JPH10325557A - Auxiliary hot water supplying apparatus connecting unit, and hot water supplying device having solar hot water supplying function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent hot water of a high temperature from being supplied due to a wrong piping of an auxiliary hot water supplying apparatus connecting unit, by detecting the mistake in the piping connection of the auxiliary hot water supplying apparatus connecting unit. SOLUTION: This solar hot water supply connecting unit (auxiliary hot water supplying apparatus connecting unit) C is equipped with an opening/closing valve 62 which can shut off hot water being supplied from a solar hot water supplying apparatus (auxiliary hot water supplying apparatus) B through a solar hot water supplying passage 70, a mixing-adjusting valve 61 which mixes and adjusts the hot water supplied from the solar hot water supplying apparatus B and water supplied from a water source through a water supplying passage 80, and feeds to a water incoming passage 21 of a main hot water supplying apparatus A, a supplied water temperature sensor 64 which detects the temperature of the water being supplied to the water supplying passage 80, and a solar hot water supplying apparatus connecting controller 60 which controls the mixing operation of the hot water and the water by the mixing-adjusting valve 61. By this method, when the supplied water temperature sensor 64 detects a specified temperature or higher continuously for a specified period of time, the hot water supply from the solar hot water supplying apparatus B is shut off by totally closing the opening/closing valve 62, and at the same time, the mixing-adjusting valve 61 is totally opened on the solar hot water supplying passage 70 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary water heater connection unit and a water heater with a solar hot water supply function, and more particularly, to an error in connection of piping of an auxiliary water heater connection unit for connecting a main water heater and an auxiliary water heater. The present invention relates to a technique for detecting a fault and a safe operation at the time of detecting an error in pipe connection.

[0002]

2. Description of the Related Art A hot water supply device with a solar hot water supply function in which a solar water heater (auxiliary water heater) is connected to a main water heater (main water heater) so that hot water from the solar water heater can be used as needed. Has conventionally been provided.

In this type of water heater with a solar water heater, a main water heater and a solar water heater are connected via a solar water heater connection unit (auxiliary water heater connection unit), and the solar water heater is connected to the main water heater. The supplied hot water is supplied to a main hot water supply device by adjusting the flow rate and the mixing ratio with the water by a variable valve or a mixing valve provided in the solar hot water supply connection unit.

[0004] Therefore, the solar hot water supply connection unit has a solar hot water inlet for taking in solar hot water from the solar water heater, a water inlet for taking in water supplied from a water source, and water mixing by the mixing valve and the like. A tap is provided for sending the mixed hot water to a main water heater, and a tubular solar water supply path, a water supply path, and a water supply path of the main water heater are connected to the connection means such as a pipe joint. Are connected and plumbed. And pipe connection work by such connection means is usually
This is done by workers when installing the solar water heater.

[0005]

However, if the various pipes are connected to the solar hot water supply unit manually by the operator, it is impossible to completely eliminate the error in the pipe connection. Therefore, erroneous piping such as connecting the solar hot water supply channel and the water supply channel in reverse or connecting the solar hot water supply channel to both the solar hot water inlet and the water inlet in some cases may occur.

[0006] In particular, when the solar hot water supply path and the water supply path are connected in reverse, when a command to lower the hot water supply temperature is given to the mixing valve, the mixing valve closes the solar water supply and closes the water supply side water supply. However, in this case, since the solar hot water is supplied from the water supply port, there is a problem that the hot water supply temperature to the main water heater cannot be lowered. That is, in this case, it becomes difficult to control the hot water supply temperature, and an unexpectedly high temperature may be supplied from the hot water supply device. Therefore, detection of such erroneous piping and safety measures therefor have been strongly demanded.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above problems, and it is an object of the present invention to detect an erroneous pipe connection of an auxiliary water heater connection unit and to prevent high-temperature tapping due to erroneous piping of the auxiliary water heater connection unit. The main object is to provide a safe hot water supply device with a solar hot water supply function without hot water.

