JPH0722568B2 - washing machine - Google Patents

Description

The present invention relates to the structure of a washing machine for washing dishes and the like.

(Prior Art) Conventionally, various types of washing machines for jetting hot water to washing objects such as dishes and washing have been proposed. For example, Jitsukai 56-1251
The prior art is disclosed in Japanese Patent Publication No. 57, Japanese Utility Model Publication No. 60-91166, Japanese Utility Model Publication No. 57-40907, and the like.

A typical dishwasher as these conventional techniques is, for example, to carry dishes by placing them on a conveyor that is a transporting means, spraying washing water on the dishes that are being conveyed to wash, and washing the dishes with hot air. Is spouted to finish and dry. A heater and a combustor that burns gas are used to generate hot water for cleaning and hot air. Combustors are efficient for cleaning large quantities of dishes.

(Problems to be Solved by the Invention) However, most combustors of the prior art (for example, those described in Japanese Utility Model Publication No. 60-91166 and Japanese Utility Model Publication No. 57-40907) are cleaned. It was installed outside the machine. For this reason, the combustor and the washer must be connected by a pipe through which a heat medium (such as exhaust heat gas) passes, and the heat escaping from the pipe and the outer peripheral wall of the combustor has a low thermal efficiency.

Further, as disclosed in Japanese Utility Model Application Laid-Open No. 56-125157, there is also one in which a washing machine and a combustor are integrally provided, but the outer peripheral wall of the combustor is in contact with the outside air, so that the thermal efficiency is still high. It was low.

Further, although the thermal efficiency can be improved by covering the outer peripheral wall of the combustor with a heat insulating material or the like, the cost of the cleaning device is increased due to the provision of the heat insulating material.

(Means for Solving the Problem) The present invention has a structure in which a washing machine and a combustor are integrated with each other, and a heat exchanger is thinly exposed in a hot water tank by using exhaust gas of a combustion chamber as a heat medium. Further, the thermal efficiency is improved by guiding the air sent into the air chamber formed around the combustion chamber to the high temperature air jet.

As a concrete means for solving the above-mentioned problems of the prior art, the present invention has a conveying means for conveying an object to be cleaned, a means for injecting warm water for cleaning to the conveyed object to be cleaned, and a means for cleaning. Rinsing means for injecting clean high-temperature water to the object to be rinsed for rinsing, drying means for injecting high-temperature air to the object to be rinsed for finishing drying, and exhaust gas from the combustion chamber that generates heat A heat exchanger that is introduced as a heat medium to heat the clean high-temperature water and high-temperature air, and a hot water tank that stores the hot water for cleaning and receives the hot water that has been rinsed to be hot water for cleaning, In the washing machine, the outer peripheral body plate of the heat exchanger is attached to the bottom part of the hot water tank so as to be exposed under the hot water surface for washing, and the rinsing means and the drying means are performed in the same region. is there.

(Operation) By exposing the outer shell of the heat exchanger below the surface of the wash water inside the hot water tank, the wash water can be heated and kept warm, and the heat can be effectively used. Further, since the rinsing means and the drying means can be provided in the same region, the washing machine itself can be downsized and efficient washing and drying can be performed.

(Embodiment) An embodiment of the washing machine of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a vertical sectional view showing an outline of the entire washing machine, and FIG. 2 is a side view of FIG.

A hot water tank 2 for storing washing water containing detergent etc. is provided below the inside of a frame 1 which is a casing of the entire washing machine.
Is provided. On the upper surface of the hot water tank 2, a chain conveyor 3 as a transfer means is provided. It is also possible to use a crank link instead of the chain conveyor. Objects to be washed such as dishes are placed on the chain conveyor 3 and conveyed into the washing machine. Along with this conveyance, washing steps such as a washing step, a rinsing step, and a finishing drying step are performed.

The cleaning step is performed by the warm water for cleaning ejected from the nozzle of the first nozzle mounting pipe 4. Detergent does not necessarily have to be included in the warm water for cleaning. In general, the object to be cleaned is held on the cleaning rack 5 while the chain conveyor 3
Thus, the cleaning rack and the object to be cleaned simultaneously pass through the cleaning step. The rinsing step is performed by spraying clean high-temperature water onto the cleaned object to be cleaned by the nozzle of the second nozzle mounting pipe 6.
The finish drying step is performed by injecting high-temperature air from the injection holes of the box-shaped high-temperature air injecting body 7 onto the rinsed cleaning target object. The object to be cleaned after these steps is carried out of the cleaning machine by the chain conveyor 3. The first and second nozzle attachment pipes 4 and 6 are attached to nozzle pipe holders 8 and 9, respectively. At the entrance where the object to be cleaned is transported, a door 10 made of a rounded door is provided.
Is provided, and another door 11 is provided at the outlet so that the heat inside the washing machine, especially the heat in the hot water tank 2, does not escape to the outside.

