JP5944614B2 - Heat source equipment - Google Patents

Description

The present invention relates to a heat source apparatus for heat exchange tank for storing the heat medium of the warm water, for example, relates to a heat source equipment utilizing solar 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 gas is not discharged.

  With regard to this 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 a heat medium collected by the solar heat collector is installed in the first heat exchanger. It is known to circulate and exchange heat, and to exchange heat of hot water heated by a boiler 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

  Regarding heating in a living space, two systems of a high temperature (for example, 80 [° C]) side heat source are used for air conditioning heating and a low temperature (for example, 60 [° C], 40 [° C]) side heat source is used for floor heating. It is done. In a solar system using solar heat, when hot water heated by solar heat collection is used for heating, if the temperature of hot water stored in hot water is lower than the required temperature, it may be heated to the required temperature with the combustion heat of the burner. Moreover, if the temperature of the hot water storage hot water is higher than the required temperature, the hot water cannot be circulated through the heating circuit. In this case, it is necessary to lower the hot water temperature to the required temperature with a heat medium such as low-temperature water, and the utilization efficiency of the heat energy is lowered by the amount that the hot water temperature is lowered to the required temperature.

Accordingly, an object of the present invention is to increase the utilization efficiency of thermal energy in view of the above problems.

Heat source equipment of the present invention, the heating medium was heat storage and stored in the storage means, and the circulation flow rate to flow passing through the heat radiation load and heat radiation unit heat medium to the storage unit side, and partitioned between circulation flow rate flowing through the shunt roadside Thus, the heat energy is saved by combining the two and suppressing the heat radiation by minimizing the use of the heat energy of the storage heat medium of the storage means.

The heat source device of the present invention includes a storage unit that stores a heat medium, a circulation path that circulates the heat medium to a heat radiation load, a heat exchange unit that is installed in the circulation path and heats the heat medium by heat exchange, The heat medium that is formed in the circulation path between the entry side and the exit side of the storage means, diverts the heat medium that has passed through the heat radiation load, bypasses the storage means, and stores the storage medium on the exit side of the storage means. A flow distribution unit that distributes the flow path to the storage medium and the flow rate of the heat medium that flows to the storage unit and the flow rate of the heat medium that flows to the storage path And a first temperature sensor that detects the temperature of the heat medium in the storage means, and a second temperature sensor that detects the temperature of the heat medium that passes through the heat radiation load and returns to the circulation path. The detected temperature of the first temperature sensor is the second temperature sensor. It is lower than the required temperature of and higher than the detection temperature of said heat radiation load, flowing the heat medium having passed through the heat radiation load only in the storing means by changing the distribution ratio of the heating medium by the flow distribution means, By heating the heat medium provided from the storage means by the heat exchange means, the temperature of the heat medium flowing through the heat radiation load is adjusted to the required temperature of the heat radiation load, and the first temperature sensor When the detected temperature is higher than the detected temperature of the second temperature sensor and higher than the required temperature of the heat medium load, the distribution ratio of the heat medium by the flow rate distribution means is adjusted to adjust the storage means and the branch flow path. Flowing the heat medium that has passed through the heat radiation load on both sides, and mixing the heat medium provided from the storage means and the heat medium flowing through the branch flow path, the heat medium flowing through the heat radiation load Warm It is adjusted to the required temperature of the heat dissipation load, when the detected temperature of the second temperature sensor is detected temperature above the first temperature sensor, to change the distribution ratio of the flow distribution means, the heat radiation load The heat medium that has passed through is flowed only through the branch channel.

  (1) Since the use of the heat energy stored in the storage means by the heat medium is minimized and can be optimized, the use efficiency of the heat energy can be increased.

(2) The amount of heat energy used can be adjusted by the temperature of the heat medium on the storage means side and the temperature of the heat medium radiated by the heat radiating load or the heat radiating means, which can contribute to a reduction in equipment costs.

