JP4321365B2 - dishwasher - Google Patents

Description

  The present invention relates to a dishwasher that performs cleaning by spraying cleaning water onto tableware or the like.

  Conventionally, a general dishwasher is configured as shown in FIG. Hereinafter, the configuration will be described. As shown in FIG. 4, the dishwasher main body 1 has a washing tub 2 provided therein, and water or hot water is supplied into the washing tub 2 by a water supply valve 3. A drainage hole 4 is provided at the bottom of the washing tank 2, and a washing pump 5 that is connected to the drainage hole 4 and is driven by a motor is attached, and washing water is jetted from the washing nozzle 6 by the washing pump 5. It is configured to circulate inside. Further, the drain hole 4 is provided with a residue filter 7 for collecting the residue. A temperature detection means 8 composed of a thermistor is provided at the bottom of the cleaning tank 2.

  That is, the cleaning water supplied into the cleaning tank 2 passes through the residual filter 7 and is sucked into the cleaning pump 5 and supplied from the cleaning pump 5 to the cleaning nozzle 6 provided at the inner bottom of the cleaning tank 2. The washing water sprayed from the washing nozzle 6 circulates along a route that returns to the drain hole 4 after washing the tableware 9 and the like. At this time, the residue or the like dropped from the tableware 9 flows into the residue filter 7 together with the washing water, and the residue having a size that cannot pass through the residue filter 7 is collected by the residue filter 7.

  Further, a heater 10 for heating the cleaning water is provided between the cleaning nozzle 6 and the bottom of the cleaning tank 2, and tableware 9 and the like can be neatly arranged above the cleaning nozzle 6 so that the cleaning water is effectively supplied. A tableware basket 11 configured to be sprayed on the tableware 9 is installed for efficient cleaning. Further, the drain pump 12 discharges cleaning water through the drain hose 13 to the outside of the machine.

There has also been proposed a dishwasher having a water particle generation mechanism for improving cleaning performance, including an enzyme, and improving the cleaning performance by swelling of contaminants and the action of the enzyme (see, for example, Patent Document 1). .
JP 2000-189375 A

  However, in these conventional configurations, it is not possible to wash all the stains washed by the dishwasher. In particular, it is not good for dishes that are directly heated and cooked with scorch. For example, gratin, chawanmushi, etc. Further, even those having a water particle generation mechanism were effective only for specific contamination.

  The present invention solves the above-mentioned conventional problems, greatly improves the cleaning performance, and can clean dishes that could not be cleaned by the conventional method. The purpose is to demonstrate tremendous cleaning ability.

In order to achieve the above-mentioned object, the present invention provides a cleaning tank for storing tableware, a water supply means for supplying cleaning water used in a cleaning process, a cleaning pump for pumping cleaning water, and a cleaning pumped by the cleaning pump. A cleaning nozzle that sprays water onto tableware, a heating unit that heats the cleaning water, a temperature detection unit that detects the room temperature of the cleaning tank and the temperature of the feed water, and a mist generating unit that attaches a fine detergent solution to the tableware A pre-treatment process in which the detergent mist of fine particles is scattered by the mist generating means, and a main cleaning process in which a cleaning pump is driven after the pre-treatment process to inject cleaning water onto tableware, and the mist is generated in the pre-treatment process. Temperature detection means at the start of operation
The driving time of the heating means and the mist generating means in the pretreatment step is controlled by the detected temperature T0 of the stage and the detected temperature T1 of the temperature detecting means after a predetermined time has elapsed from the start of operation .

Accordingly, the cleaning performance can be greatly improved by the surface- active force of the fine particle detergent mist by having a pretreatment process for adhering the fine particle detergent mist to contaminants adhering to tableware and the like. Since the surface active force of the fine particle detergent mist is proportional to the temperature, the cleaning performance can be further improved by controlling the driving of the mist generating means according to the temperature detected by the temperature detecting means. The fine particle detergent mist is heavier than air and stays in the lower part of the washing tank. However, by controlling the drive of the heating means according to the temperature detected by the temperature detecting means, upward convection is generated in the washing tank and the detergent mist is removed. The washing tank can be efficiently filled to further improve the washing performance.

