JP5606141B2 - Heat source device and hot water supply device - Google Patents

Description

The present invention relates to, for example, a heat source device and a hot water supply device that use solar heat as a heat source.

  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, a plate heat exchanger is used for a heat source device used in a high-temperature water distribution type hot water heater or the like. In this plate heat exchanger, heat of the heat medium is exchanged with hot water to supply hot water. When leakage occurs in the plate heat exchanger, the supply water leaks to the heating circuit side due to the supply water pressure. Therefore, the rise in the water level in the heating tank is monitored and leakage detection is performed.

  When solar heat is used as a heat source, hot water stored in a hot water storage tank is used as a heating medium, so when a hot water storage tank is also used as a heating tank, the plate heat exchanger In some cases, leaks cannot be detected. In the time zone in which hot water in the hot water storage tank is frequently used or in the time zone in which solar heat is exchanged with hot water for heat storage, the level of hot water stored in the hot water storage tank varies. This is because this fluctuation level is expected to exceed the level fluctuation due to leakage of the plate heat exchanger.

Therefore, an object of the heat source device or the hot water supply device of the present invention is to increase the accuracy of abnormality detection due to water leakage in view of the above problems.

In order to solve the above problems, a heat source device of the present invention is a heat source device including a heat exchanging means for exchanging heat of a heat medium to clean water, a storage means for storing the heat medium, and the heat medium of the storage means. Level detecting means for detecting a level, temperature detecting means for detecting the temperature of the heat medium of the storage means, heat exchange means for exchanging the collected solar heat to the heat medium of the storage means , and collecting solar heat When a level detection time zone is set outside a heatable time zone (for example, 7:30 am to 5:00 pm) and the detection level of the level detection means is detected to be an abnormal level, the storage means The temperature of the heating medium is stored, and before the predetermined time elapses, the detected temperature of the temperature detecting means is lower than the stored temperature by a predetermined temperature and the detection level of the level detecting means in the level detection time zone Whether or not is at an abnormal level It determined, and a determination means for generating the decision output.

In such a configuration, since the level detection time zone is set in addition to the time zone in which solar heat can be collected , the level detection can be performed in a time zone in which there is no or little level fluctuation of the heat medium in the storage means. The accuracy of detecting whether or not the level is abnormal is improved.

In order to solve the above-described problem, in the heat source device, when the determination unit further generates a determination output indicating that the temperature detected by the temperature detection unit is lower than the stored temperature by a predetermined temperature and an abnormal level. In addition, warning generation means for issuing a warning may be provided. In such a configuration, it can be notified that the heat medium of the storage means has reached an abnormal level, which contributes to speeding up the necessary response.

In order to solve the above-described problems, a hot water supply apparatus of the present invention is a hot water supply apparatus including a heat exchanging means for exchanging heat from a heat medium to clean water, a storage means for storing the heat medium, and the heat medium of the storage means. Level detecting means for detecting a level, temperature detecting means for detecting the temperature of the heat medium of the storage means, heat exchange means for exchanging the collected solar heat to the heat medium of the storage means , and collecting solar heat When a level detection time zone is set in addition to the heatable time zone and the detection level of the level detection means is detected as an abnormal level, the temperature of the heat medium in the storage means is stored, and a predetermined time elapses. Before, it is determined whether or not the detected temperature of the temperature detecting means is lower than the stored temperature by a predetermined temperature and the detection level of the level detecting means is an abnormal level in the level detection time zone, and the determination output is generated Judgment means to It is provided.

In such a configuration, similarly to the heat source device described above, since the level detection time zone is set in addition to the time zone in which solar heat can be collected, the time during which there is no or little level fluctuation of the heat medium in the storage means Level detection can be performed with a band, and the detection accuracy of whether or not the level is abnormal is improved.

In order to solve the above-described problem, in the hot water supply apparatus, when the determination unit further generates a determination output indicating that the temperature detected by the temperature detection unit is lower than the stored temperature by a predetermined temperature and an abnormal level. And warning means for issuing a warning may be provided. In such a configuration, similarly to the heat source device, it can be notified that the heat medium of the storage means has reached an abnormal level, which contributes to speeding up the necessary response.

