JP5717982B2 - Solar thermal collector and heat medium tension control method - Google Patents

Description

The present invention relates to, for example, a solar heat collecting apparatus and a heat medium tension control method that collect solar heat to heat a heat medium and use the heat of the heat medium for hot water supply, heating, bath water replenishment, and the like.

  In addition to combustion heat such as fuel gas and kerosene, solar heat is used as a heat source in heat source devices used for various types of heating such as indoor heating. Use of solar heat for the heat source device uses natural energy, so that the heat energy can be used efficiently and carbon dioxide is not discharged. Such a heat source device is known as a high-temperature water distribution type hot-water heater.

  Regarding this type of heat source device, first and second heat exchangers are installed in a hot water storage tank to which clean water is supplied as a solar hot water heater / heater, and heat collected by the solar heat collector in the first heat exchanger It is known that heat is exchanged by circulating a medium, and heat of hot water heated by a boiler is exchanged in a second heat exchanger (Patent Document 1). In this solar water heater / heater, solar heat is used to heat the hot water in the hot water tank, and the heated hot water is supplied as hot water. Moreover, the hot water heated by the boiler is used for heating and bathing.

In the heat source device using combustion exhaust as a heat source, the heat of the heat medium is exchanged with water or bathtub water by the first heat exchange means, and the latent heat of the combustion exhaust is supplied to water supply or bathtub water with the second heat exchange means. A heat source device for heat exchange and a heat exchange device are known (Patent Document 2).

JP 59-134432 A JP 2007-315700 A

  By the way, in a solar heat collecting apparatus that is a system that uses solar heat as a heat source, a heat collector that collects solar heat using a heat medium is usually installed at a construction height of about 10 [m]. For this reason, in the heat collecting pump incorporated in the heat collecting circuit, air cannot be reliably discharged from the heat collecting circuit due to insufficient lift force. If the rotational speed of the heat collecting pump is increased, the residual air in the heat collecting circuit can be reduced, but the residual air cannot be eliminated at all, and the power consumption of the heat collecting pump is increased.

  Residual air in the heat collection circuit is exhausted from the heat collection circuit by thermal expansion for several days by repeating the heat collection operation, but heat collection operation using a heat medium containing residual air is heat collection using only the heat medium. There is an inconvenience that the heat collection efficiency is poor compared to the operation.

  If it takes time to supply the heat medium to the heat collection circuit at the time of construction, even if the residual air can be discharged, the time for heat medium tensioning must be added to the construction time, which reduces the construction efficiency. This will increase the construction cost.

Therefore, in view of the above-described problems, an object of the present invention is to expel air from a circulation circuit that circulates a heat medium so as to speed up the heating medium in the circulation circuit.

In order to solve the above problems, a solar heat collecting apparatus of the present invention is a solar heat collecting apparatus that collects solar heat and exchanges heat with a heat medium, a circulation circuit that circulates the heat medium, and a storage that stores the heat medium. When the pressure of the tank and the circulation circuit rises, the heat medium flows out from the circulation circuit to the storage tank, and when the heat medium runs short in the circulation circuit, the heat medium from the storage tank a pressure tank for drawing a water level sensor for detecting the heating medium water level of the storage tank the reservoir tank is installed in, heated collecting solar heat and heat collection means for heat exchange in the heating medium, the circulation circuit When the heat medium is supplied to the pressure tank from the outside and the pump is started to operate, the pump is operated at a first high-speed rotation, and the pump is circulated every predetermined time. The first of High speed and the operation at low speed are alternately repeated, the heating medium water level of the water level sensor is the reservoir tank is the pump in the second high-speed rotation upon detecting that it has reached a predetermined water level The operation is switched to the operation, and the operation of the pump is terminated after the operation at the second high-speed rotation, whereby the heat medium supplied to the pressure tank from the outside is transferred from the pressure tank to the heat collecting means and the circulation circuit. And a controller that sends out the heat collecting means and fills the circulating medium with the heat medium.

  In such a configuration, the heat medium moves through the circulation circuit in accordance with repeated strong and weak operation of the pump, and in accordance with this movement, the discharge of air from the circulation circuit is promoted, and the heat medium can be filled without residual air.

In order to solve the above-mentioned problem, the heating medium tension control method of the solar heat collecting apparatus of the present invention includes a circulation circuit for circulating the heating medium, a storage tank for storing the heating medium, and a pressure of the circulation circuit rising. causes to flow the heat medium to said storage tank from the circulation circuit, wherein the pressure tank to suck the heating medium from the reservoir tank, the reservoir is installed in the reservoir tank when the heating medium in the circulation circuit is insufficient A water level sensor for detecting the water level in the tank, heat collecting means for collecting solar heat and exchanging heat with the heat medium, a pump for circulating the heat medium in the circulation circuit, and a control for controlling the pump A heat medium tension control method for a solar heat collector that collects solar heat and exchanges heat with a heat medium, the step of supplying the heat medium from the outside to the pressure tank, and the operation of the pump is started When To operate the pump at high speed of 1, are alternately repeated operation at high speed and low speed rotation of the first of said pump at predetermined time intervals, the heating medium water level of the water level sensor is the reservoir tank is predetermined switching of the pump upon detecting the arrival at the water level for operation in the second high-speed rotation, by completing the operation the pump after operation at a high speed rotation of the second, the pressure tank from the outside And supplying the heat medium supplied to the heat collecting means and the circulation circuit from the pressure tank to fill the heat medium in the heat collection means and the circulation circuit.

Also with such a configuration, since the heat medium moves through the circulation circuit in accordance with repeated strong and weak operation of the pump, the discharge of air from the circulation circuit is promoted, and the heat medium can be filled without residual air.

  According to the present invention described above, any of the following effects can be obtained.

  (1) It is possible to accelerate air exhaust from the circulation circuit and speed up the heating medium.

  (2) Heat medium can be laid without residual air, and the efficiency of heat exchange with solar heat medium can be improved.

(3) It is possible to reduce the driving time of the pump required for heating medium tension and to suppress power consumption.

Other objects, features, and advantages of the present invention will become clearer with reference to the accompanying drawings and each embodiment.

It is a figure which shows an example of the heating / hot water supply / remembrance device which concerns on embodiment. It is a figure which shows an example of a hot water storage tank and a heat collecting circuit. It is a figure which shows an example of the structure of a pressure cap, and its operation | movement. It is a figure which shows an example of the heat medium supply to a pressure tank. It is a figure which shows an example of the heat medium tension of a heat collecting circuit. It is a figure which shows an example of a control apparatus. It is a flowchart which shows an example of the process sequence of heat medium tensioning operation. It is a flowchart which shows an example of the process sequence of heat medium tensioning operation. It is a figure which shows an example of a pump rotation speed table.

