JP2014110886A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a dishwasher capable of obtaining high detergency by more quickly dissolving a detergent even if the temperature of washing water in a washing tank is low.SOLUTION: A dishwasher includes: a washing tank 3 storing a material to be washed 7 and having a water storing part 4 at an inner bottom part; a washing nozzle 6 provided in the washing tank 3 for injecting washing water to the material 7 to be washed; a heater 8 provided at a bottom in the washing tank 3 for heating the washing water; a washing pump 5 for supplying the washing water to the washing nozzle 6 and circulating the washing water in the washing tank 3; and a detergent feeding part 14 provided in the washing tank 3 for guiding the detergent to a fixed position of the inner bottom part of the washing tank 3. The detergent fed by a user before the start of washing operation is guided every time through the detergent feeding part 14 to a predetermined position near the heater 8. Thus, a dissolution rate of the detergent is improved to easily obtained high-concentration washing water, so that higher detergency can be obtained at the start of washing operation more than before without any increase in quantity of the detergent.

Description

  The present invention relates to a dishwasher for washing dishes and the like. More specifically, the present invention relates to a technique for putting a detergent in the vicinity of a heater when the detergent is put into a dishwasher.

  A conventional dishwasher includes an input device that sets an operation course and the like, and a control device that sequentially controls processes such as washing, rinsing, and drying based on the setting of the input device, and the control device includes a washing pump, Various electric parts such as a heater, a water supply valve, and a blower fan are controlled to perform the cleaning, rinsing, and drying processes. Prior to the execution of the washing process, the detergent is introduced from the detergent introduction unit. In the conventional dishwasher, the position of the bottom of the washing tank into which the detergent is introduced is set at a position away from the heater. In addition, when the water is supplied to a predetermined water level, the cleaning process is started by starting the cleaning pump almost simultaneously with energization of the heater (see, for example, Patent Document 1).

  The configuration of a conventional dishwasher will be described below. FIG. 8 is a side sectional view of a conventional built-in dishwasher. As shown in FIG. 8, the user holds the handle portion 18, pulls out the cleaning tank 3 from the main body 1, and accommodates an object 7 to be cleaned such as tableware in the cleaning tank 3 from the opening 2 that appears. In addition, the user puts the rated amount of detergent into the detergent throwing portion 14 disposed in the vicinity of the front surface in the cleaning tank 3. Thereby, the introduced detergent is guided to a predetermined position at the bottom of the cleaning tank 3 every time.

  When the user pushes the washing tub 3 into the original position and starts operation after the opening 2 is closed by the lid 11, the dishwasher operates the washing pump 5 driven by the motor and pressurizes by the washing pump 5. The cleaned water is sprayed from the cleaning nozzle 6 to perform the cleaning and rinsing process of the object 7 to be cleaned.

  Washing water for washing the object 7 to be washed used in the washing and rinsing process is supplied by a water supply valve 15 attached to the rear part of the main body 1 and stored in a water reservoir 4 at the bottom of the washing tank 3.

  The auxiliary water tank 16 guides the cleaning water stored in the water reservoir 4 at the bottom of the cleaning tank 3 to the water level detection device 20 including the cleaning water level detection device 20a and the overflow water level detection device 20b through the leftover vegetable recovery unit 10. ing. The cleaning water level detection device 20 a detects that a reference amount of water has been accumulated in the cleaning tank 3. The overflow water level detection device 20b detects that the water level in the cleaning tank 3 is higher than a predetermined water level and there is a possibility of overflow. The leftover collection part 10 is provided as a depression at the lowest position in the water reservoir 4 on the downstream side in the flow of the washing water in the bottom of the washing tank 3, and an arbitrarily removable leftover collection filter (not shown). And a rough drainage filter (not shown).

  A control device 21 is provided in the main body 1. The control device 21 controls various electrical components such as the cleaning pump 5, the heater 8, the water supply valve 15, and the blower fan 17, and executes cleaning, rinsing, and drying processes.

