JP4650335B2 - dishwasher - Google Patents

Description

  The present invention relates to a dishwasher for cleaning dishes by spraying wash water from a washing nozzle toward the dishes, and more particularly to a built-in type dishwasher.

  In this type of conventional dishwasher, a washing cabinet is arranged inside the housing, and a door that rotates downward is provided on the front of the housing, and from inside the washing cabinet with the door open, It has a structure in which a tableware bowl for storing tableware is pulled out horizontally. Then, tap water is introduced into the washing cabinet, stored in the bottom of the washing cabinet, and then the pump is operated to suck in the stored water and feed it to the nozzle. The tableware stored in the washing cabinet is washed.

  With the spread of the system kitchen to general households, built-in type dishwashers for incorporation into the system kitchen are commercially available (see, for example, Patent Document 1).

  FIG. 3 is a longitudinal sectional view of the conventional dishwasher described in Patent Document 1.

  In FIG. 3, this type of dishwasher is a so-called drawer-type dishwasher, and a washing tub 13 in which a dish basket 12 for storing dishes 11 is housed can be pulled forward together with a door 14 that also serves as a front panel. It is configured.

  In the state where the washing tank 13 is pulled out, the upper surface of the washing tank 13 is wide open so that the tableware 11 can be taken in and out from above, and is disposed on the door 14 for pushing the washing tank 13 into the housing 15. By operating the locking operation section 16, the cleaning tank 13 is restrained and the upper lid 17 waiting in the upper space in the housing 15 is lowered to close the upper surface opening 13 a of the cleaning tank 13. Yes.

The cleaning water in the cleaning tank 13 is heated by the heater 18, sucked from the drain port 21 through the residue filter 20 by the cleaning pump 19, and pumped to the cleaning nozzle 22. The tableware 11 disposed and accommodated in the tableware basket 12 is cleaned by the cleaning water sprayed from the cleaning nozzle 22 with vigorous force.
JP 2000-139799 A

  However, not only in such a conventional drawer-type dishwasher, but also in a conventional dishwasher that opens by rotating the door 14 forward, the operation is temporarily stopped during the washing operation, etc. Sometimes you want to put in and out. Therefore, the conventional dishwasher is provided with a door lock switch 23 for detecting whether the door 14 is opened or closed. When the door 14 is opened, the operation of the washing pump 19 is stopped in conjunction with the operation. A device that performs control is known. However, when the door 14 is vigorously opened and the door lock switch 23 is released, the ejection of water from the cleaning nozzle 22 is not completely stopped at that time, and the water is discharged from the cleaning tank 13. There is a problem that when the water jumps out and wets the surroundings, or when the water is hot, there is a risk that the hot water will be applied to the user.

  The present invention solves the above-described conventional problems. When the user tries to pull out the washing tank vigorously, the water ejected from the washing nozzle jumps out and wets the surroundings, or high-temperature water is used by the user. It aims at providing the dishwasher with high safety | security which does not take in.

  In order to solve the above-described conventional problems, a dishwasher of the present invention includes a dishwasher body that opens forward, a washing tub that is movably installed in the front and rear direction in the dishwasher body, and has an opening on the upper side. Position detecting means for detecting movement of the cleaning tank in the front-rear direction, locking means for restricting movement of the cleaning tank at at least two restraining positions of a first restraining position and a second restraining position, and the cleaning tank A cleaning nozzle that is disposed inside and cleans dishes, a pump that supplies water to the cleaning nozzle, and a control unit that controls the operation of the pump and the locking unit. During the restraint of movement, the restraint by the locking means is not released within a predetermined time after the position detecting means detects that the cleaning tank has moved from the first restraining position to the second restraining position. For example, when the washing tub is pushed into the dishwasher body, the position where the further movement to the back is restricted is set as the first restriction position, and once the washing tub at that position is moved forward, Assuming that the restraining position is the second restraining position, even if the user tries to pull out the washing tank vigorously, the washing tank cannot be pulled out before the second restraining position for at least a predetermined time, so that the nozzle is ejected from the nozzle. It is possible to provide a highly safe dishwasher in which water does not jump out and wets the surroundings, and high-temperature water is not applied to the user.

