JP3988697B2 - dishwasher - Google Patents

Description

  The present invention relates to a dishwasher for cleaning by irradiating washing water onto an object to be cleaned such as dishware.

  Conventionally, a general dishwasher has been configured as shown in FIG. Hereinafter, the configuration will be described.

  As shown in FIG. 2, the dishwasher 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. The washing pump 5 circulates washing water into the washing tank 2. is doing. Further, the drain hole 4 is provided with a residue filter 6 for collecting the residue.

  That is, the cleaning water supplied into the cleaning tank 2 passes through the residual filter 6 and is sucked into the cleaning pump 5 and supplied from the cleaning pump 5 to the cleaning nozzle 7 provided at the inner bottom of the cleaning tank 2. The washing water sprayed from the washing nozzle 7 circulates along a route that returns to the drain hole 4 again after washing the object (tableware) 8 to be washed. At this time, the residue or the like dropped off from the object to be cleaned 8 flows into the residue filter 6 together with the washing water, and the residue having a size that cannot pass through the residue filter 6 is collected by the residue filter 6.

  Further, a heater 9 for heating the cleaning water is provided between the cleaning nozzle 7 and the bottom of the cleaning tank 2, and an object to be cleaned 8 can be arranged orderly above the cleaning nozzle 7, so that the cleaning water is effective. The tableware basket 10 configured to be sprayed on the object to be cleaned 8 is installed for efficient cleaning. The drainage pump 11 discharges the washing water through the drainage hose 12 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, with these configurations, it was not possible to wash all the stains washed in 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, allows cleaning against dish stains that could not be removed conventionally, and attaches a high concentration detergent solution to the object to be cleaned. The purpose is to make the extension time as short as possible, while it becomes longer than the normal operation time by leaving it to stand.

To achieve the present invention the above object, the cleaning tank for accommodating the object to be cleaned dishes or the like and supplied to use water in the washing process by the water supply means is heated by the water heating means, detergents scattering The pretreatment is such that the high concentration detergent liquid is adhered to the object to be cleaned by the means , and the detergent liquid scattering means is applied to the object to be washed and scattered before the cleaning process. In this pretreatment process , water used in the subsequent cleaning process is supplied to the cleaning tank by the water supply means and heated by the heating means, and is scattered and cleaned in the heated water. The high concentration detergent solution that has fallen without adhering to the object is dissolved without adhering to the bottom of the washing tank and solidifying it to produce washing water to be used in the washing process, and the washing water is heated by heating means. It was heated to a suitable temperature in the cleaning process It is those you put so.

As a result, the cleaning performance can be greatly improved by having a pretreatment process in which a detergent solution having a higher concentration than the detergent concentration during normal use is left on the object to be cleaned . The water used in the cleaning process performed thereafter is supplied to the cleaning tank by the water supply means and heated by the heating means, and the water that has been scattered without being attached to the object to be cleaned is scattered in the heated water. A detergent solution with a concentration adheres to the bottom of the washing tank and dissolves without solidifying to produce washing water to be used in the washing process, and the washing water is heated by heating means to adjust the water temperature in the washing process. Since the temperature is raised to an appropriate temperature, the time required for the water temperature rise in the next main cleaning process can be shortened. Furthermore, the cleaning performance can be further improved by performing the main cleaning process from the high temperature cleaning water, so that the cleaning time can be shortened.

The dishwasher according to the present invention has a pretreatment process in which a detergent solution having a higher concentration than that in normal use is attached to an object to be washed and left to stand, so that the washing performance can be greatly improved. Oite the processing step, the water used in the washing step to be performed thereafter, heated at a heating section supplies the cleaning tank by the water supply means, to the heated water, without adhering scattered in the object to be cleaned The high-concentration detergent liquid that has fallen on the bottom of the washing tank is dissolved without sticking to the bottom of the washing tank to generate washing water to be used in the washing process, and the washing water is heated by heating means to increase the water temperature. Since the temperature is raised to an appropriate temperature in the cleaning process, the time required for the water temperature increase in the next main cleaning process can be shortened. Furthermore, the cleaning performance can be further improved by performing the main cleaning process from the high temperature cleaning water, so that the cleaning time can be shortened.

