JP3158690B2 - Dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher suitable for combination with existing hot water supply equipment.

[0002]

2. Description of the Related Art There is a well-known dishwasher in which dishes are placed in a washing tank and hot water is sprayed from a washing nozzle to wash the dishes. In a small dishwasher, tap water or the like is temporarily stored in a water reservoir at the bottom of the cleaning tank, boiled by an attached heater, then pumped up by a pump, and pressurized and jetted from a cleaning nozzle.

On the other hand, gas or electric hot water supply facilities are installed in each home. By using this hot water supply equipment for a dishwasher, there is a possibility that the heater on the dishwasher side can be reduced in size or omitted.

[0004]

However, since the hot water supply system is used for supplying water to a sink, a bathtub, a shower, etc. for a multi-purpose purpose, if the hot water supply is connected to a dishwasher, the hot water temperature is not determined and the pressure is low. Not determined. If hot water temperature is too high, cracked glass tableware, there is a risk that plastic tableware is deformed, also variable such as proteins if high temperature
Cleaning performance is low due to the enhanced properties and strong adhesion to tableware
Will be down. When the temperature of the hot water is low and it is heated with the attached heater
The length of time is longer and the use time of the dishwasher is longer. Also, if the pressure is too high, the injection of the nozzle becomes excessive, which may damage the tableware or cause the nozzle to be broken.
Not good. At the same time, if the pressure is high, the flow rate of hot water to the cleaning tank
Of the solenoid valve that supplies hot water to the washing tank.
In the event of a malfunction, the hot water is discharged out of the cleaning tank.
The hot water supply flow rate is greater than the discharge flow rate of the water means.
May cause serious damage such as flooding
You. If the pressure is too low, the time to store hot water in the water pool will be long
The use time of the dishwasher also becomes longer.

It is an object of the present invention to provide a dishwasher to which a multipurpose hot water supply facility whose temperature and pressure are not determined can be connected.

[0006]

SUMMARY OF THE INVENTION In order to meet the above demands, the present invention provides a hot water inlet for receiving hot water from a hot water supply facility, a water inlet for receiving water from a water pipe, and a hot water outlet for discharging hot water. A temperature control valve for mixing hot and cold water at an appropriate temperature, and a pressure control temperature control mechanism comprising a constant flow rate valve for making the mixed hot and cold water flow at a constant flow rate are mounted on the washing tank.
You.

[0007]

[Function] A multipurpose hot water supply system is connected to the hot water inlet, and a water pipe is connected to the hot water inlet. Even if the temperature and pressure of hot water from the hot-water supply equipment changes, and even if the pressure of tap water changes, the temperature and pressure control mechanism keeps the temperature and pressure constant. Hot water can be sprayed on the tableware.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front sectional view of a dishwasher according to the present invention. In the dishwasher 1, an upper basket 3, an upper washing nozzle 4, a lower basket 5, and a lower washing nozzle 6 are arranged inside a washing tank 2 from top to bottom. Then, a water reservoir 7 is formed in the lower portion of the cleaning tank 2, and hot water supplied from the bottom of the water reservoir 7 is pumped to the lower cleaning nozzle 6 via the first pump 8, and the second pump 9 and the circulation It faces above the upper washing nozzle 4 via the passage 10.

The end of the circulation path 10 is surrounded by the end of a water channel 11. This water channel 11 is a general water pipe 12,
This is a line for supplying tap water, that is, tap water, through the hot water supply facility 13 and the pressure control temperature control mechanism 30.

A rinsing tank 1 is provided on the upper surface of the cleaning tank 2.
6 is placed, and a fixed amount of rinse is dropped through a rinse tube 17 by the action of a metering pump and a valve built in the rinse tank 16.

In FIG. 1, reference numeral 18 denotes a water heater, 19 denotes an air heater, and 20 denotes a fan.

FIG. 2 is an enlarged view of a main part of FIG. 1. The hot water inlet of the upper cleaning nozzle 4 is a funnel 21.
The circulation path 10, the water path 11, and the rinsing tube 17 are arranged so as to face the funnel 21 from above. Further, the circulation path 10 is above the overflow surface 21a of the funnel 21
1. Water channel 11 is L2 and rinse tube 17 is L3
The feature is that they are only separated. L1 and L3 are almost the same, but L2 is set at least 25 mm larger than L1.

FIG. 3 is a block diagram of a pressure control temperature control mechanism of the present invention. The pressure control temperature control mechanism 30 has a casing 31 having a hot water inlet 32, a water inlet 33, and a hot water outlet 34 attached to the side surface thereof. A differential pressure governor 35, check valves 36 and 36, a temperature control valve 37, a constant flow valve 38 and a pipe 39 are housed therein.

The differential pressure governor 35 opens and closes an internal valve so as to approximate the pressure of hot water from the hot water supply facility to the pressure at a fixed ratio. Since tap water fluctuates greatly in pressure, it approximates the pressure of hot water which is relatively stable. When the pressure of hot water and water is maintained in a constant relationship, the next temperature control valve 37
Control accuracy is improved.