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 a control apparatus and a remote control device. It is sectional drawing which shows an example of a hot water storage tank switching valve. It is a figure which shows the switching function of a hot water storage tank switching valve. It is a figure which shows the control position and control content of a hot water tank switching valve. It is a figure which shows the flow volume switching by a hot water storage tank switching valve. It is a figure for demonstrating the low-temperature heating operation | movement using a hot water storage tank. It is a flowchart which shows the low-temperature heating operation | movement using a hot water storage tank. It is a figure for demonstrating the low-temperature heating operation | movement using a hot water storage tank. It is a figure for demonstrating the high temperature heating operation | movement using a hot water storage tank. It is a figure for demonstrating the hot water supply operation | movement using a hot water storage tank. It is a figure for demonstrating the pouring operation | movement using a hot water storage tank. It is a figure for demonstrating the memorial operation using a hot water storage tank. It is a figure for demonstrating heat collection operation | movement. It is a flowchart which shows heat collection operation | movement. It is a figure which shows the heating / hot water supply / remembrance device which concerns on 2nd Embodiment.

[First Embodiment]

  The first embodiment will be described with reference to FIG. FIG. 1 is a diagram showing a heating / hot water supply / remembrance device. The configuration shown in FIG. 1 is an example, and the present invention is not limited to such a configuration.

  The heating / hot water supply / remembrance device 2 is an example of a heat source device or a heating device. The heating / hot water supply / remembrance device 2 includes a hot water storage tank 4 that stores hot water HM1 as a first heat medium, and a circulation path 6 that circulates the hot water HM1. The hot water storage tank 4 is an example of a storage unit that stores the hot water HM1, and also an example of a heat storage unit that stores heat using the hot water HM1.

  The hot water storage tank 4 is provided with a solar heat collecting circuit 8 as a heating means for the hot water HM1. This solar heat collecting circuit 8 is an example of means for collecting heat using solar heat as a heat source, circulating hot water HM2 as a second heat medium, and exchanging the heat to the hot water HM1. The solar heat collecting circuit 8 includes a heat collecting panel 10, a solar heat exchanger 12 as a heat exchange unit, a heat collecting 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 path 18 branches the solar heat collecting circuit 8 via the solar switching valve 16 and is a side path of the solar heat exchanger 12 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 before 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 after heat exchange, and these detected temperatures are used to open and close the bypass 18 and control the heat collecting pump 14 by switching the solar switching valve 16.

  The circulation path 6 is provided with 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 as means for using the heat of the hot water HM1. A low temperature heating circuit 32, a high temperature heating circuit 34, a hot water supply circuit 36, and a memorial circuit 38 are provided.

  The diversion channel 24 is a pipe connected to the circulation path 6 between the entry side and the exit 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 exit side of the storage tank 4. It is an example. A hot water storage tank switching valve 40 is installed at a branch point between the circulation path 6 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 6 on the inlet side of the hot water tank switching valve 40, and a temperature sensor 44 is installed in the vicinity of the outlet side of the hot water tank 4, and the hot water flow rate at which these detected temperatures T 3 and T 4 flow to the hot water tank 4 side. And the setting and control of the distribution ratio between the flow rate of the hot water flowing in the diversion channel 24. The temperature sensor 44 is a first temperature sensor that detects the temperature of the hot water HM1 that is a heat 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 6 from the load side.

  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 and secondary heat exchangers 28 and 30 to circulate the hot water HM1 in the circulation path 6. .

  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 circulation path 6 on the outlet side of the primary heat exchanger 28, and a temperature sensor 50 is installed in the circulation path 6 on the outlet side of the secondary heat exchanger 30, and these detected temperatures T5 and T6 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 6 and circulates the low temperature side hot water HM1 to 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 6 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 heat exchanging means for exchanging heat of the hot water HM1 to the water supply W. The hot water supply heat exchanger 56 is an example of hot water supply heat exchanging means, and is installed in a circulation path 6A branched from the circulation path 6 via a high-temperature distribution valve 62, and the hot water HM1 circulates through the circulation path 6A. . 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 memorial heat exchanger 70 is an example of a heat exchanging means for exchanging heat of the hot water HM1 to the bath water BW, and is installed in the circulation path 6B branched to the circulation path 6 via the high-temperature distribution valve 62. The warm water HM1 circulates through the circulation path 6B. 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 6, and the outside air temperature T <b> 10 is detected by the temperature sensor 80.

