JP2002130799A - Hot water supply control method for hot water supply / dishwashing system - Google Patents

Abstract

(57) [Summary] (Modified) [Problem] A single water heater can supply hot water to both a general hot water tap and a commercial dishwasher, and the operation of the commercial dishwasher satisfies the sanitary standards. Make sure that the condition is met. SOLUTION: A tapping pipe 23 is branched into a general hot water supply pipe 4 for supplying hot water to a general hot water tap 3 through a tapping flow rate adjusting valve 43, and an outgoing circulation path 5a for supplying hot water to a dishwasher 6, and the outgoing circulation path, The dishwashing circulation path 5 for preparing hot water supply by circulating temperature rise and keeping the temperature of the hot water storage tank 63 is formed by the going connection pipe 52a, the heat pipe 62, the return connection pipe 52b, the return circulation path 5b, and the circulation pump 52. When the water heater controller 7 receives the transmission of the closing operation signal from the door switch 83 of the washing machine 6, the circulation pump is operated to switch to the dishwashing mode, and the temperature is circulated during normal washing using the hot water in the hot water tank. When the water heater controller determines the start of the rinsing cleaning by detecting a rapid increase in the flow rate of incoming water due to the opening operation of the electromagnetic on-off valve 66,
Rinse hot water at 0 ° C or higher from the heat exchanger.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heater for connecting a commercial dishwasher to one hot water heater for supplying hot water to a general hot water faucet in a kitchen or a lavatory. The present invention relates to a hot water supply control method for a hot water supply / dishwashing system used for supplying the above-mentioned dishwasher to a commercial dishwasher.

[0002]

2. Description of the Related Art Conventionally, as a hot water supply / dishwashing system in which a general household dishwasher is connected to a water heater, high-temperature water heated by a heat exchanger and water are mixed in a mixing section to obtain a desired temperature. A dishwasher is connected to a branch pipe that is branched upstream of the mixing section for one hot water heater that supplies low-temperature water to a general hot water tap, and the low-temperature water mixed with hot water is supplied to the general hot water tap. On the other hand, there has been known a dishwasher in which high-temperature water can be supplied as it is (see, for example, JP-A-6-294524).

[0003] When a general household dishwasher is also connected to a single hot water heater for supplying hot water to a general hot water tap, a method of controlling hot water supply in a hot water supply / dishwashing system usually includes the above general hot water tap. Hot water supply control is performed. That is, even if the operation switch of the dishwasher is turned on while hot water is being supplied to the general hot water tap, the hot water supply to the general hot water tap is given priority and the dishwasher is put on standby until the hot water supply ends, When the general hot water tap is opened during the operation of the washing machine, the priority hot water supply control for the general hot water tap is performed such that the dishwasher is forcibly stopped and the operation of the dishwasher is resumed after the hot water supply to the general hot water tap is completed. (See, for example, Japanese Patent No. 30221234).

On the other hand, to supply high-temperature water to a commercial dishwasher, a storage tank for storing hot water is provided, and the hot water in the storage tank is heated to a predetermined high temperature by a heater, and the hot water is stored in an operating state. Conventionally, a dedicated pump is supplied to the dishwasher accordingly. This is different from general household use, where sanitary standards are applied to commercial dishwashers used in restaurants, etc. according to the Food Sanitation Law, etc. It is necessary to supply In particular, in rinsing after washing, it is necessary to continuously supply rinsing water at a high temperature (for example, 80 ° C. or more) higher than a predetermined temperature.

[0005]

By the way, in the above-mentioned conventional hot water / dishwashing system, a commercial dishwasher used in a restaurant or the like is connected to the water heater instead of the general household dishwasher. It is possible. In this case, when the priority hot water supply control for the general hot water tap is applied, when the general hot water tap is opened during the operation of the dishwasher, hot water supply to the dishwasher is stopped and the operation is interrupted. In addition, even if the general hot water tap is closed and hot water supply to the dishwasher is resumed, it will be lower than the hot water temperature before interruption, and it will not be possible to meet the above sanitary standards Can be In addition, in a commercial dishwasher, if the rinsing water temperature and the rinsing flow rate satisfying the above hygiene standards are not secured during the operation, the operation is automatically stopped. There is also a risk that the dishwasher may be mistakenly recognized as having completed the washing operation by the dishwasher and the dish may be taken out without washing being completed.

Therefore, in the above case, instead of priority hot water supply control for a general hot water tap, if the commercial dishwasher is started to operate, hot water from the heat exchanger is supplied with priority to the dishwasher side, and It is conceivable to perform priority hot water supply control for the dishwasher, which controls the hot water supply so that the outlet temperature becomes the high temperature required for the commercial dishwasher. However, since the operation of the dishwasher for business use and the water heater are individually controlled, the start or end of the operation of the dishwasher is grasped on the water heater side to control the operation of the water heater. The issue is how to switch between the two. In addition, even if the hot water supply control state for the general hot water tap was previously switched to the hot water supply control for the dishwasher, the hot water from the heat exchanger does not immediately reach the required temperature in the dishwasher. Alternatively, at the beginning of hot water supply to the dishwasher, high-temperature water lower than the temperature required for the operation may be supplied. That is, in the water heater, the water inlet side of the heat exchanger is usually directly connected to a water pipe, and tap water supplied from the water pipe is supplied to the heat exchanger to heat the water. This is because it is difficult to raise the temperature immediately.

The present invention has been made in view of such circumstances, and an object of the present invention is to connect a single water heater capable of supplying hot water to a general hot water tap, particularly to a commercial dishwasher. In such a case, it is an object of the present invention to ensure that the operation of the commercial dishwasher can be performed in a state satisfying the sanitary standards.

[0008]

In order to achieve the above object, a first aspect of the present invention is to provide a high-temperature hot water outlet to a first branch path by branching a tapping side of a heating heat exchanger constituting a water heater. A hot water / dishwashing system in which low-temperature water whose temperature has been adjusted by mixing water with water can be supplied to a general hot water tap, while high-temperature water supplied to a second branch can be supplied to a commercial dishwasher. The following specific items shall be applied to the hot water supply control method. That is, the dishwasher and the water heater are connected to each other so that information on the operation start operation performed on the commercial dishwasher can be transmitted to the water heater, and the operation of the water heater is controlled based on the information. It is a specific matter that the control is switched to a dishwashing mode in which hot water supply is controlled so that the temperature of the high-temperature water discharged to the second branch path becomes a temperature required for the operation of the dishwasher. Item 1). The "operation start operation" includes an operation of various operation switches by an operator on the dishwasher side, an opening / closing operation of an opening / closing door of a washing room, and the like.