When the user sets an operation course with the input device 19, the control device 21 starts operation of the dishwasher based on the setting of the input device 19. When the standard course is set by the input device 19, the water supply to the cleaning tank 3 is accurately performed based on the detection information of the cleaning water level detection device 20a up to a certain amount of water (water level) (reference water level). Then, the cleaning pump 5 is operated for a while, and then the supply water 15 is energized for a predetermined time to add supplementary water to be added, so that the amount of cleaning water in the cleaning tank 3 is adjusted to a necessary and sufficient amount for cleaning. .

  When the water supply is completed, the heater 8 is energized and at the same time the cleaning pump 5 is operated, and the cleaning water is sprayed from the cleaning nozzle 6 while efficiently dissolving the detergent previously introduced into a predetermined position in the bottom of the cleaning tank 3. The object 7 to be cleaned is cleaned.

JP 2006-61450 A

  The dissolution rate of the introduced detergent is promoted by the flow of the cleaning water circulating in the cleaning tank 3 as the temperature of the cleaning water rises. In the above conventional configuration, the position of the bottom of the cleaning tank 3 into which the detergent is introduced is set at a position away from the heater 8, and cleaning is performed almost simultaneously with energization of the heater 8 at the start of the cleaning process. The pump 5 is activated. Therefore, the detergent concentration in the initial stage of operation when the feed water temperature is low is lower than that when the detergent is completely dissolved. Since the detergent component concentration has become extremely dilute due to reaction with water and contaminating components and has lost its effect, the maximum cleaning effect cannot be obtained.

  The present invention solves the above-described conventional problems, and concentrates the detergent to be introduced in the vicinity of the heater and further increases the detergent dissolution rate, thereby further increasing the cleaning power at the start of the cleaning operation. The dishwasher which can do is provided.

  In order to solve the above-described conventional problems, the present invention provides a cleaning tank having a water reservoir for storing an object to be cleaned and storing cleaning water in an inner bottom, and the cleaning water provided in the cleaning tank to the object to be cleaned. A cleaning nozzle for spraying, a cleaning pump for supplying cleaning water to the cleaning nozzle and circulating the cleaning water in the cleaning tank, a heater provided in the water reservoir for heating the cleaning water, and a bottom of the cleaning tank As a downstream side in the flow of washing water, a leftover collection part provided in the lowest position in the water reservoir, and a detergent provided in the washing tank and guiding the introduced detergent to a fixed position in the bottom of the washing tank Various electrical components such as a charging unit, a water level detection device that is provided in communication with the cleaning tank and detects the cleaning water level, a water supply valve that supplies water into the cleaning tank, the heater, the cleaning pump, and the water supply valve Controlling each of washing, rinsing and drying A control device that performs the process, and before the control device opens the water supply valve and starts water supply, the user introduces the detergent into the detergent introduction section, so that the detergent is introduced to the vicinity of the heater. A dishwasher configured to be arranged.

  As a result, the dissolution rate of the detergent increases as the heat in the vicinity of the heater and the water temperature rise, and as a result, high-concentration and high-temperature washing water can be easily obtained. Makes it possible to realize a dishwasher having a high cleaning power.

  According to the dishwasher of the present invention, high-concentration and high-temperature washing water can be easily obtained in a relatively short time, and the improvement in washing power at an earlier stage of washing operation makes it possible to increase the amount of detergent without increasing the amount of detergent. A dishwasher having higher cleaning power can be provided.

Side surface sectional drawing of the dishwasher in Embodiment 1 of this invention The top view which shows the structure of the washing tank inner bottom part of the dishwasher in Embodiment 1 of this invention. Side surface sectional drawing of the dishwasher in Embodiment 2 of this invention Side surface sectional drawing of the dishwasher in Embodiment 3 of this invention Front sectional drawing of the dishwasher in Embodiment 3 of this invention Front sectional view of a main part of a dishwasher in Embodiment 3 of the present invention The principal part top view of the dishwasher in Embodiment 3 of this invention Side sectional view of a conventional dishwasher