  These detected temperatures T1 to T10 are taken into the control device 82 (FIG. 2) as control information, and the control device 82 (FIG. 2) controls the driving of the heat collecting pump 14, the circulation pump 26, the recuperation pump 72, and the combustion of the burner 46. ).

  The control device 82 will be described with reference to FIG. FIG. 2 is a diagram illustrating the control device. The configuration illustrated in FIG. 2 is an example, and the present invention is not limited to such a configuration. 2, the same parts as those in FIG. 1 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 unit, and generates time information for time control. 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 hot water tank switching valve 40 will be described with reference to FIGS. 3, 4, 5, and 6. 3 is a sectional view showing an example of a hot water tank switching valve, FIG. 4 is a diagram showing a switching function of the switching valve, FIG. 5 is a diagram showing a control position and opening / closing of the valve, and FIG. 6 is a control position and flow rate. It is a figure which shows a ratio.

  As described above, the hot water tank switching valve 40 is a flow path switching unit installed at a branch point between the circulation path 6 and the branch flow path 24. As shown in FIG. 3, the hot water tank switching valve 40 is provided with an inlet port 110 and first and second outlet ports 112 and 114 in the valve body 108. The circulation path 6 on the low temperature heater 52 side is connected to the inlet side port 110, the circulation path 6 on the hot water storage tank 4 side is connected to the outlet side port 112, and the branch path 24 is connected to the outlet side port 114. Has been. A valve 118 is rotatably installed in the valve chamber 116 of the valve body 108, and a drive motor 122 is attached to the valve shaft 120.

  As shown in FIG. 4, the hot water tank switching valve 40 includes switching points of control positions A, B, C, and D of the valve 118, the control positions A and D are limit positions, and the angle θ is the valve 118. The rotation angle is shown. As shown in FIG. 5, with respect to each control position A, B, C, D, the control position A is fully opened to the hot water storage tank 4 side, and the control position B is open to the hot water storage tank 4 side: branching channel 24 side = 1: 1. At the control position C, the hot water tank 4 side: branch channel 24 side = 1: 2 opening degree, and at the control position D, the hot water tank 4 side is fully closed.

By such switching of the opening, as shown in FIG. 6, with respect to the control positions A, B, C, D, the flow rate ratio between the hot water storage tank 4 side and the branch flow path 24 side is obtained, and L is the total flow rate of the hot water HM1. , L ₁ is the flow rate of the hot water HM1 that is diverted to the branch channel 24 side, and L-L ₁ is the flow rate of the hot water HM1 that is diverted to the hot water storage tank 4 side.

  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. The heat collecting operation for heating the will be described.

  (1) Low temperature heating operation

  This low temperature heating operation will be described with reference to FIGS. FIG. 7 is a diagram for explaining circulation of hot water HM1 in low-temperature heating, FIG. 8 is a diagram showing switching operation of the hot water storage tank switching valve 40 in low-temperature heating, and FIG. 9 is another circulation of hot water HM1 in low-temperature heating. It is a figure for demonstrating.

  In this low temperature heating operation, as indicated by a thick line in FIG. 7, 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 required temperature is supplied to the low temperature heater 52. Circulate hot water HM1.

  In the processing procedure of this low-temperature heating operation, as shown in FIG. 8, the detected temperature T3 is compared with the detected temperature T4 (step S11). The detected temperature T3 is the outlet temperature of the low temperature heater 52 of the hot water HM1, and the detected temperature T4 is the temperature of the hot water HM1 in the hot water storage tank 4. If the detected temperature T4 of the hot water HM1 is higher than the detected temperature T3 (T4> T3), the hot water HM1 in the hot water storage tank 4 can be used for heating the hot water HM1.

