JPH0631644U - Rinse unit in dishwasher - Google Patents

Abstract

(57) [Summary] [Purpose] Reduce the piping work between the water heater and dishwasher,
At the same time, the heat release is reduced and the temperature drop of the rinse water is made extremely small. [Structure] The sparker for ignition of the burner 53 operates, and immediately after the operation of the sparker, the pressure equalizing valve 55 opens and gas is supplied to the burner 53 to ignite the burner 53. In this way, the raw water flowing into the heating pipe 58 is heated by the burner 5 in the heating chamber 57.
It is heated by 3 and becomes rinse water of about 85 ° C. and is stored in the tank 63. The hot rinse water stored in the tank 63 is sprayed from the rinse nozzles 37, 37 toward the dishes by the pressure of the rinse pump 65, and the dishes are rinsed. At this time, the hot rinse water stored in the tank 63 is supplied into the dishwasher at a predetermined flow rate by the rinse pump 65 installed directly below the tank 63, and the rinse pump 65 and the rinse nozzles 37, 37 are connected to each other. Since a large-diameter pipe, unlike the conventional one, is not used between them, the temperature drop of the rinse water is extremely small.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dishwasher having a main washing step and a rinsing step, and more particularly to a rinsing unit in a dishwashing machine having an improved supply method of rinsing water in the rinsing step.

[0002]

[Prior art]

 The dishwasher cleans the dishes by injecting a washing liquid pressurized by a pump and rinsing water sequentially from the vertical direction onto the dirty dishes installed in the dishwasher. Conventionally, as this dishwasher, one having a structure as shown in FIG. 6 has been known. In FIG. 3, reference numeral 1 is a washing chamber for storing dishes, and main washing nozzles 2, 2 and rinsing nozzles 3, 3 are internally provided at both upper and lower ends thereof. Further, reference numeral 4 is a cleaning tank located below the cleaning chamber 1 for storing the cleaning liquid, and reference numeral 5 is a main cleaning pump for supplying the cleaning liquid in the cleaning tank 4 to the main cleaning nozzles 2, 2.

On the other hand, reference numeral 6 is a water supply source such as tap water, and reference numeral 7 is a water heater for preheating the raw water supplied from the water supply source 6. As the water heater 7, a commercially available domestic water heater is used. The hot water heated by the water heater 7 is introduced into the dishwasher by the rinsing pump 9 installed in the main body of the washing machine and supplied to the rinsing nozzles 3 and 3. Here, FIG. 4 shows a perspective view showing the structure of a conventional water heater 7. In FIG. 4, it is composed of a tank portion 11 having a heat exchanger 10 at its central portion and a gas burner 12 provided below the tank portion 11 and directly below the heat exchanger 10. The water stored in the tank portion 11 is heated in the pipe 13 penetrating the central portion of the heat exchanger 10 and becomes hot water, which is stored in the tank portion 11 as it is. The warm water that has reached a predetermined temperature is introduced into the dishwasher by the rinse pump 9 shown in FIG.

[0004]

[Problems to be solved by the device]

 In the dishwasher described above, in general, in the rinsing process, the rinsing water discharged from the rinsing nozzles 3 and 3 toward the dishes heats the dishes and accelerates the drying of the dishes after the rinsing. It must be a high temperature around ℃. However, in the conventional water heater 7, the water stored in the tank portion 11 is heated by the gas burner 12 installed in the lower portion of the tank portion 11, so the hot water is directly supplied from below the tank portion 11. Since it could not be taken out and the installation volume that could be taken for the water heater 7 was limited, the rinsing pump 9 could not be installed in the water heater, and as shown in FIG. Had to be installed in. Therefore, it was necessary to connect the water heater 7 and the soot pump 9 by a pipe line. In addition, a pipe having a large diameter (for example, 40 mm) is used as a pipe connecting the both in order to obtain a sufficient amount of hot water. Since this pipeline has a large number of parts, it takes a lot of piping man-hours, and since the heat release in the pipeline is large, the temperature of the rinse water drops.

The present invention has been made in view of the above circumstances, and provides a rinsing unit for a washing machine capable of reducing the number of piping steps, reducing heat release, and significantly reducing the temperature drop of rinsing water. It is an object.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention comprises a heating means, a tank for storing hot water for rinsing heated by the heating means, and a pump installed directly under the tank. The hot water for rinsing stored in the tank is sent to the dishwasher.

[0007]

[Action]

 The raw water is heated by the heating means and stored in the tank as predetermined warm water. Then, the hot water in the tank is supplied to the dishwasher as hot water for rinsing by a pump installed directly under the tank. As a result, the piping between the tank and pump can be minimized.

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the construction of an embodiment of the water heater of the present invention. In FIG. 1, reference numeral 48 is a water supply valve for adjusting the inflow of raw water into the hot water heater 46, and reference numeral 49 is a flow rate sensor for measuring the inflow amount of raw water. Reference numeral 50 is a thermistor for measuring the temperature of raw water. Here, the flow rate sensor 49 also functions as an empty heating prevention device. That is, when the raw water flow rate becomes equal to or lower than the predetermined set flow rate, the heating of the raw water in the hot water heater 46 is automatically stopped by the action of the flow rate sensor 49, and the empty heating is prevented.

Reference numeral 51 is a combustion chamber, and in the combustion chamber 51, a burner 53 is installed which uses gas as fuel and discharges the frame upward from a ceramic blade 52 formed at the upper end. Further, reference numeral 54 is an extinguishing safety device (frame rod) for detecting the presence or absence of the flame, reference numeral 55 is a pressure equalizing valve for supplying gas to the burner 53 and adjusting the supply amount thereof, and reference numeral 56 is supply air for the combustion chamber. And a fan motor that exhausts air.