[0008]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 intervenes between a main water heater and an auxiliary water heater to mainly supply hot water from the auxiliary water heater. An auxiliary water heater connection unit for supplying to the water heater side, wherein the auxiliary water heater connection unit is configured to supply hot water supplied from the auxiliary water heater via an auxiliary water supply channel and water supplied from a water source via a water supply channel. , A mixing control valve for mixing and controlling the temperature of water supplied to the main water heater, a feedwater temperature sensor for detecting a temperature of water supplied to the water supply channel, and mixing of hot water and water with the mixing control valve. An auxiliary water heater connection controller for controlling the operation, and when the water supply temperature sensor continuously detects a predetermined temperature or more, the auxiliary water heater connection controller opens the mixing control valve and opens the mixing water control valve on the auxiliary water supply path side fully. That the control configuration And butterflies.

According to the first aspect of the present invention, the temperature of the water supplied from the water source via the water supply passage is detected by the water supply temperature sensor, and when the detected temperature continues to be equal to or higher than the predetermined temperature, The control for fully opening the mixing control valve on the auxiliary hot water supply path side operates. That is, when the auxiliary hot water supply unit and the auxiliary hot water supply channel are connected in reverse, the hot water heated by the auxiliary hot water heater is supplied into the auxiliary hot water supply connection unit. Is higher than the normal case, and the state continues. Therefore, in the invention of claim 1, by detecting this state, an error in the pipe connection is determined, and when it is determined that the pipe connection is incorrect, the mixing control valve is fully opened as a safe operation (that is, the auxiliary hot water supply path side is fully opened). The water supply side is fully opened due to erroneous piping), so that only the water is supplied to the main water heater.

[0010] Here, the "predetermined temperature" and "continuation" mean a temperature sufficient for judging an incorrect pipe connection and its continuation over time.
The temperature and the duration can be appropriately selected such as 10 seconds. This point is the same in the second and subsequent claims.

According to a second aspect of the present invention, there is provided an auxiliary water heater connection unit interposed between the main water heater and the auxiliary water heater to supply hot water from the auxiliary water heater to the main water heater. An on-off valve capable of shutting off hot water supplied from the auxiliary water heater through an auxiliary hot water supply path, and a hot water and water source supplied from the auxiliary water heater downstream of the on-off valve; A mixing control valve for mixing and adjusting the water supplied through the water supply passage from the water supply passage, and sending out the water to the water supply passage of the main water heater.
A water supply temperature sensor for detecting a temperature of water supplied to the water supply passage; and an auxiliary water heater connection controller for controlling a mixing operation of hot water and water by the mixing control valve, wherein the water supply temperature sensor is provided. When the temperature is continuously detected to be equal to or higher than the predetermined temperature, the auxiliary water heater connection controller fully closes the open / close valve to shut off the hot water supply from the auxiliary water heater and fully opens the mixing control valve on the auxiliary water heater side. Characterized in that the control structure described above is provided.

[0012] In the case of the second aspect of the present invention, the method of judging an error in the pipe connection is the same as that in the first aspect. By closing the opening / closing valve provided in the hot water supply path, the structure that also shuts off the flow of water from the auxiliary hot water supply path side, that is, adopts a structure that completely shuts off the flow of water from the auxiliary hot water supply connection unit to the main water heater. I have. That is, by completely blocking the water supply to the main water heater in this way, not only when the auxiliary hot water supply channel and the water supply channel are connected in reverse, but also for both the solar hot water inlet and the water inlet. Is connected, the hot water heated by the auxiliary water heater is prevented from being supplied to the main water heater, and the safe operation is ensured regardless of the type and type of erroneous piping.

According to a third aspect of the present invention, when the auxiliary hot water supply connection controller continuously detects water supply at a predetermined temperature or higher by the water supply temperature sensor, it sends an alarm display request signal to an external alarm means. It is transmitted.
That is, according to the present invention, an error in pipe connection is detected and detected.
If the determination is made, the alarm display request signal is sent to an external alarm means, for example, an alarm means provided in a remote controller of the main water heater, so that an alarm display or an alarm is displayed according to the mode of the alarm means such as the main water heater. The user can be made to recognize the incorrect piping by a sound or the like, and early improvement of the incorrect piping can be expected.