According to the present invention, when an operator performs an operation for starting operation on the dishwasher side, information on the operation start operation is transmitted to the water heater, and the water heater is operated based on the transmission information. The start of the operation of the dishwasher is grasped on the side (for example, the water heater controller). When the start of the operation of the dishwasher is grasped, the operation of the water heater is controlled in the dishwashing mode on the water heater side, and high-temperature water having a temperature required for the operation of the dishwasher is supplied to the second branch. The hot water will be poured on the road.

In the above invention, the high-temperature water discharged from the second branch is turned on the dishwasher side by the operation of the circulating pump and returned to the water inlet side of the heat exchanger, which is required in the operation of the dishwasher. The dishwashing circuit for raising and maintaining the temperature at a certain temperature may be formed, and a circulation operation by the dishwashing circuit may be executed in the dishwashing mode (claim 2). In this case, the switching to the dishwashing mode activates the circulation pump, whereby high-temperature water discharged from the heat exchanger is circulated through the second branch passage into the dishwashing circulation passage, and is returned to the heat exchanger. It is returned, further heated, and taps into the second branch. Since the high-temperature water in the dishwashing circuit is sufficiently heated by this circulation operation, the temperature is raised to and maintained at the temperature required for the operation of the dishwasher. For this reason, even if hot water inside the dishwasher is supplied to the dishwasher at any point in the course of the dishwashing circuit, for example, for rinsing, the predetermined height of the dishwasher is ensured. It becomes possible to supply a rinse water at a temperature. In other words, it becomes possible to reliably prepare hot water supply for the dishwasher by the circulation heating operation by the dishwashing circuit.

In order to supply high-temperature water to the dishwasher in a state where the hot water supply to the dishwasher has been prepared by the dishwashing circuit as described above, the dishwasher is supplied from the middle of the dishwashing circuit via an electromagnetic on-off valve. The high-temperature water in the dishwashing circuit may be supplied to the dishwasher by opening the electromagnetic on-off valve. This makes it possible to realize preparation of hot water supply by the dishwashing circuit and supply to the dishwasher with a simple configuration.

[0012] In the case of the above-mentioned claims 1 to 3, the "sending information about the operation start operation to the water heater" is configured such that the opening / closing door for opening and closing the washing room of the dishwasher is closed from the open state. A door switch for detecting that the operation has been performed may be provided, and the detection signal may be transmitted to the water heater side,
In this case, the switching control to the dishwashing mode may be performed in response to the closing operation information transmitted from the door switch. In other words, in order to perform dishwashing with the dishwasher, it is necessary to store the dishes in the washing room, so that the opening / closing door is opened for storing the dishes, and that the closing operation after the storage is detected and transmitted. By doing so, it is possible to reliably set the timing for switching control to the dishwashing mode. The door switch may be one that detects the closing operation itself (movement of the opening / closing door on the closing side) or one that detects that the door has been closed by the closing operation (for example, a limit switch). Either may be used.

When switching to the dishwashing mode is performed on the basis of the closing operation information as described above, the door switch detects that the opening / closing door has been opened from the closed state, and switches to the dishwashing mode. After the switching control, in response to the opening operation information transmitted from the door switch, the operation control of the water heater is switched to a general hot water supply mode in which low-temperature water of a set hot water supply temperature is supplied to the general hot water tap by controlling the temperature by mixing hot and cold water. (Claim 5). In this case, in addition to the switching control to the dishwashing mode based on the closing operation information from the door switch, the switching control to the general hot water supply mode based on the opening operation information from the same door switch can be performed. . In this case, the door switch detects the opening operation itself (movement of the opening / closing door on the opening side), but also detects the closed state. Or any of them.

[0014] In the above-mentioned claim 1, the control mode between the dishwashing mode and the general hot water supply mode in which low-temperature water of a set hot water supply temperature is supplied to the general hot water tap by controlling the temperature by mixing hot and cold water on the water heater side. May be provided. In this case, even if the state of the changeover switch is the state of the changeover operation to the general hot water supply mode, the operation start operation on the dishwasher side may be performed. The operation control of the water heater can be switched to the dishwashing mode based on the transmission information (claim 6). In this way, in the case where the dishwasher is not used for the time being, the operation of the water heater is controlled by the user by switching the operation to the general hot water supply mode by the above-mentioned switch. While it is possible to change only to the dishwasher side, even if the user forgets or does not know to operate the changeover switch to the dishwashing mode to operate the dishwasher, It becomes possible to acquire the operation start operation information and automatically switch to the dishwashing mode.

When the above-mentioned changeover switch is provided, the changeover switch may be forcibly switched to the dishwashing mode as the changeover control to the dishwashing mode. In this case, the same operation as that of the sixth aspect can be obtained, and the control can be simplified.

In the first aspect, the water heater is provided with an operation changeover switch capable of performing an ON / OFF switching operation of the operation of the water heater, even if the operation changeover switch is in an OFF state. The operation changeover switch may be forcibly switched to the ON state based on the transmission information about the operation for starting the operation on the dishwasher side, and the operation control of the water heater may be switched to the dishwashing mode. Item 8). In order to perform the operation of the dishwasher, it is a major premise that the water heater is operated, but by performing the above, for example, the water heater is brought into the operating state due to forgetting to press the operation switch. Even if there is no dishwasher, it becomes possible to automatically put the water heater into an operating state based on the transmission information from the dishwasher side, and to put it in an operation control state in the dishwashing mode. To achieve this, even if the operation changeover switch is in the OFF state, for example, the water heater controller may be kept in the standby energized state.

In the case where the control mode changeover switch or the water heater operation changeover switch is forcibly switched as described above, a notifying means is provided, and the forcible switching is notified by the notifying means together with the forced switching control. The notification means may be controlled (claim 9). This makes it possible for the user or the operator of the dishwasher to be aware of the situation and give a sense of security. As the notification means, an alarm buzzer, a warning light, a display unit of a remote controller (remote controller), or the like may be employed.

According to a second aspect of the present invention, low-temperature water whose temperature has been adjusted by mixing water with high-temperature water discharged from a first branch path by branching a tapping side of a heating heat exchanger constituting a water heater is generally used. A hot water supply system capable of supplying hot water to a hot water tap and a hot water supply system for a hot water supply / dish washing system in which high-temperature water supplied to a second branch is supplied to a commercial dishwasher, and has the following specific items. It is. That is, an incoming water flow rate sensor that detects an incoming water flow rate entering the heat exchanger, a mixed water flow rate sensor that detects a supply flow rate of mixing water supplied to the first branch path for temperature control. When the incoming water flow rate is detected by the incoming water flow rate sensor despite the fact that the mixed water flow rate is not detected by the mixed water flow rate sensor, hot water is supplied to the second branch as the operation control of the water heater. It is a specific matter that the control is switched to a dishwashing mode in which hot water supply is controlled so that the temperature of the high-temperature water becomes a temperature required for the operation of the dishwasher.
0).

