JP2001238847A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the maintenance of washing pumps as well as their related parts, and their parts exchanging working. SOLUTION: It has a washing room 2 which washes tableware, a machine room 3 equipped with a washing tank 4 which supplies washing water to the washing room 2, located under the washing room 2, and a washing pump 18 arranged in the washing tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing objects to be washed such as dishes.

[0002]

2. Description of the Related Art Conventionally, as this kind of dishwasher, Japanese Patent Application Laid-Open No. Hei 6-109518 (A47L15 / 42) discloses:
2. Description of the Related Art There is disclosed a dishwasher for washing dishes by injecting washing water stored in a washing water tank into dishes installed in a washing machine main body.

[0003] The washing pump of this dishwasher is
It is set horizontally below the washing tank, and on the bottom plate of the washing tank,
A substantially L-shaped pipe is provided, and the cleaning tank and the cleaning pump are connected by the L-shaped pipe.

[0004]

In such a conventional dishwasher, since the washing pump is provided at the rear of the dishwasher, various water distribution pipes and electrical equipment are provided around the washing pump, particularly in front of the dishwasher. Goods will be located.

Therefore, for example, at the time of maintenance of the washing pump or at the time of replacing the motor of the washing pump, first,
It was necessary to stop the water supply, remove the water pipe, etc., pull out the dishwasher main body forward, and perform maintenance work and replacement work for the washing pump from the back side. Therefore, there is a problem that the maintenance work related to the cleaning pump and the workability of replacing parts are extremely poor.

The present invention has been made in view of the above-mentioned problems, and provides a dishwasher for improving the workability of maintenance related to a washing pump and replacement of parts.

[0007]

According to the first aspect of the present invention, there is provided a washing chamber for washing dishes and the like, a washing chamber formed below the washing chamber, and washing water provided in the washing chamber. A dishwasher provided with a machine room provided with a washing tank for supplying water, and a washing pump provided in the washing tank.

As described above, since the cleaning pump is provided in the cleaning tank, the cleaning pump can be attached and detached from the cleaning chamber and removed from the upper side of the cleaning tank.

According to the second aspect of the present invention, a cleaning pump provided on a bottom plate of the cleaning tank, a pump motor for driving the cleaning pump and provided below the bottom plate of the cleaning tank, 2. The dishwasher according to claim 1, further comprising a motor mounting / dismounting hole formed at a position of the bottom plate where the cleaning pump is mounted, and having a motor attachment / detachment hole larger than the pump motor.

In this manner, the pump motor is provided below the washing tank bottom plate, that is, outside the washing tank, and the pump motor is provided on the washing tank bottom plate.
Since the motor attaching / detaching hole through which the pump motor can be inserted is formed, the pump motor can be removed to the washing chamber side by removing the cleaning pump and inserting the motor attaching / detaching hole.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a dishwasher equipped with the present invention, FIG. 2 is a front view of the dishwasher equipped with the present invention with a panel removed, and FIG. 3 is a vertical sectional view from the front of the dishwasher. 4 is a vertical sectional view from the side of the dishwasher, FIG. 5 is a plan sectional view of a washing room, FIG. 6 is a plan sectional view of a machine room, and FIG. 7 is an enlarged view of a washing tank showing a mounted state of a washing pump. Fig. 8, Fig. 8 is a plan view of the washing pump, Fig. 9 is a vertical sectional view of the dishwasher when the washing room door is open, Fig. 10 is a vertical sectional view of the dishwasher when the washing room door is closed, and Fig. 11 is FIG. 12 is a vertical cross-sectional view of a dishwasher according to another embodiment when the cleaning chamber door is open, and FIG. 12 is a vertical cross-sectional view of the dishwasher according to another embodiment when the cleaning chamber door is closed.

1 to 4, reference numeral 1 denotes a dishwasher equipped with the present invention, which is defined by a stainless steel box having an open front surface, and a washing chamber 2 for washing an object to be washed, and this washing chamber. 2, a washing tank 4, a rinsing tank 5,
The machine room 3 includes an electrical box 6 and the like.
1A is a pedestal supporting the dishwasher 1, and the height of the dishwasher 1 can be adjusted within a range of 800 mm to 850 mm.