According to a fourth aspect of the present invention, when the water supply temperature sensor continuously detects a predetermined temperature or more, the control operation by the auxiliary water heater connection controller is performed when the mixing control valve is fully opened or near the water supply side. Is performed only in the case of That is, in this type of mixing control valve, usually, when mixing hot water and water, hot water on the auxiliary hot water supply path side may flow into the water supply path side,
If the erroneous piping is detected as it is, the erroneous piping may be erroneously determined due to the flowing hot water. Therefore, in claim 4, in order to prevent such an erroneous determination, the control operation is performed only when the water supply path side is fully opened or near the fully opened state.

According to a fifth and sixth aspect of the present invention, the auxiliary water heater connection unit according to the present invention is provided with a solar water heater using a solar water heater utilizing solar heat as the auxiliary water heater. It is used as a solar water heater connection unit.
And 3.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an auxiliary hot water supply connection unit and a hot water supply device with a solar hot water supply function according to the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows the overall configuration of a hot water supply apparatus with a solar hot water supply function provided with an auxiliary hot water supply function connection unit according to the present invention. As shown in FIG. A, a solar water heater (auxiliary water heater) B, and a solar water heater connection unit (auxiliary water heater connection unit) C are provided as main parts.

The main water heater A mainly heats the hot water supplied from the solar hot water supply connection unit C to a hot water supply set temperature as needed and supplies the hot water to the hot water supply curn 22b, the bathtub 44, and the like. It has a water inlet 21 and a hot water outlet 22 connected to the heat exchange can 10 and a main controller 30 for controlling the main water heater A as a main part. The heat exchange can 10 of the main water heater A is an instantaneous heat exchange can and includes a burner 11 and a finned heat exchanger in which the water inlet 21 and the outlet 22 are connected. An exchange coil 23 is provided,
The hot water supply circuit 20 is constituted by the water inlet 21, the hot water outlet 22, and the heat exchange coil 23.

The water supply passage 21 of the hot water supply circuit 20 is provided with a pump 21a, a water flow switch 21b, a water amount sensor 21c, and a water temperature sensor 21d. A tapping temperature sensor 22a is provided in tapping path 22 of hot water supply circuit 20, and a tapping water curn 22b is provided at an end of tapping path 22. In addition, a bypass 24 having a control valve 24a is provided from the water inlet 21 to the hot water outlet 22 to finely adjust the temperature of the hot water flowing out of the hot water supply curn 22b.

The hot water supply path 22 is provided with a bath drop-off path 25 for supplying hot water to a bathtub 44. The bath drop-off path 25 is provided with a drop-off opening / closing valve 25a. A bath reheating circuit 40 for reheating the hot water (bath water) in the bathtub 44 is connected to the heat exchange can 10. The bath reheating circuit 40 includes a forward path 41 for transporting the bath water heated from the heat exchange can 10 to the bath 44, a return path 42 for returning the bath water from the bath 44 to the heat exchange can 10, Can 10
And a heat exchange coil 43 for performing heat exchange and heating of bathtub water inside the bath.
The hopper receiving part 41 which receives the hot water dropped from 5
a and a three-way switching valve 41b. further,
The return path 42 is provided with a circulation pump 42a, a bath temperature sensor 42b, and a water flow switch 42c.

The main controller 30 controls the operation of the main water heater A by inputting information from each sensor of the main water heater A and a command from the remote controller 50, and is constituted by a microcomputer. . The main controller 30 is a known communication means such as a modem so that the main controller 30 can communicate with the remote controller 50 and with a solar hot water supply connection controller (auxiliary hot water supply connection controller) 60 of the solar hot water connection unit C described later. With
Information is exchanged between them. The main controller 30, the remote controller 50, and the solar hot water connection controller 60 of the solar hot water connection unit C, which will be described later, are wiredly connected by communication transmission lines 101 and 102, and can be communicated in both directions. I have.

The solar hot water supply connection unit C is for connecting a solar hot water supply path 70 from the solar hot water supply B to the main hot water supply A side, and includes a mixing control valve 61 in addition to the solar hot water supply connection controller 60. Have. The mixing control valve 61 has a solar hot water supply path 7 from the solar hot water heater B.
0 is connected to a water supply passage 80 from a water source such as a water supply, and the water supply passage 21 extends from the mixing control valve 61 to the main water heater A. More specifically, the solar hot water supply connection unit C has a connection port (solar hot water supply) for connecting the solar hot water supply path 70, the water supply path 80, and the piping of the water inlet path 21 of the main water heater A to the unit C. A water inlet 91, a water supply port 92, and a water outlet 93) are provided, and the pipes constituting the solar hot water supply path 70 and the like are connected to these connection ports by connection means (not shown) such as a pipe joint. ing.

