KR200426632Y1 - exterior type preheater for dish washer - Google Patents

Abstract

The external type preheater for a dishwasher according to the present invention is connected to the overflow pipe 16 provided in the rinse tank 14 of the dishwasher, and receives the rinse water overflowed from the rinse tank 14 to store water ( 52); Built-in case 52, the one end is connected to the raw water supply pipe 481 outside the washing machine and the other end is connected to the rinsing water supply pipe 482 leading to the rinsing water tank 14, the raw water at room temperature supplied from the water supply source Is preheated by heat exchange with the overflowed rinsing water in the case (52) and then supplied to the rinsing tank (14).

Here, the preheating tube 54 is formed in a zigzag form by using a corrugated tube having a large heat exchange area per unit length, thereby achieving high heat exchange efficiency in the case 52.

In addition, when the amount of the rinsing water introduced from the rinsing tank exceeds the appropriate amount on the top of one side of the case, an overflow outlet for discharging it is formed, the bottom of one side for easily discharging the water stored in the case A drain cock is provided.

Description

Exterior preheater for dish washer

1 is a perspective view showing a dish washer according to the prior art.

Figure 2 is a schematic diagram showing the configuration of a dish washing machine according to the prior art.

Figure 3 is a schematic diagram showing the internal structure of the washing water tank and the rinsing water tank and the water supply device in the dishwasher according to the prior art.

Figure 4 is a perspective view showing an external preheater for a dish washer according to an embodiment of the present invention.

Figure 5 is an enlarged perspective view showing the configuration of the external type preheater for dishwasher according to an embodiment of the present invention.

6 is a schematic view showing the configuration of an external type preheating apparatus according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: reservoir tank 12: washing tank

14: rinse bath 15: heater

16: overflow pipe 481: raw water supply pipe

482: rinsing water supply pipe 50: preheating device

52: case 521: cover

54: preheating pipe 541: first connecting socket

542: second connection socket

The present invention relates to a dishwasher, and more particularly, to a dishwasher for a business to improve the energy consumption efficiency by reducing the power consumption required for rinsing water heating.

In general, commercial dishwashers used in large restaurants, such as the storage tank 10 constituting the washing tank 12 and the rinsing tank 14 as shown in Figure 1 and 2, and the storage tank (10) Opening and closing the washing space formed between the upper and lower washing impeller 20, 20 'and the upper and lower rinsing impeller 22, 22' and the upper and lower washing impeller 20, 20 ' It comprises a slide cover 30, the rack 32 and the like interposed in the washing space.

The washing impeller 20, 20 ′ and the rinsing impeller 22, 22 ′ are connected to the washing water tank 12 and the rinsing water tank 14 through the washing water pipe 201 and the rinsing water pipe 221, respectively. The rinsing water pipe 221 is disposed at one side of the washing water pipe 201 and its front end is commonly connected to the upper and lower rotary caps 24 and 24 ', respectively, to the washing impeller 20 and 20' and the rinsing impeller. 22 and 22 'are rotatably coaxially connected to the rotary caps 24 and 24'.

The upper washing impeller 20 and the upper rinsing impeller 22 are configured with a plurality of nozzles 20a and 22a downwardly, and the lower washing impeller 20 'and the lower rinsing impeller 22' are upwards. Nozzles 20a 'and 22a' are configured.

The storage tank 10 has a washing pump 26 for supplying the washing water in the washing water tank 12 to the upper and lower washing impellers 20 and 20 'through the washing water pipe 201 and the rinsing water pipe 221. A rinsing pump 28 for supplying rinsing water in the rinsing water tank 14 to the rinsing impellers 22 and 22 'is provided, and the stored water is stored in the rinsing water tank 14 of the water storage tank 10 at a predetermined temperature. The heater 15 (refer FIG. 3) is attached to maintain the above and to increase the washing and rinsing effect.

In addition, the inside of the rinsing tank of the storage tank 10 is provided with an overflow pipe 16 for discharging to the outside when the rinsing water supplied to the rinsing tank overflows.

And, the dishwasher is provided with a water supply device for heating the raw water at room temperature to a certain temperature by an external instantaneous water heater 40, as shown in Figure 3 and then supply to the washing water tank 12 and the rinsing water tank 14 The water supply device includes a main supply pipe 42 extending from an instantaneous water heater 40 provided outside the washer, a solenoid valve 44 provided at the tip of the main supply pipe 42, and a washing water tank therefrom. It consists of a washing water supply pipe 46 and the rinsing water supply pipe 48 connected to the 12 and the rinsing water tank (14).

The dish washing process according to the conventional dishwasher proceeds in the order of the water storage step, the washing step, the waiting step, and the rinsing step.