According to the second aspect of the present invention, the information on only the water heater side, that is, the two flow rates, is completely separated from the dishwasher side without receiving information such as signals from the dishwasher. It is possible to detect the start of operation of the dishwasher only by monitoring a change in the detection state, and it is possible to control hot water supply to the dishwasher based on the detection.

In the second aspect of the present invention, the high-temperature water discharged to the second branch path is turned back on the dishwasher side by the operation of the circulation pump and returned to the water inlet side of the heat exchanger, so that the dishwasher operates. A dishwashing circuit for raising and maintaining a required temperature may be formed, and a circulation operation by the dishwashing circuit may be executed in a dishwashing mode (claim 11). In this case, as described in the first invention, the circulation pump is operated by switching to the dishwashing mode, and the high-temperature water in the dishwashing circuit is sufficiently heated by the circulation operation. The temperature is reliably raised to and maintained at the temperature required for the operation of the washer. For this reason, even if hot water inside the dishwasher is supplied to the dishwasher at any point in the course of the dishwashing circuit, for example, for rinsing, the predetermined height of the dishwasher is ensured. It is possible to supply a rinse water at a temperature, and it is possible to reliably prepare hot water supply for the dishwasher.

In the case of the eleventh aspect, a circulating flow sensor for detecting a circulating flow rate in the dishwashing circulation path is further provided, and a rinsing mode including a rinsing mode is provided to the water heater controller for controlling the operation of the water heater. The hot water supply temperature required in each of the plurality of operation modes performed by the operation on the machine side is stored in advance, and in the dishwashing mode, the detected incoming water flow rate from the incoming water flow rate sensor and the detected circulating flow rate from the circulating flow rate sensor are compared. The current operation mode of the dishwasher is determined based on the comparison, and the hot water supply is performed so that the temperature of the high-temperature water discharged to the second branch becomes the stored value of the hot water supply temperature required in the determined current operation mode. The operation of the vessel may be controlled (claim 12). This makes it possible to reliably supply high-temperature water at a temperature required in the current operation mode in which the dishwasher is operated. In addition, the current operation mode on the dishwasher side can be reliably determined and grasped only by the information on the water heater side, that is, only by comparing the above-mentioned incoming water flow rate and circulating flow rate. For example, while hot water is being prepared by the circulation operation of the dishwashing circuit, although the detected circulation flow rate is considerable, the newly input flow rate (detected water flow rate) is zero or almost zero. When high-temperature water heated to a predetermined temperature by the circulation path starts to be supplied to the dishwasher for, for example, rinsing, the input pressure of the heat exchanger, for example, from a water pipe to the heat exchanger is much higher than the discharge pressure of the circulation pump. , The detected circulating flow rate is extremely low or almost non-existent, though the detected incoming water flow rate increases rapidly. Therefore, the supply of the dishwasher from the dishwashing circuit starts,
That is, it is possible to determine that the rinse cleaning mode has been started. Preferably, the circulation flow sensor is provided on the return side of the dishwashing circulation path.

Incidentally, in the case of the operation control of the water heater based on the determination of the current operation mode, the high-temperature water detecting the temperature of the high-temperature water supplied to the dishwasher from the heat exchanger through the second branch path. A temperature sensor and a notifying unit are provided, and when the detected temperature from the high-temperature water temperature sensor is lower than the stored value of the hot water supply temperature required in the determined current operation mode, the notifying unit notifies the temperature. (Claim 13). Thus, if the hot water supply temperature to the dishwasher is lower than the predetermined required hot water supply temperature for some reason, it is possible to call attention to an operator or the like.

[0023]

As described above, according to the hot water supply / dishwashing system according to any one of the first to thirteenth aspects, the hot water heated by the heat exchanger is mixed with hot water. Even if a commercial dishwasher is connected to a water heater that regulates the temperature and supplies hot water to a general hot water tap, a hot water / dishwashing system is constructed, but the hot water heater and the dishwasher for commercial use can be used with the single water heater. High-temperature water at a temperature required for operation can be reliably supplied, and particularly, the sanitary standards at the time of rinsing can be satisfied, and the operation of the commercial dishwasher can be reliably realized. In particular, according to claims 1 to 9, the start of operation of the dishwasher is reliably grasped on the water heater side based on the transmission information from the dishwasher side, and the operation control of the water heater is set to the dishwashing mode. According to the tenth to the thirteenth aspect, the start of the operation of the dishwasher can be surely grasped based on the flow rate fluctuation state on the water heater side.
As described above, the operation control of the water heater can be switched to the dishwashing mode.

In particular, according to the second aspect of the present invention, the circulation heating operation by the dishwashing circuit can raise and maintain the temperature to the temperature required for the operation of the dishwasher. It can be surely prepared. For this reason, even if hot water inside the dishwasher is supplied to the dishwasher at any point in the course of the dishwashing circuit, for example, for rinsing, the predetermined height of the dishwasher is ensured. A temperature rinse water can be supplied.

According to the third aspect, preparation of hot water supply through the dishwashing circuit and supply to the dishwasher can be realized with a simple configuration.

According to the fourth aspect, the timing of the switching control to the dishwashing mode can be reliably performed based on the closing operation information transmitted from the door switch.

According to the fifth aspect, in addition to the switching control to the dishwashing mode based on the closing operation information from the door switch,
Switching control to the general hot water supply mode based on the opening operation information from the same door switch can also be performed.

According to the sixth aspect, the user can select the general hot water supply mode or the dishwashing mode for the operation control of the water heater according to the situation of the user, while washing the dishware. Even if the switching operation of the changeover switch to the dishwashing mode is forgotten before the operation of the machine, the hot water supply side automatically obtains the operation start operation information of the dishwasher side and automatically switches to the dishwashing mode. Can be.

According to the seventh aspect, the same effects as those of the sixth aspect can be obtained, and the control can be simplified.

According to the eighth aspect, even when the water heater is not in the operation state due to forgetting to press the operation changeover switch or the like, the water heater is automatically operated based on the transmission information from the dishwasher side. And an operation control state in the dishwashing mode can be achieved.

According to the ninth aspect, the situation can be noticed to the user or the worker of the dishwasher, and a sense of security can be given.

According to the tenth aspect, the start of the operation of the dishwasher is detected only by the information of the water heater side in a state of being completely separated from the dishwasher side without receiving information such as signals from the dishwasher. The hot water supply control for the dishwasher can be performed based on the detection.