  Reference is made to FIG. 1 for an embodiment of the present invention. FIG. 1 shows an example of a heating / hot water supply / remembrance device.

  This heating / hot water supply / remembrance device 2 is an example of the solar heat collecting device and the heat medium tension control method of the present invention, and promotes air discharge in the pipe line to the heat collecting circuit 6 for circulating the heat medium, This is a configuration for speeding up the heat medium tension.

  As shown in FIG. 1, the heating / hot water supply / remembrance device 2 includes a hot water storage tank 4, a solar heat collecting circuit 6, and a circulation path 8 for circulating the heat medium HM1.

  The hot water storage tank 4 is an example of a storage unit that stores the heat medium HM1 as a heat medium, and is an example of a heat storage unit that stores heat using the heat medium HM1. The hot water storage tank 4 is opened to the atmosphere by a ventilation pipe 11.

  The heat collection circuit 6 is a heat collection unit that collects heat by exchanging solar heat, which is a heat source, with a heat medium, and is an example of a circulation circuit that circulates the heat medium HM2. The heat collection circuit 6 exchanges solar heat with the heat medium HM2. . The heat collection circuit 6 includes a heat collection panel 10, a solar heat exchanger 12 as a heat exchange unit, a heat collection pump 14, a heat collection switching valve 16, a bypass 18, a pressure tank 21, and a reserve tank 23. ing.

  The heat collection panel 10 is an example of a heat collection means (heat exchange means) that collects solar heat and exchanges the heat with the heat medium HM2. A heat source using combustion heat or exhaust heat may be used together with the heat collection panel 10. The solar heat exchanger 12 is an example of means for exchanging heat from the heat medium HM2 to the heat medium HM1. The heat collection pump 14 is an example of a hot water pumping unit used when heat exchange of solar heat to the heat medium HM2 or heat exchange of the heat medium HM2 to the heat medium HM1. The bypass 18 is a side path of the solar heat exchanger 12 that branches the heat collecting circuit 6 through the heat collecting switching valve 16, and circulates the heat medium HM2 when the temperature of the heat medium HM2 is low.

  The pressure tank 21 is an example of a storage tank that stores the heat medium HM2. When the heat medium HM2 flowing through the heat collection circuit 6 rises, the pressure tank 21 causes the heat medium HM2 to flow out from the heat collection circuit 6 to the reserve tank 23, and When the heat medium HM2 is insufficient in the heat collecting circuit 6, the heat medium HM2 is sucked from the reserve tank 23. For this reason, a connecting pipe 27 is connected to the pressure cap 25, and the connecting pipe 27 is inserted into the reserve tank 23 and submerged in the heat medium HM <b> 2 in the reserve tank 23.

  The reserve tank 23 is an example of a storage tank that stores the heat medium HM2, and stores the heat medium HM2 that flows out of the pressure tank 21 or is supplied to the pressure tank 21. The reserve tank 23 is provided with a water level sensor 29 for detecting the water level of the heating medium HM2. In addition, an overflow pipe 31 is connected to the reserve tank 23, and the heat medium HM2 exceeding the upper limit level of the reserve tank 23 is discharged from the overflow pipe 31.

  A temperature sensor 20 is installed on the entrance side of the heat collection panel 10, and a temperature sensor 22 is installed on the exit side of the heat collection panel 10. The temperature T 1 detected by the temperature sensor 20 is used for heat exchange of the heat medium HM 2 by the solar heat exchanger 12. The previous temperature and the detected temperature T2 of the temperature sensor 22 are the temperatures of the heat medium HM2 after the heat exchange, and these detected temperatures T1 and T2 are the opening and closing of the bypass 18 and the heat collecting pump 14 by switching the heat collecting switching valve 16. Used for control.

  The circulation path 8 includes a branch path 24, a circulation pump 26, a primary heat exchanger 28 for heating the heat medium HM1, and a secondary heat exchanger 30. The circulation path 8 is connected to a low temperature heating circuit 32, a high temperature heating circuit 34, a hot water supply circuit 36, and a memory circuit 38 as means for using the heat of the heat medium HM1.

  The diversion channel 24 is a pipe line connected to the circulation path 8 between the entry side and the exit side of the hot water storage tank 4, and divides the heat medium HM 1 to join the heat medium HM 1 on the exit side of the hot water storage tank 4. It is an example of the means to make.

  A hot water storage tank switching valve 40 is installed at the branch point between the circulation path 8 and the branch flow path 24, and the hot water storage tank switching valve 40 distributes the hot water flow flowing to the hot water storage tank 4 side and the hot water flow flowing to the branch flow path 24. It is an example of the flow volume distribution means to do. A temperature sensor 42 is installed in the circulation path 8 on the inlet side of the hot water tank switching valve 40, an on-off valve 43 is installed in the circulation path 8 on the inlet side of the hot water tank 4, and a temperature sensor 44 is installed in the vicinity of the outlet side of the hot water tank 4. Yes. The on-off valve 43 is means for opening and closing the circulation path 8 on the inlet side of the hot water storage tank 4. The detected temperatures T3 and T4 of the temperature sensors 42 and 44 are used for setting and controlling the distribution ratio between the hot water flow rate flowing to the hot water storage tank 4 side and the hot water flow rate flowing to the branch channel 24. The temperature sensor 44 is a first temperature sensor that detects the temperature of the heating medium HM1 that is a heating medium, and the temperature sensor 42 is a second temperature sensor that detects the temperature of the heating medium HM1 that returns to the circulation path 8 from the load side. A gas-liquid separator 45 is installed at the junction of the circulation path 8 on the outlet side of the hot water storage tank 4 and the branch path 24. The gas-liquid separator 45 is a means for separating air from the heat medium HM1.

  The circulation pump 26 is an example of a pressure feeding unit for the heat medium HM1, and is driven when the heat medium HM1 is used or heated by the primary and secondary heat exchangers 28 and 30, and the heat medium HM1 is supplied to the circulation path 8. Circulate.

  The primary heat exchanger 28 is a first heat exchanging means for exchanging mainly sensible heat from the combustion exhaust of the burner 46 installed as an example of the fuel gas combusting means to the heat medium HM1. The secondary heat exchanger 30 is a second heat exchange means for exchanging mainly latent heat from the combustion exhaust of the burner 46 to the heat medium HM1, and is used for preheating the heat medium HM1. A temperature sensor 48 is installed in the outlet side circulation path 8 of the primary heat exchanger 28, and a temperature sensor 50 is installed in the outlet side circulation path 8 of the secondary heat exchanger 30, and these detected temperatures T 5 and T 6 are detected by the burner 46. Used for combustion control.

