KR20040040302A - Control method for dish washer - Google Patents

Abstract

PURPOSE: A controlling method for a dish washer is provided to reduce washing time and improve energy consumption efficiency by heating air which is low in specific heat and producing hot water with heated air. CONSTITUTION: Water is supplied to a washing tub when washing or rinsing operation starts(702). Water and air in the washing tub are heated by actuating a feed pump, a heater and a blowing fan(704). Water supply stops when temperature of water in the washing tub is beyond a first standard temperature(706) by stopping the feed pump(708). Water is supplied to the washing tub and dishes are washed after starting the feed pump again(712) when air temperature of the washing tub exceeds(710) while the blowing fan and the heater are operated. Materials of high fusion point such as a lipstick and oil are removed easily by heating dishes with hot air. Washing or rinsing stroke is finished when specific time is passed(714). Therein, washing time is reduced and energy consumption efficiency is increased.

Description

How to control your dishwasher {CONTROL METHOD FOR DISH WASHER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher, and more particularly, to a dishwasher having a heater for heating washing water and rinsing water and performing a washing stroke, a rinsing stroke, and a drying stroke.

The dishwasher is a device that removes contaminants from the dishes by spraying cold or hot water on the dishes placed on the shelves inside the tub. This basically requires a pump and a nozzle for injecting the washing water or rinsing water, and a heater for generating hot water. Referring to Figure 1 such a conventional dishwasher as follows.

1 is a longitudinal sectional view showing a conventional dish washer. As shown in FIG. 1, a washing tub 104 having a front surface is provided inside the dish washing machine body 102, and a door 106 for opening and closing an opening of the washing tank 104 front surface is provided at the front surface of the main body 102. The hinges are combined. The upper and lower portions of the inside of the washing tank 104 are installed so as to slide the basket 104a, which is arranged to store the dishes, in the front and rear directions, and the spray nozzle 104c is disposed at the lower portion of the basket 104a to spray the washing water to the stored dishes. This is installed.

A heater 150 is installed below the basket 104a installed in the lower portion of the washing tank 104 to heat the washing water or the rinsing water to generate hot water. When the washing water or the rinsing water is supplied and the heater 150 is submerged in water, hot water is produced through heat exchange between the supplied water and the heater 150. The hot water produced is used to remove food waste, etc. attached to the tableware in the washing stroke, or to blow dry food waste. In the rinsing stroke, hot water is used to heat the dishes. When the dishes are heated with hot water in the last rinsing step of the entire rinsing stroke, the moisture is evaporated faster by the latent heat of the dishes in the drying stroke.

In a separate space provided below the basket 104a installed under the washing tank 104, a collecting tank 108 formed to collect washing water or rinsing water is installed, and the collecting container 108 includes a drain pump 110 and a water feed pump 112. ) Are connected through the drain pipe 110a and the circulation pipe 112a, respectively. The circulation pipe 112a is connected with the water supply pipe 104b connected with the injection nozzle 104c.

Through this structure, the washing water or the rinsing water sprayed from each spray nozzle 104c is sent to the water supply pipe 104b through the water collecting container 108 and the circulation pipe 112a by the pumping action of the water supply pump 112, and then again. By spraying through the injection nozzle 104c, the washing tank 104 is circulated, and when a predetermined washing time or rinsing time elapses, the washing tank 104 is discharged to the outside of the dish washing machine 102 by the action of the drain pump 110.

In such conventional heater-type dishwasher, since the heater must be submerged in order to make hot water, lime is deposited on the surface of the heater, which shortens the life of the heater and also generates a lot of time to generate hot water because the water is directly heated. This takes In addition, in the drying stroke, the air in the washing tank is heated using a heater. In this case, it is inconvenient to remove the dish immediately after the drying stroke is completed because the dish is excessively heated.

Among the conventional dishwashers, there is a heater external model configured to install a heater in a water supply pipe connected to a spray nozzle in a separate space provided outside the washing tank, and wherein heated water is supplied into the washing tank. In this case, too, since the heater is submerged in water, the problem of shortening the lifespan due to the calcification of the heater surface, increasing the washing time due to the direct heating of the water, and excessive energy consumption remain. In such a heater external dishwasher, instead of heating the air in the washing tank in order to prevent the dishes from being heated excessively in the drying stroke, the dishes are properly heated by rinsing the dishes using hot water at the last rinsing stage of the rinsing stroke, and then the dishes in the drying stroke. Allow for rapid drying by latent heat. As such, since the heater external dishwasher needs to dry the dishes using latent heat, hot water rinsing must be performed at the last rinsing stage immediately before the drying stroke, and thus, a single drying stroke without using water cannot be implemented. In addition, since the hot water rinsing step must be accompanied immediately before the drying stroke, unnecessary power consumption is incurred, which reduces the energy consumption efficiency.

