JP2009066103A - Detergent supply device for dishwasher and its detergent supply method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detergent supply device for a dishwasher for stably maintaining the detergent concentration of washing water in the dishwasher to be diluted by the inflow of rinsing water at an appropriate concentration without utilizing a concentration sensor, and its detergent supply method. <P>SOLUTION: In the detergent supply device and the detergent supply method for controlling a detergent supply amount to the washing water in the dishwasher by the opening time of an opening/closing valve, control is carried out so as to open the opening/closing valve by sensing the operation of a rinsing pump for supplying the fixed amount of rinsing water to the washing water tank of the dishwasher and to close the opening/closing valve by the lapse of the time required for supplying the detergent for an amount for maintaining the detergent concentration of the fixed amount of the supplied rinsing water at the appropriate concentration. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a detergent supply apparatus for a dishwasher and a method for supplying the detergent, and more particularly, a dishwasher that stably maintains an appropriate detergent concentration of dishwasher washing water without using a concentration sensor. The present invention relates to a detergent supply device and a detergent supply method therefor.

  Dishwashers are widely spread and spread mainly for commercial use. Among them, rinse water and detergent are supplied to and stored in the wash water tank to produce wash water, and this wash water is recycled and used for dishes, etc. The most commonly used apparatus is to wash an object to be cleaned and rinse the object to be cleaned using only rinse water.

  What is shown in FIG. 4 is an example of this type of conventional dishwasher. The main body of the dishwasher 4 is divided into upper and lower parts. The cleaning chamber 5 for performing the rinsing is arranged, and a cleaning water tank 6 for storing cleaning water in the lower part and devices such as the rinsing pump 7 and the cleaning pump 8 are arranged.

  Above and below the space of the cleaning chamber 5, a cleaning nozzle 51 for cleaning the object to be cleaned by spraying cleaning water and a pair of rinsing nozzles 52 for rinsing by spraying rinsing water are provided. For the nozzle 51, rinse water 61 supplied with rinsing water and an appropriate amount of detergent to the washing water tank 6 is pressurized and supplied by the washing pump 8, and the washing water 61 after washing is supplied to the washing water tank 6. It is used by circulating down.

  Further, the rinse water 91 stored and heated in the rinse water tank 9 is pressurized and supplied to the rinse nozzle 52 by the rinse pump 7, and the rinse water 91 sprayed from the rinse nozzle 52 is also supplied to the washing water tank 6. It flows down and is circulated as wash water 61.

  The conventional main dishwasher adopts such a configuration, and while the washing water 61 stored in the washing water tank 6 is circulated and used for repeated washing, a new rinse is supplied for rinsing. Since the water 91 flows into the cleaning water 61 and dilutes the detergent concentration of the cleaning water 61, it is necessary to maintain the detergent concentration of the cleaning water 61 at an appropriate concentration corresponding to the amount of the rinse water 91 that has flowed in. The correct amount of detergent must be supplied.

  For this reason, the tableware which supplies the appropriate quantity of detergent corresponding to the supply quantity of the rinse water 91 which dilutes the detergent density | concentration of the washing water 61 by being newly supplied, and maintains the detergent density | concentration of the washing water 61 in a proper density | concentration. Detergent feeders and detergent feeders for washing machines have already been provided and used.

  The detergent supply device shown in FIG. 3 is an example of the most commonly provided and used. The detergent concentration of the washing water 61 is detected by the concentration sensor S, and the washing water tank 6 of the dishwasher 4 is detected by this detection signal. The amount of detergent supplied to the water is controlled to maintain the detergent concentration of the cleaning water 61 at an appropriate concentration.

  This type of conventional detergent supply device includes a detergent supply 1 that sprays or sprays water from a nozzle 12 onto the bottom of a solid detergent 3 supported by a net 11 and supplies the detergent solution to a dishwasher as a detergent solution. A supply pipe 14 and a water supply pipe 13 for supplying water for dissolving the solid detergent 3 to the detergent supplier 1 are provided. An electromagnetic valve 21 is provided in the water supply pipe 13 and the opening and closing of the electromagnetic valve 21 is controlled. A control circuit 22 is provided, and a concentration sensor S is attached via a cable 25. The electromagnetic valve 21 and the control circuit 22 are accommodated in the operation panel 2. The cable of the concentration sensor S is also provided inside the operation panel 2. Connected.