  According to a first aspect of the present invention, there is provided a cleaning tank having a water reservoir for storing an object to be cleaned and collecting cleaning water at an inner bottom thereof, a cleaning nozzle provided in the cleaning tank for injecting the cleaning water onto the object to be cleaned, and the cleaning As a downstream side in the flow of cleaning water at the bottom of the cleaning tank, a cleaning pump for supplying cleaning water to the nozzle and circulating the cleaning water in the cleaning tank, a heater provided in the water reservoir, and heating the cleaning water A leftover collection part provided at the lowest position in the water reservoir, a detergent input part provided in the washing tank, for guiding the introduced detergent to a fixed position at the bottom of the washing tank, and the washing tank. A water level detection device that is provided in communication and detects a cleaning water level, a water supply valve that supplies water into the cleaning tank, and controls and controls various electrical components such as the heater, the cleaning pump, and the water supply valve. Equipped with a control device that performs each process of drying Before the controller starts the water supply by opening the water supply valve, when the user turns on the detergent into the detergent supply part is a dishwasher detergent is placed guided to the vicinity of the heater.

  As a result, it is possible to drastically improve the dissolution rate of the detergent dropped in the vicinity of the heater in response to a rise in the temperature of the washing water and the heat of the heater, which is more efficient than before and higher than the beginning of the washing operation. A dishwasher having detergency can be realized. In addition, by putting detergent in the vicinity of the heater, the dissolution rate of the detergent is greatly improved by heat, so even if detergent is thrown in a larger amount than the rated amount, it will cause undissolved detergent to be generated. There is no.

  According to a second aspect of the present invention, in the first aspect, the detergent charging portion is provided to guide the detergent to a position on the upstream side in the flow of the cleaning water at the bottom of the cleaning tank. Since the generated cleaning liquid can be drawn and circulated while passing around the high-temperature heater along with the operation of the cleaning pump, it is more efficient than before and a dishwasher with higher cleaning power can be installed from the beginning of the cleaning operation. Can be realized.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the detergent charging section is provided to guide the detergent to a downstream position in the flow of the cleaning water at the bottom of the cleaning tank. Since the cleaning liquid of high concentration and high temperature generated in the vicinity can be drawn into the cleaning pump at once by operating the cleaning pump, the detergent is dissolved better before the cleaning water is jetted from the cleaning nozzle. A dishwasher having a higher cleaning power can be realized from the beginning of the cleaning operation while obtaining a high concentration and high temperature cleaning liquid.

  4th invention has a detergent receiving part in which detergent is guide | induced in any one invention among the said 1st-3rd, The said detergent receiving part is a position higher than the said heater, and is supplied with water. By providing it at a position lower than the water level, the cleaning water heated by the heater rises due to the convection phenomenon, and the detergent put in the detergent receiving part is exposed to the cleaning water having a high water temperature, so that the temperature becomes high in a short time. And since a high concentration detergent liquid can be obtained, the dishwasher which can utilize a high concentration and high temperature detergent liquid for washing | cleaning from the beginning of this washing | cleaning is realizable.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the control device stops supplying water at a lower water level than that detected during the cleaning process and is energized to the heater. Then, the cleaning water in the bottom of the cleaning tank is heated and controlled so as not to operate the cleaning pump until the temperature reaches a predetermined temperature. Since a high-temperature washing liquid having a high concentration of detergent can be dissolved, a dishwasher having a higher washing power than before can be realized at the beginning of the washing operation without increasing the amount of detergent.

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

(Embodiment 1)
First, the configuration of the built-in dishwasher according to the first embodiment of the present invention will be described. FIG. 1 is a side sectional view of the dishwasher according to the first embodiment of the present invention, and FIG. 2 is a plan view showing the configuration of the bottom of the washing tub of the dishwasher.

  As shown in FIG. 1, a dishwasher that sprays washing water to wash an object 7 such as tableware includes a washing tank 3 inside a main body 1. Further, the cleaning tank 3 has an opening 2 for taking in and out the article 7 to be cleaned. A table basket 13 (13a, 13b, and 13c) for setting an object 7 to be cleaned is accommodated inside the cleaning tank 3 so that it can be taken in and out from the opening 2. The opening 2 is closed by the lid 11 when the cleaning tank 3 is inside the main body 1 and opened by being pulled out from the main body 1. The lid 11 is moved up and down by a door body opening / closing mechanism (not shown) by a latch and a link mechanism 12. Moreover, the lid | cover 11 seals and closes the opening part 2 watertightly by contact | abutting to a sealing member (not shown).

