JPH06233737A - Dishwasher - Google Patents

Abstract

PURPOSE:To prevent the high flow rate of hot water at the high temperature from flowing, to prevent a nozzle of dishes from being damaged, to miniaturize the dishwasher with simple configuration, to reduce cost and to stabilize the rinsing ability of clean water. CONSTITUTION:This dishwasher for washing dishes by connecting a washing water duct for supplying hot water to a nozzle 4 is provided with a detection part 23 provided in the washing water duct 8 so as to detect the flow rate or pressure and a control part 14 for selecting either of or both of a temperature adjusting duct 26 and a bypass duct 24 as the supplying path of hot water based on the detected information of this detection part 23. Further, the dishwasher for washing dishes by connecting the washing water duct 8 for supplying hot water to the nozzle 4 is provided with the detection part 23 provided in the washing water duct 8 so as to detect the flow rate or pressure and the control part 14 also for changing the ratio of mixing hot water and cold water at a hot flow adjusting part 7 based on the detected information of this detection part 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher in which a rinsing nozzle is connected to a water supply pipe and a hot water supply pipe.

[0002]

2. Description of the Related Art In a conventional dishwasher, a water supply pipe and a hot water supply pipe are either directly connected to a nozzle or directly connected to a nozzle via a tank without considering conditions such as water pressure and hot water supply equipment.

[0003]

Therefore, a large amount of hot and cold water flows, which causes breakage of the nozzle and malfunction such as rotation failure. Further, since high-temperature water is directly supplied, tableware made of glass, resin or the like may be destroyed.
Further, in order to eliminate these inconveniences, when a tank storing hot water having an appropriate temperature is installed, there are inconveniences such as an increase in equipment cost and an increase in required space. Furthermore,
When water and hot water were supplied at the same time as other equipment, sufficient water pressure could not be obtained, and poor rinsing had occurred.

[0004]

In order to solve the above problems, the present invention is a dishwasher for washing dishes by connecting a washing water pipe for supplying hot water to a nozzle, and a flow rate provided in the washing water pipe, Alternatively, a detection unit for detecting the pressure and a control unit for selecting one or both of the temperature control flow path and the bypass flow path as the hot water supply path based on the detection information by the detection section are provided. Further, in a dishwasher for washing dishes by connecting a washing water pipe supplying hot water to a nozzle, a detection unit provided in the washing water pipe for detecting a flow rate or pressure, and a detection unit based on the detection information A control unit for changing the mixing ratio of hot and cold water in the temperature adjustment unit is provided.

[0005]

According to the above means, in the rinsing process with cleaning water, when the detection unit detects the shortage of the set flow rate (pressure) at the initial set temperature, the control unit opens the bypass passage of the water supply pipe to set the set temperature. The set flow rate is secured preferentially to the process, and the process proceeds. If the set flow rate (pressure) is insufficient even in this process, both the bypass passage of the water supply pipe and the temperature adjusting passage are closed, and the temperature adjusting passage is opened after waiting for the set time. By repeating these two strokes, the rinsing stroke for the set time is performed only when the set flow rate is secured. Even when a shortage of the set flow rate is detected during the progress of the rinsing process, the same control is performed and the rinsing cleaning is performed for the set time in the total time.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the dishwasher of the present invention will be described with reference to the attached drawings. FIG. 1 is a schematic configuration diagram of a dishwasher of the present invention. The dishwasher 1 includes an upper basket 3 for placing dishes in a washing tank 2, an upper washing nozzle 4 facing the upper basket 3, and a lower basket for placing dishes as well. 5, the lower cleaning nozzle 6 facing the lower basket 5 is arranged from the top to the bottom. The upper cleaning nozzle 4 and the temperature adjustment unit 7 outside the cleaning tank 2 are connected by a cleaning water pipe line 8, and the upper cleaning nozzle 4 and the lower cleaning nozzle 6 are connected by a circulation line 9 to a water reservoir 11 described later, A pump 10 is provided in the circulation path 9 near the water reservoir 11. The water reservoir 11 is formed in the lower portion of the cleaning tank 2, and the water accumulated in the water reservoir 11 is guided to the circulation path 9.

In the temperature control / flow control section 7, water from a water supply pipe 12 such as a water supply and hot water obtained by heating the water from the water supply pipe 12 with a water heater 13 are mixed at an appropriate temperature. The mixing ratio of this hot water and water is set so that the temperature of the washing water becomes 60 ° C. In addition, 15 is water heat
Reference numeral 16 is an air heater, and 17 is a fan.

