JP4013612B2 - Hot water system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water supply system, and is particularly effective when applied to a hot water supply system including a hot water storage tank that generates hot water using a heat pump (vapor compression refrigerator) and stores the generated hot water.
[0002]
[Prior art and problems to be solved by the invention]
For example, in the invention described in Japanese Patent Application Laid-Open No. 2000-283555, when an abnormality occurs in the hot water supply system, an error code indicating the abnormality content is displayed on the display screen of the remote control device operated by the user.
[0003]
In addition, when an abnormality occurs in the hot water supply system, the hot water supply system is automatically restarted a predetermined number of times, and an error code indicating the content of the abnormality is displayed only if the abnormality is not resolved even after the predetermined number of restarts. There is also a hot water system. Hereinafter, this hot water supply system is referred to as a hot water supply system with an automatic retry function.
[0004]
By the way, as an abnormality that occurs in the hot water supply system, for example, an abnormality in which foreign matter such as dust is clogged in the hot water supply circuit, usually, the abnormality is often resolved by restarting several times.
[0005]
Therefore, if it is a hot water supply system with an automatic retry function, it is possible to automatically restore the hot water supply system without displaying an abnormality for such a minor abnormality to the user. Usability can be improved.
[0006]
However, in a hot water supply system with an automatic retry function, if an abnormality occurs for the first time if the abnormality is not resolved even after restarting a specified number of times, a serious abnormality that cannot be recovered by restarting occurs. However, it takes a relatively long time from when an abnormality occurs until an error code indicating the actual content of the abnormality is displayed.
[0007]
For this reason, for example, when the operation of the hot water supply system is inspected by actually operating the hot water supply system after completing the installation work of the hot water supply system, the actual content of the abnormality is present regardless of whether a serious abnormality has occurred. Because it takes a relatively long time to display an error code indicating, there is a risk that the operation inspection will be completed without the contractor noticing the abnormality, and the hot water supply system with a severe abnormality may be delivered to the user There is.
[0008]
In view of the above, the present invention firstly provides a new hot water supply system different from the conventional one, and secondly, prevents a hot water supply system in which a severe abnormality has occurred from being handed over to a user. And
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, in the hot water supply system including the hot water supply device (30) for supplying hot water, whether or not it is immediately after the hot water supply device (30) is installed. After the construction is judged immediately after construction (S40) and the occurrence of an abnormality in the hot water supply device (30), the hot water supply device (30) is stopped for a predetermined time, and then the hot water supply device (30) is restarted. When the hot water supply device (30) is determined to be immediately after installation by the restarting means (S30) and the immediately after construction determining means (S40), the hot water supply device (30) is restarted by the restarting means (S30). And a notification means (S50) for notifying that the hot water supply device (30) is restarted.
[0010]
As a result, an abnormality has occurred when the operation of the hot water supply system is inspected by actually operating the hot water supply system after completing the installation work of the hot water supply system while providing a new hot water supply system different from the conventional one. The contractor can reliably recognize this.
[0011]
Therefore, it is possible to prevent a problem that the operation inspection is completed without the contractor noticing the serious abnormality and the hot water supply system in which the severe abnormality has occurred is handed over to the user.
[0012]
As a result, as a hot water supply system with an automatic retry function, it is possible to improve the usability of the hot water supply system and prevent a problem that a hot water supply system with a severe abnormality is handed over to the user.
[0013]
In the invention according to claim 2, in the hot water supply system provided with the hot water supply device (30) for supplying hot water, immediately after the construction determining means (S40) for determining whether or not it is immediately after the hot water supply device (30) is installed, When it is detected that an abnormality has occurred in the hot water supply device (30), the hot water supply device (30) is stopped for a predetermined time and then restarted (S30) for restarting the hot water supply device (30), and immediately after construction When it is determined by the means (S40) that the hot water supply device (30) has just been installed, when the hot water supply device (30) is restarted by the restarting means (S30), the hot water supply device (30) is restarted. On the other hand, when it is determined not immediately after the hot water supply device (30) is installed by the immediately after construction determination means (S40), the hot water supply device (30) is restarted by the restarting means (S30). in case of Characterized in that it comprises a notifying means (S50) without notifying to restart the water heater (30).
[0014]
Thereby, after finishing the installation construction work of the hot water supply system, when actually operating the hot water supply system and inspecting the operation of the hot water supply system, the contractor can surely recognize that an abnormality has occurred. .
[0015]
Therefore, it is possible to prevent a problem that the operation inspection is completed without the contractor noticing the serious abnormality and the hot water supply system in which the severe abnormality has occurred is handed over to the user.