  A cleaning nozzle 6 is provided at the lower part of the cleaning tank 3 for spraying cleaning water onto the object 7 to be cleaned set in the tableware basket 13 for cleaning. A cleaning pump 5 that supplies cleaning water to the cleaning nozzle 6 and circulates the cleaning water in the cleaning tank 3 is disposed below the cleaning tank 3. The cleaning pump 5 is driven by a motor (not shown) that can rotate in the forward and reverse directions. When the cleaning pump 5 rotates in the forward direction, it functions as a cleaning pump, and when it rotates in the reverse direction, the cleaning water in the cleaning tank 3 is removed from the machine. Operates as a drainage pump.

  In addition, a heater 8 is provided in the lower part of the cleaning tank 3 in order to heat the cleaning water stored in the cleaning tank 3. The periphery of the heater 8 is protected by a heater protection component 9. At the upper position of the heater protection component 9, there is provided a detergent charging unit 14 that is integrated with a tableware basket 13 c that contains small items such as ladders and spoons and guides the loaded detergent onto the heater 8. In order to avoid contact with the object 7 to be cleaned set in the tableware basket 13, the detergent charging unit 14 is disposed at an upstream position in the flow of cleaning water at the bottom of the cleaning tank 3. It is led to the upstream side in the vicinity of the heater 8 through the detergent charging part 14.

  As shown in FIGS. 1 to 2, a water reservoir 4 for storing and heating the cleaning water is provided at the inner bottom of the cleaning tank 3. This position is arranged on a path connecting the heater 8 and the cleaning pump 5. A leftover collection unit 10 having a leftover collection filter (not shown) for collecting leftovers washed away from the cleaning object 7 and a coarse drainage filter (not shown) is provided in the water reservoir 4. Yes. The leftover collection unit 10 is also a drain port from the cleaning tank 3 to the cleaning pump 5. A water supply valve 15 is provided at the rear part of the main body 1. When the water supply valve 15 is operated, tap water is supplied into the cleaning tank 3 through the pipe.

Moreover, the water level detection apparatus 20 provided in the auxiliary water tank 16 is provided in communication with the lower part of the leftovers collection part 10 (drain outlet) by piping. The water level detection device 20 includes a cleaning water level detection device 20a and an overflow water level detection device 20b, and a predetermined detection water level indicates that a reference amount of cleaning water is accumulated in the cleaning tank 3 by the cleaning water level detection device 20a. It is detected at the water level as the (reference water level). The temperature of the cleaning water in the cleaning tank 3 is detected by a temperature detector (not shown) fixed to the outside of the bottom of the cleaning tank 3.

  Further, the main body 1 is provided with a control device 21 that controls various electrical components such as the washing pump 5, the heater 8, the water supply valve 15, and the blower fan 17 to operate the dishwasher. The control device 21 is based on input information input from the input device 19 such as power on / off, course selection, operation start, detection information from the water level detection device 20 or temperature detection device, and a command from the control program. Various electrical components are controlled, and cleaning, rinsing and drying processes are executed.

  Next, the operation and action of the dishwasher configured as described above will be described. Since the basic operation and action of the dishwasher are the same as those of the dishwasher shown as the conventional example, the description thereof is omitted.

  When the controller 21 starts the cleaning operation, the controller 21 first activates the cleaning pump 5 to perform drainage (at this time, the cleaning pump 5 operates as a drainage pump), and then operates the water supply valve 15 so that there is no water. Until the cleaning water level detection device 20a operates, water is supplied into the cleaning tank 3. When the cleaning water level detection device 20a detects the reference detection water level, the control device 21 completes the water supply (main water supply) based on the detection information. The detected water level that serves as a reference for the cleaning water in the cleaning tank 3 at this time is set lower than the water level at the time of subsequent cleaning.