The first invention includes a cleaning tank for accommodating the object to be cleaned dishes such as a water supply means for supplying water to be used in the cleaning step in the cleaning tank, a heating means provided in said cleaning tank, the high concentration of A detergent solution scattering means for adhering the detergent liquid to the object to be cleaned, and before the cleaning process, before the detergent liquid scattering means scatters and attaches a high concentration detergent liquid to the object to be cleaned Water having a treatment step , and in the pretreatment step , water used in a subsequent washing step is supplied to the washing tank by the water supply means and heated by the heating means, and is scattered in the heated water. The cleaning liquid used in the cleaning step is generated by dissolving the high-concentration detergent liquid that has fallen without adhering to the object to be cleaned without adhering to the bottom of the cleaning tank and solidifying, and the wash the wash water by the heating means Is obtained by so keep heating to a suitable temperature in the stroke, by having a pre-processing step to leave from the detergent concentration in the normal use of high concentrations of detergent liquid to adhere to the object to be cleaned, the cleaning performance significantly Since the cleaning water supplied to the cleaning tank in the pretreatment process is heated by the heating means to increase the water temperature, the time required for the water temperature increase in the next main cleaning process is shortened. can do. Furthermore, the cleaning performance can be further improved by performing the main cleaning process from the high temperature cleaning water, so that the cleaning time can be shortened. In addition, the detergent liquid that has been scattered from the detergent splashing means and does not adhere to the object to be cleaned and has fallen to the bottom of the washing tank is dissolved in the stored washing water, so that it adheres to the bottom of the washing tank and hardens. Therefore, it can contribute to the cleaning from the beginning of the main cleaning process.

  In a second aspect of the first aspect of the present invention, the amount of water supplied to the cleaning tank is set so that the detergent concentration in the main cleaning step is obtained. It is possible to immediately shift to the main cleaning process from the state as it is. Therefore, water supply time can be shortened by supplying water in the middle of the pretreatment process. In addition, the detergent liquid that has been scattered from the detergent liquid splashing means and does not adhere to the object to be cleaned and has fallen to the bottom of the washing tank is dissolved in the stored washing water, so that it adheres to the bottom of the washing tank and hardens. Therefore, it can contribute to the cleaning from the beginning of the main cleaning process.

  In a third aspect of the present invention according to the first aspect of the present invention, the amount of water supplied to the cleaning tank is set such that the amount of water is higher than the concentration of detergent in the main cleaning step, and cleaning is performed with a plurality of detergent concentrations. In the operation of a dishwasher having a process, when the main cleaning process is continued, the state can be immediately shifted to the main cleaning process. Therefore, water supply time can be shortened by supplying water in the middle of the pretreatment process. In addition, the detergent liquid that has been scattered from the detergent liquid splashing means and does not adhere to the object to be cleaned and has fallen to the bottom of the washing tank is dissolved in the stored washing water, so that it adheres to the bottom of the washing tank and hardens. Therefore, it can contribute to the cleaning from the beginning of the main cleaning process.

  4th invention is equipped with the washing | cleaning pump which can change the capability to pressurize washing water in any one of said 1st-3rd invention, and when washing water is heated with a heating means at a pre-processing process, The cleaning pump is driven so that the cleaning water is not exposed to the water, and since the cleaning water does not reach the object to be cleaned with the high-concentration detergent liquid, it may affect the action of the high-concentration detergent liquid. In addition, when the cleaning water is heated, since the cleaning water flows around the heating means, heat transfer from the heating means to the cleaning water can be performed smoothly, and the thermal efficiency can be improved.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the heating means controls the heating temperature of the cleaning water in the pretreatment process, and the temperature of the cleaning water is raised too high. When using high-temperature washing water in the main washing process, depending on the soil, solidification may interfere with washing or become ineffective for enzyme activation. By controlling the temperature to a proper temperature, the operation of the main cleaning process can be performed efficiently.

