JPH09195993A - Motor-driven pump and dish washer using same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a cost of a dish washer and carrying out downsizing by arranging a blower chamber having a blower impeller and a pump chamber having a pump impeller adjacently to each other on the outlet side of a motor, and installing the blower impeller and the pump impeller out outlet shaft of the motor respectively. SOLUTION: A blower pipe is connected to the blowing port 39 of a blower 30, when a motor 10 is driven in a condition in which water is fed into a pump chamber 22, a pump impeller 27 fixed to an output shaft 11 is rotated, and water is fed under pressure to a water feed pipe through a discharging port 24. At this time, a blower impeller 55 is also rotated by the motor 10, and suction air from an intake port 46 is fed from the blowing port 39 to the blower pipe. When the motor 10 is driven in a condition in which water is not fed to the water feed pump 20, suction air from the intake port 46 is fed from the air blowing port 39 to the blower pipe by rotation of the blower impeller 55 in the blower chamber 40 formed on the recessed part of first and second air blower casings 31, 41. At this time, the pump impeller is idly rotated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric pump and a dishwasher, and more particularly, to an electric pump having a water supply function and a blower function, and a dishwasher using the electric pump. is there.

[0002]

2. Description of the Related Art For example, in a dishwasher, generally, dishes are stored in a washing tank, a predetermined amount of washing water is supplied from a tap water, and heated to a desired temperature by a heater provided in the washing tank. The washing water is pressure-fed by an electric water pump and jetted from a jet nozzle provided in the washing tank to wash dishes. Then, the process of washing the tableware by repeatedly feeding the washing water accumulated in the lower portion of the washing tank to the jet nozzle by the electric water pump is repeated.

After a certain period of time, the electric water supply pump is stopped and an electric drainage pump provided separately is driven to drain the dirty cleaning water in the cleaning tank. Water is supplied, and washing water is sprayed on the tableware that has been washed as described above to rinse it.
Such rinsing is repeated several times, and after a certain period of time, the electric water supply pump is stopped and the electric drainage pump is driven to discharge the cleaning water in the cleaning tank.

When the drainage is finished, the electric drainage pump is stopped and air is blown into the washing tank by an electric blower provided separately, and this air becomes warm air by the heater to dry the dishes in the washing tank. To do.

[0005]

As described above, the conventional dishwasher is usually equipped with the electric water pump, the electric drainage pump, and the electric blower. For this reason, the dishwasher itself becomes large and the installation place is restricted, and
It was expensive and hard to spread.

[0006] The present invention has been made to solve the above-mentioned problems, and by providing both the function of supplying water and the function of supplying air by one unit, it is possible to reduce the size and cost of electric equipment using the same. The purpose is to obtain an electric pump that can be used. Another object of the present invention is to obtain a small and low-priced dishwasher by using the above electric pump.

[0007]

[Means for Solving the Problems]

(1) In the electric pump according to the present invention, a blower chamber having a blower impeller and a pump chamber having a pump impeller are provided in proximity to the output side of the motor, and the blower impeller and the pump impeller are provided on the output shaft of the motor. They are attached respectively.

(2) In the electric pump of the above (1), the blower chamber is provided adjacent to the motor, and the intake port is provided on the motor side of the blower chamber and the blower port is provided laterally. (3) In the electric pump of (1) above, the pump chamber is provided adjacent to the blower chamber, the water inlet is provided on the opposite side of the pump chamber from the motor, and the outlet is provided laterally.

(4) Further, the electric pump according to the present invention has a motor, an intake port provided on the motor side, and a second portion fixed to the motor, which has a recess communicating with the intake port.
Of the blower casing, a recessed portion facing the recessed portion of the second blower casing, and a first blower casing having a blower port provided on the side and communicating with the recessed portion, by the recessed portions of the first and second blower casings. A blower comprising a blower impeller mounted in the formed blower chamber and attached to the output shaft of the motor, a pump impeller attached to the output shaft of the motor close to the blower, and the pump impeller And a water feed pump comprising a pump casing communicating with the pump chamber and provided with a water supply port on the opposite side of the motor and a discharge port provided on the side.
The blower casing and the pump casing are integrally fixed.

