JP4502786B2 - Hot water heater - Google Patents

Description

  The present invention relates to a hot water storage type hot water heater configured to supply hot water via a pipe connected to a hot water storage tank that stores hot water heated by a heating source.

In a hot water storage water heater such as a heat pump hot water supply device or an electric water heater disclosed in Patent Document 1, when there is no water in the hot water storage tank such as at the first construction, It is necessary to fill the tank with water beforehand. As a method at this time, a pressure relief valve conventionally attached to the upper part of the hot water tank is manually opened, and water is supplied into the hot water tank by water pressure through a city water pipe (water pipe) connected to the lower part of the hot water tank. Water was filled in the hot water storage tank by discharging air (air) in the hot water storage tank from the pressure relief valve while supplying water.
Japanese Patent Laid-Open No. 2004-20021

  At this time, the method for confirming that the hot water storage tank is filled with water is to confirm that water comes out from the pressure relief valve at the upper part of the hot water storage tank. The valve had to be closed manually. Therefore, since the installer does not know when water comes out from the upper part of the hot water storage tank, it is restrained on the spot until the water filling in the hot water storage tank is completed, and further, it is necessary to close the pressure relief valve thereafter.

  Therefore, the present invention aims to reduce the burden of work and restraint time of the builder by automatically performing the water filling work in the hot water storage tank, and to reduce the construction error due to the skill of the builder. .

  Therefore, according to a first aspect of the present invention, in the hot water storage type hot water heater in which hot water is supplied through a pipe connected to a hot water storage tank for storing hot water heated by a heating source, the hot water storage tank is filled with water. An operating means to be operated, an on-off valve for flowing water from the hot water storage tank into the pipe connected to the hot water storage tank, and detecting that water has flowed into the pipe by opening the on-off valve And the detection sensor detects that a certain amount of water has flowed into the pipe within a certain period of time since the opening and closing valve is controlled to open when the operation means is operated. In this case, a control device for controlling the on-off valve to be closed is provided.

  According to a second aspect of the present invention, there is provided a hot water storage hot water heater configured to supply hot water via a pipe connected to a hot water storage tank for storing hot water heated by a heating source, and is operated when filling the hot water storage tank. Operating means, an on-off valve for flowing water from the hot water storage tank into the pipe connected to the hot water storage tank, and detection for detecting that water has flowed into the pipe by opening the on-off valve A sensor, a display unit for displaying that water filling has been completed, and a control unit that opens the on-off valve when the operation means is operated, and a certain amount of water flows into the pipe within a certain period of time after the opening. When the detection sensor detects that, the on-off valve is controlled to be closed, and a control device is provided for controlling the display unit to indicate that the water filling is completed.

  According to a third aspect of the present invention, there is provided a hot water storage type hot water heater that supplies hot water through a pipe connected to a hot water storage tank for storing hot water heated by a heating source, and is operated when filling the hot water storage tank. Operating means, an on-off valve for flowing water from the hot water storage tank into the pipe connected to the hot water storage tank, and detection for detecting that water has flowed into the pipe by opening the on-off valve A sensor, a display unit for displaying that the water filling is abnormal, and a control unit configured to open the on-off valve when the operation means is operated, and a predetermined amount of water in the pipe within a predetermined time after the opening. When the detection sensor does not detect that the water has flown, a control device is provided that controls to close the on-off valve and displays on the display unit that the water filling is abnormal. Do

  According to the present invention, by automatically performing the water filling operation in the hot water storage tank, it is possible to reduce the burden on the operator's work, the restraint time, and the like, as well as the construction error due to the skill of the installer.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a system diagram showing an overall system of a heat pump type hot water supply apparatus as a hot water storage type hot water heater. In FIG. 1, A is a heat pump unit, B is a tank unit, C is a hot water circulation path for hot water storage, and R is a refrigerant circuit built in the heat pump unit A. In the refrigerant circuit R, a refrigerant such as HFC or CO ₂ can be used, but CO ₂ is used in the present embodiment.