Then, the solar hot water connection unit C
An on-off valve 62 constituted by an electromagnetic on-off valve or the like is provided in the solar hot water supply path 70, and the hot water from the solar water heater B can be shut off by fully closing the on-off valve 62. I have.

The solar hot water supply path 70 is provided with a solar hot water temperature sensor 63 for detecting the temperature of the hot water supplied from the solar hot water supply B. A water supply temperature sensor 64 for detecting the temperature of water supplied from a water source is provided.
Is provided with a hot water temperature sensor 65 for detecting the temperature of the water flowing out of the mixing control valve 61. The temperature information detected by these temperature sensors 63, 64, 65 is input to the solar hot water supply connection controller 60.

The solar hot water connection controller 60 controls the operation of the solar hot water connection unit C, and is constituted by a microcomputer.
A known communication means such as a modem is provided so as to be able to communicate with the main controller 30 and the like. The mixing ratio of the mixing control valve 61 is adjusted based on information such as the detected temperature information and the control information received from the main controller 30, and the opening and closing operation of the on-off valve 62 can be controlled.

On the other hand, the solar water heater B is a device for supplying hot water using solar heat, and has a known structure. That is, it has a solar heat exchanger 71, a hot water storage tank 72, and the like in addition to the solar hot water supply path 70, and a part of the water supply path 80 is branched and connected to the hot water storage tank 72. A hot water supply path 70 extends. And the solar heat exchanger 7
The medium heated in 1 is introduced into the hot water storage tank 72 and heat exchange heats the water in the hot water storage tank 72 to generate hot water. The hot water in the hot water storage tank 72 passes through the solar hot water supply path 70 and is connected to the solar hot water supply connection unit. C.

Next, the basic hot water supply operation of the hot water supply apparatus with a solar hot water supply function configured as described above will be described first with reference to the flowchart of FIG. 2, and thereafter, the solar hot water supply connection unit (auxiliary hot water supply) according to the present invention. The erroneous piping determination operation and the safety operation when erroneous piping is detected in the device connection unit C will be described with reference to the flowchart of FIG.

A. Basic supply of hot water supply equipment with solar hot water supply function
Hot water operation: (1) First, after confirming that the power of the main water heater A and the solar water heater B is turned on, the power supply (not shown) of the solar water heater connection unit C is turned on to operate the solar water heater connection unit C. In a possible state, and the remote control 5
0 is turned on (step S in FIG. 2)
1). Thereby, based on the instruction of remote controller 50, the hot water supply operation switch on information and the hot water supply set temperature information are communicated from main controller 30 to solar hot water supply connection controller 60.

(2) At this time, the on-off valve 62 for shutting off the flow of water from the solar water heater B is in a fully closed state, and the mixing control valve 61 is in a fully open state on the water side (water supply passage 80 side). Therefore, at this time, the mixing operation of the solar hot water and the water by the mixing control valve 61 is not performed at this time.

(3) Then, the user of the apparatus opens the hot water supply curan 22b on the main water heater A side or the drop-off opening / closing valve 25a for automatic hot water supply, for example, and the water flow switch 21b of the main water heater A turns on the main water heater 21b. When the flow of water equal to or greater than the minimum operating water amount of the water heater A is detected, the minimum operating water amount detection signal (MOQ signal) on the main water heater A side is turned on (step S3 in FIG. 2). This MOQ signal is a signal that is sent out when the minimum operating water amount required to operate the main water heater A is detected. In the present embodiment, as described later, the main water heater A
The operation of the on-off valve 62 and the mixing control valve 61 is controlled using the MOQ signal of the above. Note that this MOQ
The signal generating circuit is a known circuit that is generally provided in a general hot water supply device.

(4) The MOQ signal of the main water heater A is
Similarly to the ON information of the hot water supply operation switch, the main controller 30 of the main water heater A communicates with the solar hot water connection controller 60 of the solar hot water connection unit C.
When this MOQ signal is turned on, the solar hot water connection unit C opens the on-off valve 62 based on a command from the solar hot water connection controller 60 and starts to receive solar hot water from the solar hot water heater B, The control for the control valve 61 is started (step S4 in FIG. 2).