[0016]
As a result, as a hot water supply system with an automatic retry function, it is possible to improve the usability of the hot water supply system and prevent a problem that a hot water supply system with a severe abnormality is handed over to the user.
[0017]
In the invention according to claim 3, when it is detected that an abnormality has occurred in the hot water supply device (30) even when the hot water supply device (30) is restarted a predetermined number of times or more, the hot water supply device (30) is While notifying that abnormality has occurred, it is provided with the hot water supply apparatus stop means (S60-S80) which stops restart of the hot water supply apparatus (30).
[0018]
Moreover, in invention of Claim 4, the memory | storage means (44) which memorize | stores the control data of a hot-water supply apparatus (30) is provided, Furthermore, the memory | storage means (44) controls the immediately after construction determination means (S40). When the measurement time starting from the start of data recording is within a predetermined time, it is determined that the hot water supply device (30) has just been installed, and the measurement time exceeds the predetermined time. Sometimes it is determined that it is not immediately after the hot water supply device (30) is installed.
[0019]
Further, in the invention according to claim 5, the immediately after construction determination means (S40) starts to measure the measurement time from when the voltage of the power source supplying power to the storage means (44) becomes equal to or higher than a predetermined voltage. It is a feature.
[0020]
In the invention according to claim 6, the immediately after construction determining means (S40) determines that it is immediately after installing the hot water supply device (30) when the accumulated operation time of the hot water supply device (30) is within a predetermined time. When the accumulated operation time exceeds a predetermined time, it is determined that it is not immediately after the hot water supply device (30) is installed.
[0021]
Moreover, in invention of Claim 7, the memory | storage means (44) which memorize | stores the control data of a hot-water supply apparatus (30) is provided, Furthermore, the construction immediately determination means (S40) is electric power to a memory | storage means (44). The cumulative operation time starts to be measured when the voltage of the power source for supplying the voltage becomes equal to or higher than a predetermined voltage.
[0022]
Further, as in the eighth aspect of the invention, an error message displayed when an abnormality occurs in the hot water supply device (30) is displayed as an indication to restart the hot water supply device (30) notified by the notification means (S50). If the display is related to the display, the user or the contractor can easily recognize the abnormality.
[0023]
Incidentally, the reference numerals in parentheses of each means described above are an example showing the correspondence with the specific means described in the embodiments described later.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic diagram of a hot water supply system according to the present embodiment. This hot water supply system generally includes a heat pump unit 10 that forms a heater for heating hot water, and a hot water supply device 30 that includes a hot water storage unit 20 having a hot water storage tank 21 that retains and stores water heated by the heat pump unit 10. In addition, the electronic control device 40 is configured to control the hot water supply device 30.
[0025]
Here, as is well known, the heat pump unit 10 is a vapor compression refrigerator that moves low-temperature heat to a high-temperature side. The compressor 11, a water-refrigerant heat exchanger 12 that exchanges water and refrigerant, and a capillary A decompressor 13 such as a tube or an expansion valve, an evaporator 14 that evaporates the refrigerant and absorbs heat from outdoor air, a gas-liquid separator 15 such as an accumulator that stores excess refrigerant and supplies gas-phase refrigerant to the compressor 11, and evaporation The air blower 14a etc. which ventilate external air to the unit 14 are comprised.
[0026]
In this embodiment, carbon dioxide is used as the refrigerant, and the refrigerant pressure on the high pressure side, that is, the pressure in the water-refrigerant heat exchanger 12 is increased to the critical pressure of the refrigerant or higher, and the refrigerant discharge temperature is increased to 90 ° C. or higher. Raised.
[0027]
The outlet temperature sensor 16a is a water temperature detecting means for detecting the temperature of the water flowing out from the water refrigerant heat exchanger 12, and the pressure sensor 16b is a high pressure refrigerant pressure in the heat pump unit 10 (in this embodiment, water refrigerant heat exchange). Pressure detecting means for detecting the pressure of the refrigerant flowing out of the vessel 12.
[0028]
The pump 17 is provided in a water pipe 18 that connects the hot water storage tank 21 and the water refrigerant heat exchanger 12, and causes water to flow between the hot water storage tank 21 and the water refrigerant heat exchanger 12. The compressor 11 and the blower 14a are electrically operated.