  According to the heat source device or hot water supply device of the present invention described above, any of the following effects can be obtained.

  (1) It is possible to determine with high accuracy that the heat medium of the storage means has reached an abnormal level, and to improve the detection accuracy of leakage of the heat exchange means composed of plate heat exchangers, etc., and a reliable heat source A device can be realized.

(2) According to the detection of the level abnormality of the heat medium in the storage means, it is possible to detect not only the leakage of the heat exchange means constituted by a plate heat exchanger or the like, but also the leakage of the supplementary water solenoid valve.

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 1st Embodiment. It is a figure which shows an example of the heat collecting part of a solar heat, a water level detection part, and a hot water storage tank. It is a figure which shows an example of a water level confirmation tank and a water level detection. It is a figure which shows an example of a control apparatus and a remote control device. It is a flowchart which shows an example of the process sequence of water supply leak determination. It is a flowchart which shows an example of the process sequence of water supply leak determination. It is a figure which shows an example of the water level detection part and hot water storage tank which concern on 2nd Embodiment.

[First Embodiment]

  The first embodiment includes the heat source device of the present invention and realizes the functions of heating, hot water supply, and bath water tracking. The level of the hot water storage tank is detected on the water level confirmation tank side, and the detection level obtained in a time zone other than the solar heat collection time (for example, 7:30 am to 5:00 pm) is judged as an abnormal level. Used for.

  The first embodiment will be described with reference to FIG. 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 heat source device or hot water supply device of the present invention, and circulates a hot water storage tank 4, a solar heat collecting circuit 6, and hot water HM1, as shown in FIG. And a circulation path 8.

  The hot water storage tank 4 is an example of a storage unit that stores hot water HM1 as a first heat medium, and is also an example of a heat storage unit that stores heat using the hot water HM1. A water level confirmation tank 5 is connected to the hot water storage tank 4 as a water level confirmation means for the hot water HM1 by a communication pipe 7, and the water level confirmation tank 5 and the hot water storage tank 4 are connected by a vent pipe 11 and are opened to the atmosphere. A water level sensor 9 is installed in the water level confirmation tank 5. The hot water HM1 in the hot water storage tank 4 flows into the water level confirmation tank 5 through the communication pipe 7, and the water level in the water level confirmation tank 5 exhibits the same level as the water level of the hot water HM1 in the hot water storage tank 4. Therefore, the water level sensor 9 can obtain an output indicating the level of the hot water HM1 in the hot water storage tank 4.

  The water level confirmation tank 5 is connected to a supply line 13 for supplying make-up water, and the supply line 13 is connected to a water supply line. A supply water closing valve 15 and a supply water electromagnetic valve 17 are installed in the supply line 13. The makeup water closing valve 15 is always opened, and the makeup water is controlled by a makeup water electromagnetic valve 17. Clean water W is used as makeup water.

  The heat collecting circuit 6 is an example of a heat collecting unit that uses solar heat as a heat source, and is an example of a unit that circulates the hot water HM2 as a second heat medium and exchanges heat between the solar heat and the hot water HM1. 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 solar switching valve 16, and a bypass 18. The heat collection panel 10 is an example of a heat exchange unit that collects solar heat and exchanges the heat with the hot water HM2. Instead of the heat collection panel 10, a heat source using combustion heat or exhaust heat may be used. The solar heat exchanger 12 is an example of means for exchanging heat of the hot water HM2 to the hot water HM1. The heat collecting pump 14 is an example of a hot water pumping means used when exchanging solar heat with the hot water HM2 or when exchanging heat with the hot water HM1. The bypass 18 is a side path of the solar heat exchanger 12 that branches the heat collecting circuit 6 via the solar switching valve 16, and circulates the hot water HM2 when the temperature of the hot water HM2 is low. A temperature sensor 20 is installed on the entry side of the heat collection panel 10, and a temperature sensor 22 is installed on the exit side of the heat collection panel 10, and the temperature T 1 detected by the temperature sensor 20 is after the heat exchange of the hot water HM 2 by the solar heat exchanger 12. The detected temperature T2 of the temperature sensor 22 is the temperature of the hot water HM2 before heat exchange, and these detected temperatures T1 and T2 are used to open and close the bypass 18 and control the heat collecting pump 14 by switching the solar switching valve 16. Used.