  Further, the dishwasher of the present invention includes a dishwasher body that opens forward, a washing tank that is movably installed in the front and rear direction in the dishwasher body, and that has an opening on the upper side. Position detecting means for detecting the movement, locking means for restricting the movement of the washing tank at at least two restraining positions of the first restraining position and the second restraining position, and the dishes disposed in the washing tank are washed. A cleaning nozzle, a pump for supplying water to the cleaning nozzle, and a control means for controlling the operation of the pump and the locking means, while the cleaning tank is restrained from moving by the locking means. After a predetermined time after the position detecting means detects that the tank has moved from the first restraining position to the second restraining position, the restraint by the locking means is released. Tableware The position where the further movement to the back is restrained when it is pushed into the main body is the first restraining position, and the position once restrained when the cleaning tank at that position is moved forward is the second restraining position. If the position is set to the minimum time required for stopping the pump operation and stopping the ejection of the washing water from the washing nozzle, sufficient safety can be ensured. It is possible to provide an easy-to-use dishwasher without giving the user a waiting time longer than necessary and causing annoyance.

  The dishwasher of the present invention is safe so that when the user tries to pull out the washing tank vigorously, the water ejected from the washing nozzle jumps out and wets the surroundings, and high temperature water does not splash on the user. Is high. In addition, it is possible to provide an easy-to-use dishwasher without unnecessary waiting time after the operation is temporarily stopped after ensuring the safety described above.

  1st invention detects the movement of the front-back direction of the dishwasher main body opened to the front, the washing tank which is installed in the said dishwasher main body so that movement to the front-back direction is possible, and has an opening part upwards Position detecting means, locking means for restraining movement of the washing tank at at least two restraining positions of the first restraining position and the second restraining position, and a washing nozzle arranged in the washing tank for washing dishes And a pump for supplying water to the cleaning nozzle, and a control means for controlling the operation of the pump and the locking means. Within a predetermined time after the position detection means detects that the first restriction position has been moved to the second restriction position, the restriction by the lock means is not released. Body When the position that restrains the further movement to the back when pushed in is the first restraining position, and the position that once restrains when the cleaning tank at that position is moved forward is the second restraining position, Even if the user tries to pull out the washing tank vigorously, the washing tank cannot be pulled out before the second restraint position for at least a predetermined time, so that the water ejected from the nozzle jumps out and wets the surroundings. Can provide a highly safe dishwasher that does not affect the user.

  2nd invention detects the movement of the front-back direction of the dishwasher main body opened ahead, the washing tank which is installed in the said dishwasher main body so that movement to the front-back direction is possible, and has an opening part upwards Position detecting means, locking means for restraining movement of the washing tank at at least two restraining positions of the first restraining position and the second restraining position, and a washing nozzle arranged in the washing tank for washing dishes And a pump for supplying water to the cleaning nozzle, and a control means for controlling the operation of the pump and the locking means. In a predetermined time after the position detecting means detects that it has moved from one restraining position to the second restraining position, the restraint by the locking means is released. Press The position where the further movement to the back when restrained is the first restraining position, the position once restrained when the cleaning tank at that position is moved forward is the second restraining position, If the predetermined time is set to the minimum time required to stop the pump operation and stop the ejection of cleaning water from the cleaning nozzle, sufficient safety can be ensured and It is possible to provide an easy-to-use dishwasher without waiting time longer than necessary and without causing annoyance.

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

(Embodiment 1)
FIG. 1 is a schematic longitudinal sectional view showing the overall configuration of the dishwasher according to the first embodiment of the present invention, in a state where the washing tub is completely accommodated in the dishwasher body. FIG. 2 is an enlarged cross-sectional view of a geared motor mounting portion of the dishwasher.