  In the dishwasher of the first embodiment, the control device 21 operates the heater 8 for a predetermined time in a water level state lower than the water level at the time of washing. At this time, the cleaning pump 5 is not operated. As a result, the temperature of the cleaning water stored in the cleaning tank 3 rises. As the temperature of the cleaning water rises, dissolution of the detergent introduced upstream of the flow of cleaning water on the heater 8 by the detergent charging unit 14 is promoted. If the cleaning water temperature does not reach the specified value within the predetermined time, the heater 8 is energized until the cleaning water temperature reaches the specified value. In particular, the maximum activity temperature (optimum temperature) of the component enzyme contained in the detergent used in the dishwasher is approximately 40 ° C. to 60 ° C., and this temperature is maintained for dish stains decomposed by the enzyme. It is possible to clean effectively.

  When the heating of the cleaning water is completed, the control device 21 operates the cleaning pump 5 in an intermittent operation to perform preliminary cleaning. As a result, high-concentration and high-temperature cleaning water is sprayed on the object 7 to be cleaned. At this time, the operation of the cleaning pump 5 does not necessarily need to be intermittent, and may be continuously operated.

  The amount of water in the cleaning tank 3 at the time of subsequent cleaning is determined so that air pollution and performance are not affected through a series of operations in consideration of food contamination adhering to the object 7 to be cleaned and foaming due to detergent components. It is necessary to. Also in the dishwasher according to the first embodiment, the control device 21 energizes the water supply valve 15 for a predetermined time as in the prior art after operating the cleaning pump 5 for a predetermined time, and adds additional makeup water. The amount of water in the washing tank 3 being washed is adjusted to a necessary and sufficient amount of water for washing.

  As described above, the dishwasher according to the first embodiment uses the washing water to the heater 8 without operating the washing pump 5 even when the temperature of the washing water supplied into the washing tank 3 is low in the washing process. It is possible to sufficiently wash the detergent supplied in the washing water with the high-concentration and high-temperature washing water from the beginning of the washing operation. In particular, if the introduced detergent is sufficiently dissolved in the small amount of water in the washing tank 3 before adding makeup water, the washing water having a higher concentration and higher temperature from the beginning of the washing operation start. It becomes possible to perform washing with.

Further, in the dishwasher of the first embodiment, since the detergent is disposed on the upstream heater 8 in the flow of the cleaning water at the bottom of the cleaning tank 3, the heater in which the cleaning water is in a high temperature state with the operation of the cleaning pump 5. Since the dissolution of the detergent is further promoted and the introduced detergent can be sufficiently dissolved in a small amount of water before adding the make-up water from the beginning of the washing operation, It becomes possible to perform washing with higher-concentration and high-temperature washing water.

  Further, since the detergent is drastically improved by heating by putting the detergent in the vicinity of the heater 8, even if the detergent is thrown in a larger amount than the rated amount, the detergent remains undissolved. There is nothing.

  As described above, in the dishwasher of the present invention, even if the water temperature in the washing tub 3 is low, the washing detergent 5 can be sufficiently dissolved without operating the washing pump 5. From the beginning of injection, it becomes possible to perform cleaning with higher-concentration and higher-temperature cleaning water. Therefore, according to the configuration of the dishwasher of the present invention, it becomes possible to obtain high concentration and high temperature washing water before operating the washing pump 5, and pure high concentration and high temperature washing water before mixing with contamination. Can be provided on the object to be cleaned such as tableware for a predetermined period of time, thereby providing a dishwasher capable of obtaining a higher cleaning effect than before with the same amount of detergent (or even with the same amount of water).

(Embodiment 2)
FIG. 3 is a side sectional view of the dishwasher according to Embodiment 2 of the present invention. The difference from the first embodiment of the dishwasher according to the second embodiment is that the detergent input section 14 provided integrally with the tableware basket 13c for inserting small items such as ladders and spoons, The detergent placed in the bottom of the washing tank 3 is positioned downstream of the flow of washing water, that is, so as to fall between the heater 8 and the leftover collection part 10. It is the point which comprised so that it might be guide | induced to the downstream vicinity on the heater 8 via. Other configurations are the same as those in the first embodiment.

