JP3609865B2 - Cleaning device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a cleaning apparatus having an improved opening / closing structure of a cleaning chamber.
[0002]
[Prior art]
For example, a dishwasher having a structure shown in FIG. 5 is known. This is a configuration in which a cleaning nozzle 2 and a rinsing nozzle 3 are rotatably provided above and below the cleaning chamber 1 with the front surface opened, and the open front surface is opened and closed by a door 5 that rotates about a shaft 4. . When tableware is put in the cleaning chamber 1 and the operation switch is turned on, the tableware cleaning operation is executed. In the process, the cleaning nozzle 2 rotates and the cleaning liquid is ejected, and the rinsing nozzle 3 rotates to rinse hot water. Is ejected.
[0003]
[Problems to be solved by the invention]
By the way, when the user opens the door during the above-described cleaning operation, the cleaning liquid or the like ejected from the cleaning nozzle or the rinsing nozzle jumps out from the front opening of the cleaning chamber. In order to prevent this, a door switch has been provided to stop the operation when the door is opened, but it is still difficult to stop the operation instantaneously due to the rotational inertia of the motor, etc. Therefore, it was not possible to completely prevent the cleaning liquid from jumping out.
Therefore, various safety devices such as a door lock device and releasing the lock after the motor or the like has been completely stopped are considered, but since the structure becomes complicated, the cost increases considerably. Incurs the problem of increased failure. For this reason, in many models, after providing a door switch, after confirming that the rotation of the nozzle has stopped, it is only possible to give a notice to open the door.
[0004]
The present invention has been made in view of the above circumstances. The purpose is to provide a washing machine that can reliably prevent the washing liquid from jumping out with a simple structure.
[0005]
[Means for Solving the Problems]
The cleaning machine of the present invention is such that a cleaning chamber having a cleaning nozzle inside is opened and closed by a door, an inner door provided inside the door for opening and closing the cleaning chamber, and the inner door. An energizing portion that always energizes in the opening direction, and a liquid storage for accumulating liquid that is provided on the inner door and splashes from the nozzle and holds the inner door in a closed state against the energizing portion by its liquid weight. And an outflow port for naturally flowing out the liquid received in the liquid storage unit. The opening diameter of the outflow port is set so that the amount of liquid flowing into the liquid storage unit during the cleaning operation is determined by the outflow amount from the outflow port. The present invention is characterized in that the size is set to be smaller than the inflow amount (Invention of Claim 1). In this case, the door may be provided with an interlocking protrusion for abutting the inner door during the closing operation to close the inner door against the urging force of the urging portion (invention of claim 2). .
[0006]
[Action]
When the cleaning operation is executed by closing the inner door and the door of the cleaning chamber, the cleaning liquid or the like is ejected from the nozzle in the cleaning chamber, and the object to be cleaned in the cleaning chamber is cleaned. During execution of this cleaning operation, the liquid ejected from the nozzle flows into the liquid storage part of the inner door, so that the liquid storage part is always filled with the liquid even though the liquid flows down from the outlet.
If the door is opened here, the liquid weight of the liquid stored in the liquid storage part of the inner door exceeds the urging force to open the inner door, so the inner door continues to be held closed, Even if the momentum at which the liquid is ejected from the nozzle is still strong, the liquid is not blocked by the inner door and jumps out. If the momentum of the liquid ejected from the nozzle is reduced after the washing operation is finished, the amount of liquid flowing into the liquid storage portion is also rapidly reduced, and the outflow amount from the outlet becomes superior. For this reason, when the liquid ejection from the nozzle is sufficiently weakened, the liquid weight in the liquid storage part becomes light, the urging force of the urging part is overcome, and the inner door is naturally opened. That is, the inner door is naturally opened after a certain time from the stop of the cleaning operation.
In the invention of claim 2, when the door is closed, the inner door is also naturally closed by the interlocking projection.
[0007]
【The invention's effect】
The effects of the present invention are as follows. Even if the door is opened when cleaning liquid or the like is ejected from the nozzle, the inner door is closed, so that the liquid can be reliably prevented from jumping out. Further, since the inner door automatically opens when the momentum of liquid ejection from the nozzle is weakened, it is not necessary to open the inner door by hand following the door. In addition, this delayed opening operation has been accomplished skillfully by utilizing the balance between the biasing force in the opening direction of the inner door and the liquid weight accumulated in the liquid storage part, so the structure is extremely simple and reliable. In addition to high performance, manufacturing costs can be greatly reduced.
Furthermore, according to the invention of claim 2, since the inner door can also be closed using the operation of closing the door, there is an advantage that the operability is further improved.
[0008]
【Example】
Hereinafter, an embodiment in which the present invention is applied to a dishwasher will be described with reference to FIGS.