  The low-temperature heating circuit 32 is a pipe that branches from the outlet side of the secondary heat exchanger 30 and the inlet side of the hot water tank switching valve 40 in the circulation path 8 and circulates the low-temperature heating medium HM1 in the low-temperature heater 52. . The low-temperature heater 52 is an example of the first heat radiation load or heat radiation means of the heat medium HM1, and is, for example, a floor heater.

  The high temperature heating circuit 34 is a pipe that branches from the outlet side of the primary heat exchanger 28 of the circulation path 8 and the inlet side of the hot water storage tank switching valve 40 and circulates the high temperature heating medium HM1 in the high temperature heater 54. The high temperature heater 54 is an example of a second heat radiation load or heat radiation means of the heat medium HM1, and is, for example, a hot air heater.

  The hot water supply circuit 36 is a conduit that heats the water supply W with the heat medium HM1 and discharges the hot water as the hot water HW. In this embodiment, the hot water supply heat exchanger 56, the secondary heat exchanger 58, and the bypass 60 With.

  The hot water supply heat exchanger 56 is an example of a hot water supply heat exchanging means for exchanging heat of the heat medium HM1 to the supply water W. For the hot water supply heat exchanger 56, for example, a plate heat exchanger is used. In this hot water supply heat exchanger 56, a water pressure acts on the water supply side. This hot water supply heat exchanger 56 is installed in a circulation path 8A branched to the circulation path 8 via a high-temperature distribution valve 62, and the heat medium HM1 circulates through the circulation path 8A. When water leakage due to perforation occurs in the circulation path 8A in the hot water supply heat exchanger 56, the hot water pressure overcomes the pressure of the heat medium HM1, the hot water enters the heat medium HM1, and the hot water storage tank 4 The water level will be raised.

  The secondary heat exchanger 58 is means for exchanging mainly latent heat from the combustion exhaust of the burner 46 described above to the feed water W, and efficiently heats the latent heat to the feed water W if the feed water W is clean water at room temperature. Can be exchanged. The preheated water supply W is heat-exchanged by the hot water supply heat exchanger 56 with the heat of the heat medium HM1 to obtain high-temperature hot water HW. The bypass 60 is a means for mixing the hot water W with the hot water HW, and can warm the hot water HW at an appropriate temperature using a mixing valve (not shown). A temperature sensor 64 is installed on the inlet side of the hot water W of the hot water supply circuit 36, and a temperature sensor 66 is installed on the outlet side of the hot water HW. These detected temperatures T7, T8, etc. are used to control the combustion of the burner 46 as control of the outlet temperature. It is used to control the mixing ratio with the water supply W to the bypass 60 side.

  The memorial circuit 38 is an example of means for exchanging heat of the heat medium HM1 to the bathtub water BW in the bathtub 68 and raising the temperature of the bathtub water BW to a temperature suitable for bathing. The remedy circuit 38 includes a remedy heat exchanger 70 and a remedy pump 72. The remedy heat exchanger 70 is an example of heat exchange means for exchanging heat of the heat medium HM1 to the bath water BW, and is installed in the circulation path 8B branched to the circulation path 8 via the high-temperature distribution valve 62. Then, the heating medium HM1 circulates through the circulation path 8B. The remedy pump 72 is a means for circulating the bath water BW from the tub 68 through the remedy heat exchanger 70 to the tub 68 during the remedy. A temperature sensor 74 is installed on the exit side of the bathtub 68 of the tracking circuit 38, and the detected temperature T9 is used for tracking control.

  A pouring circuit 76 is connected between the chasing circuit 38 and the hot water supply circuit 36, and the pouring circuit 76 connects the hot water supplying circuit 36 and the chasing circuit 38 via a pouring electromagnetic valve 78. Yes. The pouring solenoid valve 78 is an example of means for insulating the water W side and the bath water BW.

  A temperature sensor 80 is installed in the installation area of the circulation path 8, and the outside air temperature T10 is detected by the temperature sensor 80.

  These detected temperatures T1 to T10 are taken into the control device 82 (FIG. 6) as control information, and the drive of the heat collecting pump 14, the circulation pump 26 and the regenerative pump 72 and the combustion of the burner 46 are controlled by the drive output of the control device 82 Is done.

  Next, the hot water storage tank 4, the water level confirmation tank 5, and the heat collecting circuit 6 will be described with reference to FIG. FIG. 2 shows details of the hot water storage tank, the water level confirmation tank, and the heat collection circuit. 2, the same parts as those in FIG. 1 are denoted by the same reference numerals.

  On the outlet side of the hot water storage tank 4, a temperature sensor 44 is installed in the vicinity of the circulation path 8, and the temperature of the outlet-side heat medium HM <b> 1 is detected by the temperature sensor 44. In the case of this embodiment, a temperature sensor 49 is also installed in the vicinity of the solar heat exchanger 12. The temperature sensor 49 detects the heat exchange temperature.

  As described above, the heat collection circuit 6 includes the pressure tank 21 and the reserve tank 23. The pressure tank 21 is a pressure buffer for the heat medium HM2 flowing through the heat collecting circuit 6, and a connecting pipe 27 attached to a pressure cap 25 that closes the pressure tank 21 is inserted into the reserve tank 23. Through this connection pipe 27, the heat medium HM 2 can escape from the heat collecting circuit 6 to the reserve tank 23, and the heat medium HM 2 in the reserve tank 23 can be drawn into the pressure tank 21 and replenished to the heat collecting circuit 6.

  Next, the pressure cap 25 and its operation will be described with reference to FIG. FIG. 3A shows an example of the pressure cap during operation of the main pressure valve, and FIG. 3B shows an example of the pressure cap during operation of the negative pressure valve. 3, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals.

  The pressure cap 25 is attached to the upper part of the pressure tank 21 and includes a main pressure valve 252 and a negative pressure valve 254.

  The opening of the pressure tank 21 is provided with a valve seat portion 258 having a diameter larger than the neck portion 256 having a small diameter. The main pressure valve 252 is attached to the lid portion 260 so as to be openable and closable with respect to the valve seat portion 258. A spring 262 is installed between the lid 260 and the main pressure valve 252 in a compressed state. The restoring force of the spring 262 maintains the main pressure valve 252 in pressure contact with the valve seat 258.