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

  The diversion channel 24 is a pipe connected to the circulation path 8 between the inlet side and the outlet side of the hot water storage tank 4, and is a means for diverting the hot water HM1 and joining it with the hot water HM1 on the outlet side of the hot water storage tank 4. It is an example.

  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 hot water HM1 that is a heating medium, and the temperature sensor 42 is a second temperature sensor that detects the temperature of the hot water 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 hot water HM1.

  The circulation pump 26 is an example of a pumping means for the hot water HM1, and is driven when the hot water HM1 is used for heat or heated by the primary heat exchanger 28 and the secondary heat exchanger 30, and the hot water HM1 is supplied to the circulation path 8. Circulate.

  The primary heat exchanger 28 is a first heat exchanging means that mainly exchanges sensible heat from the combustion exhaust of the burner 46 installed as an example of the fuel gas combustion means to the hot water 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 hot water HM1, and is used for preheating the hot water 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 is branched 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 side hot water HM1 in the low-temperature heater 52. . The low-temperature heater 52 is an example of a first heat radiation load or heat radiation means of the hot water 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 side hot water 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 hot water 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 hot water 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, the bypass passage 60, Is provided.

  The hot water supply heat exchanger 56 is an example of hot water supply heat exchanging means for exchanging heat of the hot water 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 hot water HM1 circulates through the circulation path 8A. When water leakage due to perforation occurs in the hot water heat exchanger 56, the water pressure overcomes the pressure of the hot water HM1, the water enters the hot water HM1 side, and the water level of the hot water storage tank 4 is 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 hot water 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 hot water 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 hot water 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. The warm water 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. 4) 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 control device 82 (FIG. 4). Controlled by drive output.

  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 sensor 44 detects the temperature of the outlet-side hot water HM 1. 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.

  The heat collection circuit 6 includes a pressure tank 21 and a reserve tank 23. The pressure tank 21 is a pressure buffer for the hot water HM2 flowing through the heat collecting circuit 6 and is connected to the reserve tank 23 by a connecting portion 25. The hot water HM2 is allowed to escape from the heat collecting circuit 6 to the reserve tank 23 through the connecting portion 25, and if the hot water HM2 is insufficient, the hot water HM2 in the reserve tank 23 is drawn into the pressure tank 21 and supplied to the heat collecting circuit 6.

  Next, FIG. 3 is referred about the level detection of the water level confirmation tank 5. FIG. FIG. 3 shows an example of a water level confirmation tank and a water level sensor. 3, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals.

  The water level confirmation tank 5 is connected to the communication pipe 7 at the bottom, the replenishment pipe 13 and the vent pipe 11 to the ceiling, and the overflow pipe 19. The overflow pipe 19 is set to the upper limit level UL of the hot water HM1 in the water level confirmation tank 5, and causes the hot water HM1 to flow out when the hot water HM1 exceeds the upper limit level UL.

  The water level confirmation tank 5 communicates with the hot water HM1 in the hot water storage tank 4 through the communication pipe 7 and communicates with the outside air through the vent pipe 11, so that the hot water HM1 in the water level confirmation tank 5 exhibits the same level as the hot water storage tank 4.

  When the replenishing water electromagnetic valve 17 is opened to the water level confirmation tank 5, replenishment water is supplied through the replenishment pipe 13, and this replenishment water is replenished from the water level confirmation tank 5 to the hot water storage tank 4 through the communication line 7. As a result, the hot water storage tank 4 can be compensated for the shortage of the hot water HM1.

  Therefore, the water level sensor 9 installed in the water level confirmation tank 5 is an example of a level detection means, and includes detection electrodes 9A, 9B, 9C and a common electrode (COM) 9D. The detection electrode 9A is an electrode for detecting a low level (LL), the detection electrode 9B is an electrode for detecting a high level (HL), and the detection electrode 9C is an electrode for detecting an upper limit level (UL). In this case, the common electrode 9D is installed on the bottom surface of the water level confirmation tank 5, but when the water level confirmation tank 5 and the communication pipe 7 are made of a good conductor, either the water level confirmation tank 5 or the communication pipe 7 is used. You may install in the position.