An upper panel 7 is provided on the front upper portion of the dishwasher 1, and on the right side of the upper panel 7, the upper panel 7 is connected to the electrical box 6 for controlling the operation of the dishwasher 1. A control panel 8 is provided.

Further, on the front surface of the cleaning chamber 2 and below the upper panel 7, a cleaning chamber door 9 for opening and closing the opening is provided, and a handle 9 is provided above the cleaning chamber door 9.
A is provided. A machine room panel 10 is also detachably attached to the front of the machine room 3.

Further, a stainless steel top plate 11 is provided on the top surface of the dishwasher 1, and the top plate 11 can be used for wiping water drops of an object to be cleaned on the top plate 11. Thus, the recess 11A is formed. Although not shown, a drain hole is formed in the corner of the concave portion 11A for draining water dropped from an object to be cleaned.
Therefore, the concave portion 11A may be formed to have a gentle slope in the direction of the drain hole to prevent water from accumulating in the concave portion 11A.

As shown in FIGS. 2, 3 and 5, on both left and right sides of the lower portion of the cleaning chamber 2, a rack 12 on which an object to be cleaned is mounted is placed. A rack rail 13 is provided at an opposite position. Further, rotatable upper and lower cleaning nozzles 14A and 14B opposed to each other across the rack rail 13 are provided above and below the cleaning chamber 2, and provided inside the upper and lower cleaning nozzles 14A and 14B, that is, on the rack rail 13 side. In addition, rotatable upper and lower rinsing nozzles 15A and 15B which are vertically opposed to each other are provided.

Further, a water guide plate 16 made of stainless steel, which is inclined left and right, is provided at the top of the washing chamber 2, and the water guide plate 16 causes water droplets to drop on the object to be cleaned after cleaning. Can be prevented as much as possible.

Next, as shown in FIG. 2 to FIG. 5, the cleaning tank 4 is formed in a box body having an upper surface opened and having the bottom plate 4A with as few irregularities as possible. That is, the area of the washing tank 4 is made substantially the same as the area of the washing chamber 2 and the depth is made almost equal in the whole area, and the washing water is stored in the whole area.

As a result, even if the water level is lowered, the surface area of the washing water is increased, so that only about 14 liters of washing water could be stored in a part of a deep portion in the prior art. In the thin washing tank 4 in the form, about 20 liters of washing water can be stored.

A rear end flange 4B which projects forward and is partially cut out is formed at the opening edge of the rear end of the washing tank 4. A front end flange 4C is formed at the front end of the cleaning tank 4 so as to face the rear end flange 4B and protrude forward. And, in these front end flange 4C and rear end flange 4B,
The washing tank filter 17 formed in a stitch shape of about 2 to 3 mm is placed.

A cleaning pump 18 shown in FIGS. 7 and 8 is located in the cleaning tank 4. The cleaning pump 18 supplies cleaning water to the upper and lower cleaning nozzles 14A and 14B. . And the bottom plate 4 of the washing tank 4
A pump motor 19 for rotating and driving the cleaning pump 18 is provided on the machine room 3 side with A interposed therebetween.

The washing pump 18 has a suction port 20A for sucking washing water on the lower surface, and the suction port 20A.
A cylindrical resin casing 20 which is located above and has a discharge port 20 </ b> B for discharging the cleaning water on the side surface.
Is attached to the rotation shaft 19A of the pump motor 19, and is located above the suction port 20A.
0 and the casing 2
The upper plate 22, which is attached to the lower surface of the upper plate 0 and has a hole formed at the same position as the suction port 20A, is separated from the upper plate 22 by a plurality of cylindrical spacers 23 at a predetermined interval (for example, about 15 mm).
And a lower plate 24 that is provided.

The space between the spacers 23 is, for example,
By setting the width such that a cleaning target such as a spoon or a fork cannot pass through, even if the cleaning target accidentally falls into the cleaning tank 4, the cleaning pump 18 is prevented from being damaged as much as possible because it is caught by the cylindrical spacer 23. Can do things.

Further, since the impeller 21 is located above the suction port 20A of the casing 20, a part of the object to be cleaned, for example, a handle of a spoon or a fork, reaches the suction port 20A. Also, upper plate 2
Since the impeller 21 does not reach the impeller 21 between the lower plate 2 and the lower plate 24, damage to the impeller 21 due to an object to be cleaned can be prevented. Therefore, it is not necessary to separately provide a cleaning pump filter or the like, and cost can be reduced.