  Therefore, in the state shown in FIG. 3A (main pressure valve operating state), when the increase in the internal pressure of the pressure tank 21 overcomes the restoring force of the spring 262, the spring 262 is compressed, the main pressure valve 252 is opened, and the internal pressure is restored. It remains open while you overcome the power. In this state, the heat medium HM2 in the pressure tank 21 flows out from the pressure tank 21 through the connecting pipe 27 to the reserve tank 23. Such outflow occurs when the heat medium HM2 is expanded or at a high temperature.

  Further, a negative pressure valve 254 is attached to the center of the main pressure valve 252 so as to be opened and closed by a valve shaft 264 penetrating the main pressure valve 252, and is compressed between the flange portion 266 of the valve shaft 264 and the main pressure valve 252. A spring 268 is installed. The restoring force of the spring 268 maintains the pressure contact state with the negative pressure valve 254 using the main pressure valve 252 as a valve seat portion.

  Therefore, in the state shown in FIG. 3B (negative pressure valve operating state), since the negative pressure is acting on the pressure tank 21, the main pressure valve 252 is closed, but the negative pressure valve 254 is subjected to the restoring force of the spring 268. It is in an open state due to overcoming negative pressure. In this state, the heating medium HM2 flows from the reserve tank 23 through the connecting pipe 27 into the pressure tank 21. Such an inflow occurs when the heat medium HM2 contracts and at a low temperature.

  Next, the heating medium supply to the pressure tank 21 will be described with reference to FIG. FIG. 4 shows the supply of the heat medium in the pressure tank, A shows the opening of the pressure tank, and B shows the supply of the heat medium in the pressure tank.

  The pressure cap 21 can be removed from the pressure tank 21. When the pressure cap 25 is removed, the pressure tank 21 is opened as shown in FIG.

  Therefore, as shown in FIG. 4B, a cap 272 is attached to the opening 270 of the pressure tank 21 instead of the pressure cap 25, and the pipe 35 is connected to the connecting portion 273 in the cap 272. The cap 272 is an example of a support means for the pipe 35 for supplying the heat medium HM2 from the heat medium pack 33. The cap 272 is formed with a through hole 274 through which the heat medium HM2 passes through the connecting portion 273, so that the heat medium HM2 is injected into the pressure tank 21 from the through hole 274.

  An O-ring 276 is attached to the cap 272, and the cap 272 and the opening 270 of the pressure tank 21 are sealed by the O-ring 276. The pressure tank 21 is formed with a connecting portion 278 for connecting the connecting pipe 27 described above. The connecting portion 278 is connected to the connecting pipe 27, and the pressure tank 21 is moved to the reserve tank 23 side through the connecting pipe 27. It is open.

  With such a configuration, the heat medium HM2 supplied from the heat medium pack 33 is supplied from the cap 272 to the pressure tank 21 through the pipe 35, and the heat medium HM2 overflowing the pressure tank 21 flows to the reserve tank 23 side. The heating medium HM2 can also be supplied to the reserve tank 23.

  Next, FIG. 5 is referred to regarding the heat medium tension to the heat collecting circuit 6. FIG. 5 shows an example of a heat collection circuit, a pressure tank, and a reserve tank when supplying the heat medium. 5, the same parts as those in FIGS. 1, 2, 3, and 4 are denoted by the same reference numerals.

  The pressure tank 21 is installed in the heat collecting circuit 6 which is a closed circuit, and can be opened and closed by a pressure cap 25. A heat medium such as an antifreeze can be used as the heat medium HM2 circulated in the heat collecting circuit 6. In FIG. 5, the pressure cap 25 is removed and the above-described cap 272 is attached because the heating medium is supplied.

  Therefore, the heat medium pack 33 is connected to the cap 272 by the pipe 35, and the water W in the heat medium pack 33 can be poured into the heat collecting circuit 6 as the heat medium HM2. The aforementioned connection pipe 27 is connected to the cap 272, and this connection pipe 27 is inserted into the reserve tank 23.

  The reserve tank 23 is provided with the water level sensor 29 described above, and the water level sensor 29 includes detection electrodes 29A and 29B and a common electrode 29C. In this case, if the reserve tank 23 is made of a good conductor, the heat medium HM2 is always in contact, so the common electrode 29C may be installed on the bottom surface of the reserve tank 23, for example. The detection electrode 29A is an electrode for detecting the high level (H) of the heat medium HM2 in the reserve tank 23, and the detection electrode 29B is an electrode for detecting the low level (L) of the heat medium HM2 in the reserve tank 23. Therefore, if the heating medium HM2 in the reserve tank 23 is in contact with the detection electrode 29B, the level of the heating medium HM2 is low. If the heating medium HM2 is in contact with the detection electrode 29A, the heating medium HM2 It can be seen that the level is high.

  Next, the control device 82 will be described with reference to FIG. FIG. 6 shows an example of the control device. The configuration shown in FIG. 6 is an example, and the present invention is not limited to such a configuration. In FIG. 6, the same parts as those in FIGS. 1, 2, 3, 4, and 5 are denoted by the same reference numerals.

  The control device 82 is configured by a computer and includes a CPU (Central Processing Unit) 84, a ROM (Read-Only Memory) 86, a RAM (Random-Access Memory) 88, a timer 90, a counter 92, and the like. The CPU 84 executes a control program stored in the ROM 86, and generates a control output by processing such as calculation using the detected temperature as control information. The RAM 88 forms a program execution area. The timer 90 is an example of a time measuring means, and generates time information for time control such as a level detection time zone and a level detection interval. The counter 92 counts detection information that can be counted, and counts digitized information even if it is analog information.

  A remote control device 94 is connected to the control device 82 by wire or wirelessly. The remote control device 94 is a user operation device, and includes a control unit 96, an operation unit 98, and a display unit 100, and is installed in the user's living area.

  The control unit 96 receives an operation input from the operation unit 98 and notifies the control device 82 of control information based on the operation capability. The operation unit 98 includes a keyboard, a touch sensor, and the like. The control unit 96 is configured by a computer and includes a CPU 102, a ROM 104, a RAM 106, and the like. The CPU 102 executes a control program in the ROM 104 and generates a control output. The RAM 106 constitutes a program execution area. The control unit 96 cooperates with the control device 82, outputs a control command to the control device 82, receives output information from the control device 82, and provides a display output indicating a control state or the like to the display unit 100.

  The display unit 100 performs a visible display based on the presentation output provided from the control unit 96 based on the display control of the control unit 96.

  Next, the heating / hot water supply / remembrance device 2 will be described with respect to a heat transfer operation, a low temperature heating operation, a high temperature heating operation, a hot water supply operation, a bath pouring operation, a bath water retreating operation, and a solar heat collecting operation.