  1 and 2, the dishwasher according to the present embodiment has a dishwasher main body 1 that opens forward and is formed in a substantially box-like body, and is installed substantially horizontally on the inner sides of both side walls of the dishwasher main body 1. A washing tank 2 that can be drawn and moved in the front-rear direction along the guide rail 1a and that has an opening 2d on the upper side, and a table basket 3 that is arranged inside the washing tank 2 for arranging and arranging the dishes 11; A cleaning nozzle 4 is provided for ejecting water for cleaning the dishes 11.

  The front surface of the washing tub 2 is equipped with a panel 2a having a design similar to that of the system kitchen. The panel 2a is gripped by a user when the washing tub 2 is pulled out of the dishwasher body 1 or stored. A handle portion 2b is provided. A micro switch 5 serving as a position detection means for detecting the movement of the washing tank 2 in the front-rear direction is installed in the rear part of the dishwasher body 1. Further, a geared motor 6 that is a locking means for restricting the movement of the housed washing tub 2 is also installed in the rear part of the dishwasher body 1.

  Note that the dishwasher in the present embodiment has a position detection means and a lock means installed at the rear in the dishwasher main body 1, so that a door opening / closing switch that is indispensable for the front panel of the conventional dishwasher and its It should also be added that a design close to a general system kitchen door or the like can be realized because there is no need to arrange an operation lever or the like.

  Further, above the dishwasher body 1, an inner lid 7 for closing the opening 2d above the washing tub 2 is disposed so as to be movable up and down by a pair of left and right parallel link mechanisms including a pair of front and rear links 7a. ing. Below the washing tank 2, a pump 8 for sucking water and discharging it to the washing nozzle 4 and a control circuit 9 for controlling the operation of the dishwasher are installed.

  Next, the operation of the dishwasher in the above configuration will be described. After the user places the dishes 11 in the dish basket 3 and stores them in the washing tank 2 and puts the detergent, the washing tank 2 is placed on the guide rail 1a. Along the inside of the dishwasher body 1 along the back. This position is the first restraining position. A locking portion 7b provided at the rear end of the inner lid 7 is pushed by the cleaning tank 2, and the inner lid 7 moves backward against the elasticity of the inner lid spring 7c.

  As a result, the inner lid 7 is moved rearward and downward by the link 7 a and closes the opening 2 d above the cleaning tank 2. At the same time, the microswitch 5 installed behind the dishwasher body 1 detects that the washing tub 2 has reached the first restraining position, sends a detection signal to the control circuit 9, and the geared motor 6 is activated. The lock pin 6 a of the geared motor 6 protrudes and fits into a lock pin hole 2 c fixed to the cleaning tank 2 to restrain the movement of the cleaning tank 2.

  At this time, the cleaning tank 2 is not completely restrained and fixed, but as shown in FIG. 2, the cleaning tank 2 is roughly within a range where there is a slight backlash S (for example, a state in which movement of about 3 mm to 8 mm is possible). It is in a restrained state. A position that can move forward by the backlash S from the first restraint position is the second restraint position.

  In the present embodiment, the geared motor 6 from which the pin-shaped component protrudes has been described as an example of the locking means. However, the same locking operation can be performed using, for example, an electromagnetic valve (not shown). is there. When the washing tub 2 is substantially restrained and starts operation, the control circuit 9 controls the operation of the pump 8, the water supply valve (not shown), the heater (not shown), etc., and the tableware stored in the tableware basket 3. 11 washing, rinsing and drying, and a series of dishwashing steps are performed.

  Here, when the tableware 11 is put in and out during the cleaning operation, the user grasps the handle 2b provided on the front surface of the cleaning tank 2 and tries to pull out the entire cleaning tank 2, but the cleaning tank 2 is a locking means. Since it is substantially restrained by the geared motor 6, it moves forward by a few millimeters of backlash S (about 3 mm to 8 mm) and cannot move further due to the resistance of the lock pin 6 a. The microswitch 5 detects that the cleaning tank 2 has been opened by the movement of the cleaning tank 2 from the first restricting position to the second restricting position, and transmits a detection signal to the control circuit 9.