(5) Further, the dishwasher according to the present invention has a main body having a cleaning tank, a water supply pump provided in the main body for pumping the cleaning water stored in the cleaning tank, and an injection nozzle. In a dishwasher including a water supply pipe provided in a cleaning tank and connected to a water pump, and a blower or the like provided in the main body for sending air into the cleaning tank, the water pump and the blower are provided with the above (1). , (2), (3) or (4)
The electric motor is used.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a front view of a first embodiment of the present invention,
2 is a partial cross-sectional view thereof, and FIG. 3 is an exploded cross-sectional view of a main part of FIG. In the figure, 1 is an electric pump according to the present invention,
10 is a motor, 20 is a water pump, and 30 is a blower. In the motor 10, reference numeral 11 denotes an output shaft of the motor 10. A male screw 12 is provided at the tip of the output shaft 11, and an extension shaft 13 having a screw hole 14 at the center is screwed and fixed integrally. (Hereinafter, the output shaft 11 and the extension shaft 13 are collectively referred to as the output shaft 11). Reference numeral 15 is a cooling fan for cooling the motor 10, and 16 is a bracket for attaching the motor 10 to a dishwasher or the like.

In the water feed pump 20, reference numeral 21 denotes a pump casing forming a pump chamber 22. As shown in FIGS. 3 and 4, the pump chamber 2 is provided on the output shaft side opposite to the motor 10.
A water suction port 23 communicating with 2 is provided, and a discharge port 24 is provided on the side. 25 is a pump casing 2
2 is a plurality of screw seats each having a screw insertion hole 26 provided in 1. Reference numeral 27 denotes a pump impeller arranged in the pump chamber 22, which has a plurality of blades 28 and has a through hole 29 provided at the center thereof.
Thus, the motor 10 is mounted on the output shaft 11 so as to be detachable and non-rotatable.

In the blower 30, reference numeral 31 is a first blower casing, which is formed in a substantially U-shaped cross section by a recess 32 forming a part of the blower chamber 40, and a through hole 35 is formed in the center of the side plate 33. The recessed portion 34 is formed, and a ring-shaped fitting portion 36 into which the end portion of the pump casing 21 is fitted is provided on the outer peripheral side of the side plate 33. 3
7 has a screw insertion hole 38, and the first blower casing 31
Is a screw seat provided corresponding to the screw seat 25 of the pump casing 21 on the outer periphery of the. Reference numeral 39 is a blower opening that is provided substantially orthogonal to the side wall 33 and opens into the recess 32.

Reference numeral 41 is a second blower casing which forms a blower chamber 40 together with the first blower casing 31, and the blower chamber 4
0 has a concave portion 42 forming a part thereof, and a cover portion 43 for covering the periphery of the base portion of the output shaft 11 of the motor 10 is provided in the central portion on the motor 10 side. 44 is a screw insertion hole 4
5 is a plurality of mounting portions for mounting the second blower casing 41 to the motor 10 with screws 60, and an intake port 46 is provided around the cover portion 43. 47
Are a plurality of straightening vanes provided in the intake port 46. 48
Is a screw seat which has a screw hole 49 and is provided on the outer periphery of the second blower casing 41 so as to correspond to the screw seat 37 of the first blower casing 31. In addition, 50 is a recessed part fitted into the blower opening 39 of the first blower casing 31, and 51 is a stepped part with which the end of the first blower casing 31 is engaged.

55 is the first and second blower casings 31,
In the blower impeller housed in the blower chamber 40 formed by the recesses 32 and 42 of 41, as shown in FIG. 5, the arm 57 extending from the boss 56 provided in the recess at the center has A plurality of blower blades 58 are provided, a through hole 59 is provided in the center of the boss 56, and the boss 56 is non-rotatably press-fitted into the output shaft 12 of the motor 10.

Next, an example of the assembling procedure of the present embodiment configured as described above will be described. (1) The second blower casing 41 is fitted into the output shaft 11 of the motor 10, the base portion of the output shaft 11 is covered by the cover portion 43, and then the screw insertion hole 4 of each mounting portion 44 is inserted.
The screw 60 is inserted through the screw 5, and is screwed into a screw hole (not shown) provided in the motor 10 to fix the second blower casing 41 to the motor 10.