The refrigerant circuit R includes a two-stage compression type compressor 1 capable of adjusting the capacity of suction and compression of CO ₂ refrigerant into high temperature and pressure, and a water refrigerant heat exchanger 2 for hot water storage for exchanging heat between the refrigerant and water. The refrigerant flow path 2A, the air heat exchanger 3 for exchanging heat between the outside air and the refrigerant, and the accumulator 4 are sequentially piped in an annular manner. A blower 5 blows air to the air heat exchanger 3 to perform heat exchange.

  In the hot water circulation path C, the water flow path 2B of the water-refrigerant heat exchanger 2 and the hot water storage tank 8 are annularly connected via a circulation pump 9. Reference numeral 10 denotes a thermistor that detects the temperature of hot water flowing out from the water flow path 2B of the water-refrigerant heat exchanger 2.

  Between the upper part and the middle part of the hot water storage tank 8, a primary flow path 11A of the water heat exchanger 11 and a circulation pump 12 for remedy are connected. A bathtub 14 is connected to the secondary flow path 11 </ b> B of the water heat exchanger 11 via a circulation pump 13. A first mixing valve 15 mixes the hot water in the hot water storage tank 8 with the low-temperature tap water from the water supply pipe 21 through the tap pressure reducing valve 19 and the check valve 20 to obtain hot water of 36 ° C. to 48 ° C. By opening the faucet 17 through the hot water supply pipe 16, hot water can be supplied to the kitchen or the like. Reference numeral 23 </ b> B denotes a flow sensor, which is provided in the hot water supply pipe 16 between the first mixing valve 15 and the faucet 17.

  Reference numeral 18 denotes a second mixing valve, which mixes the tap water from the water supply pipe 21 via the tap pressure reducing valve 19 and the check valve 20 and the hot water from the hot water storage tank 8 to obtain hot water of about 42 ° C. . Then, the hot water produced by the second mixing valve 18 opens the on-off valves 24 and 25 which are on-off valves, thereby opening the secondary flow path 11B of the water heat exchanger 11 and the circulating pump 13 stopped. Accordingly, the hot water filling operation of the bathtub 14 is performed. At this time, the flow rate of the hot water is detected by the flow rate sensor 23A and is controlled by the control device S1 so that a desired amount of hot water filling operation is performed. That is, the control device S1 that has received a detection signal that has detected that a predetermined amount has flowed from the flow sensor 23A controls the on-off valves 24 and 25 to close.

  The hot water storage tank 8 has a capacity of, for example, 370 liters. The hot water storage tank 8 has hot water temperature detection sensors T1, T2, T3, T4, T5, T6 and T7 spaced from the bottom to the top of the hot water tank 8. The control device S1 including a microcomputer mounted on the printed circuit board P1 determines the amount of hot water in the hot water storage tank 8 based on the detected hot water temperature of each detection sensor. At this time, the detection sensor T1 is disposed at a position where the remaining hot water amount is 350 liters, T2 is also 300 liters, T3 is 250 liters, T4 is 200 liters, T5 is 150 liters, T6 is 100 liters, and T7 is 50 liters. . Reference numeral 26 denotes a hot water temperature detection sensor for detecting the hot water temperature near the outlet of the circulation pump 9.

  And the consumer signs a lighting contract according to the time with the electric power company, calculates the amount of water to be heated from the amount of hot water stored at a predetermined time and the time required to boil up the total amount at a predetermined time in the low-night time period when the fee is low, and the heating ends Control is performed by the control device S1 so that the hot water storage operation is started from the time calculated in consideration of the necessary time from the time, and is stopped as soon as the entire amount has been heated up (the temperature detected by the hot water temperature detection sensor 26 is 55 ° C. or higher). At the same time, the control device S1 controls to start the hot water storage operation when the remaining hot water volume is less than 100 liters and to stop the hot water storage operation when it exceeds 150 liters.

  Reference numeral 27 denotes an overflow pipe connected to the upper part of the hot water storage tank 8, and when the temperature of the water becomes high, the volume expands and the water pressure in the water circuit rises. Therefore, this accumulated expansion is used as overflow water outside the apparatus (outside the tank unit B). An overpressure relief valve 28 for discharging is provided.