According to the eleventh aspect, also in the case of the tenth aspect, the temperature can be raised and maintained to the temperature required for the operation of the dishwasher by the circulation temperature raising operation by the dishwashing circuit. Hot water supply preparation for the washing machine can be surely prepared. For this reason, no matter at what point in time the internal high-temperature water is supplied to the dishwasher in the middle of the dishwashing circuit, a predetermined high-temperature rinse water is reliably supplied to the dishwasher. can do.

According to the twelfth aspect, it is possible to reliably supply high-temperature water having a temperature required in the current operation mode operated on the dishwasher side. In addition, the current operation mode of the dishwasher can be reliably determined and grasped only by the information of the water heater.

According to the thirteenth aspect, when the hot water supply temperature for the dishwasher is lower than a predetermined required hot water supply temperature for some reason, the worker can be alerted.

[0036]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a hot water supply / dishwashing system according to an embodiment of the present invention. Reference numeral 2 denotes a water heater having a heat exchanger 21 for heating, and 3 denotes one or more general hot water supplied from the water heater 2. A hot-water tap (only 1 is shown in FIG. 1), 4 is a general hot-water pipe as a first branch which branches off from the tapping side of the heat exchanger 21 and is connected to each general hot-water tap 3, and 5 a is a second hot-water pipe.
Circulating pipe as a branch of, 6 is a commercial dishwasher,
Reference numeral 7 denotes a water heater controller, and reference numeral 8 denotes a dishwasher controller. In the present hot water supply / dishwashing system, high-temperature water of a predetermined temperature is circulated between the hot water supply 2 and a hot water storage tank 63 of the dishwasher 6 as a later-described dishwashing circuit 5,
The heat exchanger 21 is capable of not only further heating and raising the temperature but also keeping the hot water in the hot water storage tank 63 warm.

The water heater 2 includes the heat exchanger 21 disposed in the combustion can body 20, a water inlet pipe 22 connected to a water pipe to feed tap water into the heat exchanger 21, 2
Tap water for tapping the hot water heated in step 1; tapping pipe 23 for tapping high-temperature water heated in step 1; hot water supply pipe 4 and circulation pipe 5a branched from tapping pipe 23; A water bypass pipe 24 as a mixed water supply path for mixing, a combustion burner 25 for heating the heat exchanger 21 by combustion heat, and a fuel supply pipe 26 for supplying fuel such as combustion gas to the combustion burner 25. It has.

The upstream end of the water bypass pipe 24 is branched and connected to the water inlet pipe 22 at an upstream position. Thereafter, a check valve 27, a water flow sensor 28, and a water temperature sensor 29 are sequentially connected to the downstream side. Is equipped. The check valve 27 includes:
The downstream end of a circulation return pipe 5b described later is connected, and a check valve 50, a circulation flow sensor 51, and a circulation pump 52 are interposed in the circulation return pipe 5b. A tapping temperature sensor 30 as a high-temperature water temperature sensor is interposed in the tapping pipe 23,
The tapping temperature sensor 30 detects the tapping temperature flowing through the general hot water supply pipe 4 and the circulation outflow pipe 5a.

The water bypass pipe 24 is provided with a mixed water flow sensor 31 and a mixed water flow regulating valve 32, and the downstream end thereof is connected to the mixing section 41 of the general hot water supply pipe 4.
A check valve 42 for allowing the general hot water supply pipe 4 to flow only to the general hot water tap 3 side between the upstream end side and the mixing section 41;
A hot water flow control valve 43 for changing and adjusting the flow rate from the hot water pipe 23 is interposed, and a hot water supply temperature is provided downstream of the mixing section 41 to detect a hot water supply temperature after the hot and cold water is mixed in the mixing section 41. A sensor 44 is provided.

The circulating outgoing pipe 5a is connected to an outgoing connecting pipe 52a at the downstream end thereof. The downstream end of the going connection pipe 52a is communicated with one end of a heat pipe 62 described later provided in a hot water storage tank 63 of the dishwasher 6 described later, and a return connection pipe 5 is connected to the other end of the heat pipe 62.
The upstream end of the return connection pipe 52b communicates with the downstream end of the return connection pipe 52b and the upstream end of the circulation return pipe 5b. The above-mentioned circulation going pipe 5a, going connecting pipe 52a, heat pipe 6
2. The return connection pipe 52b and the circulation return pipe 5b constitute a dishwashing circulation path 5 for preparing hot water supply to the dishwasher 6, pouring, keeping warm, and supplying rinse water.

In the combustion burner 25, while the main on-off valve 33 is opened and the fuel supplied through the fuel supply pipe 26 is subjected to supply adjustment by the fuel adjustment valve 34, a plurality of combustion control valves 35, 35,. The combustion amount is made variable by changing and adjusting the combustion operation range by the operation control.
By changing the amount of combustion, the amount of heating in the heat exchanger 21 is changed, and the tapping temperature is changed.

The dishwasher 6 has a washing chamber 61 for accommodating dishes W to be washed, and a hot water storage tank partitioned below the washing chamber 61 and having a heat pipe 62 for keeping heat therein. 63, a pump and a washing mechanism (not shown) for circulating and jetting the hot water for washing in the hot water storage tank 63 to the tableware W to wash the tableware W, pouring the hot water into the hot water tank 63, and supplying the hot water to the cleaning chamber 61; A hot water supply mechanism 64 for spraying rinse water on the tableware W is provided.

The hot water supply mechanism 64 includes a supply pipe 65 branched from the outgoing connection pipe 52a, an electromagnetic on-off valve 66 and a constant flow valve 67 interposed in the supply pipe 65, and a cleaning chamber branched on the downstream side. A pair of upper and lower rinsing nozzles 68, 68 extending to the upper and lower portions 61 are provided.

The operation of the dishwasher 6 will be described briefly. First, when a hot water supply switch 81 is turned on by an operator, the electromagnetic opening / closing valve 66 is opened by the controller 8 to go to the circulation pipe 5a and the connection pipe. Hot water is supplied through the supply pipe 52a and the supply pipe 65, and the pouring operation to the hot water storage tank 63 is started. When the pouring is completed, the electromagnetic on-off valve 66 is closed, and accordingly, the high-temperature water circulates in the dishwashing circuit 5 and passes through the heat pipe 62 so that the hot water stored in the hot water storage tank 63 is heat-exchanged for a predetermined time. Keep the temperature above the temperature (for example, 65 ° C.). Next, the operation switch 82 is turned on by the operator.
After that, the open / close door (not shown) is opened to allow the tableware W to be accommodated in the washing room 61, and when the open / close door is closed, the door switch 8 is opened.
When the door switch 83 is turned on and the door switch 83 is turned on, normal washing is automatically started by the dishwasher controller 8. This normal washing is performed by injecting the hot water in the hot water storage tank 63 to the tableware W using a pump (not shown). During this time, the heat retention of the hot water storage using the dish washing circuit 5 is continued. Then, when the normal cleaning is completed, the electromagnetic on-off valve 66 is opened again, and rinse water having a predetermined temperature (for example, 80 ° C. or higher) is sprayed from the pair of rinse nozzles 68 and 68 onto the tableware W to perform the rinse cleaning. When the rinsing cleaning is completed, all the cleaning operations are completed, and the tableware W can be taken out by opening the opening / closing door.