(2) The through hole 59 of the blower impeller 55 is press-fitted into the output shaft 11 of the motor 10 so that it cannot be rotated. (3) The female screw 14 of the extension shaft 13 is screwed into and fixed to the male screw 12 provided on the output shaft 11 of the motor 10.

(4) The through hole 35 of the first blower casing 31 is fitted into the output shaft 11 of the motor 10 so that its screw seat 37 is aligned with the screw seat 48 of the second blower casing 41, and its end. The portion is locked to the step portion 51 of the second blower casing 41. Then, the output shaft 1 of the motor 10
1 is fitted with the sealing material 63, and the first blower casing 31
Located in the recess 34 of the.

(5) The through hole 29 of the pump impeller 27 is non-rotatably and detachably fitted into the output shaft 11 of the motor 10, and the screw 61 is fitted into the screw hole 14 provided in the output shaft 11 (extension shaft 13). Screw in and fix. (6) The pump casing 21 is brought into contact with the first blower casing 31, and the end portion of the pump casing 21 is brought into contact with the first casing via the O-ring 64.
While being fitted to the fitting portion 36 of the blower casing 31 of
Each screw seat 25 is replaced with a screw seat 37 of the first blower casing 31.
To match.

(7) The screw 62 is inserted into the screw insertion holes 26 and 38 of the screw seats 25 and 37 of the pump casing 21 and the first blower casing 31, and the screw hole of the screw seat 48 of the second blower casing 41. It is screwed into 49 and the pump casing 25 and the first and second blower casings 31 and 41 are integrally connected. At this time, the pump impeller 27 is in the pump chamber 22, and the blower impeller 55 is in the first and second blower casings 3.
It is held in the blower chamber 40 formed by the concave portions 32, 42 of 1, 41.

Next, the operation of the present invention configured as described above will be described. First, a water supply pipe (not shown) is connected to the water suction port 23 of the water supply pump 20, and a water supply pipe (not shown) is connected to the discharge port 24. Further, a blower pipe (not shown) is connected to the blower opening 39 of the blower 30. When the motor 10 is driven while water is being supplied from the water supply pipe to the pump chamber 22, the pump impeller 27 fixed to the output shaft 11 rotates, and water from the water supply pipe is discharged through the discharge port 24. Pump to the water pipe. At this time, the blower impeller 55 is also driven by the motor 10 to rotate, and the air sucked from the intake port 46 receives the air from the blower port 3.
It is sent from 9 to the blower pipe.

Further, when the motor 10 is driven in a state where the water is not supplied from the water supply pipe to the water supply pump 20, the air sucked from the intake port 46 by the rotation of the air blow impeller 55 is sent from the air blow port 39 to the air blow pipe. . At this time, the pump impeller 27 is idling.

Embodiment 2 FIG. Next, an embodiment in which the electric pump according to the present invention is used in a dishwasher will be described with reference to FIGS. 6 and 7. In both figures, 71 is a box-shaped main body having an opening from the front surface to the upper surface, 72 is an upper door that is openably and closably attached to the opening of the main body 71 via a hinge, and 73 is also a lower door. A cleaning tank 74 is formed in the main body 1 and has an opening from the front surface to the upper surface. A water tank 75 having a concave shape and smaller than the cleaning tank 74 is formed in the lower portion thereof.

Reference numerals 76a and 76b denote side walls of the cleaning tank 74. Spaces are formed between the side walls 76a and 76b and the side wall of the main body 71 and between the bottom of the water storage tank 75 and the bottom plate of the main body 71, respectively. ing. Reference numeral 77 is a heater installed in the water storage tank 75, and 78 is, for example, a wire net having a large number of small holes, punching metal, etc.
9 is a filter which is inclined downwardly toward 9 and is detachably arranged so as to cover the entire surface of the water storage tank 75, and a dish-shaped leftover filter (not shown) is detachably attached to the opening 79. ing. Reference numeral 80 denotes a rear wall of the main body 71 and a lower portion of a corner portion of one side wall, which is a substantially rectangular flat concave portion that opens to the rear wall and the side wall. The concave portion 80 has one end open to the lower portion of the cleaning tank 74. A water supply pipe 81 is rotatably provided. A water supply valve 82 opens and closes the wash water supply pipe 81.