  (1) Heat transfer operation

  7 and 8 will be referred to for the processing procedure of this heat medium tensioning operation. 7 and 8 show an example of the processing procedure of the heat medium tensioning operation. In FIGS. 7 and 8, a and b indicate a connecting portion between the flowcharts.

  This processing procedure is an example of the heat medium tension control method of the present invention. In this processing procedure, as shown in FIG. 7, the heating medium tension mode is started by turning on the power. In this heat medium filling mode, the heat collection switching valve 16 is switched to the hot water storage tank 4 side closed (step S101), and the heat medium filling circuit in which the heat medium pack 33 is connected to the pressure tank 21 to the heat collection circuit 6 (FIG. 5). Make up.

  The pressure cap 25 of the pressure tank 21 is removed, a cap 272 is attached, the pipe 35 (FIGS. 4 and 5) is connected, and an antifreeze liquid that becomes the heating medium HM2 is injected (step S102). The switching of the water filling switch 87 (FIG. 6) is monitored (step S103). If the water filling switch 87 is ON (YES in step S103), the water filling display portion 89 is blinked (step S104), and the heating medium filling mode is set. Announce that there is.

  The heat collection switching valve 16 is set to the water filling position (step S105), and the heat collection pump 14 is operated (step S106). Thereby, the rotation speed N of the heat collecting pump 14 is set to the high rotation speed N1 (FIG. 9), and circulation of the heat medium HM2 is started at the rotation speed N1.

  The detection output of the water level sensor 29 is monitored (step S107), and it is confirmed whether the detection electrode 29B is conductive (high level H). When the water level sensor 29 detects a high level (H) (YES in step S107), the water filling display 89 is turned on (step S108), and the rotational speed N of the heat collecting pump 14 is operated at the high rotational speed N3 (step S109). ), The injection of the antifreeze liquid is terminated (step S110), and the process proceeds to step S116 (FIG. 8).

  If the water level sensor 29 does not detect the high level (H) in step S107 (NO in step S107), it is determined whether the rotational speed N of the heat collecting pump 14 is the high rotational speed N1 (step S111). If N is the high rotational speed N1 (YES in step S111), it is confirmed whether, for example, 20 [seconds] has elapsed as a predetermined time from the rotational speed N = N1 of the heat collecting pump 14 (step S112). If the predetermined time 20 [seconds] has elapsed since the rotation speed N = N1 of the heat collection pump 14 (YES in step S112), the heat collection pump 14 is set to the low rotation speed N2 for operation. (Step S113), the process proceeds to Step S116 (FIG. 8). If the predetermined time 20 [seconds] has not elapsed (NO in step S112), the process proceeds to step S116 (FIG. 8).

  In step S111, if the rotational speed N is not N1 (NO in step S111), it is confirmed whether or not a predetermined time, for example, 10 [seconds] has elapsed since the pump rotational speed N is rotated at the low rotational speed N2 (step S111). S114). If the predetermined time 10 [seconds] has elapsed from the rotation of the heat collection pump 14 at the rotation speed N = N2 (YES in step S114), the operation is performed by setting the rotation speed N of the heat collection pump 14 to the high rotation speed N1. (Step S115), and the process proceeds to Step S116 (FIG. 8). For example, if 10 [seconds] has not elapsed as the predetermined time (NO in step S114), the process proceeds to step S116 (FIG. 8).

  Check whether a certain time, for example, 60 [minutes] has elapsed since the start of water filling (step S116), and if it is before the fixed time 60 [minutes] (YES in step S116), confirm whether the water filling switch is OFF. (Step S117). If the water filling switch 87 is not OFF (NO in step S117), the process returns to step S107 (FIG. 7), and the above-described processing is continued.

  If the water filling switch 87 is OFF (YES in step S117), the water filling display portion is turned off (step S118). If, for example, 60 [minutes] have elapsed since the start of water filling (NO in step S116), the water filling display portion 89 is similarly turned off (step S118).

  The heat collecting switching valve 16 is switched to the hot water tank 4 side (step S119), the operation of the heat collecting pump 14 is stopped (step S120), and the injection of the heat medium is completed.

  According to such a process, the rotational speed N of the heat collecting pump 14 is alternately repeated between the high rotational speed N1 or N3 and the low rotational speed N2, thereby excluding air from the heat collecting circuit 6 and the heat as a heat medium. The heat collecting circuit 6 can be filled with the medium HM2.

  Next, the operation of the heat collecting pump 14 will be described with reference to FIG. FIG. 9 shows an example of the pump rotation speed table.

  In the pump rotation speed table 110, rotation speeds N1, N2, and N3 set for the heat collection pump 14 according to the installation height of the heat collection panel 10 are set. The installation height of the heat collecting panel 10 is divided into, for example, less than 6 [m] and 6 [m] or more, and rotation speeds N1, N2, and N3 are set, and the rotation speeds N1, N2 according to the height are set. , A dip switch 91 (FIG. 6) is provided as means for switching the setting of N 3, and the rotational speeds N 1, N 2, N 3 are set by the dip switch 91.

  In this embodiment, the pump rotation speed N is set to high rotation speeds N1 and N3 and a low rotation speed N2. When the height of the heat collecting panel 10 is less than 6 [m], N1 = N3 = 4600 [rpm] is set as the high rotation speed, and N2 = 2000 [rpm] is set as the low rotation speed.

  Further, when the height of the heat collecting panel 10 is 6 [m] or more, N1 = 4800 [rpm] and N3 = 4600 [rpm] are set as the high rotation speed, and N2 = 3500 [rpm] is set as the low rotation speed. Is done. When the installation height of the heat collection panel 10 is high, the lifting force of the heat collection pump 14 is set high in order to hold the heat medium HM2.

  By alternately setting the high rotation speeds N1, N3 and the low rotation speed N2 to the rotation speed N at predetermined time intervals, and adding the strength to the pump rotation speed, air is excluded from the heat collecting circuit 6. The heat collecting circuit 6 can be filled with the heat medium HM2.

  When the heat collecting pump 14 described above is operated, if the heat collecting pump 14 is operated at a constant speed, air remains in the heat medium HM2 in a bubble state, and particularly, the pipe is bent. Air remains on the Therefore, when the flow rate of the heating medium HM2 is changed, air in a bubble state moves, and the bubble-like air is connected to each other and grows into a large bubble. When the bubble becomes large, it is easy to push out with the heat medium HM2, and the air purge of the heat collecting circuit 6 is performed.