  Therefore, if T4 ≦ T3 (NO in step S11), there is no need to use the hot water HM1 in the hot water storage tank 4, so the hot water storage tank switching valve 40 is fully closed on the hot water storage tank 4 side (step S12).

  If T4> T3 (YES in step S11), it is possible to use the hot water HM1 in the hot water storage tank 4, so it is determined whether or not the operation is a low temperature heating single operation (step S13). If it is not the low temperature heating single operation (NO in step S13), the hot water tank switching valve 40 is fully opened on the hot water tank 4 side (step S14). In this case, the diversion channel 24 is not used.

If it is the low temperature heating single operation (YES in step S13), it is determined whether or not the detected temperature T4 of the hot water HM1 in the hot water storage tank 4 is equal to or higher than the low temperature heating request temperature Tf (T4 ≧ Tf) (step S15). If T4 <Tf (NO in step S 15), but only the hot water HM1 of the hot water storage tank 4 can not be used in low temperature heating operation, the hot water storage tank switching valve 40 to fully open the hot water tank 4 side (step S14).

  If T4 ≧ Tf (YES in step S15), combustion of the burner 46 is not necessary, and the hot water provided from the hot water storage tank 4 is adjusted so that the temperature of the hot water storage tank switching valve 40 is adjusted to the required low temperature heating temperature Tf. HM1 and the return hot water HM1 from the low-temperature heater 52 are mixed (step S16).

The mixing ratio of the hot water HM1 provided from the hot water storage tank 4 and the return hot water HM1 from the low-temperature heater 52 is:
a) Flow rate on the hot water storage tank 4 side: Flow rate on the branch channel 24 side = 1: 0
b) Flow rate on the hot water storage tank 4 side: Flow rate on the branch channel 24 side = 1: 1
c) Flow rate on the hot water storage tank 4 side: Flow rate on the branch channel 24 side = 1: 2
d) Flow rate on the hot water storage tank 4 side: Flow rate on the branch channel 24 side = 0: 1
4 patterns. This is an example, and the pattern may be increased or the ratio may be changed.

  In this case, in cases other than low temperature heating alone (NO in step S13) and T4 <Tf (NO in step S15), the control is switched to the combustion control (FIG. 9) instead of the adjustment control in the hot water tank switching valve 40. That is, the fuel gas is burned by the burner 46, and the hot water HM1 is heated by the latent heat or sensible heat of the combustion heat, so that the hot water storage tank switching valve 40 is fully opened (step S14). If T4 ≦ T3, it is determined that there is no heat storage, and the hot water tank switching valve 40 is fully closed (step S12).

Here, L a flow rate of the hot water HM1 flowing from the circulation path 6 in the hot water storage tank switching valve 40, the flow rate of the hot water HM1 shunting the shunt path 24 L _1, the flow rate of the hot water HM1 flowing in the hot water storage tank 4 (L-L _1), the detected temperature of the hot water HM1 flowing the T3 in the hot water storage tank switching valve 40, the detected temperature of the hot water HM1 of T4 hot water tank 4, a low-temperature heating demand temperature Tf, the flow rate (L-L ₁₎ to the flow rate L Expressed as temperatures T3, T4, and Tf,
(L−L ₁ ) / L = 1−L ₁ / L
= 1- (T4-Tf) / (T4-T3)
= (T4-T3-T4 + Tf) / (T4-T3)
= (Tf-T3) / (T4-T3) (1)
It becomes. Here, when the flow rate ratio {L ₁ : (L−L ₁ )} between the flow rate L ₁ and the flow rate (L−L ₁ ) is represented by temperature,
L ₁ : (L−L ₁ )
= (T4-Tf) / (T4-T3) :( Tf-T3) / (T4-T3)
= T4-Tf: Tf-T3 (2)
It becomes.

  Therefore, control when the hot water temperature of the hot water storage tank 4 is lower than the required temperature of the low-temperature heater 52, at an appropriate temperature, or at a high temperature will be described.