In the combustion chamber 12, the fuel mixes with the outside air and burns. This combustion chamber
The exhaust gas from 12 is guided to the heat exchanger 13 adjacent to the combustion chamber 12. The fresh water introduced to the heat exchanger 13 is supplied to the water supply pipe 14
Through to the fresh water pump 15. The heat exchanger 13 has a structure in which a plurality of pipes for passing exhaust gas are provided in parallel inside the outer peripheral body plate serving as a closed container, and fresh water passes between the plurality of pipes. A fresh water pipe 16a that connects the fresh water pump 15 and the heat exchanger 13 is provided with a water stop valve 17 that is electrically opened and closed.

Further, a through-flow guide plate 50 having a large number of through-holes is horizontally provided in the heat exchanger 13, and through the through-holes of the through-flow guide plate 50, fresh water rises in the fresh-water pipe 16b and moves toward the nozzle pipe. Pushed up to 9.

The hot water tank 2 is for storing hot water for cleaning as described above, but the hot water tank partition plate 18 receives the hot water used in the rinsing step and the hot water for cleaning used in the washing step.
have. The hot water and the hot water for cleaning received by the hot water tank partition plate 18 are guided to the inside of the hot water tank by the central guiding pipe 19. As a result, the heat of the hot water for cleaning in the hot water tank 2 is hard to escape. Further, a dish tray 21 having a filter 20 provided so as to cover the entire surface of the hot water tank partition plate 18 is arranged to remove the washing debris dropped in the washing step and the rinsing step from the hot water or the like. A wash water discharge pipe 22 is provided in the warm water tank 2. The wash water discharge pipe 22 is divided into two branches, one end 23 of which opens at the bottom of the hot water tank 2 and the other end 24 of which opens at the hot water surface for washing. The end opened on the bottom surface functions to discharge dirty hot water to the outside, and the end opened on the hot water surface for cleaning functions to keep the water level on the hot water surface constant. The wash water discharge pipe 22 opens into a pit 25 provided outside the bottom surface of the warm water tank 2. The pit 25 is connected to the discharge pipe 22 to discharge dirty hot water or overflow hot water to the outside of the washing machine. Further, the pit 25 is removable so that when dust is accumulated in the pit 25, it can be easily cleaned and the discharge pipe 22 is not clogged. Further, the outer peripheral body plate 26 of the heat exchanger 13 is exposed inside the hot water tank 2. This exposed position is below the surface of the hot water. As a result, the warm water for cleaning is heated to a temperature higher than that of the water in the warm water tank 2, and at the same time, the heat retention is efficiently performed. The side wall of the warm water tank 2 is connected to the water absorption pipe of the cleaning pump 27. The pump 27 pumps hot water and guides it to the first nozzle mounting pipe 4 through a cleaning pipe 28.

An air chamber 31 is formed around the combustion chamber partition wall 30 forming the outer peripheral wall of the combustion chamber 12 so as to cover the periphery. Outside air is sent into the air chamber 31 by an air blower 32.
The hot air heated in the air chamber 31 is guided to the hot air ejector 7 through the hot air pipe 33. The hot air pipe 33 is provided with an exhaust gas stop valve 34 that can be electrically opened and closed. Further, a burner 35 is attached to the combustion chamber 12, and a part of the air sent from the air blower 32 is guided to the burner 35 for combustion. This burner 35
A fuel stop valve 37 that can be electrically opened and closed is provided in the middle of the fuel pipe 36 that guides the fuel to.

The exhaust gas that has undergone heat exchange in the heat exchanger 13 is discharged to the outside of the washing machine through the exhaust gas pipe 38.

Furthermore, in the pit 25, a fresh water pipe for passing the fresh water.
16a is inserted to allow heat exchange between waste water and fresh water. By this heat exchange, the heat of the waste water discharged to the outside is recovered without waste, and the fresh water that becomes high-temperature water is preheated.

Further, as the fuel, either a gas body such as city gas or a liquid such as kerosene can be used.

The hot air jetted from the hot air jet 7 dries the object to be washed, and then the door 11 at the outlet is discharged to the outside from the door 10 at the inlet.

The washing rack 5 is fed into the washing machine by the washing rack feeding mechanism 39.

The operation of this embodiment will be described below. When the rack 5 holding the object to be cleaned or the object to be cleaned is placed on the chain conveyor 3 at the point (A), the conveyance is started in the direction of arrow Q in the figure. When the object to be cleaned comes close to the door, the sensor 40 works to automatically open the entrance door 10. The door 10 may be opened manually. When the object to be cleaned is conveyed to the position of (B) in the figure, the entrance door 10 is closed automatically or manually. After that, the cleaning pump 27 starts to operate, and hot water for cleaning is jetted from the nozzle through the cleaning pipe 28, the nozzle pipe side 8, and the nozzle mounting pipe 4. The hot water stored in the hot water tank 2 in advance by a hose (not shown) is the heat exchanger 13.
It may be heated at the outer peripheral body plate 26 of the second nozzle pipe, or the fresh water sent from the fresh water pump 15 to the heat exchanger 13 is heated to become high-temperature water and jetted from the nozzle of the second nozzle mounting pipe 6. It may be received through the hot water tank partition plate 18 and stored in the hot water tank 2. Contamination of the object to be cleaned is removed by the flow rate and the jetting speed of this warm water. A surfactant may be added to this warm water, or it may be mere warm water. The warm water used for cleaning is stored again in the warm water tank, but is heated and kept warm by the outer peripheral plate of the heat exchanger.

