JPH0724646B2 - Washer heat exchanger - Google Patents

Description

TECHNICAL FIELD The present invention relates to a structure of a heat exchanger for supplying hot water or the like to a washing machine for washing dishes and the like.

(Prior Art) Conventionally, various types of washing machines have been proposed for jetting hot water to washing objects such as tableware to wash them. For example, the actual Kaisho 56-12
No. 5157, No. 60-91166, No. 57-40907
This is a conventional technique disclosed in Japanese Patent Publication No.

A typical dishwasher as these conventional techniques is, for example, one in which hot water for washing is sprayed to wash dishes, and hot air is sprayed to the washed dishes to finish drying. A heater and a combustor for combusting gas are used to produce hot water for cleaning and hot air. It is more efficient to use a combustor to wash a large amount of dishes. This combustor also serves as a heat exchanger that exchanges heat between a fire or combustion gas generated by combustion with fresh water such as tap water or the outside air to generate hot water or high temperature air.

Such heat exchangers have been disclosed in the prior art (for example, the above-mentioned actual development 60
-91166, Japanese Utility Model Publication No. 57-40907, etc.), it is provided outside the washer and some heat medium (such as high-temperature water) is placed between the heat exchanger and the combustor. Etc.) are connected by a pipe.

(Problems to be solved by the invention) However, in the heat exchanger that also serves as the combustor, the outer peripheral wall of the combustor provided outside the washing machine is in contact with the outside air, and heat escapes from the outer peripheral wall. The thermal efficiency was low. Further, since a part of the exhaust gas is used as it is, the sulfurous acid gas in the exhaust gas is not suitable for drying tableware.

The object of the present invention is made in view of such a conventional defect, and an object of the present invention is to provide a heat exchanger of a cleaning machine which can improve thermal efficiency and is clean.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides warm water for cleaning, which is necessary for a cleaning process, a rinsing process and a drying process of a cleaning machine, respectively.
A heat exchanger for supplying high-temperature water for rinsing and high-temperature air for drying, a combustion chamber equipped with a burner is provided in the lower part of the main body, and a fresh water chamber for producing high-temperature rinsing water is provided above the combustion chamber. A plurality of pipes are provided that penetrate through the fresh water chamber in the vertical direction and pass through the exhaust heat gas and the fire, and the exhaust heat gas and the fire that rise above the fresh water chamber and through the pipes are provided. An air heater for producing high temperature air for drying is provided, and a recirculation chamber for producing hot water for washing is provided on the outer peripheral surface of the main body cylinder.

(Function) By passing hot water for cleaning through the reflux chamber provided in contact with the outer circumference of the main body, the heat escaping from the outer circumference of the conventional main body can be recovered as heat for keeping warm water and heating. Therefore, the thermal efficiency can be improved, and the drying can be performed with clean high-temperature air in which exhaust gas is not mixed.

(Example) An example of the heat exchanger of the washing machine of the present invention will be described below with reference to FIG. On the main body of the washing machine, there is a hot water tank 1 for storing hot water for washing containing detergent and the like. On the upper surface of the hot water tank 1, a chain conveyor, a crank link, or the like, which is a conveying means (not shown), is provided. Objects to be washed such as dishes are conveyed on the conveying means and are conveyed inside the main body of the washing machine.

Along with this conveyance, washing steps such as a washing step, a rinsing step, and a finishing drying step are performed. However, it is also possible to carry out these steps continuously at one place without carrying by the carrying means.

The cleaning process is performed with the warm water for cleaning ejected from the nozzle of the first nozzle mounting pipe 2. The warm water generally contains a detergent, but the detergent does not necessarily have to be included. Further, generally, the object to be washed is carried on the carrying means while being held on the rack for washing, and the washing rack and the object to be washed pass through the washing step at the same time. 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 3. The finish drying step is performed by injecting high-temperature air from the injection holes of the box-shaped high-temperature air injecting body 4 onto the object to be washed that has been rinsed. The object to be cleaned that has undergone these steps is carried out of the cleaning machine by the transporting means. However, it is also possible to finish all the washing steps in one place as described above.

The first nozzle mounting pipe 2 and the second nozzle mounting pipe 3
Are attached to the nozzle tubes 5 and 6, respectively.