A heating chamber 57 is formed in the upper portion of the combustion chamber 51, and a heating pipe 58 connected to the water supply valve 48 is arranged in a meandering manner around and inside the heating chamber 57. Reference numeral 59 is a temperature fuse for preventing overheating of the heating chamber 57, reference numeral 60 is a boiling prevention device for preventing boiling of rinse water in the heating pipe 58, and reference numeral 62 is for measuring the temperature of rinse water after heating. It is a thermistor.

A tank 63 is arranged near the heating chamber 57. This tank 63 is for storing high-temperature rinse water heated by the water heater 46, and its capacity depends on the flow rate of the rinse water into the tank 63, the operating time of the water heater 46, and the time required for the rinse stroke. It is set accordingly. Further, reference numeral 46 is a float switch. This is to prevent excessive supply of rinse water by detecting when the amount of water stored in the tank 63 exceeds a certain value and automatically closing the water supply valve 48. Further, a rinsing pump 65 is installed near the bottom of the tank 63, and the route from the water supply source 45 to the hot water heater 46, the tank 63, the rinsing pump 65, and the rinsing nozzles 37, 37 is via the water supply pipe 66. Are linked together.

On the other hand, reference numeral 67 is a detergent supply device. The detergent supply device 67 comprises a detergent tank 67a, a detergent pump 67b installed at the bottom of the detergent tank 67a, and a hose 67c connected to the detergent pump 67b. Further, the end of the hose 67c is the washing liquid of the washing tank 38. It opens on the liquid surface. Further, a branch 68 is formed at an arbitrary position in the water supply pipe 66 that connects the rinse pump 65 and the rinse nozzles 37, 37, and the tip of the conduit 69 extending from this branch 68 is connected to the detergent pump 67b. .

The water heater 46 described above is used in the dishwasher shown in FIG. In the figure, components having the same functions as those of the constituent elements shown in FIG. A feature of this dishwasher is that it is not necessary to install the rinsing pump 65 by using the hot water heater 46 described above. Therefore, in the dishwasher shown in FIG. 2, unlike the conventional dishwasher, it is not necessary to provide the hot water heater and the rinsing pump with pipes having a large diameter.

According to the above-described configuration, the hot water heater 46 is turned on at the same time as the start of the main washing process, and the water supply valve 48 is opened, so that the water pressure of the water supply source 45 causes the raw water at room temperature to be supplied. The water flows from 45 through the water supply pipe 66 into the hot water heater 47. The inflow of raw water is detected by the flow sensor 49, so that the burner 53 can be used. At the same time as the start of the main cleaning process described above, the air blow by the fan motor 56 is started, the air in the combustion chamber 51 and the heating chamber 57 is exchanged with the outside air (pre-purge), and the burner 53 is ignited by the sparker. Is activated, the pressure equalizing valve 55 is opened immediately after the operation of the sparker, gas is supplied to the burner 53, and the burner 53 is ignited. The ignition of the burner 53 is detected by the extinguishing safety device 54. In this way, the raw water flowing into the heating rod 58 is heated by the burner 53 in the heating chamber 57 and becomes rinse water at about 85 ° C. and is stored in the tank 63.

Further, at the end of the main washing process, the water supply valve 48 is closed and the inflow of raw water from the water supply source 45 to the hot water heater 46 is stopped. As a result, the flow rate of the raw water in the hot water heater 46 becomes 0, the pressure sensor 55 closes the pressure equalizing valve 55, the gas supply to the burner 53 is stopped, the burner 53 is extinguished, and the tank 58 from the heating pipe 58 is extinguished. The inflow of rinse water to 63 is also stopped.

On the other hand, the cleaning liquid in the cleaning machine is drained during the down time after the end of the main cleaning process. Then, the rinsing pump 66 is operated, and the high-temperature rinsing water stored in the tank 63 is sprayed from the rinsing nozzles 37, 37 toward the tableware by the pressure of the rinsing pump 65 to rinse the tableware. This is the rinsing process. At this time, the hot rinse water stored in the tank 63 is supplied into the dishwasher at a predetermined flow rate by the rinse pump 65 installed directly under the tank 63, and the rinse pump 65 and the rinse nozzles 37, 37 are also provided. Since the conventional large-diameter pipe is not used between and, the temperature drop of the rinse water is extremely small.

Then, the main washing process and the rinsing process are repeated at regular intervals with a rest period, and the dishes are automatically washed.

[0018]

[Effect of device]

 As described above, according to the present invention, the heating means, the tank for storing the hot water for rinsing heated by the heating means, and the pump installed immediately below the tank are provided. The hot water for rinsing stored in the tank is delivered to the dishwasher by the pump, which has the advantages of reducing the number of piping steps, reducing heat release, and reducing the temperature drop of the rinsing water. .

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing the structure of a water heater according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing the structure of a dishwasher in which the water heater of the present invention is used.

FIG. 3 is a partial cross-sectional view showing the structure of a conventional dishwasher.

FIG. 4 is a partial cross-sectional perspective view showing the structure of a conventional water heater.

[Explanation of symbols]

 57 heating chamber (heating means) 63 tank 65 rinsing pump (pump)

Claims (1)

[Scope of utility model registration request] 1. A rinsing unit, comprising: a heating unit; a tank for storing hot water for rinsing heated by the heating unit; and a pump installed immediately below the tank, the rinsing unit being stored in the tank by the pump. A rinsing unit in a dishwasher, characterized in that hot water is delivered to the dishwasher.