Next, referring to FIG. 2, a first embodiment of the temperature regulation / flow regulation section 7 and the control section 14 will be described. The temperature regulation unit 7 includes a constant flow valve 18 (or pressure reducing valve) and a fixed temperature regulation valve 19,
Hot water supply pipe 20 and water supply pipe 21 connected to the fixed temperature control valve 19
Among them, the hot water supply pipe 20 is provided with a check valve 22. Further, the wash water conduit 8 is provided with a detector 23 for detecting the flow rate or pressure of the wash water conduit 8. The detection information from the detection unit 23 is transmitted to the control unit 14 to open / close the electromagnetic valve 25 of the bypass flow path 24. The bypass flow path 24 is used for the water supply pipe 2
1 is connected to the temperature control flow path 26 that bypasses the fixed temperature control valve 19 and connects the fixed temperature control valve 19 and the constant flow valve 18, so that the control unit 14 opens and closes the electromagnetic valve 25 to supply the cleaning water. As the passage, either the temperature adjusting passage 26 alone or both the bypass passage 24 and the temperature adjusting passage 26 can be selected. As a result, it is possible to prevent the excessive inflow of high-temperature water by changing the mixing ratio of hot and cold water, and to prevent the tableware from being damaged. Similarly, the detection information transmitted to the control unit 14 is
The solenoid valve 27 of the washing water conduit 8 can be opened and closed to adjust the supply of washing water to the upper washing nozzle 4. Also, constant flow valve 1
By 8, it is possible to prevent a large flow rate from flowing and prevent the nozzle 4 from being damaged. Incidentally, 28 and 29 are check valves.

Next, the operation of the first embodiment will be described. The dirty tableware after use is first put in the upper basket 3 and the lower basket 5 of FIG. 1, and the hot and cold water stored in the water reservoir 11 of the cleaning tank 2 is circulated by the pump 10 so that the upper and lower cleaning nozzles 4, Spray from No. 6 and perform underwash and main wash. When the injection for a predetermined time is completed, the control unit 14 operates and the pump 10 automatically stops, and the process of rinsing with the wash water from the water pipe 12 starts.

The next process of rinsing with cleaning water is started by opening the solenoid valve 27 of the cleaning water conduit 8 after the main cleaning process is completed (STEP 1), as shown in the flow chart 3 of FIG. 3 ( STEP 2). Here, when the detection unit 23 detects a shortage of the set flow rate (pressure) at the initial set temperature (ST
EP3), the controller 14 controls the bypass passage 24 of the water supply pipe 21.
Open the solenoid valve 25 (STEP 4) to fix the fixed temperature control valve 19
The set flow rate is secured preferentially over the set temperature of (STEP
5), the rinsing process proceeds for a predetermined time by the timer (STEP6, STEP7) (STEP8, 9). If the set flow rate (pressure) is sufficient at the initial set temperature, STEP
The process proceeds from 3 to STEP 6 as it is.

In STEP 5, if the set flow rate (pressure) is insufficient, the timer is temporarily stopped (STEP 5
11), the solenoid valve 25 of the bypass passage 24 of the water supply pipe 21
And both solenoid valves 27 of the cleaning water pipe 8 are closed (STE
P12), after waiting for the set time (STEP 13), the solenoid valve 27 of the washing water conduit 8 is opened (STEP 2).

The rinsing process consists of the above steps. Only when the set flow rate is secured by repeating this process, the dishes in the upper basket 3 and the lower basket 5 are rinsed by the upper cleaning nozzle 4 for the set time. Even if the insufficient flow rate is detected during the rinsing process (STEP 10), the above-mentioned STEP
The same control is performed thereafter, and rinsing and cleaning are performed until the total time satisfies the set time. Incidentally, the timer becomes a pose during the waiting time.

Next, based on FIG. 4, the temperature control / flow control section 7 and the control section 1
A second embodiment of No. 4 will be described. Temperature regulation unit 7 of the second embodiment
Is provided with a fixed temperature control valve 19 and a flow control opening / closing valve 30 connected to the fixed temperature control valve 19 through a temperature control flow path 26. A hot water supply pipe 20 and a water supply pipe 21 are connected to the fixed temperature control valve 19, and the water supply pipe 21 and the temperature control flow passage 26 are connected by a bypass flow passage 24 provided with a solenoid valve 25. Also, the flow control on-off valve 3
The washing water pipe 8 connecting the nozzle 0 and the nozzle 4 is provided with a detector 23 for detecting the flow rate or pressure of hot water. The detection information is transmitted to the control unit 14, and the control unit 14 opens and closes the flow control on-off valve 30 to control the set flow rate.

Next, the rinsing process of the second embodiment will be described with reference to the flowchart of FIG. When the step of main cleaning is completed (STEP 1), the rinse step with tap water subsequently starts (STEP 2). The opening degree of the flow control on-off valve 30 is adjusted (STEP 3), and the flow control on-off valve 30 is fully opened (STE).
In P4), the detection unit 23 detects the shortage of the set flow rate (S
TEP5) and the control unit 14 open the electromagnetic valve 25 of the bypass passage 24 based on this detection information (STEP6),
Water is supplied from the water supply pipe 21 to lower the temperature of the cleaning water, and the set flow rate supplied from the cleaning water pipe 8 to the upper cleaning nozzle 4 is secured preferentially (STEP 7). Or flow control on-off valve 3
Even if 0 is not fully opened, if the set flow rate is secured (STEP 8), actual rinsing starts (STEP 8).
9), by the start of the timer (STEP 10),
Rinsing is performed for a predetermined time (STEP 11, STE
P12). In this way, the rinsing process proceeds.