1 is an electric pump according to the present invention, which is a water tank 7
5 and the rear wall of the main body 71 are installed in a space portion 83a. Reference numeral 85 denotes a first water supply pipe connecting the water supply port 84 of the water storage tank 75 and the water intake port 23 of the water supply pump 20 of the electric pump 1, and 86 has one end attached to the side wall of the water storage tank 75 and connected to a water supply pipe 93 described later. The second water pipe is connected and the other end is connected to the discharge port 24 of the water pump 20. 8
A drain pipe 7 is connected to the second water supply pipe 86 via the drain valve 88, and a drain valve controller 89 controls opening / closing of the drain valve 88.

Reference numeral 90 denotes a blower pipe whose one end is connected to the blower port 39 of the blower 30 of the electric pump 1. The blower pipe extends below the water tank 75 to the vicinity of the front wall of the main body 1 and is then bent upward for cleaning. It rises along the side wall 76a of the tank 74, extends above the liquid level L of the washing water in the water tank 75 at the time of water supply, and is then bent into a substantially inverted U shape, and the other end is the side wall of the water tank 75. 7
6a is connected to an opening 91 provided at the lower part on the front side of 6a and opens in the water tank 75. A control unit 92 is installed in a space 83b formed between the water tank 75 and the front wall of the main body 71 and is operated by an operation panel (not shown) provided on the front surface of the main body 71.

93 is installed in the lower part of the cleaning tank 74, and the second
The water supply pipe 94, which is connected to the water supply pipe 86, branches from the second water supply pipe 86, extends upward along the side wall 76a of the cleaning tank 74, and opens into the cleaning tank 74 at the upper part of the side wall 76a. It is a side water supply pipe. Reference numeral 95 is a discharge port attached to the tip of the side water supply pipe 94, and 96 is an injection nozzle rotatably mounted on the discharge port 95, which is formed into a substantially disk shape by the bottom plate and the hemispherical surface portion. Is provided with slit-shaped injection ports 97a and 97b. Although not shown in the drawing, the hemispherical surface portion is provided with a jet of cleaning water in close proximity to and opposite to the bottom plate, and the jet nozzle 96 rotates by the reaction of the washing water jetted from this jet port. .

Further, the water supply pipe 93 is provided with a plurality of discharge ports in the longitudinal direction thereof, and spray nozzles (not shown) having substantially the same structure as the spray nozzle 96 are rotatably provided at these discharge ports. It is installed. Reference numeral 98 is a tableware basket that can be put in and taken out of the cleaning tank 74, and 99 is a tableware basket 9
Tableware such as bowls, plates, bowls, and cups housed in No. 8.

Next, the operation of the dishwasher configured as described above will be described. The wash water supply pipe 81 is connected to the tap of the water supply through a hose, and the end of the hose connected to the drain pipe 87 is located near the drain port of the sink, for example, and the tableware 99 is accommodated. The tableware basket 98 thus prepared is stored in the cleaning tank 74, and the upper door 72 and the lower door 73 are closed.

(1) First, the power is turned on, the water supply valve 82 of the cleaning water supply pipe 81 is opened to supply the cleaning water into the water tank 75, and when the desired cleaning water is stored, the water level sensor (Fig. The water level is detected by (not shown), and the water supply valve 82 is closed. In this state, the cleaning water is stored in the water storage tank 75, the first water supply pipe 85, the pump chamber 22 of the water supply pump 20, the second water supply pipe 86, and a part of the blower pipe 90. Since the blower pipe 90 is bent above the liquid level L of the wash water in the water storage tank 75, there is no possibility that the wash water will flow into the blower chamber 32 of the blower 30.