  With such a configuration, the water level can be detected by contacting the detection electrodes 9A, 9B, 9C and the common electrode 9D, and the low level LL, the detection electrode 9A, The high level HL can be detected as long as it is within the range touching 9B, and the upper limit level UL can be detected within the range touching the detection electrodes 9A, 9B, 9C.

  Therefore, when the hot water HM1 falls below the low level LL, the replenishment mode is set, and the replenishment water electromagnetic valve 17 is opened and the hot water HM1 as the clean water W is replenished until it reaches the high level HL. In the normal state, the hot water HM1 is controlled in the range from the low level LL to the high level HL.

  Further, when the hot water HM1 reaches the upper limit level UL, it is determined as an abnormal level based on the detection output of the upper limit level UL of the water level sensor 9. This determination operation is executed by the CPU 84 (FIG. 4) of the control device 82 or the like.

  Next, the control device 82 will be described with reference to FIG. FIG. 4 shows an example of the control device. The configuration shown in FIG. 4 is an example, and the present invention is not limited to such a configuration. 4, the same parts as those in FIGS. 1, 2, and 3 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 sets a level detection time zone in addition to the time zone in which solar heat is exchanged with the heat medium, and determines whether or not the detection level of the water level sensor 9 as the level detection means is an abnormal level in this level detection time zone, It is an example of a determination means that generates the determination output, and executes a control program in the ROM 86, and generates a control output by processing such as calculation using the detected temperature or the like 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. The control device 82 is connected with a warning device 93 for notifying the occurrence of an abnormal level when the detection level of the water level sensor 9 is an abnormal level based on the determination output described above. The warning device 93 is an example of warning means, and an alarm may be displayed by providing a display.

  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. The display unit 100 may be configured as a warning unit in the same manner as the warning device 93 described above, and the alarm display described above may be displayed on the display unit 100.

  Next, referring to FIG. 5 and FIG. 6 for the water leakage determination operation of the heating / hot water supply / remembrance device 2. 5 and 6 show an example of the processing procedure of the water leak determination operation. FIGS. 5 and 6 show a connecting portion between the flowcharts.

  The processing procedure of this water leak determination operation is an example of the control operation of the heating / hot water supply / remembrance device 2, and the tank water level of the hot water storage tank 4 is normal when the power is turned on as shown in FIG. If the tank water level is abnormal (NO in step S101), an alarm indicating the abnormal water level is generated (step S102). This alarm is notified by a warning device 93.

  If the tank water level is normal (YES in step S101), it is confirmed whether or not a predetermined time, for example, 240 [hour] has elapsed since the previous check (step S103), and if 240 [hour] has not elapsed. (NO in step S103), the process returns to step S101, and if 240 [time] has elapsed (YES in step S103), whether or not the tank water level has reached the upper limit level UL, that is, the water level sensor 9 It is determined whether the detection electrode 9C is conductive (step S104). If the tank water level has not reached the upper limit level UL (NO in step S104), the process returns to step S101. If the tank water level has reached the upper limit level UL (YES in step S104), the temperature in the tank, that is, hot water HM1. It is determined whether the temperature is lower than a predetermined temperature, for example, lower than 40 [° C.]. If it is not less than 40 [° C.] (NO in step S105), the process returns to step S101. If it is less than 40 [° C.] (YES in step S105), it is determined whether or not there is another operation (step S106). ). If there is another operation (NO in step S106), the process returns to step S101, and if there is no operation (YES in step S106), the hot water tank switching valve 40 is opened to the tank side and the on-off valve 43 is switched to open ( In step S107, the circulation pump 26 is operated (step S108).

  The thermal valves of the connected low temperature heater 52 and high temperature heater 54 are opened (step S109), and it is determined whether or not there is another operation (step S110). If there is another operation (NO in step S110), the operation of the circulation pump 26 is stopped (step S111), and the thermal valves of the low temperature heater 52 and the high temperature heater 54 connected are closed (step S112). Return to step S104.