  A) When the hot water temperature of the hot water storage tank 4 is lower than the required temperature of the low temperature heater 52 (low temperature)

  When an operation signal is input from the low-temperature heater 52 to the control device 82, the operation of the circulation pump 26 is started. Even when the detected temperature T4 of the hot water HM1 in the hot water storage tank 4 is lower than the required temperature Tf of the low temperature heater 52, if T4> T3, the hot water storage tank switching valve 40 is fully closed on the side of the branch channel 24, 4 warm water HM1 is used. In this case, the hot water HM1 having the required temperature cannot be fed into the low-temperature heater 52. Since the detected temperature T6 of the hot water HM1 sent out from the circulation pump 26 is lower than the required temperature of the low-temperature heater 52, the hot water HM1 is heated by the primary heat exchanger 28 and the secondary heat exchanger 30. When the detected temperature T3 becomes higher than the detected temperature T4 due to combustion heating, the hot water storage tank switching valve 40 is fully opened on the side of the branch flow path 24.

  B) When the hot water temperature of the hot water storage tank 4 is the same as the required temperature of the low-temperature heater 52 (appropriate temperature)

  When an operation signal is input from the low-temperature heater 52 to the control device 82, the operation of the circulation pump 26 is started. When the detected temperature T4 of the hot water HM1 in the hot water storage tank 4 is the same as the required temperature of the low temperature heater 52 (appropriate temperature), the hot water tank switching valve 40 is fully opened on the hot water tank 4 side. If the detected temperature T6 of the hot water HM1 sent out from the circulation pump 26 is the required temperature of the low temperature heater 52, the hot water HM1 is sent from the hot water storage tank 4 to the low temperature heater 52 as it is.

  C) When the hot water temperature of the hot water storage tank 4 is higher than the required temperature of the low-temperature heater 52 (high temperature)

  In this case, temperature adjustment by combustion is not performed, but only valve opening adjustment is performed. When an operation signal is input from the low-temperature heater 52 to the control device 82, the operation of the circulation pump 26 is started. When the detected temperature T4 of the hot water HM1 in the hot water storage tank 4 is higher than the required temperature of the low temperature heater 52, the valve opening degree of the hot water tank switching valve 40 is adjusted. This valve opening is determined by the equation (2) at the start of operation. Thereafter, when the detected temperature T6 is higher than the required temperature, the hot water HM1 (that is, the low temperature heater 52) that flows from the hot water storage tank 4 side to the branch channel 24 side. ) And the temperature of the hot water HM1 from the hot water storage tank 4 is lowered. If the detected temperature T6 of the hot water HM1 sent from the circulation pump 26 in this state is the required temperature of the low temperature heater 52, the valve opening degree is maintained and the hot water HM1 is continuously circulated to the low temperature heater 52.

  If the detected temperature T6 of the hot water HM1 is higher than the required temperature of the low-temperature heater 52 despite the above adjustment, the hot water storage tank switching valve 40 is switched to the branch flow path 24 side and the hot water HM1 in the hot water storage tank 4 is used. To stop. Since the combustion heating is not performed, the detection temperature T6 is gradually lowered by the heat radiation of the low-temperature heater 52, so that the control described later is performed.

  When the detected temperature T6 of the hot water HM1 is lower than the required temperature of the low-temperature heater 52, the degree of use of the hot water tank switching valve 40 is adjusted to increase the usage amount of the hot water HM1 in the hot water tank 4. Increase the temperature of HM1. If the temperature is the required temperature of the low-temperature heater 52, the circulation continues to the low-temperature heater 52.

  In this way, the hot water HM1 on the hot water storage tank 4 side uses only the temperature drop of the hot water HM1 on the low temperature heater 52 side according to the flow rate, so that the amount of heat stored on the hot water storage tank 4 side is reduced.