(2) Next, the heater 77 is energized to raise the temperature of the wash water in the water storage tank 75 to a desired temperature. Then
The motor 10 of the electric pump 1 is energized to drive the pump impeller 27 of the water feed pump 20, and by the pumping force generated by the rotation of the pump impeller 27, the warmed wash water in the water storage tank 75 is supplied to the first The water supply pipe 85 and the second water supply pipe 86 pressure-feed the water supply pipe 93 and the side water supply pipe 94. As a result, the spray nozzles 96 provided in the respective spray nozzles spray the cleaning water from the spray ports 97a and 97b while rotating to start cleaning the dishes 99.

(3) The washing water sprayed toward the dishes 99 hits the dishes 99, the inner wall of the washing tank 74, the upper door 72 and the like, and falls and is again stored in the water tank 75. Then, the water supply pump 20 pressure-feeds the second water supply pipe 86 to the water supply pipe 93 and the side water supply pipe 94, and the injection nozzle 96.
It is injected from and repeats this circulation.

When the desired time has passed, the heater 77 and the electric pump 1 are de-energized, and then the drain valve controller 89 opens the drain valve 88. Thereby, in the water tank 75, the pump chamber 22, the first and second water pipes 85,
The waste water in 86 and the blower pipe 90 is discharged from the drain pipe 87 through the hose to the outside through the drain port of the sink. The drainage process may be natural drainage, or the water pump 20 may be driven to automatically drain the water.

When all the waste water has been drained, the drain valve 87 is closed and the water supply valve 82 is opened to supply new wash water to the water storage tank 75. After that, the dishes 99 are rinsed by the same process as the above-described cleaning process, and drained again when the rinse for a desired time is completed. This rinsing and drainage are usually repeated several times. If the heater 77 is energized and warm water is used during rinsing, the rinsing effect can be enhanced. Note that the blower 30 of the electric pump 1 also operates during the above-described washing step and rinsing step, but since the blowing force is weak, it has little effect on the washing water in the blower tube 90.

After rinsing and draining the desired number of times, the heater 77 and the electric pump 1 are energized with the water supply valve 82 of the wash water supply pipe 81 closed, and the blower impeller 55 is driven to drive the air from the ventilation pipe 90. Air is sent into the cleaning tank 74. This air is heated by the heater 77 to become warm air, and the tableware 99
Then, the process of drying the entire area of the cleaning tank 74 is started. The hot air is the main body 7
The heat is released to the outside from a heat radiation port (not shown) provided on the upper surface of 1. During the drying process, the pump impeller 27 of the water feed pump 20 also runs idle, but this does not adversely affect the electric pump 1.

When the desired time has elapsed, the heater 77 and the electric pump 1 are de-energized and the drying process is completed, whereby all the dishwashing and drying processes are completed. When the tableware 99 has cooled, the upper door 72 and the lower door 73 are opened to take out the tableware 99, and the residual food filter is taken out to discard the residual foods accumulated. If necessary, the filter 78 is taken out and washed to wash away the attached residual food.

In the above description, the case where the electric pump according to the present invention is used in the dishwasher shown in FIGS. 6 and 7 is shown, but the dishwasher having another structure, and further other electric equipments. Can also be used for

[0038]

As is apparent from the above description, the electric pump according to the present invention can obtain the following effects. (1) A blower chamber having a blower impeller and a pump chamber having a pump impeller are provided close to each other on the output side of the motor, and the blower impeller and the pump impeller are attached to the output shaft of the motor to form one electric machine. Since the pump has both the function of supplying water and the function of supplying air, the water supply pump and the air blower can be simplified and downsized, and the cost can be reduced. Further, it is possible to achieve downsizing of electric equipment and cost reduction using the same.

(2) In the electric pump of the above (1), the air blowing chamber is provided adjacent to the motor, the air inlet is provided on the motor side of the air blowing chamber, and the air blowing port is provided laterally.
The blower chamber can be downsized, and the blower pipes can be connected easily and reliably.

(3) In the electric pump of the above (1), since the pump chamber is provided adjacent to the blower chamber, the water suction port is provided on the opposite side of the pump chamber from the motor, and the discharge port is provided on the side. The pump chamber can be downsized, and the water suction pipe and the water supply pipe can be connected easily and reliably.