  If there is no other operation (YES in step S110), it is determined whether or not the pump operation of the circulation pump 26 has passed for a certain time, for example, 8 [minutes] (step S113). If it is within 8 [minutes], steps S108 to S113 are repeatedly executed, and after 8 [minute] pump operation (YES in step S113), the circulation pump 26 is stopped (step S114: FIG. 6).

  The hot water tank switching valve 40 is opened on the side of the branch flow path 24 and the on-off valve 43 is closed (step S115), and the thermal valves of the low temperature heater 52 and the high temperature heater 54 connected are closed (step S116). The measured value of the timer 90 that measures 240 [time] is cleared (step S117), and the stored maximum temperature is cleared (step S118). It is determined whether or not the tank water level has reached the upper limit level UL, that is, whether the detection electrode 9C of the water level sensor 9 is conductive (step S119). If the tank water level has not reached the upper limit level UL (NO in step S119) ), The process returns to step S101 (FIG. 5), and if the upper limit level UL is reached (YES in step S119), the tank temperature, that is, the maximum temperature of the hot water HM1 is stored (step S120), and a predetermined time For example, it is detected whether it is before the elapse of 240 [hours] (step S121). If 240 [hour] has elapsed (NO in step S121), the process returns to step S104 (FIG. 5). If 240 [hour] has not elapsed, whether or not the tank water level is equal to or higher than the lower limit level LL. That is, it is determined whether or not the detection electrode 9A of the water level sensor 9 is conductive (step S122). If the detection level 9A is equal to or higher than the lower limit level LL (YES in step S122), only a constant temperature, for example, 20 [° C.] from the tank maximum temperature. It is determined whether or not it is lowered (step S123).

  If there is no drop of 20 [° C.] or more from the maximum tank temperature (NO in step S123), the process returns to step S120, and the processes in steps S120 to S123 are performed. If it has decreased by 20 [° C.] from the maximum tank temperature (YES in Step S123), it is determined whether or not the tank water level has reached the upper limit level UL (Step S124). If the upper limit level has been reached (YES in step S124), an alarm is issued (step S125), and an abnormal level is notified.

  If the tank water level has not reached the upper limit level UL (NO in step S124), it is determined whether the tank water level is equal to or higher than the lower limit level LL (step S126). If it is not less than the lower limit level LL (YES in step S126), it is determined whether or not the heat collecting operation is in progress (step S127). If not in the period (NO in step S127), the process returns to step S124 to return to the inside of the tank. If the water level is monitored and the heat collecting operation is being performed (YES in step S127), the process returns to step S101.

  In this way, if it is summer based on sunshine hours as the heat collection operation period, for example, if it is from 7:30 am to 5:00 pm, level determination within that period is avoided, and heat collection operation and hot water HM1 are used. Since the level determination is performed during the period when it is not performed, the accuracy of the level determination can be increased. As a result, it can be determined whether or not the abnormal level is due to leakage of the hot water supply heat exchanger 56 or the abnormal level due to abnormality of the makeup water electromagnetic valve 17.

  Next, with regard to the heating / hot water supply / remembrance device 2, a low temperature heating operation, a high temperature heating operation, a hot water supply operation, a bath pouring operation, and a bath water retreat operation using the hot water HM1 of the hot water storage tank 4 will be described. A heat collecting operation for heating the above will be described.

  (1) Low temperature heating operation

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

  (2) 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. Hot water 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. If the hot water HM1 in 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 hot water HM1 flows into the high-temperature heater 54 and dissipates heat. In this case, the hot water HM1 flowing into the circulation path 8 and the high temperature distribution valve 62 is diverted to the circulation path 8A, passes through the hot water supply heat exchanger 56, joins with the return hot water HM1 from the high temperature heater 54, and enters the hot water storage tank 4. It reaches. 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 hot water HM1 deprived of heat through the high-temperature heater 54 and the return hot water HM1 from the hot water supply heat exchanger 56 are mixed, and this mixed hot water HM1 is detected by the temperature sensor 42. The detected temperature T3 of the temperature sensor 42 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 flow path 24 side, and the use of the hot water HM1 in the hot water tank 4 is stopped. That is, heat is stored by the hot water HM1 to save the heat.