  In carrying out the above detergent supply apparatus, as shown in FIG. 4, the open end of the detergent supply pipe 14 of the detergent supply 1 is connected to the detergent supply port 62 provided in the washing water tank 6 of the dishwasher 4. At the same time, when the concentration sensor 4 is installed at an appropriate position of the cleaning water tank 6 and the detergent concentration of the cleaning water 61 is reduced to a preset limit concentration, the control circuit 22 is based on the detection signal of the concentration sensor S. Opens the electromagnetic valve 21 and supplies detergent to the washing water tank 6 from the detergent supplier 1, and when the detergent concentration of the washing water 61 reaches a preset appropriate concentration, it is controlled by the detection signal of the concentration sensor S. The circuit 22 closes the electromagnetic valve 21 and stops the supply of detergent from the detergent supplier 1.

JP 2004-167165 A

  As described above, a conventional detergent supply device for a dishwasher detects the detergent concentration of washing water in the dishwasher with a concentration sensor, and determines the detergent supply amount according to the detergent concentration detected by the concentration sensor. Although it is intended to control and maintain the detergent concentration of cleaning water at an appropriate concentration, it has a major problem in the following points, and the detergent concentration of cleaning water cannot be stably maintained.

  That is, in the above-described conventional detergent supply device, the detergent supply device 1 is interposed in the water supply pipe 13 for supplying water for dissolving the solid detergent to the detergent supply 1 based on the detection signal of the concentration sensor S that detects the concentration of the detergent in the cleaning water 61. The electromagnetic valve 21 is opened and closed to control the amount of detergent supplied from the detergent supplier 1 to the dishwasher 4.

  However, even if the detergent concentration of the washing water 61 is reduced to the limit concentration and the electromagnetic valve 21 is opened by the detection signal of the concentration sensor S, there is no detergent solution to be supplied to the inside of the detergent supply 1. A time lag until the solution is dissolved and supplied to the washing water tank 6 as a detergent solution must be generated, and the detergent concentration of the washing water 61 falls below the limit concentration.

  Similarly, even when the detergent concentration of the cleaning water 61 reaches an appropriate concentration and the electromagnetic valve 21 is closed by the detection signal of the concentration sensor S, there is already a detergent solution in which the solid detergent 3 is dissolved in the detergent supply device 1. Then, a further waste detergent is supplied to the cleaning water 61 that has reached an appropriate concentration.

  As described above, in the conventional detergent supply device using the concentration sensor, the detergent concentration of the washing water greatly changes and exhibits unevenness, and the appropriate detergent concentration of the washing water cannot be stably maintained.

  Moreover, in the conventional detergent supply device using the concentration sensor, the cleaning is started after supplying a predetermined amount of rinse water 91 to the cleaning water tank 6 of the dishwasher 4, and the concentration sensor is started together with the start of the cleaning. Since the detergent concentration of the washing water 61 is detected by S and the detergent is supplied, the washing is started with the washing water not containing the detergent, and the detergent concentration is not more than the limit concentration until the detergent concentration is reached. In other words, it must be said that it is extremely unstable in terms of maintaining the detergent concentration of washing water at an appropriate concentration.

  In addition, the concentration sensor detects the detergent concentration by changing the conductivity of the wash water, but the conductivity of the wash water also changes depending on conditions other than the detergent concentration.For example, the salt concentration of the wash water increases with washing. The concentration sensor lacks basic reliability as a means of stably maintaining the detergent concentration of washing water, such as difficult to accurately detect the detergent concentration.

  In addition, the conventional detergent supply device that uses a concentration sensor complicates the control unit and prevents downsizing of the operation panel, greatly restricting the installation conditions, and maintenance / inspection of the concentration sensor and control unit -The high cost of replacement has also been pointed out as a problem for a long time.

  As described above, since there are many problems associated with the conventional detergent supply device using the concentration sensor, a detergent supply device and a detergent supply method that do not use the concentration sensor have been proposed. In addition, the control and driving of the detergent supply device is largely dependent on the control unit and main parts of the dishwasher.

  However, this type of detergent supply device is desired to be able to be carried out beyond the detailed specifications of the dishwasher, and depends largely on the control unit and main parts of the specific dishwasher. In this case, the market will be lacking and the road of implementation will be closed.

  The detergent supply device and the detergent supply method that do not use the concentration sensor, such as those described in Patent Document 1, are not accepted by the market regardless of their technical superiority or inferiority. However, it is thought that this is the reason why it is still used as the most common detergent supply apparatus even though it has many problems.

  The present invention eliminates and eliminates problems inevitably held by conventional examples, and is intended for a dishwasher that stably maintains the detergent concentration of dishwasher washing water at an appropriate concentration without using a concentration sensor. It is an object of the present invention to provide a detergent supply device and a detergent supply method.