When the set flow rate of the washing water pipe 8 cannot be secured in STEP 7, the detection unit 23 detects this and temporarily stops the timer (STEP 14), and the control unit 14 causes the flow control on-off valve 30 and the solenoid valve. 25 together (STEP1
5) After waiting for the set time (STEP 16), the flow control on-off valve 30 is opened to secure the flow rate (STEP 2). Only when the set flow rate is ensured by repeating the above, the rinsing process proceeds. Also, when a shortage of the flow rate is detected during the progress of the rinsing process (STEP 13), the process is connected to the above-mentioned STEP 14, and the same control is performed thereafter, and the rinsing process with cleaning water is performed until the total time satisfies the set time.

FIG. 6 shows a third embodiment of the temperature control / flow control section 7 and the control section 14. In the third embodiment, as shown in FIG. 6, the temperature regulation unit 7 comprises a fixed temperature regulation valve 19 and a constant flow valve 18 (or a pressure reducing valve), and a three-way switching to a temperature regulation passage 26 connecting them. A valve 31 is provided, and the three-way switching valve 31 is connected to a bypass flow passage 24 that bypasses the fixed temperature control valve 19 from the water supply pipe 21. Further, a detection unit 23 is provided in the washing water pipe line 8 that connects the constant flow valve 18 and the nozzle 4. The detection information of the detection unit 23 is transmitted to the control unit 14 to switch the three-way switching valve 31,
A temperature-regulating regular NO temperature control channel 26,
Alternatively, either the bypass flow path 24 side NC to which water is directly supplied is selected.

Next, the rinsing process according to the third embodiment will be described with reference to the flow chart of FIG. The process of rinsing with cleaning water is performed after the process of main cleaning is completed (STEP 1).
Starting, the solenoid valve 27 is opened (STEP 2). Here, when the detection unit 23 detects a shortage of the set flow rate (pressure) at the initial set temperature (STEP 3), the control unit 14 causes the three-way switching valve 31 to move from the regular temperature control flow path to the bypass flow path 2
Switch to 4 (STEP 4). That is, the set flow rate is preferentially secured over the set temperature (STEP 5), the timer (STEP 6, STEP 7) is used, and the rinsing process proceeds for a predetermined time (STEP 8, 9). When the set flow rate (pressure) is sufficient at the initial set temperature, the process proceeds from STEP 3 to STEP 6 as it is.

In STEP 5, if the set flow rate (pressure) is insufficient, the timer is temporarily stopped (STEP 1
1), the solenoid valve 27 is closed, and the three-way switching valve 31 is switched from the bypass side to the regular side (STEP 12). After waiting for the set time (STEP 13), the solenoid valve 27 is opened (STEP 2).

The rinsing process consists of the above steps, and only when the set flow rate is secured by repeating this process, the rinsing of the dishes in the upper basket 3 and the lower basket 5 by the upper cleaning nozzle 4 is performed for the set time. When a shortage of the flow rate is detected during the rinsing process (STEP 10), it is connected to STEP 11, and the same control is performed thereafter, and rinsing and cleaning are performed until the total time satisfies the set time.

FIG. 8 shows a fourth embodiment of the temperature control / flow control section 7 and the control section 14. In the fourth embodiment, as shown in FIG. 8, the temperature control / flow control section 7 includes a fixed temperature control valve 19, a three-way switching valve 31 (or two opening / closing valves) and a flow control in the washing water pipe line 8 on the downstream side. An on-off valve 30 is provided. The three-way switching valve 31 is connected to a bypass passage 24 that bypasses the fixed temperature control valve 19 from the water supply pipe 21. Further, the wash water pipe 8 further downstream of the flow control on-off valve 30.
A detection unit 23 and a check valve 29 are provided in the, and are connected to the nozzle 4. The detection information of the detection unit 23 is the control unit 14
Then, the three-way switching valve 31 is switched to select either the temperature-regulated regular temperature control passage 26 or the bypass passage 24 to which water is supplied as it is.

Next, based on the flowchart of FIG.
The rinsing process of the embodiment will be described. When the step of main cleaning is completed (STEP 1), the rinse step with tap water subsequently starts (STEP 2). The opening degree of the flow control on-off valve 30 is adjusted (STEP 3), and the flow control on-off valve 30 is fully opened (S
In TEP4), when the detection unit 23 detects the shortage of the set flow rate (STEP5), the control unit 14 switches the three-way switching valve 31 from the regular side NO to the bypass flow path 24 side NC based on the detection information (STEP6). ), Water is supplied from the water supply pipe 21 to lower the temperature, and the set flow rate supplied from the cleaning water pipe line 8 to the upper cleaning nozzle 4 is secured preferentially (S).
TEP7). Alternatively, even if the flow control valve 30 is not fully opened, if the set flow rate is secured (STEP 8), the actual rinsing starts (STEP 9) and the timer starts (STEP 10) to perform rinsing for a predetermined time. (STEP 11, STEP 12). In this way, the rinsing process proceeds.

