JPH04244126A - Washing machine for flatware - Google Patents

Abstract

PURPOSE:To make the title machine sanitarily desirable, by a method wherein washing water circulated for the title machine is not brought into direct contact with service water. CONSTITUTION:A water supply nozzle 59 is located at the top part in a washing tank 4 and service water is dropped. The inside of an upper spraying nozzle 23 is separated into a washing water-path and a rinsing water-path, and a water-receiving pipe 58 is vertically formed in the upper spraying nozzle 23 and receives water falling through the water supply nozzle 59. This water is led into the rinsing water-path, and is sprayed through rinsing jets 25, and finally is stored in a drainage holder 8. In the time of washing, this washing water stored is sent to the upper spraying nozzle 23 and a lower spraying nozzle 17 by a washing pump 16. The washing water is sprayed through washing jets 24, 18 and flatware 21 in upper and lower flatware baskets 27, 20 are washed. In the time of rinsing, it is in the same movement as in the time of water supply.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher that sprays washing water onto tableware stored in its main body.

0002

[Prior Art] FIGS. 9 and 10 show, for example, Japanese Patent Application No. 2-1
22130 and the drawings, FIG. 9 is a partially cutaway front view, and FIG. 10 is a longitudinal side view. In the figure, (1) is the main body of the dishwasher, with an opening (2) on the front and a door (3) that opens and closes it.
is provided. (4) is a cleaning tank provided to partition the inside of the main body (1) and communicates with the opening (2); (5)
is a steam vent hole drilled in the upper plate (6) of the cleaning tank (4), (7) is an intake hole drilled in the lower side wall of the cleaning tank (4), and (8) is a steam vent hole drilled in the upper plate (6) of the cleaning tank (4). It is a drainage basin provided at the bottom of the drain basin, which is formed in the shape of a dish with a concave leftover receptacle (9) on one side of the bottom, and a drain filter (10) is removably provided. (11) is a cleaning filter installed in the drainage basin (8), which is arranged at an angle so as to partition one side of the drainage basin (8), and between the side wall of the drainage basin (8) and the filter chamber (12). It consists of (13) faces the cleaning filter (11) at a distance, and the water channel (14)
(15) is an electric heater placed around the periphery of the filtration chamber (12), (16) is a cleaning pump connected to the filtration chamber (12), and (17) is rotatable in a horizontal plane. The provided rod-shaped lower injection nozzle has multiple injection ports (18
) and is connected to the cleaning pump (16) by a water pipe (19). (20) is a lower tableware basket placed above the lower injection nozzle (19) and for storing tableware (21);
It is placed on a receiving part (22) provided on the side wall of the cleaning tank (4).

(23) is a rod-shaped upper spray nozzle that is arranged above the lower dish basket (20) and has a washing channel and a rinsing channel that are separated from each other, and is rotatably provided in a horizontal plane; Cleaning injection port (24) communicating with the cleaning waterway
and a plurality of rinsing injection ports (25) communicating with the rinsing waterway. (26) is a water pipe that communicates with the washing pump (16) and the washing channel of the upper injection nozzle (23);
7) is arranged above the upper injection nozzle (23) and the tableware (
21), which is placed on the receiving part (22). (28) is a drain pipe connected to the leftovers receiver (9) via a drain pump (29), and (30) is connected at one end to a water supply (not shown) and at the other end via a solenoid valve (31). (32) is a drying heater installed between the inner wall of the main body (1) and the cleaning tank (4), and (33) is a motor (34).
(35) is an outlet side temperature sensor placed in the steam vent hole (5) to detect the temperature of the steam discharged from the cleaning tank (4), (36) is placed in the intake hole (7) (37) is an inlet-side temperature sensor that detects the temperature of hot air from the drying heater (32); (37) is a detergent dispenser box that stores detergent and opens at the bottom to dispense detergent during a predetermined process;
8) is an intake port provided at the top of the main body (1), (39)
Similarly, (40) is an exhaust port, and (40) is a drying end light provided on the door (3).