The temperature control valve 37 is a temperature control valve. When the temperature of hot water from the hot water supply equipment is higher than the set temperature, the amount of hot water is reduced, the amount of water is increased, and the temperature of the mixed hot water is lowered. When the temperature of the hot water is lower than the setting, the amount of the hot water is increased, the amount of the hot water is reduced, and the temperature of the mixed hot water is adjusted so as to increase.

The constant flow valve 38 adjusts the flow characteristic on the secondary side (outlet side) to a constant range even if the pressure on the primary side (inlet side) fluctuates in a certain pressure range. In particular, even when the pressure is high, the upper limit of the flow rate can be regulated. If the secondary conditions (nozzle diameter, number of nozzles, pipe length, etc.) do not change, the secondary pressure can be controlled to be constant.

The operation of the dishwasher having the above configuration will be described below. In FIG. 1, two lines of tap water and hot water via a hot water supply system are connected to the dishwasher 1, and these water and hot water are supplied to a fixed pressure and temperature control mechanism 30 described in FIG. It is a constant temperature, the upper water passage 11, via the funnel section 21, dropped to the upper washing nozzle 4 as therefrom, is reserved in the water reservoir 7. Next, the first and second pumps 8 and 9 are started, and hot water is injected from the upper and lower cleaning nozzles 4 and 6,
Perform prewash. Pre-wash for about 30 seconds and drain.

The main washing is also performed with circulating water. However, the time is about 10 minutes, and the temperature of the hot water is raised (for example, 60 ° C.) using a detergent.

Next, a rinsing step is performed. The rinsing step is divided into a general rinsing and a final rinsing. In general rinsing, circulating rinsing consisting of water injection, circulation and drainage is repeated a plurality of times.

In the final rinsing, the first and second pumps 8 and 9 are stopped, and the clean water is allowed to fall from the end of the upper water channel 11 to the funnel portion 21 in FIG. Then, the rinse is poured into the tableware of the upper and lower baskets 3, 5 in a state of being mixed with the tap water, and a rinse film is formed on the surface of the tableware. That is, the final rinse is a running water rinse. This rinse is a surfactant, which reduces surface tension and improves drainage. Next,
The dishes are dried by the fan 20 and the air heater 19. The finish is good because the amount of adhered water is small due to the action of the rinse.

In FIG. 2, since the upper water channel 11 is separated from the overflow surface 21a of the funnel portion by L2, there is no possibility that the hot water in the funnel portion 21 flows back to the upper water channel 11. Therefore, running water rinsing can be performed with the dishwasher directly connected to the water pipe, and rinsing can be mixed.

[0022]

As described above, according to the present invention, even if the temperature and pressure of the hot water from the hot water supply equipment changes, and even if the pressure of the tap water changes, the pressure control temperature control mechanism can control the temperature of the mixed hot water. In addition, since the pressure is kept constant, hot and cold water at a predetermined temperature can be injected into the tableware for a predetermined time . Therefore, despite being directly connected to the water pipe and the hot water supply facility, a good washing operation can be performed without damaging tableware and nozzles.

Further, since the dishwasher is provided with a pressure regulating temperature regulating mechanism comprising a temperature regulating valve and a constant flow valve, it becomes possible to supply hot water in an appropriate temperature range and at an appropriate flow rate. A good cleaning operation can be performed in a short time without damaging the device. In addition, it is possible to prevent water from entering the outside of the tank.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a dishwasher according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG. 1;

FIG. 3 is a configuration diagram of a pressure control temperature control mechanism of the present invention.

[Explanation of symbols]

1 ... dishwasher, 2 ... washing tank, 4 ... upper washing nozzle, 6
... lower washing nozzle, 11 ... water channel, 12 ... water pipe, 13
... Hot water supply equipment, 21 ... Funnel part, 30 ... Pressure and temperature control mechanism, 31
... casing, 32 ... hot water inlet, 33 ... water inlet, 34
... hot and cold water outlet, 35 ... differential pressure governor, 37 ... temperature control valve, 3
8 ... Constant flow valve. </ SDO>

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-111452 (JP, A) JP-A 56-131164 (JP, U) JP-A 63-147172 (JP, U) JP-A 63-147172 83161 (JP, U) Japanese Utility Model 2-18367 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) A47L 15/42 F24D 17/00

Claims (1)

(57) [Claims] 1. A dishwasher for storing dirty dishes in a washing tank and jetting hot water from a washing nozzle to wash the dishes, wherein the dishwasher receives hot water from a hot water supply facility. And a water-in port for receiving water from the water pipe, a hot-water outlet for discharging hot water, a temperature control valve for mixing hot water and water at an appropriate temperature, and a constant flow valve for keeping the mixed hot and cold water at a constant flow rate. consisting adjustment pressure regulating temperature mechanism is attached to the cleaning tank
Dishwasher characterized by the fact that it is .