  By the way, when the hot water HM1 is heated by the primary heat exchanger 28 and the secondary heat exchanger 30 accompanied by the combustion control of the burner 46, the hot water tank switching valve 40 is normally fully closed when T4 <T3. However, as shown in FIG. 9, the hot water tank switching valve 40 is fully opened on the hot water tank 4 side, and the secondary heat exchanger 30 exchanges the latent heat of the combustion exhaust with the hot water HM1 and circulates it to the low temperature heater 52. . In this case, the hot water HM1 obtained by exchanging the sensible heat of the combustion exhaust with the primary heat exchanger 28 is circulated to the hot water storage tank 4 through the circulation path 6A. Thereby, while being able to control the warm water HW1 which flows into the low temperature heater 52 to required temperature, the warm water HW1 of the hot water storage tank 4 can be heated up and can be stored.

  (2) High temperature heating operation

  This high temperature heating operation will be described with reference to FIG. FIG. 10 is a diagram for explaining circulation of hot water HM1 in high-temperature heating.

  As shown in FIG. 10, the high-temperature heating operation is an operation in which the hot water HM1 is circulated through the high-temperature heater 54 and is radiated by the high-temperature hot water HM1.

  In this case, 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 that has flowed to the high-temperature distribution valve 62 of the circulation path 6 is diverted to the circulation path 6A, 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 6A is used as a circulation circuit until the high-temperature heater 54 becomes operable and a hot water supply heating path that can respond immediately when a hot water supply is requested.

  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. 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 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

  This hot water supply operation will be described with reference to FIG. FIG. 11 is a diagram for explaining circulation of hot water HM1 in the hot water supply operation.

  As shown in FIG. 11, this hot water supply operation is an operation of circulating hot water HM1 through the hot water supply heat exchanger 56, exchanging heat of the hot water HM1 with the hot water W, and supplying hot water as the hot water HW.

  In this case, the water supply W that has entered the heating / hot water supply / remedy 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 this case, the circulating operation of the hot water HM1 is as follows. When the water amount sensor in the hot water supply circuit 36 detects 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, that is, 80 [° C.] exchanges heat 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

  This bathtub pouring operation will be described with reference to FIG. FIG. 12 is a diagram for explaining circulation and pouring of hot water HM1 in a bath pouring operation.

  In this bathtub pouring operation, as shown in FIG. 12, hot water HM1 is circulated in the hot water supply heat exchanger 56, and hot water HW obtained by heat exchange of the heat of the hot water HM1 with the hot water W is poured into the bathtub 68 side. It is an operation to do.

  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

  About this bathtub water pursuit operation | movement, FIG. 13 is referred. FIG. 13 is a diagram for explaining circulation and replenishment of the hot water HM1 in the bathtub water retreat operation.

  As shown in FIG. 13, the bathtub water tracking operation is an operation of circulating the hot water HM1 in the tracking heat exchanger 70 and exchanging heat of the hot water HM1 with the bathtub water BW.

  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 bath water BW is circulated to the reheating circuit 38, and heat of the hot water HM1 is heat-exchanged by the reheating 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. 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 6B side, the warm water HM1 is allowed to flow on the circulation path 6B 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 6B. 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 that has been deprived of heat by 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 6A, and is returned to the hot water storage tank 4. The circulation path 6A 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

  This solar heat collecting operation will be described with reference to FIGS. 14 and 15. FIG. 14 is a diagram for explaining the circulation of the hot water HM1 in the solar heat collecting operation, and FIG. 15 is a flowchart showing the heat collecting operation.

  In this solar heat collecting operation, as shown in FIG. 14, the hot water HM2 is circulated through the solar heat collecting circuit 8, the solar heat is exchanged with the hot water HM2, and the heat of the hot water HM2 is exchanged with the solar heat in the hot water storage tank 4. This is an operation of exchanging heat with the hot water HM1 in the vessel 12.

  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.

  As for the solar heat that can be used for the solar heat collecting circuit 8, the time of sunrise and sunset changes depending on the season, and the time zone with solar radiation also changes. 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 hot water HM2 circulates in the solar heat collecting circuit 8, 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. When the set time comes to the stop time of the heat collection pump 10, the operation of the heat collection pump 10 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.