  In the dishwasher according to the second embodiment, even if the temperature of the water supplied into the washing tub 3 is low, the washing detergent 5 is washed before adding makeup water without operating the washing pump 5. Since it can be sufficiently dissolved in a small amount of water in the tank 3, it is possible to perform washing with washing water having a high concentration and high temperature from the beginning of injection.

  Further, in the dishwasher according to the second embodiment, the detergent is disposed in the vicinity of the heater 8 near the downstream (residue collection unit 10 side) in the flow of the washing water in the bottom of the washing tub 3, so that the detergent is generated in one area. Since high-temperature and high-concentration cleaning water can be drawn at once with the operation of the cleaning pump 5, it is possible to perform cleaning with a higher cleaning power than when the cleaning water is jetted from the cleaning nozzle 6.

  In addition, if the said Embodiment 2 and the said Embodiment 1 are used together, high concentration washing water can be produced | generated at high temperature in both the upstream and downstream in the flow of washing water, and further washing power Can be improved.

(Embodiment 3)
The structure of the tabletop type dishwasher in Embodiment 3 of this invention is demonstrated. 4 is a side sectional view of the dishwasher according to Embodiment 3 of the present invention, FIG. 5 is a front sectional view of the dishwasher of the dishwasher, FIG. 6 is a front sectional view of the main part of the dishwasher, and FIG. It is a principal part top view of the same dishwasher.

4 and 5, the dishwasher according to the third embodiment includes a washing tub 31 that accommodates an object to be washed 46 such as dishes in the main body 30 of the dishwasher. A table basket 32 for setting the object to be cleaned 46 is disposed inside the cleaning tank 31 so as to be able to be taken in and out from the opening 33.
The opening 33 is closed by the door 34.

  The dishwasher includes a cleaning nozzle 35 provided in the cleaning tank 31 and spraying cleaning water onto the object to be cleaned 46, a cleaning pump 36 for pumping the cleaning water in the cleaning tank 31 to the cleaning nozzle 35, and a cleaning tank 31. A heater 37 provided for heating the cleaning water and a temperature detection means 38 such as a thermistor provided outside the cleaning tank 31 for detecting the temperature of the cleaning water are provided. The periphery of the heater 37 is protected by a heater protection component 39 and a fan case 40 having a ventilation path.

  A water reservoir 31 a is provided on the inner bottom of the cleaning tank 31. The water reservoir 31a is provided with a leftover collection part 41 (drain port) having a leftover collection filter for collecting leftovers washed away from the object to be cleaned 46. A water supply valve 42 is provided at the rear of the main body 30. When the water supply valve 42 is operated, tap water is supplied into the cleaning tank 31 through the pipe. The auxiliary water tank 43 is provided in communication with the lower part of the leftover vegetable collection unit 41 by a pipe, and the water level detection device 44 provided in the auxiliary water tank 43 stores a reference amount of water in the cleaning tank 31. This is detected at the water level as a predetermined detection water level (reference water level).

  A control device 45 is provided below the door 34. This control device 45 is based on the detection information of the temperature detection means 38 and the input information (not shown) input from the input means (not shown) input by the user according to the program storing the control sequence. Then, the heater 37 and the like are controlled to execute the cleaning, rinsing, heating rinsing and drying processes.

  5 to 7, the fan case 40 has a detergent receiving part 47, and the detergent receiving part 47 receives the detergent S introduced through the detergent introducing part 48 provided in the tableware basket 32. It has become. The detergent receiver 47 is provided at a high position above the heater 37 and at a position lower than a predetermined detected water level (reference water level). The detergent receiving portion 47 is substantially L-shaped, and has a standing portion 47b around the holding portion 47a that receives the detergent S below the detergent charging portion 48 to hold the detergent S so that it does not spill. In the flowing water part 47c above the heater 37 which is removed from the lower part of the charging part 48, there is no standing part 47b, the washing water smoothly enters and exits to dissolve the detergent S, and the detergent liquid easily flows out. Can be done. In addition, the cleaning water and the detergent liquid are also moved in and out of the water passage portion 47 d provided at a position lower than the flowing water portion 47 c in the detergent receiver 47.