In the water storage stage, the raw water at room temperature is first heated to a predetermined temperature (44 to 46 ° C.) using a heat source such as an instantaneous water heater 40 provided outside the dishwasher, and then the water is washed through the water supply device. It is supplied to the water tank 12 and the rinsing water tank 14, wherein the solenoid valve 44 is the water to the washing water tank 12 and the rinsing water tank 14 through the washing water supply pipe 46 and the rinsing water supply pipe 48. The supply state is controlled, and the water introduced into the rinsing water tank 14 is heated by the heater 15 to maintain a set temperature of a predetermined value or more.

After a certain amount of washing water is secured through the water storage step, the washing step is performed. In the washing step, the washing water is transferred by the washing pump 26 in a state in which a small amount of detergent is mixed in the washing water, and the upper and lower washing impellers 20 are disposed. By spraying through the nozzles 20a and 20a 'of the 20', the dishes contained in the rack 32 are washed, and the sprayed washing water passes through the sieve 121 at the top of the washing tank 12 again. 12), and then repeats the circulation process that is conveyed through the washing pump 26 for a certain period of time (see FIG. 2).

In the washing step, the washing impellers 20 and 20 'are rotated by the pressure of the washing water sprayed through the nozzles 20a and 20a', thereby increasing the washing efficiency.

When the washing step is finished, a certain time interval from the stop of the spray operation of the washing water through the washing impeller 20, 20 'until the operation of the rinse pump 28 and the rinse impeller 22, 22' is started By allowing the washing water remaining in the washing impellers 20 and 20 'to be discharged to some extent by the own weight, the waiting step of preventing the mixing of the rinsing water and the washing water in the rinsing step is performed.

In the rinsing step, the rinsing water stored in the rinsing water tank 14 is transferred through the rinsing pump 28 and sprayed through the rinsing impellers 22 and 22 ′ to remove detergent components remaining in the dishes. The rinsing water used in the rinsing operation is not circulated but drained after being used once.

Here, the rinsing impellers 22 and 22 'are rotated by the pressure of the rinsing water injected from the nozzles 22a and 22a' like the washing impellers 20 and 20 ', thereby increasing the rinsing efficiency.

On the other hand, in the operation of the dishwasher, a rinse is added to the rinsing water to increase the drying efficiency of the rinsed dishes, the rinse will cause bubbles when the temperature of the rinsing water is below a certain value (about 70 ℃) It is desirable to maintain the temperature of the rinsing water more than a certain level because it may give a disgust to the user.

On the other hand, since the temperature of the water firstly heated by the instant water heater 40 is about 44 to 46 ° C., the rinsing water tank 14 may secondary the rinsing water stored through the built-in heater 15 as described above. Heating to maintain a temperature above a certain value (85 ℃).

However, according to the related art, since the first heated rinsing water has to be heated by a considerably high temperature difference (about 44 ° C. to 85 ° C.) during the second heating process through the heater 15, many operations in the operation of the heater 15 are performed. The power is consumed, resulting in a problem that the energy consumption efficiency of the cleaner is lowered.

The present invention has been made to solve the above-mentioned conventional problems, by preheating the water supplied from the instant water heater to the rinsing water tank to reduce the power consumption of the heater, as a result of which the energy consumption efficiency is improved, and made in the external type An object of the present invention is to provide a preheating device for the dishwasher which can be easily connected to the dishwasher.

The external type preheater for a dishwasher provided to achieve the above object is connected to the overflow pipe provided in the rinsing tank of the dishwasher to receive and store the overflowed rinsing water from the rinsing tank; Built in the case, one end is connected to the raw water supply pipe outside the washer and the other end is connected to the rinsing water supply pipe leading to the rinsing tank, so that the raw water at room temperature supplied from the water supply is preheated by heat exchange with the overflowed rinsing water in the case. And then includes a preheating tube to be supplied to the rinsing bath.

Here, the preheating tube is made of a corrugated tube having a large heat exchange area per unit length to form a zigzag shape, so that the heat exchange efficiency in the case is high.

In addition, when the amount of the rinsing water introduced from the rinsing tank exceeds the appropriate amount on the top of one side of the case, an overflow outlet for discharging it is formed, the bottom of one side for easily discharging the water stored in the case A drain cock is provided.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 4 to 6.

First, as shown in FIGS. 4 and 5, the preheating device 50 according to the present embodiment is detachably connected to the overflow pipe 16 provided in the rinsing water tank of the dishwasher and forms a predetermined space therein. And a preheating tube 54 embedded in the case 52.

The case 52 has an open top surface, and has a structure capable of being opened and closed by a cover 521 hinged to an upper end thereof, and locking one side of the cover 521 in the closed state of the cover 521 on one side thereof. An instrument 522 is provided.

One end of the preheating pipe 54 is connected to the raw water supply pipe 481 for supplying the raw water through the instantaneous water heater 40 outside the dishwasher, and the other end of the preheating pipe 54 is connected to the rinsing water tank. 482 is connected.