The mixing control valve 61 is controlled by the hot water supply setting temperature information received by the solar hot water connection controller 60, the solar hot water temperature information from the solar hot water temperature sensor 63, and the water supply temperature information from the hot water temperature sensor 64. It is performed based on. That is, the solar hot water supply connection controller 60, based on these information,
The mixing ratio of the mixing control valve 61 is calculated in order to set the temperature of the solar hot water to be sent to the main water heater A to the hot water supply set temperature, and the calculated mixing ratio is used as an operation command as the mixing control valve 61.
To communicate.

Also, a solar hot water connection controller 60
If the temperature of the hot water supply can be adjusted to the hot water supply set temperature using the solar hot water in the calculation of the mixing ratio, that is, if the solar hot water temperature is higher than the hot water set temperature, the main controller 30 A signal indicating that the operation is unnecessary (combustion operation unnecessary command signal) is returned. When the main controller 30 receives this combustion operation unnecessary command signal,
The main water heater A does not perform the combustion operation, and starts hot water supply only with the hot water supplied from the solar hot water supply connection unit C. That is, in the present embodiment, when there is no return of the combustion operation unnecessary signal from the solar hot water supply connection controller 60, or when the solar hot water temperature is lower than the hot water supply set temperature, a signal requesting the combustion operation from the solar hot water connection controller 60 is issued. The main controller 3 only when
Since 0 causes the burner 11 of the heat exchange can 10 of the main water heater A to perform the combustion operation, the main water heater A can perform the efficient combustion operation without waste.

Even if the main water heater A does not initially perform the combustion operation, if the hot water set temperature is changed during the operation of the present apparatus, the changed hot water set temperature information is sent from the main controller 30. Since the information is communicated to the solar hot water connection controller 60 and the information is shared between the main controller 30 and the solar hot water connection controller 60, the solar hot water connection controller 60 controls the mixing control valve 61 based on the new hot water supply set temperature. Control is performed, and if necessary, the main water heater A also starts the combustion operation.

(5) If the MOQ signal of the main water heater A is not turned on while the hot water supply operation switch is turned on, the on-off valve 62 of the solar hot water supply connection unit C is fully closed and the mixing adjustment is performed. The valve 61 continues the standby state when the water side is fully opened (step S5 in FIG. 2).

When a non-heated water supply request (water request signal), that is, water is requested by the remote controller 50, the main controller 30 communicates the water request signal to the solar hot water supply connection controller 60. The solar hot water supply connection controller 60 that has received the water request signal controls the operation of the mixing control valve 61 so as to be in the water side fully open state. Therefore, even when the solar water heater B is connected to the main water heater A, it is possible to appropriately supply water according to a request of the device user.

B: Wrong piping judgment operation and safe operation:
Next, an operation for determining erroneous piping in the hot water supply apparatus with a solar hot water supply function according to the present invention and a safe operation at that time will be described.

That is, as described above, since the pipe connection work to the solar hot water inlet port 91 and the water supply port 92 is usually performed manually by an operator, it should be connected to these connection ports 91 and 92 by mistake. In some cases, the solar hot water supply path 70 and the hot water supply path 80 are connected in reverse, or the solar hot water supply path 70 is connected to both of the connection ports 91 and 92.

(1) In such a case, the remote controller 5
When the hot water supply operation switch 0 is turned on (step S1 in FIG. 3), first, the solar hot water supply connection controller 60 determines whether or not the MOQ signal in the main water heater A is on (step S2 in FIG. 3). . That is, M
By determining whether the OQ signal is on or off, it is determined whether or not the main water heater A has detected the flow of water equal to or greater than the minimum operating water amount. If there is water flow, the flow proceeds to the next step S3, and the flow proceeds to step S3. If there is no water, the process returns to step S2.

(2) Then, when there is water flow in the main water heater A, the on-off valve 62 is opened and the supply of solar hot water from the solar water heater B is started (step S3 in FIG. 3), and the mixing is adjusted. The valve 61 starts the mixing operation of the solar hot water and the water.