The dishwasher according to the present invention has the purpose of heating the low specific heat air in the washing tank first, and generating hot water using the heated air to shorten the washing time, increase the energy consumption efficiency, and extend the life of the heater.

1 is a longitudinal cross-sectional view of a conventional dishwasher.

Figure 2a is a longitudinal sectional view of the dishwasher according to the present invention.

Figure 2b is a block diagram showing the configuration of a dishwasher according to the present invention.

Figure 3 is a graph showing the temperature and water supply control characteristics of the dishwasher according to the present invention.

Figure 4 is a flow chart showing a washing method of the dishwasher according to the present invention.

5 is a flowchart illustrating a rinsing method of the dish washing machine according to the present invention.

6 is a graph showing the temperature and water supply control characteristics of the dishwasher according to the present invention.

7 and 8 are a flow chart showing a control method of the dishwasher according to the present invention.

* Description of the symbols for the main parts of the drawings *

250: heater

252a: inlet

252b: blower

252c: exhaust port

254 blower fan

254a: fan motor

The control method of the dish washing machine according to the present invention for this purpose is to supply water in the washing tank while heating the air in the washing tank so that hot water is generated through heat exchange between the heated air and the supplied water.

Another control method of the dish washing machine according to the present invention starts the water supply in the washing tank while operating the warm air generating device to heat both the water supplied to the washing tank and the air inside the washing tank. When the temperature of the water in the washing tank exceeds the first reference value, the water supply is stopped and only the warm air generator is operated. When the temperature of the air in the washing tank exceeds the second reference value, the water supply is resumed.

A preferred embodiment of the control method of the dish washing machine according to the present invention will be described with reference to FIGS. 2A to 8. First, Figure 2a is a longitudinal sectional view of the dishwasher according to the present invention. As shown in FIG. 2A, a washing tub 204 having a front opening is provided inside the dish washer main body 202, and a door 206 for opening and closing an opening of the washing tub 204 front is provided at the front of the body 202. The hinges are combined. The upper and lower portions of the washing tank 204 are respectively installed so that the baskets 204a for accommodating the dishes slide in the front and rear directions, and spray nozzles 204c are installed at the lower portions of the baskets 204a to spray the washing water onto the dishes. do. In the space provided separately under the washing tank 204, a water collecting tank 208 formed to collect washing water or rinsing water is provided, and the water collecting tank 208 includes a drain pump 210 and a water supply pump 212, respectively. And the circulation pipe 212a. The circulation pipe 212a is connected to the water supply pipe 204b connected to the injection nozzle 204c.

Through this structure, the washing water or the rinsing water sprayed from each spray nozzle 204c is sent to the water supply pipe 204b through the water collecting tank 208 and the circulation pipe 212a by the pumping action of the water supply pump 212 and then again. It is injected through the spray nozzle 204c and circulates inside the washing tank 204. The water supplied into the washing tank 204 is discharged to the outside of the dishwasher 202 by the action of the drain pump 210 after the washing time or the rinsing time elapses.

The door 206 of the dish washing machine according to the present invention is provided with a heater 250 and a blowing fan 254, which are warm air generators for heating and circulating air in the washing tank 204. The air inlet 252a and the air outlet 252c are formed in the surface which faces the washing tank 204 side of the door 206, and this air inlet 252a and the air outlet 252c are communicated through the air pipe 252c. An air inlet 252a inside the blower tube 252b is provided with a blower fan 254 that is rotated by the fan motor 254a, and a heater 250 for heating air is installed in the middle of the blower tube 252b. . When the blowing fan 254 rotates, the air in the washing tank 204 is sucked into the blowing pipe 252b through the suction port 252a. The sucked air is heated by the heater 250 and then supplied to the washing tank 204 again through the tuyeres 252c and circulated.

In the dishwasher according to the present invention, the installation position of the heater 250 and the blowing fan 254 for heating the air in the washing tank 204 is not limited to the inside of the door 206, and the main body of the dishwasher 202. It can be installed anywhere other parts forming the. In addition, a separate case may be mounted on the outside of the main body, and a heater and a blower fan may be installed there.