The dishwasher controller 8 is connected to the water heater controller 7 through the communication lines 85 and 73 by connecting the communication connector 84 to the connector 72 of the water heater 2 so as to be capable of bidirectional communication. The operation control as described above is performed in cooperation with the controller 7. It should be noted that bidirectional communication may be made possible by a wireless method instead of a wired method.

That is, the dishwasher controller 8
Are the ON signal from the hot water supply switch 81, the ON signal from the operation switch 82, and the door switch 8 as shown in FIG.
Receiving the ON signal (closing operation signal of the opening / closing door) from 3, the opening / closing operation of the electromagnetic opening / closing valve 66, execution of each operation mode of pouring, normal cleaning, and rinsing based on a built-in timer, and pouring and cleaning The control of the sounding operation of the buzzer 80 for notifying the completion of each operation mode is performed. Together,
The dishwasher controller 8 turns on the ON signal (operation start operation information) from the hot water supply switch and turns on the door switch.
A signal (closing operation information) is transmitted to the water heater controller 7 via the communication line 85, the connectors 84 and 72, and the communication line 73.

The water heater controller 7 includes a dish switch 74 as a control mode switch, a washing hot water controller 75 for executing a washing priority control including a dish washing mode for the dish washer 6, and a general hot water tap 3. And a general hot water supply control unit 76 for executing hot water supply priority control including a general hot water supply mode for the hot water supply mode. And the water heater controller 7
Is based on the signals transmitted and output from the dishwasher controller 8 and the outputs from the flow rate sensors 28, 31, and 51 described below. Is switched between hot water supply priority control and various operation switching in the cleaning priority control. The above-mentioned cleaning priority control and hot water supply priority control are based on the detection values from the input water temperature sensor 29, the input water flow sensor 28, the output water temperature sensor 30, the mixed water flow sensor 31, the hot water supply temperature sensor 44, and the circulation flow sensor 51, and
Upon receiving an input setting signal such as a set hot water supply temperature of a user setting from the remote controller 71 or an output of the dishwashing switch 74 or the like,
Controlling the combustion amount (heating amount) by the combustion adjustment units 34 and 35 including the fuel adjustment valve 34 and the combustion control valves 35, 35,..., The tap water flow adjustment valve 43, the mixed water flow adjustment valve 32, the circulation pump 52, and the like. This is performed by controlling each operation of.

The dishwashing mode includes preparation of hot water and heat retention based on the temperature rise on the water heater side by the circulation operation of the dishwashing circulation path 5, wherein the heat retention operation is performed in parallel with the operation control in the general hot water supply mode. It is permissible to do so. The dishwashing switch 74 can be turned on and off by a user's switching operation, and is automatically turned on in response to an ON signal from the hot water supply switch 81 or a transmission of an ON switch of the door switch 83.
The hot water supply switch is switched from hot water supply priority control to cleaning priority control by turning on the dishwashing switch 74. In addition, the remote control 71 has a water heater 2
A main switch 77 is provided as an operation changeover switch for performing ON / OFF switching operation of the operation of the dishwasher. The ON signal from the hot water supply switch 81 or the ON switch of the door switch 83 is transmitted from the dishwasher 6 side. If the main switch 77 is in the OFF state when it is received, it is automatically turned ON. When the dishwashing switch 74 or the main switch 77 on the remote controller 71 is automatically turned on, the notification may be performed by the notification unit 78 including an alarm buzzer or the like.

The hot water supply priority control by the general hot water supply control section 76 is performed as follows. That is, the general hot water tap 3
Is opened and the incoming flow rate equal to or higher than the minimum operating flow rate is detected by the incoming flow rate sensor 28, the combustion operation of the combustion burner 25 is adjusted by the combustion adjusting sections 34 and 35, and the high-temperature water of a predetermined temperature is supplied to the heat exchanger. The hot water is discharged from the outlet 21, and the entire amount of the hot water flows to the mixing section 41 through the check valve 42 and the hot water flow control valve 43 because the circulation pump 52 is in the stopped state.
Then, in the mixing section 41, the water is mixed with the water supplied from the water bypass pipe 24, and the temperature is adjusted to the set hot water supply temperature set by the user with the remote controller 71, and the low-temperature water after the temperature adjustment passes through the general hot water supply pipe 4. Hot water is supplied to the general hot water tap 3. In this case, the combustion operation is performed based on the incoming water temperature from the incoming water temperature sensor 29 and the incoming water flow rate from the incoming water amount sensor 28, while the outflow water flow control valve 43 is fully opened and the incoming hot water temperature sensor 44 The opening degree of the mixed water flow control valve 32 is proportionally controlled so that the detected temperature becomes the set hot water supply temperature.

The cleaning priority control by the cleaning hot water supply controller 75 is performed as follows. First, as a premise, a state is set in which the tapping flow control valve 43 is restricted so as not to open above the set upper limit opening, and the mixed water flow control valve 32 is also restricted so as not to open above the set upper limit opening. . Thus, most of the high-temperature water discharged from the heat exchanger 21 is supplied to the circulation outflow pipe 5a. The storage unit of the washing hot water supply control unit 75 previously stores the hot water supply temperature required in each operation mode for each of the operation modes performed by the dishwasher 6, and based on the stored hot water supply temperatures. The amount of heating in the heat exchanger 21, that is, the amount of combustion of the combustion burner 25 is changed and set, and hot water supply preparation, pouring, warming,
The hot water supply temperature of the rinse water is changed as needed. The hot water supply temperature required in each of the above operation modes is changed, for example, in the range of 65 to 85 ° C., and is set to 80 ° C. or more in the case of the rinsing cleaning mode.

The washing / hot water supply control section 75 has an operation mode judging section. After the dishwashing circulation path 5 is circulated by switching to the dishwashing mode to be in the hot water supply preparation operation state, the operation mode judging section is provided. In the above, it is determined whether the current operation mode of the dishwasher 6 is the pouring mode, the normal cleaning mode, or the rinsing mode, and based on the determination result, the amount of heating in the heat exchanger 21 is changed. Settings are to be made. The above determination is based on the ON signal of the hot water supply switch 81 and the ON signal from the door switch 83 transmitted from the dishwasher 6 side, and the respective detected flow rates from the incoming water flow sensor 28, the mixed water flow sensor, and the circulation flow sensor 51. It is done based on.