Note that water pressure reducing valve 19 disposed midway of the water supply pipe 21, the supply water pressure of tap water is set to 170 kPa (about 1.7 kgf / cm ^2), over-pressure relief valve 28 is 190 kPa (about 1 .9 kgf / cm ² ), and when the water supply pressure is sufficient, the internal pressure of the hot water storage tank 8 is usually 170 kPa, and even if the pressure rises, it is always kept at 190 kPa or less.

  It should be noted that by manually opening the overpressure relief valve 28, initial water filling to the hot water storage tank 8 (discharge of air from the overpressure relief valve 28) and drainage from the hot water storage tank 8 (air from the overpressure relief valve 28). Inhalation) is possible.

  The heat pump unit A is provided with a printed circuit board P2 on which a control device S2 made of a microcomputer or the like is mounted, and the tank unit B is provided with a printed circuit board P1 on which a control device S1 made of a microcomputer or the like is mounted. Yes. The printed circuit board P1 has a water filling start switch 31 which is an operation means for starting the filling of water into the display device 30 and the hot water storage tank 8 for displaying the initial filling of water, displaying normal completion, and displaying abnormalities. Are connected to the control device S1. Further, the control device S 1 can be connected to a commercial power source via a power-on switch 33 and a power line 32.

  Further, the printed circuit boards P1 and P2 (control devices S1 and S2) are connected via a power line 35 and a control signal line 36. The control devices S1 and S2 are provided from a bath remote controller (hereinafter referred to as “bath remote controller”) 37 provided in the bathroom, for example, a main remote controller (hereinafter referred to as “main remote controller”) 38 provided in the kitchen. The operation of the compressor 1 and the frequency control, the operation control of the circulation pumps 9, 12, and 13 are performed in accordance with the operation signal and the temperature signal of the hot water temperature detection sensor 26, and the operation will be described below. However, in particular, the control device S1 performs control related to water filling in the hot water storage tank 8.

<Water filling operation>
First, water filling of the hot water storage tank 8 will be described based on the control flowchart of FIG. First, the second mixing valve 18 is set so that the flow rate of hot water flowing through the on-off valves 24 and 25 is as much as possible as the flow rate of hot water flowing from the upper part of the hot water storage tank 8. That is, the second mixing valve 18 is originally warm water produced by mixing hot water in the hot water storage tank 8 with hot water of about 80 ° C. and tap water from the water supply pipe 21 through the tap pressure reducing valve 19 and the check valve 20. However, when filling the hot water tank 8 with water, the path flowing from the upper part of the hot water tank 8 is opened as much as possible. In addition, the opening of the second mixing valve 18 is set so as to close the path of the tap water through the water supply pipe 21 as much as possible.

  Therefore, when the water filling start switch 31 is pressed, the control device S1 controls the display unit 30 so as to display an initial water filling display indicating that the initial water filling has started, and the second mixing valve 18 is located above the hot water tank 8. The opening of the tap water is controlled as much as possible, the opening of the tap water passing through the water supply pipe 21 is closed as much as possible, and the on-off valves 24 and 25 are further opened.

  Thereby, most of the water from the upper part of the hot water storage tank 8 is supplied to the bathtub 14 via the second mixing valve 18 and the secondary flow path 11B of the water heat exchanger 11, and the second mixing valve 18 is also stopped. It is supplied to the bathtub 14 through the circulating pump 13. Therefore, the hot water tank 8 is connected to the bathtub 14 through the second mixing valve 18, the secondary flow path 11 </ b> B of the water heat exchanger 11, or the circulation pump 13.

  This is almost the same as when the cock of the conventional overpressure relief valve 28 is opened to release the pressure of the system including the inside of the hot water storage tank 8 to the atmosphere, and the hot water storage temperature is set by the water pressure set by the water pressure pressure reducing valve 19. The air (air) in the tank 8 is pushed out and discharged into the bathtub 14 through the above-described pipe passage. Then, when the low-temperature tap water from the water supply pipe 21 through the tap pressure reducing valve 19 and the check valve 20 is filled in the hot water storage tank 8, the water is now discharged to the bathtub 14 through the above path.