In addition, one suction port is provided at the inside and the outside of the washing tank 204, respectively, around the door 206, and the air inside the washing tank 204 and the outside of the dish washing machine 202 are heated together, and then the washing tank 204 is provided. Alternatively, the suction port may be formed toward the outside of the dishwasher 202 to suck and heat only the air outside the dishwasher 202 and then supply the inside of the washing tank 204.

Figure 2b is a block diagram showing the configuration of a dish washer according to the present invention. As shown in FIG. 2B, a key input unit 262 and a temperature sensing unit 264 are connected to an input terminal of the controller 260 that controls the overall operation of the dishwasher according to the present invention. The key input unit 262 is for the user to input and set the operating conditions of the dishwasher according to the present invention, the temperature sensor 264 is for measuring the temperature of the air in the washing tank 204.

The water supply and drain valve driver 266, the feed water pump driver 268, the heater driver 270, and the fan driver 272 are connected to the output terminal of the controller 260. The water supply and drain valve driver 266 is for driving the water supply valve 274 and the drain valve 276, and the water supply pump driver 268 and the heater driver 270 respectively supply the water supply pump 212 and the heater 250. It is for driving. The fan driver 272 drives the fan motor 254a to operate the blowing fan 254.

Table 1 below shows possible control operations of the dishwasher according to the present invention.

division ① ② ③ ④ ⑤ Blower fan ON ON ON OFF OFF heater ON ON OFF ON OFF feed pump ON OFF OFF ON ON

Combination Example of Table Control Operation As shown in Table 1, the dishwasher according to the present invention selectively turns on / off the blower fan 254, the heater 250, and the feed water pump 212 to provide various operating characteristics. The operational characteristics of each item shown in Table 1 are as follows.

① When the blower fan 254, the heater 250, and the water feed pump 212 are all operated, the water supplied at the same time as the air inside the washing tank 204 is heated.

② When only the blower fan 254 and the heater 250 operate, since no water is supplied, only the air inside the washing tank 204 is heated.

(3) This is a case where only the blower fan 254 is operated, which corresponds to a case where dry stroke or latent heat of dishes is required.

(4) When only the heater 250 and the feed water pump 212 are operated, the air inside the washing tank 204 does not heat, but only the water to be supplied is heated. To this end, in the dishwasher structure shown in FIG. 2A, at least one of the spray nozzles 204c is directed in the inlet 252a of the blower tube 252b so that water supplied to the washing tank 204 can be supplied into the blower tube 252b. It is preferable to point to).

⑤ When only the feed pump 212 is operated, this is the case where only water is supplied without heating, such as an initial stage of a rinsing stroke or a preliminary washing stroke.

3 is a graph showing the temperature and water supply control characteristics of the dishwasher according to the present invention. As shown in FIG. 3, the air inside the washing tank 204 is continuously circulated while driving the heater 250 until the air temperature inside the washing tank 204 reaches a target temperature (that is, a set temperature). As the air in the washing tank 204 is heated, the dishes are also heated together. As the utensils are heated, the grease on the utensils melts and flows down, which improves the cleaning effect and shortens the cleaning time. When the air temperature inside the washing tank 204 rises to some extent, the washing water is periodically supplied into the washing tank 204. Since the washing water is not continuously supplied, but is supplied intermittently, sufficient time for the air inside the washing tank 204 to be heated can be ensured, and the washing water is also heated by the heated air. The controller 260 may determine the time of supplying the water based on the temperature of the air in the washing tank 204 or the driving time of the heater 250 and the blowing fan 254. That is, the water supply may be started when the temperature of the air in the washing tank 204 reaches a predetermined temperature, or the heater 250 and the blower fan 254 may be driven for a predetermined time and then the water supply may be started. . Alternatively, the driving of the heater 250 and the blowing fan 254 and the water supply may be simultaneously started.

Thus, the heating time of the washing water is lower than that of directly heating the washing water by heating the non-heated air lower than the water first to sufficiently increase the temperature inside the washing tank 204 in a fast time, and then supplying the washing water to be heated by the heated air. Can be shortened. In addition, the dishes in the washing tank 204 are first heated to remove contaminants such as oil in advance, and then the washing water is supplied to shorten the washing time and further increase the washing efficiency. In order to prevent the food waste on the surface of the dish from being dried by the warm air, water may be supplied at the same time as the heating of the air inside the washing tank 204 is started.