  Also, when the ultrasonic oscillating device is used as the mist generating means provided at the lower part of the cleaning tank, the amount of mist generated is inversely proportional to the water level. By setting the level of the cleaning water supplied to be equal to or lower than the predetermined level of mist generation, the amount of mist generated can be increased and the cleaning performance can be further improved.

The dishwasher of the present invention has a pretreatment process in which fine particle detergent mist adheres to contaminants adhering to tableware and the like, so that the washing performance can be greatly improved. The cleaning performance can be further improved by controlling the driving of . In addition, the amount of mist generated and the filling of the mist into the cleaning tank can be ensured regardless of the room temperature and the temperature of the supplied water, and stable cleaning performance can be obtained.

1st invention is a washing tank which stores tableware etc., a water supply means which supplies washing water used at a washing process, a washing pump which pumps washing water, and washing water pumped from a washing pump to tableware etc. A cleaning nozzle for spraying, a heating means for heating the cleaning water, a temperature detection means for detecting the room temperature of the cleaning tank and the temperature of the feed water, and a mist generating means for adhering a fine particle detergent solution to tableware, etc. A pretreatment process in which fine particle detergent mist is scattered by the generating means, and a main cleaning process in which the washing pump is driven after the pretreatment process to inject cleaning water onto tableware, and the mist generating means and the heating means are provided in the pretreatment process. driven by the detected temperature T1 of the temperature detecting means after a predetermined and sensed temperature T0 of the temperature detecting means at the start of operation from the operation starting time, the heating means and the miss in the pretreatment step By controlling the driving time of the generating means, it is possible to greatly improve the cleaning performance allows control to maximize the surface activity possessed by detergent mist particles. In addition, the amount of mist generated and the filling of the mist into the cleaning tank can be ensured regardless of the room temperature and the temperature of the supplied water, and stable cleaning performance can be obtained.

  According to a second invention, in the first invention described above, the mist generating means is composed of an ultrasonic oscillator provided at the lower part of the cleaning tank, and pre-treats the mist generation predetermined water level for obtaining a predetermined amount of mist generation. By setting the water level of the cleaning water supplied in the process to be equal to or lower than the predetermined water level for mist generation, the amount of mist generated can be increased and further cleaning performance can be improved.

  According to a third aspect of the present invention, in the second aspect of the present invention, the level of the cleaning water supplied in the pretreatment step is set to a mist generation predetermined level or lower, and the water supply means is driven in the main cleaning step to set the water level to the mist generation predetermined level or higher. As a result, the amount of mist generated can be increased and an optimum pretreatment process can be performed. In addition, in this process, by supplying water, it is possible to prevent air fouling of the pump and the like, and a stable cleaning performance can be obtained. .

According to a fourth aspect of the present invention, in the first to third aspects of the invention, the detected temperature T of the temperature detecting means at the start of operation.
0 is lower than a predetermined temperature, which has a longer while at mist generating means driven in the pretreatment step, was stable to ensure the filling of the room temperature is low even if the mist generation amount and the mist in the cleaning tank Cleaning performance can be obtained.

According to a fifth invention, in the first to fourth inventions, when the detected temperature T1 of the temperature detecting means at the start of operation is lower than a predetermined temperature, the mist generating means driving time and the heating means driving time in the pretreatment process When the temperature of the supplied water is low, the amount of mist generated and the filling of the mist into the cleaning tank can be ensured and stable cleaning performance can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code, and abbreviate | omits description. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
1 is a longitudinal sectional view of a dishwasher according to Embodiment 1 of the present invention, FIG. 2 is a front view of the dishwasher, and FIG. 3 is an enlarged sectional view of a mist generating means of the dishwasher. The mist generating means 14 scatters a high-concentration detergent solution obtained by dissolving a detergent with a small amount of water into the washing tank 2 and attaches the scattered fine particle detergent mist to the tableware 9 or the like.

  Specifically, as shown in FIG. 3, the mist generating means 14 includes an ultrasonic oscillation device 15, a case 16 that protects the ultrasonic oscillation device 15 from dirt, a transmission fluid 17 enclosed in the case 16, a case, 16 includes a cover 18 that covers 16. The cover 18 is provided with a hole 19 through which the generated mist passes. The cover 18 also serves as a detergent container, and has a detergent charging part 21 so that the detergent 20 does not touch the case 16 directly. The temperature detection means 22 is a thermistor provided on the lower surface of the cleaning tank 2 and detects the temperature of the cleaning water and the temperature of the machine body.