The invention of claim 1 is configured so as to circulate and use the wash water obtained by supplying the rinse water and the detergent to the wash water tank, and to wash the dishes with only the rinse water. A dishwasher configured to supply an amount of detergent that maintains the correct detergent concentration for the wash water diluted by the new rinse water supply to a dishwasher with a fixed supply rate A detergent supply device for a detergent, in which water is sprayed or sprayed on the contained solid detergent to obtain a detergent solution, and the detergent solution is supplied from the detergent supplier to the washing water tank of the dishwasher A detergent supply device for a dishwasher comprising a pipe, a water supply pipe for supplying water for dissolving the solid detergent to the detergent supply, and an open / close valve interposed in the water supply pipe, the detergent supply device for the dishwasher Rinse water The time required to supply the detergent solution in an amount that makes the detergent concentration of the washing water diluted to the proper concentration by sensing the supply of the water and opening the on-off valve and diluting the supply of the new rinse water. It is the detergent supply apparatus for dishwashers characterized by including the control means which closes the said on-off valve with progress of this.

According to a second aspect of the present invention, the open / close valve is an electromagnetic valve, and the control means supplies a power cable of the electromagnetic valve to be connected to a power supply unit of a rinse pump provided in the dishwasher, and supplies the rinse water. A control circuit configured to detect the energization opening of the electromagnetic valve due to the operation of the rinsing pump and to close the electromagnetic valve with a lapse of time necessary for supplying the detergent solution. The detergent supply device for a dishwasher according to claim 1.

The invention of claim 3 is configured to wash the dishes and the like by circulating and using the wash water obtained by supplying the rinse water and the detergent to the wash water tank, and to rinse only with the rinse water. A dishwasher configured to supply an amount of detergent that maintains the correct detergent concentration for the wash water diluted by the new rinse water supply to a dishwasher with a fixed supply rate A detergent supply device for a detergent, in which water is sprayed or sprayed on the contained solid detergent to obtain a detergent solution, and the detergent solution is supplied from the detergent supplier to the washing water tank of the dishwasher In a detergent supply method using a detergent supply device for a dishwasher comprising a pipe, a water supply pipe for supplying water for dissolving a solid detergent to the detergent supply device, and an open / close valve interposed in the water supply pipe, Dishwasher Detecting a new supply of the rinse water and opening the open / close valve, and supplying the detergent solution in an amount that makes the detergent concentration of the wash water diluted by the new rinse water supply an appropriate concentration. In another aspect of the present invention, there is provided a detergent supply method, characterized in that the on-off valve is closed after a lapse of time required.

The invention of claim 4 uses an electromagnetic valve as the opening and closing valve, connects a power cable of the electromagnetic valve to a power supply unit of a rinse pump provided in the dishwasher, and supplies the rinse water of the rinse pump. 4. The detergent supply method according to claim 3, wherein the electromagnetic valve is energized and opened by operation, and the electromagnetic valve is closed with a lapse of time necessary for supplying the detergent solution.

  As described above, the detergent supply apparatus and the detergent supply method for a dishwasher according to the present invention senses the supply of rinse water in the dishwasher and determines the detergent concentration of the wash water diluted by the supply of rinse water. It is configured to supply the necessary amount of detergent to achieve the proper concentration. Therefore, according to the present invention, there is provided a detergent supply device and a detergent supply method for a dishwasher that stably maintains the detergent concentration of the washing water of the dishwasher at an appropriate concentration without using a concentration sensor. Can do.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 shows an example of a detergent supply device for a dishwasher according to the present invention. As in the prior art, water is sprayed or sprayed from a nozzle 12 onto the bottom of a solid detergent 3 supported by a net 11. The water supply pipe 1 has a detergent supply device 1 to be supplied as a solution, a detergent supply pipe 14 for sending the detergent solution to the dishwasher, and a water supply pipe 13 for supplying water for dissolving the solid detergent 3 to the detergent supply device 1. 13 is provided with an electromagnetic valve 21 and a control circuit 22 for controlling the opening and closing of the electromagnetic valve 21 is provided. The electromagnetic valve 21 and the control circuit 22 are accommodated in the operation panel 2, but a concentration sensor is provided. There is no place to use.

  In the implementation, as shown in FIG. 2, the open end of the supply pipe 14 of the detergent feeder 1 is connected to the detergent supply port 62 provided in the washing water tank 6 of the dishwasher 4, and the electromagnetic valve 21 is connected. It is sufficient to connect the power cable 23 to the power source of the rinse pump 7 provided in the dishwasher 4.