  Regarding the change in the flow rate of the heat medium HM2, the change in the flow rate of the heat medium can also be obtained by intermittent operation of the heat collection pump 14, but when the heat collection pump 14 in operation is stopped, the heat collection circuit 6 is a closed circuit. If there is no supply of heat medium, the level of the heat medium in the pressure tank 21 does not change. In this case, even if there is a return of the heat medium from the heat collecting pump 14 side, suction is generated from the opposite side accordingly. By the way, the heat collection panel 10 is installed in high places, such as a roof, and the heat collection pump 14 needs the lift force which raises the heat medium HM2 to the height. In this case, a corresponding internal pressure is applied to the piping of the heat collecting circuit 6 to expand the resin piping. When the heat collecting pump 14 is stopped with respect to this expansion, the internal pressure with respect to the pipe line of the heat collecting circuit 6 is released. As a result, the piping contracts, and the level of the heat medium HM2 in the pressure tank 21 increases by the contraction. If there is air in the pipe, the air expands, and the level of the heat medium HM2 further increases. This increase in the level of the heat medium presents a state in which the heat medium HM2 supplied from the outside does not enter the heat collecting circuit 6 (air purge end state), and causes a false recognition that the air purge is complete. Therefore, by alternately repeating the weak operation (low speed operation) and the strong operation (high speed operation) of the heat collecting pump 14 capable of maintaining the internal pressure of the pipe, the level of the heat medium HM2 during the stop operation is increased. It is avoiding.

  For the completion of the heating medium tension (air purge), a reserve tank 23 is installed together with the pressure tank 21, and the reserve tank 23 is provided with a water level sensor 29 for detecting the water level of the heating medium HM2. The sensor 29 detects a low level (L) and a high level (H).

  During normal operation, the heating medium HM2 in the sealed heat collecting circuit 6 including the pressure tank 21 expands and reaches a predetermined pressure or more, so that the heating medium HM2 flows into the reserve tank 23 and conversely becomes negative pressure when contracted. Then, the heat medium HM2 is sucked. When the water level of the heating medium HM2 falls below a low level (L), a warning or the like prompting replenishment of the heating medium HM2 is issued, and the heating medium such as coolant is supplied to the pressure tank 21 until the water level sensor 29 detects the high level (H). Replenish. In this case, when the control device 82 takes in the detection output of the water level sensor 29 and detects a low level output, a warning prompting the replenishment of the heating medium HM2 from the warning device 93 and a warning display on the water filling display unit 89 are used. That's fine.

  When heating medium is applied, as described above, 1 [cycle], 30 [second] pump strength operation is performed. During the strength operation, when the pressure medium 21 is filled with the heat medium HM2, the reserve tank 23 is used. Flowing into. In the initial stage of the heat medium tension, the amount of the heat medium HM2 flowing into the heat collecting circuit 6 is large, and the amount flowing from the pressure tank 21 to the reserve tank 23 is small. When the air purge of the heat collecting circuit 6 is promoted, the amount of the heat medium flowing through the reserve tank 23 increases. When the heat collecting pump 14 is operated for about 10 [cycles], the heat medium tensioning (air purge) of the heat collecting circuit 6 is completed.

  (2) Low temperature heating operation

  In this low-temperature heating operation, the high-temperature heat medium HM1 in the hot water storage tank 4 is mixed with the heat medium HM1 circulated through the low-temperature heater 52 to lower the temperature, and the heat medium HM1 having the required temperature is circulated through the low-temperature heater 52.

  (3) High temperature heating operation

  When an operation signal is input from the high-temperature heater 54 to the control device 82, the operation of the circulation pump 26 is started. The detected temperature T3 of the temperature sensor 42 and the detected temperature T4 of the temperature sensor 44 are compared. If T4> T3, the hot water tank switching valve 40 is opened on the hot water tank 4 side. The heat medium HM1 in the hot water storage tank 4 is sent from the circulation pump 26 to the secondary heat exchanger 30 and the primary heat exchanger 28. Combustion of the burner 46 is controlled so that the detected temperature T5 of the temperature sensor 48 on the outlet side of the primary heat exchanger 28 is, for example, 80 [° C.] as a constant temperature suitable for radiant heating. In addition, if the heat medium HM1 of the hot water storage tank 4 is a constant temperature suitable for heat radiation heating, for example, 80 [° C.], the heating by the primary heat exchanger 28 is not performed.

  The heated heating medium HM1 flows into the high-temperature heater 54 and dissipates heat. In this case, the heat medium HM1 that has flowed to the circulation path 8 and the high temperature distribution valve 62 is divided into the circulation path 8A, passes through the hot water supply heat exchanger 56, and joins with the return heat medium HM1 from the high temperature heater 54, thereby 4 is reached. In this case, the circuit of the hot water supply heat exchanger 56 formed by the circulation path 8A is used as a circulation circuit until the high-temperature heater 54 can be operated and a hot water supply heating path that can immediately respond to a hot water supply request.

  The heat medium HM1 from which heat has been removed through the high-temperature heater 54 and the return heat medium HM1 from the hot water supply heat exchanger 56 are mixed, and the mixed heat medium HM1 is detected by the temperature sensor 42. . This detected temperature T3 is compared with the detected temperature T4 of the temperature sensor 44 on the outlet side of the hot water storage tank 4. If T4 <T3, the opening degree of the hot water tank switching valve 40 is switched from the hot water tank 4 side to the branch channel 24 side, and the use of the heat medium HM1 in the hot water tank 4 is stopped. That is, heat is stored by the heat medium HM1 to save the heat.

  (4) Hot water supply operation

  The water supply W that has entered the heating / hot water supply / remembrance device 2 from the water supply port reaches the branch point of the bypass 60 through the temperature sensor 64, the water amount sensor, the water control valve, and the like. The water supply W flowing to the bypass 60 side is mixed with the hot water HW for mixing. Further, the feed water W that has flowed into the hot water supply heat exchanger 56 via the secondary heat exchanger 58 undergoes heat exchange with the heat of the heat medium HM1 in the hot water supply heat exchanger 56, and becomes the hot water HW, thereby the bypass 60. It passes through the mixing valve installed at the bifurcation point. The opening of the mixing valve is adjusted so that the detected temperature T8 of the temperature sensor 66 becomes the set temperature, and the hot water HW heated by the hot water supply heat exchanger 56 is mixed with the feed water W to be adjusted to the set temperature. The hot water is taken out from the hot spring outlet.