[0004] A conventional dishwasher is constructed as described above, and the door (3) is opened and the upper and lower dishwashers (27) (20
) and put the tableware (21) into the tableware basket (27) (2
0), close the door (3) and close the solenoid valve (31).
), the tap water will flow through the water supply pipe (30).
through the rinse jet (25) of the upper jet nozzle (23)
It gushes out and falls, and is stored in the drainage basin (8). Next, when the cleaning pump (16) is operated, the drainage pool (8)
The cleaning water passes through the water pipe (26) and reaches the upper injection nozzle (23).
), and is also sent to the lower injection nozzle (17) through the water pipe (19), and is injected from the cleaning injection port (24) and the injection port (18), respectively. and,
Upper and lower injection nozzles (23) (17) with their injection power
rotates and pre-washes the dishes.

[0005] When the pre-washing is completed, the drain pump (29)
is activated, and the water in the drainage basin (8) is discharged to the outside through the drainage pipe (28). At this time, the leftovers washed away from the tableware (21) adhere to the cleaning filter (11) while the cleaning pump (16) is in operation, but when moving to the draining process, the leftovers are deposited on the leftovers receiver (9). Move and drain filter (10)
It is supplemented by. Next, water is supplied through the water supply pipe (30), detergent is introduced from the detergent input box (37), and the cleaning pump (16) is operated to perform cleaning. In this case, in order to increase cleaning efficiency, the electric heater (15) is turned on/off.
It is turned off to raise and maintain the water temperature. Then, the drain pump (29) is further operated to drain the water.

Next, water is supplied from the water supply pipe (30), and the washing water is circulated again by the washing pump (16) to wash the tableware (2).
1) Rinse and drain after circulating for a predetermined period of time. This process is repeated several times to form a rinsing process. When this process is completed, the water supplied from the water supply pipe (30) is rinsed and
5) and drain the water for the final rinsing step. Finally, in the drying process, the blower (33) and the drying heater (32) are operated, and outside air is sucked in through the intake port (38), and after being heated by the drying heater (32), the air is heated through the intake hole (7).
into the cleaning tank (4). This steams the water from the wet tableware (21) in the final rinsing step, and this steam is discharged to the outside through the steam vent hole (5) and the exhaust port (39). Then, the inlet side temperature sensor (36) and the outlet side temperature sensor (35) detect the temperature of the intake hole (7) and the steam vent hole (5), respectively, and when the difference in these detected temperatures is small and constant. , the drying is completed, and the drying end light (
40) lights up, and the blower (33) and drying heater (32) stop. After this, open the door (3), take out the tableware (21), and then install the drain filter (10).
Throw away any leftover food, clean it, and then set the drainage filter (10).

[0007]

[Problems to be Solved by the Invention] In the conventional dishwasher as described above, the upper injection nozzle (23) has a water supply pipe (30).
) and a water pipe (26) are connected, and the tap water and circulating water are close to each other, so there is a problem that dirty circulating water may mix into the tap water, which is undesirable from a sanitary standpoint.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a dishwasher that can prevent dirty circulating water from entering tap water.

[0009]

[Means for Solving the Problems] A dishwasher according to a first aspect of the present invention has a water supply port of a water supply nozzle disposed in the ceiling of a washing tank, and the inside of a spray nozzle for washing dishes is used as a washing channel and a rinsing channel. Separated into water channels, a water receiving pipe opening toward the water supply port is erected on the upper surface of this injection nozzle, and this is communicated with the rinsing circuit of the injection nozzle.

[0010] Furthermore, in the dishwasher according to the second invention, in the dishwasher according to the first invention, the dishwasher basket and the injection nozzle are combined, the end of the water pipe is arranged on the side wall of the washing tank, and the injection nozzle is connected to the injection nozzle. A connecting pipe communicating with the washing channel is provided, and the connecting pipe is detachably attached to the end of the water pipe.

[0011] Furthermore, a dishwasher according to a third aspect of the invention is one in which, in the dishwasher of the first or second aspect, the water channel near the water supply port of the water supply nozzle is curved downward from horizontal.

[0012] Furthermore, the dishwasher according to the fourth invention is the dishwasher according to the first or second invention, in which a conical tubular part that expands from the inlet to the outlet is formed in the water receiving pipe of the injection nozzle. It is.

[0013]

[Operation] In the first aspect of the present invention, a water supply port is arranged in the ceiling of the cleaning tank, and a water receiving pipe that opens toward the water supply port is installed in the injection nozzle, and this is connected to the rinse channel of the injection nozzle. Because they are connected, tap water falls from the water supply port, is received by the water receiving pipe, and enters the rinsing channel.