The above washing process is performed in the main body of the washing machine. Outside the main body of this washing machine, hot water used in the washing process,
A heat exchanger 7 which also functions as a combustor for supplying high-temperature water and high-temperature air is provided. A combustion chamber 8 is formed at the bottom of the heat exchanger 7, and a burner 9 is provided inside the combustion chamber 8.
Is installed upwards. A fuel stop valve 11 that can be electrically opened and closed is provided in the middle of a fuel pipe 10 that feeds fuel to the burner 9. The fire and the combustion gas generated by the combustion of the burner 9 rise through the inside of the main body 12. Inside the main body 12, a fresh water chamber 13 that is a water passage for passing fresh water is formed. A plurality of pipes 14 vertically pass through the fresh water chamber 13 to allow exhaust heat gas and fire to pass therethrough, and constitute a heat exchange section A. Fresh water is supplied to the fresh water chamber 13 through a pipe 15 and a water supply pump 16 through which the fresh water passes. The high-temperature water produced by being supplied into the heat exchange section A is guided through the high-temperature water communication pipe 17 to the second nozzle mounting pipe 3 for injecting the high-temperature water.

An air heater 18 composed of a meandering pipe is provided as an air passage for air in the heat exchange section B arranged in the main body 12 and above the heat exchange section A. Air is sent to the air heater 18 via an air blower 19, and the hot air produced here is guided to the hot air jet 4. A part of the air sent from the air blower 19 is sent to the burner 9.

The warm water in the warm water tank 1 is guided to the first nozzle mounting pipe 2 for injecting the warm water pumped up by the cleaning pump 21. Two communication pipes 22 and 23 are provided on one wall of the hot water tank 1 and communicate with a reflux chamber 24 provided in contact with the outer circumference of the main body cylinder 12 of the heat exchange section A. As a result, the warm water circulates in the circulation chamber 24. That is, the hot water in the hot water tank 1 flows into the reflux chamber 24 through the lower communication pipe 22, absorbs the heat that has conventionally escaped from the outer periphery of the main body cylinder 12, and is warmed to pass through the upper communication pipe 23. Return to tank 1. Thereby, the warm water in the warm water tank 1 is heated or kept at a constant temperature. An air drain heat exchanger 25 is provided in the air pipe between the air blower 19 and the air heater 18. The air drain heat exchanger 25 is composed of a plurality of pipes 27 through which hot water introduced from the lower communication pipe 22 through a drain pipe 26 passes, and a closed pipe 28 accommodating the plurality of pipes. The air sent by the air blower 19 passes through the closed pipe 28, exchanges heat with warm water to be preheated, and is guided to the air heater 18. Hot water that has passed through multiple pipes 27 is drain drain vent pipe 33
Is discharged through. This drain drain vent pipe 33
It has a function of making the water level of the warm water tank 1 constant. The fuel supplied to the burner 9 may be a gas body such as city gas or a liquid such as kerosene. Further, the hot water tank 1 has a receiving portion 29, which receives hot water and high-temperature water that have been washed and rinsed and collects them for use again as hot water for washing. Also, air blower 19
The amount of air sent from is adjusted by the damper 30.

Next, the operation of this embodiment will be described. In the burner 9, the fuel sent by the fuel pipe 10 and the air sent by the air pipe 31 are mixed and injected into the combustion chamber 8 for combustion. By this combustion, heating and warming of warm water for cleaning, heating of clean water, and heating of air are simultaneously performed.

That is, the hot water in the hot water tank 1 flows into the reflux chamber 24 through the lower communication pipe 22 and is heated, and then the upper communication pipe 23.
It is returned to the hot water tank 1 via. The hot water for cleaning kept at a constant temperature in this way is pumped up by the cleaning pump 21 and ejected from the first nozzle mounting pipe 2 to perform the cleaning step. The warm water used for this cleaning is stored again in the warm water tank 1.

Next, the fresh water for the rinsing step is fed into the charcoal by the water feed pump 16 through the water feed pipe 15. The tap water pump 16 can be omitted by using ordinary tap water as fresh water. In the fresh water chamber 13 of the heat exchange section A, the fresh water sent in is subjected to heat transfer by radiant heat or conductive heat from a fire or combustion gas to become high temperature water. This high-temperature water is sprayed from the second nozzle mounting pipe 3 through the high-temperature water communication pipe 17 to wash the entire object to be washed and finish the rinse.

The air sent by the air blower 19 is preheated by hot water for cleaning in the air drain heat exchanger 25, and then sent to the air heater 18. In the air heater 18 arranged in the heat exchange section B, the air exchanges heat with the combustion gas to become high temperature air.

The hot air is jetted from the box-shaped hot air jet 4 through the hot air pipe 32 to dry the wet object to be washed after washing and rinsing. The hot air jet 4
The position of the injection hole provided in the position is a position where the cleaning target can be directly sprayed or swirl-shaped, and the drying can be performed quickly.