Further, since the suction port 20A of the cleaning pump 18 is set downward and the cleaning water is sucked from the entire peripheral surface of the cleaning pump 18, the thickness of the cleaning tank 4 is reduced and the water level is low. In addition, the generation of the vortex can be prevented as much as possible, and even if the vortex occurs, the suction of the air can be prevented as much as possible.

Further, a motor attachment / detachment hole 25 through which the pump motor 19 can be inserted is formed in the washing tank 18 at the washing pump 18 mounting portion of the washing tank bottom plate 4A, and the rotating shaft 19A of the pump motor 19 faces upward. Thus, the lower plate 24
Attached to. Therefore, the pump motor 19
Is located below the washing tank 4.

That is, the cleaning pump 18 and the pump motor 19 are opposed to each other with the lower plate 24 interposed therebetween, and are formed in a unit shape. The lower plate 24 is connected to the motor mounting hole 2 of the bottom plate 4A.
5 is attached via a hermetic packing 26 formed of a member such as soft rubber.

As described above, since the pump motor 19 is placed vertically and the motor attaching / detaching hole 25 larger than the diameter of the pump motor 19 is formed, when the pump motor 19 is detached, it is only necessary to pull it upward.

The washing tank 4 is provided with a drainage drain 27 for keeping the level of the washing water constant. The drain 27 is attached to a drain 28 having a drain formed in the bottom plate 4A. Since the drainage port of the drainage section 28 is formed in the bottom plate 4A, it is located below the suction port 20A of the cleaning pump 18. In addition, a cleaning water heater 29 for maintaining the cleaning water at a predetermined temperature, for example, about 60 ° C., is provided in the cleaning tank 4.

As described above, by mounting the pump motor 19 directly below the cleaning pump 18 and forming the motor attaching / detaching hole 25 in the bottom plate 4A of the cleaning tank 4, the cleaning pump 18 and the pump motor 19 are connected to the cleaning tank filter. 17 can be removed from the inside of the cleaning tank 4, and the workability of attaching and detaching the cleaning pump 18 can be improved.

The drain port of the drain section 28 is provided with the cleaning pump 1.
8 is located below the suction port 20A, so that when the drainage drain 27 is drained and the washing water in the washing tank 4 is drained, the washing water is prevented from remaining in the casing 20 of the washing pump 18 as much as possible. it can.

Next, as shown in FIGS. 3, 4 and 6, the rinsing tank 5 is located at a small interval below the washing tank 4, and is located on the left side of the rinsing tank 5. Is provided with a pump motor 19 of the washing pump 18 and the electrical box 6 on the front side.

Also, in this rinsing tank 5, water supplied from an external water supply system through the water supply pipe 30 and the water supply solenoid valve 31 is used as rinsing water. A water heater 32 is provided.
Further, a rinse pump 33 for supplying the rinse water heated in the rinse tank 5 to the upper and lower rinse nozzles 15A and 15B is mounted on the front side of the rinse tank 5 and beside the electrical box 6. ing.

As described above, since the washing tank 4 is made thin and the rinsing tank 5 which is higher in temperature than the washing tank 4 is arranged below the washing tank 4 with a small gap, heat is radiated from the rinsing tank 5. The washing tank 4 can be heated.

Accordingly, the amount of heating of the washing water heater 29 is reduced, thereby achieving an energy saving effect and the washing tank 4
Since the rinsing tank 5 is not in contact with the rinsing tank 5, heat of the rinsing tank can be prevented from leaking to the washing tank through the tank wall surface, and the temperature of the rinsing water in the rinsing tank is reduced to the temperature of the rinsing water in the washing tank. It can be prevented from being dropped.

The decrease in the amount of heating of the washing water heater 29 is as follows.
Specifically, the duty of the washing water heater 29 is reduced, or the heat capacity of the washing water heater 29 is reduced from the design stage.