The dishwasher in the present embodiment has a pretreatment process in which the detergent solution is scattered on the tableware and the like 9 by the mist generating means 15 and is left in the pretreatment process. After supplying water below the water level 23 , the mist generating means 15 is driven to scatter the fine particle detergent mist. The supplied cleaning water is heated by a heater (heating means) 10 to generate convection in the cleaning tank 2 and to effectively fill the cleaning tank 2 with the detergent mist.

  Further, when the cleaning water is heated by the heater 10 in the pretreatment process, the pretreatment is performed by the detection temperature T0 of the temperature detection means 22 at the start of operation and the detection temperature T1 of the temperature detection means 22 after a predetermined time after the operation starts. The driving time of the mist generating means 14 and the driving time of the heater 10 in the process are controlled.

The operation and action of the above configuration will be described. First, a standard amount of detergent 20 is placed in the detergent charging part 21 of the mist generating means 14 and operation is started. Water is supplied from a water supply valve (water supply means) 3 to a mist generation predetermined water level 23 or less for obtaining a predetermined mist generation amount. In this case, the predetermined amount of water supply is set by a water amount detection means (not shown) that detects the amount of water. However, the water supply valve 3 having a constant flow rate may supply water for a predetermined time. Since the mist generation amount is inversely proportional to the water level, the mist generation amount can be increased by setting the water level lower than the mist generation predetermined water level 23 for obtaining the predetermined mist generation amount, and further effects can be expected.

Next, when the ultrasonic oscillating device 15 of the mist generating means 14 is driven as a pretreatment step, ultrasonic waves are transmitted through the transmission liquid 17 and the case 16 to generate mist containing detergent components from the water surface. Since the detergent is put in the cover 18 of the mist generating means 14, the cleaning water in the cover 18 has a very high detergent concentration. Therefore, a mist having a high detergent concentration is generated, and the detergent mist having a high concentration of fine particles is scattered in the cleaning tank 2. The fine-particle and high-concentration detergent mist adheres to the tableware 9 and the like, and the fine-particle detergent mist adheres to the tableware and the like 9 chemically by the surface activity of the fine-particle and high-concentration detergent mist. . For this reason, it becomes possible to raise the stain | pollution | contamination which adhered to tableware, especially stain | pollution | contamination, such as a lipstick and tea astringency, from the tableware surface.

  In the pretreatment process, when the detected temperature T0 at the start of operation, that is, when the room temperature is low, the driving time of the mist generating means 14 and the driving time of the heater 10 in the preprocessing process are lengthened, and the temperature is detected after a predetermined time has elapsed after the operation is started When the detected temperature T1 of the means 22, that is, the feed water temperature is low, the driving time of the mist generating means 14 and the driving time of the heater 10 in the pretreatment process are lengthened. Specifically, the control is performed as shown in (Table 1).

Since the surface activity of the fine particle detergent mist is proportional to the temperature, the driving time of the mist generating means is increased when the detection temperature T0, that is, the room temperature is low, and when the detection temperature T1, that is, the water temperature is low, depending on the detection temperature of the temperature detection means. Therefore, the cleaning performance can be further improved. In addition, the fine particle detergent mist is heavier than air and stays in the lower part of the washing tank. Thus, upward convection is generated to efficiently fill the cleaning tank with the detergent mist, thereby further improving the cleaning performance. As a result, regardless of the room temperature or the temperature of the supplied water, the amount of mist generated and the filling of the mist into the cleaning tank can be ensured and stable cleaning performance can be obtained.

  In the present embodiment, both the driving time of the mist generating means 14 and the driving time of the heater 10 in the pretreatment process are lengthened to improve the maximum cleaning performance, but only one of the times is set. Even when the length is increased, the same effect of improving the cleaning performance can be obtained.

Further, in the main cleaning step after the high-concentration detergent mist of fine particles is scattered from the mist generating means 14 in the pretreatment process, water is supplied for a predetermined time from the water supply valve 3 so that the cleaning pump 5 does not generate air debris or the like. The generated water level is 23 or higher. In this embodiment, water is supplied for a predetermined time, but a predetermined amount of water may be set by a water amount detecting means (not shown) for detecting the amount of water. Thereby, the capability of the cleaning pump 5 can be exhibited stably, and a stable cleaning performance can be always obtained. When the water supply is completed, the heater 10 is energized to heat the cleaning water. Here, cleaning is performed by spraying cleaning water from the cleaning nozzle 6 by the cleaning pump 5. At this time, it effectively cleans 9 stains such as tableware that has been lifted by the action of detergent mist with high concentration of fine particles.