In the figure, reference numeral 10 denotes an outer box in which an opening 11 is formed on the upper front surface. A cleaning tank 12 having an open upper surface is disposed therein, and the upper space thereof serves as a cleaning chamber 13. The opening 11 of the cleaning chamber 13 can be opened and closed by a door 15 rotatably supported by a pivot 14, and when the door 15 is opened by placing a hand on the handle 16, the open state is maintained by weight balance. When the door 15 is closed, the closed state is maintained by its own weight.
A cleaning nozzle 17 and a rinsing nozzle 18 are rotatably provided at the top and bottom of the cleaning chamber 13, respectively. A cleaning liquid reservoir 19 is formed in the cleaning tank 12 so as to be deeper. The cleaning liquid stored in the cleaning tank 12 is supplied to the cleaning nozzle 17 through a pipe 21 by a circulation pump 20. The cleaning liquid is jetted into the cleaning chamber 13 while being rotated by the reaction force. A rinsing water tank 22 is provided below the washing tank 12, and hot water for rinsing stored therein is supplied to the rinsing nozzle 18 through a pipe 24 by a rinsing pump 23, thereby rinsing the nozzle. Hot water can be jetted into the cleaning chamber 13 while rotating 18 with a reaction force.
[0009]
Now, an inner door 25 formed of plastic having excellent heat resistance and chemical resistance is provided inside the door 15. This can be rotated coaxially with the pivot 14 of the door 15, and can open and close the opening 11 opened by the door 15 by rotating. Further, the inner door 25 is formed in a bowl shape so as to be folded back to the inside of the cleaning chamber 13, thereby forming a liquid storage portion 26 for storing a cleaning liquid and the like in the cleaning chamber 13. When the cleaning operation is performed, the cleaning liquid and the rinsing water sprayed from the cleaning nozzle 17 or the rinsing nozzle 18 flow into the liquid storage section 26. An outlet 27 is formed at the bottom of the liquid reservoir 26. The diameter of the outlet 27 is set so that cleaning water or the like that has flowed in during the cleaning operation is accumulated in the liquid reservoir 26 to fill it. The size is set so that it will flow out in a short time after the operation is completed.
[0010]
On the other hand, a spring hanging piece 28 is provided on the inner wall of the cleaning chamber 13 of the outer box 10, and a tension coil spring 29 corresponding to the urging portion is stretched between this and the rear edge of the inner door 25. Thus, the inner door 25 is always urged in the opening direction. The biasing force of the tension coil spring 29 is such that the inner door 25 is opened by the tension coil spring 29 in the state where only the own weight of the inner door 25 acts without storing the cleaning liquid or the like in the liquid storage portion 26, and the liquid storage When the cleaning liquid or the like is filled in the portion 26, the inner door 25 is set to be kept closed by the weight of the liquid. Further, on the inner surface of the door 15, when the inner door 25 is overlapped as shown in FIG. 3, the interlocking protrusion that engages with the rear edge is located at a position corresponding to the rear edge of the inner door 25. 30, and the rear edge of the inner door 25 urged by the tension coil spring 29 is in contact with the interlocking protrusion 30. Although not shown, the outer box 10 is provided with a door switch for detecting the opening of the door 15, and when the opening is detected, the pumps 20, 23 are disconnected.
[0011]
Next, the operation of this embodiment will be described. In order to wash the tableware, the handle 16 is put on the hand, the door 15 is opened, and the tableware is accommodated in the washing chamber 13. At this time, when the door 15 is opened, the interlocking protrusion 30 rotates integrally and retracts backward, so that the inner door 25 is opened and rotated by the spring force of the tension spring 29. Therefore, even if the opening 11 of the cleaning chamber 13 is doubly closed by the door 15 and the inner door 25, the opening 11 is naturally opened by simply opening the door 15 by hand.
Therefore, when the tableware is accommodated in the cleaning chamber 13 and the handle 15 is put on the hand 16 and the door 15 is rotated in the closing direction, the interlocking protrusion 30 of the door 15 is engaged with the rear edge of the inner door 25. Is closed together with the door 15. When the door 15 reaches the closed position completely, the door 15 and the inner door 25 are held in the closed state by its own weight.
Thereafter, when the operation switch (not shown) is turned on, the circulation pump 20 and the rinsing pump 23 are sequentially operated, the cleaning liquid is ejected from the cleaning nozzle 17, and the hot water for rinsing is ejected from the rinsing nozzle 18. And rinsing is performed. During such a cleaning operation, the cleaning liquid ejected from the nozzles 17 and 18 collides with the inner wall of the cleaning chamber 13 and flows down into the cleaning tank 12, but a part of the collision with the inner wall of the inner door 25 is performed. Then, it travels down the inner wall and flows into the liquid reservoir 26. The inflowing liquid flows down into the cleaning tank 12 from the outlet 27 of the liquid storage unit 26, but since the amount of liquid flowing into the liquid storage unit 26 is large during execution of the cleaning operation, the cleaning liquid or the like is contained in the liquid storage unit 26. Is satisfied and is always overflowing.