  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 | symbol, 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. As shown in FIG. 1, the detergent liquid scattering means 13 scatters a high-concentration detergent liquid in which the detergent is dissolved in a small amount of water into the washing tank 2, and the scattered high-concentration detergent liquid is applied to the object 8 to be cleaned. It is what is attached. The cleaning pump 14 is rotationally driven by a driving unit that can vary the rotational speed. The temperature detecting means 15 detects the temperature of the cleaning water and is attached to the outside of the bottom of the cleaning tank 2.

  Here, there is a pretreatment process in which the detergent liquid scattering means 13 scatters the high concentration detergent liquid onto the article 8 to be cleaned, and in this pretreatment process, the detergent liquid scattering means 13 removes the high concentration detergent liquid. After scattering, water is supplied into the cleaning tank 2 and the supplied cleaning water is heated by a heater (heating means) 9. At this time, the amount of water supplied to the cleaning tank 2 is set so that the detergent concentration in the main cleaning process is obtained.

  Further, when the washing water is heated by the heater 9 in the pretreatment process, the washing pump 14 is driven so that the washing object 8 is not exposed to the washing water, and the washing water in the pretreatment process is further driven by the temperature detecting means 15. The heating temperature is controlled.

  The operation and action of the above configuration will be described. First, a standard amount of detergent is put into the detergent liquid scattering means 13, and a predetermined amount of water that becomes a high concentration detergent liquid is supplied from the water supply valve (water supply means) 3 by a supply hose (not shown) to the detergent liquid scattering means 13. Supply water. 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. The water supply means may use another dedicated water supply valve.

  Next, as a pretreatment step, a detergent solution with a high concentration is scattered from the detergent solution scattering means 13 into the cleaning tank 2. This high-concentration detergent liquid adheres to the article 8 to be cleaned and is left in that state, and the high-concentration detergent liquid chemically decomposes the dirt adhering to the article 8 to be cleaned.

  Further, in this pretreatment process, after the detergent liquid scattering means 13 scatters a high concentration detergent liquid, water supply is started from the water supply valve 3, and the water supply amount detection means 16 cleans only the amount of cleaning water used in the main cleaning process. Water is supplied into the tank 2. When the water supply is finished, the heater 9 is energized to heat the cleaning water.

  Here, the cleaning pump 14 driven by a driving means capable of changing the number of revolutions is operated by setting the pressurizing capacity for injecting the cleaning water from the cleaning nozzle 7 low. At this time, the spraying ability from the washing nozzle 7 is set to the ability that the washing object 8 is not subjected to washing water. Therefore, the washing water does not affect the object 8 to which the high-concentration detergent solution is attached, and thus does not affect the action of the high-concentration detergent solution. Further, since the washing water flows around the heater 9, heat exchange proceeds smoothly and is efficient.

  Moreover, the temperature detection means 15 always detects the temperature of the cleaning water, and controls the heating temperature so that the temperature of the cleaning water does not exceed a certain level.

  Here, in the next main cleaning process, it is necessary to raise the temperature of the cleaning water to about 50 to 60 ° C. in order to efficiently clean the dirt. However, the detergent enzyme is activated at an appropriate temperature, and if the temperature of the washing water is too high, it is disadvantageous for the washing performance. Furthermore, if high-temperature washing water is instantaneously applied to dirt, if the dirt is a protein, the protein changes, which is disadvantageous for the washing performance.

  Therefore, increasing the temperature of the cleaning water to an appropriate temperature in the pretreatment process before the cleaning process as in the present invention can shorten the time required for the temperature increase and reduce the time required for the cleaning process from the initial stage. Washing can be performed with washing water at an appropriate temperature at which the enzyme of the detergent is activated, and the washing performance can be improved.