  Here, in the dishwasher 4, the rinse pump 7 pressurizes and supplies the rinse water 91 from the rinse water tank 9 to the pair of upper and lower rinse nozzles 52, and is jetted from the rinse nozzle 52 and flows down to the rinse water tank 6. The amount of rinsing water 91 to be quantified for one operation of the rinsing pump 7 (that is, one supply of rinsing water 91) is necessary to make this quantified rinsing water 91 an appropriate detergent concentration. Naturally, the amount of detergent can be calculated.

  In addition, in order to obtain a detergent solution that responds to this necessary amount of detergent, the electromagnetic valve 21 of the water supply pipe 13 is opened, and the time for supplying water for dissolving the solid detergent to the detergent supply 1 can be calculated in the same manner. The control circuit 22 is set so that the energized and released electromagnetic valve 21 is closed over the calculated time.

  As a result, when the rinsing pump 7 is operated in the dishwasher 4 and the fixed amount of rinsing water 91 is supplied to the rinsing nozzle 52, the electromagnetic valve 21 connected to the power supply unit of the rinsing pump 7 and the power cable 23 is energized and opened. Since the control circuit 22 that senses the opening of the electromagnetic valve 21 closes the electromagnetic valve 21 with the passage of a set time, a fixed amount of rinsing water 91 is added to the washing water tank 6 of the dishwasher 4 after flowing down. A detergent solution having an appropriate detergent concentration is supplied from the detergent supply device 1, and the detergent concentration of the washing water 61 in the washing tank 6 to be diluted by the inflow of the rinse water 91 is maintained at an appropriate concentration. Is done.

  Here, in the detergent supply device according to the present embodiment, when the rinse pump 7 of the dishwasher 4 is activated and the supply of the rinse water 91 is started, the electromagnetic valve 21 is immediately opened and the supply of the detergent solution is also started. The

Therefore, when compared with the conventional example in which the detergent supply is started after waiting for the detergent concentration of the washing water to fall to the limit concentration due to the inflow of the rinse water, the detergent of the washing water 61 is used in all the washing steps in which the dishwasher 4 is operated. The concentration does not change greatly, and the detergent concentration is stably maintained at an appropriate concentration or its nearest concentration.

  In addition, each time the rinse pump 7 is actuated in the dishwasher 4 and a fixed amount of rinse water 91 is newly supplied, a detergent solution of a detergent amount with the fixed concentration of the rinse water 91 as an appropriate detergent concentration is supplied. For example, prior to cleaning, even when the rinsing pump 7 is operated a plurality of times to supply and store the rinsing water 91 in the cleaning water tank 6, the supplied and stored rinsing water 91 (quantity × number of times of supply) is appropriate. A detergent solution having a detergent amount of a sufficient detergent concentration is supplied in parallel with the supply of the rinse water 91.

Therefore, unlike conventional detergent supply equipment that must supply detergent after the start of cleaning, cleaning is performed with cleaning water that does not contain detergent at the start of cleaning, or the concentration is below the critical concentration until an appropriate detergent concentration is reached. It is impossible to carry out washing with washing water having a low detergent concentration.

  As described above, the detergent supply device and the detergent supply method for a dishwasher according to the present invention senses the supply of rinse water every time rinse water is supplied in the dishwasher, and appropriately supplies the supplied rinse water. By supplying the necessary amount of detergent to achieve the detergent concentration, it is possible to constantly and stably maintain the washing water of the dishwasher at an appropriate detergent concentration. The following problems that the detergent supply device and the detergent supply method inevitably have are also solved.

  That is, in the conventional detergent supply device and detergent supply method using the concentration sensor, maintenance and inspection / replacement of the concentration sensor and the control unit are accompanied by a considerable burden and cost, but in the present invention, the detergent supply device is configured. Since it is sufficient to connect the power cable of the electromagnetic valve to the power source of the rinse pump provided in the dishwasher, the burden and cost of maintenance, inspection, and replacement can be greatly reduced.

  In addition, the conventional detergent supply device controls the detergent supply by detecting the concentration of the washing water with a concentration sensor, which complicates the configuration of the control unit and increases its size, which hinders the downsizing of the operation panel. As a result, although the installation conditions of the detergent supply device were limited, the detergent supply device according to the present invention has a simple control unit configuration, and thus it is possible to reduce the size of the operation panel, which has been difficult in the past. This makes it easy to implement and increases marketability.