When the set flow rate of the washing water pipe 8 cannot be secured in STEP 7, the detection unit 23 detects this and the control unit 14 closes the flow control on-off valve 30 and sets the three-way switching valve 31 to the regular flow NO. Switch. Standby for set time (STEP1
After 6), the flow control valve 30 is opened to secure the flow rate (ST
EP2). Then, rinsing for a predetermined time is performed. Only when the set flow rate is ensured by repeating the above, the rinsing process proceeds. Also, when a shortage of the flow rate is detected during the progress of the rinsing process (STEP 13), the process is connected to the above-mentioned STEP 14, and the same control is performed thereafter, and the rinsing process with cleaning water is performed until the total time satisfies the set time.

FIG. 10 shows a fifth part of the temperature control / flow control section 7 and the control section 14.
An example is shown. The fifth embodiment is a partial modification of the third embodiment. The difference from the third embodiment is that the temperature control channel 2
In place of the three-way switching valve 31 provided in 6, two solenoid valves 25,
32 is provided and is controlled by the control unit 14. The control unit 14 appropriately opens and closes both the electromagnetic valve 25 of the bypass flow channel 24 and the electromagnetic valve 32 of the temperature control flow channel 26 according to the detection information regarding the flow rate or the pressure of the cleaning water pipeline 8 from the detection unit 23. Therefore, it is possible to perform more various controls than those of the above-described embodiments. Therefore, it is particularly suitable for washing fragile dishes or the like that are delicate with respect to hot water temperature and hot water pressure.

Next, the rinsing process of the fifth embodiment will be described with reference to the flowchart of FIG. After the main cleaning process is completed (STEP 1), the rinsing process is started by opening the solenoid valve 32 of the temperature control flow path 26 (STEP 1).
2). Here, when the detection unit 23 detects a shortage of the set flow rate (pressure) at the initial set temperature (STEP 3), the control unit 14 opens the electromagnetic valve 25 of the bypass flow passage 24 of the water supply pipe 21 to open the electromagnetic valve of the temperature control flow passage 26. Close the valve 32 (STEP 4),
Securing the set flow rate preferentially over the set temperature (STEP
5), the rinsing process proceeds for a predetermined time by the timer (STEP6, STEP7) (STEP8, 9). If the set flow rate (pressure) is sufficient at the initial set temperature, STEP
The process proceeds from 3 to STEP 6 as it is.

Even in STEP 5, if the set flow rate (pressure) is insufficient, the timer is temporarily stopped (STEP 5
11), both the electromagnetic valve 25 of the bypass flow path 24 and the electromagnetic valve 32 of the temperature control flow path 26 are closed (STEP 12),
After waiting for a set time (STEP 13), the temperature control flow path 26
The solenoid valve 32 is opened (STEP 2). In this embodiment, the temperature control channel 26 and the bypass channel 24 are simultaneously supplied between the temperature control channel 26 only (STEP 2) and the bypass channel only (STEP 4). Is possible. By doing so, it is possible to obtain three stages of washing water temperature and prevent washing with water as much as possible.

The rinsing process consists of the above steps, and only when the set flow rate is secured by repeating this process, rinsing the dishes in the upper basket 3 and the lower basket 5 by the upper cleaning nozzle 4 is performed for the set time. Even when the insufficient flow rate is detected during the rinsing process (STEP 10), the above STEP 1
After that, the same control is performed, and rinsing and cleaning are performed until the total time satisfies the set time. As described above, in the first to fifth embodiments, there is one fixed temperature control valve 19 in the temperature control and flow control section 7, and in the following sixth to tenth embodiments, the temperature control and flow control section 7 is used. Equipped with two fixed temperature control valves.

FIG. 12 shows a sixth part of the temperature control / flow control section 7 and the control section 14.
An example is shown. The sixth embodiment has two fixed temperature control valves of the first embodiment. That is, the hot water supply pipes 20 and the downstream sides of the water supply pipes 21 are branched respectively, and fixed temperature control valves 19 and 33 are provided in parallel, and the hot water supply pipes 20 on the upstream side of the fixed temperature control valves 19 and 33 are respectively connected with check valves. Valves 22 and 34 are provided. The bypass flow path 24 on the downstream side of the fixed temperature control valve 33 has the fixed temperature control valve 1
9, a solenoid valve 25 is provided in the bypass flow path 24, and a check valve 28 is provided in the temperature control flow path 26. The two fixed temperature control valves 19 and 33, the electromagnetic valve 25, and the constant flow valve (pressure reducing valve) 18 on the downstream side of the temperature control flow path 26 constitute the temperature control / flow control unit 7. The fixed temperature control valve 19 flows hot water of about 60 ° C (high temperature setting) to the downstream side, and the fixed temperature control valve 33 of about 30 ° C to 40 ° C (low temperature setting).
It is set so that the hot water of No. 1 flows downstream.