As described above, in the present embodiment, the mist generating unit 14 has a pretreatment process in which the fine particle detergent mist is scattered on the tableware 9 and the like, and the temperature detection unit 22 outputs the mist generating unit 14 and the heater 10. By controlling at least one of the driving, it is possible to control the surface activity of the fine particle detergent mist to the maximum, and the cleaning performance can be greatly improved.

In addition, with respect to the mist generation predetermined water level 23 for obtaining a predetermined mist generation amount, the water level of the cleaning water supplied in the pretreatment process is set to the mist generation predetermined water level 23 or less. Since the mist generation amount is inversely proportional to the water level, the mist generation predetermined water level 23 for obtaining the predetermined mist generation amount is less than the mist generation predetermined water level 23 by setting the water level of the cleaning water supplied in the pretreatment process to be equal to or less than the mist generation predetermined water level 23. The generation amount can be increased and the cleaning performance can be further improved.

In this cleaning process, water is supplied up to a predetermined amount of water level 24 higher than the water level in the pretreatment process, so that it is possible to prevent pump air galling and the like and to obtain a stable cleaning water discharge capability. It is possible to effectively wash 9 stains such as tableware that is lifted by mist.

  As described above, the dishwasher according to the present invention has a pretreatment process in which fine particle detergent mist is attached to an object to be washed and left to stand, so that the cleaning power can be greatly improved. By controlling the driving of the mist generating means according to the temperature detected by the temperature detecting means in the process, the cleaning performance can be further improved. In addition, the washing water supplied in the pretreatment process is less than the predetermined water level for mist generation, so that the amount of mist generated can be increased and the washing performance can be further improved. Useful as.

The longitudinal cross-sectional view of the dishwasher of Embodiment 1 of this invention Front view of the dishwasher Enlarged sectional view of the mist generating means of the dishwasher Vertical section of a conventional dishwasher

2 Washing tank 3 Water supply valve (water supply means)
5 Washing pump 6 Washing nozzle 9 Tableware 10 Heater (heating means)
14 Mist generating means 22 Temperature detecting means

Claims (5)

A cleaning tank for storing tableware, a water supply means for supplying cleaning water used in the cleaning process, a cleaning pump for pumping the cleaning water, a cleaning nozzle for injecting the cleaning water pumped from the cleaning pump to the tableware, A heating means for heating the washing water, a temperature detection means for detecting the room temperature of the washing tank and the temperature of the feed water, and a mist generating means for adhering the fine particle detergent liquid to tableware, etc. the washing water to drive the wash pump after pretreatment step and the pretreatment step of scattering the mist has a main cleaning step of jetting the like dishes, to drive the heating means and the mist generator by the pretreatment step, at the start of operation Of the heating means and the mist generating means in the pretreatment step based on the detected temperature T0 of the temperature detecting means and the detected temperature T1 of the temperature detecting means after a predetermined time has elapsed from the start of operation. Dishwasher to control the time. The mist generating means is composed of an ultrasonic oscillator provided in the lower part of the cleaning tank, and the level of the cleaning water supplied in the pretreatment process is the mist generation predetermined water level with respect to the mist generation predetermined water level for obtaining a predetermined amount of mist generation. The dishwasher according to claim 1, wherein: 3. The dishwasher according to claim 2, wherein the level of the cleaning water supplied in the pretreatment step is set to a predetermined level or lower for mist generation, and the water supply means is driven in the main cleaning step to set the level to a level higher than the predetermined level for generating mist. When the detected temperature T0 of the temperature detecting means at the time of operation start is lower than the predetermined temperature, dishwasher as claimed in any one of claims 1 to 3 long between when mist generator driven by the pre-processing step. 2. When the detected temperature T1 of the temperature detecting means after the elapse of a predetermined time from the start of operation is lower than the predetermined temperature, at least one of the mist generating means driving time and the heating means driving time in the pretreatment process is lengthened. dishwasher according to any one of 1-4.