That is, as shown in FIG. 3, the mode is switched to the dishwashing mode in response to the transmission of the ON signal from the hot water supply switch 81, and when the circulating pump 52 is operated by this switching, the dishwashing via the heat exchanger 21 is performed. Since the circulation operation is performed only in the circulation path 5, the flow rate of the mixed water is not detected, and the detected flow rate and the detected circulation flow rate are both detected as the same value Qo. That is, although there is no water input from the upstream water pipe of the water inlet pipe 22, in the present embodiment, the incoming water flow rate sensor 28 is located closer to the heat exchanger 21 than the downstream connection end of the return circulation path 5b. , Circulating flow sensor 5
The high-temperature water that has passed through 1 also passes through the incoming water flow sensor 28 as it is. When the pouring mode is started on the dishwasher 6 side, the electromagnetic on-off valve 66 is opened, so that the incoming water flow sensor 28 passes the incoming water flow from the upstream water pipe in addition to the circulating flow. That is, the detected incoming flow rate Q1 is much larger than the detected circulating flow rate Q2. This is because the incoming pressure from the water pipe acting on the incoming pipe 22 is much higher than the discharge pressure of the circulation pump 52,
For this reason, most of the high-temperature water flowing to the outgoing circulation path 5a flows into the supply pipe 65, and hardly flows to the return circulation path 5b side. Next, in the cleaning operation, since the door switch 83 is turned on to enter the normal cleaning mode, the dish circulation circuit 5 is in a circulating operation state, so that the mixed water flow rate is not detected as described above, while the detected water input is detected. The flow rate Qo and the detected circulation flow rate Qo have the same value. And the electromagnetic on-off valve 6
When the rinsing mode is entered by the opening operation of 6, the water flow from the upstream water pipe is passed through the water flow sensor 28 in addition to the circulating flow similarly to the start of the pouring mode described above. The flow Q1 is much larger than the detected circulation flow Q2. As described above, each timing of the start of the pouring mode or the start of the rinsing cleaning mode from the normal cleaning mode can be determined based on the fluctuation state of each flow rate without depending on the transmission information on the dishwasher 6 side. .

During the above-mentioned cleaning priority control, except for the supply of the rinse water, according to the surplus combustion amount which is the difference between the current combustion amount of the combustion burner 25 and the maximum combustion amount (maximum heating capacity). The value of each set upper limit opening of the tapping flow rate adjusting valve 43 and the mixed water flow rate adjusting valve 43 is changed, so that even when the general hot water tap 3 is opened during the operation of the dishwasher 6. The amount of hot water supplied to the general hot water tap 3 and the temperature control of the hot water supply temperature are performed as far as possible without impairing the operation of the dishwasher 6. However, in the temperature control in this case, the hot water supply temperature set by the user on the remote controller 71 is forcibly limited to a predetermined temperature (for example, 48 ° C.) or lower, and the temperature control is performed based on the limited hot water supply temperature. Is also good. During the supply of the rinsing water, the set upper limit opening of the tapping flow control valve 43 is set to a minute opening or an opening in a closed state to secure the flow of the rinsing water, while the mixed water flow adjusting valve 32 is provided. Is set as the minute opening corresponding to the minimum flow rate that can be detected by the mixed water flow sensor 31.
When the general hot water tap 3 is opened, the tap water flow control valve 43
Is prevented from being supplied to the general hot water tap 3 as it is. That is, the water is mixed with the high-temperature water leaking from the tapping flow control valve 43 without interrupting the supply of the mixed water to the mixing section 41.

Hereinafter, the link control between the dishwasher controller 8 and the water heater controller 7 will be described in detail with reference to FIG.

First, the hot water supply switch 81 is set on the dishwasher 6 side.
Is turned on by the operator, the dishwasher controller 8 opens the electromagnetic opening / closing valve 66 for hot water in the hot water storage tank 63 by pouring (step SA1), while the hot water supply controller 7 controls the hot water supply switch. In response to the transmission of the ON signal 81, the dish switch 74 is also turned on in conjunction with the
By this ON operation, the mode is switched to the cleaning priority control, hot water supply preparation (start of operation of the circulation pump 52) is performed, and high-temperature water is circulated and heated in the dish circulation circuit 5 (steps SB1 and SB)
2). When the pouring mode is entered by the opening operation of the solenoid on-off valve 66, the water heater controller 7 determines the pouring mode start timing based on the flow rate fluctuation as described above, and determines the predetermined timing by controlling the combustion amount corresponding to the pouring mode. Hot water having a high temperature is discharged from the heat exchanger 21. The hot water is supplied through the outgoing circulation path 5a, the outgoing connection pipe 52a, and the supply pipe 65, whereby the pouring (hot water) into the hot water storage tank 63 via the cleaning chamber 61 is started (step SB3). The dishwasher controller 8 sets this pouring for a predetermined time (for example, 1
After continuing for 5 minutes and 40 seconds at a flow rate of 0 L / mim (step SA2), the electromagnetic on-off valve 66 is closed (step SA3). The water heater controller 7 returns to the circulation state in the dishwashing circulation path 5 again with this closing operation, determines the end timing of the pouring mode based on the fluctuation of the detected flow rate, and determines the combustion at the pouring temperature. The control is stopped (step SB3), and the heat keeping operation is subsequently performed (step SB4). That is, high-temperature water circulated through the dishwashing circuit 5 is passed through the heat pipe 62 to keep the hot water poured into the hot water storage tank 63 warm.

In the above pouring operation, as shown in FIG. 4, the temperature of the hot water to be discharged may be changed stepwise to x.degree. C., 70.degree. C., x.degree. Hot water stored at a temperature (for example, 65 ° C.) or higher is removed. In the heat retention operation, high-temperature water having a temperature for keeping the temperature of the hot water in the hot water storage tank 63 at 65 ° C. or higher is circulated and supplied to the dish circulation circuit 5. The circulating supply may be continuous or intermittent (eg, every 15 minutes).

When the dishwasher controller 8 blows the buzzer 80 upon completion of the hot water to notify the worker and turn off the hot water supply switch 81 (step SA4), the OFF signal of the hot water supply switch 81 is transmitted. The received water heater controller 7 switches to the hot water supply priority control while continuing the above-described heat retention operation (step SB).
5). In other words, while the warming operation is continued, the general hot water tap 3
Is opened, hot water is supplied at the set hot water temperature set by the user of the remote controller 71.

Next, the operation switch 82 of the dishwasher 6
Is turned on by the operator, and when the tableware W is housed inside and the open / close door is closed, the door switch 83 is turned on to start the washing operation (step SA5). The ON signal of the door switch 83 is transmitted to the water heater controller 7, whereby the water heater controller 7 is switched to the cleaning priority control (step SB6). Then, the dishwasher controller 8 uses the hot water stored in the hot water tank 63 to perform normal cleaning of the tableware W for a predetermined time (for example,
After the process is performed for only 7 seconds, a predetermined time (for example, 5 seconds) for draining is waited (step SA6).