A detector 23, a check valve 29, and a solenoid valve 27 are provided in the wash water pipe 8 downstream of the constant flow valve 18, and are connected to the nozzle 4. The detection unit 23 detects the flow rate or pressure of the cleaning water pipe line 8 and transmits the detection information to the control unit 14, and the control unit 14 opens / closes the electromagnetic valve 25 of the bypass flow passage 24. By opening / closing the solenoid valve 25, it is possible to select either only the temperature control channel 26 or both the bypass channel 24 and the temperature control channel 26 as the hot and cold water supply channel. This can prevent excessive inflow of high-temperature water and prevent damage to dishes. Similarly, the detection information transmitted to the control unit 14 enables the electromagnetic valve 27 of the washing water conduit 8 to be opened and closed to adjust the supply of washing water to the upper washing nozzle 4. Further, it is possible to prevent a large flow rate from flowing by the constant flow rate valve 18 and prevent the nozzle 4 from being damaged.

Next, the rinsing process of the sixth embodiment will be described with reference to the flowchart of FIG. After the main cleaning process is completed (STEP 1), the solenoid valve 2 of the cleaning water pipe line 8
The rinsing process starts by opening 7 (STEP 2).
Here, when the detection unit 23 detects the shortage of the set flow rate (pressure) at the initial set temperature (STEP 3), the control unit 14 opens the solenoid valve 25 of the bypass passage 24 of the water supply pipe 21 (STE).
P4), the set flow rate is secured preferentially over the set temperature (S
TEP5), by timer (STEP6, STEP
7) The rinsing process proceeds for a predetermined time (STEP8,
9). When the set flow rate (pressure) is sufficient at the initial set temperature, the process proceeds from STEP 3 to STEP 6 as it is.

In STEP 5, if the set flow rate (pressure) is insufficient, the timer is temporarily stopped (STEP 5
11), both the electromagnetic valve 25 of the bypass flow path 24 and the electromagnetic valve 27 of the cleaning water pipeline 8 are closed (STEP 12), after waiting for a set time (STEP 13), the electromagnetic valve 27 of the cleaning water pipeline 8 is opened (STEP 2). ).

The rinsing step consists of the above steps, and only when the set flow rate is secured by repeating this step, rinsing the dishes in the upper basket 3 and the lower basket 5 by the upper cleaning nozzle 4 is performed for the set time. Even if the insufficient flow rate is detected during the rinsing process (STEP 10), the above-mentioned STEP
Then, the same control is performed, and rinsing and cleaning are performed until the total time satisfies the set time.

Next, a seventh embodiment of the temperature control / flow control section 7 and the control section 14 will be described with reference to FIG. The seventh embodiment has two fixed temperature control valves of the second embodiment. That is, hot water supply pipe 2
0 and the downstream side of the water supply pipe 21 are branched respectively to provide fixed temperature control valves 19 and 33 in parallel, and the fixed temperature control valves 19 and 33 are respectively provided.
Check valves 22 and 34 are provided on the hot water supply pipe 20 on the upstream side, respectively. Bypass flow path 24 on the downstream side of the fixed temperature control valve 33
Is connected to the temperature control flow path 26 on the downstream side of the fixed temperature control valve 19, and the bypass flow path 24 includes an electromagnetic valve 25 and a temperature control flow path 26.
Is provided with a check valve 28. These two fixed temperature control valves 1
The temperature control flow control unit 7 is configured by 9, 33, the solenoid valve 25, and the flow control opening / closing valve 30 on the downstream side of the temperature control flow path 26. The fixed temperature control valve 19 is set so that hot water of about 60 ° C. (high temperature setting) is made to flow downstream, and the fixed temperature control valve 33 is set so that hot water of about 30 ° C. to 40 ° C. (low temperature setting) is made to flow downstream.

A detector 23 and a check valve 29 are provided in the washing water pipe 8 on the downstream side of the flow control valve 30 and connected to the nozzle 4. The detection unit 23 detects the flow rate or pressure of the wash water pipe line 8 and transmits the detection information to the control unit 14, and the control unit 14 controls the electromagnetic valve 25 of the bypass flow path 24 and the flow control of the temperature control flow path 26. The on-off valve 30 is opened and closed. By opening and closing the solenoid valve 25 and the flow control opening / closing valve 30, either the temperature control flow path 26 alone or both the bypass flow path 24 and the temperature control flow path 26 can be selected as the hot and cold water supply path. This can prevent excessive inflow of high-temperature water and prevent damage to dishes. Further, it is possible to prevent a large flow rate from flowing into the cleaning water pipe line 8 and prevent the nozzle 4 from being damaged.