(4) Further, the electric pump according to the present invention has a motor, an intake port provided on the motor side, and a second portion fixed to the motor having a recess communicating with the intake port.
Formed by a concave portion of the first and second blower casings, a first blower casing having a concave portion facing the concave portion of the second casing, and a blower opening provided on the side and communicating with the concave portion. And a pump impeller attached to the output shaft of the motor in the vicinity of the blower, and the pump impeller. A pump chamber and a water pump that is in communication with the pump chamber and that has a water suction port on the opposite side of the motor and a discharge casing on the lateral side, and a second and a first blower casing and a pump casing. Since it is fixed integrally, not only the electric pump can be downsized, but also manufacturing, assembling and adjustment are easy, productivity is improved, and cost can be reduced.

(5) Further, in the dishwasher according to the present invention, the above-mentioned (1), (2), (3) or (4) is used in the water pump for pumping the wash water and the blower for sending the air into the washing tank. Since the electric pump is used, the dishwasher can be downsized, so that the degree of freedom of the installation place can be increased and the price can be reduced. Moreover, since the water pump can be used when draining the wash water as needed, a highly efficient and easy-to-use dishwasher can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of FIG.

FIG. 3 is an exploded view of the water pump and the blower of FIG.

FIG. 4 is a sectional view of a water pump.

FIG. 5 is a cross-sectional view of a blower.

FIG. 6 is a vertical sectional view showing a dishwasher according to a second embodiment of the present invention.

7 is a cross-sectional view taken along the line AA of the door of FIG. 6 being opened.

[Explanation of symbols]

1 electric pump, 10 motor, 20 water pump, 2
1 pump casing, 22 pump chamber, 23 suction port, 24 discharge port, 27 pump impeller, 30 blower,
31 1st ventilation casing, 32 recessed part, 39 ventilation port, 40 ventilation chamber, 41 2nd ventilation casing, 42
Recess, 46 intake port, 55 blower impeller, 71 dishwasher body, 74 washing tank, 75 water tank, 77 heater, 81 washing water supply pipe, 85 first water feeding pipe, 86
Second water pipe, 87 Drain pipe, 90 Blower pipe, 93
Water pipe, 96 injection nozzle.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Katsuhiko Ishii 1728 Omaeda, Omaeda, Hanazono-cho, Oza-gun, Saitama 1 Mitsubishi Electric Home Equipment Co., Ltd.

Claims (5)

[Claims] 1. A blower chamber having a blower impeller and a pump chamber having a pump impeller are provided close to each other on an output side of a motor, and the blower impeller and the pump impeller are attached to an output shaft of the motor, respectively. An electric pump characterized by. 2. The electric pump according to claim 1, wherein a blower chamber is provided adjacent to the motor, an intake port is provided on the motor side of the blower chamber, and a blower port is provided laterally. 3. The electric motor according to claim 1, wherein a pump chamber is provided adjacent to the blower chamber, a water suction port is provided on the opposite side of the pump chamber from the motor, and a discharge port is provided on the side. pump. 4. A motor, a second blower casing fixed to the motor, having a suction port provided on the motor side and a recess communicating with the suction port, and facing the recess of the second blower casing. And a first blower casing provided on the side and having a blower opening communicating with the recess, and an output shaft of the motor arranged in a blower chamber formed by the recesses of the first and second blower casings. A blower comprising a blower impeller attached to the pump, a pump impeller attached to the output shaft of the motor in the vicinity of the blower, a pump chamber in which the pump impeller is disposed, and a pump chamber communicating with the pump chamber. A water feed pump comprising a pump casing having a water suction port on the opposite side of the motor and a discharge port on the lateral side, and integrally fixing the second and first blower casings and the pump casing. An electric pump characterized by the above. 5. A main body having a cleaning tank, a water supply pump provided in the main body for pumping the cleaning water stored in the cleaning tank, and an injection nozzle provided in the cleaning tank to supply the water. A dishwasher comprising a water supply pipe connected to a pump and a blower or the like provided in the main body for sending air into the washing tank, wherein the water feed pump and the blower have the following features:
A dishwasher using the described electric pump.