When the dishwasher controller 8 opens the electromagnetic on-off valve 66 to start the rinse washing mode after draining (step SA7), the water heater determined to be the timing of the start of the rinse washing mode due to the flow rate fluctuation due to the opening operation. The controller 7 controls the rinsing temperature (for example, 80 ° C.).
Combustion control is performed so that the high-temperature water is discharged from the heat exchanger 21 as rinse water (step SB7), and the discharged high-temperature water is supplied to each of the rinse nozzles 68 through the going circulation path 5a and the supply pipe 65. Then, the rinsing nozzle 68 is sprayed to execute the rinsing cleaning mode (step SA8). The dishwasher controller 8 closes the electromagnetic on-off valve 66 after performing this rinse until a predetermined time (for example, 15 seconds) has elapsed (steps SA8 and SA9). As a result, the supply of the rinse water to the supply pipe 65 is stopped, and the operation returns to the warming operation in which the high-temperature water in the dishwashing circulation path 5 circulates through the heat pipe 62 again (step SB8). After the closing operation of the electromagnetic on-off valve 66, the dishwasher controller 8 waits for a predetermined time (for example, 5 minutes).
(Seconds) after the draining time has elapsed (step SA1).
0) The buzzer 80 is sounded to notify the worker that the cleaning operation has been completed (step SA11). This washing completion signal is output to the water heater controller 7, and the water heater controller 7 switches to the hot water supply priority control again (step SB9). The switching to the hot water supply priority control by the water heater controller 7 may be performed in response to the transmission of the OFF signal (opening operation information) of the door switch 83 accompanying the opening operation of the open / close door. In addition, when the dishwasher controller 7 opens the electromagnetic on-off valve 66 for starting the rinse mode, the temperature of the high-temperature water detected by the tap water temperature sensor 30 has not risen to the predetermined rinse temperature. In this case, the electromagnetic on-off valve 66 may be maintained in a closed state until the temperature reaches the rinse temperature, and the electromagnetic on-off valve 66 may be opened after the detected temperature reaches the rinse temperature.

Then, when the operator opens the opening / closing door, takes out the washed tableware W, and instead stores the new unwashed tableware W and closes the opening / closing door, the door switch 83 is turned on again.
It is activated to start the normal cleaning (step SA5) and switch to the cleaning priority control (step SB6), and thereafter, the same is repeated as described above.

<Other Embodiments> The present invention is not limited to the above-described embodiments, but includes various other embodiments. That is, in the above embodiment,
As the dishwashing circulation path 5, a thing capable of keeping warm by circulating and supplying high-temperature water to the heat pipe 62 in the hot water storage tank 63 is used. However, the present invention is not limited to this. For example, as shown in FIG. During a period other than the rinsing operation, the high-temperature water supplied through the outgoing circulation path 5a and the outgoing connection pipe 52a is returned via the tank 53 to the return connection pipe 52b and the return circulation path 5b.
And a dish washing circuit 5 'circulating through a circulation pump 52
Then, a hot water supply preparation operation for raising the temperature by the circulation operation in the dishwashing circulation path 5 'may be performed. In the case of the pouring operation and the rinsing operation, by opening the solenoid on-off valve 66, high-temperature water is supplied to each of the rinsing nozzles 68 by the input water pressure. That is, in this case, the hot water supply preparation operation is performed instead of the heat retention operation of FIG. In addition, a heater 69 for controlling the heat retention operation by the dishwasher controller 8 for keeping the temperature of the hot water in the hot water storage tank 63 may be provided.

In the above embodiment, the operation of the circulation pump 52 is continued even in the pouring mode and the rinsing mode. However, the present invention is not limited to this. The operation of the pump 52 may be stopped. The timing of stopping the operation of the circulation pump 52 may be determined based on the result of the determination of the current operation mode by the above-described operation mode determination unit. That is, the start timing of the pouring mode or the rinsing mode may be determined based on a sudden increase in the flow rate of incoming water due to the opening operation of the electromagnetic on-off valve 66.

Although the dish circulation circuit 5 having the circulation pump 52 is provided in the above embodiment, the present invention may be applied to a system in which this is omitted. In this case, as shown in FIG. 6, the outgoing supply pipe (a pipe corresponding to the outgoing circulation path 5a in the above embodiment) 5a may be directly connected to the supply pipe 65 via the outgoing connection pipe 52a. Good. Then, the pouring operation and the rinsing operation may be performed by opening the electromagnetic on-off valve 66. In this case, the same heater 69 as described above may be provided for keeping the hot water in the hot water storage tank 63 warm.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a hot water supply / dishwashing system to which an embodiment of the present invention is applied.

FIG. 2 is a block diagram showing contents of respective controllers on a dishwasher side and a water heater side;

FIG. 3 is a table showing a relationship between each operation mode of the dishwasher, operation mode determination information on the water heater side, and control on the water heater side.

FIG. 4 is a flowchart showing the contents of cooperative control by a dishwasher controller and a water heater controller.

FIG. 5 is a schematic view showing a hot water supply / dishwashing system according to another embodiment.

FIG. 6 is a schematic diagram showing a hot water supply / dish washing system according to another embodiment different from FIG. 5;

[Explanation of symbols]

 2 Hot water supply unit 3 General hot water tap 4 General hot water supply pipe (first branch path) 5,5 'Dish washing circuit 5a Outgoing circuit (second branch) 6 Commercial dishwasher 7 Water heater controller 8 Dish washing Machine controller 21 heating heat exchanger 24 water bypass pipe (mixed water supply path) 28 incoming water flow rate sensor 30 hot water temperature sensor (high temperature water temperature sensor) 31 mixed water flow sensor 32 mixed water flow control valve 43 hot water flow control valve 51 circulation Flow sensor 52 Circulation pump 61 Cleaning chamber 66 Solenoid on-off valve 73, 85 Communication line 74 Dish-washing switch (changeover switch) 77 Main switch (operation changeover switch) 78 Notification unit (notification means) 83 Door switch

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuteru Nomura 93 Edocho, Chuo-ku, Kobe City, Hyogo Prefecture Inside Noritz Co., Ltd. (72) Inventor: Hidekazu Fukui 93, Edocho, Chuo-ku, Kobe, Hyogo Prefecture Inside Noritz Co., Ltd. Person Hironobu Fujii 93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo F-term in Noritz Corporation (reference) 3B082 DB01 DC02

Claims (13)