  In the circulation operation of the heating medium HM1, when the water amount sensor in the hot water supply circuit 36 senses flowing water, the circulation pump 26 starts operation. The detected temperature T3 of the temperature sensor 42 and the detected temperature T4 of the temperature sensor 44 are compared. When T4> T3, the hot water tank switching valve 40 is opened on the hot water tank 4 side. The heat medium HM <b> 1 in the hot water storage tank 4 is sucked into the circulation pump 26 and sent to the secondary heat exchanger 30 and the primary heat exchanger 28. The temperature of the heating medium HM1 that has passed through the primary heat exchanger 28 and the secondary heat exchanger 30 is detected by a temperature sensor 48, and the burner is set so that the detected temperature T5 is, for example, 80 [° C.] as a constant temperature. 46 combustion control is performed. If the heat medium HM1 in the hot water storage tank 4 is at a constant temperature, for example, 80 [° C.], the heating by the burner 46 is not performed.

  The heat medium HM1 at a constant temperature, for example, 80 [° C.] performs heat exchange with the water supply W side in the hot water supply heat exchanger 56. For example, when the hot water supply capacity is No. 24, the amount of heat is 41.86 [kW] (36,000 [kcal / h]). If the hot water temperature of the hot water storage tank 4 is 80 [° C.] and the circulation rate of the circulation pump 26 is about 12 [liter / min], the temperature of the heating medium HM1 returning to the hot water storage tank 4 is about 30 [° C.] If all the four heating media HM1 are used for hot water supply heat exchange, the hot water temperature in the hot water storage tank 4 is about 30 [° C.]. If the number of hot water supply numbers decreases, the temperature drop of the heating medium HM1 returning to the hot water storage tank 4 is small, and the hot water temperature of the hot water storage tank 4 is always 30 [° C.] or higher.

  Further, the detected temperature T3 of the heating medium HM1 deprived of heat by the hot water supply heat exchanger 56 and the detected temperature T4 of the temperature sensor 44 are compared. If T4 <T3, the hot water tank switching valve 40 is switched from the hot water tank 4 side to the branch channel 24 side, and the heat medium HM1 of the hot water tank 4 is not used. Thereby, the heat loss by use of the heat medium HM1 of the hot water storage tank 4 is suppressed.

  (5) Bathtub pouring operation

  When the hot water solenoid valve 78 is opened at the time of hot water supply, the hot water supply circuit 36 is connected to the remedy circuit 38, and the hot water HW flowing through the hot water supply circuit 76 branched from the hot water supply circuit 36 passes through the remedy heat exchanger 70. 68 is poured. In this case, the remedy pump 72 is not used. If the water supply W is clean water, there is sufficient water pressure, and the hot water HW is poured into the bathtub 68 using the water pressure.

  (6) Bath water tracking operation

  When a chasing operation signal is input from the remote control device 94 to the control device 82, the chasing pump 72 is started to operate. As a result, the bathtub water BW is circulated to the remedy circuit 38, and the heat of the heat medium HM1 is heat-exchanged by the remedy heat exchanger 70 to be heated. When the detected temperature T9 of the temperature sensor 74 reaches the set temperature, the chasing operation is ended and the chasing pump 72 is stopped.

  In this case, when the follow-up operation signal is input to the control device 82, the operation of the circulation pump 26 is started. The detected temperature T3 of the temperature sensor 42 and the detected temperature T4 of the temperature sensor 44 are compared. If T4> T3, the hot water tank switching valve 40 is switched to the hot water tank 4 side. The heat medium HM <b> 1 in the hot water storage tank 4 is sucked into the circulation pump 26 and sent to the secondary heat exchanger 30 and the primary heat exchanger 28. The temperature of the heating medium HM1 that has passed through the primary heat exchanger 28 and the secondary heat exchanger 30 is detected by a temperature sensor 48, and the burner is set so that the detected temperature T5 is, for example, 80 [° C.] as a constant temperature. 46 combustion control is performed. If the heat medium HM1 in the hot water storage tank 4 is at a constant temperature, for example, 80 [° C.], the heating by the burner 46 is not performed.

  The high temperature distribution valve 62 is also opened on the circulation path 8B side, the heating medium HM1 is caused to flow on the circulation path 8B side, and the heat of the heating medium HM1 is exchanged with the bath water BW between the tracking circuit 38 and the circulation path 8B. In this case, the high temperature distribution valve 62 also causes the heat medium HM1 to flow to the hot water supply heat exchanger 56 side. The heat medium HM1 deprived of the bath water BW by the heat exchanger for remedy 70 joins the heat medium HM1 that has passed through the hot water heat exchanger 56 in the circulation path 8A, and is returned to the hot water storage tank 4. The circulation path 8A passing through the hot water supply heat exchanger 56 from the high temperature distribution valve 62 is used as a hot water supply circuit that can immediately respond to a hot water supply request.

  Heat medium HM1 deprived of heat by remedy heat exchanger 70 is mixed with heat medium HM1 that has passed through hot water supply heat exchanger 56. The detected temperature T3 and the detected temperature T4 of the mixed heat medium HM1 are compared. If T4 <T3, the hot water tank switching valve 40 is switched from the hot water tank 4 side to the branch channel 24 side, and the hot medium HM1 of the hot water tank 4 is switched. Do not use. That is, heat is stored by the heat medium HM1 to save the heat.

  (7) Solar heat collection operation

  The temperature rise of the heating medium HM2 due to solar heat is related to the amount of solar radiation, and according to the test results, it has been confirmed that an increase of about 30 [° C.] can be expected even in winter. Regardless of the season, the hot water temperature of the hot water storage tank 4 is about 30 [° C.]. Therefore, in the hot water storage tank 4 including the solar heat exchanger 12 that exchanges heat with the heat medium HM2 that is a solar heat medium, 30 [ The temperature of the hot water storage tank 4 can be raised to about 60 [° C.] by 30 [° C.] + 30 [° C.]. In this case, if the required temperature of the low-temperature heater 52 described above is, for example, 60 [° C.], the heat of the heat medium HM1 stored in the hot water storage tank 4 can be used for heat dissipation of the low-temperature heater 52. Of course, more heat can be used in summer.

  With regard to the solar heat that can be used for the heat collecting circuit 6, the sunrise and sunset times vary depending on the season, and the time zone with solar radiation also varies. The operation start time and stop time of the heat collecting pump 14 are set in the control device 82 through the remote control device 94 according to the season (summer, winter, intermediate period). The season may be determined using the detected temperature T10 of the temperature sensor 80.

  Therefore, when the set time reaches the operation start time of the heat collecting pump 14, the heat collecting pump 14 is operated. The heat medium HM2 circulates in the heat collection circuit 6, and the temperature sensor 20 detects the temperature of the heat medium HM2 entering the heat collection panel 10. Since the heat collection panel 10 is means for heating the heat medium HM2 with solar heat, if there is solar radiation, the detected temperature T2 of the heat medium HM2 that has passed through the heat collection panel 10 rises. Therefore, if T2> T1, it is determined that solar heat is collected, and the operation of the heat collection pump 14 is continued. On the other hand, if T2 ≦ T1, the temperature of the heat medium HM2 that has passed through the heat collection panel 10 has decreased. Therefore, it is determined that there is no solar heat collection, and the operation of the heat collection pump 14 is stopped. End thermal operation.