Here, the connection structure of the preheating pipe 54, the raw water supply pipe 481, and the rinsing water supply pipe 482 passes through one side wall of the case 52 and has a pair of (first and second) connecting sockets 541 ( 542 is mounted, and one end of the preheating pipe 54 and the raw water supply pipe 481 are fastened to the inner end and the outer end of the first connection socket 541, respectively, and to the inner end and the outer end of the second connection socket 542. Each of the other end of the preheating pipe 54 and the rinsing water supply pipe 482 is fastened.

The preheating tube 54 is bent in a zigzag form so as to expand the heat exchange area within a limited section, and is made of a metal material such as copper having high thermal conductivity, particularly in the case 52. In addition to the easy configuration, it is preferable to use a corrugated pipe to increase the heat exchange area per unit length.

In addition, when the amount of rinsing water introduced from the rinsing tank is excessive, one side upper end of the case 52 is formed with an overflow outlet 52a for discharging it, and the lower end of one side is stored in the case 52. A drain coke 522 is provided for easily discharging water.

Referring to the operation of the external type preheater for dishwasher according to the present embodiment configured as described above are as follows.

First, the raw water which is first heated through the instantaneous water heater and then supplied with water passes through a preheating pipe 54 and a rinsing water supply pipe 482 of the raw water supply pipe 481 and the heating device 50 as shown in FIG. It is supplied to (14), the raw water supplied in the initial water storage stage is supplied to the rinsing tank 14 without undergoing a special preheating process, the secondary water is heated by the heater 15 in the rinsing tank 14 to a certain value (about 85 ℃) is maintained.

Then, after the washing step is finished, when the rinsing step is progressed, the amount of rinsing water stored in the rinsing tank 14 is reduced by the amount used, and in order to replenish the raw water is supplied to the rinsing tank 14, at this time, the appropriate amount The raw water supplied in excess flows into the case 52 of the preheater 50 through the overflow pipe 16 and is stored.

Here, since the rinsing water overflowed from the rinsing tank 14, so-called preheating water, is heated at a high temperature (about 85 ° C.) in the rinsing tank 14, the raw water supply pipe in the state where the preheating water is stored in the case 52. The primary heated raw water supplied through 481 passes through the preheating tube 54 to exchange heat with the surrounding preheated water, which is higher than the primary heating temperature at about 65 ° C.

Therefore, according to the present embodiment, the temperature rise of the rinsing water made by the heater 15 in the rinsing tank 14 is about 20 ° C. (66 ° C. to 85 ° C.), which is greatly reduced than the conventional 40 ° C. difference (44 ° C. to 85 ° C.). ℃ → 85 ℃) the power consumption of the heater 15 required for the second heating time of the rinsing water is reduced.

The rinsing water overflowed from the rinsing tank 14 in this preheating process continues to flow into the case 52 of the preheating device 50, and the preheating water exceeding the low capacity of the case 52 is overflowed to the overflow outlet 52a. Since the preheated water in the case 52 is maintained at a constant temperature because it is discharged through), the preheating effect is also maintained.

After using the preheater according to the present embodiment, the preheating water remaining in the case 52 is discharged through the drain cock 522, and the cover 521 is opened to clean the inside of the case 52. Will be stored as.

On the other hand, in the preheating apparatus according to the present embodiment, the overflow pipe 16 of the dishwasher is detachably connected to the case 52, and the raw water supply pipe 481 and the rinsing water supply pipe 482 are connected to the socket 541. Due to the characteristic of the external type connected to the preheating pipe 54 through 542, it can be easily connected to the existing dishwasher, and can also be used in a way that the raw water supply pipe is directly connected to the water pipe without passing through the instant water heater. In addition, the pipe connection structure can be configured in various ways.

As described above, since the external type preheater for a dishwasher according to the present invention supplies raw water to a rinsing tank preheated by using a high temperature preheating water overflowed from the rinsing tank, the second heating of the rinsing water using a heater is performed. The required power consumption is reduced, and the secondary heating time is also reduced, resulting in an improved energy consumption efficiency of the use of the cleaner.

Claims (4)

A case connected to the overflow pipe provided in the rinsing tank of the dishwasher to receive and store the overflowed rinsing water in the rinsing tank; Built in the case, one end is connected to the raw water supply pipe outside the washer and the other end is connected to the rinsing water supply pipe leading to the rinsing tank, so that the raw water at room temperature supplied from the water supply is preheated by heat exchange with the overflowed rinsing water in the case. And then, the preheating tube to be supplied to the rinsing tank; External preheater for dishwasher comprising a. The method of claim 1, The preheating tube is a pre-heating device for a dishwasher, characterized in that the heat exchange efficiency in the case is made high by using a corrugated pipe having a large heat exchange area per unit length in a zigzag form. The method of claim 1, If the amount of rinsing water introduced from the rinsing tank exceeds the appropriate amount on the top of one side of the case, an overflow outlet for discharging it is formed, the bottom side of the side drain drain for easily draining the water stored in the case External preheater for dishwasher, characterized in that the provided. The method of claim 1, The case is an external preheater for a dishwasher, characterized in that the one side is made of a structure that can be opened and closed.

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