(3) Next, it is determined whether or not the mixing operation of the mixing control valve 61 is fully open on the water supply channel 80 side (step S4 in FIG. 3). This is because, when the solar hot water supply path 70 side is opened in the mixing control valve 61, the solar hot water supplied from the solar hot water supply path 80 may flow into the hot water supply path 80 in a normal case. Therefore, when an operation for detecting erroneous piping described below is performed in this state, the water supply temperature sensor 64 detects an increase in the water temperature on the water supply passage 80 side due to the solar hot water flowing from the solar hot water supply passage 70, thereby erroneously detecting erroneous piping. In order to avoid such a situation, the state of the water supply channel 80 side fully open, that is, the state of the solar hot water supply channel 70 side fully closed is detected.

In connection with this, in the present embodiment, the configuration is such that the process proceeds to the next step only when the MOQ signal is ON in step S2 in FIG. Even when the hot water supply path 70 is fully closed, the solar hot water slightly leaks from the solar hot water supply path 70 to the water supply path 80 in the mixing control valve 61. Therefore, particularly in the configuration shown in FIG. 1 in which the water supply passage 80 is disposed vertically in the solar hot water supply connection unit C and the water supply temperature sensor 64 is disposed above the mixing control valve 61. In the present embodiment, the solar hot water flowing into the water supply channel 80 naturally flows through the water supply channel 80, and the detection temperature of the water supply temperature sensor 64 may rise to erroneously detect erroneous piping. , The MOQ signal is on, and the mixing control valve 61 causes the water supply passage 80 to be fully opened, that is, only when water is supplied to the water supply passage 80 side only. It avoids erroneous detections caused by leaking hot solar water.

(4) The mixing control valve 61 is connected to the water supply passage 80.
If the side is fully open, the process proceeds to step S5 in FIG. 3 to start detection of erroneous piping. If the water supply channel 80 is not fully opened, the mixing control valve 61 is almost fully opened in step S6 in FIG. (That is, near the water supply channel 80 side fully open)
It is determined whether or not it is near the fully opened state. If it is determined that it is not near the fully opened state, the process proceeds to step S5. Here, the mixing control valve 61
Is configured to start the erroneous pipe detection operation also when the water supply channel 80 is near the fully open state. When the water supply channel 80 is near the fully open position, the water flows from the solar hot water supply line 70 to the water supply line 80 side. This is because the influence of the solar hot water on the feedwater temperature sensor 64 is small, and there is no problem due to the natural convection described above, so that there is little risk of erroneously determining that the piping is erroneous. More specifically, it is set appropriately within a range that can empirically ensure the accuracy of erroneous pipe detection.

(5) The mixing control valve 61 is connected to the water supply passage 80.
If it is determined that the side is fully open or near full open, the temperature detected by the water supply temperature sensor 64 provided in the water supply passage 80 is maintained at a predetermined temperature or higher (50 ° C. or higher in the illustrated example) for a predetermined time (in the illustrated example). It is determined whether or not the detection has been performed for 10 seconds (step S5 in FIG. 3). If this state is detected, it is determined that the piping is erroneous, and the safety operation shown in step S6 in FIG. 3 is started. If no erroneous piping is detected, the process returns to step S2 in FIG.

That is, as described above, if there is an error in the connection of the pipes to the solar hot water inlet 91 and the water inlet 92, the solar hot water is supplied from the water inlet 92. The temperature is the temperature of the solar hot water. Therefore, step S in FIG.
In No. 5, this state is detected as a temperature equal to or higher than a predetermined temperature, and if this state continues for a predetermined time, it is determined that the piping is erroneous. Here, the continuation of the predetermined time is used as an element of the erroneous piping determination, for example, when the detection signal from the feedwater temperature sensor 64 apparently temporarily detects a predetermined temperature or higher due to the influence of noise or the like. It is because it does not judge. Therefore, the predetermined temperature and the predetermined time in the detection of erroneous piping can be appropriately set and changed according to the performance (specifically, the hot water supply temperature) of the auxiliary water heater used, the influence of noise, and the like. In this case, if the predetermined time is set too long, the accuracy of the erroneous piping detection is improved, but if there is an erroneous piping, the water supply path 8
Since 0 to solar hot water is supplied to the main water heater A for a long time, it is preferable to set the range within a range that does not become too long.