Further, by making the washing tank 4 thin and forming a space in which the rinsing tank 5 can be stored below the washing tank 4, the drainage level of the washing tank 4 can be increased. A space of 175 mm can be secured. For this reason, the drainage can be smoothly introduced from the drainage pipe provided in the drainage section 28 to the drainage pit formed on the installation floor, and the drainage property can be improved.

Next, a water pipe for supplying and draining water of the dishwasher 1 will be described with reference to FIGS. First, the rinsing tank 5 is provided with a water supply pipe 30 for introducing water from a water supply system, as described above.
Is located on the front side of the rinse tank 5. Also,
The rinse pump 33 is also located in front of the rinse tank 5 similarly to the water supply pipe 30, and a rinse pump discharge pipe 34 is connected to the rinse pump 33.

As described above, since the water supply pipe 30 is disposed in front of the dishwasher 1, workability when the dishwasher 1 is installed is improved, and the water supply pipe 30 is twisted and the water supply pipe 30 itself and the water supply pipe 30 are dispensed. It can prevent that load is applied to nuts etc. when connecting to the external water supply system.

The rinse discharge pipe 34 is located in the washing tank 4 and is connected to a rinse water supply pipe 35A for supplying rinse water to the rinse nozzle 15A. In order to supply rinsing water to the lower rinsing nozzle 15B, a lower rinsing water supply pipe 35B branches off from the upper rinsing water supply pipe 35A.

Accordingly, the water introduced from the water supply system is heated in the rinsing tank 5, and is rinsed as rinsing water to the rinsing nozzle 15A via the rinsing water discharge pipe 34 and the rinsing water supply pipe 35A. The water is supplied to the rinsing nozzle 15B via the rinsing water supply pipe 35B branched from the water supply pipe 35A.

On the other hand, the washing tank 4 is connected to the discharge port 20B of the washing pump 18,
Cleaning water supply pipe 3 for supplying cleaning water to 4A, 14B
The cleaning water supply pipe 36 has a cylindrical shape made of 1 mm thick stainless steel (SUS304).

As described above, since the cleaning pump 18 is provided near the cleaning water supply pipe 36 in the cleaning tank 4, the cleaning pump 18 and the cleaning water supply pipe 36 can be connected at the shortest distance. Upper and lower cleaning nozzles 14A, 1 of cleaning pump 18
The cleaning water supply capacity to 4B can be greatly improved.

Further, the cleaning pump 18 itself is used as the cleaning tank 4.
Since it is located in the washing water inside, the piping that connects the washing pump 18 and the washing water supply pipe 36 and the waterproof seal between the washing tank and the piping, etc., which were required in the past, become unnecessary, and the cost can be significantly reduced. Becomes

The washing water supply pipe 36 extends laterally along the bottom surface 4A in the washing tank 4 to almost the center of the back of the washing chamber 2, and forms the back of the washing chamber 2. It extends upward along the face plate 37. The upper rinse water supply pipe 35A and the lower rinse water supply pipe 35B are located beside the cleaning water supply pipe 36.

Further, the washing water supply pipe 36, the upper rinsing water supply pipe 35A and the lower rinsing water supply pipe 35B are located in notches formed in the rear end flange 4B of the washing tank 4, and the notches are provided. Are the tubes 36, 35A, 3
The cleaning chamber 2 is separated from the cleaning tank 4 by covering the cleaning chamber 2 with the partition plate 38 in which the 5B is inserted.

Although the pipes 36, 35A and 35B are inserted through the partition plate 38 of the present embodiment, the notch of the rear end flange 4B is fitted to the pipes 36, 35A and 35B. The partition plate 38 also has pipes 36, 35A, 3
A U-shaped notch that fits into 5B may be provided. In this case, attachment and detachment of the partition plate 38 become easy.

As described above, the cleaning chamber 2 and the cleaning tank 4 can be partitioned by the cleaning tank filter 17, the rear end flange 4B of the cleaning tank 4 and the partition plate 38. The residue that falls during the washing of the cleaning tank filter 17 is surely received by the washing tank filter 17.

Further, the washing water supply pipe 36 is connected to the rack 1
(2) It also has a function as a rack stopper at the time of loading, and it is not necessary to form a rack stopper on the rack rail 13 or the like, and it is not necessary to extend the rear end of the rack rail 13 more than necessary. Can be planned.