As described above, in this embodiment, the liquid detergent scattering means 13 has a pretreatment step to leave a highly concentrated detergent solution scattered cleaning object 8, Oite this pretreatment step, then The water used in the cleaning process is supplied to the cleaning tank 2 by the water supply valve 3 and heated by the heater 9, and the water that has been scattered without being attached to the object 8 to be cleaned is scattered. A detergent solution having a concentration adheres to the bottom of the washing tank 2 and is melted without solidifying to generate washing water to be used in the washing process, and the washing water is heated by the heater 9 to adjust the water temperature in the washing process. since previously raised to a suitable temperature, pre-treatment step by washing performance can be significantly improved, one technique for it is possible to shorten the time required for temperature rise in the cleaning step. Furthermore, the cleaning performance can be further improved by performing the main cleaning process from cleaning water having a high temperature effective for activating the enzyme, so that the cleaning time can be shortened.

  Further, since the amount of water supplied to the cleaning tank 2 is set so as to obtain the detergent concentration in the main cleaning process, when the main cleaning process is continued, the state is immediately shifted to the main cleaning process. The water supply time can be shortened by supplying water during the pretreatment process. Further, since the detergent liquid that has been scattered from the detergent liquid scattering means 13 and does not adhere to the object 8 to be cleaned and has fallen to the bottom of the cleaning tank 2 is dissolved in the stored cleaning water, it adheres to the bottom of the cleaning tank 2. It can contribute to the cleaning from the beginning of the main cleaning process without being hardened.

  In addition, when the cleaning water is heated by the heater 9 in the pretreatment process, the cleaning pump 14 is driven so that the cleaning water is not applied to the object 8 to be cleaned. Since the cleaning object 8 is not applied, it does not affect the action of the high-concentration detergent solution, and when the cleaning water is heated, the cleaning water flows around the heater 9, so that the heater 9 moves to the cleaning water. The heat transfer can be performed smoothly, and the thermal efficiency can be improved.

  Further, since the heating temperature of the cleaning water in the pretreatment process is controlled, the cleaning operation can be efficiently performed by controlling the heating temperature of the cleaning water to an appropriate temperature.

(Embodiment 2)
As shown in FIG. 1, the water supply amount detection means 17 is configured to detect a plurality of water amounts, and after the high concentration detergent liquid is scattered from the detergent liquid scattering means 13 in the pretreatment process, the washing tank 2 Set the amount of water that is higher than the detergent concentration (standard detergent concentration) in the main cleaning process and detect the cleaning water to be supplied inside, and then set the amount of water to obtain cleaning water with the normal detergent concentration in the subsequent cleaning process. It is configured to do. The configuration is the same as that of the above-described first embodiment.

  The operation and action of the above configuration will be described. Since the pretreatment process is the same as the operation and action of the first embodiment except that the cleaning water supplied into the cleaning tank 2 is supplied by a smaller amount than the cleaning water used in the main cleaning process. Description is omitted.

  In the pretreatment process, after the detergent liquid scattering means 13 scatters a high-concentration detergent liquid, the cleaning water used in the main cleaning process is started by the water supply amount detection means 17 that can start water supply from the water supply valve 3 and detect a plurality of water amounts. Supply less water than water.

  Next, in the main cleaning process, at first, cleaning is started with this high-concentration cleaning water having a small amount of water. Naturally, unlike the concentration of the high-concentration detergent liquid that is scattered from the detergent liquid scattering means 13 in the pretreatment process, the concentration is set to a predetermined standard detergent concentration. Even in the case of washing water having a small amount of water and a concentration higher than the standard detergent concentration, the washing pump 14 can change the pressurizing capacity for injecting the washing water from the washing nozzle 7, and even at this small amount of water, the number of rotations can be reduced to perform washing. The pump 14 is operated in a state where the pressurizing capacity of the spray water from the cleaning nozzle 7 is lowered to such an extent that the capacity of the pump 14 does not become airy.