[0029]
And the 1st-3rd tank warm water temperature sensor 22a-22c which detects the warm water temperature in the hot water storage tank 21 is affixed on the outer surface of the hot water storage tank 21 in order from the upper side of the hot water storage tank 21. Based on the detected temperatures of the first to third tank hot water temperature sensors 22a to 22c, the detected temperature of the outlet water temperature sensor 16a, the detected pressure of the pressure sensor 16b, the hot water supply temperature set by the user, and the like. The blower 14a and the pump 17 are controlled.
[0030]
FIG. 2 is a block diagram showing the circuit configuration of the electronic control unit 40. The drive circuit 41 of the heat pump unit 10, the detected temperatures of the first to third tank hot water temperature sensors 22a to 22c, and the detected water temperature sensor 16a. The circuit 42 for judging the operating state of the heat pump unit 10 by inputting the temperature, the detected pressure of the pressure sensor 16b and the hot water supply temperature set by the user, the water stop valve 19b with a check valve, the water stop valve 19c, etc. (see FIG. 1) ) Other functional components driving circuit 43, operation history of hot water supply device 30, that is, storage circuit 44 for storing control data, rechargeable power supply 45 such as a supercapacitor for supplying power to storage circuit 44, and these circuits This is composed of an arithmetic circuit 46 for summarizing 41 to 45 and the like.
[0031]
Moreover, in FIG. 1, the water stop valve 19a, the water stop valve 19b with a check valve, and the water stop valve 19c are closed at the time of construction work which installs a hot water supply system, and are opened after completion of construction.
[0032]
Incidentally, the water stop valve 19a and the water stop valve 19b with a check valve are provided in the water pipe 18 to prevent the flow of hot water for construction work, and the water stop valve 19c This is a valve that opens and closes a hot water supply pipe 19d for supplying hot water supply water to the hot water storage tank 21 from the water supply.
[0033]
Next, the characteristic operation of the hot water supply system according to this embodiment will be described.
[0034]
1. Normal operation mode (warm water generation mode)
Among the first to third tank warm water temperature sensors 22a to 22c, in particular, when the temperature detected by the first tank warm water temperature sensor 22a is equal to or lower than a predetermined temperature, or the amount of warm water in the hot water storage tank 21 is decreased to supply water. This mode is executed when low-temperature water is supplied to the hot water storage tank 21 from the water stop valve 19c.
[0035]
Specifically, the hot water supply water is heated by operating the compressor 11, the blower 14a, and the pump 17 so that the temperature detected by the water temperature sensor 16a becomes a predetermined temperature (for example, 85 ° C.). Hot water is supplied to the upper side of the hot water storage tank 21.
[0036]
And when the water temperature in the hot water storage tank 21, especially the detection temperature of the 3rd tank warm water temperature sensor 22c becomes more than predetermined temperature, the compressor 11, the air blower 14a, and the pump 17 are stopped.
[0037]
In addition, the heat pump unit 10 gives the heat absorbed from the outdoor air by evaporating the refrigerant in the evaporator 14 and the heat amount corresponding to the compression work of the compressor 11 to the water for hot water supply in the water / refrigerant heat exchanger 12. .
[0038]
2. Abnormal mode (retry mode)
This mode is used in any part or device of the hot water supply device 30 in the normal operation mode or when the hot water supply system is actually operated and the operation of the hot water supply system is inspected after the installation work of the hot water supply system is completed. This mode is executed when an abnormality occurs.
[0039]
Specifically, when the electronic control unit 40 detects that an abnormality has occurred in the hot water supply device 30, the electronic control device 40 tries to restart the hot water supply device 30 a predetermined number of times after stopping the hot water supply device 30 for a predetermined time. Hereinafter, this action is referred to as retry operation.
[0040]
At this time, when the electronic control unit 40 determines that the hot water supply device 30 has just been installed, the electronic control device 40 displays information indicating that the hot water supply device has failed and is being retried. To inform the contractor and user.
[0041]
Note that the information displayed at this time includes an error code (for example, error 130) that means “retry operation is occurring due to an abnormality in the hot water supply apparatus”.
[0042]
On the other hand, when the electronic control unit 40 determines that it is not immediately after the hot water supply device 30 is installed even during the retry operation, an error code indicating the content of the abnormality is provided only if the abnormality is not resolved even after a predetermined number of restarts. (For example, error 30) is displayed.
[0043]
At this time, an error code (error 130) indicating that an abnormality has occurred in the hot water supply device 30 and is being retried is displayed when an abnormality has occurred in the hot water supply device (30) as in this embodiment. It is desirable to make the display relevant to the error code (error 30).
[0044]
Further, in the present embodiment, immediately after the hot water supply device 30 is installed when the measurement time when the storage circuit 44 starts measuring and starting the recording of control data is within a predetermined time (for example, 4 hours). When the measurement time exceeds a predetermined time, it is determined that it is not immediately after the hot water supply device 30 is installed.