  In the second embodiment, the detergent receiving portion 47 is configured such that the holding portion 47 a and the flowing water portion 47 c are entirely above the heater 37. The entire detergent receiving portion 47 is not limited to be configured above the heater 37, and at least the flowing water portion 47c may be configured above the heater, and the holding portion 47a may be as many as possible. It is desirable that the portion is formed above the heater 37. In addition, it is desirable that the cleaning water flow in and out as smoothly as possible. For example, a plurality of inflow and outflow portions such as a flowing water portion 47c and a water flow portion 47d are provided, and the convection phenomenon is effectively used by changing the height of these portions This is preferable. Further, the standing portion 47b does not need to be vertical. In short, it is only necessary that the holding portion 47a is formed so that the introduced detergent S is not easily spilled, and the upper end of the standing portion 47b is higher than a predetermined detected water level. It may be provided at the position.

About the dishwasher comprised as mentioned above, the operation | movement and an effect | action are demonstrated. When starting the cleaning operation, the control device 45 first activates the cleaning pump 36 to perform drainage (at this time, the cleaning pump 36 operates as a drainage pump), and then operates the water supply valve 42 so that there is no water. Until the water level detection device 44 operates, water is supplied into the cleaning tank 31. When the water level detection device 44 detects the reference detection water level, the control device 45 completes the water supply (main water supply) based on the detection information. The detected water level serving as a reference for the cleaning water in the cleaning tank 31 at this time is set lower than the water level at the time of the main cleaning that will be executed later.

  In the dishwasher of the third embodiment, the control device 45 operates the heater 37 for a predetermined time in this water level state that is lower than the water level at the time of main washing. At this time, the cleaning pump 36 is not operated. As a result, the temperature of the cleaning water stored in the cleaning tank 31 rises. Before the operation, the detergent is set in the detergent receiving portion 47 in advance, but as shown in FIG. 7, the detergent receiving portion 47 is provided at a high position above the heater 37 and at a position lower than the washing water level. Therefore, the washing water heated by the heater 37 rises by a convection phenomenon, and the detergent thrown into the detergent receiving part 47 is exposed to the washing water having a high water temperature. As the temperature of the cleaning water rises, dissolution of the detergent guided upstream from the flow of cleaning water on the heater 37 is promoted, and a high-temperature and high-concentration detergent liquid can be obtained in a short time. If the cleaning water temperature does not reach the specified value within a predetermined time, the heater 37 is energized until the cleaning water temperature reaches the specified value.

  When the heating of the cleaning water is completed, the control device 45 operates the cleaning pump 36 in an intermittent operation to perform preliminary cleaning. As a result, high-concentration and high-temperature cleaning water is sprayed onto the object to be cleaned 46 and the like. Note that the operation of the cleaning pump 36 is not necessarily intermittent, and may be continuously operated.

  The amount of water in the cleaning tank 31 at the time of the main cleaning performed thereafter takes into account food contamination attached to the object to be cleaned 46, foaming due to detergent components, and the like, and there is no influence on air noise or performance through a series of operations. It is necessary to do so. Also in the dishwasher of the third embodiment, the control device 45 operates the washing pump 36 for a predetermined period of time, then energizes the water supply valve 15 for a predetermined period of time as before, and adds additional makeup water. The amount of water in the cleaning tank 31 being cleaned is adjusted to the amount necessary and sufficient for the main cleaning.

  As described above, the dishwasher according to the third embodiment is configured so that the washing water is first supplied to the heater 37 without operating the washing pump 36 even when the temperature of the washing water supplied into the washing tank 31 is low in the washing step. It is possible to sufficiently wash the detergent supplied in the washing water with the high-concentration and high-temperature washing water from the beginning of the washing operation. In particular, if the introduced detergent is sufficiently dissolved in the small amount of water in the washing tank 31 before adding makeup water, washing water with a higher concentration and higher temperature from the beginning of the washing operation start. It becomes possible to perform washing with.