(6) When the erroneous piping is determined in this way, in the solar hot water supply connection controller 60, as shown in step S6 in FIG. The solar hot water path 70
A control command (safe operation) for fully opening the water supply side (that is, fully closing the water supply channel 80 side) is issued, and an alarm display request signal is sent to the main controller 30 of the main water heater A, for example, the main water heater A or the like. An alarm such as an alarm display or an alarm sound is displayed on an alarm unit (not shown) provided on the remote controller 50. That is, in the present embodiment, when an erroneous pipe is detected, the flow of water to the main water heater A is completely shut off, and an alarm indicating the erroneous pipe is issued. It is possible to avoid danger and allow the user of the apparatus to recognize the presence of erroneous piping.

The above-described embodiment merely shows a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope.

For example, in the above embodiment, the on-off valve 62 is fully closed as a safety operation when an erroneous pipe is detected. However, the on-off valve 62 is not closed, and only the mixing control valve 61 is fully opened on the solar hot water supply path 70 side. It is also possible to adopt a configuration that does the following. That is, in the case where the solar hot water supply channel 70 and the water supply channel 80 are connected in reverse to the solar hot water inlet 91 and the water supply port 92, water from the water source is supplied to the solar hot water inlet 91 on the solar water supply channel 70 side. In this case, hot water is not supplied to the main water heater A even if the mixing control valve 61 is fully opened on the solar water supply path 70 side, and there is no danger to the user.

In the above embodiment, a solar water heater is used as an auxiliary water heater. However, other types of water heaters can be used as the auxiliary water heater, and a main alarm device can be used. Although the remote control 50 of the water heater A is used, an alarm means such as a home controller in home automation which is separate from the water heater can also be used.

The heat exchange can 10 of the main water heater A includes
It is not always necessary to connect a bath heating facility such as the bath reheating circuit 40. On the other hand, the main water heater A may be provided with another heating circuit or other circuits.

Further, in the present embodiment, the heat exchange can 10 is of an instant heating type, but may be a so-called semi-hot water storage type heat exchange can. In this case, hot water supply circuit 2
Instead of the heat exchange coil 23 of 0, a relatively small hot water tank, that is, a semi-hot water tank is arranged, and the water in the hot water tank is heated and used for hot water supply. The heat exchange coil 43 and the like of the other bath reheating circuit 40 are heat-exchanged and heated by the hot water in the semi-hot water storage tank.

The burner 11 may be an oil burner or a gas burner. The type of burner does not matter.

[0053]

As described above in detail, according to the auxiliary water heater connection unit according to the present invention, when the water supply temperature sensor continuously detects a predetermined temperature or more, it is determined that the piping is erroneous, and the predetermined safety is ensured. Since the operation is performed, it is possible to avoid the danger that the user of the hot water supply device suffers due to erroneous piping when installing the auxiliary water heater connection unit. In addition, detection of erroneous piping is limited to the case where the temperature of the supply water temperature sensor is continuously detected to be equal to or higher than a predetermined temperature, so that even when the detection signal of the supply water temperature sensor includes noise or the like, the erroneous piping is accurately detected. can do.

According to the third aspect of the present invention, when an erroneous pipe is detected, an alarm display request signal is sent to an external alarm means, so that the user of the water heater can immediately determine the presence of the erroneous pipe. Since it can be recognized, erroneous piping can be improved at an early stage.

According to the fourth aspect of the present invention, erroneous piping is detected only when the mixing control valve is fully opened or near the fully opened state on the water supply channel side, so that hot water is supplied from the auxiliary hot water supply channel side to the water supply channel side. Erroneous detection due to the inflow can be substantially eliminated.

Further, according to the fifth and sixth aspects of the present invention, it is possible to provide a safe hot water supply apparatus with a solar hot water supply function without danger due to erroneous piping.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a water heater with a solar water heating function using an auxiliary water heater connection unit according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a basic hot water supply operation of the hot water supply apparatus with a solar hot water supply function.

FIG. 3 is a flowchart illustrating detection of erroneous piping and safe operation of the hot water supply apparatus with a solar hot water supply function.