Next, the upper panel 7 is made of stainless steel and is inclined so that the lower part protrudes forward as shown in FIGS. Then, it projects by a predetermined amount A from the front surface 40 of the cleaning chamber door 9 shown in FIG. By inclining the upper panel 7 in this manner, the control panel 8 provided on the upper panel 7 faces obliquely upward, and the operability of the user can be improved. Further, the lower part of the upper panel 7 is projected forward by a predetermined amount A, so that when the cleaning chamber door 9 is opened, the cleaning chamber 2 is opened.
It is possible to prevent the steam generated from falling on the control panel 8 as much as possible.

FIGS. 11 and 12 show another embodiment, in which a reverse inclined portion 39 inclined toward the cleaning chamber 2 is formed below the upper panel 7. As shown in FIG. 12, when the cleaning chamber door 9 is closed, the lower end of the reverse inclined portion 39 is located closer to the cleaning chamber 2 than the front surface 40 of the cleaning chamber door 9.

With the above configuration, when the cleaning chamber door 9 is opened, the steam generated from the cleaning chamber 2 can be prevented from hitting the control panel 8 as much as possible. Even if dew forms, the dew drops along the reverse inclined portion 39 and drops on the back surface 41 of the cleaning chamber door 9,
Since the water is guided to the washing room 2, it is possible to prevent condensation water from dripping on the front side of the dishwasher 1 as much as possible.

Further, by inclining the upper surface 42 of the cleaning chamber door 9 toward the cleaning chamber 2, even when the cleaning chamber door 9 is closed, the dew passes along the reversely inclined portion 39 and the cleaning chamber door 9. 9 and is guided to the washing room 2 side, so that the condensation water can be prevented from dripping to the front side of the dishwasher 1 as much as possible.

With the above configuration, the dishwasher 1 of the present invention is constructed.
Will be described. First, water supply to the rinsing tank 5 is started. This is because the water supply solenoid valve 31 opens.
A predetermined amount of water is supplied from the external water supply system to the rinsing tank 5 through the water supply pipe 30, and the supplied water is heated to about 80 ° C. by the rinsing water heater 32 of the rinsing tank 5.

The rinse water heated to about 80 ° C. is supplied to the upper and lower rinse nozzles 15A and 15B by the rinse pump 33 via the rinse pump discharge pipe 34 and the vertical rinse water supply pipes 35A and 35B. And the rinse water
After being sprayed from the upper and lower rinsing nozzles 15A and 15B into the cleaning chamber 2, the hot water is supplied into the cleaning tank 4 through the cleaning tank filter 17.

Here, since the capacity of the rinsing tank 5 is smaller than the capacity of the washing tank 4, the above operation is repeated a plurality of times, and the water level sensor 43 provided in the washing tank 4 detects the full water level. Continue until you do. Further, since it takes time until the washing tank 4 detects the full water level, the washing water heater 29 keeps the temperature at about 60 ° C. during that time. Then, when the washing tank 4 reaches the full water level, a detergent is supplied into the washing tank 4 by a detergent supply device (not shown), and is used as washing water.

In this state, since the object to be cleaned can be cleaned, the cleaning chamber door 9 is opened and the rack 12 on which the object to be cleaned is placed is stored as shown in FIG. Here, by pushing the rack 12 deep into the cleaning room 2, the rack 1
The rear end of the rack 2 comes into contact with the cleaning water supply pipe 36, and the rack 12 is at an appropriate position where cleaning can be performed.

Next, by pressing a cleaning switch (not shown) of the control panel 8, the pump motor 19 is turned on.
Drives the cleaning pump 18 to rotate. As a result, the cleaning water in the cleaning tank 4 is supplied to the suction port 20A of the cleaning pump 18.
From the outlet port 20B and the washing water supply pipe 3
6 and supplied to the upper and lower cleaning nozzles 14A and 14B.

The upper and lower washing nozzles 14A, 14A
The cleaning water is sprayed while B rotates, and the object to be cleaned placed on the rack 12 is cleaned. The injected cleaning water is
Thereafter, the cleaning tank filter 17 of the cleaning tank 4 is used.
And returns to the washing tank 4. For this reason, the large residue etc. which fell from the to-be-cleaned thing are caught by the washing tank filter 17, and do not return in the washing tank 4.