  In the dishwasher according to the third embodiment, the detergent receiving portion 47 is disposed in the vicinity of the heater 37, particularly on the side opposite to the leftover collection portion 41 and in the direction in which water flows more than the heater 37. On the other hand, it is arranged upstream. With this configuration, the washing water passes through the vicinity of the heater 37 in a high temperature state along with the operation of the washing pump 36, and the dissolution of the detergent is further promoted. Since it can be sufficiently dissolved even in water, it is possible to perform washing with higher-concentration and high-temperature washing water from the beginning of injection at the start of the washing operation. In addition, when the cleaning water is jetted, the detergent receiving portion 47 has a gradient from the fan case 40, so that the detergent is further accelerated by the flow of cleaning water. It is possible to dissolve the detergent efficiently even when the dissolution condition of the detergent is poor, such as a detergent that is difficult to dissolve.

  As described above, according to the configuration of the dishwasher of the present invention, it becomes possible to obtain high-concentration and high-temperature washing water before operating the washing pump 36, and pure pure high-concentration and high-temperature before mixing with contamination. By spraying the washing water onto the object to be washed 46 such as dishware for a predetermined time, it is possible to provide a dishwasher that can obtain a higher washing effect than before with the same amount of detergent (or even the same amount of water).

  As described above, the dishwasher according to the present invention is a high-quality dishwasher that can further increase the cleaning power with the same amount of detergent from the beginning of the washing operation, and is not limited to a built-in type dishwasher. It can also be applied to dishwashers for commercial use.

DESCRIPTION OF SYMBOLS 1,30 Main body 2,33 Opening part 3,31 Cleaning tank 4,31a Water reservoir 5,36 Cleaning pump 6,35 Cleaning nozzle 7,46 Object to be cleaned 8,37 Heater 9,39 Heater protection part 10,41 Leftover Recovery unit 13, 13a, 13b, 13c, 32 Tableware basket 14, 48 Detergent input unit 15, 42 Water supply valve 16, 43 Auxiliary water tank 17 Blower fan 20, 44 Water level detection device 21, 45 Control device 40 Fan case 47 Detergent receiving unit 47a Holding part 47b Standing part 47c Flowing part 47d Water passing part 48 Detergent throwing part

Claims (5)

A cleaning tank that contains an object to be cleaned and has a water reservoir for storing cleaning water at the inner bottom, a cleaning nozzle that is provided in the cleaning tank and that sprays the cleaning water onto the object to be cleaned, and supplies the cleaning water to the cleaning nozzle A cleaning pump for circulating the cleaning water in the cleaning tank, a heater for heating the cleaning water provided in the water reservoir, and a downstream side in the flow of the cleaning water at the bottom of the cleaning tank as the most in the water reservoir. A leftover collection part provided in a low position, provided in the washing tank, provided in communication with the washing tank, a detergent charging part for introducing the introduced detergent to a fixed position in the bottom of the washing tank, Controls various electrical components such as a water level detection device that detects a cleaning water level, a water supply valve that supplies water into the cleaning tank, and the heater, the cleaning pump, and the water supply valve, and performs cleaning, rinsing, and drying processes. And a control device for There before starting the water supply by opening the water supply valve, when the user turns on the detergent into the detergent supply part, dishwasher detergents are guided disposed in the heater vicinity. 2. The dishwasher according to claim 1, wherein the detergent charging unit is provided to guide the detergent to a position on the upstream side in the flow of washing water at the bottom of the washing tank. The dishwasher according to claim 1 or 2, wherein the detergent charging unit is provided to guide the detergent to a downstream position in the flow of washing water at the bottom of the washing tank. It has a detergent receiving part to which detergent is led, and the detergent receiving part is provided in a position higher than the heater and in a position lower than a water level to be supplied with water. The dishwasher described. The control device detects the water level detection device, stops water supply at a lower water level than during the cleaning process, energizes the heater to heat the cleaning water in the bottom of the cleaning tank, and reaches a predetermined temperature. The dishwasher according to any one of claims 1 to 3, wherein the washing pump is controlled not to operate.

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