning tank 16 is lowered. Can be prevented. Further, it is possible to prevent the moist air exhausted from the cleaning tank 16 from flowing backward through the air blowing path 29 and being dewed and damaged by the second air blowing means 28.

  In all of these first to third stages, the heater 23 is turned off.

  The temperature of the air in the cleaning tank 16 immediately after the end of the course without drying varies in the range of about 50 ° C. to 80 ° C. depending on the temperature selection of the user's cleaning or rinsing. In the case of plastic tableware having a low heat-resistant temperature, a low-temperature course is selected. In this case, the temperature is about 50 ° C., and when a sterilization course is selected, the temperature is as high as 80 ° C.

  Therefore, the temperature detection means 30 provided on the bottom outer wall of the cleaning tank 16 detects the temperature of the cleaning water or the temperature of the air inside the cleaning tank 16, and based on this detection temperature, the first blower means 22 and the second air blowing means 22. The intermittent operation time and duty ratio of the air blowing means 28, the air volume determined by them, and the times of the first to third stages are changed.

  The duty ratio of the first air blowing means 22 in the first stage and the second stage is controlled to be lower so that the higher the detected temperature is, the greater the outside air intake ratio by the second air blowing means 28 is. The time ratio of the two stages is increased with respect to the third stage. It is also a method to control the time of each stage longer than at low temperatures.

  In the present embodiment, the air volume of the first air blowing means 22 and the second air blowing means 28 is changed between continuous operation and intermittent operation, that is, depending on the operation time. The air volume may be changed by changing the rotation speed.

  In the present embodiment, as the best mode, both the first air blowing means 22 and the second air blowing means 28 are optimally combined for operation control, but only one of them is operated. However, the same effect can be obtained.

  Further, in the present embodiment, it is described that the exhaust by the first blowing unit 22 and the second blowing unit 28 is executed after the execution of the non-drying course. However, the execution and setting of the non-drying course are also included up to this exhaust. Even so, they are equivalent.

  As described above, according to the present embodiment, even when a course without drying is performed, the humidity can be reduced while lowering the temperature of the air in the cleaning tank that is easily discharged from the exhaust port. It is possible to prevent burns due to heated air discharged from the provided opening and condensation in the cleaning tank and outside the machine. Even in the case of a dishwasher built in a predetermined position of the kitchen, the temperature of the air discharged to the front surface is low, so that safety can be further improved.

  As described above, the dishwasher according to the present invention has a low temperature and humidity of the air discharged from the front exhaust port, and thus can improve safety. In addition to a dishwasher, the present invention can be applied to various devices such as dryers and cooking appliances that emit and handle water vapor.

Sectional drawing of the dishwasher in Embodiment 1 of this invention Cross-sectional view of a conventional dishwasher

Explanation of symbols

DESCRIPTION OF SYMBOLS 15 Dishwasher main body 16 Washing tank 18 Tableware 20 Washing nozzle 22 1st ventilation means 24 Exhaust port 26 Opening 27 Exhaust path 28 2nd ventilation means 29 Blower path 30 Temperature detection means 31 Control means

Claims (8)

A cleaning tank for storing tableware, a cleaning nozzle arranged in the cleaning tank for cleaning the tableware, a first air blowing means for discharging the air in the cleaning tank to the outside through an exhaust port, and A second air blowing unit that mixes outside air into the air discharged from the exhaust port; and a control unit that sequentially controls each of the cleaning, rinsing, and drying processes, and the control unit performs a drying process after the rinsing process. A dishwasher that makes it possible to execute a course without drying and that controls the operation of the first and / or second blowing means. After the execution of the non-drying course, the control means is configured to operate the first air blowing means and the second air blowing means with the progress of time of air discharge by the first air blowing means or / and the second air blowing means. The dishwasher according to claim 1, wherein the dishwasher is controlled to change the air flow. The dishwasher according to claim 1 or 2, wherein the control means controls the time or / and duty ratio of the intermittent operation of the first or / and second air blowing means. 4. The dishwasher according to claim 3, wherein the control means intermittently operates the first air blowing means and continuously operates the second air blowing means until the first predetermined time after the execution of the course without drying. 5. The dishwasher according to claim 3, wherein the control means continuously operates the first air blowing means and intermittently operates the second air blowing means after the second predetermined time after the execution of the course without drying. The dishwasher according to any one of claims 1 to 5, further comprising a heater for heating washing water or air in the washing tank, wherein the control means does not energize the heater after completion of the course without drying. The temperature detection means which detects the temperature in a washing tank is provided, and a control means controls a 1st ventilation means or / and a 2nd ventilation means based on the detected temperature of the said temperature detection means. The dishwasher of any one of Claims. 8. The dishwasher according to claim 7, wherein the control means controls the first air blowing means and / or the second air blowing means based on a temperature detected by the temperature detecting means at the time of heating and rinsing in the rinsing process.