  At this time, if the flow rate sensor 23A detects that a certain amount of water is flowing before the timer 29 measures a certain time, for example, one hour, after the water filling start switch 31 is pressed, S1 controls to close the on-off valves 24 and 25, assuming that water has been filled up to the upper part of the hot water storage tank 8, and to display on the display unit 30 that the initial water filling has been completed normally. As a result, a series of water filling operations in the hot water storage tank 8 that have conventionally been performed by the operator opening the cock of the overpressure relief valve 28 can be automatically performed without bothering the operator.

  If the flow rate sensor 23A does not detect that a constant amount of water is flowing even when the timer 29 that has started timing by pressing the water filling start switch 31 counts the certain time, the control device S1 Control is performed to close the on-off valves 24 and 25 and control is performed to display on the display unit 30 that the initial water filling is abnormal. In this case, the cause such as forgetting to open the cock arranged in front of the tank unit B (upstream) in the water-filled supply path via the tap water supply pipe 21 can be considered.

The automatic initial water filling control in the hot water storage tank 8 is performed by pressing the water filling start switch 31. However, the present invention is not limited to this, and operation switches provided in the bath remote control 37, the main remote control 38, and the like. But you can. Furthermore, instead of pressing the start switch or the like, it may be performed automatically immediately after the power is turned on . That is, when the control device S1 detects that the power is turned on, the automatic initial water filling control in the hot water storage tank 8 is performed. For example, when it is detected that the power supply switch 33 is closed, such control is performed.

  Further, the display device 30 for displaying during initial filling, normal completion display and abnormal display in the water filling is mounted on the printed circuit board P1 provided in the tank unit B, but not limited thereto, the bath remote control 37, the main remote control 38, etc. May be provided.

  As another method for detecting an abnormality in water filling, there is an initial running water check method as shown in the control flowchart of FIG. That is, since the city water is originally stopped, tap water is not supplied to the hot water storage tank 8 via the water supply pipe 21 no matter how much time passes. If it is possible to check whether there is water supply from city water, it is possible to detect an abnormality without waiting for the time to detect an abnormality in the initial water filling, and it is also possible to identify the cause of the abnormality. For example, simultaneously with the start of initial water filling by pressing the water filling start switch 31, the second mixing valve 18 is set so that a lot of low-temperature tap water flows from the water supply pipe 21 through the tap pressure reducing valve 19 and the check valve 20. Then, the control device S1 controls to open the on-off valves 24 and 25.

  At this time, if water is supplied from the city water, the tap water is supplied from the pressure reducing valve 19 → the check valve 20 → the second mixing valve 18 → the open / close valves 24 and 25 → the secondary flow path 11B of the water heat exchanger 11. → Supplied to the bathtub 14 and the flow rate of water is detected by the flow rate sensor 23A. That is, after the water filling start switch 31 is pressed and before the timer 29A counts a certain time, when the flow sensor 23A detects that a certain amount of water is flowing, the control device S1 performs the hot water storage tank 8. Control is performed to close the on-off valves 24 and 25, assuming that water has been filled up to the top, and to display on the display unit 30 that the initial running water check is normal.

  If the timer 29A, which has started measuring time by the pressing operation of the water filling start switch 31, counts the fixed time, but the flow rate sensor 23A does not detect that a constant amount of water is flowing, the control device S1 Control is performed so that the on-off valves 24 and 25 are closed, and control is performed to display on the display unit 30 that the initial running water check is abnormal.

  Note that the heat source is the heat pump unit A and is separate from the tank unit B in which the hot water storage tank 8 is built, and piping for connecting the tank unit B and the heat pump unit A is necessary. In order to release the air in the pipe, even if control is performed to seal the hot water circulation path C by intermittently or continuously operating the circulation pump 9 during the automatic initial water filling control in the hot water storage tank 8 as described above. Good. Further, the connection circuit between the upper part and the intermediate part of the hot water storage tank 8 through which the primary flow path 11A of the water heat exchanger 11 in the tank unit B and the circulation pump 12 for replenishment are interposed is sealed with water. Similarly, the circulation pump 9 may be operated intermittently or continuously during the automatic initial water filling control. Thereby, the air in piping for connecting the tank unit B and the heat pump unit A can be discharge | released.