4 is a flowchart illustrating a washing method of the dish washing machine according to the present invention. As shown in FIG. 4, preliminary washing is performed to previously remove relatively large ones of the contaminants of the tableware, and the used washing water is discarded (402). Then, in this washing stroke, the blower fan 254 and the heater 250 are turned on to heat the air inside the washing tank 204 (404). When the air in the washing tank 204 is heated to some extent, the washing water is periodically supplied into the washing tank 204 so that the washing water is heated by the heated air (406). If the temperature of the air is 80 ~ 90 ℃ the temperature of the wash water rises to 40 ~ 50 ℃. It is monitored whether the level of the washing water reaches a preset level (407) and the water supply is stopped when the level of the washing water reaches the predetermined level (408). Even when the supply of the washing water is stopped, the blower fan 254 and the heater 250 are continuously driven to heat the air inside the washing tank 204 so that the washing water is heated through the heated air. When the temperature of the washing water reaches the preset temperature (408), when the temperature of the washing water reaches the set temperature, the blower fan 254 and the heater 250 are turned off (410), and the supplied washing water is circulated until then. A wash is performed (412). After the predetermined washing time has elapsed for the main cleaning (414), the washing is stopped and a rinsing stroke is performed (416).

Figure 5 is a flow chart illustrating a rinsing method of the dishwasher according to the present invention, in particular the last rinsing method of the rinsing stroke. As shown in FIG. 5, when the last rinsing step of the rinsing cycle is started, the blower fan 254 and the heater 250 are turned on to heat air in the washing tank 204 (502). When the air temperature inside the washing tank 204 is heated to some extent, the rinsing water is supplied (504). When the rinsing water is supplied, the rinsing water is also heated by the heated air inside the washing tank 204. The rinsing water does not necessarily need to be heated, but the disinfection effect of the dishes can be expected by heating the rinsing water used in the last rinsing step. In addition, when the drying stroke is continuously performed after the rinsing stroke, the drying may be performed faster by the latent heat of the heated dishes. The water level of the rinsing water reaches a preset level (505), and when the level of the rinsing water reaches the set level, the water supply is stopped (506) and the final rinsing step is performed (507). The rinsing time reaches a preset time (508). When the rinsing time reaches a preset time, the blower fan 254 and the heater 250 are turned off (510) and the used rinsing water is discarded (512). When the rinsing stroke is completed, the drying stroke is performed (514).

In the dish washing machine according to the present invention, since the heated air is blown into the washing tank 204, unlike the conventional dish washing machine, a single drying stroke for drying the already washed dishes without accompanying a rinsing stroke using hot water. Can be carried out. In other words, in order to perform only drying of dishes that have already been washed without the rinsing stroke, the existing dishwasher allows the dishes to be heated by rinsing the dishes using hot water before the drying stroke, and then in the drying stroke. The dishes were dried using latent heat of the prepared dishes. In contrast, the dishwasher according to the present invention does not require a dish heating step through rinsing with hot water because the dishware is dried by heated air when the sole drying stroke is performed.

Figure 6 is a graph showing the temperature and water supply control characteristics of the dishwasher according to the present invention, a characteristic curve showing the temperature change in the washing tank of the dishwasher according to the present invention. In FIG. 6, the first section 602 is a temperature curve of water inside the washing tank 204, and the second section 604 is a temperature curve of air. The first section 602 up to the first target temperature T1 is a section in which both the blowing fan 254, the heater 250, and the feed water pump 212 operate. In this section, while supplying water while heating the air inside the washing tank 204, the temperature of the water rises relatively slowly because heat exchange is made between the water and the air. When the temperature of the water in the washing tank 204 reaches the first set temperature T1, the water pump 212 is stopped. Since the supply of water is stopped, the heating of the air by the heater 250 is accelerated so that the temperature of the air reaches the second target temperature T2 for a short time. The second section 604 from t1 to t2 is a section in which only the blowing fan 254 and the heater 250 operate. When the temperature of the air in the washing tank 204 reaches the second target temperature T2, the operation of the feed water pump 212 is resumed. For this reason, the temperature of the air in the washing tank 204 drops rapidly.

The second section 604 is used when a very high temperature is required in a washing or rinsing stroke or the like. For example, cups used by women who use lipstick are left with residues of lipstick. Since the lipstick has a high melting point of 80 ° C. or higher, the washing water must be heated to a high temperature of 80 ° C. or higher, or the temperature around the cup must be heated to 80 ° C. or higher to remove the lipstick on the cup. A relatively long time is required to heat the water in the washing tank 204 to such a high temperature, and heating the air inside the washing tank 204 may allow the water to reach the target temperature faster than when the water is heated. The reason is that the specific heat of air is lower than that of water. Not only lipstick, but also the grease of food is more useful when washing oily dishes because it is more decomposed and removed at high temperatures.