The hot water or hot water used in the washing process or rinsing process as described above flows into the hot water tank 1 and is used again as hot water for washing. Thus, the temperature of the hot water for cleaning becomes low during repeated use. The reason why the temperature becomes low is that heat energy is lost due to heat transfer to the cleaning object, removal of the heated cleaning object, and further heat dissipation from the upper surface or the peripheral wall of the hot water tank 1. . In order to compensate for this loss, hot water for cleaning is provided in the recirculation chamber 24 provided on the outer circumference of the main body 12 of the heat exchanger as described above.
The heat that has conventionally escaped from the outer periphery of the main body cylinder 12 can be effectively used for keeping warm water for cleaning by pouring into and circulating.

As described above, the heat exchanger of the washing machine of the present embodiment is a triple heat exchanger capable of supplying hot water, high-temperature water, and high-temperature air to the washing machine by one combustor, and the hot water is conventionally wasted. It effectively uses the heat that escaped to.

(Effects of the Invention) As described above, the heat exchanger of the washing machine according to the present invention is provided with the combustion chamber provided with the burner in the lower portion inside the main body body,
A fresh water chamber for producing high-temperature water for rinsing is provided on the upper part of the combustion chamber, and a plurality of pipes for passing the exhaust heat gas and the fire opened through the fresh water chamber in the vertical direction are provided, and the upper part of the fresh water chamber. And an air heater for producing hot air for drying which is heated by the exhaust heat gas and fire rising through the pipe, and a circulation chamber for producing hot water for washing on the outer peripheral surface of the main body cylinder. Hot water for cleaning,
The excellent effect of improving the thermal efficiency by simultaneously heating the hot water for rinsing and the hot air for drying is provided.

Further, since the hot rinse water is directly heated by the upper part of the combustion chamber and the pipe, it is efficiently and quickly heated, and the hot rinse water can be used separately from the hot water for washing. Since it can be rinsed, it has various effects such as excellent hygiene.

Furthermore, since the high-temperature drying air is created in the upper part of the fresh water chamber and does not use the exhaust gas for combustion, the drying efficiency is high and the inconvenience of soot is eliminated in drying the tableware, and the hygienic effect is excellent.

Furthermore, by providing a circulation chamber for producing hot water for cleaning on the outer peripheral surface of the main body, the hot water for cleaning in the hot water tank is heated or maintained at a temperature, and the heat around the main body is efficiently used. As a result, excellent effects such as the need for a heat insulating material around the main body cylinder can be obtained.

[Brief description of drawings]

FIG. 1 is an overall schematic view showing an embodiment of the heat exchanger of the washing machine of the present invention. 1 ... Warm water tank, 2 ... First nozzle mounting pipe, 3 ... Second nozzle mounting pipe, 4 ... High temperature air jet, 5,6 ... Nozzle pipe, 9 ... Burner, 10 ... … Fuel pipe, 11… Fuel stop valve 12… Main body, 13… Fresh water chamber (water channel), 15… Water supply pipe, 16… Water supply pump, 17… High-temperature water communication pipe, 18… Air heating Device (air passage), 19 ... air blower, 21 ... washing pump, 22 ... communication pipe, 24 ... recirculation chamber, 25 ... air drain heat exchanger, 26 ... drain pipe, 28 ... closed Pipe, 29 …… Reception part, 30 …… Damper, 33 …… Drain drainage vent pipe.

 ─────────────────────────────────────────────────── ───Continued from the front page (56) Bibliographic references Sho 28-5080 (JP, Y1) Actual application Sho 55-23989 (Actual development Sho 56-125157) A microfilm (JP, U) of which the contents were photographed A microfilm (JP, U, of which the description and drawings attached to the application of Japanese Patent Application No. 58-182192 (No. )

Claims (1)

[Claims] 1. A heat exchanger for supplying hot water for washing, hot water for rinsing, and hot air for drying, which are respectively required for the washing step, rinsing step and drying step of the washing machine, and is provided at the bottom of the main body. A combustion chamber provided with a burner is provided, and a fresh water chamber for producing high-temperature water for rinsing is provided above the combustion chamber, and a plurality of pipes that pass through the fresh water chamber in the vertical direction to pass exhaust heat gas and fire are provided. An air heater is provided at the top of the fresh water chamber and heated by the exhaust heat gas and the fire that has risen through the pipe and creates hot air for drying, and hot water for washing is provided on the outer peripheral surface of the main body cylinder. A heat exchanger for a washing machine, which is equipped with a circulating circulation chamber.