Next, the rinsing process of the seventh embodiment will be described with reference to the flowchart of FIG. When the step of main cleaning is completed (STEP 1), the rinse step with tap water subsequently starts (STEP 2). The opening degree of the flow control on-off valve 30 is adjusted (STEP 3) and the flow control on-off valve 30 is fully opened (STEP 3).
In EP4), when the detection unit 23 detects the shortage of the set flow rate of the wash water conduit 8 (STEP5), the control unit 14 opens the solenoid valve 25 of the bypass flow path 24 based on the detection information (STEP6), From the fixed temperature control valve 33 to low temperature (30 ℃ ~ 4
(0 ° C.) hot water is supplied to lower the wash water temperature, and the set flow rate supplied from the wash water conduit 8 to the upper wash nozzle 4 is secured preferentially (STEP 7). Alternatively, in STEP 4, even if the flow control on-off valve 30 is not fully opened, if the set flow rate is secured (STEP 8), actual rinsing starts (STEP 9) and the timer starts (STE).
Rinse for a predetermined time is performed (P10) (STEP1).
1, STEP 12). In this way, the rinsing process proceeds.

When the set flow rate of the cleaning water pipe 8 cannot be secured in STEP 7, the detection unit 23 detects this and temporarily stops the timer, and the control unit 14 closes both the flow control on-off valve 30 and the solenoid valve 25. After waiting for the set time (STEP 16), the flow control on-off valve 30 is opened to secure the flow rate (STEP 16).
2). Then, rinsing for a predetermined time is performed. Only when the set flow rate is ensured by repeating the above, the rinsing process proceeds. Also, when a shortage of the flow rate is detected during the rinsing stroke (STEP 13), it is connected to the S hand P14,
After that, the same control is performed, and a rinsing process with cleaning water is performed until the total time satisfies the set time.

FIG. 16 is an eighth view of the temperature control / flow control section 7 and the control section 14.
An example is shown. The eighth embodiment has two fixed temperature control valves of the third embodiment. That is, the hot water supply pipes 20 and the downstream sides of the water supply pipes 21 are branched respectively, and fixed temperature control valves 19 and 33 are provided in parallel, and the hot water supply pipes 20 on the upstream side of the fixed temperature control valves 19 and 33 are respectively connected with check valves. Valves 22 and 34 are provided. The bypass flow path 24 on the downstream side of the fixed temperature control valve 33 has the fixed temperature control valve 1
9 is connected to the temperature control flow path 26 on the downstream side, and a three-way switching valve 31 is provided at this connection. The two fixed temperature control valves 19, 33, the three-way switching valve 31, and the constant flow valve (pressure reducing valve) 18 on the downstream side of the temperature control flow path 26 constitute the temperature control flow control unit 7. The fixed temperature control valve 19 flows hot water of about 60 ° C. (high temperature setting) to the downstream side, and the fixed temperature control valve 33 sets 3
It is set so that hot and cold water at 0 ° C to 40 ° C (low temperature setting) is made to flow downstream.

A detector 23 is provided in the washing water pipe 8 connecting the constant flow valve 18 and the nozzle 4. The detection information of the detection unit 23 is transmitted to the control unit 14 to switch the three-way switching valve 31 to control the temperature of the regular side NO temperature control passage 2.
6 or the fixed temperature control valve 33 of the NC on the bypass flow path 24 side is selected.

Next, the rinsing process according to the eighth embodiment will be described with reference to the flowchart of FIG. The process of rinsing with cleaning water is performed after the process of main cleaning is completed (STEP
1) It is started by opening the solenoid valve 27 of the washing water conduit 8 (STEP 2). Here, if the detection unit 23 detects a shortage of the set flow rate (pressure) at the initial set temperature (STEP 3),
The control unit 14 sets the three-way switching valve 31 in FIG. 16 to the regular side N
The temperature control channel of O is switched to the NC on the side of the bypass channel 24, and low-temperature hot water of 30 ° C to 40 ° C from the fixed temperature control valve 33 is caused to flow (STEP 4). That is, the set flow rate is secured with priority over the set temperature (STEP 5), and the timer (ST
The rinsing process proceeds for a predetermined time (EP6, STEP7) (STEP8, 9). Set flow rate (pressure) at initial set temperature
Is sufficient, the process proceeds from STEP 3 to STEP 6 as it is.

Even in STEP 5, if the set flow rate (pressure) is insufficient, the timer is temporarily stopped (STEP 5
11), the solenoid valve 27 is closed and the three-way switching valve 31 is switched from the bypass side NC to the regular side NO (STEP 1).
2). After waiting for the set time (STEP 13), the solenoid valve 27
Open (STEP2).

The rinsing step consists of the above steps, and only when the set flow rate is secured by repeating this step, the dishes in the upper basket 3 and the lower basket 5 are rinsed by the upper cleaning nozzle 4 for the set time. Even when the insufficient flow rate is detected during the rinsing process (STEP 10), the above STEP 1
After that, the same control is performed, and rinsing and cleaning are performed until the total time satisfies the set time.