  Washing the article to be cleaned 8 at a high concentration such that the washing water is applied is more advantageous for washing by chemical power such as enzymes than washing water having a standard detergent concentration.

  Washing is performed by jetting with this high-concentration wash water, and after a certain period of time has elapsed, the water amount is supplied from the water supply valve 3 until the water amount reaches the amount of water having the standard concentration as detected by the water supply amount detection means 17. Continue washing with this standard concentration of wash water. At this time, the cleaning pump 14 causes the pressurizing ability to inject cleaning water from the cleaning nozzle 7 to be maximized. This is because some stains require mechanical force with washing water.

  As described above, in the present embodiment, since the amount of cleaning water supplied into the cleaning tank 2 is set to be higher than the detergent concentration in the main cleaning step, the cleaning step is performed with a plurality of detergent concentrations. In the operation of the dishwasher, when the main cleaning process is continued, it is possible to immediately shift from the state as it is to the main cleaning process. Therefore, water supply time can be shortened by supplying water in the middle of the pretreatment process. Further, in this operation method, cleaning is performed with three levels of detergent concentration, and effective cleaning against various types of dirt can be performed.

As described above, the dishwasher according to the present invention has a pretreatment process in which a detergent solution having a higher concentration than that of a normal use is attached to an object to be washed and left to stand, thereby greatly improving the cleaning power. it can, Oite this pretreatment step, after which the water used in the washing step to be performed, the heating by the heating means supplies to the cleaning tank by the water supply means, is the heated water, the scattered A high concentration detergent solution that has fallen without adhering to the object to be washed is dissolved without adhering to the bottom of the washing tank and solidifying it, generating washing water for use in the washing process, and heating the washing water as a heating means. The water temperature is raised to an appropriate temperature in the washing process by heating with the above, so that the time required for the water temperature rise in the next main washing process can be shortened, and further, the main washing process is performed from the hot washing water. And further cleaning Can improve the ability, it is possible to shorten the cleaning time, it is useful as dishwasher for washing by spraying washing water to the object to be cleaned such as tableware.

The longitudinal cross-sectional view of the dishwasher in Embodiment 1 and 2 of this invention Vertical section of a conventional dishwasher

Explanation of symbols

2 Washing tank 3 Water supply valve (water supply means)
8 Object to be cleaned 9 Heater (heating means)
13 Detergent spraying means

Claims (5)

A cleaning tank for accommodating the object to be cleaned dishes such as a water supply means for supplying water to be used in the cleaning step in the cleaning tank, a heating means provided in said cleaning tank, the high concentration of detergent liquid to be cleaned And having a pretreatment process in which a detergent solution is scattered and attached to an object to be cleaned by the detergent liquid scattering means , which is performed before the cleaning process . In the pretreatment process , water used in a subsequent cleaning process is supplied to the cleaning tank by the water supply means and heated by the heating means, and is scattered into the heated water to be cleaned. leave generate wash water used in the washing step was dropped without adhering the high-concentration detergent solution by dissolve without solidify adhering to the bottom of the cleaning tank, and the heat the wash water suitable temperature for the cleaning step by means In dishwasher that ensure that you have heating. 2. The dishwasher according to claim 1, wherein the amount of water supplied to the washing tank is set so as to obtain a detergent concentration in the main washing step. The dishwasher according to claim 1, wherein the amount of water supplied to the cleaning tank is set to be higher than the detergent concentration in the main cleaning step. A cleaning pump having a variable ability to pressurize the cleaning water is provided, and when the cleaning water is heated by the heating means in the pretreatment process, the cleaning pump is driven so that the cleaning water is not applied to the object to be cleaned. 4. The dishwasher according to any one of 3 above. The dishwasher according to any one of claims 1 to 4, wherein the heating means controls the heating temperature of the washing water in the pretreatment process.

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