7 and 8 are flowcharts illustrating a control method of the dish washing machine according to the present invention, which shows a control method for obtaining a characteristic curve shown in FIG. 6. First, Figure 7 shows a control method based on the temperature change of the air inside the washing tank. As shown in FIG. 7, the water supply starts in the washing tank 204 at the same time as the washing stroke or the rinsing stroke is started (702). At this time, the water supply pump 212, the heater 250, and the blower fan 254 are all operated so that both the internal air of the washing tank 204 and the water to be supplied are heated (704). When the temperature of the water in the washing tank 204 exceeds the first reference temperature (T _r1 ) (706), the water supply pump 212 is stopped to stop the water supply (708). If only the blower fan 254 and the heater 250 continue to operate and the temperature of the air inside the washing tank 204 exceeds the second reference temperature T _r2 (710), the operation of the water feed pump 212 resumes and the washing tank ( The water is supplied to 204 to wash the dishes. At this time, since the dishes inside the washing tank 204 are sufficiently heated by the air heated to a high temperature, lipsticks or oils having a high melting point can be easily removed. Thereafter, when the predetermined stroke time for the washing stroke or the rinsing stroke elapses, the corresponding stroke is terminated (714).

8 shows a control method based on the progress time of each stroke. As shown in FIG. 8, water supply starts in the washing tank 204 at the same time as the washing stroke or the rinsing stroke is started (802). At this time, the water supply pump 212, the heater 250, and the blower fan 254 are all operated so that both the internal air of the washing tank 204 and the water to be supplied are heated (704). When the first reference time t _r1 is exceeded from the start of the washing / rinsing stroke (806), the water supply pump 212 is stopped and the water supply is stopped (808). If only the blower fan 254 and the heater 250 continue to operate and the temperature of the air inside the washing tank 204 exceeds the second reference time t _r2 (810), the operation of the feed pump 212 resumes and the washing tank ( The water is supplied to 204 to wash the dishes. Thereafter, when the predetermined stroke time for the washing stroke or the rinsing stroke elapses, the corresponding stroke is terminated (714). That is, the control method shown in FIG. 7 performs each stroke on the basis of the temperature change, but the control method shown in FIG. 8 performs each stroke on the basis of the required time. At this time, the two reference times (t _r1 , t _r2 ) are conducted several times in the product development stage and use the average value of the time taken to reach the two reference temperatures (T _r1 , T _r2 ) in each experiment. .

The dishwasher according to the present invention configured as described above supplies the washing water while simultaneously heating the air inside the washing tank 204 in the washing stroke to heat the dishes and washing water inside the washing tank 204 through the heated air. The air inside the washing tank 204 is continuously circulated while driving the warm air generator until the air temperature inside the washing tank 204 reaches a target temperature (that is, a set temperature). As the air in the washing tank 204 is heated, the dishes are also heated together. As the dishes are heated, the oil and other oils on the dishes melt and flow down, which not only improves the cleaning effect but also greatly shortens the cleaning time.

Thus, the heating time of the washing water is lower than that of directly heating the washing water by heating the non-thermal air lower than the water first to sufficiently increase the temperature inside the washing tank 204 in a fast time, and then supplying the washing water to heat the washing water by the heated air. Can be shortened. In addition, the dishes in the washing tank 204 are first heated to remove contaminants such as oil in advance, and then the washing water is supplied to shorten the washing time and further increase the washing efficiency. In order to prevent the food waste on the surface of the dish from being dried by the warm air, water may be supplied at the same time as the heating of the air inside the washing tank 204 is started.

The dishwasher according to the present invention may shorten the washing time by heating the low specific heat air in the washing tank first, and heating the dish water, the washing water, and the rinsing water by using the heated air. In addition, it is possible to increase the energy consumption efficiency by a single drying stroke that does not involve a hot water rinse stroke, and since the heater is not submerged in water, limestone does not adhere to the heater surface, thereby greatly extending the life of the heater.