<Hot water storage operation>
Next, hot water storage operation will be described. In late night hours when the price is low, calculate the amount of water to be heated from the amount of hot water stored at a predetermined time, and the time required to boil up the entire amount, and hot water storage operation starts from the time calculated in reverse from the boiling end time taking into account the required time. Be started. In other time zones, when the remaining hot water volume is less than 100 liters, that is, when the detection sensor T6 detects that the hot water temperature is less than 55 ° C., the hot water storage operation is started.

  That is, hot water is stored in the hot water storage tank 8 based on the detection output from the detection sensor, and the control device S1 operates the circulation pump 9. In the hot water circulation path C, the hot water storage tank 8 → the circulation pump 9 → water refrigerant heat. Hot water for hot water supply flows in the order of the water flow path 2 </ b> B of the exchanger 2 → the hot water storage tank 8, and is stored in the hot water storage tank 8.

  In the heat pump unit A, the compressor 1 is operated by the control device S1, and in the refrigerant circuit R, the compressor 1 → the refrigerant flow path 2A of the water / refrigerant heat exchanger 2 → the air heat exchanger 3 → the accumulator 4 → the compressor 1 in this order. The refrigerant flows.

<Water supply operation, hot water filling operation and memorial operation>
The hot water stored in the hot water storage tank 8 is mixed with the low-temperature tap water from the water supply pipe 21 via the tap pressure reducing valve 19 and the check valve 20 and the first mixing valve 15, and hot water of 36 ° C. to 48 ° C. Then, hot water is supplied to the kitchen or the like by opening the faucet 17 through the hot water supply pipe 16. When this hot water supply is performed, water is supplied from the water supply pipe 21 to the lower part of the hot water storage tank 8.

  Moreover, the hot water from the hot water storage tank 8 and the tap water from the water supply pipe 21 via the tap pressure reducing valve 19 and the check valve 20 are mixed in the second mixing valve 18 so that the hot water having a temperature of about 42 ° C. When the on-off valves 24 and 25 are opened, the hot water filling operation of the bathtub 14 is performed via the secondary circulation path 11B of the water heat exchanger 11 through the circulation pump 13 that is stopped or without the circulation pump 13. Will be made. That is, the flow rate sensor 23A detects the flow rate of the hot water at this time, and the control device S1 that has received the detection signal that the predetermined amount has flowed from the flow rate sensor 23A closes the on-off valves 24 and 25. To control.

  In addition, the control device S1 operates the circulation pumps 12 and 13, thereby exchanging heat between the hot water in the hot water storage tank 8 and the hot water in the bathtub 14 with the water heat exchanger 11 to replenish the hot water in the bathtub 14. You can also.

  When the boiling of the whole amount is completed in the midnight time zone (when the hot water temperature detection sensor 26 detects 55 ° C. or more), and when the remaining hot water amount becomes 150 liters or more in other time zones, that is, the detection sensor When T5 detects 55 ° C. or higher, the control devices S1 and S2 control the hot water storage operation to be stopped.

  The automatic initial water filling control in the hot water storage tank 8 uses the second mixing valve 18, the flow rate sensor 23 </ b> A, and the opening / closing valves 24 and 25 that are originally provided in the piping path for filling the bathtub 14 with hot water. is there. Next, in the case of a dedicated hot water supply machine that does not have a function of filling the bathtub 14 with hot water, as shown in FIG. 5, hot water supply is performed on the hot water supply piping system, that is, between the first mixing valve 15 and the faucet 17. A pipe 40 branched from the pipe 16 is provided, and an opening / closing valve 41 dedicated to the initial water filling control in the hot water storage tank 8 is provided in the middle of the pipe 40 so as to operate in the same manner as the opening / closing valves 24 and 25. A flow sensor 23B may be provided.

  As a result, when the water filling start switch 31 is pressed, the control device S1 opens as much as possible the path through which the first mixing valve 15 flows from the upper part of the hot water storage tank 8 and closes the tap water path through the water supply pipe 21 as much as possible. Control is performed so that the opening degree is set as described above, and control is performed so that the on-off valve 41 is opened. Therefore, almost the water from the upper part of the hot water storage tank 8 is discharged out of the tank unit B through the second mixing valve 18 and the on-off valve 41 and passed through.