[Claims] 1. A tapping side of a heating heat exchanger constituting a water heater is branched, and high-temperature water discharged into a first branch path is mixed with water to supply low-temperature water to a general hot water tap. On the other hand, a hot water supply / dishwashing system for hot water supplied to a commercial dishwasher, which is capable of supplying high-temperature water discharged to a second branch to a commercial dishwasher. The dishwasher and the water heater are connected to each other so that information on the operation start operation can be transmitted to the water heater, and the high-temperature water discharged to the second branch as the operation control of the water heater based on the information. A hot water supply control method for a hot water supply / dishwashing system, wherein the control is switched to a dishwashing mode for controlling hot water supply so that the temperature of the dishwasher becomes a temperature required for the operation of the dishwasher. 2. A hot water supply control method for a hot water supply / dishwashing system according to claim 1, wherein the high-temperature water discharged to the second branch path is turned back on the dishwasher side by operating a circulation pump. To the temperature required for the operation of the dishwasher.
A hot water supply control method for a hot water supply / dishwashing system, wherein a dishwashing circuit for maintaining the dishwashing circuit is formed, and a circulation operation by the dishwashing circuit is performed as a dishwashing mode. 3. The hot water supply control method for a hot water supply / dishwashing system according to claim 2, wherein a supply pipe for the dishwasher is branched from a middle of the dishwashing circuit via an electromagnetic on / off valve, and the electromagnetic on / off valve is provided. A hot water supply control method for a hot water supply / dishwashing system, in which hot water in a dishwashing circuit can be supplied to a dishwasher by opening the dishwasher. 4. The hot water supply control method for a hot water supply / dishwashing system according to any one of claims 1 to 3, wherein an opening / closing door for opening / closing a washing room of the dishwasher is closed from an open state. A hot water supply control method for a hot water supply / dishwashing system, comprising: a door switch for detecting the occurrence of a change; receiving a closing operation information transmitted from the door switch; and performing switching control to a dishwashing mode. 5. A hot water supply control method for a hot water supply / dishwashing system according to claim 4, wherein the door switch detects that the open / close door has been opened from a closed state, and switches to a dishwashing mode. After the control, in response to the opening operation information transmitted from the door switch, the operation control of the water heater is controlled to be switched to a general hot water supply mode in which low-temperature water of a set hot water supply temperature is supplied to a general hot water tap by controlling the temperature by mixing hot and cold water. Hot water supply and dishwashing system hot water supply control method. 6. The hot water supply control method for a hot water supply / dishwashing system according to claim 1, wherein a low-temperature water of a set hot water supply temperature is supplied to the tableware cleaning mode and the temperature of the general hot water tap by mixing hot and cold water. A changeover switch capable of mutually switching the control mode between the mode and the mode is provided on the water heater side, and even if the state of the changeover switch is the state of the operation for switching to the general hot water supply mode side, the dishwasher side does not. A hot water supply control method for a hot water supply / dishwashing system, wherein an operation control of a water heater is switched to a dishwashing mode based on transmission information about an operation start operation of the hot water supply. 7. A hot water supply control method for a hot water supply / dishwashing system according to claim 1, wherein a low-temperature water of a set hot water supply temperature is supplied to the dishwashing mode and a temperature control by mixing hot and cold water to the general hot water tap. A hot water heater, which is provided with a changeover switch capable of mutually performing a control mode switching operation between the mode and the mode, and forcibly switching the changeover switch to the dishwashing mode side as a changeover control to the dishwashing mode.・ Hot water supply control method for dishwashing system. 8. The hot water supply control method for a hot water supply / dishwashing system according to claim 1, wherein an operation changeover switch capable of performing an ON / OFF switching operation of the operation of the water heater is provided on the water heater side. Even if the switch is in the OFF state,
A hot water supply / dishware in which the operation changeover switch is forcibly switched to an ON state based on transmission information about an operation start operation on the dishwasher side and the operation control of the water heater is switched to a dishwashing mode. Hot water supply control method for cleaning system. 9. A hot water supply control method for a hot water supply / dish washing system according to claim 7 or 8, further comprising: a notifying means, and the notifying means for notifying the forced switching together with the forced switching by the notifying means. A hot water supply control method for a hot water supply / dishwashing system, wherein the means is controlled. 10. A low-temperature water, which is obtained by branching a tapping side of a heating heat exchanger constituting a water heater and mixing water with high-temperature water discharged from a first branch, to supply hot water to a general hot water tap. A hot water supply control method for a hot water supply / dishwashing system in which high-temperature water discharged from a second branch is supplied to a commercial dishwasher, the flow rate of incoming water entering the heat exchanger. And a mixed water flow rate sensor for detecting a supply flow rate of mixing water supplied for temperature control to the first branch passage, and a mixed water flow rate detected by the mixed water flow rate sensor. Is detected, the temperature of the high-temperature water discharged to the second branch is controlled as the operation control of the water heater when the incoming water flow rate is detected by the incoming water flow rate sensor. Food that controls hot water supply to reach the temperature required for operation Hot water supply control method for water heating and dishwashing system, characterized in that so as to switching control in the cleaning mode. 11. The hot water supply control method for a hot water supply / dishwashing system according to claim 10, wherein the high-temperature water discharged to the second branch path is turned back on the dishwasher side by operating a circulation pump. To the temperature required for the operation of the dishwasher.
A hot water supply control method for a hot water supply / dishwashing system, wherein a dishwashing circuit for maintaining the dishwashing circuit is formed, and a circulation operation by the dishwashing circuit is performed as a dishwashing mode. 12. A hot water supply control method for a hot water supply / dishwashing system according to claim 11, further comprising a circulation flow rate sensor for detecting a circulation flow rate in the dishwashing circulation path, and for controlling operation of the hot water supply apparatus. In contrast, the hot water supply temperature required in each of the plurality of operation modes performed by the operation on the dishwasher including the rinse washing mode is stored in advance, and in the dishwashing mode, the detected incoming water flow rate from the incoming water flow rate sensor and The current operation mode on the dishwasher side is determined by comparison with the detected circulation flow rate from the circulation flow rate sensor,
A hot water supply / dishwashing system for controlling the operation of the water heater so that the temperature of the hot water discharged to the second branch becomes the stored value of the hot water temperature required in the current operation mode determined. Hot water supply control method. 13. A hot water supply control method for a hot water supply / dishwashing system according to claim 12, wherein the high temperature water temperature for detecting the temperature of the high temperature water supplied from the heat exchanger to the dishwasher through the second branch path. A sensor and a notifying unit, wherein when the detected temperature from the high-temperature water temperature sensor is lower than the stored value of the hot water supply temperature required in the determined current operation mode, the notifying unit notifies the sensor. Do
Hot water supply control method for hot water supply and dishwashing system.