[0045]
In this embodiment, as shown in FIG. 3, when the voltage of the power supply 45 for the storage circuit becomes equal to or lower than a predetermined voltage, the control data is erased and the storage circuit is reset to the initial state. Time measurement starts when the control data is erased and the storage circuit is reset to the initial state, that is, when a predetermined voltage is applied to the storage power supply 45.
[0046]
Incidentally, the flowchart shown in FIG. 3 is automatically executed every predetermined time after the main power switch of the hot water supply system is turned on.
[0047]
FIG. 4 is a flowchart showing a schematic operation of the hot water supply system according to the present embodiment. In the normal operation mode, for example, an abnormality occurs in the hot water supply device 30 due to, for example, an abnormally high temperature detected by the outlet temperature sensor 16a. When it is done (S10, S20), it tries to restart (retry) and determines whether it is immediately after construction (S30, S40).
[0048]
Incidentally, as the cause of the abnormally high temperature detected by the water discharge temperature sensor 16a, forgetting to open the water stop valve 19a (construction error), clogging of the water pipe 18 or the like can be considered.
[0049]
When it is determined that it is immediately after installing the hot water supply device 30, retry is made a predetermined number of times while performing information (retry display) indicating that “the abnormality has occurred in the hot water supply device and being in retry operation” (S 50).
[0050]
Next, if the abnormality of the hot water supply device 30 is not resolved even after retrying a predetermined number of times, the hot water supply device 30 is notified that an abnormality has occurred, and the restart of the hot water supply device 30 is stopped to stop the hot water supply system. (S60 to S80).
[0051]
Next, the effect of this embodiment is described.
[0052]
In this embodiment, when it is determined that it is immediately after installing the hot water supply device 30, a retry is attempted while performing information (retry display) indicating that “the abnormality has occurred in the hot water supply device and is being retried.” After the system installation work is completed, when the hot water supply system is actually operated and the operation of the hot water supply system is inspected, the contractor can surely recognize that an abnormality has occurred.
[0053]
Therefore, it is possible to prevent a problem that the operation inspection is completed without the contractor noticing the serious abnormality and the hot water supply system in which the severe abnormality has occurred is handed over to the user.
[0054]
As a result, as a hot water supply system with an automatic retry function, it is possible to improve the usability of the hot water supply system and prevent a problem that a hot water supply system with a severe abnormality is handed over to the user.
[0055]
(Other embodiments)
In the above-described embodiment, the measurement time when the storage circuit 44 starts measuring and starting recording control data is determined to be immediately after the hot water supply device 30 is installed when the measurement time starts within a predetermined time. When the measured time exceeds the predetermined time, it is determined that it is not immediately after the hot water supply device 30 is installed, but when the accumulated operation time of the hot water supply device 30 is within the predetermined time, it is determined that it is immediately after the hot water supply device 30 is installed. When the accumulated operation time exceeds a predetermined time, it may be determined that the hot water supply device 30 is not immediately after being installed.
[0056]
In this case, the accumulated operation time may be started when the voltage of the power supply 45 that supplies power to the storage circuit 44 becomes equal to or higher than a predetermined voltage.
[0057]
Further, in the above-described embodiment, the time for determining whether or not it is immediately after the construction has started to be measured with reference to the time when the voltage of the power supply 45 that supplies power to the storage circuit 44 becomes equal to or higher than a predetermined voltage. This embodiment is not limited to this. For example, when a switching means for indicating the completion of construction such as a construction completion switch is provided and this switching means is turned on, it is regarded as immediately after construction and a retry display is displayed. You may make it perform.
[0058]
In determining whether it is immediately after construction, for example, after boiling the water in the hot water storage tank 21 at least once, it may be regarded as not immediately after construction.
[0059]
Here, boiling the water in the hot water storage tank 21 means that the normal operation mode is performed, the water temperature in the hot water storage tank 21 becomes equal to or higher than a predetermined temperature, and the compressor 11, the blower 14a, and the pump 17 are stopped. Say that.
[0060]
Further, the error display is not limited to display by code.
[0061]
In the above-described embodiment, the first to third tank hot water temperature sensors 22 a to 22 c are installed on the outer surface of the hot water storage tank 21, but the present invention is not limited to this, and the first to third tanks in the hot water storage tank 21 In-tank hot water temperature sensors 22a to 22c may be installed.