  In this heat collecting operation, as shown in FIG. 15, when the heat collecting operation start time comes (step S21), the heat collecting pump 14 is operated (step S22). At this time, the solar switching valve 16 is closed on the hot water storage tank 4 side (step S23). The hot water HM2 circulates through the solar heat collecting circuit 8 and compares the detected temperature T2 with the detected temperature T4 (step S24). If T2> T4, the solar switching valve 16 is opened on the hot water storage tank 4 side (step S25). ), The solar heat is stored in the hot water HM2.

  If T2> T4 is not satisfied, the solar switching valve 16 keeps the hot water storage tank 4 side closed (step S26), and stores the detected temperature T1 in, for example, the RAM 88 as storage means (step S27). The detected temperature T2 is compared with the stored detected temperature T1 'after a predetermined time, for example, t seconds from the detection time (step S28). If T2> T1 ', the heat collecting panel 10 collects heat, so the process returns to step S24 to determine whether heat can be stored. If T2> T1 ', since heat cannot be collected, the heat collecting pump 14 is stopped (step S29), and after a predetermined interval operation (step S30), the process returns to step S21. The same heat collecting operation is continuously performed.

  The matters improved by the above embodiment are as follows.

  (1) In the heating / hot water supply / remembrance device 2, solar heat collection control and hot water supply / heating control are parallelized. Solar heat collection is performed during solar radiation and is stored in the hot water storage tank 4. If hot water is stored in the hot water storage tank 4, the heat of the hot water HM1 in the hot water storage tank 4 is used for hot water supply and heating. At the time of use, the temperature of the circulating hot water HM1 rises due to solar heat, so the consumption of fuel gas consumed by the combustion of the burner 46 is reduced, and the thermal efficiency can be increased by the amount of use of the heat of the hot water HM1 in the hot water storage tank 4. it can. Furthermore, since the warmed hot water HM1 circulates directly to the heating load, solar heat can be used efficiently for heating.

  (2) Unlike the conventional solar system that stores heat in the water supply, the heating / hot water supply / remembrance device 2 does not store heat in the water supply, so the water supply temperature does not rise due to solar heat. This is because the temperature of the hot water HM1 circulating to the secondary heat exchanger 30 that is a latent heat recovery device that uses the latent heat of the combustion exhaust as a heat source can be lowered, so that it can be used without impairing the performance of the secondary heat exchanger 30, Thermal energy can be used efficiently.

  (3) On the preheating side, the hot water HM1 is heated to 80 [° C.] by the burner 46, and the circulation amount is about 12 [liter / min], so the temperature of the hot water HM1 returning from the hot water supply heat exchanger 56 is about 30 [° C.], and this control can be performed regardless of the season. Therefore, the hot water HM1 can always be maintained at 30 [° C.] or higher, and the solar water is stored in the hot water HM1, so that the hot water HM1 of about 60 [° C.] can be obtained even in winter, and the hot water HM1 is circulated directly to the heating load. By doing so, solar heat can be used efficiently.

  (4) According to the test data of the heating / hot water supply / remembrance device 2, the maximum temperature of the hot water HM1 is about 80 [° C.]. In the low-temperature heating operation, the temperature circulating to the low-temperature heating load is controlled to be 60 [° C.] or 40 [° C.], but when the hot water temperature of the hot water storage tank 4 is high, the hot water HM1 of the hot water temperature is kept as it is. It cannot be circulated to the heating circuit. Therefore, the opening degree of the hot water storage tank switching valve 40 is adjusted so that the return hot water HM1 from the low temperature heating load and the hot water HM1 of the hot water storage tank 4 are mixed and lowered to the required temperature for the low temperature heating and circulated. It is possible to realize the heat storage by the very efficient hot water HM1 and the saving of the heat use.

  (5) Thus, the hot water distribution valve (hot water tank switching valve 40) whose opening degree can be adjusted is used for switching the flow path to the hot water tank 4, and the hot water HM1 in the hot water tank 4 is higher than the required heating temperature. In this case, the opening degree is adjusted, the warm water HM1 returned from the heating terminal and the warm water HM1 in the hot water storage tank 4 are mixed, and the hot water can be circulated in the heating circuit by making the required temperature hot water, The utilization efficiency of thermal energy can be increased.