  Furthermore, since the detergent supply device and the detergent supply method according to the present invention are stable without causing large changes or unevenness in the detergent supply amount compared to those using a concentration sensor, the detergent consumption amount, that is, Also, the cost of detergent used can be suppressed.

  It should be noted that the conventional detergent supply device and detergent supply method using a concentration sensor are less dependent on the control part and main parts of the dishwasher, and can be implemented without being obstructed by small differences in the specification of the dishwasher. However, the detergent supply device and the detergent supply method according to the present invention are less dependent on the dishwasher than the conventional example, and the setting change / parts of the dishwasher An excellent effect can also be achieved in that it can be implemented in a wider variety of dishwashers without replacement and specification modification.

It is a partially cutaway front view which shows an example of the detergent supply apparatus for tableware washing machines which concerns on this invention. It is a front view which shows typically the condition of implementation of the detergent supply apparatus for tableware washing machines which concerns on this invention. It is a partially cutaway front view which shows the detergent supply apparatus for the conventional tableware washing machines. It is a front view which shows typically the implementation condition of the detergent supply apparatus for the conventional dishwasher.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Detergent feeder 2 Operation panel 3 Solid detergent 4 Dishwasher 5 Washing room 6 Washing water tank 7 Rinse pump 8 Washing pump 9 Rinse water tank 11 Net 12 Nozzle 13 Water supply pipe 14 Detergent supply pipe 21 Electromagnetic valve 23 Power cable 51 Washing Nozzle 52 Rinsing nozzle 61 Washing water 62 Detergent supply port 91 Rinsing water
S concentration sensor

Claims (4)

The washing water obtained by supplying rinsing water and detergent to the washing water tank is circulated and used to wash dishes, etc., and rinse with only rinsing water. A detergent supply device for a dishwasher configured to supply an amount of detergent for a dishwasher to maintain the detergent concentration of the wash water diluted by the new rinse water supply at an appropriate level. A detergent supply device for spraying or spraying water on the contained solid detergent to obtain a detergent solution, a supply pipe for supplying the detergent solution from the detergent supply device to the washing water tank of the dishwasher, and the detergent supply device In a detergent supply device for a dishwasher comprising a water supply pipe for supplying water for dissolving a solid detergent to the water supply and an opening / closing valve provided in the water supply pipe, a new supply of the rinse water in the dishwasher Perceive The opening / closing valve is opened, and the opening / closing valve is opened after a lapse of time necessary for supplying the detergent solution in an amount that makes the detergent concentration diluted with the supply of the new rinse water an appropriate concentration. A detergent supply device for a dishwasher comprising a control means for closing. The open / close valve is an electromagnetic valve, and the control means is based on the operation of the power supply cable of the electromagnetic valve to be connected to the power supply unit of the rinse pump provided in the dishwasher and the rinse pump that supplies the rinse water. 2. The control circuit according to claim 1, further comprising: a control circuit configured to detect the energization opening of the electromagnetic valve and to close the electromagnetic valve with a lapse of time necessary for supplying the detergent solution. Detergent supply device for dishwashers. The washing water obtained by supplying rinsing water and detergent to the washing water tank is circulated and used to wash dishes, etc., and rinse with only rinsing water. A detergent supply device for a dishwasher configured to supply an amount of detergent for a dishwasher to maintain the detergent concentration of the wash water diluted by the new rinse water supply at an appropriate level. A detergent supply device for spraying or spraying water on the contained solid detergent to obtain a detergent solution, a supply pipe for supplying the detergent solution from the detergent supply device to the washing water tank of the dishwasher, and the detergent supply device In a detergent supply method using a detergent supply device for a dishwasher comprising a water supply pipe for supplying water for dissolving a solid detergent to the water supply and an opening / closing valve provided in the water supply pipe, the rinse water in the dishwasher The time required to supply the detergent solution in an amount that makes the detergent concentration of the washing water diluted to the proper concentration by sensing the new supply and opening the open / close valve and diluting by the new rinse water supply. The detergent supply method, characterized in that the open / close valve is closed as time elapses. An electromagnetic valve is used as the opening / closing valve, and a power cable of the electromagnetic valve is connected to a power supply unit of a rinsing pump provided in the dishwasher, and the electromagnetic valve is energized by operating the rinsing pump for supplying the rinsing water. 4. The detergent supply method according to claim 3, wherein the electromagnetic valve is closed with a lapse of time necessary for supplying the detergent solution while being opened.