After such a cleaning operation is continued for a predetermined time,
Move to rinsing operation. In the rinsing operation, the pump motor 19 is stopped, and the already stored rinsing water of about 80 ° C. is driven by the rinsing pump 33 and supplied to the upper and lower rinsing nozzles 15A and 15B.

By driving the rinse pump 33, the rinse water in the rinse tank 5 is sent to the vertical rinse nozzles 15A and 15B via the rinse pump discharge pipe 34 and the vertical rinse water supply pipes 35A and 35B.

Then, the upper and lower rinsing nozzles 15A and 15B
The rinse water sprayed from the rinsing water rinses off the cleaning water adhered to the object to be cleaned, passes through the cleaning tank filter 17, and is guided into the cleaning tank 4.

Here, when the rinsing water enters the washing tank 4, the washing water in the washing tank 4 is removed from the drainage drain 27.
Is drained from the upper portion to a drain portion 28, and drains from a drain pipe connected to the drain portion 28 to a drain pit formed on the installation floor surface.

Normally, small residues and the like passing through the washing tank filter 17 often have a lower specific gravity than water. Therefore, when rinsing water enters the washing tank 4, residues floating on the surface of the washing water are also drained. It will be discharged from 27 to the drain pit.

When the above cleaning and rinsing operations are completed, the cleaning chamber door 9 is opened to open the rack 12 on which the object to be cleaned is placed.
Pull out. At this time, since a large amount of steam is generated in the cleaning chamber 2 by the high-temperature rinsing water, the steam is blown out of the cleaning chamber 2 simultaneously with opening of the cleaning chamber door 9.

Here, by forming the upper panel 7 as shown in FIG. 9 and FIG. 10, FIG. 11 and FIG. 12, it is possible to prevent the steam from being directly applied to the control panel 8 as much as possible. it can.

[0067]

As described above in detail, according to the first aspect of the present invention, since the cleaning pump is provided in the cleaning tank, the cleaning pump is attached and detached from the cleaning chamber, and the cleaning pump is inserted from above the cleaning tank. Can be removed. Accordingly, maintenance work and replacement workability of the cleaning pump are improved.

According to the second aspect of the present invention, the pump motor is provided below the bottom plate of the washing tank, that is, outside the washing tank, and a motor attaching / detaching hole through which the pump motor can be inserted is formed in the bottom plate of the washing tank. Can be removed to the cleaning chamber side by removing the cleaning pump and inserting the motor mounting hole. Therefore, maintenance work and replacement workability of not only the cleaning pump but also a pump motor for driving the cleaning pump can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a dishwasher equipped with the present invention.

FIG. 2 is a front view of the dishwasher equipped with the present invention in a state where a panel is removed.

FIG. 3 is a vertical sectional view from the front of the dishwasher.

FIG. 4 is a vertical sectional view from the side of the dishwasher.

FIG. 5 is a plan sectional view of a cleaning chamber.

FIG. 6 is a plan sectional view of a machine room.

FIG. 7 is an enlarged view of a cleaning tank showing a mounted state of the cleaning pump.

FIG. 8 is a plan view of the cleaning pump.

FIG. 9 is a vertical cross-sectional view of the dishwasher when the cleaning room door is opened.

FIG. 10 is a vertical cross-sectional view of the dishwasher when the washing room door is closed.

FIG. 11 is a vertical cross-sectional view of a dishwasher according to another embodiment when a cleaning room door is opened.

FIG. 12 is a vertical sectional view of a dishwasher according to another embodiment when a washing room door is closed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dishwasher 2 Cleaning room 3 Machine room 4 Cleaning tank 4A Bottom plate 18 Cleaning pump 19 Pump motor 25 Motor attaching / detaching hole

Claims (2)

[Claims] 1. A washing room for washing dishes and the like, a machine room formed below the washing room and provided with a washing tank for supplying washing water to the washing room, and a washing pump provided in the washing tank A dishwasher comprising: 2. A washing pump provided on a bottom plate of the washing tank, a pump motor for driving the washing pump, and a pump motor provided below the bottom plate of the washing tank; The dishwasher according to claim 1, further comprising a motor attachment / detachment hole formed and larger than the pump motor.