  (3) 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 is subjected to heat exchange with the hot water HM1 in the hot water supply heat exchanger 56, and becomes hot water HW. Passes the mixing valve installed at the branch 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 hot water 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. Hot water HM1 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 hot water HM1 that has passed through the primary heat exchanger 28 and the secondary heat exchanger 30 is detected by the temperature sensor 48, and the burner 46 is adjusted so that the detected temperature T5 is, for example, 80 [° C.]. The combustion control is performed. If the hot water 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 hot water HM1 at a constant temperature, for example, 80 [° C.] performs heat exchange with the hot 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 hot water HM1 returning to the hot water storage tank 4 is about 30 [° C.] If all of the hot water HM1 is used for hot water supply heat exchange, the temperature of the hot water 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 hot water 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 hot water 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 storage tank switching valve 40 is switched from the hot water storage tank 4 side to the branch flow path 24 side, and the hot water HM1 of the hot water storage tank 4 is not used. Thereby, the heat loss by use of the hot water HM1 of the hot water storage tank 4 is suppressed.

  (4) Bath 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.

  (5) 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. Thereby, the bathtub water BW is circulated to the reheating circuit 38, and heat of the hot water HM1 is heat-exchanged and heated by the reheating heat exchanger 70. 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. Hot water HM1 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 hot water HM1 that has passed through the primary heat exchanger 28 and the secondary heat exchanger 30 is detected by the temperature sensor 48, and the burner 46 is adjusted so that the detected temperature T5 is, for example, 80 [° C.]. The combustion control is performed. If the hot water 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 warm water HM1 is allowed to flow on the circulation path 8B side, and the heat of the warm water HM1 is exchanged with the bath water BW between the remedy circuit 38 and the circulation path 8B. In this case, the high temperature distribution valve 62 also flows the hot water HM1 to the hot water supply heat exchanger 56 side. The hot water HM1 deprived of the bath water BW by the heat exchanger for remedy 70 merges with the hot water HM1 that has passed through the hot water supply 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.

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

  (6) Solar heat collection operation

  The temperature rise of the hot water 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.], so the hot water storage tank 4 including the solar heat exchanger 12 that exchanges heat with the hot water HM2 that is a solar heat medium is 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 hot water 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. Depending on the season (summer / winter / intermediate), the operation start time and stop time of the heat collecting pump 14 may be stored in the control device 82 in advance, or may be set in the control device 82 through the remote control device 94. is there. The season may be determined using the detected temperature T10 of the temperature sensor 80.

  Therefore, when the time comes to the operation start time of the heat collecting pump 14, the heat collecting pump 14 is operated. The hot water HM2 circulates in the heat collecting circuit 6, and the temperature sensor 20 detects the temperature of the hot water HM2 entering the heat collecting panel 10. Since the heat collection panel 10 is means for heating the hot water HM2 with solar heat, if there is solar radiation, the detected temperature T2 of the hot water 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 hot water HM2 that has passed through the heat collection panel 10 has decreased, so it is determined that there is no solar heat collection, the operation of the heat collection pump 14 is stopped, and the heat collection End the 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 hot water HM1 in the hot water storage tank 4 Heat is lost to the hot water 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 hot water HM2 is exchanged with the hot water HM1 in the hot water storage tank 4. I do. 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, by collecting solar heat in the hot water HM2 and exchanging heat of the hot water HM2 for the hot water HM1, heat can be stored in the hot water storage tank 4 through the hot water HM1.

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

  (1) In the high-temperature water distribution type hot water heater, the heat exchanger 56 exchanges heat with the hot water using the plate heat exchanger. If a leak occurs in the plate heat exchanger, the hot water pressure is supplied to the heating circuit side. Leakage can be detected when water flows in and the water level in the hot water storage tank 4 rises. In a system that uses solar heat as a heat source, when the hot water storage tank 4 is also used as a heating tank, the water level rises due to a temperature rise due to solar heat, and the water level drops due to the use of the hot water HM1 in the hot water storage tank 4. If a leak is detected only by this water level change, the leak may not be detected accurately. However, in the above embodiment, such inconvenience can be avoided.