[0062]
Moreover, in the above-mentioned embodiment, although the refrigerant | coolant of the heat pump unit 10 was carbon dioxide, this invention is not limited to this, For example, Freon, hydrocarbon, nitrogen, etc. may be used. However, when chlorofluorocarbon is used as the refrigerant, the pressure on the high pressure side is less than the critical pressure of the refrigerant.
[0063]
Moreover, in the above-mentioned embodiment, although the heat pump unit was employ | adopted as a heater, this invention is not limited to this, A sheathed heater, a combustor, etc. may be used.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a hot water supply system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a control system of the hot water supply system according to the embodiment of the present invention.
FIG. 3 is a flowchart showing power supply voltage detection control in the hot water supply system according to the embodiment of the present invention.
FIG. 4 is a flowchart showing control of the hot water supply system according to the embodiment of the present invention.
[Explanation of symbols]
10 ... Heat pump unit, 11 ... Compressor, 12 ... Water refrigerant heat exchanger,
13 ... decompressor, 14 ... evaporator, 15 ... accumulator,
16a ... Water temperature sensor, 16b ... Pressure sensor, 17 ... Pump,
18 ... Water piping, 20 ... Hot water storage unit, 21 ... Hot water storage tank,
22a to 22c ... warm water temperature sensor in the tank.

Claims (8)

In a hot water supply system comprising a hot water supply device (30) for supplying hot water,
Immediately after construction determining means (S40) for determining whether or not it is immediately after the hot water supply device (30) is installed,
Restarting means (S30) for restarting the hot water supply device (30) after stopping the hot water supply device (30) for a predetermined time when it is detected that an abnormality has occurred in the hot water supply device (30);
When the hot water supply device (30) is restarted by the restarting means (S30) when it is determined immediately after the hot water supply device (30) is installed by the immediately after construction determining means (S40), A hot water supply system comprising a notification means (S50) for notifying that the hot water supply device (30) is restarted. In a hot water supply system comprising a hot water supply device (30) for supplying hot water,
Immediately after construction determining means (S40) for determining whether or not it is immediately after the hot water supply device (30) is installed,
Restarting means (S30) for restarting the hot water supply device (30) after stopping the hot water supply device (30) for a predetermined time when it is detected that an abnormality has occurred in the hot water supply device (30);
When the hot water supply device (30) is restarted by the restarting means (S30) when it is determined immediately after the hot water supply device (30) is installed by the immediately after construction determining means (S40), When the hot water supply device (30) is notified that the hot water supply device (30) is to be restarted, the restarting means (S30) is determined when the hot water supply device (30) is not immediately installed by the immediately after construction determining means (S40). ), When the hot water supply device (30) is restarted, the hot water supply system is provided with notifying means (S50) that does not notify that the hot water supply device (30) is restarted. Even when the hot water supply device (30) is restarted a predetermined number of times or more, when it is detected that an abnormality has occurred in the hot water supply device (30), the hot water supply device (30) is informed that an abnormality has occurred. A hot water supply system according to claim 1 or 2, further comprising hot water supply device stopping means (S60 to S80) for stopping restart of the hot water supply device (30). Comprising storage means (44) for storing control data of the hot water supply device (30),
Further, the immediately after construction determining means (S40) is configured to measure the hot water supply device (44) when the measurement time when the storage means (44) starts measuring and starting from the recording of the control data is within a predetermined time. 30) is determined immediately after installation, and when the measurement time exceeds a predetermined time, it is determined that it is not immediately after installation of the hot water supply device (30). Hot water supply system as described in one. The said immediately after construction determination means (S40) starts measuring the said measurement time, when the voltage of the power supply which supplies electric power to the said memory | storage means (44) becomes more than predetermined voltage. Hot water system. The immediately after construction determining means (S40) determines that the hot water supply device (30) is immediately after the hot water supply device (30) is installed when the cumulative operating time of the hot water supply device (30) is within a predetermined time, and the cumulative operating time is predetermined. The hot water supply system according to any one of claims 1 to 3, wherein when it is over time, it is determined that it is not immediately after the hot water supply device (30) is installed. Comprising storage means (44) for storing control data of the hot water supply device (30),
Furthermore, the said immediately after construction determination means (S40) starts measuring the said cumulative operation time, when the voltage of the power supply which supplies electric power to the said memory | storage means (44) becomes more than predetermined voltage. 6. The hot water supply system according to 6. The display to restart the hot water supply device (30) notified by the notification means (S50) is a display related to the error display displayed when an abnormality occurs in the hot water supply device (30). The hot water supply system according to any one of claims 1 to 7, wherein

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