  This is almost the same as when the cock of the conventional overpressure relief valve 28 is opened and the pressure in the hot water storage tank 8 is released to the atmosphere, and the water pressure in the hot water storage tank 8 is set by the water pressure set by the water pressure reducing valve 19. Air (air) is pushed out and discharged to the outside of the tank unit B through the above-described pipe passage. Then, when the low-temperature tap water from the water supply pipe 21 through the water pressure reducing valve 19 and the check valve 20 is filled into the hot water storage tank 8, the water is now discharged out of the tank unit B through the above-described pipe passage. .

  At this time, if the flow sensor 23B detects that a certain amount of water is flowing before the timer 29 measures a certain time, for example, one hour, after the pressing operation of the water filling start switch 31, the control device S1 controls to close the on-off valve 41, assuming that water has been filled up to the upper part of the hot water storage tank 8, and to display on the display unit 30 that the initial water filling has been completed normally.

  Next, even if there is a function of filling the bathtub 14 with hot water, instead of using the piping path to the bathtub 14, as shown in FIG. 5, the pipe 50 is connected between the flow sensor 23 </ b> A and the on-off valve 24. Connected, an on-off valve 51 dedicated to initial water filling control in the hot water storage tank 8 is provided in the middle of the pipe 50 to perform the same operation as the on-off valves 24 and 25.

  Accordingly, when the water filling start switch 31 is pressed, the control device S1 opens the path through which the second mixing valve 18 flows from the upper part of the hot water storage tank 8 as much as possible and closes the path of tap water through the water supply pipe 21 as much as possible. Control is performed so that the opening degree is set as described above, and control is performed so that the on-off valve 51 is further opened. Therefore, almost the water from the upper part of the hot water storage tank 8 is discharged out of the tank unit B through the second mixing valve 18 and the on-off valve 51 and is piped.

  This is almost the same as when the cock of the conventional overpressure relief valve 28 is opened and the pressure in the hot water storage tank 8 is released to the atmosphere, and the water pressure in the hot water storage tank 8 is set by the water pressure set by the water pressure reducing valve 19. Air (air) is pushed out and discharged to the outside of the tank unit B through the above-described pipe passage. Then, when the low-temperature tap water from the water supply pipe 21 through the water pressure reducing valve 19 and the check valve 20 is filled into the hot water storage tank 8, the water is now discharged out of the tank unit B through the above-described pipe passage. .

  At this time, if the flow rate sensor 23A detects that a certain amount of water is flowing before the timer 29 measures a certain time, for example, one hour, after the water filling start switch 31 is pressed, S1 controls to close the on-off valve 51, assuming that water has been filled up to the upper part of the hot water storage tank 8, and to display on the display unit 30 that the initial water filling has been completed normally.

  Further, as shown in FIG. 5, a pipe 60 branched from the overflow pipe 27 is provided between the upper part of the hot water storage tank 8 and the overpressure pressure relief valve 28, and the initial water filling control in the hot water storage tank 8 is dedicated in the middle of the pipe 60. The on-off valve 61 may be provided to operate in the same manner as the on-off valves 24 and 25, and the flow rate sensor 23C may be provided instead of the flow rate sensors 23A and 23B.

  Thus, when the water filling start switch 31 is pressed, the control device S1 controls to open the on-off valve 61. Accordingly, the water from the upper part of the hot water storage tank 8 is discharged out of the tank unit B through the on-off valve 61 and is piped.

  This is almost the same as when the cock of the conventional overpressure relief valve 28 is opened and the pressure in the hot water storage tank 8 is released to the atmosphere, and the water pressure in the hot water storage tank 8 is set by the water pressure set by the water pressure reducing valve 19. Air (air) is pushed out and discharged to the outside of the tank unit B through the above-described pipe passage. Then, when the low-temperature tap water from the water supply pipe 21 through the water pressure reducing valve 19 and the check valve 20 is filled into the hot water storage tank 8, the water is now discharged out of the tank unit B through the above-described pipe passage. .