  After that, until the predetermined time elapses, the lock pin 6a of the geared motor 6 is not restored (not lowered), and the lock of the cleaning tank 2 is not released, so that the cleaning tank 2 cannot be opened, Jumping out can be prevented. At this time, the washing tank 2 is restrained by the geared motor 6 for a certain period of time regardless of whether the operation of drawing out the washing tank 2 is performed slowly or quickly. It is possible to secure a time until the ejection of water completely stops, and it is possible to completely prevent the hot washing water from splashing out of the apparatus and causing water leakage or splashing on the user.

  The inventors have confirmed the time required for the operation of the pump 8 to actually stop and the ejection of water from the cleaning nozzle 4 to completely stop in consideration of inertia, but it is necessary for a minimum of 2 seconds. Therefore, in the present embodiment, the predetermined time for restraining the movement of the cleaning tank 2 by the geared motor 6 is set to 3 seconds. In addition, even if a longer time is set in consideration of various margins, the waiting time is too long and it will be very bothersome if it takes more than 5 seconds to unlock. The limit not felt was judged to be 4 seconds. Therefore, the time required to release the lock after detecting that the cleaning tank 2 is opened (the cleaning tank has moved forward by the backlash S) is 3 ± 1 seconds (2 to 4 seconds). Thus, the control circuit 9 was set to control the geared motor 6. Therefore, even if the predetermined time until the lock is released varies and becomes longer, it does not exceed 5 seconds when the user feels annoying the waiting time, and thus the usability can be improved.

  As described above, in the dishwasher according to the present invention, when the user tries to pull out the washing tank vigorously, the ejection of water from the nozzle completely stops, and the water jumps out of the washing tank. It is highly safe so that it does not wet the surroundings and high-temperature water is not applied to the user, and is useful not only as a household dishwasher but also as a commercial dishwasher.

The longitudinal cross-sectional view of the dishwasher in Embodiment 1 of this invention An enlarged cross-sectional view of the geared motor mounting part of the dishwasher Vertical section of a conventional dishwasher

Explanation of symbols

1 Dishwasher body 2 Washing tank 2d Opening 4 Washing nozzle 5 Microswitch (position detection means)
6 Geared motor (locking means)
8 Pump 9 Control circuit (control means)
11 Tableware

Claims (2)

A dishwasher body that opens forward; a washing tank that is movably disposed in the front-rear direction in the dishwasher body and has an opening at the top; a position detection means that detects movement in the front-rear direction of the washing tank; Locking means for restraining movement of the washing tank at at least two restraining positions of the first restraining position and the second restraining position, a washing nozzle arranged in the washing tank for washing dishes, and the washing nozzle A pump for supplying water; and a control means for controlling the operation of the pump and the locking means. The restraining of the movement of the washing tank by the locking means causes the cleaning tank to move from the first restraining position to the second position. A dishwasher characterized in that the restraint by the locking means is not released within a predetermined time after the position sensing means detects that it has moved to a second restraining position. A dishwasher body that opens forward; a washing tank that is movably disposed in the front-rear direction in the dishwasher body and has an opening at the top; a position detection means that detects movement in the front-rear direction of the washing tank; Locking means for restraining movement of the washing tank at at least two restraining positions of the first restraining position and the second restraining position, a washing nozzle arranged in the washing tank for washing dishes, and the washing nozzle A pump for supplying water; and a control means for controlling the operation of the pump and the locking means. The restraining of the movement of the washing tank by the locking means causes the cleaning tank to move from the first restraining position to the second position. A dishwasher characterized in that the restriction by the locking means is released after a predetermined time from the detection of the movement to the second restriction position by the position detection means.