[0012]
Even if the rinsing pump 23 is cut off due to the end of the washing operation, the motor continues to rotate for a while because of the inertia. Hot water continues to erupt. At this time, the user may open the door 15 because the cleaning operation has been completed. Then, in this embodiment, as described above, the interlocking protrusion 30 rotates integrally and retracts backward, but the liquid storage portion 26 of the inner door 25 is filled with rinsing hot water. The moment in the closing direction due to the liquid weight exceeds the moment in the opening direction due to the urging force of the tension coil spring 29, and as a result, the inner door 25 continues to be held in the closed state. Therefore, even if the door 15 is opened immediately after the operation and the rinsing water is still ejected from the rinsing nozzle 18, the rinsing water is not blocked by the inner door 25 and jumps outside. 0013
Thereafter, the momentum of the rinsing hot water ejected from the rinsing nozzle 18 gradually declines, and when the amount flowing into the liquid storage portion 26 decreases rapidly, the outflow amount from the outlet 27 of the liquid storage portion 26 becomes superior. The liquid weight in the liquid storage part 26 is reduced, the moment in the opening direction by the tension coil spring 29 is overcome, and the inner door 25 is naturally opened. That is, in this embodiment, when the door 15 is opened immediately after the end of the cleaning operation, the inner door 25 is automatically turned on when the rinsing water jet is sufficiently weakened and delayed by a certain time from the end of the cleaning operation. Will be released.
[0014]
Even if the door 15 is inadvertently opened during the cleaning operation, the door switch detects the opening of the door at that time and powers off the pumps 20 and 23. The inner door 25 is automatically opened when the ejection of the above becomes sufficiently weak and safe.
Thus, according to the present embodiment, when the cleaning liquid is ejected from the nozzles 17 and 18 during or immediately after the end of the cleaning operation, the inner door 25 is closed even if the door 15 is opened. Further, it is possible to reliably prevent the cleaning liquid or the like from jumping out. Further, since the inner door 25 automatically opens when the momentum of liquid ejection from the nozzles 17 and 18 is weakened, it is not necessary to open the inner door 25 by hand following the door 15, which is easy to use. . In addition, in this embodiment, such a delayed opening operation is skillfully achieved by utilizing the balance between the urging force in the opening direction of the inner door 25 and the liquid weight accumulated in the liquid storage unit 26. Is extremely simple and highly reliable, and the manufacturing cost can be greatly reduced. In addition, in this embodiment, when the interlocking protrusion 30 is provided on the door 15 and the door 15 is turned and closed, the inner door 25 is also turned and closed accordingly. This operation becomes unnecessary, and the inner door 25 is provided to form a double structure, but the opening / closing operation need not be considered at all.
[0015]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and are within the scope not departing from the gist of the present invention other than the following. Various modifications can be made.
(1) In the above embodiment, the door 15 is in a closed state and is maintained in its closed state by its own weight. However, the present invention is not limited to this. For example, a door lock mechanism is provided to securely close the door. Also good. In this case, a switch for detecting that the door lock mechanism is unlocked may be provided, and the pump or the like may be disconnected based on the switch operation.
[0016]
(2) In the above embodiment, the inner door 25 is biased in the opening direction by the tension coil spring 29. However, the present invention is not limited to this, and an arm is provided on the pivot of the inner door and a weight attached to the tip of the arm An urging force in the closing direction may be applied.
(3) Although the example applied to the tableware washing machine was shown in the above-mentioned embodiment, the object to be washed is not limited to tableware, and can be widely applied to washing machines that perform washing by spraying a washing liquid with a nozzle into the washing chamber. .
[Brief description of the drawings]
1 is an overall longitudinal sectional view showing an embodiment of the present invention. FIG. 2 is a partially enlarged longitudinal sectional view showing a door closed state. FIG. 3 is a partially enlarged longitudinal sectional view showing a door opened state. ] Partial enlarged vertical sectional view showing the open state of the inner door [FIG. 5] Vertical sectional view showing an example of a conventional dishwasher [Explanation of symbols]
DESCRIPTION OF SYMBOLS 13 ... Cleaning room 15 ... Door 17 ... Cleaning nozzle 18 ... Rinsing nozzle 25 ... Inner door 26 ... Liquid storage part 27 ... Outlet 29 ... Coil spring (biasing part) 30 ... Interlocking protrusion

Claims (2)

A cleaning chamber provided with a cleaning nozzle is opened and closed by a door. An inner door provided inside the door for opening and closing the cleaning chamber, and the inner door is always urged in an opening direction. An urging portion that receives the liquid splashed from the nozzle provided in the inner door, and holds the inner door closed by the liquid weight against the urging portion, and the liquid An outlet that naturally flows out the liquid received in the reservoir , and the outlet diameter of the outlet is smaller than the amount of liquid flowing into the liquid reservoir during the cleaning operation. A cleaning device characterized in that it is set to such a size . The interlocking projection for contacting the inner door and closing the inner door against the urging force of the urging portion when the door is closed is provided on the door. Cleaning device.

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