Next, the object to be cleaned is conveyed on the chain conveyor 3 to the position (C) in the figure. The hot water is second to the hot water in the hot water tank which is sent to the heat exchanger 13 by the fresh water pump 15 and heated.
Rinsing is performed by jetting from the nozzle of the nozzle mounting pipe 6 of No. 2. As a result, the object to be cleaned is completely cleaned. The time required for this rinsing is generally a fraction of the time required for cleaning. Therefore, the next drying means is performed in the area of this rinsing means.

Next, water remains on the surface of the object to be cleaned that has been rinsed, and the water is dried by the high temperature air accelerated and ejected from the high temperature air ejector 7. When this finishing drying step is completed, the cleaning object conveyed again on the chain conveyor 3 is carried out of the cleaning machine through the exit door 11.

According to the washing machine of this embodiment, since the outer peripheral body plate of the heat exchanger 13 is exposed below the hot water surface for washing inside the hot water tank 2, the hot water is effectively heated and kept warm, and the heat is effectively used. It can be used. Also, the combustion chamber partition wall of the combustion chamber 12
By forming an air chamber 31 around 30 and sending air to this air chamber to make high temperature air and using it for finish drying, not only the heat insulating material of the combustion chamber 12 becomes unnecessary, but also the outer peripheral wall of the combustion chamber is configured. The heat escaping to the outside through the combustion chamber partition wall can be effectively used. Since the hot water and the high temperature water used in the rinsing process are mixed in the hot water tank to perform heat exchange, the heat of the high temperature water used in the rinsing process is not wasted. Further, in the washing machine of this embodiment, the washing process is divided into three stages of a washing process, a rinsing process and a finish drying process, hot water is used for washing, and high temperature water is used for rinsing. For this reason, the temperature of the object to be cleaned can be kept higher at the end of the rinsing process than using water of the same temperature for cleaning and rinsing, and the drying process is performed immediately after the rinsing process in the same area as the rinsing process. The drying in the next finish drying step is performed quickly. Therefore, it can be said that heat is effectively used.

(Effects of the Invention) As described above, according to the washing machine of the present invention, it is possible to improve heat efficiency without wasting heat as compared with a conventional washing machine provided with a combustor outside the washing machine. . Particularly, by exposing the heat exchanger to the inside of the hot water tank, it is possible to effectively heat and keep warm water for cleaning.

Further, since the rinsing means and the drying means are performed in the same area, the object to be cleaned is immediately blown with hot air by the drying means to be dried while keeping the object to be cleaned at a high temperature. The heat efficiency of the washing machine can be improved, and in combination with the specification of the arrangement position of the heat exchanger, the size of the entire washing machine can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view according to an embodiment of the washing machine of the present invention, and FIG.
The figure is a side view in which one half of FIG. 1 is cut away. 1 ... Frame, 2 ... Hot water tank, 3 ... Chain conveyor (conveying means), 4 ... First nozzle mounting pipe, 6 ...
… Second nozzle mounting pipe, 7 …… High temperature air jet, 12 ……
Combustion chamber, 13 ... heat exchanger, 14, 16a, 16b ... fresh water pipe,
15 …… Fresh water pump, 26 …… Perimeter shell plate, 27 …… Washing pump, 28 …… Washing pipe, 31 …… Air chamber, 32 …… Air blower, 33 …… High temperature air pipe.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Microfilm (JP, U), which is a photograph of the contents of the description and drawings attached to the application for Japanese Patent Application No. 55-23989 (No. 56-125157). A microfilm (JP, U) of the contents of the specification and drawings attached to the application of Japanese Utility Model Application No. 53-87325 (Japanese Utility Model Application No. 55-4765)

Claims (1)

[Claims] 1. A conveyance means for conveying an object to be cleaned, a means for injecting warm water for cleaning to the conveyed object to be cleaned, and a means for injecting clean high-temperature water onto the cleaned object to be washed. Rinsing means for rinsing, drying means for finishing drying by injecting high-temperature air to the object to be cleaned after rinsing, and exhaust gas of the combustion chamber that generates heat is introduced as a heat medium to clean high-temperature water and high temperature. A heat exchanger that heats air and a hot water tank that stores the hot water for cleaning and receives the hot water that has been rinsed as hot water for cleaning, and the outer shell of the heat exchanger is hot water for cleaning. A washing machine attached to the bottom of the hot water tank so as to be exposed below the surface, and the rinsing means and the drying means are performed in the same region.