[Second Embodiment]

  In the first embodiment, the case where the latent heat is used from the combustion exhaust of the burner 46 to heat the hot water HM1 has been described. However, as shown in FIG. 16, the secondary heat exchanger 30 (FIG. 1) is not used. The primary heat exchanger 28 may be a heating source.

[Other Embodiments]

  (1) In the above embodiment, the high-temperature water obtained by connecting the solar heat collecting circuit 8 to the heating circuit of the high-temperature water distribution type heating water heater and using the solar heat as a heat source and exchanging heat with solar heat. However, the present invention is not limited to such a heat source that uses solar heat. 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 4 for detecting the temperature of the hot water HM1 in the hot water storage tank 4 is installed on the side of the circulation path 6 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 6 Circulation path 24 minute flow path 32 Low temperature heating circuit 40 Hot water storage tank switching valve 42, 44 Temperature sensor

Claims (6)

A storage means for storing the heat medium;
A circulation path for circulating the heat medium to the heat radiation load;
Heat exchange means installed in the circulation path and heating the heat medium by heat exchange;
The heat medium that is formed in the circulation path between the entry side and the exit side of the storage means, diverts the heat medium that has passed through the heat radiation load, bypasses the storage means, and stores the storage medium on the exit side of the storage means. A diversion channel that merges with the heat medium provided by the means;
A flow rate distribution means for distributing the heat medium flow that has passed through the heat dissipation load to the heat medium flow rate that flows to the storage means and the heat medium flow rate that flows to the branch flow path;
A first temperature sensor for detecting the temperature of the heating medium in the storage means;
A second temperature sensor that detects the temperature of the heating medium that passes through the heat dissipation load and returns to the circulation path;
When the temperature detected by the first temperature sensor is higher than the temperature detected by the second temperature sensor and lower than the required temperature of the heat radiation load, the distribution ratio of the heat medium by the flow rate distribution means is changed. The heat medium that has passed through the heat radiation load is allowed to flow only to the storage means, and the heat medium provided from the storage means is heated by the heat exchange means, whereby the temperature of the heat medium that flows to the heat radiation load is increased. Adjust to the required temperature of the heat dissipation load,
When the detected temperature of the first temperature sensor is higher than the detected temperature of the second temperature sensor and higher than the required temperature of the heat medium load, the distribution ratio of the heat medium by the flow rate distribution means is adjusted to By flowing the heat medium that has passed through the heat radiation load through both the storage unit and the branch channel, and mixing the heat medium provided from the storage unit and the heat medium flowing through the branch channel, the heat dissipation Adjust the temperature of the heating medium flowing to the load to the required temperature of the heat dissipation load,
When the detected temperature of the second temperature sensor is equal to or higher than the detected temperature of the first temperature sensor, the distribution ratio of the flow distribution means is changed, and the heat medium that has passed through the heat radiating load is transferred to the branch flow path. A heat source device characterized by flowing only.   2. The heat source device according to claim 1, wherein a distribution ratio of the heat medium by the flow rate distribution unit is controlled using a detection temperature of the first temperature sensor and a detection temperature of the second temperature sensor. .   The heat source apparatus according to claim 1, wherein solar heat is used as a heat source for heating the heat medium stored in the storage means.   Circulating either one or both of the first heat exchange means for exchanging sensible heat of combustion exhaust gas to the heat medium and the second heat exchange means for exchanging latent heat of combustion exhaust gas to the heat medium. It is provided in a path, and when the temperature of the heat medium is lower than a predetermined temperature, the heat medium is heated by one or both of the first heat exchange means and the second heat exchange means. Item 2. The heat source device according to Item 1.   The heat source device according to claim 1, further comprising a hot water supply heat exchanging means for exchanging heat of the heat medium flowing through the circulation path with hot water.   The heat source device according to claim 1, wherein the circulation path is provided with additional heat exchange means for exchanging heat of the heat medium flowing through the circulation path with bathtub water.

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