FIG. 18 shows the temperature control / flow control section 7 and the ninth section of the control section 14.
An example is shown. The ninth embodiment has two fixed temperature control valves of the fourth embodiment. That is, the hot water supply pipes 20 and the downstream sides of the water supply pipes 21 are branched respectively, and fixed temperature control valves 19 and 33 are provided in parallel, and the hot water supply pipes 20 on the upstream side of the fixed temperature control valves 19 and 33 are respectively connected with check valves. Valves 22 and 34 are provided. The bypass flow path 24 on the downstream side of the fixed temperature control valve 33 has the fixed temperature control valve 1
9 is connected to the temperature control flow path 26 on the downstream side, and a three-way switching valve 31 (or two open / close valves in each of the parallel flow paths) is connected to this connection portion.
Is provided. And these two fixed temperature control valves 19, 3
3, the three-way switching valve 31, and the flow control on-off valve 30 on the downstream side of the three-way switching valve 31 constitute the temperature control flow control unit 7. The fixed temperature control valve 19 is set so that hot water of about 60 ° C. (high temperature setting) is made to flow downstream, and the fixed temperature control valve 33 is set so that hot water of about 30 ° C. to 40 ° C. (low temperature setting) is made to flow downstream.

A detector 23 and a check valve 29 are provided in the wash water pipe 8 further downstream of the flow control valve 30 and are connected to the nozzle 4. The detection information of this detection unit 23 is the control unit 1
4, the three-way switching valve 31 is switched to select either the temperature-regulated regular NO temperature adjusting passage 26 or the bypass passage 24 side NC fixed temperature regulating valve 33.

Next, the rinsing process according to the ninth embodiment will be described with reference to the flowchart of FIG. When the step of main cleaning is completed (STEP 1), the rinse step with tap water subsequently starts (STEP 2). The opening degree of the flow control on-off valve 30 is adjusted (STEP 3), and the flow control on-off valve 30 is fully opened (S
In TEP4), when the detection unit 23 detects the shortage of the set flow rate of the wash water pipeline 8 (STEP5), the control unit 14 switches the three-way switching valve 31 to the bypass flow path 24 side NC based on the detection information ( In STEP 6), low-temperature (30 ° C. to 40 ° C.) hot and cold water is supplied from the fixed temperature control valve 33 to lower the cleaning water temperature and secure the set flow rate supplied from the cleaning water conduit 8 to the upper cleaning nozzle 4 (STEP 7). ). Alternatively, even if the flow control on-off valve 30 is not fully opened, if the set flow rate is secured (STEP8), the actual rinsing starts (STE).
P9), by the start of the timer (STEP1
0), rinsing for a predetermined time is performed (STEP 11,
(STEP 12). In this way, the rinsing process proceeds.

When the set flow rate of the cleaning water pipe 8 cannot be secured in STEP 7, the detection unit 23 detects this, the timer is temporarily stopped, the control unit 14 closes the flow control on-off valve 30, and the three-way switching valve 31 is turned on. After switching to regular NO and waiting for a set time (STEP 16), the flow control on-off valve 30 is opened to secure the flow rate (STEP 2). Then, rinsing for a predetermined time is performed. Only when the set flow rate is ensured by repeating the above, the rinsing process proceeds. Also, when a shortage of the flow rate is detected during the progress of the rinsing process (STEP 13), the process is connected to the above-mentioned STEP 14, and the same control is performed thereafter, and the rinsing process with cleaning water is performed until the total time satisfies the set time.

FIG. 20 shows the first part of the temperature control and flow control part 7 and the control part 14.
0 Example is shown. The tenth embodiment has two fixed temperature control valves of the fifth embodiment. That is, the hot water supply pipes 20 and the downstream sides of the water supply pipes 21 are branched into fixed temperature control valves 19 and 33, respectively.
Are provided in parallel, and check valves 22 and 34 are provided on the hot water supply pipe 20 upstream of the fixed temperature control valves 19 and 33, respectively. The bypass flow passage 24 on the downstream side of the fixed temperature control valve 33 is connected to the temperature control flow passage 26 on the downstream side of the fixed temperature control valve 19, and the bypass flow passage 24 and the temperature control flow passage 26 have electromagnetic valves 25, Three
2 is provided, and the constant flow valve 18 is provided on the downstream side of the connection point. And these two fixed temperature control valves 19 and 33, and the constant flow valve 1
A temperature adjusting and flow adjusting unit 7 is constituted by 8 and. Fixed temperature control valve 19
Is set to flow hot water at about 60 ° C. (high temperature setting) to the downstream side, and the fixed temperature control valve 33 is set to flow hot water at about 30 ° C. to 40 ° C. (low temperature setting) to the downstream side.

Wash water pipe 8 further downstream of the constant flow valve 18
A detection unit 23 and a check valve 29 are provided in the, and are connected to the nozzle 4. The detection information of the detection unit 23 is the control unit 14
The solenoid valves 25 and 32 are opened and closed to select either the fixed temperature control valve 19 set to high temperature or the fixed temperature control valve 3 set to low temperature, or both of them.