In addition, in the second invention, the dish basket and the spray nozzle are connected, and a connecting pipe communicating with the washing water channel is provided, and this is made detachable from the water pipe end of the side wall of the washing tank. The distance between the top of the water pipe and the water supply port can be shortened.

Furthermore, in the third aspect of the invention, since the water channel near the water supply port of the water supply nozzle is curved, turbulence does not occur in the water flow.

[0016] Furthermore, in the fourth invention, since the water receiving pipe of the injection nozzle is formed with a conical tubular portion that expands downward, the pressure loss of water is small.

[0017]

[Embodiment] Embodiment 1 Figures 1 to 5 are views showing an embodiment of the first, third and fourth aspects of the present invention, in which Figure 1 is a vertical side view and Figure 2 is a top injection nozzle A plan view, the third one is a front view, and the fourth one is I in Fig. 2.
5 is a sectional view taken along the line V-IV in FIG. 3, and the same parts as in the conventional device are designated by the same reference numerals.

In the figure, (51) has one end connected to the water pipe (2).
6), the other end of which extends to the center of the upper injection nozzle (23); (52) is the main body of the upper injection nozzle (23); ) and a rinsing channel (55), the washing channel (54) communicates with the cleaning injection port (24), and the rinse channel (55) communicates with the rinsing injection port (25). (56) is a central hole that opens in the center of the nozzle body (52) and communicates with the rinse channel (55), and (57) opens around the center hole (56) and communicates with the wash channel (54). The cleaning hole (58) is a water receiving pipe that is fixed to the nozzle body (52) and communicates with the center hole (56), and is connected to the connecting pipe (51) via a retaining ring (59). It is arranged below the bottom of the tableware basket (27). Further, the inside of the connecting pipe (51) communicates with the cleaning hole (57). The water receiving pipe (58) has an inner diameter of d
It consists of a conical expanding tube (58a) that expands from the inlet to the outlet (lower part), and a receiving tube (58b) that expands upward from the inlet. Water supply pipe (30
) is piped to the top of the cleaning tank (4), and the water supply nozzle (59) at its tip is bent downward from the horizontal and fixed to the cleaning tank (4) with a nut (60), and the water supply nozzle (59) The water supply port opens downward in the ceiling of the cleaning tank (4) and is arranged directly above the water receiving pipe (58). Here, if the inner diameter of the water supply nozzle (59) is d0, then the water receiving pipe (
The inlet inner diameter d1 of the water supply nozzle (58) is the inner diameter d0 of the water supply nozzle (59).
is selected to be less than twice that of the previous year.

In the dishwasher constructed as described above, when the solenoid valve (31) is operated, tap water passes through the water supply pipe (30) and falls from the water supply nozzle (59). At this time, since the water channel of the water supply nozzle (59) is curved, the water flow is less turbulent than one bent at right angles, and falls in a rod shape. This water stream is received by the water receiving pipe (58) of the upper injection nozzle (23) and introduced into the rinse channel (55). At this time, the expansion pipe (58a) of the water receiving pipe (58)
Due to this effect, water pressure loss is small. Furthermore, the inlet inner diameter d1 of the water receiving pipe (58) is adjusted to the water supply nozzle (5
Efficiency can be increased by selecting the inner diameter d0 of 9) to be twice or less. In other words, when these are not carried out, the water flow rate must be 12 l/mi to satisfy the cleaning function.
n or more was required, but in the case of the implementation, it was 7l/min.
It got better. The water introduced into the rinsing channel (55) is injected from the rinsing jet (25), and the jet flow is high because the pressure loss of the water is small as described above. Then, the tableware (21) in the upper tableware basket (27) falls while being washed, and the tableware (21) in the lower tableware basket (20) is washed and stored in the drainage basin (8). This operation is similar during rinsing. In addition, during cleaning, the cleaning water that has passed through the water pipe (26) and the connecting pipe (51) flows through the upper injection nozzle body (
is introduced into the cleaning channel (54) of the cleaning jet (2).
Cleaning by spraying from 4) is the same as in the case described above.

FIGS. 6 to 8 are views showing embodiments of the second to fourth aspects of the present invention, with FIG. 6 being a vertical sectional side view of the main part, and FIG.
8 is an enlarged side view of the main part of the upper tableware basket, and FIG. 8 is an enlarged front view of the main part. In the figure, (65) is the upper tableware basket (27
), and the connecting pipe (51) is fastened to the support (65) with a screw (67) via a fastener (66). An elastic connecting part (68) is formed at the end of the connecting pipe (51), and can be freely attached to and detached from the water pipe (26) opening in the side wall of the cleaning tank (4). In addition,
The water receiving pipe (58) passes through the dish basket (27), projects upward, and faces the water supply port of the water supply nozzle (59).