  (2) Since the hot water HM1 in the hot water storage tank 4 is used, even if it is determined that there is no leakage due to a drop in the water level in the hot water storage tank 4, the detection continues for a time other than the heat collection operation time, so that the leak detection can be performed reliably.

  (3) Furthermore, even if the water level in the hot water storage tank 4 falls and it is judged that there is no leak, leak detection can be performed at a time other than the heat collection operation time. In addition to the hot water supply heat exchanger 56, it is possible to detect an open state due to a malfunction of the makeup water solenoid valve 17 and a leak due to a solenoid valve failure.

[Second Embodiment]

  In the second embodiment, the water level confirmation tank shown in the first embodiment is combined with the storage means.

  As shown in FIG. 7, the water level confirmation unit 105 conceived in the water level confirmation tank 5 (FIG. 1) described above is installed in the upper part of the hot water storage tank 4, and the water level sensor 9 described above is installed in the water level confirmation unit 105. It is good also as a structure.

  With such a configuration, it is not necessary to install the hot water storage tank 4 and the water level confirmation tank 5 separately, and the communication pipe 7 can be omitted and the ventilation pipe 11 can be simplified.

[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 hot water HM1 and HM2 are used as the heat medium, but a heat medium fluid other than the hot water may be used.

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

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 4 Hot Water Storage Tank 5 Water Level Confirmation Tank 6 Heat Collection Circuit 8 Circulation Path 9 Water Level Sensor 12 Solar Heat Exchanger 17 Supply Water Solenoid Valve 24 Branch Flow Path 32 Low Temperature Heating Circuit 34 High Temperature Heating Circuit 40 Hot Water Storage Tank Switching valve 42, 44 Temperature sensor 56 Hot water supply heat exchanger 82 Control device

Claims (4)

A heat source device comprising heat exchange means for exchanging heat from the heat medium to clean water,
A storage means for storing a heat medium;
Level detection means for detecting the level of the heat medium of the storage means;
Temperature detection means for detecting the temperature of the heating medium of the storage means;
Heat exchange means for exchanging heat from the collected solar heat to the heat medium of the storage means ;
When a level detection time zone is set in addition to a time zone in which solar heat can be collected, and when it is detected that the detection level of the level detection unit is an abnormal level, the temperature of the heating medium of the storage unit is stored, and a predetermined time Before the elapse of time, it is determined whether or not the detected temperature of the temperature detecting means is lower than the stored temperature by a predetermined temperature and the detected level of the level detecting means is an abnormal level in the level detection time zone. A determination means for generating an output;
A heat source device comprising: And a warning generating means for issuing a warning when the determination means generates a determination output indicating that the temperature detected by the temperature detection means is lower than the stored temperature by a predetermined temperature and an abnormal level;
The heat source device according to claim 1, further comprising: A hot water supply apparatus provided with heat exchange means for exchanging heat from the heat medium to clean water,
A storage means for storing a heat medium;
Level detection means for detecting the level of the heat medium of the storage means;
Temperature detection means for detecting the temperature of the heating medium of the storage means;
Heat exchange means for exchanging the collected solar heat to the heat medium of the storage means ;
When a level detection time zone is set in addition to a time zone in which solar heat can be collected, and when it is detected that the detection level of the level detection unit is an abnormal level, the temperature of the heating medium of the storage unit is stored, and a predetermined time Before the elapse of time, it is determined whether or not the detected temperature of the temperature detecting means is lower than the stored temperature by a predetermined temperature and the detected level of the level detecting means is an abnormal level in the level detection time zone. A determination means for generating an output;
A hot water supply apparatus comprising: A warning means for issuing a warning when the determination means generates a determination output indicating that the temperature detected by the temperature detection means is lower than the stored temperature by a predetermined temperature and an abnormal level;
The hot water supply apparatus according to claim 3, comprising:

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