[Explanation of symbols]

Reference Signs List A main water heater B solar water heater (auxiliary water heater) C solar water heater connection unit (auxiliary water heater connection unit) 10 heat exchange can body 20 water heater circuit 21 water inlet channel 22 water outlet channel 30 main controller 40 hot water recirculation circuit 50 remote controller Reference Signs List 60 hot water supply connection controller 61 mixing control valve 62 on-off valve 63, 65 solar hot water temperature sensor 64 hot water temperature sensor 70 solar hot water path (auxiliary hot water path) 80 water supply path

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazunori Hasegawa 93 Noritsu, Edo-cho, Chuo-ku, Kobe-shi, Hyogo

Claims (6)

[Claims] 1. An auxiliary water heater connection unit interposed between a main water heater and an auxiliary water heater to supply hot water from the auxiliary water heater to a main water heater side, wherein the auxiliary water heater connection unit is provided. A mixing control valve for mixing and adjusting the hot water supplied from the auxiliary water heater through the auxiliary water supply path and the water supplied from the water source through the water supply path, and sending the mixed water to the water supply path of the main water heater; A water supply temperature sensor for detecting the temperature of water supplied to the water supply channel, and an auxiliary water heater connection controller for controlling a mixing operation of hot water and water at the mixing control valve, the water supply temperature sensor comprising: An auxiliary water heater connection unit, characterized in that the auxiliary water heater connection controller has a control structure in which, when the temperature is continuously detected to be equal to or higher than a predetermined temperature, the mixing water control valve fully opens the mixing control valve. 2. An auxiliary water heater connection unit interposed between a main water heater and an auxiliary water heater to supply hot water from the auxiliary water heater to the main water heater side, wherein the auxiliary water heater connection unit is provided. An on-off valve capable of shutting off hot water supplied from the auxiliary water heater via an auxiliary hot water supply path, and a hot water supplied from the auxiliary water heater and a water source supplied downstream from the auxiliary hot water supply via a water supply path. A mixing control valve that mixes and adjusts the water to be supplied to the water inlet of the main water heater, a water supply temperature sensor that detects a temperature of water supplied to the water supply channel, and hot water and water at the mixing control valve. And an auxiliary water heater connection controller for controlling the mixing operation with the water heater. When the water temperature sensor continuously detects a predetermined temperature or higher, the auxiliary water heater connection controller fully closes the on-off valve. To interrupt the hot water supply from the auxiliary water heater. As well as the auxiliary water heater connection unit, characterized in that it comprises a control arrangement for the mixing control valve and the auxiliary water heater roadside fully open. 3. The auxiliary water heater connection controller sends an alarm display request signal to an external alarm means when the water supply temperature sensor continuously detects water passing at a predetermined temperature or higher. The auxiliary water heater connection unit according to claim 1 or 2. 4. The control operation by the auxiliary water heater connection controller when the feed water temperature sensor continuously detects a predetermined temperature or higher is performed only when the mixing control valve is fully opened or near the fully opened state. The auxiliary water heater connection unit according to claim 1 or 2, wherein: 5. A main water heater having a water inlet and a water outlet connected to a heat exchange can body, a solar water heater using solar heat, and a solar water heater from the solar water heater being connected to the main water heater. A solar water heater with a solar water heater connection unit connected to the solar water heater, wherein the auxiliary solar water heater connection unit is capable of shutting off hot water supplied from the solar water heater through a solar water heater. A mixing control valve that mixes and controls hot water supplied from the solar water heater and water supplied from a water source via a water supply passage to a downstream side of the on-off valve to send the water to an inlet passage of a main water heater. A water supply temperature sensor for detecting a temperature of water supplied to the water supply passage, and a solar water heater connection controller for controlling a mixing operation of hot water and water by the mixing control valve, wherein the water supply temperature When the sensor continuously detects a temperature equal to or higher than a predetermined temperature, the control valve is fully closed to shut off hot water supply from the solar water heater and to fully open the mixing control valve to the solar hot water supply path side. A hot water supply device with a solar hot water supply function. 6. The solar water heater connection controller sends an alarm request signal to alarm means of a main water heater when the water supply temperature sensor continuously detects water passing at a predetermined temperature or higher. The hot water supply apparatus with a solar hot water supply function according to claim 5.