Claims (27)

In the control method of the dishwasher provided with a washing tank, Heating air in the wash bath; Supplying water into the washing tank; And a hot water is generated through heat exchange between the heated air and the supplied water. The method of claim 1, Control method of the dishwasher to supply the water periodically when the air in the washing tank is heated above a predetermined temperature. The method of claim 1, An air heating step in the washing tank is performed at each initial stage of the washing stroke and the rinsing stroke; The control method of the dish washing machine which performs the said washing stroke and the rinse stroke, respectively using the said hot water. The method of claim 3, wherein The rinsing stroke consists of at least two rinsing steps; Controlling the dishwasher to rinse the dishes using the hot water in the last rinsing step of the at least two rinsing steps. The method of claim 1, The control method of the dishwasher to circulate the air in the washing tank through the pipe, and to heat the air circulated through the pipe. The method of claim 5, wherein Continuously circulating air in the washing bath and heating until reaching a first temperature; And when the temperature of the air in the washing tank reaches the first temperature, periodically supplying the water to the washing tank. The method of claim 6, And controlling the dishwasher to supply the washing water periodically when the temperature of the air in the washing tank reaches a preset temperature or when the heater and the blower fan are operated for a preset time. The method of claim 1, And controlling the heat exchange between the heated air and the water supplied to the washing tank when the air generator operates for a predetermined reference time or more so that the water supplied to the washing tank is heated. The method of claim 1, And controlling the heat exchange between the heated air and the water supplied to the washing tank so that the water supplied to the washing tank is heated as soon as the air generator is operated. The method of claim 1, wherein the heating of the air, Controlling the dishwasher to heat the air by sucking outside air into the washing tank or recirculating the air in the washing tank. The method of claim 1, wherein the supply of water, The control method of the dishwasher to supply the water intermittently when the temperature of the air in the washing tank rises to the first temperature so that the water in the washing tank is heated by the heated air. The method of claim 1, wherein the supply of water, The control method of the dishwasher to supply the water periodically when the air in the washing tank is heated above a predetermined reference temperature. The method of claim 1, The control method of the dishwasher which heats the air in the said washing tank at the beginning of a rinsing stroke. The method of claim 1, The control method of the dishwasher to rinse dishes using the heated water in the rinsing stroke. The method of claim 14, The control method of the dishwasher which performs the said rinsing stroke at least twice. The method of claim 1, And drying the dishes using only the air heated through the heating of the air. In the control method of the dishwasher provided with a washing tank, Heating air in the wash bath; Supplying water to the washing tank; Circulating the heated air through a heat exchange between the heated air and the water to be supplied; A method of controlling a dishwasher for washing dishes using heated water. In the dishwasher provided with a washing tank, And an air generating device for heating the air to heat the water in the washing tank through heat exchange between the water supplied to the washing tank and the heated air, wherein the air has a specific temperature lower than the temperature of the water. In the control method of the dishwasher provided with a washing tank, Heating air in the wash bath; Supplying water to the washing tank; Circulating the heated air through heat exchange between the heated air and the water to be supplied; The method of claim 1, wherein the air has a specific temperature lower than the temperature of the water. In the control method of the dishwasher provided with a washing tank, Heating air in the washing bath; Control method of the dishwasher to dry the dishes in the washing tank using only the heated air. In the control method of the dishwasher provided with a washing tank, Heating air in the washing bath using a heater; Supplying water to the washing tank and generating hot water through heat exchange between the heated air and the water supplied to the washing tank, wherein the heater is not submerged in the water supplied to the washing tank. In the control method of the dishwasher equipped with a washing tank and a warm air generating device for supplying warm air to the washing tank, Starting water supply in the washing tank; Operating the warm air generator to heat both the water to be supplied and the air inside the washing tank; Stopping water supply and operating only the warm air generating device when the preset internal environment variable of the washing tank exceeds a first reference value; And supplying water when the preset internal environment variable of the washing tank exceeds a second reference value. The method of claim 22, The control method of the dishwasher which starts the said water supply at the same time as any one of a washing | cleaning stroke and a rinsing stroke is started. The method of claim 22, The first reference value is a temperature of water in the washing tank; And a second reference value is a temperature of air in the washing tank. The method of claim 22, The first reference value is 60 ℃ control method of the dishwasher. The method of claim 22, The first reference value is an average time taken for the temperature of the water in the washing tank to reach a preset temperature; And the second reference value is an average time taken until the temperature of the air inside the washing tank reaches a preset temperature. The method of claim 26, The first reference value ranges from 15 to 25 minutes; The control method of the dishwasher having the second reference value ranges from 5 to 10.