  In this case, if there is a temperature rise (T2> T1) in the heat collecting panel 10, if the detected temperature T2 is lower than the detected temperature T4 of the temperature sensor 44 (T2 <T4), the heating medium HM1 of the hot water storage tank 4 is used. Heat is lost to the heating medium HM2, resulting in heat loss. In order to prevent this, the solar switching valve 16 is switched to the bypass path 18 side and circulated. This circulation continues until T2> T4. When T2> T4, the solar switching valve 16 is switched to the solar heat exchanger 12 side, and the heat of the heat medium HM2 is transferred to the heat medium HM1 in the hot water storage tank 4. Perform heat exchange. Then, when the set time is the stop time of the heat collecting pump 14, the operation of the heat collecting pump 14 is stopped.

  As a result, solar heat is collected in the heat medium HM2, and the heat of the heat medium HM2 is exchanged with the heat medium HM1, whereby heat can be stored in the hot water storage tank 4 through the heat medium HM1.

  The advantages and effects of the above embodiment are as follows.

  (1) By making the operation of the heat collection pump 14 under heat medium tension strong and weak, the heat medium during the weak operation of the heat collection pump 14 descends the pipe and repeats the seesaw state to push out the air in the pipe The heat medium can be applied without residual air.

  (2) This control can be done in the same way as normal work without adding any special work to the heating medium.

  (3) Since there is no residual air in the heat collecting circuit 6, the heat exchange efficiency of the solar heat to the heat medium can be increased.

  (4) The drive time of the heat collecting pump 14 required for heating medium tension can be reduced, and power consumption can be suppressed.

  (5) Although the pressure cap 25 is installed in the pressure tank 21 in the above embodiment, the pressure cap 25 may be installed in the pipe line of the heat collecting circuit 6.

[Other Embodiments]

  (1) In the above-described embodiment, the heat collecting circuit 6 is connected to the heating circuit of the high-temperature water distribution type heating / hot water supply heat source, the solar water is used as a heat source, and the high-temperature water obtained by heat exchange with the solar heat is used. Although utilized also for hot water supply and low temperature heating, this invention is not limited to what uses solar heat for such a heat source. The above-described embodiment is an example, and instead of solar heat, combustion heat or engine exhaust heat may be used as a heat source.

  (2) In the above embodiment, the heating media HM1 and HM2 are used as the heating media. However, a heating fluid such as an antifreeze liquid other than warm water may be used as the heating media HM1 and HM2.

  (3) In the above embodiment, the temperature sensor 44 for detecting the temperature of the heating medium HM1 in the hot water storage tank 4 is installed on the circulation path 8 side outside the hot water storage tank 4, but it is installed in the hot water storage tank 4. The temperature of the heating medium HM1 may be detected.

  (4) In the above embodiment, in the heat medium tensioning operation shown in FIG. 7 and FIG. 8, the heat collecting switching valve 16 is switched to the tank side closed (steps S101 and S119). The heat collection switching valve 16 may be switched to open in steps.

As described above, the most preferable embodiment and the like of the present invention have been described. However, the present invention is not limited to the above description, and is described in the claims or disclosed in the specification. It goes without saying that various modifications and changes can be made by those skilled in the art based on the above gist, and such modifications and changes are included in the scope of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be widely used for a hot water supply device using solar heat or combustion heat as a heat source, or a heat source device such as a heating / hot water supply / remembrance device.

2 Heating / hot water supply / remembrance device 6 Heat collecting circuit 10 Heat collecting panel 14 Heat collecting pump 21 Pressure tank 23 Reserve tank 25 Pressure cap 29 Water level sensor 33 Heat medium pack 82 Controller HM2 Heat medium

Claims (2)

A solar heat collector that collects solar heat and exchanges heat with a heat medium,
A circulation circuit for circulating the heat medium;
A storage tank for storing the heat medium;
Pressure that causes the heat medium to flow out of the circulation circuit to the storage tank when the pressure of the circulation circuit rises, and sucks the heat medium from the storage tank when the heat medium is insufficient in the circulation circuit A tank,
A water level sensor which detects the heat medium water level of the reservoir tank is installed in the storage tank,
Heat collecting means for collecting solar heat and exchanging heat with the heat medium;
A pump for circulating the heat medium in the circulation circuit;
When the heat medium is supplied to the pressure tank from the outside and the operation of the pump is started, the pump is operated at a first high-speed rotation, and the first high-speed rotation and the low-speed operation of the pump are performed every predetermined time. The operation with rotation is alternately repeated, and when the water level sensor detects that the heat medium water level in the storage tank has reached a predetermined water level, the pump is switched to operation with a second high-speed rotation, By terminating the operation of the pump after the operation at the second high-speed rotation, the heat medium supplied from the outside to the pressure tank is sent from the pressure tank to the heat collecting means and the circulation circuit, so that the heat collecting is performed. And a controller that fills the heating medium into the circulation circuit, and
A solar heat collecting apparatus comprising: A circulation circuit for circulating the heat medium; a storage tank for storing the heat medium; and when the pressure of the circulation circuit rises, the heat medium is caused to flow out of the circulation circuit to the storage tank, and the heat is passed to the circulation circuit. heat collecting a pressure tank to suck the heating medium from the storage tank when the medium is insufficient, the water level sensor which detects the heat medium water level of the reservoir tank is installed in the storage tank, the solar heat, the heating medium Heat collecting means for exchanging heat, a pump for circulating the heat medium in the circulation circuit, and a control unit for controlling the pump, and collecting heat of solar heat and heat of the solar heat collecting apparatus for heat exchange with the heat medium A medium tension control method,
Supplying a heat medium from the outside to the pressure tank;
When the operation of the pump is started, the pump is operated at a first high-speed rotation, and the operation at the first high-speed rotation and the low-speed rotation of the pump is alternately repeated every predetermined time. When it is detected that the heat medium water level in the storage tank has reached a predetermined water level, the pump is switched to the operation at the second high-speed rotation, and the operation of the pump is performed after the operation at the second high-speed rotation. The heat medium supplied from the outside to the pressure tank is sent from the pressure tank to the heat collecting means and the circulation circuit, and the heat collecting means and the circulation circuit are filled with the heat medium; ,
A heat medium tension control method for a solar heat collector, comprising:

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