Next, the rinsing process of the tenth embodiment will be described with reference to the flowchart of FIG. After the main cleaning process is completed (STEP 1), the rinsing process is started by opening the solenoid valve 32 of the temperature control flow path 26 (STEP 1).
2). Here, when the detection unit 23 detects a shortage of the set flow rate (pressure) at the initial set temperature (STEP 3), the control unit 14 closes the electromagnetic valve 32 of the temperature control flow passage 26 and causes the electromagnetic flow of the bypass flow passage 24 of the water supply pipe 21. Open the valve 25 (STEP4),
Securing the set flow rate preferentially over the set temperature (STEP
5), the rinsing process proceeds for a predetermined time by the timer (STEP6, STEP7) (STEP8, 9). If the set flow rate (pressure) is sufficient at the initial set temperature, STEP
The process proceeds from 3 to STEP 6 as it is.

In STEP 5, if the set flow rate (pressure) is insufficient, the timer is temporarily stopped (STEP 5
11), the solenoid valve 25 of the bypass flow path 24 is closed (STE
P12), after waiting for the set time (STEP 13), the solenoid valve 32 of the temperature control flow path 26 is opened (STEP 2). Incidentally, S
It is also possible to simultaneously supply both the temperature control flow path 26 and the bypass flow path 24 between TEP2 and STEP4. In that case, the washing water temperature is about 60 ° C (high temperature setting), 45 ° C to 50 ° C (medium temperature), 30 ° C to 40 ° C.
Since there are three stages (low temperature), cleaning can be performed at a temperature as close to 60 ° C as possible, and deterioration of cleaning ability can be prevented.

The rinsing process consists of the above steps, and only when the set flow rate is secured by repeating this process, rinsing the dishes in the upper basket 3 and the lower basket 5 by the upper cleaning nozzle 4 is performed for the set time. Even when the insufficient flow rate is detected during the rinsing process (STEP 10), the above STEP 1
After that, the same control is performed, and rinsing and cleaning are performed until the total time satisfies the set time.

[0050]

As described above in detail, according to the present invention, it is possible to prevent the flow of hot water having a large flow rate and high temperature, and to prevent the damage of the nozzle and the damage of the dishes. Further, it is possible to reduce the size and cost with a simple structure.
Furthermore, the rinsing ability of tableware with clean water can be stabilized.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a dishwasher of the present invention.

[Fig. 2] Similarly, the first of the temperature control and flow control unit and the control unit of the dishwasher
It is a schematic block diagram of an Example.

FIG. 3 is a flow chart of a rinsing process of the first embodiment.

FIG. 4 is a schematic configuration diagram of a second embodiment of a temperature control / flow control unit and a control unit.

FIG. 5 is a flow chart of a rinsing process of the second embodiment.

FIG. 6 is a schematic configuration diagram of a temperature adjusting / flow adjusting unit and a control unit according to a third embodiment.

FIG. 7 is a flow chart of a rinsing process of the third embodiment.

FIG. 8 is a schematic configuration diagram of a temperature regulation / flow regulation unit and a control unit according to a fourth embodiment.

FIG. 9 is a flow chart of a rinsing process of the fourth embodiment.

FIG. 10 is a schematic configuration diagram of a fifth embodiment of a temperature control flow control unit and a control unit.

FIG. 11 is a flow chart of a rinsing process of the fifth embodiment.

FIG. 12 is a schematic configuration diagram of a sixth embodiment of a temperature control / flow control unit and a control unit.

FIG. 13 is a flow chart of a rinsing process of the sixth embodiment.

FIG. 14 is a schematic configuration diagram of a seventh embodiment of a temperature control / flow control unit and a control unit.

FIG. 15 is a flow chart of a rinsing process of the seventh embodiment.

FIG. 16 is a schematic configuration diagram of an eighth embodiment of a temperature control / flow control unit and a control unit.

FIG. 17 is a flow chart of the rinsing process of the eighth embodiment.

FIG. 18 is a schematic configuration diagram of a ninth embodiment of a temperature control / flow control unit and a control unit.

FIG. 19 is a flow chart of a rinsing process of the ninth embodiment.

FIG. 20 is a schematic configuration diagram of a tenth embodiment of a temperature control / flow control unit and a control unit.

FIG. 21 is a flow chart of a rinsing process of the tenth embodiment.

[Explanation of symbols]

 1: Dishwasher 4: Upper washing nozzle 6: Lower washing nozzle 7: Temperature regulation unit 8: Wash water pipe 13: Water heater 14: Control unit 20: Hot water pipe 21: Water supply pipe 23: Detection unit 24: Bypass Flow path 25: Solenoid valve 26: Temperature control flow path 27: Solenoid valve 30: Flow control valve

Claims (2)

[Claims] 1. A dishwasher for washing dishes by connecting a washing water pipe for supplying hot water to a nozzle, and a detection unit provided in the washing water pipe for detecting a flow rate or pressure, and a detection unit for detecting the flow rate or pressure. A dishwasher comprising: a control unit for selecting one or both of a temperature control flow path and a bypass flow path as a hot water supply path based on information. 2. A dishwasher for washing dishes by connecting a washing water pipe for supplying hot water to a nozzle, and a detector provided in the washing water pipe for detecting a flow rate or a pressure, and a detector for detecting the same. A dishwasher, comprising: a control unit that changes a mixing ratio of hot and cold water in the temperature control unit based on information.