  At this time, after the pressing operation of the water filling start switch 31 and before the timer 29 measures a certain time, for example, one hour, when the flow sensor 23C detects that a certain amount of water is flowing, the control device S1 controls to close the on-off valve 61 on the assumption that water has been filled up to the upper part of the hot water storage tank 8, and controls to display on the display unit 30 that the initial water filling has been completed normally.

  In the above description of the plurality of embodiments, a flow sensor is taken as an example of means for detecting the flow of water. However, a flow detection switch can be used as long as it detects the flow of water. Alternatively, for example, a temperature detection thermistor may be used to detect the temperature difference between when water is flowing and when water is not flowing. In addition, more reliable water flow detection may be performed by a combination of a method of detecting water with a thermistor and a change in the value of a flow sensor or a water flow detection switch.

  Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the various alternatives and modifications described above are within the scope of the present invention. Or a modification is included.

It is a whole system diagram of a heat pump type hot water supply apparatus. It is a control block diagram. It is a figure which shows a control flowchart. It is a figure which shows the control flowchart which concerns on other embodiment. It is a whole system diagram of the heat pump type hot-water supply apparatus which shows other embodiment.

Explanation of symbols

8 Hot water storage tank 14 Bath 18 Second mixing valve 21 Water supply pipe 23A, B, C Flow rate sensor 24, 25 On-off valve 29 Timer 31 Water filling start switch A Heat pump unit B Tank unit C Hot water circulation path R Refrigerant circuit S1 Controller

Claims (3)

In a hot water storage type hot water heater that supplies hot water via a pipe connected to a hot water storage tank that stores hot water heated by a heating source,
Operating means operated when filling the hot water storage tank;
A mixing valve for mixing and flowing water from the hot water storage tank and tap water from the water supply pipe;
An on-off valve for flowing water through the mixing valve into the pipe connected to the hot water storage tank ;
A detection sensor for detecting that water has flowed into the pipe by opening the on-off valve;
When the operation means is operated, the on-off valve is opened, and the mixing valve controls the water mixed with the water from the hot water storage tank and the tap water from the water supply pipe to flow into the pipe. A hot water storage system comprising a control device that controls to close the on-off valve when the detection sensor detects that a certain amount of water has flowed into the pipe within a certain time after opening. Water heater. In a hot water storage type hot water heater that supplies hot water via a pipe connected to a hot water storage tank that stores hot water heated by a heating source,
Operating means operated when filling the hot water storage tank;
A mixing valve for mixing and flowing water from the hot water storage tank and tap water from the water supply pipe;
An opening and closing valve for flowing water through the mixing valve to the hot water storage tank connected to said inside pipe,
A detection sensor for detecting that water has flowed into the pipe by opening the on-off valve;
A display for displaying that the water filling is normal;
When the operation means is operated, the on-off valve is opened, and the mixing valve controls the water mixed with the water from the hot water storage tank and the tap water from the water supply pipe to flow into the pipe . When the detection sensor detects that a certain amount of water has flowed into the pipe within a certain time after the opening of the on-off valve, the on-off valve is controlled to be closed and the display section is normally filled with water. A hot water storage type hot water heater provided with a control device for controlling to display the fact. In a hot water storage type hot water heater that supplies hot water via a pipe connected to a hot water storage tank that stores hot water heated by a heating source,
Operating means operated when filling the hot water storage tank;
A mixing valve for mixing and flowing water from the hot water storage tank and tap water from the water supply pipe;
An on-off valve for flowing water through the mixing valve into the pipe connected to the hot water storage tank ;
A detection sensor for detecting that water has flowed into the pipe by opening the on-off valve;
A display for displaying that the water filling is normal;
When the operation means is operated, the on-off valve is opened, and the mixing valve controls the water mixed with the water from the hot water storage tank and the tap water from the water supply pipe to flow into the pipe . When the detection sensor does not detect that a certain amount of water has flowed into the pipe within a certain time after the opening of the on-off valve, the on-off valve is controlled to be closed and the display section is not properly filled with water. A hot water storage type hot water heater provided with a control device for controlling to display the fact.

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