That is, the water receiving pipe (58) is connected to the connecting pipe (51).
) to the upper injection nozzle (23), and these three move together as the upper dish basket (27) is put in and taken out, and the connecting part (68) of the connecting pipe (51) It is attached to and detached from the water pipe (26). Therefore, the distance between the top of the water receiving pipe (58) and the water supply port of the water supply nozzle (59) can be shortened, the positioning error between the two is reduced, and water reception is facilitated.

[0022]

[Effects of the Invention] As explained above, in the first aspect of the present invention, a water supply port is arranged in the ceiling of the cleaning tank, and a water receiving pipe that opens toward the water supply port is installed in the injection nozzle, and the Since the nozzle is connected to the rinsing channel, the tap water falls from the water supply inlet, is received by the water receiving pipe, and enters the rinsing channel, preventing dirty circulating water from getting mixed into the tap water and preventing sanitary problems. There are effects that can be eliminated.

In addition, in the second invention, the dish basket and the spray nozzle are connected, and a connecting pipe communicating with the washing water channel is provided, and this is made detachable from the water pipe end of the side wall of the washing tank. The distance between the top of the water pipe and the water supply port can be shortened, and the positional error between the two is reduced, making it easier to receive water and ensuring a uniform jet stream.

Furthermore, in the third invention, since the water channel near the water supply port of the water supply nozzle is curved, turbulence does not occur in the water flow.
This has the effect of making it easier for water to enter the water receiving pipe.

[0025] Furthermore, in the fourth invention, since a conical tubular portion that expands downward is formed in the water receiving pipe of the injection nozzle, the pressure loss of water can be reduced and the jet flow from the injection port can be made sufficiently high. There is an effect that can be done.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing an embodiment of a dishwasher according to first, third, and fourth aspects of the present invention.

FIG. 2 is a plan view of the upper injection nozzle in FIG. 1;

FIG. 3 is a front view of FIG. 2.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is a sectional view taken along the line V-V in FIG. 3;

FIG. 6 is a longitudinal sectional side view of a main part showing an embodiment of the second to fourth aspects of the present invention.

FIG. 7 is an enlarged cross-sectional view of the main part of the upper tableware basket portion of FIG. 6;

FIG. 8 is a front view of the main parts of Rui 7.

FIG. 9 is a partially cutaway front view showing a conventional dishwasher.

FIG. 10 is a longitudinal side view of FIG. 9;

[Explanation of symbols]

4 Washing tank 8 Drainage basin 21 Tableware 23 Top injection nozzle 24 Cleaning injection port 25 Rinse injection port 26 Water pipe 27 Upper tableware basket 30 Water supply pipe 51 Connecting pipe 54 Washing channel 55 Rinse channel 58 Water receiving pipe 58a Enlargement tube 59 Water supply nozzle 68 Connection part

Claims (4)

[Claims] 1. A tableware basket installed in a washing tank for storing tableware, an injection nozzle arranged below the tableware basket, the interior of which is separated into a washing channel and a rinsing channel, each communicating with a spray port, and the above-mentioned. A drainage basin provided at the bottom of the cleaning tank, a water supply nozzle provided at the ceiling of the cleaning tank and having a downward water supply port, and a water supply pipe that sends cleaning water from the drainage basin to the cleaning channel of the injection nozzle. A dishwasher comprising: a water receiving pipe erected on the upper surface of the injection nozzle, communicating with the rinsing circuit in the injection nozzle and opening toward the water supply port. 2. A tableware basket and a spray nozzle are coupled to each other, an end of a water pipe is disposed on a side wall of the washing tank, and the water pipe is provided in the spray nozzle and communicates with the washing water channel in the spray nozzle. The dishwasher according to claim 1, further comprising a connecting pipe detachably formed at the end of the dishwasher. 3. The dishwasher according to claim 1, wherein the water channel near the water supply port of the water supply nozzle is curved downward from horizontal. [Claim 4] Claim 1 or Claim 2, wherein the water receiving pipe is formed with a conical tubular part that expands from the inlet to the outlet.
Dishwasher as described in.